Long-life aluminum core water-blocking cable

Abstract

The utility model provides a long-service-life aluminum core water-blocking cable which comprises a wire core, a wrapping layer set wrapping the periphery of the wire core, an armor layer wrapping the periphery of the wrapping layer set and a sheath layer wrapping the periphery of the armor layer, the wire core is formed by twisting a plurality of conductors, each conductor is formed by twisting a plurality of aluminum cores and a plurality of aluminum alloy conductors, and the sheath layer is arranged between the aluminum cores and the aluminum alloy conductors. The aluminum cores and the aluminum alloy conductors are selected as the wire cores of the water-blocking cable, the overall ductility of the cable is improved, in the actual use process, in the stretching and bending process, mechanical aging of all layered structures of the cable is not likely to happen, the water-blocking performance of the cable is improved by wrapping the periphery of the wire cores with the wrapping layer sets formed by the multiple wrapping layers, and the service life of the cable is prolonged. The insulation resistance constant of the cable is improved, so that the cable has excellent water-blocking performance, the heating value of the cable is low when the cable is used for a long time, each layered structure is not easy to age and damage, and the cable has the advantages of being long in service life, low in implementation cost, simple in structure, high in safety coefficient, not easy to leak electricity and convenient to popularize and implement.

Description

Technical Field

[0001] This application belongs to the technical field of cable production, and particularly relates to a long-life aluminum core water-blocking cable. Background Art

[0002] In the prior art, water-blocking cables are mainly used for buried laying to connect high-voltage electrical equipment, and are widely used in urban and rural power distribution network systems. They have the advantages of simple structure, safety and reliability, can reduce power supply accidents, and ensure personal safety.

[0003] In the prior art, water-blocking cables often include a conductor layer, an insulating layer, a filling layer, a tape layer, and a sheath layer. Among them, the conductor materials used in the existing conductor layer have poor ductility, are not easy to stretch and bend, and the various layered structures are prone to mechanical aging during the winding process. The existing insulating layer has a low temperature resistance grade, and the filling layer has a strong water absorption capacity. When passing a large current for a long time, the materials of the various layered structures are prone to aging, the insulation resistance constant of the cable insulating layer decreases, the various layered structures are prone to breakage, and there is a risk of leakage in the actual implementation process, and the service life of the cable is relatively low. Therefore, improvements are urgently needed now. Summary of the Utility Model

[0004] This application aims to solve the technical problems in the prior art that the conductor layer of the water-blocking cable has poor ductility, the various layered structures are prone to mechanical aging during the winding process, the insulating layer has a low temperature resistance grade, the filling layer has strong water absorption, the cable generates serious heat after being energized, the various layered structures are prone to aging, the insulation resistance constant of the cable insulating layer decreases, the various layered structures are prone to cracking and breakage, there is a risk of leakage during the use of the cable, and the service life of the cable is relatively low, and proposes a long-life aluminum core water-blocking cable.

[0005] This application adopts the following scheme: a long-life aluminum core water-blocking cable includes a core, a wrapping layer group wrapped around the outer periphery of the core, an armor layer wrapped around the outer periphery of the wrapping layer group, and a sheath layer wrapped around the outer periphery of the armor layer. The core is formed by stranding a plurality of conductors, and each conductor is formed by stranding a plurality of aluminum cores and a plurality of aluminum alloy conductors.

[0006] Furthermore, the elongation rate A of the aluminum alloy conductor satisfies the following relationship: 18% ≤ A ≤ 22%. During the stranding process of the plurality of aluminum cores and the plurality of aluminum alloy conductors, the stranding direction is left-handed. During the stranding process of the plurality of conductors, the stranding direction is left-handed.

[0007] Furthermore, an insulating layer is wrapped around the outer periphery of each conductor, and the material of the insulating layer is cross-linked polyethylene with an environmental protection temperature of 125 degrees.

[0008] Further, a water blocking filler is filled between the insulating layer and the wrapping layer group, and the filling degree B of the water blocking filler between the insulating layer and the wrapping layer group satisfies the following relationship: 83% ≤ B ≤ 91%.

[0009] Further, the material of the water blocking filler is any one of polyurethane rubber, butyl rubber, silicone rubber, styrene-butadiene rubber, and ethylene-propylene rubber.

[0010] Further, the wrapping layer group includes a first wrapping layer covering the outer periphery of the core, and a second wrapping layer covering the outer periphery of the first wrapping layer. The thickness C of the first wrapping layer and the thickness D of the second wrapping layer satisfy the following relationship: 0.5 cm ≤ C ≤ 1.2 cm, 0.8 cm ≤ D ≤ 1.5 cm.

[0011] Further, the material of the first wrapping layer is polyester tape, and the material of the second wrapping layer is polyethylene tape.

[0012] Further, the material of the armor layer is galvanized steel strip, and the thickness E of the armor layer satisfies the following relationship: 1.3 cm ≤ E ≤ 2.2 cm.

[0013] Further, the material of the sheath layer is low-smoke and halogen-free irradiated cross-linked polyolefin at 125 degrees of environmental protection.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] The present application provides a long-life aluminum core water blocking cable, which includes a core, a wrapping layer group covering the outer periphery of the core, an armor layer covering the outer periphery of the wrapping layer group, and a sheath layer covering the outer periphery of the armor layer. The core is formed by stranding a plurality of conductors, and each conductor is formed by stranding a plurality of aluminum cores and a plurality of aluminum alloy conductors. By selecting aluminum cores and aluminum alloy conductors as the core of the water blocking cable, the overall ductility of the cable is improved. During actual use, it is not easy to cause mechanical aging of each layer structure of the cable during the stretching and bending processes. By covering the outer periphery of the core with a wrapping layer group composed of a plurality of wrapping layers, the water blocking performance of the cable is improved, and the insulation resistance constant of the cable is increased. During long-term use, the cable has good ductility, is not easy to be damaged during the bending process, has excellent water blocking performance, has a low calorific value during long-term use, each layer structure is not easy to age and be damaged, has the advantages of high service life, low implementation cost, simple structure, high safety factor, not easy to leak electricity, and is convenient for popularization and implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments.

[0017] Figure 1It is a schematic cross-sectional structure diagram of a long-life aluminum-core water-blocking cable of the present application. Detailed implementation mode

[0018] Combined as Figure 1 As shown, the present technical solution is further described. A long-life aluminum-core water-blocking cable includes a core 1, a wrapping layer group 2 wrapped around the outer periphery of the core 1, an armor layer 3 wrapped around the outer periphery of the wrapping layer group 2, and a sheath layer 4 wrapped around the outer periphery of the armor layer 3. The core 1 is formed by stranding a plurality of conductors 10, and each conductor 10 is formed by stranding a plurality of aluminum cores 11 and a plurality of aluminum alloy conductors 12.

[0019] The present application provides a long-life aluminum-core water-blocking cable, which includes a core, a wrapping layer group wrapped around the outer periphery of the core, an armor layer wrapped around the outer periphery of the wrapping layer group, and a sheath layer wrapped around the outer periphery of the armor layer. The core is formed by stranding a plurality of conductors, and each conductor is formed by stranding a plurality of aluminum cores and a plurality of aluminum alloy conductors. By selecting aluminum cores and aluminum alloy conductors as the core of the water-blocking cable, the overall ductility of the cable is improved. During actual use, it is not easy to cause mechanical aging of each layer structure of the cable during the stretching and bending processes. By wrapping a wrapping layer group composed of a plurality of wrapping layers around the outer periphery of the core, the water-blocking performance of the cable is improved, and the insulation resistance constant of the cable is increased. During long-term use, the cable has good ductility, is not easy to be damaged during bending, has excellent water-blocking performance, has a low heat generation rate during long-term use, each layer structure is not easy to age and be damaged, has a high service life, low implementation cost, simple structure, high safety factor, is not easy to leak electricity, and is convenient for popularization and implementation.

[0020] During the implementation of this embodiment, the elongation rate A of the aluminum alloy conductor 12 satisfies the following relationship: 18% ≤ A ≤ 22%. During the stranding process of the plurality of aluminum cores 11 and the plurality of aluminum alloy conductors 12, the stranding direction is leftward. During the stranding process of the plurality of conductors 10, the stranding direction is leftward.

[0021] During actual implementation, the elongation rate of the aluminum alloy conductor is 19.3%. Each conductor is formed by stranding two aluminum cores and six aluminum alloy conductors, and the core is formed by stranding three conductors.

[0022] By stranding the aluminum cores and the aluminum alloy conductors to obtain the conductor, the ductility and tensile strength of the conductor are improved, thereby improving the overall mechanical performance of the cable. During the bending process of the cable, it is not easy to damage its each layer structure, and it is not easy to cause damage to each layer structure of the cable. It has the advantages of high service life, low implementation cost, simple structure, high safety factor, not easy to leak electricity, and convenient for popularization and implementation.

[0023] During the implementation of this embodiment, an insulating layer 5 is wrapped around the outer periphery of each conductor 10, and the material of the insulating layer 5 is cross-linked polyethylene with an environmental protection temperature of 125 degrees.

[0024] In the actual implementation process, by selecting cross-linked polyethylene as the insulating layer, it has a high temperature resistance grade, high insulation resistance. After being energized for a long time, the insulating layer is not easily aged. When it is coated on the outer periphery of the conductor, the insulating layer is not easily damaged, and the cable is not easily leaked during actual use, and the service life of the cable is high.

[0025] In the implementation process of this embodiment, a water-blocking filler 6 is further filled between the insulating layer 5 and the wrapping layer group 2, and the filling degree B of the water-blocking filler 6 between the insulating layer 5 and the wrapping layer group 2 satisfies the following relationship: 83% ≤ B ≤ 91%.

[0026] In the actual implementation process, the filling degree B of the water-blocking filler between the insulating layer and the wrapping layer group is 85%.

[0027] In the implementation process of this embodiment, the material of the water-blocking filler 6 is any one of polyurethane rubber, butyl rubber, silicone rubber, styrene-butadiene rubber, and ethylene-propylene rubber.

[0028] In the actual implementation process, the water-blocking filler is polyurethane rubber. On the one hand, by selecting polyurethane rubber as the water-blocking filler, the hydrophobic performance inside the cable can be effectively improved. On the other hand, polyurethane rubber has strong filling performance and high elasticity. When filled inside the cable, it can effectively improve the softness of the cable and enhance the overall mechanical performance of the cable, so that during the bending process of the cable, each layer structure is not easily mechanically aged and damaged, and the service life of the cable is improved.

[0029] In the implementation process of this embodiment, the wrapping layer group 2 includes a first wrapping layer 20 coated on the outer periphery of the core 1, and a second wrapping layer 21 coated on the outer periphery of the first wrapping layer 20. The thickness C of the first wrapping layer 20 and the thickness D of the second wrapping layer 21 satisfy the following relationship: 0.5 cm ≤ C ≤ 1.2 cm, 0.8 cm ≤ D ≤ 1.5 cm.

[0030] In the actual implementation process, the thickness C of the first wrapping layer is 0.7 cm, and the thickness D of the second wrapping layer is 1.1 cm.

[0031] In the implementation process of this embodiment, the material of the first wrapping layer 20 is polyester tape, and the material of the second wrapping layer 21 is polyethylene tape.

[0032] In the actual implementation process, by selecting polyester tape as the first wrapping layer, on the one hand, it can protect the cable from external physical damage and chemical corrosion. On the other hand, the polyester tape can also play a shielding role to reduce the influence of external electromagnetic interference on the cable signal. Finally, it can also improve the cable structure to avoid the wire from loosening during use.

[0033] During the implementation of this embodiment, the material of the armor layer 3 is galvanized steel strip, and the thickness E of the armor layer 3 satisfies the following relationship: 1.3 cm ≤ E ≤ 2.2 cm.

[0034] During the actual implementation process, the thickness E of the armor layer is 1.4 cm, which can ensure the pressure-bearing performance of the cable when buried underground.

[0035] During the implementation of this embodiment, the material of the sheath layer 4 is low-smoke and halogen-free irradiated cross-linked polyolefin with an environmental protection temperature of 125 degrees.

[0036] During the actual implementation process, the low-smoke and halogen-free irradiated cross-linked sheath material with an environmental protection temperature of 125 degrees is a material that is corrosion-resistant and resistant to long-term aging, and can effectively improve the anti-aging and corrosion-resistant performance of the cable.

[0037] This application provides a long-life aluminum core water-blocking cable, which includes a core, a wrapping layer group wrapped around the outer periphery of the core, an armor layer wrapped around the outer periphery of the wrapping layer group, and a sheath layer wrapped around the outer periphery of the armor layer. The core is formed by stranding multiple conductors, and each conductor is formed by stranding multiple aluminum cores and multiple aluminum alloy conductors. By selecting aluminum cores and aluminum alloy conductors as the core of the water-blocking cable, the overall ductility of the cable is improved. During actual use, the mechanical aging of the various layered structures of the cable is not easily caused during the stretching and bending processes. By wrapping a wrapping layer group composed of multiple wrapping layers around the outer periphery of the core, the water-blocking performance of the cable is improved, and the insulation resistance constant of the cable is increased. During long-term use, the cable has good ductility, is not easily damaged during the bending process, has excellent water-blocking performance, has a low heat generation during long-term use, the various layered structures are not easily aged and damaged, has a high service life, a low implementation cost, a simple structure, a high safety factor, is not easily leaked, and is convenient for popularization and implementation.

[0038] The above are the embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A long-life water-blocking cable with an aluminum core, characterized in that It includes a conductor core (1), a wrapping layer group (2) wrapped around the outer periphery of the conductor core (1), an armor layer (3) wrapped around the outer periphery of the wrapping layer group (2), and a sheath layer (4) wrapped around the outer periphery of the armor layer (3). The conductor core (1) is formed by stranding a plurality of conductors (10), and each conductor (10) is formed by stranding a plurality of aluminum cores (11) and a plurality of aluminum alloy conductors (12).

2. The long-life aluminum-core water-blocking cable according to claim 1, wherein The elongation rate A of the aluminum alloy conductor (12) satisfies the following relationship: 18% ≤ A ≤ 22%. During the stranding process of the plurality of aluminum cores (11) and the plurality of aluminum alloy conductors (12), the stranding direction is leftward. During the stranding process of the plurality of conductors (10), the stranding direction is leftward.

3. A long-life aluminum-core water-blocking cable according to claim 1, characterized in that, An insulating layer (5) is wrapped around the outer periphery of each conductor (10), and the material of the insulating layer (5) is cross-linked polyethylene with an environmental protection temperature of 125 degrees.

4. A long-life aluminum-core water-blocking cable according to claim 3, characterized in that, A water blocking filler (6) is also filled between the insulating layer (5) and the wrapping layer group (2), and the filling degree B of the water blocking filler (6) between the insulating layer (5) and the wrapping layer group (2) satisfies the following relationship: 83% ≤ B ≤ 91%.

5. The long-life aluminum-core water-blocking cable according to claim 4, characterized in that, The material of the water blocking filler (6) is any one of polyurethane rubber, butyl rubber, silicone rubber, styrene-butadiene rubber, and ethylene-propylene rubber.

6. A long-life aluminum-core water-blocking cable according to claim 1, characterized in that, The wrapping layer group (2) includes a first wrapping layer (20) wrapped around the outer periphery of the conductor core (1), and a second wrapping layer (21) wrapped around the outer periphery of the first wrapping layer (20). The thickness C of the first wrapping layer (20) and the thickness D of the second wrapping layer (21) satisfy the following relationship: 0.5 cm ≤ C ≤ 1.2 cm, 0.8 cm ≤ D ≤ 1.5 cm.

7. The long-life aluminum-core water-blocking cable according to claim 6, characterized in that, The material of the first wrapping layer (20) is polyester tape, and the material of the second wrapping layer (21) is polyethylene tape.

8. The long-life aluminum-core water-blocking cable according to claim 1, wherein, The material of the armor layer (3) is galvanized steel strip, and the thickness E of the armor layer (3) satisfies the following relationship: 1.3 cm ≤ E ≤ 2.2 cm.

9. A long-life aluminum-core water-blocking cable according to claim 1, characterized in that, The material of the sheath layer (4) is low-smoke and halogen-free irradiated cross-linked polyolefin with an environmental protection temperature of 125 degrees.

Images