A kind of anti-breakdown high voltage cable

Abstract

The present invention discloses an anti-breakdown high-voltage cable, which belongs to the field of cable technology, and comprises a high-voltage cable body and a tensile reminder layer arranged outside the high-voltage cable body, wherein the high-voltage cable body comprises a plurality of internal conductor layers, a middle filling layer and an external elastic isolation layer, and the tensile reminder layer is located on the outer surface of the elastic isolation layer. The present invention is designed for high-voltage cables, and a beveled sleeve composed of a plurality of independent beveled rings is arranged on its surface. The supporting surface layer formed by the beveled sleeve can reduce the contact area with the contact surface, thereby preventing the rubber from being soaked in water, and the cone formed by the beveled sleeve can also achieve the effect of ventilation and drying, and can quickly remove the accumulated water on the surface to ensure that the cable is in a dry state, so as to avoid the situation where the cable is broken down by high voltage due to moisture, and an inclined reflective strip is arranged on the beveled sleeve on the outer surface layer, so as to remind construction personnel that the cable is deformed.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to an anti-breakdown high-voltage cable. Background Art

[0002] With the continuous development and expansion of power systems, cables, as an important power transmission tool, play a key role. However, the frequent occurrence of cable insulation breakdown seriously threatens the safe and stable operation of power systems.

[0003] In addition to the defects produced in the production process, high-voltage cables are often prone to cable breakdown due to the construction process and the later use environment. During the construction process, when the high-voltage cable is pulled, pulled or bent at a large angle, the insulating material in the high-voltage cable is squeezed and thinned and weakened, making it more likely for the cable to be broken down. In this case, the construction personnel cannot promptly determine whether there is a problem with the cable status. Furthermore, in a humid environment, the high-voltage cable is susceptible to moisture, and the insulation layer is prone to oxidation after long-term use. Based on this, an anti-breakdown high-voltage cable is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the high-voltage cable in the prior art is pulled, pulled or bent at a large angle, and squeezed, causing the insulating material in the high-voltage cable to become thinner and weaker, making it more likely for the cable to be punctured. In this case, the construction personnel are unable to promptly determine that there is a problem with the cable status. An anti-puncture high-voltage cable is proposed. By adding inert gas into a protective cavity composed of a bevel ring and an outer rubber connecting layer, oxidation of the high-voltage cable can be avoided through the protection of the inert gas, and the occurrence of high-voltage breakdown caused by oxidation of the rubber insulating layer under long-term use can be avoided. The inert gas generates a buffer, which can prevent falling objects from damaging the inside of the cable during construction, thereby protecting the cable and preventing the occurrence of high-voltage breakdown due to cable damage.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A breakdown-proof high-voltage cable comprises a high-voltage cable body and a tensile reminder layer arranged outside the high-voltage cable body, wherein the high-voltage cable body comprises a plurality of conductor layers inside, a filling layer in the middle and an elastic isolation layer outside, and the tensile reminder layer is located on the outer surface of the elastic isolation layer;

[0007] The conductor layer is composed of a metal wire core conductor, an inner semi-conductive layer and an inner insulating layer, and the isolation layer is composed of an inner protective rubber layer, a braided mesh rubber filler and an outer rubber connecting layer;

[0008] The conductor layers are evenly distributed inside the inner protective rubber layer, and the filling layer is filled with fillers inside the inner protective rubber layer to limit the movement between the conductor layers;

[0009] The tensile prompting layer comprises a bevel sleeve arranged on the surface of the outer rubber connecting layer, and the bevel sleeve is composed of a plurality of bevel sleeve rings connected with the outer surface of the outer rubber connecting layer.

[0010] Preferably, the woven mesh rubber filler comprises a honeycomb isolation mesh layer, the honeycomb isolation mesh layer is located between the inner protective rubber layer and the outer rubber connecting layer, and the interior is filled with a flame retardant rubber layer formed of flame retardant rubber.

[0011] Preferably, a protective cavity is formed between the beveled collar and the outer rubber connecting layer, and an inert gas is injected into the protective cavity to prevent oxidation of the high-voltage cable body by oxygen.

[0012] Preferably, the outer surface of the bevel collar is provided with an inclined reflective strip for reminding the tensile strength.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This scheme is designed for high-voltage cables, and a beveled sleeve composed of multiple independent beveled rings is arranged on its surface. The supporting surface formed by the beveled sleeve can reduce the contact area with the contact surface, thereby preventing the rubber from being soaked in water. The cone formed by the beveled sleeve can also achieve the effect of ventilation and drying, and can quickly remove the accumulated water on the surface to ensure that the cable is in a dry state, so as to avoid the cable being broken down by high voltage due to moisture.

[0015] 2. This solution adds inert gas into the protective cavity formed by the bevel ring and the outer rubber connecting layer. The protection of the inert gas can avoid oxidation of the high-voltage cable and avoid high-voltage breakdown caused by oxidation of the rubber insulation layer under long-term use. The inert gas creates a buffer to prevent damage to the inside of the cable caused by falling objects during construction, thereby protecting the cable and avoiding high-voltage breakdown caused by cable damage.

[0016] 3. This solution can effectively strengthen the insulating rubber layer at the pulled part when the cable is deformed by setting a honeycomb isolation mesh layer in the rubber layer. While ensuring the strength, it can also reinforce the weak parts caused by rubber deformation through the thickness of the honeycomb isolation mesh layer strengthened after being squeezed.

[0017] 4. This scheme provides an inclined reflective strip on the inclined sleeve of the outer layer. The inclined reflective strip caused by cable traction deformation has a different reflective angle from the normal inclined reflective strip, which can remind construction personnel that the cable here is pulled and deformed, avoiding the occurrence of high-voltage cable breakdown caused by the thinning and weakening of the cable protective layer due to the tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of an anti-breakdown high-voltage cable proposed by the present invention;

[0019] Figure 2 A schematic diagram of a three-dimensional cross-sectional structure of an anti-breakdown high-voltage cable proposed by the present invention;

[0020] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 4 This is a schematic structural diagram of a bevel bushing in an anti-breakdown high-voltage cable proposed by the present invention;

[0022] Figure 5 The present invention is a schematic structural diagram of a beveled collar in an anti-breakdown high-voltage cable.

[0023] In the figure: 1. Metal core conductor; 2. Inner semi-conductive layer; 3. Inner insulating layer; 4. Inner protective rubber layer; 5. Outer rubber connecting layer; 6. Filling layer; 7. Bevel ring; 8. Honeycomb isolation mesh layer; 9. Flame retardant rubber layer; 10. Protective cavity; 11. Inclined reflective strip. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] Example, see Figures 1 to 5, an anti-breakdown high-voltage cable, comprising a high-voltage cable body and a tensile reminder layer arranged outside the high-voltage cable body;

[0027] The tensile prompting layer includes a bevel sleeve arranged on the surface of the outer rubber connecting layer 5, and the bevel sleeve is composed of a plurality of bevel sleeve rings 7 connected to the outer surface of the outer rubber connecting layer 5;

[0028] It is worth noting that compared with traditional cables, the beveled sleeve formed by the beveled ring 7 can reduce the contact area with the contact surface when there is water on the contact surface, thereby preventing the rubber from being immersed in water, and the cone formed by the beveled sleeve can also achieve the effect of ventilation and drying, and can quickly remove the accumulated water on the surface to ensure that the cable is in a dry state, so as to avoid the cable being punctured by high voltage due to moisture.

[0029] Furthermore, a protective cavity 10 is formed between the bevel collar 7 and the outer rubber connecting layer 5, and an inert gas is injected into the protective cavity 10 to prevent oxygen from oxidizing the high-voltage cable body.

[0030] Each of the beveled collars 7 constituting the beveled sleeve forms a sealed space with the outer rubber connecting layer 5, thereby ensuring that when the beveled collar 7 at one location of the high-voltage cable is damaged, it will not affect the storage of the inert gas in the protective cavity 10 at other locations;

[0031] A further benefit of adopting the above method is that the inert gas in the protective cavity 10 can prevent oxidation of the high-voltage cable and avoid the occurrence of high-voltage breakdown caused by oxidation of the rubber insulation layer during long-term use.

[0032] Furthermore, the outer surface of the bevel collar 7 is provided with an inclined reflective strip 11 for reminding the tensile strength;

[0033] The inclined reflective strip 11 is uniformly attached to the surface of the inclined surface ring 7. When a high-voltage cable is pulled or pulled at a certain location, the outermost inclined surface ring 7 is deformed. When deformed, the angle of the inclined reflective strip 11 is deflected, which is obviously in sharp contrast with the inclined reflective strips 11 on the inclined surface rings 7 on both sides that are not subject to tension. Therefore, the user can be reminded that the high-voltage cable here is pulled, thereby avoiding the occurrence of high-voltage breakdown of the cable due to the thinning and weakening of the cable protective layer caused by the tension.

[0034] The high-voltage cable body consists of multiple conductor layers inside, a filling layer 6 in the middle and an elastic isolation layer outside, and the tensile prompt layer is located on the outer surface of the elastic isolation layer;

[0035] The conductor layer is composed of a metal core conductor 1, an inner semi-conductive layer 2 and an inner insulating layer 3, and the isolation layer is composed of an inner protective rubber layer 4, a braided mesh rubber filler and an outer rubber connecting layer 5;

[0036] The conductor layers are evenly distributed inside the inner rubber layer 4, and the filling layer 6 is filled with fillers inside the inner rubber layer 4 to limit the movement between the conductor layers;

[0037] The filling layer 6 is made of an insulating flame-retardant material, and is arranged to prevent the conductor layer arranged inside from moving, thereby ensuring that the distance between the adjacent multiple conductor layers remains unchanged.

[0038] Furthermore, the woven mesh rubber filling body includes a honeycomb isolation mesh layer 8, which is a kind of metal woven mesh. The honeycomb isolation mesh layer 8 is located between the inner protective rubber layer 4 and the outer rubber connecting layer 5, and is filled with a flame retardant rubber layer 9 formed by flame retardant rubber.

[0039] It is worth noting that when the high-voltage cable body is pulled, the honeycomb isolation mesh layer 8, which was originally in the expanded state, will be squeezed from the honeycomb surface to a double surface, thereby effectively strengthening the insulating rubber layer at the pulled location. While ensuring the strength, the weak points caused by rubber deformation can be reinforced by the thickness of the honeycomb isolation mesh layer 8 that is strengthened after extrusion.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-voltage cable that prevents breakdown, comprising a high-voltage cable body and a tensile reminder layer arranged outside the high-voltage cable body, characterized in that: The high-voltage cable body is composed of a plurality of internal conductor layers, a filling layer (6) in the middle, and an external elastic isolation layer, and the tensile reminder layer is located on the outer surface of the elastic isolation layer; The conductor layer is composed of a metal wire core conductor (1), an inner semi-conductive layer (2) and an inner insulating layer (3); the elastic isolation layer is composed of an inner protective rubber layer (4), a braided mesh rubber filler and an outer rubber connecting layer (5); The conductor layers are evenly distributed inside the inner protective rubber layer (4), and the filling layer (6) is filled with a filler inside the inner protective rubber layer (4) to limit the movement between the conductor layers; The tensile reminder layer comprises a beveled sleeve arranged on the surface of the outer rubber connection layer (5), and the beveled sleeve is composed of a plurality of beveled sleeve rings (7) connected to the outer surface of the outer rubber connection layer (5); A protective cavity (10) is formed between the beveled collar (7) and the outer rubber connecting layer (5), and an inert gas is injected into the protective cavity (10) to prevent oxygen from oxidizing the high-voltage cable body; Each of the beveled collars (7) constituting the beveled sleeve forms a sealed space with the outer rubber connecting layer (5); The outer surface of the bevel collar (7) is provided with an inclined reflective strip (11) for reminding the tension bearing strength. When the bevel collar (7) is deformed, the angle of the inclined reflective strip (11) will be deflected, which will obviously produce a sharp contrast with the inclined reflective strips (11) on the bevel collars (7) on both sides that are not subjected to tension.

2. The anti-breakdown high-voltage cable according to claim 1, characterized in that: The woven mesh rubber filling body comprises a honeycomb isolation mesh layer (8), the honeycomb isolation mesh layer (8) is located between the inner protective rubber layer (4) and the outer rubber connecting layer (5), and the honeycomb isolation mesh layer (8) is filled with a flame retardant rubber layer (9) formed of flame retardant rubber.

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