Water-blocking moisture-proof power cable

Abstract

The utility model relates to the technical field of cables, in particular to a water-blocking and moisture-proof power cable, which comprises a wear-resistant layer, a supporting layer arranged in the wear-resistant layer, a water-absorbing expansion layer arranged in the supporting layer, a water-blocking layer arranged in the water-absorbing expansion layer, a flame-retardant layer arranged in the water-blocking layer, and a moisture-proof layer arranged in the flame-retardant layer. A damp-proof layer is arranged in the flame-retardant layer, a filling layer is arranged in the damp-proof layer, and a plurality of insulating layers are arranged in the filling layer. Compared with the prior art, the cable has the advantages that the surface of the cable is prevented from cracking due to abrasion through the wear-resistant layer, the cable is supported by the supporting layer, the surface of the cable is prevented from cracking due to bending, and the water swelling layer, the waterproof layer, the moisture-proof layer and the filling layer are arranged in a matched manner, so that the service life of the cable is prolonged. Multiple waterproof and moisture-proof operations are performed on the cable core, so that the influence of moisture and moisture on the cable core is greatly avoided, and the service life of the cable core is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a water-blocking and moisture-proof power cable. Background Art

[0002] Power cables are used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas. They are generally composed of a core, an insulation layer, a shielding layer, and a protective layer. The protection of the protective layer should be adjusted according to the use environment of the cable. Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single-strand or multi-strand wires and an insulation layer, and are used to connect circuits, electrical appliances, etc.

[0003] When the soil in underground cables is soft, soil subsidence may occur. As the soil sinks, the cable may be easily bent or even the protective layer may crack. When the protective layer cracks, moisture and water in the soil may enter the cable. The moisture and water may have a certain impact on the cable core. In severe cases, the cable core may even be damaged, which affects the service life of the cable. Therefore, a water-blocking and moisture-proof power cable is needed to solve the above problems. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0005] Therefore, one purpose of the utility model is to provide a water-blocking and moisture-proof power cable to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0006] In order to achieve the above-mentioned objectives, an embodiment of the utility model on one hand provides a water-blocking and moisture-proof power cable, comprising a wear-resistant layer, a supporting layer is arranged inside the wear-resistant layer, a water-absorbing and expanding layer is arranged inside the supporting layer, a water-blocking layer is arranged inside the water-absorbing and expanding layer, a flame-retardant layer is arranged inside the water-blocking layer, a moisture-proof layer is arranged inside the flame-retardant layer, a filling layer is arranged inside the moisture-proof layer, a plurality of insulating layers are arranged inside the filling layer, and a cable core is arranged inside each of the plurality of insulating layers.

[0007] Preferably, any of the above schemes is that the material of the wear-resistant layer is nitrile rubber, which has the advantages of excellent oil resistance, high wear resistance, good heat resistance, etc., which greatly avoids external damage to the cable.

[0008] Preferably, any of the above schemes is that the material of the support layer is polyurethane rubber, which has the advantages of high hardness, good strength, high elasticity, high wear resistance, tear resistance, etc., thereby greatly avoiding cracking of the support layer.

[0009] Preferably, the water-swelling layer is made of a highly absorbent resin, which can quickly absorb hundreds of times more water than its own weight to form a gel, thereby sealing and blocking the cracked part into which water has entered, thereby preventing water from continuing to penetrate downward.

[0010] Preferably, the material of the water-blocking layer is PVDC. The chlorine atoms in the PVDC molecules are hydrophobic and will not form hydrogen bonds. It is difficult for oxygen molecules and water molecules to move in the PVDC molecules, so that it has excellent oxygen barrier and moisture barrier properties. The oxygen barrier property is not affected by the humidity of the surrounding environment, so that the water barrier property of the water-blocking layer is relatively good.

[0011] Preferably, any of the above schemes is that the material of the flame retardant layer is fluororubber, which has good heat resistance and oxidation resistance, so that the flame retardant layer has better flame retardancy.

[0012] Preferably, in any of the above schemes, the moisture-proof layer is made of polyethylene, which has low water absorption and can prevent water from continuing to move into the interior of the cable.

[0013] Preferably, any of the above schemes is that the material of the filling layer is hydrogel, and the hydrogel can operate as a water absorbing layer, thereby greatly avoiding the situation where water moves toward the cable core.

[0014] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0015] The wear-resistant layer is provided to avoid cracking of the cable surface due to wear, the supporting layer supports the cable to avoid cracking of the cable surface due to bending, and the cable core is subjected to multiple waterproof and moisture-proof operations through the coordinated setting of the water-absorbing expansion layer, the water-blocking layer, the moisture-proof layer and the filling layer, thereby greatly avoiding the influence of water and moisture on the cable core and ensuring the service life of the cable core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] In the figure: 1-wear-resistant layer, 2-support layer, 3-water-absorbing and expanding layer, 4-water-blocking layer, 5-flame-retardant layer, 6-moisture-proof layer, 7-filling layer, 8-insulating layer, 9-cable core. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0019] like Figure 1 As shown, a water-blocking and moisture-proof power cable comprises a wear-resistant layer 1, through which the outer surface of the cable has good wear resistance, and the cable is prevented from being damaged due to external wear. A support layer 2 is arranged inside the wear-resistant layer 1, and the overall stability of the cable is enhanced by the support layer 2. A water-absorbing and swelling layer 3 is arranged inside the support layer 2, and a water-blocking layer 4 is arranged inside the water-absorbing and swelling layer 3. A flame-retardant layer 5 is arranged inside the water-blocking layer 4, and the flame-retardant layer 5 makes the cable have good flame-retardant and fire-proof performance. A moisture-proof layer 6 is arranged inside the flame-retardant layer 5, and a filling layer 7 is arranged inside the moisture-proof layer 6, and a plurality of insulating layers are arranged inside the filling layer 7. 8. A cable core 9 is arranged inside each of the several insulating layers 8. When cracks appear in a part of the wear-resistant layer 1 and the supporting layer 2 and moisture and water enter, the water-absorbing and expanding layer 3 will absorb the moisture and water and expand, thereby shielding and sealing the cracked parts of the wear-resistant layer 1 and the supporting layer 2 to prevent water from continuing to penetrate downward from the cracked parts of the wear-resistant layer 1 and the supporting layer 2. The water-blocking layer 4 can block the moisture and water on the water-absorbing and expanding layer 3 to prevent moisture and water from continuing to penetrate into the cable. The moisture-proof layer 6 and the filling layer 7 can shield the moisture and water again to prevent moisture and water from affecting the cable core 9.

[0020] As an optional technical solution of the present invention, the wear-resistant layer 1 is made of nitrile rubber, which has the advantages of excellent oil resistance, high wear resistance, good heat resistance, etc., which greatly avoids external damage to the cable.

[0021] As an optional technical solution of the present invention, the material of the support layer 2 is polyurethane rubber, which has the advantages of high hardness, good strength, high elasticity, high wear resistance, and tear resistance, thereby greatly avoiding cracking of the support layer 2.

[0022] As an optional technical solution of the present invention, the material of the water-absorbing and expanding layer 3 is a super absorbent resin, which can quickly absorb water hundreds of times larger than its own weight to form a gel, thereby being able to seal and block the cracked part that has let in water, thereby preventing the water from continuing to penetrate downward.

[0023] As an optional technical solution of the present invention, the material of the water-blocking layer 4 is PVDC. The chlorine atoms in the PVDC molecules are hydrophobic and will not form hydrogen bonds. It is difficult for oxygen molecules and water molecules to move in the PVDC molecules, so that it has excellent oxygen barrier and moisture barrier properties. Moreover, its oxygen barrier property is not affected by the humidity of the surrounding environment, so that the water barrier property of the water-blocking layer 4 is relatively good.

[0024] As an optional technical solution of the present invention, the material of the flame retardant layer 5 is fluororubber, which has good heat resistance and oxidation resistance, so that the flame retardant layer 5 has better flame retardancy.

[0025] As an optional technical solution of the present invention, the moisture-proof layer 6 is made of polyethylene, which has low water absorption and can prevent water from continuing to move into the interior of the cable.

[0026] As an optional technical solution of the present invention, the filling layer 7 is made of hydrogel, which can operate as a water absorbing layer, thereby greatly preventing water from moving toward the cable core 9 .

[0027] A water-blocking and moisture-proof power cable, the working principle is as follows:

[0028] When cracks appear in a part of the wear-resistant layer 1 and the supporting layer 2 and cause water and moisture to enter, the water-absorbing and expanding layer 3 will absorb the water and moisture and expand, thereby shielding and sealing the cracked parts of the wear-resistant layer 1 and the supporting layer 2, preventing water from continuing to penetrate downward from the cracked parts of the wear-resistant layer 1 and the supporting layer 2, and the water-blocking layer 4 can block the water and moisture on the water-absorbing and expanding layer 3, preventing the water and moisture from continuing to penetrate into the interior of the cable, and the moisture-proof layer 6 and the filling layer 7 are used to shield the water and moisture again, avoiding the influence of water and moisture on the cable core 9.

[0029] To sum up, the water-blocking and moisture-proof power cable avoids cracking of the cable surface due to wear by setting the wear-resistant layer 1, supports the cable by the supporting layer 2 to avoid cracking of the cable surface due to bending, and performs multiple waterproof and moisture-proof operations on the cable core 9 through the coordinated setting of the water-absorbing expansion layer 3, the water-blocking layer 4, the moisture-proof layer 6 and the filling layer 7, thereby greatly avoiding the influence of water and moisture on the cable core 9 and ensuring the service life of the cable core 9.

Claims

1. A water-blocking and moisture-proof power cable, characterized in that: The invention comprises a wear-resistant layer (1), a support layer (2) is arranged inside the wear-resistant layer (1), a water-absorbing and expanding layer (3) is arranged inside the support layer (2), a water-blocking layer (4) is arranged inside the water-blocking layer (3), a flame-retardant layer (5) is arranged inside the water-blocking layer (4), a moisture-proof layer (6) is arranged inside the flame-retardant layer (5), a filling layer (7) is arranged inside the moisture-proof layer (6), a plurality of insulating layers (8) are arranged inside the filling layer (7), and a cable core (9) is arranged inside each of the plurality of insulating layers (8).

2. The water-blocking and moisture-proof power cable according to claim 1, characterized in that: The material of the wear-resistant layer (1) is nitrile rubber.

3. The water-blocking and moisture-proof power cable according to claim 2, characterized in that: The material of the supporting layer (2) is polyurethane rubber.

4. The water-blocking and moisture-proof power cable according to claim 3, characterized in that: The material of the water-absorbing and expanding layer (3) is a highly water-absorbent resin.

5. The water-blocking and moisture-proof power cable according to claim 4, characterized in that: The material of the water-blocking layer (4) is PVDC.

6. The water-blocking and moisture-proof power cable according to claim 5, characterized in that: The material of the flame retardant layer (5) is fluororubber.

7. The water-blocking and moisture-proof power cable according to claim 6, characterized in that: The material of the moisture-proof layer (6) is polyethylene.

8. The water-blocking and moisture-proof power cable according to claim 7, characterized in that: The material of the filling layer (7) is hydrogel.

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