CN108133781B - High temperature resistant shielding layer power cable - Google Patents
High temperature resistant shielding layer power cable Download PDFInfo
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- CN108133781B CN108133781B CN201711364674.XA CN201711364674A CN108133781B CN 108133781 B CN108133781 B CN 108133781B CN 201711364674 A CN201711364674 A CN 201711364674A CN 108133781 B CN108133781 B CN 108133781B
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- cable
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- plated copper
- layer
- shielding layer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1805—Protections not provided for in groups H01B7/182 - H01B7/26
- H01B7/181—Protections not provided for in groups H01B7/182 - H01B7/26 composed of beads or rings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1805—Protections not provided for in groups H01B7/182 - H01B7/26
- H01B7/1815—Protections not provided for in groups H01B7/182 - H01B7/26 composed of longitudinal inserts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/184—Sheaths comprising grooves, ribs or other projections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/024—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of braided metal wire
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- Insulated Conductors (AREA)
Abstract
The invention discloses a high-temperature-resistant shielding layer electric power cable which sequentially comprises a cable core, a crosslinked polyethylene insulating layer, a shielding layer and a sheath layer from inside to outside. The cable can quickly solve the problem of the fold of the shielding layer; due to the fact that the ceramic ring is used, a good structural effect is achieved, the ceramic ring has a supporting effect, the silver-plated copper braided belt is just located in a gap formed after the silver-plated copper braided belt is supported, negative effects caused by compression are unlikely to occur, even if wrinkles appear on the surface of the silver-plated copper braided belt and the shielding effect is poor, the silver-plated copper braided belt can be quickly adjusted back, the ceramic ring is mainly driven by a cable when the cable is bent, the silver-plated copper braided belt is fixed by the ceramic ring, and therefore the silver-plated copper braided belt can be stretched by twisting of the ceramic ring, and the wrinkles are quickly eliminated.
Description
Technical Field
The invention relates to the technical field of cable processes in modern communication, in particular to a high-temperature-resistant shielding layer power cable.
Background
The effect of power cable shielding layer, the electric current that the power cable passed through is great, can produce magnetic field around the electric current, for not influencing other component, adds the shielding layer and can be this kind of electromagnetic shield in the cable, and the shielding layer of cable can play certain ground protection effect simultaneously, if the cable heart yearn takes place the damage, the electric current that exposes out can be in the same direction as shielding layer and flow into the earth mat. There are several categories of power cable conductor shields: the aluminum foil shielding layer, the copper mesh shielding layer and the tinned copper mesh shielding layer are arranged, and the effect is enhanced along with the increase of the weaving density and the number of layers.
In a conventional shielded cable, a braided shield made of a plurality of shield wires is provided around a signal line to reduce the influence of electromagnetic waves coming from the outside. However, with the increase in signal transmission speed of electronic equipment or the like as a source of external electromagnetic waves, there is a possibility that external electromagnetic waves in a high frequency band may reach a signal line through a gap existing between shield wire members. Therefore, by further winding the shield tape, the gap existing between the shield wires is blocked, thereby preventing external electromagnetic waves in the high frequency band from reaching the signal line through the gap existing between the shield wires.
Meanwhile, the conductor of the cable is formed by twisting a plurality of strands of wires, an air gap is easily formed between the conductor and the insulation, the surface of the conductor is not smooth, an electric field is concentrated, the cable is often required to be bent and extruded in the actual use process, the non-uniform distribution of a shielding layer network is often caused, when the power cable is bent, the shielding layer is propped open by the arching of an inner core of the cable, and then when the cable recovers a straight line, a gap is remained in the net-shaped wiring of the shielding layer; likewise, squeezing the cable causes the same problem: even if the cable core is not affected by bending when the cable core is restored to the original state, the shielding layer is difficult to restore to the original state, and a partial discharge phenomenon is formed between the conductor and the insulating layer.
The invention mainly aims to solve the problem that the power cable can be freely stretched in the cable, so that the network-shaped shielding layer of the power cable is restored to the original state, and the generation of air gaps in the shielding layer of the cable is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the power cable which can realize the free stretching of the shielding braided belt, prevent the generation of gaps of a wrinkling machine of a shielding layer and improve the shielding effect.
The invention solves the technical problems through the following technical means:
a high-temperature-resistant shielding layer electric power cable comprises a wire core, a cross-linked polyethylene insulating layer, a shielding layer and a sheath layer from inside to outside in sequence;
the shielding layer comprises a plurality of ceramic rings, silver-plated copper braided belts and heat insulation materials; the ceramic rings are arranged along the axis direction of the cable and extend all over the cable, the insulating layer and the sheath layer are separated by the ceramic rings, and a gap is formed between the insulating layer and the sheath layer; the inner side of the ring of the ceramic ring is embedded in the crosslinked polyethylene insulating layer, and the outer side of the ring of the ceramic ring is embedded in the sheath layer; a silver-plated copper braided belt is arranged in the gap, the silver-plated copper braided belt wraps the whole cable, and the part of the silver-plated copper braided belt penetrating through the ceramic ring is fixed on the ceramic ring; other residual spaces in the gap are filled with heat insulation materials;
the heat insulation material is composed of the following raw materials in parts by weight: 30-40 parts of quartz stone powder, 15-20 parts of carbon powder and 10-15 parts of glass fiber.
Preferably, the wire core comprises a plurality of wires, and the surfaces of the wires are wrapped by insulating skins; the wire core further comprises a plurality of strip-shaped plastic ribs which are uniformly distributed on the outer sides of the plurality of wires.
Preferably, the outer surface of the sheath layer is uniformly provided with a plurality of annular grooves, and the annular grooves are triangular on the cross section of the cable shaft.
Preferably, solid lubricating oil is uniformly coated on the inner walls of the two sides of the annular groove.
Preferably, the outer surface of the sheath layer is bonded with a layer of asbestos cloth.
The invention has the advantages that: the cable can quickly solve the problem of the fold of the shielding layer; due to the fact that the ceramic ring is used, a good structural effect is achieved, the ceramic ring has a supporting effect, the silver-plated copper braided belt is just located in a gap formed after the silver-plated copper braided belt is supported, negative effects caused by compression are unlikely to occur, even if wrinkles appear on the surface of the silver-plated copper braided belt and the shielding effect is poor, the silver-plated copper braided belt can be quickly adjusted back, the ceramic ring is mainly driven by a cable when the cable is bent, the silver-plated copper braided belt is fixed by the ceramic ring, and therefore the silver-plated copper braided belt can be stretched by twisting of the ceramic ring, and the wrinkles are quickly eliminated.
Furthermore, the thermal insulation material that fills in the gap that forms between restrictive coating and the insulating layer, not having fine effect to thermal-insulated, be one deck lubricating layer simultaneously, when the tensile silver-plated copper braid of pottery ring of being convenient for, silver-plated copper braid can very easy free shrink.
Drawings
FIG. 1 is a schematic axial cross-sectional view of a cable according to the present invention.
Fig. 2 is a cross-sectional structural schematic view of the cable of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
As shown in fig. 1: a high-temperature-resistant shielding layer electric power cable comprises a wire core 1, a crosslinked polyethylene insulating layer 2, a shielding layer 3 and a sheath layer 4 from inside to outside in sequence; the shielding layer 3 comprises a plurality of ceramic rings 31, silver-plated copper braided belts 32 and heat insulation materials 30; the ceramic material is formed by sintering ceramic raw materials, the ceramic rings 31 are arranged and extend along the axial direction of the cable and are distributed on the whole cable, the ceramic rings 31 separate the insulating layer 2 from the sheath layer 4, and a gap is formed between the insulating layer 2 and the sheath layer 4; the ceramic ring 31 has an insulating function, and meanwhile, the structure of the ceramic ring is circular, namely, the insulating layer 2 and the sheath layer 4 are separated to form a gap, so that the ceramic has good heat insulation and flame retardant functions, and the high temperature resistance of the cable can be improved.
The inner side of the ceramic ring 31 is embedded in the crosslinked polyethylene insulating layer 2, and the outer side of the ceramic ring 31 is embedded in the sheath layer; a silver-plated copper braided belt 32 is arranged in the gap, the silver-plated copper braided belt 32 wraps the whole cable, and the part of the silver-plated copper braided belt 32 penetrating through the ceramic ring 31 is fixed on the ceramic ring 31; in the process of preparing the insulating layer 3, the silver-plated copper braided belt 32 is firstly manufactured, then the silver-plated copper braided belt 32 penetrates through unsintered blanks of the ceramic rings 31 which are uniformly arranged, sintering is carried out after the manufacturing, the ceramic is solidified, the silver-plated copper braided belt 32 is simultaneously fixed, the ceramic rings 31 are fixed in the cable due to the fact that the inner sides and the outer sides of the ceramic rings 31 are respectively embedded on the insulating layer 2 and the protective sleeve layer 4, and deflection or sliding cannot occur, so that when the cable is bent, the ceramic rings 31 can drive the silver-plated copper braided belt 32 to do stretching movement, and when the distribution condition of the braided belt is influenced due to the fact that the silver-plated copper braided belt 32 has folds, gaps and the like due to extrusion or bending of inner cores of the cable, the cable can quickly solve the problems; firstly, the ceramic ring 31 has good structural effect and has a supporting function, the silver-plated copper braided belt 32 is just positioned in a gap formed after the silver-plated copper braided belt is supported, so that the adverse effect caused by compression is unlikely to be caused, and secondly, even if the surface of the silver-plated copper braided belt 32 is really wrinkled, so that the shielding effect is poor, the cable can be quickly adjusted back, the ceramic ring 31 is mainly driven by the cable when the cable is bent, and the silver-plated copper braided belt 32 is fixed on the ceramic ring 31, so that the twisting of the ceramic ring 31 can stretch the silver-plated copper braided belt 32, and the wrinkles are quickly eliminated. The remaining space in the void is filled with insulation material 30.
As shown in fig. 2: the wire core 1 comprises a plurality of wires 10, and the surfaces of the wires 10 are wrapped by insulating skins 11; the wire core 1 further comprises a plurality of strip-shaped plastic ribs 12, and the ribs 12 are uniformly distributed on the outer sides of the plurality of wires 10. The plastic ribs have a certain stretching effect, and mainly play a role in rapidly stretching the cable after the cable is bent, so that the cable recovers the shape, and the toughness of the cable is improved.
A plurality of annular grooves are uniformly formed in the outer surface of the sheath layer 4, and the annular grooves are triangular in the cross section of the cable shaft. The grooves have the effect of assisting the bending of the cable, the silver-plated copper braided belt 32 is stretched when the cable is bent, so that the shielding effect of the shielding layer is improved, the bending characteristic of the sheath 4 is specially improved, meanwhile, the situation that the cable cannot restore to the original shape is not worried, the cable can quickly restore to the shape due to the fact that the plastic ribs 12 in the cable can stretch the cable, and the plastic ribs 12 and the grooves on the surface of the sheath layer 4 play a complementary role.
Solid lubricating oil 40 is uniformly smeared on the inner walls of the two sides of the annular groove. Lubricating oil 40 mainly is the degree of durability that improves the slot, because seting up of slot, leads to this part of cable comparatively weak, can add lubricating oil 40 and improve the ability such as 4 ageing resistances of restrictive coating, and solid-state lubricating oil is not only durable simultaneously, can improve cable surface lubricity simultaneously.
And the outer surface of the sheath layer 4 is bonded with an asbestos mesh 41. The asbestos mesh belongs to silicate materials, can further protect the sheath layer, and also has excellent flame retardant and heat insulation effects.
The heat insulation material 30 is composed of the following raw materials in parts by weight: 30-40 parts of quartz stone powder, 15-20 parts of carbon powder and 10-15 parts of glass fiber. The heat insulating material filled in the gap has good heat insulating effect, and is a lubricating layer, so that the silver-plated copper braided belt 32 can be easily and freely contracted when the ceramic ring 31 stretches the silver-plated copper braided belt 32, and the heat insulating material filled in the gap also has the effect of assisting the silver-plated copper braided belt 32 to recover the forming.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a high temperature resistant shielding layer power cable which characterized in that: the cable sequentially comprises a wire core (1), a crosslinked polyethylene insulating layer (2), a shielding layer (3) and a sheath layer (4) from inside to outside;
the shielding layer (3) comprises a plurality of ceramic rings (31), silver-plated copper braided belts (32) and heat insulation materials (30); the ceramic rings (31) are arranged and extend all over the whole cable along the axial direction of the cable, the insulating layer (2) and the sheath layer (4) are separated by the ceramic rings (31), and a gap is formed between the insulating layer (2) and the sheath layer (4); the inner side of the ceramic ring (31) is embedded in the crosslinked polyethylene insulating layer (2), and the outer side of the ceramic ring (31) is embedded in the sheath layer; a silver-plated copper braided belt (32) is arranged in the gap, the silver-plated copper braided belt (32) wraps the whole cable, and the part of the silver-plated copper braided belt (32) penetrating through the ceramic ring (31) is fixed on the ceramic ring (31); the other remaining spaces in the void are filled with an insulating material (30);
the heat insulation material (30) is composed of the following raw materials in parts by weight: 30-40 parts of quartz stone powder, 15-20 parts of carbon powder and 10-15 parts of glass fiber.
2. The high temperature resistant shielding layer power cable according to claim 1, characterized in that: the wire core (1) comprises a plurality of wires (10), and the surfaces of the wires (10) are wrapped by insulating skins (11); the wire core (1) further comprises a plurality of strip-shaped plastic ribs (12), and the ribs (12) are uniformly distributed on the outer sides of the plurality of wires (10).
3. The high temperature resistant shielding layer power cable according to claim 1, characterized in that: a plurality of annular grooves are uniformly formed in the outer surface of the sheath layer (4), and the annular grooves are triangular in the cross section of the cable shaft.
4. A high temperature resistant shield power cable according to claim 3, characterized in that: solid lubricating oil (40) is uniformly smeared on the inner walls of the two sides of the annular groove.
5. The high temperature resistant shielding layer power cable according to claim 1, characterized in that: and the outer surface of the sheath layer (4) is bonded with a layer of asbestos mesh (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711364674.XA CN108133781B (en) | 2017-12-18 | 2017-12-18 | High temperature resistant shielding layer power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711364674.XA CN108133781B (en) | 2017-12-18 | 2017-12-18 | High temperature resistant shielding layer power cable |
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| Publication Number | Publication Date |
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| CN108133781A CN108133781A (en) | 2018-06-08 |
| CN108133781B true CN108133781B (en) | 2019-12-24 |
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| CN201711364674.XA Active CN108133781B (en) | 2017-12-18 | 2017-12-18 | High temperature resistant shielding layer power cable |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110675975A (en) * | 2019-08-22 | 2020-01-10 | 曹巍 | Polyethylene insulated braided shielding galvanized steel wire braided armored communication cable |
| CN112635108A (en) * | 2020-11-20 | 2021-04-09 | 马鞍山安慧智电子科技有限公司 | Special bending-resistant and rolling-resistant charging cable for large electronic product |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105097093B (en) * | 2015-08-26 | 2017-08-01 | 安徽蒙特尔电缆集团有限公司 | A kind of mining anti-extrusion Heavy-duty cables |
| CN106298044B (en) * | 2016-10-14 | 2018-08-10 | 张家港市新邦电力科技有限公司 | A kind of reinforced copper Baogang signal cable |
| CN206558258U (en) * | 2017-03-14 | 2017-10-13 | 深圳市顺电工业电缆有限公司 | A kind of visual detection equipment dedicated data transmission cable |
| CN107293360A (en) * | 2017-06-14 | 2017-10-24 | 福建国威电子科技股份有限公司 | A kind of wire |
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| CN108133781A (en) | 2018-06-08 |
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