CN216980204U - Waterproof rigid mineral insulation fireproof cable - Google Patents
Waterproof rigid mineral insulation fireproof cable Download PDFInfo
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- CN216980204U CN216980204U CN202122068011.1U CN202122068011U CN216980204U CN 216980204 U CN216980204 U CN 216980204U CN 202122068011 U CN202122068011 U CN 202122068011U CN 216980204 U CN216980204 U CN 216980204U
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Abstract
The utility model discloses a waterproof rigid mineral insulation fireproof cable which comprises a copper conductive wire core, wherein a magnesium oxide powder mineral insulating layer is arranged on the surface of the copper conductive wire core, a metal copper sleeve protective layer is arranged on the outer side of the magnesium oxide powder mineral insulating layer, a waterproof isolation layer is arranged on the outer side of the metal copper sleeve protective layer, and a halogen-free low-smoke flame-retardant outer sheath is arranged on the outer side of the waterproof isolation layer. According to the utility model, the waterproof isolation layer is arranged for waterproofing the magnesium oxide powder mineral insulation layer, and the molecular structure of the polyethylene is changed from a linear structure into a three-dimensional net structure after crosslinking, so that the waterproof performance of the cable is fully ensured, and the waterproof performance of the magnesium oxide powder mineral insulation layer is improved.
Description
Technical Field
The utility model relates to the technical field of mineral insulated cables, in particular to a waterproof rigid mineral insulated fireproof cable.
Background
Mineral insulated cable is called MI cable for short, when used as wiring, the cable is commonly called magnesium oxide cable or fireproof cable in China, the cable is composed of copper core, mineral insulating material, copper and other metal sheaths, because of the particularity of the material and the structure of the product, the annealed copper is used as a conductor, magnesium oxide and the like are densely filled in the conductor to be used as insulation, the annealed copper pipe is used as a sheath, and if necessary, the halogen-free low-smoke flame-retardant plastic outer sheath is extruded outside the copper sheath, and the magnesium oxide powder filled in the cable copper sheath is used for insulation, so that the cable copper sheath is easy to absorb moisture to cause the reduction of the insulation performance, therefore, the waterproof performance of the cable is very important, but the existing mineral insulated cable has poor waterproof performance, in use, the cable is easy to damp and absorb moisture, so that the mineral insulated cable is poor in insulation property, potential safety hazards exist, and the service life of the mineral insulated cable is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a waterproof rigid mineral insulated fireproof cable, which has the advantage of water resistance and solves the problems that the existing mineral insulated cable is poor in waterproof performance and prone to being affected with moisture and moisture in use, so that the mineral insulated cable is poor in insulativity, potential safety hazards exist, and the service life of the mineral insulated cable is influenced.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a waterproof type rigidity mineral insulation fireproof cable, includes copper conductor core, the surface of copper conductor core is provided with magnesium oxide powder mineral insulation layer, the outside of magnesium oxide powder mineral insulation layer is provided with metal copper sheathing inoxidizing coating, the outside of metal copper sheathing inoxidizing coating is provided with waterproof isolation layer, waterproof isolation layer's the outside is provided with halogen-free low smoke flame retardant outer sheath, waterproof isolation layer includes the waterproofing strip, the outside of metal copper sheathing inoxidizing coating and the inboard of waterproofing strip are connected, the outside of waterproofing strip is provided with the crosslinked polyethylene waterproof layer.
Preferably, the shape of the copper conductive wire core is circular, and the material of the copper conductive wire core is an annealed copper conductor.
Preferably, the magnesium oxide powder mineral insulating layer is installed in a closed continuous filling mode.
Preferably, the material of the metal copper sheathing protective layer adopts a high-conductivity annealed copper strip, and the metal copper sheathing protective layer adopts longitudinal argon arc welding continuous welding.
Preferably, the installation mode of the halogen-free low-smoke flame-retardant outer sheath is formed by extrusion.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model is used for waterproofing the magnesium oxide powder mineral insulating layer by arranging the waterproof isolating layer, and the molecular structure of the polyethylene is changed into a three-dimensional net structure from a linear structure after cross-linking, so that the waterproof performance of the cable is fully ensured, and the waterproof performance of the magnesium oxide powder mineral insulating layer is improved, and the cable has the advantages which are not possessed by other cables, such as fire resistance, large current-carrying capacity, mechanical damage resistance, no halogen, no toxicity, explosion prevention, water prevention, corrosion resistance, long service life, safety, overload resistance, high temperature resistance, low cost, small bending radius, termite prevention, rat bite prevention, and the like which are possessed by a copper sheath to protect a grounding wire, and simultaneously solves the problems that the existing mineral insulated cable has poor waterproof performance, is easy to damp and absorb moisture in use, so that the mineral insulated cable has poor insulating performance and potential safety hazard, the service life of the mineral insulated cable is influenced.
2. The utility model is used for gradually reducing the outer diameter of the cable by arranging the metal copper sleeve protective layer, the magnesium oxide powder is gradually compacted, the protective effect can be achieved, the copper sleeve of the cable can be used as protection and grounding, the halogen-free low-smoke flame-retardant outer sheath is used for protecting the metal sheath to adapt to various corrosive places, and meanwhile, the halogen-free low-smoke flame-retardant outer sheath has no influence on the environment, underground water and other resources.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic cross-sectional view of the waterproof insulation layer of the present invention.
In the figure: 1. a copper conductive core; 2. a magnesium oxide powder mineral insulating layer; 3. a metal copper sleeve protective layer; 4. a waterproof isolation layer; 41. a water blocking tape; 42. a waterproof layer of crosslinked polyethylene; 5. there is not steamed low fire-retardant oversheath of cigarette.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description herein, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings to facilitate the description of the patent and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting of the patent. In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1-2, a waterproof rigid mineral insulated fireproof cable comprises a copper conductive core 1, a magnesium oxide powder mineral insulating layer 2 is arranged on the surface of the copper conductive core 1, a metal copper sheath protective layer 3 is arranged on the outer side of the magnesium oxide powder mineral insulating layer 2, a waterproof isolation layer 4 is arranged on the outer side of the metal copper sheath protective layer 3, a halogen-free low-smoke flame-retardant outer sheath 5 is arranged on the outer side of the waterproof isolation layer 4, the waterproof isolation layer 4 comprises a water blocking tape 41, the outer side of the metal copper sheath protective layer 3 is connected with the inner side of the water blocking tape 41, a cross-linked polyethylene waterproof layer 42 is arranged on the outer side of the water blocking tape 41, the waterproof isolation layer 4 is used for waterproofing the magnesium oxide powder mineral insulating layer 2, and since polyethylene is crosslinked to change a molecular structure from a linear structure into a three-dimensional net structure, the waterproof performance of the cable is fully ensured, thereby improving the waterproof performance of the magnesium oxide powder mineral insulating layer 2, as all the materials of the cable are inorganic materials, the cable has the advantages that other cables do not have, such as fire resistance, large current-carrying capacity, mechanical damage resistance, halogen-free, non-toxic, explosion-proof, water-proof, corrosion-resistant, long service life, safety, overload resistance, high temperature resistance, low cost, small bending radius, termite and rat bite prevention, a copper sheath is used for protecting a grounding wire and the like, the shape of the copper conductive core 1 is circular, the copper conductive core 1 is made of an annealed copper conductor, the magnesium oxide powder mineral insulating layer 2 is installed in a closed continuous filling mode, the metal copper sheath protective layer 3 is made of a high-conductivity annealed copper strip, the metal copper argon arc sheath protective layer 3 is continuously welded in a longitudinal wrapping mode, the outer diameter of the cable is gradually reduced by arranging the metal copper sheath protective layer 3, the magnesium oxide powder is gradually compacted, the protective effect can be achieved, and the copper sheath of the cable can be used as protective grounding, the installation mode of the halogen-free low-smoke flame-retardant outer sheath 5 adopts extrusion molding, and the halogen-free low-smoke flame-retardant outer sheath 5 is used for protecting metal sheaths to adapt to various corrosive places and has no influence on resources such as environment, underground water and the like.
When the cable is used, the magnesium oxide powder mineral insulating layer 2 is waterproof through the waterproof isolation layer 4, the molecular structure of the polyethylene is changed into a three-dimensional net structure from a linear structure after cross-linking, and the waterproof performance of the cable is fully ensured, so that the waterproof performance of the magnesium oxide powder mineral insulating layer 2 is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a waterproof type rigidity mineral insulation fireproof cable, includes copper conductor core (1), its characterized in that: the surface of the copper conductive wire core (1) is provided with a magnesium oxide powder mineral insulating layer (2), the outer side of the magnesium oxide powder mineral insulating layer (2) is provided with a metal copper sleeve protective layer (3), the outer side of the metal copper sleeve protective layer (3) is provided with a waterproof isolating layer (4), the outer side of the waterproof isolating layer (4) is provided with a halogen-free low-smoke flame-retardant outer sheath (5), the waterproof isolating layer (4) comprises a water blocking tape (41), the outer side of the metal copper sleeve protective layer (3) is connected with the inner side of the water blocking tape (41), and the outer side of the water blocking tape (41) is provided with a crosslinked polyethylene waterproof layer (42).
2. The waterproof rigid mineral insulated fireproof cable of claim 1, wherein: the appearance of copper conductor core (1) is circular, the material of copper conductor core (1) adopts annealing copper conductor.
3. The waterproof rigid mineral insulated fireproof cable of claim 1, wherein: the magnesium oxide powder mineral insulating layer (2) is installed in a closed continuous filling mode.
4. The waterproof rigid mineral insulated fireproof cable of claim 1, wherein: the material of the metal copper sheathing protective layer (3) adopts a high-conductivity annealed copper strip, and the metal copper sheathing protective layer (3) adopts longitudinal argon arc welding continuous welding.
5. The waterproof rigid mineral insulated fireproof cable of claim 1, wherein: the installation mode of the halogen-free low-smoke flame-retardant outer sheath (5) adopts extrusion molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122068011.1U CN216980204U (en) | 2021-08-30 | 2021-08-30 | Waterproof rigid mineral insulation fireproof cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122068011.1U CN216980204U (en) | 2021-08-30 | 2021-08-30 | Waterproof rigid mineral insulation fireproof cable |
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| Publication Number | Publication Date |
|---|---|
| CN216980204U true CN216980204U (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122068011.1U Active CN216980204U (en) | 2021-08-30 | 2021-08-30 | Waterproof rigid mineral insulation fireproof cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295228A (en) * | 2022-08-22 | 2022-11-04 | 特变电工山东鲁能泰山电缆有限公司 | 1kV rigid mineral insulation fireproof cable |
-
2021
- 2021-08-30 CN CN202122068011.1U patent/CN216980204U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295228A (en) * | 2022-08-22 | 2022-11-04 | 特变电工山东鲁能泰山电缆有限公司 | 1kV rigid mineral insulation fireproof cable |
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