Reinforced medium-voltage power cable with power cable sheath

Abstract

The utility model discloses a reinforced medium voltage power cable with a power cable sheath, comprising an outer sleeve shell, the inner side of the outer sleeve shell is fixedly connected with an air bag, the air bag is annular, the inner side of the air bag is fixedly provided with an outer shielding layer, the inner side of the outer shielding layer is fixedly provided with an insulating layer, and the inner side of the insulating layer is fixedly provided with a sheath. And an inner shielding layer is fixedly arranged on the inner side of the insulating layer. By arranging an outer sleeve shell, an air bag, an outer shielding layer, an insulating layer, an inner shielding layer, a stabilizing layer, an inner sleeve shell, a cable core, a cavity, an air nozzle and a valve, the air bag and the cavity are additionally arranged outside the cable, the air bag is filled with high-pressure gas, the cavity is filled with insulating distilled water, once the outside of the cable is damaged, the gas is released outwards, and the cable is prevented from being damaged. When the high-pressure gas is discharged, a large amount of noise is accompanied, and the distilled water wets the nearby ground when being discharged, a prompt effect can be achieved, so that the safety of the cable is improved, the surface strength of the cable is also improved, and the protection force of the cable is stronger.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a reinforced medium-voltage power cable with a power cable sheath. Background Technique

[0002] Medium-voltage power cables refer to power cables with a rated voltage between 3.6 kV and 36 kV. They are used for power transmission and distribution in the power system and have good voltage resistance performance and reliable insulating materials. The structure of medium-voltage cables usually includes a conductor, an insulating layer, a sheath layer, a filling layer, etc., and can resist voltage stress and interference to a certain extent. These cables are widely used in urban power supply, industrial and mining enterprises, petrochemical industry, construction projects, transportation and other fields.

[0003] In the existing medium-voltage power cables, they are generally laid underground. However, with the continuous progress of urbanization, there are often construction situations on the urban ground, which can easily damage the medium-voltage power cables below. Once the cable is damaged, it will cause a large amount of economic losses. Generally, the existing medium-voltage power cables are also equipped with a protective sleeve or a protective cover on the outside of the cable, but this method is not ideal. It is impossible to know in time whether the cable is touched, and the added protective sleeve or protective cover will also cause poor internal heat dissipation. Content of the Utility Model

[0004] The purpose of the utility model is to provide a reinforced medium-voltage power cable with a power cable sheath. A layer of airbag and cavity is added outside the cable. The airbag is filled with high-pressure gas, and the cavity is filled with insulating distilled water. Once damage occurs outside the cable, gas will be released outward. When the high-pressure gas is released, a large amount of noise will be accompanied. When the distilled water is released, it will wet the nearby ground, both of which can play a warning role. It not only improves the safety of the cable, but also improves the surface strength of the cable, making the protection force of the cable stronger. It can also transfer the internal heat out in time, thereby cooling the inside and enhancing the heat dissipation ability of the cable.

[0005] To achieve the above object, a reinforced medium-voltage power cable with a power cable sheath is provided, including: an outer casing, an airbag is fixedly connected to the inner side of the outer casing, the airbag is annular, an outer shielding layer is fixedly arranged on the inner side of the airbag, an insulating layer is fixedly arranged on the inner side of the outer shielding layer, an inner shielding layer is fixedly arranged on the inner side of the insulating layer, a stabilizing layer is fixedly arranged on the inner side of the inner shielding layer, an inner casing is fixedly connected to the inner side of the stabilizing layer, a cable core is fixedly arranged on the inner side of the inner casing, the number of the inner casings and the cable cores is multiple, and they are evenly distributed inside the stabilizing layer, a nozzle is fixedly connected to the front side wall of the airbag, a valve is fixedly connected to the circumferential surface of the nozzle, the number of the airbag, the nozzle and the valve is multiple, and they are evenly distributed before and after on the inner side of the outer casing, a cavity is arranged between two adjacent airbags, and the number of the cavities is multiple.

[0006] According to the above-mentioned reinforced medium-voltage power cable with a power cable sheath, the airbag is made of thermoplastic elastomer material. The thermoplastic elastomer material combines the characteristics of plastics and rubbers, shows high elasticity of rubber at normal temperature, can be plasticized and formed at high temperature, does not require vulcanization, and also improves the overall strength of the cable.

[0007] According to the above-mentioned reinforced medium-voltage power cable with a power cable sheath, the internal air pressure of the airbag is three times the standard atmospheric pressure. When the airbag is damaged, the internal gas of the airbag will quickly rush out, thus forming a noise to indicate damage to the outer surface of the cable, so as to stop the construction in time.

[0008] According to the above-mentioned reinforced medium-voltage power cable with a power cable sheath, the inner casing is made of a heat-conducting insulating sheet. The heat-conducting insulating sheet has both heat-conducting function and can achieve insulating function, and can quickly dissipate the internal heat.

[0009] According to the above-mentioned reinforced medium-voltage power cable with a power cable sheath, the cavity is filled with distilled water, and the water pressure is twice the water pressure under standard atmospheric pressure. When the cavity is damaged, the distilled water inside the cavity will quickly rush out, thus wetting the nearby ground to indicate damage to the outer surface of the cable, so as to stop the construction in time.

[0010] According to the above-mentioned reinforced medium-voltage power cable with a power cable sheath, the outer casing is made of polycarbonate material. Polycarbonate is a plastic material with high toughness and high impact strength, and at the same time has the characteristics of resisting chemical corrosion, strong wear resistance and good insulation.

[0011] According to the above-mentioned reinforced medium-voltage power cable with a power cable sheath, both the outer shielding layer and the inner shielding layer are made of copper mesh sleeves woven by oxygen-free copper wires. They are used to shield the magnetic field generated by the internal cable.

[0012] According to the described enhanced medium-voltage power cable with a power cable sheath, the stabilizing layer is made of mica particles. Mica particles have good insulation and heat conduction properties. They can not only form internal protection, play an insulating role, but also transfer heat outward, improving the cable strength and insulation ability.

[0013] According to the described enhanced medium-voltage power cable with a power cable sheath, the insulating layer is made of silicone rubber. Silicone rubber has good heat conduction and electrical insulation properties, and features such as high temperature resistance, moisture resistance, waterproof, corrosion prevention, oxidation resistance, and wear resistance.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By setting the outer shell, airbag, outer shielding layer, insulating layer, inner shielding layer, stabilizing layer, inner shell, cable core, cavity, air nozzle and valve, an airbag and a cavity are added outside the cable. The airbag is filled with high-pressure gas, and the cavity is filled with insulating distilled water. Once damage occurs outside the cable, gas will be released outward. A large amount of noise will be generated when the high-pressure gas is released, and the nearby ground will be wetted when the distilled water is released, both of which can play a warning role, improving the safety of the cable and the surface strength of the cable, making the cable more protective;

[0016] 2. By setting the cavity, inner shell, stabilizing layer and insulating layer, the internal heat can be transferred outward in time, thereby cooling the interior and enhancing the heat dissipation ability of the cable.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following further illustrates the present utility model in conjunction with the drawings and embodiments;

[0019] Figure 1 It is the front view of an enhanced medium-voltage power cable with a power cable sheath of the present utility model;

[0020] Figure 2 It is the sectional view of an enhanced medium-voltage power cable with a power cable sheath of the present utility model.

[0021] In the figure: 1. Outer shell; 2. Airbag; 3. Outer shielding layer; 4. Insulating layer; 5. Inner shielding layer; 6. Stabilizing layer; 7. Inner shell; 8. Cable core; 9. Cavity; 10. Air nozzle; 11. Valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0023] Please refer to Figure 1-2 , the present utility model provides a technical solution: a reinforced medium-voltage power cable with a power cable sheath, including: an outer casing 1, the outer casing 1 is made of polycarbonate material, polycarbonate is a plastic material with high toughness and high impact strength, and at the same time has the characteristics of resisting chemical corrosion, strong wear resistance, good insulation, etc. An airbag 2 is fixedly connected to the inner side of the outer casing 1. The airbag 2 is made of thermoplastic elastomer material. The thermoplastic elastomer material combines the characteristics of plastic and rubber, shows high elasticity of rubber at normal temperature, can be plasticized and formed at high temperature, and does not require vulcanization, and also improves the overall strength of the cable. The airbag 2 is annular, and the internal air pressure of the airbag 2 is three times the standard atmospheric pressure. When the airbag 2 is damaged, the gas inside the airbag 2 will quickly rush out, thus forming a noise to indicate damage to the outer surface of the cable, so as to stop construction in time. An outer shielding layer 3 is fixedly arranged on the inner side of the airbag 2. An insulating layer 4 is fixedly arranged on the inner side of the outer shielding layer 3. The insulating layer 4 is made of silicone rubber material. Silicone rubber has good heat conduction performance and electrical insulation performance, is high temperature resistant, moisture resistant, waterproof, corrosion resistant, antioxidant, wear resistant, etc. An inner shielding layer 5 is fixedly arranged on the inner side of the insulating layer 4. A stabilizing layer 6 is fixedly arranged on the inner side of the inner shielding layer 5. The stabilizing layer 6 is made of mica particle material. Mica particles have good insulation performance and heat conduction performance, can not only form protection inside, but also play an insulating role, and can also transfer heat outward to improve the cable strength and insulation ability. An inner casing 7 is fixedly connected to the inner side of the stabilizing layer 6. The inner casing 7 is made of a heat-conducting insulating sheet, which has both heat-conducting function and insulation function, and can quickly dissipate the internal heat. A cable core 8 is fixedly arranged on the inner side of the inner casing 7. The number of the inner casing 7 and the cable core 8 is multiple, and they are evenly distributed inside the stabilizing layer 6. A nozzle 10 is fixedly connected to the front side wall of the airbag 2. A valve 11 is fixedly connected to the circumferential surface of the nozzle 10 for inflating the inside of the airbag 2. The number of the airbag 2, the nozzle 10 and the valve 11 is multiple, and they are evenly distributed in the front and back on the inner side of the outer casing 1. A cavity 9 is arranged between two adjacent airbags 2. The number of the cavities 9 is multiple. The inside of the cavity 9 is filled with distilled water, and the water pressure is twice the water pressure under the standard air pressure. When the cavity 9 is damaged, the distilled water inside the cavity 9 will quickly rush out, thus wetting the nearby ground to indicate damage to the outer surface of the cable, so as to stop construction in time.

[0024] Both the outer shielding layer 3 and the inner shielding layer 5 are made of copper mesh sleeves woven from oxygen-free copper wires, which are used to shield the magnetic field generated by the internal cable.

[0025] Working principle: An airbag 2 and a cavity 9 are added outside the cable. The airbag 2 is filled with high-pressure gas, and the cavity 9 is filled with insulating distilled water. Once damage occurs outside the cable, gas will be released outward. A large amount of noise will be generated when the high-pressure gas is released, and the nearby ground will be wetted when the distilled water is released, both of which can serve as a reminder. This not only improves the safety of the cable but also enhances the surface strength of the cable, making the cable more protective. At the same time, the inner sleeve 7, the stabilizing layer 6, and the insulating layer 4 inside the cable can transfer the internal heat outward, thereby enhancing the heat dissipation capacity of the cable.

[0026] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present utility model.

Claims

1. A reinforced medium voltage power cable with a power cable sheath, characterized in that: include: An outer shell (1), an airbag (2) is fixedly connected to the inner side of the outer shell (1), the airbag (2) is annular, an outer shielding layer (3) is fixedly arranged on the inner side of the airbag (2), an insulating layer (4) is fixedly arranged on the inner side of the outer shielding layer (3), an inner shielding layer (5) is fixedly arranged on the inner side of the insulating layer (4), a stabilizing layer (6) is fixedly arranged on the inner side of the inner shielding layer (5), an inner shell (7) is fixedly connected to the inner side of the stabilizing layer (6), and a cable core (8) is fixedly arranged on the inner side of the inner shell (7). ), the inner shell (7) and the cable core (8) are provided in plural numbers and are evenly distributed inside the stabilizing layer (6), an air nozzle (10) is fixedly connected to the front side wall of the airbag (2), and a valve (11) is fixedly connected to the circumferential surface of the air nozzle (10), the airbag (2), the air nozzle (10) and the valve (11) are provided in plural numbers and are evenly distributed front and back on the inner side of the outer shell (1), and a cavity (9) is provided between two adjacent airbags (2), and the cavity (9) is provided in plural numbers.

2. A reinforced medium voltage power cable with a power cable sheath as claimed in claim 1, characterized in that: The internal air pressure of the airbag (2) is three times the standard atmospheric pressure.

3. A reinforced medium voltage power cable with a power cable sheath as claimed in claim 1, characterized in that: The interior of the cavity (9) is filled with distilled water, and the water pressure is twice the water pressure under standard atmospheric pressure.

4. A reinforced medium voltage power cable with a power cable sheath as claimed in claim 1, characterized in that: The outer shielding layer (3) and the inner shielding layer (5) are both made of copper mesh sleeves woven from oxygen-free copper wires.

5. A reinforced medium voltage power cable with a power cable sheath as claimed in claim 1, characterized in that: The stabilizing layer (6) is made of mica particles.

6. A reinforced medium voltage power cable with a power cable sheath as claimed in claim 1, characterized in that: The inner casing (7) is made of a heat-conducting insulating sheet.

7. A reinforced medium voltage power cable with a power cable sheath as claimed in claim 1, characterized in that: The outer shell (1) is made of polycarbonate.

8. A reinforced medium voltage power cable with a power cable sheath as claimed in claim 1, characterized in that: The airbag (2) is made of thermoplastic elastomer material.

9. A reinforced medium voltage power cable with a power cable sheath as claimed in claim 1, characterized in that: The insulating layer (4) is made of silicone rubber.

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