Longitudinal watertight rubber sheath power cable resistant to water pressure of 12 MPa

Abstract

The utility model discloses a water-pressure-resistant 12MPa longitudinal watertight rubber sheath power cable, which comprises a cable core, and a protective layer, a wrapping tape and a sheath which are sequentially arranged outside the cable core from inside to outside, and a watertight layer is arranged between the cable core and the protective layer; the protective layer comprises a through hole support layer and a grid support layer arranged outside the through hole support layer, through cooperative use of the through hole support layer and the grid support layer, the compressive resistance of the sheath to water is increased, the damage probability of the sheath when the cable is used underwater is reduced, and when the sheath is damaged under the action of external force, the watertight layer in the cable swells when meeting water, and the cable is not damaged. And gaps in the cable are filled, so that external water is further prevented from intruding into the cable, the supporting force of the through hole bracket layer and the grid bracket layer on the sheath is increased, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, and particularly relates to a 12MPa water pressure resistant longitudinal water-tight rubber sheath power cable. Background Art

[0002] In order to enable the cable to be used underwater or in a humid environment, the cable needs to be able to withstand a certain water pressure so as not to be affected by the water pressure. The longitudinal water-tight cable can prevent water from penetrating into the cable along the length direction of the cable and affecting the use of the cable. There are two methods for water blocking after the sheath of the longitudinal water-tight cable is damaged. One is to apply a full layer of water-blocking glue to delay the flow of water, and the other is a foamed water-blocking tape, whose material characteristic is to expand when encountering water and fill the gaps of the cable, so as to achieve a sealing effect.

[0003] Currently, as the requirements for water pressure resistance and sealing effect of the cable use environment are getting higher and higher, when the cable withstands a water pressure of 6 Mpa or even 12 Mpa, it will cause the external deformation of the cable. After a long time, the cable sheath will be damaged, and the damaged part will be more unable to withstand the water pressure. Even though the water-tight material can keep the inside of the cable in a sealed state, the damaged part will cause other parts of the cable to be damaged, which will affect the service life of the cable to a certain extent.

[0004] To solve the above-mentioned deficiencies of the existing technology, it is necessary to design a 12MPa water pressure resistant longitudinal water-tight rubber sheath power cable. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art, and to propose a 12MPa water pressure resistant longitudinal water-tight rubber sheath power cable.

[0006] A 12MPa water pressure resistant longitudinal water-tight rubber sheath power cable includes a cable core, and a protective layer, a tape, and a sheath that are sequentially arranged outside the cable core from the inside to the outside. A water-tight layer is arranged between the cable core and the protective layer; the protective layer includes a through-hole support layer and a grid support layer arranged outside the through-hole support layer. A number of main through-holes are arranged on the through-hole support layer, and a number of auxiliary through-holes penetrating adjacent main through-holes are opened on the inner wall of the main through-holes.

[0007] Furthermore, the grid support layer is in a rectangular grid shape, and the main through-holes correspond to the cells of the grid support layer.

[0008] Furthermore, both the through-hole support layer and the grid support layer are made of ethylene propylene rubber.

[0009] Furthermore, the water-tight layer is made of a water-blocking tape.

[0010] Furthermore, the cable core includes a copper stranded conductor and an insulating layer arranged on the outer surface of the copper stranded conductor.

[0011] Furthermore, the sheath is made of chlorosulfonated polyethylene. Advantages

[0012] By using the through-hole support layer and the grid support layer in combination, the present utility model increases the water pressure resistance of the sheath and reduces the probability of damage to the sheath when the cable is used underwater. When the sheath is damaged under external force and water flows into the cable through the damaged part of the sheath, the watertight layer inside the cable swells when it comes into contact with water, filling the gaps inside the cable, as well as the main through-holes and the auxiliary through-holes, and connecting several main through-holes through the auxiliary through-holes, further preventing external water from invading the cable interior, and increasing the stability of the through-hole support layer and the supporting force of the through-hole support layer and the grid support layer on the sheath, so that the damaged part of the sheath will not be aggravated by water pressure damage, and the service life of the cable is increased.

[0013] By corresponding the main through-holes with the cells of the grid support layer, when the watertight layer inside the cable swells when it comes into contact with water, the watertight layer can fill the cells of the grid support layer through the main through-holes, increasing the supporting force of the grid support layer and the through-hole support layer on the sheath while preventing external water from entering the cable interior. Description of the Drawings

[0014] Figure 1 Schematic three-dimensional structure diagram of the longitudinal watertight rubber sheath power cable with a water pressure resistance of 12 MPa according to the present utility model;

[0015] Figure 2 Schematic structure diagram of the protective layer of the present utility model;

[0016] Figure 3 Schematic diagram of the partial enlarged structure of the protective layer of the present utility model;

[0017] Figure 4 Schematic connection diagram between the layers of the present utility model;

[0018] Figure 5 Schematic diagram of the through-hole support layer of the present utility model.

[0019] In the figure:

[0020] Cable core 1; copper stranded conductor 11; insulating layer 12; watertight layer 2; protective layer 3; through-hole support layer 31; grid support layer 32; main through-hole 33; auxiliary through-hole 34; tape 4; sheath 5. Detailed Embodiment

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-5 , this embodiment proposes a longitudinal watertight rubber sheath power cable with a water pressure resistance of 12 MPa, which includes a cable core 1, and a protective layer 3, a tape 4, and a sheath 5 that are sequentially arranged outside the cable core 1 from the inside to the outside. The sheath 5 is made of chlorosulfonated polyethylene. The cable core 1 includes a copper stranded conductor 11 and an insulating layer 12 arranged on the outer surface of the copper stranded conductor 11. The insulating layer 12 is made of ethylene propylene rubber. Water blocking materials are provided on both the copper stranded conductor 11 and the insulating layer 12, which can prevent water from entering during use in a humid or underwater environment, affecting the use of the cable and causing potential safety hazards. A watertight layer 2 is arranged between the cable core 1 and the protective layer 3. The watertight layer 2 is made of a water blocking tape. The foam water blocking tape used for the watertight layer 2 has the material property of swelling when encountering water, filling the gaps in the cable, so as to achieve a sealing effect.

[0023] The protective layer 3 includes a through-hole support layer 31 and a grid support layer 32 disposed outside the through-hole support layer 31. Both the through-hole support layer 31 and the grid support layer 32 are made of ethylene-propylene rubber. When the cable is used in a humid or underwater environment, in order to prevent water from entering the cable interior due to the damage of the sheath 5, the through-hole support layer 31 and the grid support layer 32 are provided. The through-hole support layer 31 and the grid support layer 32 are used in cooperation, which increases the water resistance of the sheath 5, enhances the internal support force of the cable, reduces the probability of damage to the sheath 5 when the cable is used underwater, and to a certain extent increases the service life of the cable. A number of main through-holes 33 are provided on the through-hole support layer 31. The grid support layer 32 is in a rectangular grid shape, and the main through-holes 33 correspond to the cells of the grid support layer 32. When the sheath 5 is damaged under external force and water flows into the cable interior through the damaged part of the sheath 5, the water-tight layer 2 inside the cable swells upon contact with water and fills the gaps inside the cable. At this time, the main through-holes 33 are also filled with the water-tight material of the water-tight layer 2, further preventing external water from invading the cable interior. Since the water-tight material of the water-tight layer 2 fills the main through-holes 33, the cells of the grid support layer 32 are also filled, further increasing the support force of the through-hole support layer 31 and the grid support layer 32 for the sheath 5, preventing the damaged part of the sheath 5 from being further damaged due to water pressure, and increasing the service life of the cable. A number of auxiliary through-holes 34 penetrating adjacent main through-holes 33 are provided on the inner wall of the main through-holes 33. By providing the auxiliary through-holes 34, when the sheath 5 is damaged and the water-tight layer 2 swells upon contact with water, in order to further enhance the sealing effect inside the cable, the water-tight material used for the water-tight layer 2 will connect a number of main through-holes 33 through the auxiliary through-holes 34, increasing the stability of the through-hole support layer 31, further enhancing the water resistance of the through-hole support layer 31, and also increasing the sealing effect of the through-hole support layer 31 to a certain extent, delaying the degree of cable damage and improving the service life of the cable.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A longitudinal watertight rubber sheath power cable with a water pressure resistance of 12 MPa, characterized in that: It includes a cable core (1), a protective layer (3), a tape (4), and a sheath (5) that are sequentially arranged outside the cable core (1) from the inside to the outside. A watertight layer (2) is provided between the cable core (1) and the protective layer (3). The protective layer (3) includes a through-hole support layer (31) and a grid support layer (32) arranged outside the through-hole support layer (31). A number of main through-holes (33) are provided on the through-hole support layer (31), and a number of auxiliary through-holes (34) penetrating adjacent main through-holes (33) are formed on the inner wall of the main through-holes (33).

2. The power cable according to claim 1, wherein: The grid support layer (32) is in a rectangular grid shape, and the main through-holes (33) correspond to the cells of the grid support layer (32).

3. The power cable according to claim 1, characterized in that: Both the through-hole support layer (31) and the grid support layer (32) are made of ethylene propylene rubber.

4. The power cable according to claim 1, characterized in that: The watertight layer (2) is made of a water-blocking tape.

5. The power cable according to claim 1, characterized in that: The cable core (1) includes a copper stranded conductor (11) and an insulating layer (12) arranged on the outer surface of the copper stranded conductor (11).

6. The power cable according to claim 1, characterized in that: The sheath (5) is made of chlorosulfonated polyethylene.

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