CN202285176U - Low-voltage remote power supply cable for high-speed Ethernet switch - Google Patents

Abstract

The utility model discloses a low-voltage remote power supply cable for a high-speed Ethernet switch, which comprises: four single-wire copper wires used to transmit electric energy, and the four single-wire copper wires are twisted in a star-twisted manner to form a conductive cable core; the surrounding of the conductive cable core Uniform four pairs of twisted wires; the four pairs of twisted wires are arranged counterclockwise around the periphery of the conductive cable core, and the pitch of the first twisted wire pair and the third twisted wire pair is greater than that of the second twisted wire pair and the fourth twisted wire pair The pitch of the twisted wire pairs, the first twisted wire pair and the third twisted wire pair are arranged alternately with the second twisted wire pair and the fourth twisted wire pair, and the pitch of the first twisted wire pair is greater than that of the third twisted wire pair pitch, the pitch of the second twisted wire pair is greater than the pitch of the fourth twisted wire pair. The low-voltage remote power supply cable of the utility model combines the communication cable and the power transmission cable on the basis of ensuring the transmission characteristics of the communication cable and the power transmission cable, and at the same time can avoid their mutual interference, and realizes the simultaneous communication signal and building switch. The DC-48V power is transmitted to the broadband box of each building.

Description

Low-voltage remote power supply cables for high-speed Ethernet switches

technical field

The utility model relates to a cable for an Ethernet switch, in particular to a low-voltage remote power supply cable for a high-speed Ethernet switch.

Background technique

Most of the existing building switches adopt the power supply method of taking power locally. With the increasingly fierce competition in the telecom transportation business, all telecom operators emphasize branded services and refined operations. The power supply methods of most building switches are no longer suitable for the current competitive situation of telecom services, which affects the service quality of Netcom services.

Specifically, taking electricity locally has the following disadvantages:

① Supply power from local power users or individuals, and it is difficult to coordinate installation and construction.

Network resources cannot be fully utilized, power supply cannot be self-controlled, passively controlled, and poor reliability.

③The voltage fluctuation range of the power grid is large and unstable, which affects the normal operation of the equipment.

④ On-site electricity collection usually has high construction and operation costs.

⑤ The power supply in most provinces and cities across the country is tight, resulting in abnormal power supply of equipment.

⑥Lightning strikes in summer caused a large number of switch failures, and the maintenance volume increased sharply.

Therefore, how to design a low-voltage remote power supply cable for a high-speed Ethernet switch, on the basis of ensuring the transmission characteristics of the communication cable and the characteristics of the power transmission cable, compound the communication cable and the power transmission cable and avoid their mutual interference, has become a common technology in the art The direction of the staff's efforts.

Contents of the invention

The utility model provides a low-voltage remote power supply cable for a high-speed Ethernet switch. On the basis of ensuring the transmission characteristics of the communication cable and the characteristics of the power transmission cable, the low-voltage remote power supply cable is combined with the communication cable and the power transmission cable, and at the same time can avoid their mutual interference. Interference, realize the simultaneous transmission of communication signals and DC-48V power required by building switches to the broadband box of each building.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a low-voltage remote power supply cable for a high-speed Ethernet switch, including: four single-wire copper wires used to transmit electric energy, and the four single-wire copper wires are twisted in a star-quad A conductive cable core is formed; eight copper conductors coated with a polyethylene layer are evenly distributed around the conductive cable core, and the eight copper conductors are twisted in pairs to form four pairs of twisted wire pairs for information communication;

Among the four pairs of twisted wires, the first twisted pair, the second twisted pair, the third twisted pair and the fourth twisted pair are arranged counterclockwise on the periphery of the conductive cable core, and the first twisted pair and The pitch of the third twisted wire pair is greater than the pitch of the second twisted wire pair and the fourth twisted wire pair, the first twisted wire pair and the third twisted wire pair are arranged alternately with the second twisted wire pair and the fourth twisted wire pair, The pitch of the first twisted pair is greater than the pitch of the third twisted pair, and the pitch of the second twisted pair is greater than the pitch of the fourth twisted pair;

The outer surfaces of the four pairs of twisted wires are covered with an aluminum foil shielding layer ;

A layer of polyester tape is wrapped around the surfaces of the four pairs of twisted wires;

A polyethylene layer as an outer sheath covers the surface of the polyester tape layer.

Further improvement technical scheme in above-mentioned technical scheme is as follows:

1. In the above solution, the pitch of the first twisted pair is 17.7 mm, the pitch of the second twisted pair is 11.7 mm, the pitch of the third twisted pair is 14.4 mm, and the pitch of the second twisted pair is 14.4 mm. The pitch of the four twisted pairs is 10.5 mm.

2. In the above solution, between the conductive cable core and the four twisted wire pairs, the surface of the conductive cable core is covered with an aluminum foil layer or a braided copper wire layer.

3. In the above solution, a tearing rope is arranged between the polyester tape layer and the polyethylene layer.

4. In the above solution, the diameter of the copper conductor for information communication is 0.57 mm, and the diameter of the single-wire copper conductor for electric energy transmission is 0.5 mm.

5. In the above solution, both the copper conductor and the single-wire copper conductor are subjected to an annealing process.

Due to the application of the above-mentioned technical solutions, the utility model has the following advantages compared with the prior art:

1. The low-voltage remote power supply cable for the switchboard of the utility model, on the basis of ensuring the transmission characteristics of the communication cable, can simultaneously transmit the communication signal and the DC-48V power supply required by the building switchboard by using the copper cable for communication and the copper wire for power transmission to the broadband box in each building. The central power supply equipment located in the computer room adopts DC suspension isolation technology, equipped with full-featured safety automatic monitoring and protection measures, and outputs 90V-140V adjustable DC power that meets the requirements of international safety standards, and then directly supplies to multiple units through the remote equipment of this system. Ethernet switch power supply.

2. The low-voltage remote power supply cable for the switchboard of the utility model breaks through the traditional twisted-pair cable structure, and adds a star-twisted power transmission line in the middle of the twisted pair, which not only effectively improves the communication cable crosstalk (NEXT, FEXT) index, even increased the margin of loss (INSERTION LOSS), increased the stability of characteristic impedance (IMPEDANCE), and at the same time ensured the stable transmission performance of the cable, increased the transmission performance of the copper cable, and avoided the Disadvantages of taking electricity locally.

3. The utility model is a low-voltage remote power supply cable for switches.

4. The low-voltage remote power supply cable for switches of the utility model, the low-voltage remote power supply cable for high-speed Ethernet switches not only has the ability to transmit signals, but also has the advantages of transmitting power. Compared with taking power locally, this technology enables the power supply of building switches to be Under the unified technical service platform, the technical level of power supply can be effectively improved, and at the same time, a lot of manpower, material resources and financial resources can be saved. It has obvious economic benefit and popularization value.

Description of drawings

Accompanying drawing 1 is the structural diagram of the low-voltage remote power supply cable used for the high-speed Ethernet switch of the present invention.

In the above drawings: 1. Single copper wire; 2. Conductive cable core; 3. Copper conductor; 4. The first twisted pair; 5. The second twisted pair; 6. The third twisted pair; 7. The fourth Twisted pair; 8. Polyester tape layer; 9. Polyethylene layer; 10. Aluminum foil shielding layer; 11. Tear rope.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment: A low-voltage remote power supply cable for a high-speed Ethernet switch, comprising: four single-wire copper conductors 1 for transmitting electric energy, and the four single-wire copper conductors 1 are twisted in a star-quad form to form a conductive cable core 2; the conductive cable There are eight copper conductors 3 coated with a polyethylene layer evenly distributed around the core 2, and the eight copper conductors 3 are twisted in pairs to form four pairs as twisted wire pairs for information communication;

Among the four pairs of twisted wires, the first twisted pair 4, the second twisted pair 5, the third twisted pair 6 and the fourth twisted pair 7 are arranged counterclockwise around the periphery of the conductive cable core 2. The pitch of a twisted wire pair 4 and the third twisted wire pair 6 is greater than the pitch of the second twisted wire pair 5 and the fourth twisted wire pair 7, and the first twisted wire pair 4 and the third twisted wire pair 6 are connected with the second twisted wire pair The wire pairs 5 and the fourth twisted wire pairs 7 are arranged alternately, the pitch of the first twisted wire pair 4 is greater than the pitch of the third twisted wire pair 6, and the pitch of the second twisted wire pair 5 is greater than that of the fourth twisted wire pair The pitch of the wire pair 7; the pitch of the first twisted wire pair 4 is 17.7 mm, the pitch of the second twisted wire pair 5 is 11.7 mm, and the pitch of the third twisted wire pair 6 is 14.4 mm , the pitch of the fourth twisted wire pair 7 is 10.5 mm;

The outer surfaces of the four pairs of twisted wires are covered with an aluminum foil shielding layer 10 ;

A polyester tape layer 8 is wrapped around the surface of the four pairs of twisted wires;

A polyethylene layer 9 as an outer sheath covers the surface of the polyester tape layer 8 .

A tear rope 11 is arranged between the polyester tape layer 8 and the polyethylene layer 9;

Between the conductive cable core 2 and the four twisted wire pairs, the surface of the conductive cable core 2 is coated with an aluminum foil layer or a braided copper layer.

The diameter of the copper conductor 3 for information communication is 0.57 mm, and the diameter of the single-wire copper conductor 1 for transmitting electric energy is 0.5 mm.

Both the copper conductor 3 and the single-wire copper wire 1 are subjected to an annealing process.

The content of the utility model development is as follows.

(1) According to communication cable standards and requirements, design conductor materials and requirements:

Conductor: annealed bare copper conductor;

Conductor structure for communication: 0.57 mm;

Conductor structure for power transmission: 0.5mm;

The mechanical and physical properties of the main and auxiliary materials of the cable should be able to meet the performance index requirements of the product;

The main and auxiliary materials of the cable have good process performance;

During the production process, each main and auxiliary material has no pollution to the production environment, and no harmful substances are generated and discharged;

(2) Cable protective layer: PE is extruded outside the cable core as the outer sheath. The PE outer sheath has tensile and bending resistance properties, ensuring that the cable has no tensile strain and ensures long-term stability of its transmission characteristics.

(3) Main performance indicators of finished cables:

Conductor DC resistance (20°C): ≤95 Ω/km;

Working capacitance of the cable: ≤56 nF/km;

Cable insulation resistance: ≥10000 MΩ·km.

When using the above-mentioned low-voltage remote power supply cables for high-speed Ethernet switches,

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (6)

1. a high speed Ethernet exchange machine is used the low-voltage remote service cable, it is characterized in that: comprising: four single line copper conductors (1) as electric energy transmitting, and these four single line copper conductors (1) are with the stranded formation conduction of star quad stranding formula cable core (2); This conduction cable core (2) is evenly distributed with eight copper conductors (3) that are coated with polyethylene layer all around, and four pairs of twisted wires as information communication of the stranded in twos formation of these eight copper conductors (3) are right;

Said four twisted pair wire centerings, first twisted wire is arranged in order in the periphery of said conduction cable core (2) (7) (6) and the 4th twisted wire (5), the 3rd twisted wire (4), second twisted wire counterclockwise; First twisted wire to (4) and the 3rd twisted wire to the pitch of (6) greater than second twisted wire to (5) and the 4th twisted wire pitch to (7); First twisted wire to (4) and the 3rd twisted wire to (6) and second twisted wire to (5) and the 4th twisted wire to (7) alternately; Said first twisted wire to the pitch of (4) greater than the pitch of the 3rd twisted wire to (6), said second twisted wire to the pitch of (5) greater than the pitch of the 4th twisted wire to (7);

Said four twisted pair wire outer surface all are coated with a foil shielding layer (10)

One polyester belt (8) wrapped in said four twisted pair wires to the surface;

One polyethylene layer as oversheath (9) is coated on said polyester belt (8) surface.

2. low-voltage remote service cable according to claim 1; It is characterized in that: said first twisted wire is 17.7mm to the pitch of (4); Said second twisted wire is 11.7 to the pitch of (5); Said the 3rd twisted wire is 14.4mm to the pitch of (6), and said the 4th twisted wire is 10.5mm to the pitch of (7).

3. according to each described low-voltage remote service cable among the claim 1-2, it is characterized in that: said conduction cable core (2) and four twisted pair wires between and be positioned at conduction cable core (2) surface and be coated with aluminium foil layer or copper wire braid.

4. according to each described low-voltage remote service cable among the claim 1-2, it is characterized in that: be provided with between said polyester belt (8) and the polyethylene layer (9) and tear rope (11).

5. according to each described low-voltage remote service cable among the claim 1-2, it is characterized in that: said copper conductor (3) diameter as information communication is 0.57 mm, is 0.5mm as said single line copper conductor (1) diameter of electric energy transmitting.

6. according to each described low-voltage remote service cable among the claim 1-2, it is characterized in that: said copper conductor (3) and all annealed PROCESS FOR TREATMENT of single line copper conductor (1).

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