Moisture resistant cable

Abstract

The application provides a moisture-proof cable, which comprises a conductor, and the conductor is wrapped with an insulating layer, a waterproof adhesive layer, a moisture-proof pipe, a shielding layer, a water-absorbing layer and a protective layer from inside to outside; the moisture-proof pipe is an aluminum pipe and is coated with the waterproof adhesive layer; the water-absorbing layer is made of water-absorbing expansion material; and the outer surface of the protective layer is provided with a protection device for butt joint of the cable. The moisture-proof cable of the application is wrapped with the insulating layer, the waterproof adhesive layer, the moisture-proof pipe, the shielding layer, the water-absorbing layer and the protective layer from inside to outside; the moisture-proof pipe is an aluminum pipe and is coated with the waterproof adhesive layer to isolate external moisture; and the water-absorbing layer is made of water-absorbing expansion material and is extruded out of the protective layer when meeting water vapor; and when the outer surface of the protective layer is locally damaged, the protection device on the outer surface of the protective layer fastens the aluminum sheet by bolts and extrudes the annular ring made of silica gel material, so that the moisture is prevented from invading the cable along the axial direction of the cable and damaging the cable.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and more specifically to a moisture-proof cable. Background Technology

[0002] Cables are typically rope-like structures made of several or groups of conductors (at least two conductors per group) twisted together. Each group of conductors is insulated from the others and is often twisted around a central conductor, with the entire structure covered by a highly insulating outer layer. Cables are characterized by internal conductivity and external insulation. They are often installed in the air, underground, or underwater for telecommunications or power transmission. To prevent wear and tear, cables have an external protective layer. However, due to the limitations of the installation environment, moisture can corrode this protective layer, allowing moisture to enter the cable and severely impacting its lifespan.

[0003] To address the above problems, we propose a moisture-proof cable. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a moisture-proof cable, employing the following technical solution: It includes a conductor, which is wrapped from the inside out with an insulation layer, a waterproof adhesive layer, a moisture-proof conduit, a shielding layer, a water-absorbing layer, and a protective layer. The moisture-proof conduit is an aluminum conduit covered with a waterproof adhesive layer, the water-absorbing layer is made of a water-absorbing and expanding material, and the outer surface of the protective layer is provided with a protective device for cable connection.

[0005] Furthermore, the shielding layer is a waterproof crystalline layer formed by the condensation and crystallization of silicate cement and penetrating crystalline waterproof coating.

[0006] Furthermore, the formulation of the waterproof adhesive layer is asphalt 40-70%, rosin 8-20%, epoxy resin 0.3-1.2%, and tetrahydronaphthalene 17-52%.

[0007] Furthermore, the preparation method of the waterproof adhesive layer is as follows: place the prepared asphalt and rosin materials in a container, heat and stir for 1-2 hours until the temperature reaches 200-220℃ and the asphalt and rosin are completely melted, then add epoxy resin and stir evenly. When the temperature drops to 170-180℃, add tetrahydronaphthalene and stir evenly, then cool.

[0008] Furthermore, the inner surface of the protective layer is provided with a plurality of groove units along the axial direction, each groove unit including a plurality of grooves symmetrically arranged along the center of the conductor, and the grooves are filled with calcium oxide desiccant.

[0009] Furthermore, the protective device includes a sleeve and a clamping mechanism fixedly connected to both ends of the sleeve.

[0010] Furthermore, the clamping mechanism is fitted onto the annular ring on the outer surface of the protective layer. The annular ring is covered with an aluminum sheet, and a protective sleeve is fitted onto the aluminum sheet. The upper end of the protective sleeve is provided with an opening, and the aluminum sheet extends out of the opening and is fastened by bolts.

[0011] Furthermore, the annular ring is made of silicone.

[0012] Beneficial effects

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The moisture-proof cable of the present invention has an conductor wrapped from the inside out with an insulation layer, a waterproof adhesive layer, a moisture-proof pipe, a shielding layer, a water-absorbing layer, and a protective layer. The moisture-proof pipe is an aluminum pipe covered with a waterproof adhesive layer to isolate external moisture, and the water-absorbing layer is made of a water-absorbing and swelling material that expands upon contact with moisture and squeezes it out of the protective layer. At the same time, when the outer surface of the protective layer is partially damaged, in order to prevent external moisture from entering, a protective device on the outer surface of the protective layer is used to fasten the aluminum sheet with bolts and compress the silicone ring, thereby preventing moisture from entering along the cable axis and damaging the cable. Attached Figure Description

[0015] The present invention will now be described in detail with reference to the accompanying drawings.

[0016] Figure 1 This is a cross-sectional view of a moisture-proof cable according to an embodiment of the present invention;

[0017] Figure 2 This is a side view of a moisture-proof cable according to an embodiment of the present invention.

[0018] Figure label:

[0019] Conductor-1, Insulation layer-2, Waterproof adhesive layer-3, Moisture-proof pipe-4, Shielding layer-5, Water-absorbing layer-6, Protective layer-7, Groove-8, Desiccant-9, Sleeve-10, Ring-11, Protective sleeve-12, Aluminum sheet-13, Bolt-14. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] Reference Figures 1-2This invention provides a moisture-proof cable, comprising a conductor 1, which is wrapped from the inside out with an insulation layer 2, a waterproof adhesive layer 3, a moisture-proof pipe 4, a shielding layer 5, a water-absorbing layer 6, and a protective layer 7. The moisture-proof pipe 4 is an aluminum pipe covered with a waterproof adhesive layer 3. When moisture enters, the aluminum moisture-proof pipe 4 is easily oxidized to form a dense oxide film, and its outer surface is covered with a waterproof adhesive layer 3, which further prevents moisture intrusion. The water-absorbing layer 6 is made of a water-absorbing and swelling material, which expands when exposed to moisture and can squeeze out the protective layer 7. The outer surface of the protective layer 7 is provided with a protective device for cable splicing.

[0022] Furthermore, the shielding layer 5 is formed by the condensation and crystallization of silicate cement and penetrating crystalline waterproof coating to create a waterproof crystalline layer. The silicate cement acts as a catalyst, causing the penetrating crystalline waterproof coating to undergo condensation and crystallization in a moist environment on the surface of the silicate cement, thus forming a waterproof crystal.

[0023] Furthermore, the formulation of the waterproof adhesive layer 3 in this embodiment is asphalt 65%, rosin 15%, epoxy resin 0.5%, and tetrahydronaphthalene 35%. First, the prepared asphalt and rosin materials are placed in a container and heated and stirred for 1 hour until the temperature reaches 200-220°C and the asphalt and rosin are completely melted. Then, epoxy resin is added and stirred evenly. When the temperature drops to 170-180°C, tetrahydronaphthalene is added and stirred evenly. After cooling, the waterproof adhesive prepared by this method is a cold water adhesive, which has good waterproof performance and can be used for waterproofing and seepage prevention of underground water pipes and containers. At the same time, the waterproof adhesive layer can be used to bond the insulation layer 3 and the moisture-proof pipe 4.

[0024] Furthermore, the inner surface of the protective layer 7 is provided with a plurality of groove units 8 along the axial direction. Each groove unit 8 includes several grooves 8 symmetrically arranged along the center of the conductor 1. The grooves 8 are filled with calcium oxide desiccant 9. The calcium oxide desiccant 9 can quickly absorb water vapor. When the protective layer 7 is damaged, the calcium oxide desiccant 9 can absorb water vapor as the first layer of protection and slow down the further intrusion of water vapor.

[0025] Furthermore, when the cable experiences partial damage to the protective layer 7, a protective device can be applied. This protective device includes a sleeve 10 and a clamping mechanism fixedly connected to both ends of the sleeve 10. The clamping mechanism is fitted onto a silicone ring 11 on the outer surface of the protective layer 7. An aluminum sheet 13 is covered on the ring 11, and a protective sleeve 12 is fitted onto the aluminum sheet 13. The upper end of the protective sleeve 12 has an opening, and the aluminum sheet 13 extends out of the opening and is secured by bolts 14. The sleeve 10 is fitted onto the damaged area, and then the clamping devices at both ends, i.e., the bolts 14, are used to tighten both ends of the aluminum sheet 13, thereby squeezing the silicone ring 11. The ring 11 can tightly press against the outer surface of the protective layer 7 to prevent moisture from entering the cable axially. At the same time, the opening on the protective sleeve 12 is filled by the aluminum sheet 13, and the aluminum sheet 13 will oxidize when it comes into contact with water to form a dense protective film, which can also prevent moisture from entering through the opening.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A moisture-proof cable, characterized in that: The device includes a conductor, which is wrapped from the inside out with an insulation layer, a waterproof adhesive layer, a moisture-proof pipe, a shielding layer, a water-absorbing layer, and a protective layer. The moisture-proof pipe is an aluminum pipe covered with a waterproof adhesive layer. The water-absorbing layer is made of a water-absorbing and swelling material. The outer surface of the protective layer is provided with a protective device for cable splicing. The protective device includes a sleeve and a clamping mechanism fixedly connected to both ends of the sleeve. The clamping mechanism is sleeved on an annular ring on the outer surface of the protective layer. The annular ring is covered with an aluminum sheet. A protective sleeve is sleeved on the aluminum sheet. An opening is provided at the upper end of the protective sleeve. The aluminum sheet extends out of the opening and is fastened by bolts.

2. The moisture-proof cable according to claim 1, characterized in that: The shielding layer is a waterproof crystalline layer formed by the condensation and crystallization of silicate cement and penetrating crystalline waterproof coating.

3. The moisture-proof cable according to claim 1, characterized in that: The waterproof adhesive layer is formulated with 40-70% asphalt, 8-20% rosin, 0.3-1.2% epoxy resin, and 17-52% tetrahydronaphthalene.

4. A moisture-proof cable according to claim 1, characterized in that: The method for preparing the waterproof adhesive layer is as follows: place the prepared asphalt and rosin materials in a container, heat and stir for 1-2 hours until the temperature reaches 200-220℃ and the asphalt and rosin are completely melted, then add epoxy resin and stir evenly. When the temperature drops to 170-180℃, add tetrahydronaphthalene and stir evenly, then cool.

5. A moisture-proof cable according to claim 1, characterized in that: The inner surface of the protective layer is provided with a plurality of groove units along the axial direction. Each groove unit includes several grooves symmetrically arranged along the center of the conductor. The grooves are filled with calcium oxide desiccant.

6. A moisture-proof cable according to claim 1, characterized in that: The ring is made of silicone.

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