CN219435581U - Waterproof and anti-cracking molded line armored cable - Google Patents
Waterproof and anti-cracking molded line armored cable Download PDFInfo
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- CN219435581U CN219435581U CN202320226894.0U CN202320226894U CN219435581U CN 219435581 U CN219435581 U CN 219435581U CN 202320226894 U CN202320226894 U CN 202320226894U CN 219435581 U CN219435581 U CN 219435581U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The utility model relates to the technical field of cables, in particular to a water-blocking and cracking-resistant molded line armored cable, which comprises a plurality of cable cores, wherein the cable cores are stranded right to form a cable, round filling is carried out between stranded middle and peripheral gaps of the cable cores through a filling layer, a water-blocking belt is wrapped outside the cable cores and the filling layer, a waterproof layer is wrapped outside the water-blocking belt, and an armor layer, a cushion layer and a sheath layer are sequentially wrapped outside the waterproof layer from inside to outside; the cable core comprises a conductor, wherein a water-resistant layer is wrapped outside the conductor, and an insulating layer is wrapped outside the water-resistant layer; the conductor adopts a first copper, aluminum or aluminum alloy conductor required by GB/T3956-2008 standard, the central monofilament of the conductor is circular, and the periphery of the conductor adopts special-shaped monofilaments to be mutually spliced in a seamless manner to form a circular structure.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a waterproof and anti-cracking molded line armored cable.
Background
The power cable is mainly used for transmitting electric energy, and laid environmental conditions include underground direct burial, underground pipelines, air, water crossing rivers, mines, high altitudes, salt mist, large height difference, multiple movement, tidal zone and the like. The common plastic insulated cable has poor waterproof performance, and if the cable is water-in, the phenomenon of 'water tree aging' can occur, and finally the cable breakdown is caused, so that the service life of the cable is influenced. In order to solve the problem of poor waterproof performance of a common plastic cable and simultaneously meet the cracking-resistant requirement of a customer cable, the utility model provides a waterproof cracking-resistant molded line conductor armored cable.
Disclosure of Invention
The utility model aims to provide a waterproof and anti-cracking molded line armored cable, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a water-blocking, anti-cracking molded line armoured cable which characterized in that: the cable comprises a plurality of cable cores, wherein the cable cores are twisted right to form a cable, round filling is carried out between the middle and peripheral gaps of the twisting of the cable cores through a filling layer 4, a water blocking belt 5 is wrapped outside the cable cores and the filling layer 4, a waterproof layer 6 is wrapped outside the water blocking belt 5, and an armor layer 7, a cushion layer 8 and a sheath layer 9 are sequentially wrapped outside the waterproof layer 6 from inside to outside;
the cable core comprises a conductor 1, wherein a water-resistant layer 2 is wrapped outside the conductor 1, and an insulating layer 3 is wrapped outside the water-resistant layer 2; the conductor 1 adopts a 2 nd copper, aluminum or aluminum alloy conductor required by GB/T3956-2008 standard, the central monofilament of the conductor is circular, and the periphery of the conductor adopts special-shaped monofilaments to be mutually spliced in a seamless manner to form a circular structure.
The conductor 1 can be spliced in a seamless manner according to the size of the section, the special-shaped monofilaments can be overlapped in multiple layers, the shapes of the monofilaments of each layer are different, and finally, a firm and firm stranded conductor is formed by the spliced structure through a correction die, so that the filling coefficient of the conductor can reach 0.98, and the compactness and the longitudinal water resistance of the conductor are greatly improved.
When the sectional areas of the conductors are the same, compared with the conventional circular conductor, the external diameter of the molded line conductor is reduced by 7-12%, the consumption of insulating layers and other protective layer materials is greatly reduced, and the cost is saved. The surface of the stranded conductor is uniform, compact and smooth, and has no defects of greasy dirt, burrs, sharp edges, scratches, bulges and the like, and the appearance is similar to that of a solid conductor. In the conductor twisting process, water-blocking expansion powder is uniformly coated, and when the conductor end meets water, the water-blocking expansion powder can rapidly expand to fill gaps of the conductor section, so that water cannot longitudinally infiltrate along the conductor gaps to generate a series of irreversible degradation reactions such as oxidation and the like.
The water blocking layer 2 is wrapped by a semiconductive water blocking tape, and the semiconductive water blocking tape has the characteristics of strong hygroscopicity and high expansion rate, can be rapidly expanded when meeting water, and fills up gaps; meanwhile, the mechanical strength is high, the heat resistance is good, and the wrapping is easy. Wherein the water-resistant layer is lapped around the lapping cover to be 10% -15% of the width of the strip.
The insulating layer 3 is formed by irradiating and crosslinking polyolefin insulating materials at 125 ℃, and the extruded insulating layer is irradiated and crosslinked by an electron accelerator. The insulating layer is irradiated and crosslinked to prolong the ageing resistance life of the insulating layer, so that the service life is prolonged, the insulating material is an environment-friendly material, and when a fire disaster occurs, no dense smoke is generated, no halogen-containing toxic gas is released, so that the purposes of environmental protection and health are achieved.
The filling layer 4 is water-blocking yarn.
The water-blocking tape 5 is covered with 15% -25% of the width of the tape.
The waterproof layer 6 adopts an aluminum-plastic composite belt, and the aluminum-plastic composite belt is externally and tightly extruded with an environment-friendly high-density polyethylene sheath and fixedly connected with the aluminum-plastic composite belt layer into a whole. The overlapping cover of the aluminum-plastic composite belt is 20% -30% of the width of the belt material, and the aluminum-plastic composite belt is firmly welded by hot air. The surface of the sheath should be smooth and flat, and no sharp corners, pits, burnt or scratched marks are required, and the cross section has no defects such as bubbles, sand holes and the like which are visible by eyes.
The armor layer 7 adopts galvanized steel strips, the galvanized steel strips are armored by two layers of spiral wrapping, the middle part of the outer metal strip is approximately above the gap of the inner metal strip, and the gap rate of each metal strip is not more than 50%. The steel strip armor is wrapped by the water-blocking cushion layer to separate the armor layer from the sheath layer, so that on one hand, when the cable is bent, the steel strip incision directly contacts the sheath layer to cause stress concentration and crack of the sheath; and simultaneously, the waterproof performance of the cable is improved. The lapping water-blocking tape is lapped to be 30% -40% of the width of the tape.
The sheath layer 9 adopts TPE thermoplastic elastomer, TPE is a high polymer material which has the characteristics of both plastics and rubber, shows the high elasticity of rubber at normal temperature and can be plasticized and molded at high temperature. TPE thermoplastic elastomer products have excellent waterproof performance, are used as cable sheath materials, and increase product softness while being waterproof. The TPE sheath is extruded by a plastic extruder, the surface of the extruded sheath is smooth and flat, no sharp corners, pits, burnt or scratch marks are required, and the cross section has no defects such as bubbles, sand holes and the like which are visible by eyes.
The beneficial effects of the utility model are as follows:
the design of the structure of the water-blocking and cracking-resistant molded line conductor armored cable can meet the requirements of users on water blocking and water resistance of the cable; meanwhile, the requirement of crack resistance of the sheath can be met for the armored cable. The water resistance of the cable is fundamentally ensured by the molded line conductor structure and the water resistance layer; the use of the water blocking yarns and the water blocking tape prevents water from invading the insulating layer during cabling; the waterproof performance of the cable is firmer due to the structural design of the aluminum-plastic composite out-of-band extrusion environment-friendly high-density polyethylene sheath waterproof layer, and the waterproof performance of the cable is ensured due to the design of the multi-layer waterproof structure; the design of the outer cushion layer structure of the armor layer enables the cable to have good cracking resistance; the TPE thermoplastic elastomer sheath is waterproof and improves the flexibility of the cable.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
in the figure: 1 conductor, water-resistant layer 2, insulating layer 3, filling layer 4, water-resistant tape 5, waterproof layer 6, armor layer 7, cushion 8, restrictive coating 9.
Detailed Description
The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.
Example 1
The water-blocking and cracking-resistant molded line armored cable comprises a plurality of cable cores, wherein the cable cores are twisted right to form a cable, round gaps between the middle and peripheral gaps of the twisting of the cable cores are filled with a filling layer 4, a water blocking belt 5 is wrapped outside the cable cores and the filling layer 4, a waterproof layer 6 is wrapped outside the water blocking belt 5, and an armor layer 7, a cushion layer 8 and a sheath layer 9 are sequentially wrapped outside the waterproof layer 6 from inside to outside;
the cable core comprises a conductor 1, wherein a water-resistant layer 2 is wrapped outside the conductor 1, and an insulating layer 3 is wrapped outside the water-resistant layer 2; the conductor 1 adopts a 2 nd copper, aluminum or aluminum alloy conductor required by GB/T3956-2008 standard, the central monofilament of the conductor is circular, and the periphery of the conductor adopts special-shaped monofilaments to be mutually spliced in a seamless manner to form a circular structure.
The conductor 1 can be spliced in a seamless manner according to the size of the section, the special-shaped monofilaments can be overlapped in multiple layers, the shapes of the monofilaments of each layer are different, and finally, a firm and firm stranded conductor is formed by the spliced structure through a correction die, so that the filling coefficient of the conductor can reach 0.98, and the compactness and the longitudinal water resistance of the conductor are greatly improved.
When the sectional areas of the conductors are the same, compared with the conventional circular conductor, the external diameter of the molded line conductor is reduced by 7-12%, the consumption of insulating layers and other protective layer materials is greatly reduced, and the cost is saved. The surface of the stranded conductor is uniform, compact and smooth, and has no defects of greasy dirt, burrs, sharp edges, scratches, bulges and the like, and the appearance is similar to that of a solid conductor. In the conductor twisting process, water-blocking expansion powder is uniformly coated, and when the conductor end meets water, the water-blocking expansion powder can rapidly expand to fill gaps of the conductor section, so that water cannot longitudinally infiltrate along the conductor gaps to generate a series of irreversible degradation reactions such as oxidation and the like.
Example two
The water blocking layer 2 is wrapped by a semiconductive water blocking tape, and the semiconductive water blocking tape has the characteristics of strong hygroscopicity and high expansion rate, can be rapidly expanded when meeting water, and fills up gaps; meanwhile, the mechanical strength is high, the heat resistance is good, and the wrapping is easy. Wherein the water-resistant layer is lapped around the lapping cover to be 10% -15% of the width of the strip.
The insulating layer 3 is formed by irradiating and crosslinking polyolefin insulating materials at 125 ℃, and the extruded insulating layer is irradiated and crosslinked by an electron accelerator. The insulating layer is irradiated and crosslinked to prolong the ageing resistance life of the insulating layer, so that the service life is prolonged, the insulating material is an environment-friendly material, and when a fire disaster occurs, no dense smoke is generated, no halogen-containing toxic gas is released, so that the purposes of environmental protection and health are achieved.
The filling layer 4 is water-blocking yarn.
The water-blocking tape 5 is covered with 15% -25% of the width of the tape.
The waterproof layer 6 adopts an aluminum-plastic composite belt, and the aluminum-plastic composite belt is externally and tightly extruded with an environment-friendly high-density polyethylene sheath and fixedly connected with the aluminum-plastic composite belt layer into a whole. The overlapping cover of the aluminum-plastic composite belt is 20% -30% of the width of the belt material, and the aluminum-plastic composite belt is firmly welded by hot air. The surface of the sheath should be smooth and flat, and no sharp corners, pits, burnt or scratched marks are required, and the cross section has no defects such as bubbles, sand holes and the like which are visible by eyes.
The armor layer 7 adopts galvanized steel strips, the galvanized steel strips are armored by two layers of spiral wrapping, the middle part of the outer metal strip is approximately above the gap of the inner metal strip, and the gap rate of each metal strip is not more than 50%. The steel strip armor is wrapped by the water-blocking cushion layer to separate the armor layer from the sheath layer, so that on one hand, when the cable is bent, the steel strip incision directly contacts the sheath layer to cause stress concentration and crack of the sheath; and simultaneously, the waterproof performance of the cable is improved. The lapping water-blocking tape is lapped to be 30% -40% of the width of the tape.
The sheath layer 9 adopts TPE thermoplastic elastomer, TPE is a high polymer material which has the characteristics of both plastics and rubber, shows the high elasticity of rubber at normal temperature and can be plasticized and molded at high temperature. TPE thermoplastic elastomer products have excellent waterproof performance, are used as cable sheath materials, and increase product softness while being waterproof. The TPE sheath is extruded by a plastic extruder, the surface of the extruded sheath is smooth and flat, no sharp corners, pits, burnt or scratch marks are required, and the cross section has no defects such as bubbles, sand holes and the like which are visible by eyes.
Example III
The process scheme of the utility model comprises the following steps:
1) A conductor: the 2 nd copper, aluminum or aluminum alloy conductor required by GB/T3956-2008 standard is adopted, the central monofilament of the conductor is round, and the periphery of the conductor is formed by mutually seamless splicing of special-shaped monofilaments into a round structure. And water-blocking expansion powder is uniformly coated in the conductor twisting process.
2) Water blocking layer: a semiconductive buffer water blocking tape is used.
3) Insulation: the polyolefin insulation is cross-linked by irradiation at 125 ℃.
4) Filling and wrapping: and filling the gaps of the cable cores with water blocking yarns, and wrapping the water blocking tapes outside the cable cores.
5) Waterproof layer: an aluminum-plastic composite out-of-band extrusion environment-friendly high-density polyethylene sheath is adopted.
6) Armor: galvanized steel strip.
7) Cushion layer: a semiconductive buffer water blocking tape is used.
8) An outer sheath: TPE thermoplastic elastomer materials are used.
The above-described embodiments are merely a few preferred embodiments of the present utility model, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present utility model and the related teachings of the above-described embodiments.
Claims (9)
1. The utility model provides a water-blocking, anti-cracking molded line armoured cable which characterized in that: the cable comprises a plurality of cable cores, wherein the cable cores are twisted right to form a cable, round filling is performed between the middle and peripheral gaps of the twisting of the cable cores through a filling layer (4), a water blocking belt (5) is wrapped outside the cable cores and the filling layer (4), a waterproof layer (6) is wrapped outside the water blocking belt (5), and an armor layer (7), a cushion layer (8) and a sheath layer (9) are sequentially wrapped outside the waterproof layer (6) from inside to outside;
the cable core comprises a conductor (1), wherein a water-resistant layer (2) is wrapped outside the conductor (1), and an insulating layer (3) is wrapped outside the water-resistant layer (2); the conductor (1) adopts a 2 nd copper, aluminum or aluminum alloy conductor required by GB/T3956-2008 standard, a central monofilament of the conductor is circular, and the periphery of the conductor adopts special-shaped monofilaments to be mutually spliced into a circular structure in a seamless manner.
2. A water-resistant and crack-resistant molded line armored cable as claimed in claim 1, wherein: the conductor (1) can be spliced in a seamless mode according to the size of the section, the special-shaped monofilaments can be overlapped in multiple layers, the shapes of the monofilaments of each layer are different, and finally, a firm and firm stranded conductor is formed by the spliced structure through a correction die.
3. A water-resistant and crack-resistant molded line armored cable as claimed in claim 2, wherein: the water blocking layer (2) adopts a semiconductor water blocking belt.
4. A water-resistant and crack-resistant wire-armoured cable as claimed in claim 3, characterized in that: the insulating layer (3) is formed by irradiating and crosslinking polyolefin insulating material at 125 ℃, and the extruded insulating layer is formed by irradiating and crosslinking by using an electron accelerator.
5. The water-resistant and crack-resistant molded line armored cable of claim 4, wherein: the filling layer (4) is water-blocking yarn.
6. The water-resistant and crack-resistant molded line armored cable of claim 5, wherein: the water-blocking tape (5) is covered with 15% -25% of the width of the tape.
7. The water-resistant and crack-resistant molded line armored cable of claim 6, wherein: the waterproof layer (6) adopts an aluminum-plastic composite belt, and the aluminum-plastic composite belt is tightly extruded with a layer of environment-friendly high-density polyethylene sheath and fixedly connected with the aluminum-plastic composite belt layer into a whole.
8. The water-resistant and crack-resistant molded line armored cable of claim 7, wherein: the armor layer (7) adopts galvanized steel strips, the galvanized steel strip armor should be spirally wrapped for two layers, so that the middle part of the outer metal strip is approximately above the gap of the inner metal strip, and the gap rate of each metal strip is not more than 50%.
9. The water-resistant and crack-resistant molded line armored cable of claim 8, wherein: the sheath layer (9) adopts TPE thermoplastic elastomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320226894.0U CN219435581U (en) | 2023-02-16 | 2023-02-16 | Waterproof and anti-cracking molded line armored cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320226894.0U CN219435581U (en) | 2023-02-16 | 2023-02-16 | Waterproof and anti-cracking molded line armored cable |
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| Publication Number | Publication Date |
|---|---|
| CN219435581U true CN219435581U (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320226894.0U Active CN219435581U (en) | 2023-02-16 | 2023-02-16 | Waterproof and anti-cracking molded line armored cable |
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| Country | Link |
|---|---|
| CN (1) | CN219435581U (en) |
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- 2023-02-16 CN CN202320226894.0U patent/CN219435581U/en active Active
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