CN211350126U

CN211350126U - Novel separated twisted pair

Info

Publication number: CN211350126U
Application number: CN202020372876.XU
Authority: CN
Inventors: 张奋
Original assignee: Shenghui Wire And Cable Shenzhen Co Ltd
Current assignee: Shenghui Wire And Cable Shenzhen Co Ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-08-25
Anticipated expiration: 2030-03-20

Abstract

The utility model discloses a novel separated twisted pair, which relates to the field of twisted pairs, and the key points of the technical scheme are that the novel separated twisted pair comprises a grounding inner core, a supporting framework, a twisted pair and an outer protective layer, wherein the supporting framework is wrapped on the grounding inner core and is axially arranged along the grounding inner core, the twisted pair is embedded in the supporting framework, the outer protective layer is sleeved on the supporting framework, a plurality of mounting grooves for accommodating the twisted pair are arranged on the supporting framework, an electric shielding layer is plated on the groove wall of each mounting groove, an electric shielding seal strip is arranged at the notch of each mounting groove, and the two opposite sides of the electric shielding seal strip are respectively abutted against the electric shielding layer to mutually match; and a plurality of metal contacts for electrically connecting the grounding inner core and the electric shielding layer are arranged in the supporting framework. The technical effect is that the phenomenon that a part of the electric shielding layer can not be effectively grounded due to the fact that a certain part of the electric shielding layer is broken can be effectively avoided, and the transmission performance of the twisted pair is guaranteed.

Description

Novel separated twisted pair

Technical Field

The utility model relates to a paired line field, in particular to novel disconnect-type paired line.

Background

The shielded twisted pairs have a metallic shield between the twisted pairs and an outer insulating jacket. Shielded twisted pairs are divided into STP, which means that each wire has its own shield, and FTP, which only works when the entire cable has a shield and both ends are properly grounded. The whole system is required to be a shielding device including cables, information points, crystal heads, distribution frames and the like, and a good grounding system is required for the building. The shielding layer can reduce radiation, prevent information from being intercepted, and also can prevent external electromagnetic interference from entering, so that the shielded twisted pair has higher transmission rate than the similar unshielded twisted pair.

However, in practical construction, it is difficult to perfectly ground the shielding layer of each wire of STP, for example, the shielding layer of a certain wire is locally broken, so that the shielding layer which is not grounded after being broken becomes the largest interference source, resulting in performance far inferior to that of the unshielded twisted pair.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel disconnect-type paired line, it can effectively avoid in the electric shielding layer certain fracture and lead to the phenomenon of the unable effective ground connection of part electric shielding layer, has guaranteed the transmission performance of paired line.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a novel separated twisted pair comprises a grounding inner core, a supporting framework, a twisted pair and an outer protective layer, wherein the supporting framework is wrapped on the grounding inner core and is axially arranged along the grounding inner core, the twisted pair is embedded in the supporting framework, the outer protective layer is sleeved on the supporting framework, a plurality of mounting grooves used for accommodating the twisted pair are formed in the supporting framework, an electric shielding layer is plated on the groove wall of each mounting groove, an electric shielding seal is mounted at the notch of each mounting groove, and the two opposite sides of each electric shielding seal are respectively abutted against the electric shielding layers to be matched with the electric shielding layers to form a closed space; and a plurality of metal contacts for electrically connecting the grounding inner core and the electric shielding layer are arranged in the supporting framework.

By adopting the technical scheme, the electric shielding seal is electrically connected with the electric shielding layer on the wall of the mounting groove to form a closed space isolated from the outside, which is similar to the shielding layer of STP, and an electromagnetic field generated inside and the outside cannot interfere with each other in the closed shielding space. And because the grounding inner core is connected with the electric shielding layer through a plurality of metal contacts, the electric shielding layer is equivalent to multi-point grounding, and compared with the scheme that two ends of the electric shielding layer of STP in the prior art are grounded, the phenomenon that part of the electric shielding layer cannot be effectively grounded due to breakage of a certain part in the electric shielding layer can be effectively avoided, so that the transmission performance of the twisted pair is ensured.

Further setting: the metal contacts are arranged at intervals in the length direction of the supporting framework.

By adopting the technical scheme, when the electric shielding layer of the supporting framework is broken at multiple positions to cause poor grounding at multiple positions, the metal contacts can connect the electric shielding layer of the supporting framework and the electric shielding layer of the supporting framework to the grounding inner core respectively so as to ensure perfect grounding. Or when the grounding inner core is broken, the grounding inner cores on two sides of the broken part can be electrically connected with the electric shielding layer through the metal contact, so that the grounding effect is ensured.

Further setting: the electric shielding seal strip comprises an epoxy resin strip and a metal coating arranged on the surface of the epoxy resin strip.

Further setting: the electric shielding layer and the metal coating are made of copper alloy materials.

Through adopting above-mentioned technical scheme, epoxy has better elasticity, can be impressed in the mounting groove and excessively cooperate with the cell wall of mounting groove. The electric shielding layer and the metal coating are made of copper alloy materials, copper has excellent conductive characteristics, and the coating can be conveniently formed on the surfaces of the supporting framework and the epoxy resin strip by methods such as evaporation plating or electroplating.

In addition, the electric shielding seal strip is not connected with the support framework in an integrated manner, when the twisted-pair cable in the mounting groove is required to be led out in use, only the outer protective layer is required to be annularly cut and the corresponding electric shielding seal strip is cut off, and the electric shielding seal strip is pulled out outwards by force, so that the effect of tearing the rope can be achieved.

Further setting: each the mounting groove is even interval arrangement, just the mounting groove is the heliciform setting around ground connection inner core in the length direction of ground connection inner core.

Through adopting the technical scheme, work as the utility model discloses when receiving external force and taking place the elongation, because the mounting groove is the heliciform setting, consequently take place the elongation the twisted pair line and will take place the extrusion towards the ground connection inner core, the spiral radius reduces to take place the extension on the length direction of ground connection inner core, compare in the direct length direction setting along the ground connection inner core, can avoid the twisted pair line to be elongated and change characteristic impedance effectively, influence signal transmission quality.

Further setting: the width of the notch of the mounting groove is larger than the maximum width between the groove walls.

Through adopting above-mentioned technical scheme, when the electrical shield strip of paper used for sealing was pressed in the notch of mounting groove, will receive the oppression of cell wall and difficult emergence breaks away from.

Further setting: the outer protective layer is made of ethylene propylene rubber material.

By adopting the technical scheme, the ethylene propylene rubber has excellent weather resistance, ozone resistance, heat resistance, acid and alkali resistance, water vapor resistance, color stability, electrical property, oil filling property and normal temperature fluidity, also has excellent electrical insulation property and corona resistance, and the electrical property is superior to or close to styrene butadiene rubber, chlorosulfonated polyethylene, polyethylene and crosslinked polyethylene.

Further setting: the surface of the outer protection layer is provided with a plurality of reinforcing ribs along the length direction of the grounding inner core, and the reinforcing ribs are uniformly arranged at intervals along the circumferential direction of the outer protection layer.

By adopting the technical scheme, when the outer protection layer is bent under the action of external force, the reinforcing rib on the inner side of the bend is extruded to transmit the force to the whole reinforcing rib, the reinforcing rib on the outer side of the bend is stretched to transmit the force to the whole reinforcing rib, the whole reinforcing rib deforms to reduce the local bending radian, and the phenomenon that the local thickness is changed due to the fact that the inner twisted pair is subjected to plastic deformation through the overlarge bending radian is avoided, and the influence on the electrical performance is caused.

To sum up, the utility model discloses following beneficial effect has:

1. the phenomenon that part of the electric shielding layer cannot be effectively grounded due to the fact that a certain part in the electric shielding layer is broken can be effectively avoided, and the transmission performance of the twisted pair is guaranteed;

2. the twisted pair cable has better tensile resistance and bending resistance, is convenient to use, and is convenient for people to lead out the twisted pair cable from the mounting groove.

Drawings

FIG. 1 is a general schematic diagram of a novel split twisted pair cable of the present embodiment;

fig. 2 is a cross-sectional view of a novel split twisted pair of the present embodiment in a plane perpendicular to the length of the grounded core.

In the figure, the position of the upper end of the main shaft,

1. a grounded inner core;

2. a support framework; 21. mounting grooves; 22. an electrical shielding layer; 23. a metal contact;

3. an electrically shielding seal; 31. epoxy resin strips; 32. a metal plating layer;

4. a twisted pair;

5. an outer protective layer; 51. and (4) reinforcing ribs.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A novel separated twisted pair, referring to fig. 1, comprises a grounding inner core 1, a supporting framework 2 wrapped on the grounding inner core 1 and axially arranged along the grounding inner core 1, a twisted pair 4 embedded in the supporting framework 2, and an outer protective layer 5 sleeved on the supporting framework 2.

Referring to fig. 1 and 2, a cross section of the support frame 2 perpendicular to the length direction of the grounding core 1 may be square, circular or other shapes, in this embodiment, circular, the support frame 2 is cylindrical as a whole, and the grounding core 1 is disposed at the axis of the support frame 2. The grounding inner core 1 may be made of a copper core, an aluminum core or other metal core wires, and in this embodiment, the grounding inner core 1 is made of a copper core. Meanwhile, in the present embodiment, the support frame 2 is made of an epoxy resin material.

The supporting frame 2 is provided with a plurality of mounting grooves 21 for accommodating the twisted pairs 4, and in the present embodiment, the number of the mounting grooves 21 is four, which can be used for accommodating four twisted pairs 4. The four mounting grooves 21 are uniformly arranged at intervals in the circumferential direction of the support frame 2, and the mounting grooves 21 are spirally arranged around the grounding inner core 1 in the length direction of the grounding inner core 1.

The width of the notch of the mounting groove 21 is larger than the maximum width between the walls of the groove, and the cross section on the plane perpendicular to the length direction of the grounding core 1 can be circular, trapezoidal or other shapes, in this embodiment, the cross section is circular with a notch, and the width of the notch is smaller than the diameter of the circular cross section. The walls of the mounting groove 21 are plated with an electrical shield layer 22, and the electrical shield layer 22 is made of a copper alloy material in this embodiment.

A plurality of metal contacts 23 are arranged in the supporting framework 2, the metal contacts 23 are arranged at intervals in the length direction of the supporting framework 2, and the grounding inner core 1 is electrically connected with the electric shielding layers 22 in the installation grooves 21.

The electric shielding seal 3 is installed in the notch of the installation groove 21, the electric shielding seal 3 includes an epoxy resin strip 31 and a metal plating layer 32 disposed on the surface of the epoxy resin strip 31, and in the present embodiment, the metal plating layer 32 is made of a copper alloy material. The two opposite sides of the electric shielding seal 3 are respectively abutted against the electric shielding layer 22, and the metal plating layer 32 is electrically connected with the electric shielding layer 22, so that the electric shielding seal 3 and the electric shielding layer 22 are mutually matched to change the inside of the mounting groove 21 into a closed space.

The outer protective layer 5 is sleeved outside the supporting framework 2, and the inner surface of the outer protective layer 5 is attached to the surface of the supporting framework 2. In the present embodiment, the outer protective layer 5 is made of an ethylene propylene rubber material. The surface of the outer protective layer 5 is provided with a plurality of reinforcing ribs 51 along the length direction of the grounding inner core 1, and the reinforcing ribs 51 are uniformly arranged at intervals along the circumferential direction of the outer protective layer 5.

The above-mentioned embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the present invention.

Claims

1. The novel separated twisted pair is characterized by comprising a grounding inner core (1), a support framework (2) which is wrapped on the grounding inner core (1) and axially arranged along the grounding inner core (1), a twisted pair (4) embedded in the support framework (2) and an outer protection layer (5) sleeved on the support framework (2), wherein the support framework (2) is provided with a plurality of mounting grooves (21) for accommodating the twisted pair (4), the groove wall of each mounting groove (21) is plated with an electric shielding layer (22), the notch of each mounting groove (21) is provided with an electric shielding seal (3), and the two opposite sides of each electric shielding seal (3) are respectively abutted against the electric shielding layers (22) to be matched with the electric shielding layers (22) to form a closed space; and a plurality of metal contacts (23) for electrically connecting the grounding inner core (1) and the electric shielding layer (22) are arranged in the supporting framework (2).

2. The twisted pair of new split conductors of claim 1, wherein said metal contacts (23) are spaced apart in the length direction of the supporting backbone (2).

3. The novel twisted pair splitter as claimed in claim 2, wherein each of said mounting grooves (21) is uniformly spaced and said mounting grooves (21) are helically disposed around the grounding core (1) in the length direction of the grounding core (1).

4. The novel twisted pair splitter set forth in claim 1, wherein the slot opening width of said mounting slot (21) is greater than the maximum width between the slot walls.

5. The novel twisted pair splitter according to claim 2, wherein said electrically shielding seal (3) comprises an epoxy strip (31) and a metal coating (32) provided on the surface of the epoxy strip (31).

6. The novel twisted pair of splitters as set forth in claim 5, wherein said electrical shield (22) and metallic plating (32) are made of a copper alloy material.

7. The novel split twisted pair as claimed in claim 1, wherein said outer protective layer (5) is made of ethylene propylene rubber material.

8. The novel split twisted pair as claimed in claim 1, wherein the surface of the outer protective layer (5) is provided with a plurality of reinforcing ribs (51) along the length direction of the grounded inner core (1), and the reinforcing ribs (51) are uniformly spaced along the circumferential direction of the outer protective layer (5).