CN207458665U - Railway digital signal cable cracking resistance insulated single wire - Google Patents
Railway digital signal cable cracking resistance insulated single wire Download PDFInfo
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- CN207458665U CN207458665U CN201720893651.7U CN201720893651U CN207458665U CN 207458665 U CN207458665 U CN 207458665U CN 201720893651 U CN201720893651 U CN 201720893651U CN 207458665 U CN207458665 U CN 207458665U
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- crust
- holdfast
- exodermis
- cracking resistance
- single wire
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Abstract
The utility model discloses a kind of railway digital signal cable cracking resistance insulated single wires, including conductor, and endodermis, foaming layer and exodermis on conductor are coated on successively, the medial surface of the exodermis is provided with the crust holdfast for stretching into foaming layer, and the height of the crust holdfast is 1/3-the 1/2 of depth of foam.4-10 crust holdfasts are equipped on the same section of the exodermis, adjacent two have the section of crust holdfast at a distance of 3 millimeters-6 millimeters.The railway digital signal cable cracking resistance insulated single wire of the utility model can effectively inhibit insulation sheath cracking, and simple and reasonable.
Description
Technical field
The utility model is related to skin-foam-skin insulation single lines in railway signal cable more particularly to railway signal cable.
Background technology
Railway signal control cable is the key position in relation to equipment and control device in connection railway signal system, is used for
Transmit railway signal, audio signal, digital signal and electric energy.As high-speed railway enters digitlization, intelligence and synthesization
Development track, railway digital signal cable improve the synthesis of cable on the basis of original railway signal cable index is met
Electric property, capacitance index reduce 40%, and insulation resistance index improves 2.3 times, while improves impedance, attenuation and cross-talk
Etc. performances.
In order to reduce the mutual capacitance of railway digital signal cable, reduction decays, and extends transmission distance, railway digital signal
The insulating layer of cable insulation single line mostly uses the three-layer insulated structure of skin foam skin.The main function of its endodermis be make conductor and absolutely
Edge layer is combined more securely with protection copper conductor, and the effect of single line exodermis is then the mechanical strength for enhancing single line, makes insulation meter
Face is smooth and wear-resisting.Existing single line exodermis has that being easy to tableization can split, especially under the action of environmental stress
Surface is present with cracking, and the insulated single wire exodermis to crack not only influences the mechanical strength and surface flatness of insulated single wire,
Coaxial capacitance, concentricity and the ovality of insulated single wire but will be influenced, then influences the electrical property of cable, this is to high-speed electrified
Railway is not allowed with digital signal cable.
Utility model content
For the above-mentioned deficiency present in the prior art, the technical problem to be solved by the utility model is to provide a kind of energy
It is enough effectively to inhibit insulation sheath cracking, simple and reasonable railway digital signal cable cracking resistance insulated single wire.
In order to solve the above-mentioned technical problem, a kind of railway digital signal cable of the utility model cracking resistance insulate single
Line, endodermis, foaming layer and the exodermis being coated on including conductor and successively on conductor, the medial surface of the exodermis are set
The crust holdfast for stretching into foaming layer is equipped with, the height of the crust holdfast is 1/3-the 1/2 of depth of foam.
With the above structure, the crust holdfast of foaming layer, the crust are stretched into due to being provided in the medial surface of exodermis
Holdfast strengthens exodermis and the binding strength of foaming layer, and in the three-layer insulated structure of skin foam skin, exodermis is with respect to foaming layer
Thinner thickness, exodermis and foaming layer are combined closely, and it is strong not only to effectively enhance the machinery such as tension, resistance to compression of insulated single wire
Degree, but also the cracking of the cortex caused by structural stress and environmental stress is restrained effectively, and the cracking of exodermis was both tight
Ghost image rings the mechanical strength of insulated single wire and cortical surface smoothness, and can directly affect the concentricity and ellipse of insulated single wire
Degree, thus it is substantially excellent with higher single line mechanical strength and lower coaxial capacitance, electrical property using the utility model structure
In existing insulated single wire, and due to controlling the length of crust holdfast between 1/3-the 1/2 of depth of foam, both had compared with
High binding strength, the structural strength without influencing insulating layer and foaming layer.The utility model also have it is simple and reasonable,
Convenient for extrusion moulding.
The preferred embodiment of the utility model is equipped with 4-10 crust holdfasts on the same section of the exodermis,
Adjacent two have the section of crust holdfast at a distance of 3 millimeters -6 millimeters.The structure both ensure that the combination between single line insulating layer circumferential direction
Fastness in turn ensures the binding strength of single line insulating layer length direction.
The preferred embodiment of the utility model, the same section of exodermis are equipped with 6 or 8 crust holdfasts.Tool
There is rational single line insulating layer circumferential direction binding strength, and convenient for making processing.
The further embodiment of the utility model, the crust holdfast and exodermis are connected as a single entity.The exodermis and
Crust holdfast is formed by thermoplasticity EP rubbers extrusion molding.Binding strength is high, extrusion moulding is convenient.
The utility model further embodiment, the crust holdfast are in conical structure, and the coning angle of the crust holdfast is
20°—40°.Not only the firm connection of foaming layer and crust interlayer had been ensured, but also convenient for making production.
Description of the drawings
It is insulated with reference to the accompanying drawings and detailed description to the utility model railway digital signal cable with cracking resistance single
Line is described in further detail.
Fig. 1 is a kind of sectional drawing of specific embodiment of the utility model railway digital signal cable cracking resistance insulated single wire
Structure diagram.
In figure, 1-conductor, 2-endodermis, 3-foaming layer, 4-exodermis, 5-crust holdfast.
Specific embodiment
For railway digital signal cable shown in Fig. 1 in cracking resistance insulated single wire, which includes conductor 1, leads
Body 1 is the pulling brass wire of 1.0 millimeters of diameter.There is endodermis 2 in 1 outer extrusion molding of conductor, the endodermis 2 is using low density polyethylene (LDPE) as material
Material, the thickness of endodermis 2 is 0.05 millimeter.On endodermis 2 foaming layer 3, foaming layer 3 are extruded in the method for physical blowing
Material for physical blowing polyolefin material, be with the addition of nucleating agent within this material, the thickness of foaming layer 3 is 0.85 millimeter.
It is extruded in foaming layer 3 with thermoplasticity EP rubbers into exodermis 4, the thickness of exodermis 4 is 0.10 millimeter.In exodermis 4
Inside be provided with 8 crust holdfasts 5 for stretching into foaming layer 3, which uses similary material and company with exodermis 4
It is integrated, i.e., extrudes to form exodermis 4 and crust holdfast 5 thereon simultaneously with thermoplasticity EP rubbers.Exodermis 4 has holdfast
Same section on crust holdfast quantity should control at 4-10, the crust holdfast quantity on preferably same section should be 6
It is a or 8.Two adjacent sections with crust holdfast 5 are at a distance of 4 millimeters along insulated single wire length direction.Preferably,
The two neighboring cross-sectional distance with holdfast should be controlled between 3 millimeters -6 millimeters.Crust holdfast 5 is in conical structure, crust anchor
The coning angle of nail 5 is 30 °, angle of the coning angle between two busbares of the shaft section of circular cone.The preferred angle of the coning angle
Angle value is 20 ° -40 °.Height in the crust holdfast 5 of conical structure is 0.35 millimeter, it is contemplated that is firmly combined between cortex and absolutely
The mechanical strength of edge layer, the height of crust holdfast 5 should be preferably chosen as between 1/3-the 1/2 of 3 thickness of foaming layer.
Above-mentioned some preferred embodiments for having enumerated the utility model, but the utility model is not limited thereto, not
In the case of running counter to the utility model basic principle, it can also make improvements and convert, if crust holdfast is in addition in conical structure, also
Can be the structures such as cylindric or prism-shaped or pyramid-shaped.
Claims (6)
1. a kind of railway digital signal cable cracking resistance insulated single wire, including conductor（1）And conductor is coated on successively（1）
On endodermis（2）, foaming layer（3）And exodermis（4）, it is characterised in that：The exodermis（4）Medial surface be provided with and stretch into
Foaming layer（3）Crust holdfast（5）, the crust holdfast（5）Height be foaming layer（3）1/3-the 1/2 of thickness.
2. cracking resistance insulated single wire according to claim 1, it is characterised in that：In the exodermis（4）Same section
It is equipped with 4-10 crust holdfasts（5）, adjacent two have crust holdfast（5）Section at a distance of 3 millimeters -6 millimeters.
3. cracking resistance insulated single wire according to claim 1, it is characterised in that：The exodermis（4）It is set on same section
There are 6 or 8 crust holdfasts（5）.
4. cracking resistance insulated single wire according to claim 1, it is characterised in that：The crust holdfast（5）And exodermis（4）
It is connected as a single entity.
5. cracking resistance insulated single wire according to claim 4, it is characterised in that：The exodermis（4）With crust holdfast（5）
It is formed by thermoplasticity EP rubbers extrusion molding.
6. according to claim 1-5 any one of them cracking resistance insulated single wire, it is characterised in that：The crust holdfast（5）It is in
Conical structure, the crust holdfast（5）Coning angle be 20 ° -40 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720893651.7U CN207458665U (en) | 2017-07-22 | 2017-07-22 | Railway digital signal cable cracking resistance insulated single wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720893651.7U CN207458665U (en) | 2017-07-22 | 2017-07-22 | Railway digital signal cable cracking resistance insulated single wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207458665U true CN207458665U (en) | 2018-06-05 |
Family
ID=62248844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720893651.7U Active CN207458665U (en) | 2017-07-22 | 2017-07-22 | Railway digital signal cable cracking resistance insulated single wire |
Country Status (1)
| Country | Link |
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| CN (1) | CN207458665U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289129A (en) * | 2019-06-20 | 2019-09-27 | 深圳市东景盛电子技术有限公司 | A kind of optical cable |
| CN112927849A (en) * | 2021-01-25 | 2021-06-08 | 浙江德通科技有限公司 | Flexible low-attenuation smooth aluminum flame-retardant coaxial cable for communication |
-
2017
- 2017-07-22 CN CN201720893651.7U patent/CN207458665U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289129A (en) * | 2019-06-20 | 2019-09-27 | 深圳市东景盛电子技术有限公司 | A kind of optical cable |
| CN112927849A (en) * | 2021-01-25 | 2021-06-08 | 浙江德通科技有限公司 | Flexible low-attenuation smooth aluminum flame-retardant coaxial cable for communication |
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