Wear-resistant overhead insulated cable

Abstract

The utility model discloses a wear-resistant overhead insulated cable which has good waterproof performance, high cable strength and strong compression resistance and impact resistance. Comprising a filling layer, cable conductors are arranged in the filling layer, a shielding layer, an inner waterproof layer, an armor layer, a buffer layer, an outer waterproof layer and a corrosion-resistant layer are sequentially arranged on the outer side of the filling layer from inside to outside, a reinforcing strip is arranged in the filling layer, the cable conductors are arranged around the reinforcing strip in a surrounding mode, and the outer waterproof layer is arranged on the outer side of the cable conductors. A reinforcing plate is arranged between every two adjacent cable conductors, the two ends of each reinforcing plate are fixedly connected with the reinforcing strips and the inner surface of the shielding layer respectively, and the inner waterproof layer comprises a water absorbing layer and a water resisting layer which sequentially wrap the outer side of the shielding layer. The outer waterproof layer comprises a damp-proof layer and a water-blocking layer which are sequentially wrapped on the outer side of the buffer layer, a plurality of water-blocking strips are fixedly arranged between the water-blocking layer and the damp-proof layer, and pva collodion is filled between every two adjacent water-blocking strips.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wires and cables, in particular to a wear-resistant overhead insulated cable. Background Art

[0002] Overhead cables (full name: insulated overhead cables) are specialized overhead conductors equipped with insulation and a protective sheath. Manufactured using a process similar to cross-linked cable, they represent a new power transmission method intermediate between overhead conductors and underground cables. They offer key advantages such as high power supply reliability and security, ease of installation and maintenance, and reasonable economic efficiency. Overhead cables are used outdoors, suspended from overhead towers, and therefore require excellent weather and abrasion resistance.

[0003] For example, the Chinese patent with publication number CN219392993U discloses a wear-resistant overhead insulated cable, including a conductor, the surface of the conductor is wrapped with a plastic tape, the surface of the plastic tape is sleeved with a first tension-resistant layer, the surface of the first tension-resistant layer is sleeved with a second tension-resistant layer, the surface of the second tension-resistant layer is wrapped with a flame-retardant tape, the surface of the flame-retardant tape is sleeved with a wear-resistant insulating layer, the first tension-resistant layer is made of aramid fiber material, the second tension-resistant layer is made of glass fiber material, and the flame-retardant tape is made of aluminum foil material; the utility model can effectively increase the tensile strength of the cable by arranging the first tension-resistant layer and the second tension-resistant layer, avoid the problem of breakage caused by strong wind or other environmental factors, and can effectively improve the ductility of the device by arranging the plastic tape, and effectively play a flame-retardant role by arranging the flame-retardant tape.

[0004] However, cables used outdoors are often damaged by various reasons such as animal gnawing, pulling, wind, rain, and sun exposure. Simply increasing the tensile strength of the cable by setting the first tension layer and the second tension layer cannot effectively improve the service life of the cable when used outdoors. At the same time, considering the particularity of its use environment, it is necessary to further improve its wear resistance, corrosion resistance, waterproof performance, and weather and aging resistance to extend its service life. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the defects of the existing technical problems and provide a wear-resistant overhead insulated cable with good waterproof performance, high cable strength, and strong pressure and impact resistance.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a wear-resistant overhead insulated cable, comprising a filling layer, a cable conductor is arranged in the filling layer, and the outer side of the filling layer is provided with a shielding layer, an inner waterproof layer, an armor layer, a buffer layer, an outer waterproof layer and a corrosion-resistant layer from the inside to the outside. A reinforcement strip is provided in the filling layer, and the cable conductor is arranged around the reinforcement strip. A reinforcement plate is provided between two adjacent cable conductors, and the two ends of the reinforcement plate are fixedly connected to the reinforcement strip and the inner surface of the shielding layer respectively. The inner waterproof layer includes a water-absorbing layer and a water-isolating layer wrapped in sequence on the outside of the shielding layer, and the outer waterproof layer includes a moisture-proof layer and a water-blocking layer wrapped in sequence on the outside of the buffer layer. A plurality of water-blocking strips are fixed between the water-blocking layer and the moisture-proof layer, and PVA cotton is filled between two adjacent water-blocking strips.

[0007] Furthermore, the outer side of the cable conductor is wrapped with an insulating sleeve made of PVC material, and the outer side of the insulating sleeve is wrapped with mica tape.

[0008] Furthermore, the reinforcement strip and the reinforcement plate are both made of high-strength rubber.

[0009] Furthermore, the shielding layer is woven from tinned copper wires.

[0010] Furthermore, the water-absorbing layer is made of highly water-absorbent resin, and the water-isolating layer is made of water-blocking aramid yarn.

[0011] Furthermore, the armor layer is formed by spirally winding an aluminum-plastic composite tape.

[0012] Furthermore, a buffer block is provided in the buffer layer, and the buffer block is made of high-elastic rubber.

[0013] Furthermore, the water-blocking layer and the water-blocking strip are both made of polypropylene, and the moisture-proof layer is made of non-woven fabric filled with hydrogel.

[0014] Furthermore, the corrosion-resistant layer is woven from glass fiber and carbon fiber.

[0015] Furthermore, a filler is provided in the filling layer, and the filler is filled between the cable conductor, the reinforcement strip, the reinforcement plate and the shielding layer.

[0016] By adopting the above technical solution, the utility model has the following beneficial effects:

[0017] 1. Set up reinforcement strips and reinforcement plates to improve the overall strength and stability of the cable;

[0018] 2. An inner waterproof layer and an outer waterproof layer are provided, and the multi-layer water-blocking and waterproofing can greatly improve the waterproof performance of the cable. The inner waterproof layer includes a water-absorbing layer wrapped on the outside of the shielding layer and a water-isolating layer wrapped on the outside of the water-absorbing layer. The outer waterproof layer includes a moisture-proof layer and a water-blocking layer. A plurality of water-blocking strips are fixed between the water-blocking layer and the moisture-proof layer, and the space between two adjacent water-blocking strips is filled with PVA cotton.

[0019] 3. The armor layer is made of spirally wound aluminum-plastic composite tape, which has a good waterproof effect and can also play a protective role to prevent knocking pressure;

[0020] 4. A buffer block is provided in the buffer layer. The buffer block is made of highly elastic rubber. When the cable is impacted, the buffer block uses its elastic deformation to decompose the pressure, thereby protecting the internal cable conductor from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the impact-resistant and waterproof cable of the present invention;

[0022] Figure 2 for Figure 1 Magnified view of part A.

[0023] Reference numerals: 1, filling layer; 2, shielding layer; 3, inner waterproof layer; 4, armor layer; 5, buffer layer;

[0024] 6. External waterproof layer; 7. Corrosion-resistant layer; 8. Reinforcement strip; 9. Reinforcement plate; 31. Water-absorbing layer; 32. Water-isolating layer;

[0025] 51. Buffer block; 61. Moisture-proof layer; 62. Water-blocking layer; 63. Water-blocking strip; 64. PVA cotton;

[0026] 100. Cable conductor; 101. Insulation sleeve; 102. Mica tape. DETAILED DESCRIPTION

[0027] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0028] like Figure 1-2 As shown, in this embodiment, a wear-resistant overhead insulated cable is provided, including a filling layer 1, a cable conductor 100 is provided in the filling layer 1, and a shielding layer 2, an inner waterproof layer 3, an armor layer 4, a buffer layer 5, an outer waterproof layer 6 and a corrosion-resistant layer 7 are provided on the outside of the filling layer 1 from the inside to the outside. A reinforcement bar 8 is provided in the filling layer 1, and the cable conductor 100 is arranged around the reinforcement bar 8. A reinforcement plate 9 is provided between two adjacent cable conductors 100, and the two ends of the reinforcement plate 9 are fixedly connected to the reinforcement bar 8 and the inner surface of the shielding layer 2 respectively.

[0029] like Figure 1 As shown, in this embodiment, the outer side of the cable conductor 100 is wrapped with a PVC insulation sleeve 101, which is then wrapped with mica tape 102. Mica tape 102 is a synthetic mica tape with excellent high-temperature and flame-resistance properties. A filler is provided in the filling layer 1, which is filled between the cable conductor 100, the reinforcement strips 8, the reinforcement plate 9, and the shielding layer 2. This makes the structure within the filling layer 1 more compact, improves the overall strength of the cable, and reduces mutual wear between the various components.

[0030] like Figure 1 As shown, in this embodiment, the reinforcing strip 8 and the reinforcing plate 9 are both made of high-strength rubber to improve the overall strength and stability of the cable.

[0031] like Figure 1-2 As shown, in this embodiment, the shielding layer 2 is braided from tinned copper wires.

[0032] like Figure 1-2 As shown, in this embodiment, the inner waterproof layer 3 includes a water-absorbing layer 31 wrapped around the shielding layer 2, and a water-insulating layer 32 wrapped around the water-absorbing layer 31. The water-absorbing layer 31 is made of a superabsorbent resin. Superabsorbent resin is a synthetic resin with hydrophilic groups that absorbs large amounts of water, swells, and retains the water. It is a new functional polymer material that can quickly absorb hundreds of times its own weight in water to form a gel. This gel can retain water without separating under a certain pressure. Furthermore, the cross-linked network structure and hydrogen bonding of the resin itself limit the gel's unlimited expansion.

[0033] like Figure 1-2 As shown, the waterproof layer 32 is made of water-blocking aramid yarn, which has high mechanical tensile strength and water-blocking and moisture-proof properties, and can ensure the water-blocking, moisture-proof and mechanical tensile resistance requirements of the entire cross-section of the cable, with better quality.

[0034] like Figure 1-2 As shown, in this embodiment, the armor layer 4 is formed by spirally winding an aluminum-plastic composite tape. The aluminum-plastic composite tape has a good waterproof effect and can also play a protective role to prevent knocking pressure.

[0035] like Figure 1-2 As shown, in this embodiment, a buffer block 51 is provided in the buffer layer 5. The buffer block 51 is made of highly elastic rubber. When the cable is impacted, the buffer block 51 utilizes its elastic deformation to decompose the pressure, thereby protecting the internal cable conductor 100 from damage.

[0036] like Figure 1-2As shown, in this embodiment, the outer waterproof layer 6 includes a moisture-proof layer 61 and a water-blocking layer 62. A plurality of water-blocking strips 63 are fixed between the water-blocking layer 62 and the moisture-proof layer 61. PVA cotton wool 64 is filled between two adjacent water-blocking strips 63. The PVA cotton wool 64 is a sponge-like elastomer made of polyvinyl alcohol using acetal reaction, which has the advantages of high water absorption, compressive strength, good elasticity, corrosion resistance, etc. The water-blocking layer 62 is wrapped on the outside of the buffer layer 5, and the moisture-proof layer 61 is wrapped on the outside of the water-blocking layer 62. The water-blocking layer 62 and the water-blocking strips 63 are both made of polypropylene. The polypropylene material has good waterproof effect, excellent electrical insulation performance and good chemical resistance; the moisture-proof layer 61 is made of non-woven fabric filled with hydrogel.

[0037] like Figure 1-2 As shown, in this embodiment, the corrosion-resistant layer 7 is woven from glass fiber and carbon fiber, has strong corrosion resistance, and can well protect the cable from corrosion.

[0038] The utility model provides a wear-resistant overhead insulated cable, which has the following advantages: reinforcing strips 8 and reinforcing plates 9 are provided to improve the overall strength and stability of the cable; an inner waterproof layer 3 and an outer waterproof layer 6 are provided, and the multi-layer water-blocking and waterproofing can well improve the waterproof performance of the cable. Specifically, the inner waterproof layer 3 includes a water-absorbing layer 31 wrapped around the outside of the shielding layer 2 and a water-proof layer 32 wrapped around the outside of the water-absorbing layer 31. The water-absorbing layer 31 is made of a highly absorbent resin. The highly absorbent resin can quickly absorb water hundreds of times larger than its own weight to form a gel. The gel can still retain moisture under a certain pressure without separating out; the water-proof layer 32 is made of a water-blocking aramid yarn. The water-blocking aramid yarn has high-strength mechanical tensile resistance and water-blocking and moisture-proof properties, which can ensure the requirements of water-blocking, moisture-proof and mechanical tensile resistance of the entire cross-section of the cable, and the quality is better; the outer waterproof layer 6 includes a moisture-proof layer 61 and a water-proof layer A plurality of water-blocking strips 63 are fixedly arranged between the water-blocking layer 62 and the moisture-proof layer 61, and pva cotton 64 is filled between two adjacent water-blocking strips 63. The pva cotton 64 has the advantages of high water absorption, compressive strength, good elasticity, corrosion resistance, etc.; the water-blocking layer 62 and the water-blocking strips 63 are both made of polypropylene, and the polypropylene material has good waterproof effect, excellent electrical insulation performance and good chemical resistance; the moisture-proof layer 61 is made of non-woven fabric filled with hydrogel; an armor layer 4 is provided, and the armor layer 4 is spirally wound by an aluminum-plastic composite tape, and the aluminum-plastic composite tape has good waterproof effect and can also play a protective role to prevent knocking pressure; a buffer block 51 is provided in the buffer layer 5, and the buffer block 51 is made of high-elastic rubber. When the cable is impacted, the buffer block 51 uses its elastic deformation to decompose the pressure, thereby protecting the internal cable conductor 100 from damage.

[0039] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wear-resistant overhead insulated cable, characterized in that: The invention comprises a filling layer (1), wherein a cable conductor (100) is arranged in the filling layer (1), and the outer side of the filling layer (1) is provided with a shielding layer (2), an inner waterproof layer (3), an armor layer (4), a buffer layer (5), an outer waterproof layer (6) and a corrosion-resistant layer (7) in order from the inside to the outside, and a reinforcing strip (8) is arranged in the filling layer (1), and the cable conductor (100) is arranged around the reinforcing strip (8), and a reinforcing plate (9) is provided between two adjacent cable conductors (100), and both ends of the reinforcing plate (9) are The inner waterproof layer (3) comprises a water-absorbing layer (31) and a water-isolating layer (32) which are sequentially wrapped around the outer side of the shielding layer (2); the outer waterproof layer (6) comprises a water-blocking layer (62) and a moisture-proof layer (61) which are sequentially wrapped around the outer side of the buffer layer (5); a plurality of water-blocking strips (63) are fixedly arranged between the water-blocking layer (62) and the moisture-proof layer (61); and PVA rubber cotton (64) is filled between two adjacent water-blocking strips (63).

2. The wear-resistant overhead insulated cable according to claim 1, characterized in that: The outer side of the cable conductor (100) is wrapped with an insulating sleeve (101) made of PVC material, and the outer side of the insulating sleeve (101) is wrapped with a mica tape (102).

3. The wear-resistant overhead insulated cable according to claim 1, characterized in that: The reinforcing strip (8) and the reinforcing plate (9) are both made of high-strength rubber.

4. The wear-resistant overhead insulated cable according to claim 1, characterized in that: The shielding layer (2) is woven from tinned copper wires.

5. The wear-resistant overhead insulated cable according to claim 1, characterized in that: The water-absorbing layer (31) is made of a highly water-absorbent resin, and the water-isolating layer (32) is made of a water-blocking aramid yarn.

6. The wear-resistant overhead insulated cable according to claim 1, characterized in that: The armor layer (4) is formed by spirally winding an aluminum-plastic composite tape.

7. The wear-resistant overhead insulated cable according to claim 1, characterized in that: A buffer block (51) is provided in the buffer layer (5), and the buffer block (51) is made of high-elasticity rubber.

8. The wear-resistant overhead insulated cable according to claim 1, characterized in that: The water-blocking layer (62) and the water-blocking strip (63) are both made of polypropylene, and the moisture-proof layer (61) is made of non-woven fabric filled with hydrogel.

9. The wear-resistant overhead insulated cable according to claim 1, characterized in that: The corrosion-resistant layer (7) is woven from glass fiber and carbon fiber.

10. The wear-resistant overhead insulated cable according to claim 1, characterized in that: The filling layer (1) is provided with a filler, and the filler is filled between the cable conductor (100), the reinforcement strip (8), the reinforcement plate (9) and the shielding layer (2).

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