CN114334256B - Cross-linked polyolefin insulating sheath-free low-smoke halogen-free flame-retardant B1-level wire - Google Patents
Cross-linked polyolefin insulating sheath-free low-smoke halogen-free flame-retardant B1-level wire Download PDFInfo
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- CN114334256B CN114334256B CN202111660856.8A CN202111660856A CN114334256B CN 114334256 B CN114334256 B CN 114334256B CN 202111660856 A CN202111660856 A CN 202111660856A CN 114334256 B CN114334256 B CN 114334256B
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Abstract
The invention relates to the field of wire preparation, and provides a crosslinked polyolefin insulating sheath-free low-smoke halogen-free flame-retardant B1-level wire which comprises a conductor, a wrapping tape layer, a flame-retardant layer and a protective insulating layer from inside to outside, wherein the protective insulating layer comprises an inner insulating layer, at least one friction composite layer and an outer insulating layer, the friction composite layer comprises a plurality of mutually overlapped friction layers, the inner insulating layer and the outer insulating layer are both made of crosslinked polyolefin, and the multilayer overlapped friction composite layer can effectively dissipate vibration energy and ensure normal use of the wire.
Description
Technical Field
The invention relates to the field of wire and cable preparation, in particular to a crosslinked polyolefin insulation sheath-free low-smoke halogen-free flame-retardant B1-level wire.
Background
The sheathing-free cable is an auxiliary device for carrying out power transmission on daily electrical appliances, office electrical appliances and production equipment in places such as daily life, office environment and enterprise production, and is widely used in the fields such as daily life, office production and the like; the existing unshrouded cable comprises a cable core, a functional layer and an insulating layer, wherein the cross section of a copper core is circular; the functional layer may include a shielding layer, a flame retardant layer, a fire retardant layer, or the like.
The vibration reduction function of the existing cable is limited, when the cable is distributed in a high-vibration external environment, layers of the cable are easy to rub against each other, so that the mechanical strength of the electric wire is damaged, and the normal use of the cable is affected.
Disclosure of Invention
Therefore, the crosslinked polyolefin insulating sheath-free low-smoke halogen-free flame-retardant B1-level electric wire is required to be provided, and the problems that the vibration reduction effect of the existing electric wire is poor and the normal operation of the electric wire is affected are solved.
In order to achieve the above purpose, the invention provides a cross-linked polyolefin insulated low-smoke halogen-free flame-retardant B1-level electric wire, which comprises a conductor, a wrapping tape layer, a flame-retardant layer and a protective insulating layer from inside to outside, wherein the protective insulating layer comprises an inner insulating layer, at least one friction composite layer and an outer insulating layer, the friction composite layer comprises a plurality of mutually overlapped friction layers, and the inner insulating layer and the outer insulating layer are both made of cross-linked polyolefin.
Further, the friction composite layer comprises a plurality of circumferentially arranged composite arc segments, each composite arc segment comprises a plurality of friction layers, and the friction layers are also arc-shaped.
Further, an elastic reset piece is connected between two adjacent composite arc sections. The elastic structural member can prevent instability between friction layers of the composite arc-shaped section under the condition of large vibration, and after vibration, the friction composite layer can automatically reset, so that the reliability of the friction composite layer is ensured.
Further, the elastic reset piece comprises a reset spring and two connecting plates respectively fixed at two ends of the reset spring, and the connecting plates are abutted against the ends of the composite arc-shaped section. After the friction layer relatively slides due to the vibration, the return spring stabilizes and returns the friction layer.
Further, the elastic restoring piece is an elastic bag.
Further, at least two clamping layers are arranged between the inner insulating layer and the outer insulating layer, each friction composite layer is arranged between two adjacent clamping layers, and the elastic modulus of each clamping layer is larger than that of each friction composite layer. The clamping layer is used for clamping and fixing the friction composite layer, and because the elastic modulus of the clamping layer is larger than that of the friction composite layer, when the electric wire is vibrated, the tensile deformation of the clamping layer is smaller than that of the friction layer, and the stretching and the compression of the friction layer are hindered, so that the shearing strain and the shearing stress are generated in the friction composite layer, and the effect of dissipating vibration energy is achieved by utilizing the shearing effect of the friction layer.
Further, the thickness ratio of the friction composite layer to the clamping layer is 1-3:1. The number and thickness of the friction composite layer and the clamping layer can be adjusted according to the requirements of the working environments of the electric wires, so that the requirements of different working environments are met.
Further, the material of the clamping layer is epoxy resin.
The technical scheme has the following beneficial effects:
the electric wire has the characteristics of low toxicity, low smoke, low halogen, flame retardance and cleanness, the protective insulating layer made of the crosslinked polyolefin has good insulating property and mechanical property, meanwhile, the friction composite layer reduces vibration applied to the electric wire through friction, normal operation of the electric wire is ensured, the multi-layer structure of the friction composite layer can be damped more, and the environment adaptability is good.
Drawings
Fig. 1 is a structural view of the electric wire according to embodiment 1.
Fig. 2 is a structural view of the electric wire according to embodiment 2.
Fig. 3 is a structural view of the electric wire according to embodiment 3.
Fig. 4 is a structural view of the electric wire according to embodiment 4.
Fig. 5 is a structural view of the electric wire according to embodiment 5.
Reference numerals illustrate:
1. a conductor; 2. a tape layer; 3. a flame retardant layer; 4. a protective insulating layer; 41. an inner insulating layer; 42. an outer insulating layer; 5. friction composite layer; 51. a friction layer; 6. a clamping layer; 7. an elastic reset piece; 71. a return spring; 72. a connecting plate; 73. an elastic bag.
Detailed Description
In order to describe the technical content, constructional features, achieved objects and effects of the technical solution in detail, the following description is made in connection with the specific embodiments in conjunction with the accompanying drawings.
Example 1
Referring to fig. 1, the present embodiment provides a cross-linked polyolefin insulated low smoke zero halogen flame retardant B1-level wire, which comprises a conductor 1, a tape layer 2, a flame retardant layer 3 and a protective insulating layer 4 from inside to outside, wherein the protective insulating layer 4 comprises an inner insulating layer 41, a friction composite layer 5 and an outer insulating layer 42, and both the inner insulating layer 41 and the outer insulating layer 42 are made of cross-linked polyolefin. The friction composite layer 5 comprises two superimposed friction layers 51.
In this embodiment, the thickness of the two friction layers 51 is the same.
In another embodiment, the thickness of the outer friction layer 51 is greater than the thickness of the inner friction layer 51.
Example 2
Referring to fig. 2, this embodiment provides a crosslinked polyolefin insulated, non-jacketed, low smoke, non-halogen, flame retardant B1 grade wire, which differs from embodiment 1 in that:
two layers of clamping layers 6 are arranged between the inner insulating layer 41 and the outer insulating layer 42, the friction composite layer 5 is arranged between the two layers of clamping layers 6, and the elastic modulus of the clamping layers 6 is larger than that of the friction composite layer 5. The clamping layer 6 is used for clamping and fixing the friction composite layer 5, and because the elastic modulus of the clamping layer 6 is larger than that of the friction composite layer 5, when the electric wire is vibrated, the tensile deformation of the clamping layer 6 is smaller than that of the friction layer 51, and the stretching and compression of the friction layer 51 are blocked, so that the shearing strain and shearing stress are generated in the friction composite layer 5, and the effect of dissipating vibration energy is achieved by utilizing the shearing effect of the friction layer 51.
The thickness ratio of the friction composite layer 5 to the clamping layer 6 is 3:1. The number and thickness of the friction composite layer 5 and the clamping layer 6 can be adjusted according to the requirements of the working environments of the electric wires, so that the requirements of different working environments can be met.
The material of the clamping layer 6 is epoxy resin.
Example 3
Referring to fig. 3, this embodiment provides a crosslinked polyolefin insulated, non-jacketed, low smoke, non-halogen, flame retardant B1 grade wire, which differs from embodiment 2 in that:
the number of the clamping layers 6 is three, the number of the friction layers 51 is two, and the thickness ratio of the friction composite layer 5 to the clamping layers 6 is 1:1. The intermediate layer clamping layer 6 acts as a support.
Example 4
Referring to fig. 4, this embodiment provides a crosslinked polyolefin insulated, non-jacketed, low smoke, non-halogen, flame retardant B1 grade wire, which differs from embodiment 2 in that:
the friction composite layer 5 comprises four circumferentially arranged composite arc segments, and the friction layer 51 is also arc-shaped. An elastic reset piece 7 is connected between two adjacent composite arc sections. The elastic structural member can prevent instability between the friction layers 51 of the composite arc-shaped section under the condition of large vibration, and after vibration, the friction composite layer 5 can automatically reset, so that the reliability of the friction composite layer 5 is ensured.
In this embodiment, the elastic restoring member 7 includes a restoring spring 71 and two connecting plates 72 fixed at two ends of the restoring spring 71, where the connecting plates 72 are abutted against the ends of the composite arc segment. After the friction layer 51 relatively slides due to the vibration, the return spring 71 stabilizes and returns the friction layer 51.
Example 5
Referring to fig. 5, this embodiment provides a crosslinked polyolefin insulated, non-jacketed, low smoke, non-halogen, flame retardant B1 grade wire, which differs from embodiment 4 in that:
the elastic restoring piece 7 is an elastic bag 73.
The insulating layer and the flame-retardant layer 3 have the characteristics of low toxicity, low smoke, low halogen, flame retardance and cleanness, the protective insulating layer 4 made of crosslinked polyolefin has good insulating property and mechanical property, meanwhile, the friction composite layer 5 reduces vibration suffered by the electric wire through friction, normal operation of the electric wire is ensured, the multi-layer structure of the friction composite layer 5 can be more damped, and the environment adaptability is good.
It is noted that relational terms such as first and second, and the like 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. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal 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 terminal. Without further limitation, an element defined by the statement "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article or terminal device comprising the element. Further, herein, "greater than," "less than," "exceeding," and the like are understood to not include the present number; "above", "below", "within" and the like are understood to include this number.
While the embodiments have been described above, other variations and modifications will occur to those skilled in the art once the basic inventive concepts are known, and it is therefore intended that the foregoing description and drawings illustrate only embodiments of the invention and not limit the scope of the invention, and it is therefore intended that the invention not be limited to the specific embodiments described, but that the invention may be practiced with their equivalent structures or with their equivalent processes or with their use directly or indirectly in other related fields.
Claims (7)
1. The low-smoke halogen-free flame-retardant B1-level electric wire is characterized by comprising a conductor, a wrapping tape layer, a flame-retardant layer and a protective insulating layer from inside to outside, wherein the protective insulating layer comprises an inner insulating layer, at least one friction composite layer and an outer insulating layer, the friction composite layer comprises a plurality of mutually overlapped friction layers, and the inner insulating layer and the outer insulating layer are both made of crosslinked polyolefin;
at least two clamping layers are arranged between the inner insulating layer and the outer insulating layer, each friction composite layer is arranged between two adjacent clamping layers, and the elastic modulus of each clamping layer is larger than that of each friction composite layer.
2. The crosslinked polyolefin insulated, low smoke, zero halogen, flame retardant B1 grade wire of claim 1, wherein the friction composite layer comprises a plurality of circumferentially disposed composite arcuate segments, each composite arcuate segment comprising a plurality of the friction layers, the friction layers also being arcuate.
3. The crosslinked polyolefin insulated, sheath-less, low smoke, halogen-free, flame retardant B1 grade wire of claim 2, wherein an elastic reset member is connected between adjacent two composite arcuate segments.
4. The crosslinked polyolefin insulated, sheath-free, low smoke, halogen-free and flame retardant B1 grade wire of claim 3, wherein the elastic return element comprises a return spring and two connecting plates respectively fixed at two ends of the return spring, wherein the connecting plates are abutted against the ends of the composite arc section.
5. The crosslinked polyolefin insulated, sheath-less, low smoke, halogen-free, flame retardant B1 grade wire of claim 3, wherein the elastic restoring member is an elastic bladder.
6. The crosslinked polyolefin insulated, low smoke, zero halogen, flame retardant B1 grade wire of claim 1, wherein the friction composite layer and the grip layer have a thickness ratio of 1-3:1.
7. The crosslinked polyolefin insulated, sheath-less, low smoke, halogen-free, flame retardant B1 grade wire of claim 1, wherein the material of the gripping layer is an epoxy resin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111660856.8A CN114334256B (en) | 2021-12-31 | 2021-12-31 | Cross-linked polyolefin insulating sheath-free low-smoke halogen-free flame-retardant B1-level wire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111660856.8A CN114334256B (en) | 2021-12-31 | 2021-12-31 | Cross-linked polyolefin insulating sheath-free low-smoke halogen-free flame-retardant B1-level wire |
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| Publication Number | Publication Date |
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| CN114334256A CN114334256A (en) | 2022-04-12 |
| CN114334256B true CN114334256B (en) | 2023-09-19 |
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| JP2000080609A (en) * | 1998-09-08 | 2000-03-21 | Nakai Shoko Kk | Damping device for cable and protecting method of cable |
| CN102568681A (en) * | 2012-01-30 | 2012-07-11 | 江苏新远程电缆股份有限公司 | Environmental protection shock absorption direct current cable for city track traffic |
| CN102959644A (en) * | 2010-07-06 | 2013-03-06 | 瑞典爱立信有限公司 | Self-supporting cable |
| CN106057334A (en) * | 2016-08-02 | 2016-10-26 | 上海新益电力线路器材有限公司 | Explosion-proof sheath for wire and cable and manufacturing method thereof |
| CN106910560A (en) * | 2017-04-10 | 2017-06-30 | 安徽凌宇电缆科技有限公司 | Cable for new-energy automobile |
| CN109411134A (en) * | 2018-09-25 | 2019-03-01 | 湖南盛世电线电缆有限公司 | A kind of cable of transportation safety breakage-proof |
| CN212380165U (en) * | 2020-07-14 | 2021-01-19 | 安徽腾飞特种电缆科技有限公司 | Wear-resistant outdoor cable |
| CN212434278U (en) * | 2020-06-22 | 2021-01-29 | 浙江万马股份有限公司 | Durable insulation irradiation crosslinking halogen-free low-smoke high-flame-retardant safety wire |
| CN113035423A (en) * | 2021-03-10 | 2021-06-25 | 江苏中柔电缆有限公司 | High-strength tensile wear-resistant cable |
-
2021
- 2021-12-31 CN CN202111660856.8A patent/CN114334256B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000080609A (en) * | 1998-09-08 | 2000-03-21 | Nakai Shoko Kk | Damping device for cable and protecting method of cable |
| CN102959644A (en) * | 2010-07-06 | 2013-03-06 | 瑞典爱立信有限公司 | Self-supporting cable |
| CN102568681A (en) * | 2012-01-30 | 2012-07-11 | 江苏新远程电缆股份有限公司 | Environmental protection shock absorption direct current cable for city track traffic |
| CN106057334A (en) * | 2016-08-02 | 2016-10-26 | 上海新益电力线路器材有限公司 | Explosion-proof sheath for wire and cable and manufacturing method thereof |
| CN106910560A (en) * | 2017-04-10 | 2017-06-30 | 安徽凌宇电缆科技有限公司 | Cable for new-energy automobile |
| CN109411134A (en) * | 2018-09-25 | 2019-03-01 | 湖南盛世电线电缆有限公司 | A kind of cable of transportation safety breakage-proof |
| CN212434278U (en) * | 2020-06-22 | 2021-01-29 | 浙江万马股份有限公司 | Durable insulation irradiation crosslinking halogen-free low-smoke high-flame-retardant safety wire |
| CN212380165U (en) * | 2020-07-14 | 2021-01-19 | 安徽腾飞特种电缆科技有限公司 | Wear-resistant outdoor cable |
| CN113035423A (en) * | 2021-03-10 | 2021-06-25 | 江苏中柔电缆有限公司 | High-strength tensile wear-resistant cable |
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