Low-voltage cold-resistant longitudinal water-blocking power cable

Abstract

The utility model belongs to the technical field of power cables, and particularly relates to a low-voltage cold-resistant longitudinal water-blocking power cable which comprises a plurality of conductors, the outer walls of the conductors are fixedly connected with first shielding layers, the outer walls of the first shielding layers are fixedly connected with first waterproof layers, the outer walls of the first waterproof layers are fixedly connected with first insulating layers, and the outer walls of the first insulating layers are fixedly connected with second insulating layers. The outer wall of the first insulating layer is fixedly connected with a first protective layer, the outer wall of the first protective layer is fixedly connected with a filling layer, and the outer wall of the filling layer is fixedly connected with a waterproof layer. According to the utility model, the cold-resistant insulating material cross-linked polyethylene is adopted to ensure that the cable can still keep good flexibility and elasticity and is not easy to harden or embrittle in a low-temperature environment, the water-blocking tape is adopted for longitudinal water blocking to effectively prevent water from longitudinally permeating along the cable, once the water-blocking tape is in contact with the water, the water-blocking tape can be quickly absorbed and expanded, and the water-blocking tape is not easy to deform. The moisture is effectively prevented from spreading in the cable, and the insulation material in the cable is ensured not to be damaged by the moisture.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a low-voltage cold-resistant longitudinal water-blocking power cable. Background Art

[0002] Low-voltage cold-resistant longitudinal water-blocking power cables are mainly suitable for scenarios that require operation in low-temperature environments, especially in cold rural areas, wind power stations, solar energy equipment, sewage treatment equipment, electronic security monitoring equipment, oil drilling equipment, metallurgy and minerals, field exploration equipment, etc. These cables are designed to work normally at temperatures of -40℃ or even lower, meeting the power transmission needs in cold areas or special environments.

[0003] Traditional low-voltage power cables are susceptible to moisture intrusion in cold environments, which causes the cable insulation performance to deteriorate and affects the stability and safety of power transmission. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a low-voltage cold-resistant longitudinal water-blocking power cable, which solves the problem that traditional low-voltage power cables are easily invaded by moisture in cold environments, resulting in a decrease in cable insulation performance and affecting the stability and safety of power transmission.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-voltage cold-resistant longitudinal water-blocking power cable, comprising a plurality of conductors, the outer wall of the conductor is fixedly connected with a first shielding layer, the outer wall of the first shielding layer is fixedly connected with a first waterproof layer, the outer wall of the first waterproof layer is fixedly connected with a first insulating layer, the outer wall of the first insulating layer is fixedly connected with a first protective layer, the outer wall of the first protective layer is fixedly connected with a filling layer, the outer wall of the filling layer is fixedly connected with a water-blocking layer, the outer wall of the water-blocking layer is fixedly connected with a second waterproof layer, the outer wall of the second waterproof layer is fixedly connected with a second shielding layer, the outer wall of the second shielding layer is fixedly connected with an outer sheath layer, and the outer wall of the outer sheath layer is fixedly connected with a second protective layer.

[0006] As a preferred technical solution of the present utility model, the conductor is made of a tube, and the first shielding layer is made of a metal foil.

[0007] As a preferred technical solution of the utility model, the material of the first waterproof layer is EPDM rubber, and the material of the first insulating layer is cross-linked polyethylene.

[0008] As a preferred technical solution of the utility model, the material of the first protective layer is silicone rubber, and the material of the filling layer is polypropylene.

[0009] As a preferred technical solution of the utility model, the material of the water-blocking layer is a water-blocking tape, and the material of the second waterproof layer is silica gel.

[0010] As a preferred technical solution of the present utility model, the material of the second shielding layer is a shielding composite material, and the material of the outer sheath layer is polyethylene.

[0011] As a preferred technical solution of the present invention, the material of the second protective layer is polyurethane.

[0012] Compared with the prior art, the utility model provides a low-voltage cold-resistant longitudinal water-blocking power cable, which has the following beneficial effects:

[0013] 1. This low-voltage cold-resistant longitudinal water-blocking power cable adopts cold-resistant insulating material cross-linked polyethylene to ensure that the cable can maintain good softness and elasticity in low temperature environment and is not easy to harden or brittle. The longitudinal water-blocking uses a water-blocking tape to effectively prevent moisture from penetrating along the longitudinal direction of the cable. Once it comes into contact with moisture, it can quickly absorb and swell, effectively preventing the spread of moisture inside the cable, ensuring that the internal insulation material of the cable is not damaged by moisture. Through the design of the water-blocking layer and the outer sheath layer, while ensuring the cold-resistant and waterproof properties, the electrical performance of the cable is stable, the connecting parts are compact and reliable, the safety hazards caused by poor connection are reduced, and the stability and reliability of the power transmission system are improved. Through the design of the outer sheath layer, it can resist the influence of environmental factors such as ultraviolet rays, oxidation, acid and alkali, extend the service life of the cable, and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the front view of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 3 This is a structural breakdown diagram of the utility model.

[0017] In the figure: 1. conductor; 2. first shielding layer; 3. first waterproof layer; 4. first insulating layer; 5. first protective layer; 6. filling layer; 7. water-blocking layer; 8. second waterproof layer; 9. second shielding layer; 10. outer sheath layer; 11. second protective layer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Embodiment 1

[0020] See also Figure 1-3 In this embodiment: a low-voltage cold-resistant longitudinal water-blocking power cable comprises a plurality of conductors 1, the outer wall of the conductor 1 is fixedly connected with a first shielding layer 2, the outer wall of the first shielding layer 2 is fixedly connected with a first waterproof layer 3, the outer wall of the first waterproof layer 3 is fixedly connected with a first insulating layer 4, the outer wall of the first insulating layer 4 is fixedly connected with a first protective layer 5, the outer wall of the first protective layer 5 is fixedly connected with a filling layer 6, the outer wall of the filling layer 6 is fixedly connected with a water-blocking layer 7, the outer wall of the water-blocking layer 7 is fixedly connected with a second waterproof layer 8, the outer wall of the second waterproof layer 8 is fixedly connected with a second shielding layer 9, the outer wall of the second shielding layer 9 is fixedly connected with an outer sheath layer 10, and the outer wall of the outer sheath layer 10 is fixedly connected with a second protective layer 11.

[0021] In this embodiment, the design of the first insulating layer 4 ensures that the cable can maintain good softness and elasticity in a low temperature environment and is not easy to harden or become brittle. The design of the water-blocking layer 7 effectively prevents moisture from penetrating along the longitudinal direction of the cable. Once it comes into contact with moisture, it can quickly absorb and swell, effectively preventing the spread of moisture inside the cable, and ensuring that the insulating material inside the cable is not damaged by moisture. The design of the water-blocking layer 7 and the outer sheath layer 10 ensures that the electrical performance of the cable is stable while ensuring the cold resistance and waterproof properties. The connecting parts are compact and reliable, reducing safety hazards caused by poor connections, and improving the stability and reliability of the power transmission system. The design of the outer sheath layer 10 resists the influence of environmental factors such as ultraviolet rays, oxidation, acid and alkali, prolongs the service life of the cable, and reduces maintenance costs.

[0022] Preferably, the conductor 1 is made of copper, and the first shielding layer 2 is made of metal foil.

[0023] Among them, copper has good conductivity and metal foil can provide very effective shielding.

[0024] Preferably, the material of the first waterproof layer 3 is EPDM rubber, and the material of the first insulating layer 4 is cross-linked polyethylene.

[0025] Among them, EPDM rubber has excellent water resistance, heat resistance and chemical resistance, which can further prevent the conductor 1 from contacting water and affecting its use. Cross-linked polyethylene can ensure that the cable can still maintain good softness and elasticity in a low temperature environment, and is not easy to harden or become brittle. Compared with traditional cables, it has higher cold resistance.

[0026] Furthermore, the material of the first protective layer 5 is silicone rubber, and the material of the filling layer 6 is polypropylene.

[0027] Among them, silicone rubber has high temperature resistance, good flexibility and aging resistance, and has excellent electrical insulation properties.

[0028] Furthermore, the material of the water-blocking layer 7 is a water-blocking tape, and the material of the second waterproof layer 8 is silica gel.

[0029] Among them, the longitudinal water-blocking tape is used to effectively prevent moisture from penetrating along the longitudinal direction of the cable. Once it comes into contact with moisture, it can quickly absorb and swell, effectively preventing the spread of moisture inside the cable and ensuring that the internal insulation material of the cable is not damaged by moisture. Silica gel can still maintain its waterproof and insulating properties under extreme temperatures and is suitable for low temperature areas.

[0030] Preferably, the material of the second shielding layer 9 is a shielding composite material, and the material of the outer sheath layer 10 is polyethylene.

[0031] Among them, the shielding composite material includes a composite material mixed with metal fibers and other non-metallic materials, which can provide good shielding effect and combine the advantages of other materials. Polyethylene has the ability to resist the influence of environmental factors such as ultraviolet rays, oxidation, acid and alkali, extend the service life of the cable and reduce maintenance costs.

[0032] Furthermore, the material of the second protective layer 11 is polyurethane.

[0033] Among them, the material has good elasticity, strong wear resistance, and good waterproof performance, and is suitable for use in dynamic or static water.

[0034] The working principle and use process of the utility model are as follows: the cable is connected and laid. After the laying is completed, the cable can be used. The design of the water-blocking layer 7 can effectively prevent moisture from penetrating along the longitudinal direction of the cable. Once it comes into contact with moisture, it can quickly absorb and swell, effectively preventing the spread of moisture inside the cable, ensuring that the insulating material inside the cable is not damaged by moisture. The design of the first insulating layer 4 ensures that the cable can still maintain good softness and elasticity in a low temperature environment and is not easy to harden or become brittle. The design of the water-blocking layer 7 and the outer sheath layer 10 ensures that the cable has the properties of cold resistance and waterproofness, while ensuring the stability of the electrical performance of the cable. The connecting components are compact and reliable, reducing safety hazards caused by poor connections, etc., and improving the stability and reliability of the power transmission system.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low-voltage cold-resistant longitudinal water-blocking power cable, comprising a plurality of conductors (1), characterized in that: The outer wall of the conductor (1) is fixedly connected to a first shielding layer (2), the outer wall of the first shielding layer (2) is fixedly connected to a first waterproof layer (3), the outer wall of the first waterproof layer (3) is fixedly connected to a first insulating layer (4), the outer wall of the first insulating layer (4) is fixedly connected to a first protective layer (5), the outer wall of the first protective layer (5) is fixedly connected to a filling layer (6), the outer wall of the filling layer (6) is fixedly connected to a water-blocking layer (7), the outer wall of the water-blocking layer (7) is fixedly connected to a second waterproof layer (8), the outer wall of the second waterproof layer (8) is fixedly connected to a second shielding layer (9), the outer wall of the second shielding layer (9) is fixedly connected to an outer sheath layer (10), and the outer wall of the outer sheath layer (10) is fixedly connected to a second protective layer (11).

2. A low-voltage cold-resistant longitudinal water-blocking power cable according to claim 1, characterized in that: The conductor (1) is made of copper and the first shielding layer (2) is made of metal foil.

3. A low-voltage cold-resistant longitudinal water-blocking power cable according to claim 1, characterized in that: The material of the first waterproof layer (3) is EPDM rubber, and the material of the first insulating layer (4) is cross-linked polyethylene.

4. A low-voltage cold-resistant longitudinal water-blocking power cable according to claim 1, characterized in that: The material of the first protective layer (5) is silicone rubber, and the material of the filling layer (6) is polypropylene.

5. The low-voltage cold-resistant longitudinal water-blocking power cable according to claim 1, characterized in that: The material of the water-blocking layer (7) is a water-blocking tape, and the material of the second waterproof layer (8) is silica gel.

6. A low-voltage cold-resistant longitudinal water-blocking power cable according to claim 1, characterized in that: The material of the second shielding layer (9) is a shielding composite material, and the material of the outer sheath layer (10) is polyethylene.

7. A low-voltage cold-resistant longitudinal water-blocking power cable according to claim 1, characterized in that: The material of the second protective layer (11) is polyurethane.

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