CN209880228U - Full-water-blocking medium-voltage cable - Google Patents
Full-water-blocking medium-voltage cable Download PDFInfo
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- CN209880228U CN209880228U CN201921104133.8U CN201921104133U CN209880228U CN 209880228 U CN209880228 U CN 209880228U CN 201921104133 U CN201921104133 U CN 201921104133U CN 209880228 U CN209880228 U CN 209880228U
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Abstract
The utility model discloses a full water-blocking medium voltage cable, which comprises a composite cable core, a water-blocking layer, an anticorrosive layer, a fireproof layer, a metal sheath layer and an outer sheath which are arranged from inside to outside in sequence; the composite cable core is formed by stranding a plurality of water-resistant cables, and the water-resistant layer is made of polyethylene material; and a water-blocking filling layer is arranged in a gap between the composite cable core and the water-blocking layer, and a plurality of prefabricated heat dissipation parts are further arranged in the water-blocking filling layer. Compared with the conventional medium-voltage cable, the full-water-blocking medium-voltage cable adopts the water-blocking filling layer and the water-blocking layer, and the medium-voltage cable is endowed with excellent radial water-blocking performance. Meanwhile, the composite cable core is formed by a plurality of water-blocking cables, so that the damage of moisture to the cables is further prevented. The medium-voltage cable can be ensured to normally run for a long time in the outdoor or humid environment.
Description
Technical Field
The utility model relates to a wire and cable technical field specifically is a medium voltage cable blocks water entirely.
Background
In recent years, with the rapid development of power related industries, medium voltage cables have the advantages of light weight, convenience in construction, large current-carrying capacity and suitability for long-distance power supply, so that the demand of the medium voltage cables is greatly increased.
The laying environment of the medium-voltage cable is complex, particularly for a wet laying environment, the conventional medium-voltage cable product has poor water resistance, water permeates into the cable after long-time use, the electrical performance is influenced, the use efficiency of the cable is also seriously reduced, and even the problems of line faults and the like occur, so that the safety of the cable has problems. The cable fault frequency in some special occasions is easy to cause, and huge economic loss is caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the poor technical defect of the water blocking performance of above-mentioned current medium voltage cable, the utility model provides a medium voltage cable blocks water entirely, it has excellent water blocking performance.
In order to solve the above problem, the utility model discloses realize according to following technical scheme:
the utility model relates to a full water-blocking medium voltage cable, which comprises a composite cable core, a water-blocking layer, an anticorrosive layer, a fireproof layer, a metal sheath layer and an outer sheath which are arranged from inside to outside in sequence;
the composite cable core is formed by stranding a plurality of water-resistant cables, and the water-resistant layer is made of polyethylene material;
and a water-blocking filling layer is arranged in a gap between the composite cable core and the water-blocking layer, and a plurality of prefabricated heat dissipation parts are further arranged in the water-blocking filling layer.
Furthermore, the water-blocking cable comprises a conductive wire core and a semi-conductive water-blocking tape layer wrapping the conductive wire core;
and a water-tight layer is filled in a gap between the conductive wire core and the semi-conductive water-blocking tape layer.
Further, the watertight layer is formed by filling the semiconductive watertight composition.
Furthermore, the water-blocking cable also comprises a conductor shielding layer, a conductor insulating layer, an insulating shielding layer and a metal shielding layer which are arranged from inside to outside in sequence; the conductor shielding layer wraps the outer surface of the semi-conductive water blocking tape layer.
Furthermore, the conductor shielding layer is made of a peroxide crosslinking type semi-conductive shielding material for a crosslinked polyethylene insulated cable conductor;
the conductor insulating layer is made of peroxide crosslinked polyethylene insulating material for the crosslinked polyethylene insulated cable;
the insulation shielding layer is made of peroxide crosslinking type semi-conductive shielding material for insulating the crosslinked polyethylene insulated cable;
the metal shielding layer is formed by lapping and wrapping a soft copper tape on the insulating shielding layer in an overlapping mode.
Furthermore, the waterproof filling layer is formed by filling sealant.
Furthermore, the anticorrosive coating is an anticorrosive tape wrapped outside the water-blocking layer.
Further, the fire-proof layer is made of fire-proof mud.
Further, the metal sheath layer is formed by welding a copper strip.
Further, the outer sheath is a rat and ant prevention weather-resistant polyethylene sheath.
Further, the prefabricated heat dissipation piece is made of graphite heat dissipation cloth materials.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model provides a medium voltage cable blocks water entirely compares with current conventional medium voltage cable, adopts the filling layer and the water blocking layer that blocks water, gives the excellent radial water blocking performance of medium voltage cable. Meanwhile, the composite cable core is formed by a plurality of water-blocking cables, so that the damage of moisture to the cables is further prevented. The medium-voltage cable can be ensured to normally run for a long time in the outdoor or humid environment.
2. The utility model discloses a still add a plurality of prefabricated heat-dissipating pieces in the filling layer that blocks water, it is used for absorbing and evenly opens the produced heat of cable work that blocks water to the whole temperature of adjustment cable keeps at a good operating temperature. The cable has the advantages of reducing the increase of electric loss, improving the current-carrying capacity, greatly prolonging the service life of the cable and improving the carrying capacity. On the other hand, the water-blocking filler is integrated in the water-blocking filler layer, so that the outer diameter of the cable is not increased.
3. The outer layer of the medium-voltage cable further comprises a fireproof layer and a metal sheath layer, so that the medium-voltage cable is flame-retardant and fireproof, the safety and reliability of the operation of the cable are improved, and the service life of the cable is prolonged. On the other hand, the presence of the metal sheath layer also imparts radial water-blocking properties to the cable.
Drawings
The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:
fig. 1 is a schematic cross-sectional structure view of the full water-blocking medium voltage cable of the present invention;
fig. 2 is a schematic cross-sectional structure view of the water-blocking cable of the present invention;
in the figure:
1-a water-blocking cable, 11-a conductive wire core, 12-a watertight layer and 13-a semi-conductive water-blocking tape layer;
2-water-blocking filling layer and 21-prefabricated heat dissipation piece;
3-a water-resistant layer;
4-an anticorrosive layer;
5-a fire-proof layer;
6-metal sheath layer
7-outer sheath.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1, the utility model discloses a preferred structure of full water blocking medium voltage cable.
As shown in fig. 1, the full water-blocking medium voltage cable comprises a composite cable core, a water-blocking layer 3, an anticorrosive layer 4, a fireproof layer 5, a metal sheath layer 6 and an outer sheath 7 which are sequentially arranged from inside to outside.
Wherein, the composite cable core is formed by stranding a plurality of water-blocking cables 1. Water-blocking filling layers 2 are filled between the water-blocking cables 1 and the water-blocking layer 3.
As an example, the water-blocking filling layer 2 is filled with a sealant.
The utility model discloses a cable design blocks water combines the water blocking layer, blocks water filling layer and metal sheathing layer, has given the very excellent water blocking performance of cable. The instant outer damage, the normal work of cable is still maintained to the performance that blocks water of each cable that blocks water self, avoids the circuit trouble to cause calamity or huge economic loss.
As shown in fig. 2, the utility model provides a cable 1 that blocks water, it includes by interior from outer conductive core 11, the semiconduction band layer 13 that blocks water, conductor shield, conductor insulation layer, insulation shielding layer and the metallic shield who sets gradually.
In one embodiment, the conductor shielding layer is formed by extruding a peroxide crosslinking type semi-conductive shielding material (PYJD, meeting the requirements of JB/T10738 standard) for a crosslinked polyethylene insulated cable conductor. The conductor insulation layer is formed by extruding peroxide crosslinked polyethylene insulation materials (YJ-10 and YJ-35 which meet the JB/T10437 standard requirement) for the crosslinked polyethylene insulation cable. The insulation shielding layer is formed by extruding peroxide crosslinking type semi-conductive shielding material PYJJ for insulating a crosslinked polyethylene insulated cable, and meets the JB/T10738 standard requirement).
Furthermore, the conductor shielding layer, the conductor insulating layer and the insulation shielding layer are formed by three layers of co-extrusion through dry-process crosslinking production equipment, are tightly coated on the semi-conductive water-blocking tape layer 13, and have thicknesses meeting the corresponding voltage grade requirements of the GB/T12706 standard;
the metal shielding layer is formed by lapping and wrapping a soft copper tape on the insulating shielding layer in an overlapping mode. The metal shielding layer is a soft copper belt with the thickness of 0.12mm, and meets the standard requirement of GB/T12706.
Preferably, a watertight layer 12 is filled between the conductive core 11 and the semi-conductive water blocking tape layer 13.
In one embodiment, the conductive core 11 is formed by twisting a plurality of round copper single wires with good quality, and the gaps between the copper single wires are filled with a watertight layer 12. After a plurality of copper single wires are tightly pressed into a cable, a semi-conductive water blocking tape layer 13 is tightly wrapped outside the conductive wire core 11 to form the water blocking cable 1.
As an implementation, the watertight layer 12 is a semi-conductive watertight composition. The semiconductive watertight composition may be a resin composition prepared from a base polymer containing a crosslinked polyethylene, a water-absorbing polymer, and acetylene black or furnace black as carbon black, or carbon black as a by-product of carbon black.
As shown in fig. 1, the utility model discloses a medium voltage cable has 3 cables 1 that block water, and the composite cable core is 3 cables 1 transposition stranding that block water.
Further, the water-resistant layer 3 is made of polyethylene material.
As an example, the water-resistant filling layer 2 and the water-resistant layer 3 are extruded on the composite cable core by a double-layer co-extrusion process. Sufficient pressure is applied to the double-layer co-extrusion die to enable the water-blocking filling layer 2 to be tightly filled, the double waterproof and moistureproof effects are achieved, and the waterproof performance is excellent.
In the present embodiment, preferably, a plurality of prefabricated heat sinks 21 are further added to the water-blocking filling layer 2. Specifically, as shown in fig. 1, 3 prefabricated heat sinks 21 are arranged on the periphery of the composite cable core, and are extruded together with the water-blocking filling layer 2.
As an example, the prefabricated heat sink 21 uses a graphite heat-dissipating cloth material, which has excellent heat-conducting property, light specific gravity, low thermal resistance, and is flexible and bendable repeatedly. The prefabricated heat dissipation piece 21 is used for uniformly opening heat generated by the operation of the conductive wire core 11, so that the overall temperature of the cable is kept at a good working temperature, the outer diameter of the cable is not increased, the electric loss is reduced, the current-carrying capacity is improved, and the service life and carrying capacity of the cable are greatly improved.
As an example, the anti-corrosion layer 4 is an anti-corrosion tape, and is densely coated on the water-resistant layer 3 through an overlapping wrapping process. The anticorrosive coating 4 effectively prevents the water-blocking layer 3 from being corroded and the like, and ensures the long-term effectiveness of the water-blocking effect.
As an example, the fire-proof layer 5 is solid fire-proof mud, and the fire-proof layer 5 is formed by extruding and wrapping the fire-proof layer 4 by using an extruding device. This structure is closely knit, soft, and when the conflagration breaing out, flame retardant coating 5 can the very first time form ceramic flame retardant coating when receiving outside high temperature, prevents the conflagration to the destruction of middling pressure cable, and 5 inner structure of guarantee flame retardant coating are complete effective, increase the life and the security performance of cable.
As an example, the metal sheath layer 6 is made of high-quality copper strips through seamless tube welding and embossing. The metal sheath layer 6 and the fireproof layer 5 achieve excellent fireproof effect together. And the cable also has a certain radial water-blocking effect, so that the service life and the safety performance of the cable are improved.
As an example, the outer sheath 7 is made of a polyethylene material resistant to rats and ants. The weather-resistant polyethylene material has the characteristics of low viscosity, no halogen, light specific gravity, special wear resistance, excellent waterproofness, weather aging resistance and the like, and greatly prolongs the service life of the product.
Therefore, the full water-blocking medium voltage cable provided by the utility model has excellent longitudinal and radial water-blocking performance; also has the advantages of excellent flame retardance, fire resistance, weather resistance and corrosion resistance. The electric demand of very big satisfying present stage is applicable to the abominable environment of laying of multiple environment.
Other structures of the fully water-blocking medium voltage cable described in this embodiment are referred to in the prior art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.
Claims (10)
1. A full water-blocking medium voltage cable is characterized by comprising a composite cable core, a water-blocking layer, an anticorrosive layer, a fireproof layer, a metal sheath layer and an outer sheath which are sequentially arranged from inside to outside;
the composite cable core is formed by stranding a plurality of water-resistant cables, and the water-resistant layer is made of polyethylene material;
and a water-blocking filling layer is arranged in a gap between the composite cable core and the water-blocking layer, and a plurality of prefabricated heat dissipation parts are further arranged in the water-blocking filling layer.
2. The all-water blocking medium voltage cable according to claim 1, characterized in that:
the water-blocking cable comprises a conductive wire core and a semi-conductive water-blocking tape layer wrapping the conductive wire core;
and a water-tight layer is filled in a gap between the conductive wire core and the semi-conductive water-blocking tape layer.
3. The all-water blocking medium voltage cable according to claim 2, characterized in that:
the watertight layer is filled with a semi-conductive watertight composition.
4. The all-water blocking medium voltage cable according to claim 2, characterized in that:
the water-blocking cable also comprises a conductor shielding layer, a conductor insulating layer, an insulating shielding layer and a metal shielding layer which are arranged from inside to outside in sequence; the conductor shielding layer wraps the outer surface of the semi-conductive water blocking tape layer.
5. The all-water blocking medium voltage cable according to claim 4, characterized in that:
the conductor shielding layer is made of a peroxide crosslinking type semi-conductive shielding material for a crosslinked polyethylene insulated cable conductor;
the conductor insulating layer is made of peroxide crosslinked polyethylene insulating material for the crosslinked polyethylene insulated cable;
the insulation shielding layer is made of peroxide crosslinking type semi-conductive shielding material for insulating the crosslinked polyethylene insulated cable;
the metal shielding layer is formed by lapping and wrapping a soft copper tape on the insulating shielding layer in an overlapping mode.
6. The all-water blocking medium voltage cable according to claim 1, characterized in that:
the waterproof filling layer is formed by filling sealant.
7. The all-water blocking medium voltage cable according to claim 1, characterized in that:
the anticorrosive coating is an anticorrosive tape wrapped outside the water-blocking layer.
8. The all-water blocking medium voltage cable according to claim 1, characterized in that:
the fireproof layer is made of fireproof mud.
9. The all-water blocking medium voltage cable according to claim 1, characterized in that:
the metal sheath layer is formed by welding a copper strip.
10. The all-water blocking medium voltage cable according to claim 1, characterized in that:
the prefabricated radiating piece is made of graphite radiating cloth materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921104133.8U CN209880228U (en) | 2019-07-15 | 2019-07-15 | Full-water-blocking medium-voltage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921104133.8U CN209880228U (en) | 2019-07-15 | 2019-07-15 | Full-water-blocking medium-voltage cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209880228U true CN209880228U (en) | 2019-12-31 |
Family
ID=68949131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921104133.8U Active CN209880228U (en) | 2019-07-15 | 2019-07-15 | Full-water-blocking medium-voltage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209880228U (en) |
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2019
- 2019-07-15 CN CN201921104133.8U patent/CN209880228U/en active Active
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