CN214796800U - Flexible mineral insulated cable - Google Patents
Flexible mineral insulated cable Download PDFInfo
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- CN214796800U CN214796800U CN202121128792.2U CN202121128792U CN214796800U CN 214796800 U CN214796800 U CN 214796800U CN 202121128792 U CN202121128792 U CN 202121128792U CN 214796800 U CN214796800 U CN 214796800U
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Abstract
The utility model belongs to the technical field of the cable and specifically relates to a flexible mineral insulated cable is related to, it includes the main cable core, a plurality of vice cable cores and oversheath, week side from interior to exterior of main cable core has set gradually insulating sheath and inner sheath, be provided with a plurality of first bolster between insulating sheath and the inner sheath, the oversheath is located the periphery side of inner sheath, a plurality of vice cable cores are located between oversheath and the inner sheath, vice cable core is along the circumference interval distribution of inner sheath, week side of vice cable core is provided with fire-retardant sheath, be provided with the second bolster between two adjacent fire-retardant sheaths, week side of oversheath is provided with the crushing resistant layer. This application has the effect that improves the resistant distortion performance of cable through the distortion power that buffering oversheath, vice cable core and main cable core received, is favorable to improving the life of cable core, guarantees the transmission effect of signal and electric power.
Description
Technical Field
The application relates to the field of cables, in particular to a flexible mineral insulated cable.
Background
A cable is a single component formed by bonding, twisting or weaving two or more wires together to connect two devices for transmitting electrical signals, and the performance of the cable is gradually improved in the development of communication technology. The electric wire and cable has been developed from pure power transmission to multi-functionalization, i.e. new characteristics are respectively added according to different purposes, such as: flame retardant cables, fire resistant cables, low halogen low smoke cables, halogen free low smoke cables and the like.
The Chinese patent with the publication number of CN211427900U retrieved now discloses a flexible mineral insulated cable, which comprises a flexible mineral insulated cable body, the flexible mineral insulated cable body comprises a stranded conductor, the outer side of the stranded conductor is wrapped by a mineral insulating layer, the inner part of the flexible mineral insulated cable body is located at a position between the mineral insulating layers and is provided with a filler, the outer side of the flexible mineral insulated cable body is wrapped by a mineral fire-isolating layer, and the outer side of the mineral fire-isolating layer is wrapped by a protective sleeve.
In view of the above-mentioned related technologies, the inventor believes that the mineral fire barrier and the protective sheath play a role in double flame retardation, but the cable is affected by twisting force during use, so that the cable core inside the cable is easily crushed and cracked, the service life of the cable core is shortened, and the transmission effect of signals and power is affected.
SUMMERY OF THE UTILITY MODEL
In order to improve the problem that the cable is poor in twisting resistance, the application provides a flexible mineral insulated cable.
The application provides a flexible mineral insulated cable adopts following technical scheme:
flexible mineral insulated cable, including main cable core, a plurality of vice cable core and oversheath, week side from interior to exterior of main cable core has set gradually insulating sheath and inner sheath, insulating sheath with be provided with a plurality of first bolster between the inner sheath, the oversheath is located the periphery side of inner sheath, it is a plurality of vice cable core is located the oversheath with between the inner sheath, vice cable core follows the circumference interval distribution of inner sheath, week side of vice cable core is provided with fire-retardant sheath, adjacent two be provided with the second bolster between the fire-retardant sheath, week side of oversheath is provided with the crushing layer.
Through adopting above-mentioned technical scheme, when the cable receives the distortion power, utilize the resistance to compression layer to cushion the power that the oversheath received, second bolster between two adjacent vice cable cores prevents that two vice cable cores from extrudeing each other, cushion the distortion power that two adjacent vice cable cores received, a plurality of first bolsters prevent that vice cable core and main cable core from extrudeing each other, cushion the distortion power that the main cable core received, realize the effect that improves the resistant distortion performance of cable, be favorable to preventing insulating sheath and fire-retardant sheath by extrusion fracture, the life of improvement cable core, the transmission effect of assurance signal and electric power.
Optionally, the first buffer member includes an elliptical first buffer tube, and an extending direction of a minor axis of the elliptical cross section of the first buffer tube coincides with a radial direction of the main cable core.
Through adopting above-mentioned technical scheme, the inner sheath atress makes a plurality of first buffer tubes take place elastic deformation, and a plurality of first buffer tubes butt each other is favorable to further buffering torsional force to prevent that the main cable core from being extruded.
Optionally, the second buffer member includes an elliptical second buffer tube, and an extending direction of a major axis of the elliptical cross section of the second buffer tube coincides with a radial direction of the main cable core.
Through adopting above-mentioned technical scheme, when the cable received the torsional force, the second buffer tube had certain elastic deformation ability, prevented that two vice cable cores from extrudeing each other.
Optionally, the compression-resistant layer includes a plurality of curved compression-resistant strips, and is a plurality of the compression-resistant strips are along the circumference interval distribution of oversheath, just the both ends of compression-resistant strip all with oversheath fixed connection.
Through adopting above-mentioned technical scheme, when the cable received the distortion power, the resistance to compression strip takes place elastic deformation in order to cushion the atress of oversheath.
Optionally, the periphery of the outer sheath is provided with an insulating fire retardant sheath, the compression-resistant strips are located between the outer sheath and the insulating fire retardant sheath, and the protruding end of the arc-shaped surface of the compression-resistant strip is fixedly connected with the insulating fire retardant sheath.
Through adopting above-mentioned technical scheme, insulating back-fire relief sheath is fixed with the protruding end of the arcwall face of a plurality of anti layering, is favorable to the cable atress more even.
Optionally, a filler layer is disposed in a gap between the second buffer tube and the flame-retardant jacket.
By adopting the technical scheme, the roundness of the cable can be guaranteed by the filling layer, and the subsequent extrusion of the outer sheath can be facilitated.
Optionally, the main cable core with vice cable core forms by the transposition of many copper lines, many the week side of copper line has the mica tape around the package.
By adopting the technical scheme, the mica tape has excellent high temperature resistance and combustion resistance, is favorable for ensuring the roundness of the main cable core and the auxiliary cable core around the twisted copper wire, and is convenient for subsequent extrusion coating of the insulating sheath and the flame-retardant sheath.
Optionally, the compression resistant strip is made of a silicone rubber material added with an anti-aging agent.
By adopting the technical scheme, the silicon rubber material has good elasticity, the pressure reduction effect of the pressure-resistant strip on the outer sheath is favorably realized, the distortion resistance of the cable is improved, and the service life of the cable is favorably prolonged by adding the anti-aging agent into the silicon rubber material.
In summary, the present application includes at least one of the following beneficial technical effects:
1. utilize the resistance to compression layer to cushion the power that the oversheath received, utilize the distortion power that two adjacent vice cable cores of second buffer tube buffering received, utilize the distortion power that first buffer tube buffering main cable core received, realize improving the effect of the resistant distortion performance of cable, be favorable to preventing insulating cover and fire-retardant sheath by extrusion fracture, improve the life of cable core, guarantee the transmission effect of signal and electric power.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.
Description of reference numerals: 1. a main cable core; 2. a secondary cable core; 3. a copper wire; 4. mica tapes; 5. an insulating sheath; 6. a first buffer tube; 7. an inner sheath; 8. a flame retardant jacket; 9. a second buffer tube; 10. a filling layer; 11. an outer sheath; 12. anti-pressing strips; 13. insulating back-fire relief sheath.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
The embodiment of the application discloses flexible mineral insulated cable.
Referring to fig. 1, flexible mineral insulated cable, including main cable core 1, a plurality of vice cable core 2 and oversheath 11, main cable core 1 and vice cable core 2 are formed by 3 transposition of many copper lines, the week side of many copper lines 3 has wrapped mica tape 4, week side from interior to exterior of main cable core 1 has set gradually insulating sheath 5 and inner sheath 7, insulating sheath 5 and inner sheath 7 all adopt to have the polyolefin material crowded package that has the magnesium oxide to form, be provided with a plurality of first bolster between insulating sheath 5 and the inner sheath 7.
Referring to fig. 1, the outer sheath 11 is located on the outer periphery side of the inner sheath 7, the plurality of auxiliary cable cores 2 are located between the outer sheath 11 and the inner sheath 7, the number of the auxiliary cable cores 2 is six in the embodiment, the auxiliary cable cores 2 are distributed at equal intervals along the circumference of the inner sheath 7, the flame-retardant sheath 8 is arranged on the periphery side of the auxiliary cable cores 2, the flame-retardant sheath 8 and the outer sheath 11 are both formed by extruding polyolefin materials added with magnesium oxide, a second buffer member is arranged between every two adjacent flame-retardant sheaths 8, and a compression-resistant layer is arranged on the periphery side of the outer sheath 11.
When the cable receives the distortion power, utilize the resistance to compression layer buffering oversheath 11 to receive the power, second bolster between two adjacent vice cable cores 2 prevents that two vice cable cores 2 from extrudeing each other, thereby cushion the distortion power that two adjacent vice cable cores 2 received, a plurality of first bolsters prevent vice cable core 2 and main cable core 1 from extrudeing each other, thereby cushion the distortion power that main cable core 1 received, realize the effect that improves the resistant distortion performance of cable, be favorable to preventing insulating sheath 5 and fire-retardant sheath 8 from being extrudeed the fracture, improve the life of cable core, guarantee the transmission effect of signal and electric power.
The insulating sheath 5, the inner sheath 7, the flame-retardant sheath 8 and the outer sheath 11 are all made of polyolefin materials added with magnesium oxide, and have the characteristics of small relative density, corrosion resistance, good water resistance, high mechanical strength, good electrical insulation and the like.
Referring to fig. 1, in order to buffer the twisting force applied to the main cable core 1 and the sub-cable core 2, the first buffer material includes an elliptical first buffer tube 6, the first buffer tube 6 is made of a silicone rubber material to which an antioxidant is added, the plurality of first buffer tubes 6 surround the outer peripheral side of the insulating sheath 5 and abut against each other, and the extending direction of the minor axis of the elliptical cross section of the first buffer tube 6 coincides with the radial direction of the main cable core 1.
Referring to fig. 1, the second buffer member includes an elliptical second buffer tube 9, the second buffer tube 9 is made of a silicone rubber material added with an anti-aging agent, the second buffer tube 9 is positioned at the center of the two sub-cable cores 2, and the extending direction of the major axis of the elliptical cross section of the second buffer tube 9 coincides with the radial direction of the main cable core 1. A filling layer 10 is filled in a gap between the second buffer tube 9 and the flame-retardant sheath 8, and the filling layer 10 is made of polyethylene particles added with mica powder and magnesium oxide.
When the cable is subjected to a twisting force, the second buffer tube 9 has a certain elastic deformation capacity, and prevents the two sub-cable cores 2 from being extruded with each other, thereby buffering the twisting force between the two adjacent sub-cable cores 2 and facilitating the weakening of the force transmitted to the inner sheath 7. The 7 atress of inner sheath make a plurality of first buffer tubes 6 take place elastic deformation, and the mutual butt of a plurality of first buffer tubes 6 is favorable to further buffering distortion power to prevent that main cable core 1 from being extrudeed, realize buffering the effect of the distortion power that main cable core 1 and vice cable core 2 received.
The silicon rubber material has good elasticity, the decompression effect of the first buffer tube 6 and the second buffer tube 9 on the main cable core 1 and the auxiliary cable core 2 is favorably realized, the anti-twisting performance of the cable is improved, and the anti-aging agent is added into the silicon rubber material, so that the service life of the cable is favorably prolonged. The filling of the polyethylene particles is favorable for ensuring the roundness of the cable and facilitating the subsequent extrusion of the outer sheath 11, and the mica powder and the magnesium oxide are favorable for improving the fire-resistant and flame-retardant properties of the polyethylene particles and reducing the generation of toxic and corrosive gases.
Referring to fig. 1, in order to effectively buffer the force applied to the outer sheath 11, the compression-resistant layer includes a plurality of arc-shaped compression-resistant strips 12, the compression-resistant strips 12 are made of silicon rubber material added with an anti-aging agent, the plurality of compression-resistant strips 12 are distributed at equal intervals along the circumference of the outer sheath 11, and both ends of the compression-resistant strips 12 are fixedly connected with the outer sheath 11.
Referring to fig. 1, an insulating fire retardant sheath 13 is arranged on the peripheral side of the outer sheath 11, the insulating fire retardant sheath 13 is made of polyolefin material added with magnesium oxide, a plurality of pressure resistant strips 12 are positioned between the outer sheath 11 and the insulating fire retardant sheath 13, and the protruding ends of the arc-shaped surfaces of the pressure resistant strips 12 are fixedly connected with the insulating fire retardant sheath 13.
When the cable receives the distortion power, anti layering 12 takes place elastic deformation in order to cushion the atress of oversheath 11, and insulating back-fire relief sheath 13 is fixed with the protruding end of the arcwall face of a plurality of anti layering 12, is favorable to the cable atress more even, and insulating back-fire relief sheath 13 is favorable to improving the fire behaviour of cable, guarantees the circularity of cable.
The implementation principle of the embodiment of the application is as follows:
when the cable is subjected to twisting force, the anti-pressing strip 12 is subjected to elastic deformation to buffer the stress of the outer sheath 11, the second buffer tube 9 is subjected to elastic deformation to prevent the two auxiliary cable cores 2 from being extruded mutually, so that the twisting force between the two adjacent auxiliary cable cores 2 is buffered, and the stress of the inner sheath 7 is weakened. The 7 atress of inner sheath make a plurality of first buffer tubes 6 take place elastic deformation, and the mutual butt of a plurality of first buffer tubes 6 is favorable to further buffering distortion power to prevent that main cable core 1 from being extrudeed, realize buffering the effect of the distortion power that main cable core 1 and vice cable core 2 received, improve the resistant distortion performance of cable promptly.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A flexible mineral-insulated cable characterized by: including main cable core (1), a plurality of vice cable core (2) and oversheath (11), week side from interior to exterior of main cable core (1) has set gradually insulating sheath (5) and inner sheath (7), insulating sheath (5) with be provided with a plurality of first bolster between inner sheath (7), oversheath (11) are located the periphery side of inner sheath (7), it is a plurality of vice cable core (2) are located oversheath (11) with between inner sheath (7), vice cable core (2) are followed the circumference interval distribution of inner sheath (7), week side of vice cable core (2) is provided with fire-retardant sheath (8), adjacent two be provided with the second bolster between fire-retardant sheath (8), week side of oversheath (11) is provided with the crushing layer.
2. A flexible mineral-insulated cable according to claim 1, characterized in that: the first buffer element comprises an elliptical first buffer tube (6), the direction of extension of the minor axis of the elliptical cross-section of the first buffer tube (6) coinciding with the radial direction of the main cable core (1).
3. A flexible mineral-insulated cable according to claim 1, characterized in that: the second buffer element comprises an oval second buffer tube (9), the extension direction of the major axis of the oval cross section of the second buffer tube (9) coincides with the radial direction of the main cable core (1).
4. A flexible mineral-insulated cable according to claim 1, characterized in that: the compression-resistant layer comprises a plurality of arc-shaped compression-resistant strips (12), the compression-resistant strips (12) are distributed along the circumferential direction of the outer sheath (11) at intervals, and two ends of each compression-resistant strip (12) are fixedly connected with the outer sheath (11).
5. Flexible mineral-insulated cable according to claim 4, characterized in that: the side of oversheath (11) is provided with insulating back-fire relief sheath (13), and is a plurality of anti layering (12) are located oversheath (11) with between insulating back-fire relief sheath (13), the overhang of the arcwall face of anti layering (12) with insulating back-fire relief sheath (13) fixed connection.
6. A flexible mineral-insulated cable according to claim 3, characterized in that: a filling layer (10) is arranged in the gap between the second buffer tube (9) and the flame-retardant sheath (8).
7. A flexible mineral-insulated cable according to claim 1, characterized in that: main cable core (1) with vice cable core (2) are formed by many copper lines (3) transposition, many the week side of copper line (3) is wrapped there is mica tape (4).
8. Flexible mineral-insulated cable according to claim 4, characterized in that: the anti-compression strip (12) is made of a silicon rubber material added with an anti-aging agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121128792.2U CN214796800U (en) | 2021-05-25 | 2021-05-25 | Flexible mineral insulated cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121128792.2U CN214796800U (en) | 2021-05-25 | 2021-05-25 | Flexible mineral insulated cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214796800U true CN214796800U (en) | 2021-11-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121128792.2U Active CN214796800U (en) | 2021-05-25 | 2021-05-25 | Flexible mineral insulated cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214796800U (en) |
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2021
- 2021-05-25 CN CN202121128792.2U patent/CN214796800U/en active Active
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