CN112687427A

CN112687427A - High-temperature-resistant signal transmission line and processing method

Info

Publication number: CN112687427A
Application number: CN202011491951.5A
Authority: CN
Inventors: 张麟; 乔全宝
Original assignee: Shenzhen Superlink Technology Co ltd
Current assignee: Shenzhen Superlink Technology Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-04-20

Abstract

The invention discloses a high-temperature-resistant signal transmission line and a processing method thereof, wherein the high-temperature-resistant signal transmission line comprises an inner conductor, an insulating layer and a shielding layer, the signal transmission line also comprises a buffer layer and an armor layer, the buffer layer is internally wrapped on the insulating layer and externally wrapped with a plurality of layers of mica tapes, the mica tapes are externally extruded with the armor layer, and the inner conductor, the insulating layer, the buffer layer, the armor layer and the shielding layer are sequentially arranged from inside to outside along the radial direction; the invention provides a high-temperature-resistant signal transmission line and a processing method thereof, aiming at greatly improving the temperature-resistant grade on the basis of ensuring the transmission performance.

Description

High-temperature-resistant signal transmission line and processing method

Technical Field

The application relates to a transmission line, in particular to a high-temperature-resistant signal transmission line and a processing method.

Background

The main structure of the traditional signal transmission line is an inner conductor made of tinned copper wires, PE or PVC is an insulating layer made of insulating materials, and a protective layer can be added on the outer layer according to needs.

In view of the above, a data transmission cable that is resistant to high temperature and has transmission performance meeting the standard is needed.

Disclosure of Invention

The invention mainly aims at the problems and provides a high-temperature-resistant signal transmission line and a processing method thereof, aiming at greatly improving the temperature-resistant grade on the basis of ensuring the transmission performance.

On one hand, in order to achieve the above purpose, the invention provides a high-temperature-resistant signal transmission line, which comprises an inner conductor, an insulating layer and a shielding layer, and further comprises a buffer layer and an armor layer, wherein the insulating layer is wrapped in the buffer layer, a plurality of mica tapes are wrapped outside the buffer layer, the armor layer is extruded outside the mica tapes, and the inner conductor, the insulating layer, the buffer layer, the armor layer and the shielding layer are sequentially arranged from inside to outside along the radial direction.

Furthermore, the inner conductor is coated in the insulating layer to serve as a conducting wire, a single conducting wire or a plurality of twisted conducting wires serve as a wire pair, and the buffer layer is coated outside the co-twisting of the wire pairs.

Further, adjacent pairs of wires have different pitches therebetween.

Further, the inner conductor is a single or a plurality of stranded copper conductors.

Further, the insulating layer is a layer of low dielectric constant silicon nitride coated between the inner conductor gate and the channel.

Further, the armor layer is a metal armor pipe, and the metal armor pipe is in close contact with the buffer layer.

Furthermore, the shielding layer is a braided structure of a plurality of parallel wound copper wires.

On the other hand, in order to achieve the above purpose, the invention also provides a processing method of the high-temperature-resistant signal transmission line, which comprises the above high-temperature-resistant signal transmission line, wherein the insulating layer is prepared by using hollow silicon nitride micro powder as a raw material and using silazane as an adhesive.

Compared with the prior art, the structure of the invention is described above, the invention winds the third layer with multiple layers of mica tapes and fixes the second layer, thereby not only increasing the flexibility of the transmission line, but also playing a role of buffering between the second layer and the fourth layer. Other advantageous effects of the present invention are explained in the detailed description.

Drawings

Fig. 1 is an embodiment of a high temperature-resistant signal transmission line according to the present invention.

Reference numerals shown in the drawings: 1. an inner conductor; 2. an insulating layer; 3. a buffer layer; 4. an armor layer; 5. and a shielding layer.

Detailed Description

The present invention will be described in detail below with reference to the attached drawings, and the technical solutions in the embodiments of the present invention will be clearly and completely described. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The high-temperature-resistant signal transmission line provided by the invention is mainly used for some key equipment, such as an engine in a high-temperature environment, the working temperature is higher, an accessory working cable is quickly aged, the electric leakage breakdown phenomenon is easy to occur, and the cable needs to be replaced and repaired within a fixed time.

Specifically, referring to fig. 1, the embodiment provides a high temperature resistant signal transmission line, which has a five-layer structure, and includes an inner conductor 1, an insulating layer 2, a buffer layer 3, an armor layer 4, and a shielding layer 5, which are sequentially arranged from inside to outside along a radial direction; the buffer layer 3 is internally coated on the insulating layer 2, and is externally wrapped with a plurality of layers of mica tapes, and the mica tapes are externally extruded with an armor layer 4.

The signal transmission line in the above-mentioned embodiment can resist temperature to 600 degrees centigrade at least, and the buffer layer 3 of third layer winds the package multilayer mica tape, plays the fixed action to the second layer, both can increase the crookedness of transmission line, still can play the cushioning effect between second layer and fourth layer.

Preferably, the inner conductor 1 is coated in the insulating layer 2 to serve as a conducting wire, a single conducting wire or a plurality of twisted conducting wires serve as a wire pair, and the buffer layer 3 is coated outside the co-twisting of the plurality of wire pairs.

When the transmission line is long and the influence of external interference is serious, the interference between the external is reduced by adopting the 'crossing' technology, namely, a single wire or a plurality of wires which are transmitted in parallel are mutually twisted according to certain compactness to form a wire pair, so that the mechanical strength of the transmission line can be improved, such as the bending property is improved, the tensile strength is improved, the size of the transmission line is reduced (core wires can be reasonably arranged by twisting), the flexibility is increased, and the corona phenomenon is improved.

In the above embodiment, when a plurality of conductor pairs are twisted into a pair, different twisting pitches may be set for each pair, so as to distinguish the magnetic field effect when each group of pairs is transmitted, and reduce the influence of crosstalk between adjacent pairs.

Preferably, the inner conductor 1 is a single or multiple stranded oxygen-free copper conductor.

Preferably, the insulating layer 2 is a layer of low dielectric constant silicon nitride coated between the gate and the channel of the inner conductor 1; when the insulating layer 2 adopts hollow silicon nitride micro powder as a raw material and silazane is used as a bonding agent to be prepared into silicon nitride, the silicon nitride insulating layer 2 has ultrahigh strength and wear resistance and low dielectric loss.

Preferably, the armor layer 4 is a metal steel strip armored pipe, and the metal steel strip armored pipe is in close contact with the buffer layer, so that the metal steel strip armored pipe can resist pressure, can limit the signal transmission line from being bent excessively, and plays a role in protection.

Preferably, the shielding layer 5 is a braided structure of a plurality of parallel wound copper wires, so that the effect of shielding signal interference can be enhanced.

The present application provides an embodiment of a manufacturing process, which comprises the following specific manufacturing processes: two wires are twisted together to form a single wire pair, the four wire pairs are twisted together, a buffer layer 3 with a buffering effect is wrapped outside the wire pair, then a plurality of layers of mica tapes are wrapped on one side of the buffer layer 3, a steel tape armoring pipe is in close contact with a third layer, and finally a copper wire shielding layer 5 with a shielding effect is utilized for weaving.

From a reading of the foregoing detailed description, it will be appreciated by those skilled in the art that the invention can be readily implemented. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the embodiments disclosed, a person skilled in the basic field can combine different technical features at will, thereby implementing different technical solutions. The present invention is not limited to the above embodiments, and any embodiments mentioned in the description fall within the scope of the present invention.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. The utility model provides a high temperature resistant signal transmission line, includes inner conductor (1), insulating layer (2), shielding layer (5), its characterized in that, signal transmission line still includes buffer layer (3), armor (4), cladding in insulating layer (2) in buffer layer (3), outer package has the multilayer mica tape, mica tape outband crowded package have armor (4), inner conductor (1), insulating layer (2), buffer layer (3), armor (4) and shielding layer (5) set up radially from inside to outside in proper order.

2. The high-temperature-resistant signal transmission line according to claim 1, wherein the insulating layer (2) is wrapped around the inner conductor (1) as a single conductor, a single conductor or a plurality of twisted pairs of conductors are used as a pair, and the buffer layer (3) is wrapped around the pair.

3. A high temperature resistant signal transmission line according to claim 2, wherein adjacent pairs of lines have different lay lengths.

4. A high temperature resistant signal transmission line according to claim 1, characterized in that said inner conductor (1) is a single or multiple stranded copper conductor.

5. A high-temperature-resistant signal transmission line according to claim 1, characterized in that the insulating layer (2) is a layer of low-k silicon nitride applied between the gate and the channel of the inner conductor (1).

6. A high temperature resistant signal transmission line according to claim 1, characterized in that the armouring layer (4) is a metal armouring pipe, which is in close contact with the buffer layer.

7. The high-temperature-resistant signal transmission line according to claim 1, wherein the shielding layer (5) is a multi-parallel copper wire braided structure.

8. A processing method of a high-temperature-resistant signal transmission line is characterized by comprising the high-temperature-resistant signal transmission line as claimed in any one of claims 1 to 7, wherein the insulating layer is prepared by using hollow silicon nitride micro powder as a raw material and using silazane as an adhesive.