CN219392996U - Semi-hard cable - Google Patents

Abstract

The application discloses a semi-hard cable, which relates to the technical field of cables and comprises an inner conductor, an insulator and a tubular outer conductor which are coaxially arranged from inside to outside in sequence; the insulator comprises an insulating solid layer and an insulating expansion layer; the insulating entity layer is coated outside the inner conductor; the insulating expansion layer is coated outside the insulating entity layer. The combined design of the insulating entity layer and the insulating expansion body layer ensures that the internal structure of the cable can be well kept stable when the cable bears mechanical stress such as repeated bending, torsion or shaping in the process of assembly and long-term use, so that the long-term stable shaping shape can be better kept, the insulating dielectric constant can be reduced, the dielectric loss can be reduced, and better phase consistency can be realized. Furthermore, the outer conductor is designed into a semi-hard tubular structure, and can play roles of mechanical reinforcement and high electromagnetic shielding. In general, the cable has the advantages of stable shape, excellent shaping effect, lower loss and higher power, and simultaneously has good mechanical property and insulation protection property.

Description

Semi-hard cable

Technical Field

The application relates to the technical field of cables, in particular to a semi-rigid cable.

Background

With the development of communication technology and the application demands of a cryogenic environment, in miniaturized equipment and systems with frequent movement, such as high-frequency and ultrahigh-frequency electronic devices with high current and strong magnetic field technologies, in occasions with high rigidity requirements, higher requirements are further put on the stability and reliability of cable application, and the cable is required to keep stable in shape, excellent in shaping effect, lower in loss and higher in power, and meanwhile, has good mechanical performance and insulation protection performance, but the current cable still cannot well meet the requirements.

Disclosure of Invention

In view of this, the object of the present application is to provide a semi-rigid cable to meet the higher requirements of shape stability, excellent sizing effect, lower losses, higher power, at the same time good mechanical properties and insulation protection properties.

To achieve the above technical object, the present application provides a semi-hard cable, including an inner conductor, an insulator and an outer conductor in a tubular shape coaxially arranged in this order from inside to outside;

the insulator comprises an insulating entity layer and an insulating expansion layer;

the insulating entity layer is coated outside the inner conductor;

the insulating expansion layer is coated outside the insulating entity layer.

Further, the inner conductor and the outer conductor are both made of superconducting materials.

Further, the inner conductor is one of a niobium-titanium alloy superconductor, a copper-nickel alloy superconductor, a stainless steel superconductor and a beryllium-copper superconductor.

Further, the outer conductor is one of a niobium-titanium alloy copper superconductor, a copper-nickel alloy superconductor and a stainless steel superconductor.

Further, the insulating solid layer is prepared from a tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.

Further, the thickness of the insulating solid layer is 0.1 mm-0.5 mm.

Further, the insulating expansion layer is formed by wrapping polytetrafluoroethylene tape.

Further, the insulating bulk layer is at least two layers.

Further, the overlap ratio of each insulating expansion layer is more than or equal to 50 percent.

Further, the thickness of the swelling tape of the insulating swelling layer is 0.05 mm-0.25 mm.

According to the technical scheme, the insulator is designed into the insulating entity layer and the insulating expansion body layer, the insulating entity layer has better adhesion property, the adhesion force between the inner conductor and the insulator can be effectively improved, the cable with the insulator structure design can well keep stable when being subjected to mechanical stress such as repeated bending, torsion or shaping in the process of assembly and long-term use, the internal structure of the cable can better keep stable in the process of bearing mechanical stress such as repeated bending, torsion or shaping, and further better keep stable shaping in the long-term process, meanwhile, the insulating expansion body layer structure with an air gap is utilized, the insulating dielectric constant can be reduced, the dielectric loss is reduced, and better temperature and mechanical phase consistency can be realized, so that the cable can be better applied to a complete system with high requirements on amplitude phase consistency. Furthermore, the outer conductor is designed into a semi-hard tubular structure, and can play roles of mechanical reinforcement and high electromagnetic shielding.

In general, the cable of this design of this application has stable in shape, design effect is excellent, the loss is lower, power is higher, has good mechanical properties and insulating protection performance simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a perspective view of a semi-hard cable provided in the present application when both an inner conductor and an outer conductor are made of niobium-titanium alloy materials;

fig. 2 is a perspective view of a semi-hard cable provided in the present application when both the inner conductor and the outer conductor are made of a non-niobium titanium alloy material;

fig. 3a is a front view of an inner conductor made of a niobium-titanium alloy material for a semi-hard cable provided in the present application;

FIG. 3b is a front view of an inner conductor made of a semi-hard cable non-niobium titanium alloy material provided in the present application;

fig. 3c is a front view of an outer conductor made of a niobium-titanium alloy material for a semi-hard cable provided in the present application;

FIG. 3d is a front view of an outer conductor made of a semi-hard cable non-niobium titanium alloy material provided in the present application;

in the figure: 1. an inner conductor; 2. an insulator; 21. an insulating physical layer; 22. an insulating bulk layer; 3. an outer conductor.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the embodiments of the present application, are within the scope of the embodiments of the present application.

In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, interchangeably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the terms in the embodiments of the present application will be understood by those of ordinary skill in the art in a specific context.

The embodiment of the application discloses a semi-hard cable.

Referring to fig. 1, one embodiment of a semi-hard cable provided in an embodiment of the present application includes:

an inner conductor 1, an insulator 2 and a tubular outer conductor 3 are coaxially arranged from inside to outside. The outer conductor 3 is designed into a semi-hard tubular structure, and can play a role in mechanical reinforcement and high electromagnetic shielding.

The insulator 2 includes an insulating solid layer 21 and an insulating bulk layer 22, the insulating solid layer 21 is coated on the inner conductor 1, and the insulating bulk layer 22 is coated on the insulating solid layer 21. The design of the insulating solid layer 21 has better adhesion characteristics, can effectively improve the adhesion between the inner conductor 1 and the insulator 2, and the cable with the structural design of the insulator 2 can well keep stable internal structure when being subjected to mechanical stress such as repeated bending, torsion or shaping in the process of assembly and long-term use, thereby better keeping the shaping shape stable for a long time.

Meanwhile, compared with the traditional foaming layer design, the insulating expansion layer 22 structure with the air gap can further reduce the insulating dielectric constant, reduce the dielectric loss, and realize better temperature and mechanical phase consistency, so that the cable can be better applied to the whole system with high requirements on amplitude-phase consistency, and transmission application scenes of the parts needing to be moved, such as communication, warning, guidance, navigation, electronic countermeasure and the like. The insulating bulk layer 22 is formed by wrapping a bulk tape.

The cable of this design of this application has stable in shape, design effect is excellent, the loss is lower, the power is higher, simultaneously has good mechanical properties and insulating protection performance, has solved traditional flexible cable or half flexible cable in long-term assembly shape stability, vibration resistance and shock resistance and the not enough problem of durability, its application stability and reliability are better, specially adapted medical nuclear magnetic resonance, major scientific device, national defense equipment, new energy, high frequency and the ultrahigh frequency electron device of magnetic resonance imaging appearance etc. heavy current, strong magnetic field technique.

The foregoing is a first embodiment of a semi-hard cable provided in the embodiments of the present application, and the following is a second embodiment of a semi-hard cable provided in the embodiments of the present application, refer to fig. 1 to fig. 2, and fig. 3a to fig. 3d.

Based on the scheme of the first embodiment:

further, both the inner conductor 1 and the outer conductor 3 are made of superconducting materials. The inner conductor 1 and the outer conductor 3 are made of superconductor materials, have zero resistance characteristic when being cooled to a critical temperature and enter a superconducting state, have little conductive loss, and are particularly suitable for being applied to the field of superconducting transmission with high rigidity requirements.

Further, the inner conductor 1 may be one of a niobium-titanium alloy superconductor, a copper-nickel alloy superconductor, a stainless steel superconductor, and a beryllium-copper superconductor. The resistance is zero when in the superconducting state, and signal energy can be transmitted without loss. The niobium-titanium alloy superconductor is preferably selected, pure copper is adopted as a matrix material, and a multi-strand niobium-titanium thin core is embedded into the niobium-titanium thin core composite multi-core superconductor material, so that the niobium-titanium alloy superconductor has good superconducting performance, and can bear very high current transmission capacity and signal transmission energy under a strong magnetic field. Of course, those skilled in the art can select other superconducting materials for preparation as desired.

Further, the outer conductor 3 is a smooth metal tube drawn to a desired outer diameter via a die, specifically one of a niobium-titanium alloy copper superconductor, a copper-nickel alloy superconductor, and a stainless steel superconductor. Namely one of a niobium-titanium alloy copper superconducting pipe, a copper-nickel alloy superconducting pipe and a stainless steel superconducting pipe. Compared with the flexible and semi-flexible outer conductor 3 cable, the cable with the semi-rigid tubular outer conductor 3 has the characteristics of good shaping effect, excellent vibration resistance and impact resistance, high shielding performance and reliability and the like in the processes of assembly and connection and use. Meanwhile, the outer conductor 3 prepared from the superconductor material has zero resistance characteristic when being cooled to a critical temperature and enters a superconducting state, and the product loss is low.

Further, the insulating solid layer 21 is preferably made of a tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer. Specifically, an insulating solid layer 21 is formed by pushing a tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer outside an inner conductor 1, and the insulating solid layer 21 prepared from the tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer material has excellent heat resistance and adhesion characteristics.

Further, the thickness of the insulating solid layer 21 is preferably 0.1mm to 0.5mm. The thickness design can better play a role of tightly adhering to the inner conductor 1 and the insulating expansion layer 22, and can effectively improve the adhesive force between the inner conductor 1 and the insulating expansion layer 22, so that the structures of the inner conductor 1 and the insulating expansion layer 22 are kept stable mutually when being subjected to mechanical force, meanwhile, the stable transmission of high-frequency signals is ensured, moisture is prevented from entering, and the long-term service life of the cable is prolonged.

Further, the insulating and swelling layer 22 is preferably formed by wrapping a polytetrafluoroethylene tape, that is, the swelling tape of the insulating and swelling layer 22 is a polytetrafluoroethylene tape, and specifically, the insulating and swelling layer 22 is formed by wrapping a low-density polytetrafluoroethylene swelling tape with air gaps outside the insulating and swelling layer 21.

Further, the insulating and swelling layer 22 is preferably at least two layers, and the overlap ratio of each insulating and swelling layer 22 is more than or equal to 50% in the case of a multi-layer wrapping design. In the case of the wrapping design of the low-density polytetrafluoroethylene bulked tape, the number of wrapping layers is determined according to the cable structure and the process stability, and the number of the wrapping layers is at least two. When the overlap ratio is lower than 50%, the single-layer positions of the inner and outer wrapping layers may overlap, so that the actual places are four layers, the places are two layers, the places which are not completely overlapped are easy to cause insulation flashover breakdown, insulation voltage failure, insulation roundness is poor, when the cable is subjected to mechanical force such as bending force and torsion force, the cable can cause dimensional change and structural variation dislocation, and electrical length change is caused, so that phase change is caused.

Further, the thickness of the bulk tape of the insulating bulk layer 22 is preferably 0.05mm to 0.25mm. The swelling body is provided with a special fibrous microporous structure, the thickness of the swelling body is selected according to the diameter of an insulating wire and the wrapping mode, the thickness of the swelling body is preferably 0.05-0.25 mm, the swelling body with the thickness range is used for wrapping, and a uniform insulating swelling body layer 22 with stable size and dielectric constant can be obtained, so that the insulating solid layer 21 and the outer conductor 3 structure keep stable mutually when being mechanically stressed, and the insulating solid layer has the advantages of low dielectric loss, low dielectric constant and stable structure.

In this application, insulating solid layer 21 and insulating bulk layer 22 are fluoroplastic material, through pushing sintering, around the package technology, do not have air gap between insulating solid layer 21 and the insulating bulk layer 22 and be connected, use the cable that has this insulating body 2 structural design in assembly and long-term use, when it bears mechanical stress such as bending repeatedly, torsion or design, cable inner structure can keep very stable, keep stable design shape for a long time better, insulating dielectric constant is lower simultaneously, dielectric loss is less.

While a semi-rigid cable provided in the present application has been described in detail, those skilled in the art will recognize that there are variations in the embodiments and application scope of the present application based on the ideas of the embodiments of the present application, and the present application should not be construed as limited to the above descriptions.

Claims (10)

1. A semi-hard cable, which is characterized by comprising an inner conductor (1), an insulator (2) and a tubular outer conductor (3) which are coaxially arranged from inside to outside in sequence;

the insulator (2) comprises an insulating solid layer (21) and an insulating swelling layer (22);

the insulating entity layer (21) is coated outside the inner conductor (1);

the insulating expansion layer (22) is coated outside the insulating entity layer (21).

2. A semi-rigid cable according to claim 1, characterized in that the inner conductor (1) and the outer conductor (3) are both made of superconducting material.

3. A semi-rigid cable according to claim 2, wherein the inner conductor (1) is one of a niobium-titanium alloy superconductor, a copper-nickel alloy superconductor, a stainless steel superconductor and a beryllium-copper superconductor.

4. A semi-rigid cable according to claim 2, wherein the outer conductor (3) is one of a niobium-titanium alloy copper superconductor, a copper-nickel alloy superconductor, and a stainless steel superconductor.

5. A semi-rigid cable according to claim 1, wherein the insulating solid layer (21) is made of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.

6. A semi-rigid cable according to claim 1, wherein the thickness of the insulating solid layer (21) is between 0.1mm and 0.5mm.

7. A semi-rigid cable according to claim 1, wherein said insulating and texturizing layer (22) is formed by a polytetrafluoroethylene tape wrap.

8. A semi-rigid cable according to claim 1, wherein said insulating bulk layer (22) is at least two layers.

9. A semi-rigid cable according to claim 8, wherein the overlap of each insulating and texturizing layer (22) is greater than or equal to 50%.

10. A semi-rigid cable according to claim 1, wherein the insulating texturizing layer (22) has a texturizing tape thickness of 0.05mm to 0.25mm.