Automatic monitoring power cable

Abstract

The invention discloses an automatic monitoring power cable which comprises a wire, a first coating layer is arranged outside the wire, a second coating layer is arranged outside the first coating layer, an insulating layer is arranged outside the second coating layer, and a plurality of warning positioning mechanisms are arranged between the second coating layer and the insulating layer. According to the invention, when fog water or rainwater in the environment enters a damaged part of an insulating layer, a spherical sponge absorbs water and expands, so that the spherical sponge protrudes outwards, a worker can accurately position the insulating layer, and because the spherical sponge, a filling sponge and a columnar sponge all have water absorbability, heat transfer is carried out between water and a bottom ring block, so that the damage of the insulating layer is avoided. Therefore, the temperature of the bottom ring block at the position is lower than that of other bottom ring blocks at the positions where the insulating layers are not aged or damaged, the temperature is found in time through detection of the temperature measuring cable, the position is overhauled in time, further damage to the insulating layers is avoided, the service life of the power cable is greatly prolonged, and the safety in the using process is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of power cables, and in particular to an automatically monitored power cable. Background Art

[0002] Conventional power cables are mainly composed of conductors, insulation layers and protective layers. They are electrical equipment used to transmit and distribute electrical energy. They have a wide range of application scenarios, including but not limited to urban underground power grids, power station lead-out lines and underwater transmission lines across rivers and seas. In outdoor application scenarios such as power station lead-out lines, the aging degree of the external insulation layer of the power cable is aggravated, and it may also be further damaged by small animals, thus leading to economic losses due to power short circuits.

[0003] At present, the monitoring of the external insulation layer of power cables in outdoor application scenarios such as the lead-out lines of power stations mainly relies on manual work. Through inspections, the situation and location of insulation layer damage are proactively discovered, and inspections and maintenance are carried out in a timely manner to avoid risks.

[0004] However, this manual monitoring method is not only costly but also has low monitoring efficiency. It is difficult to find the exact area where the insulation layer is damaged, which makes maintenance untimely and increases the possibility of risks. Summary of the invention

[0005] The object of the present invention is to provide an automatically monitored power cable to solve the problems raised in the above background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] An automatically monitored power cable comprises a conductor, wherein a first coating layer is disposed on the outside of the conductor, a second coating layer is disposed on the outside of the first coating layer, an insulating layer is disposed on the outside of the second coating layer, and a plurality of warning positioning mechanisms are disposed between the second coating layer and the insulating layer;

[0008] The warning positioning mechanism includes a bowl head, a bottom ring block is arranged at the bottom of the bowl head, an inner cavity is arranged inside the bowl head and the bottom ring block, a leak is arranged between the bowl head and the bottom ring block, and a plurality of penetration holes are arranged on the inner side wall of the bowl head;

[0009] A plurality of temperature measuring cables are arranged in the second coating layer, and the bottom ring block is sleeved on the temperature measuring cables;

[0010] The inner side wall of the bowl head is fixedly connected with a spherical sponge, and the spherical sponge is arranged in the insulating layer;

[0011] A filling sponge is arranged inside the inner cavity, and the filling sponge and the spherical sponge are connected through a columnar sponge.

[0012] Preferably, the bowl head is configured as a half hollow sphere, the bottom ring block is configured as a cylindrical ring, and the bowl head and the bottom ring block are fixedly connected.

[0013] Preferably, the bottom ring block is placed inside the second coating layer, and the main body of the bowl head is placed inside the insulating layer.

[0014] Preferably, the inner cavity provided inside the bowl head and the inner cavity provided inside the bottom ring block are connected through a leak.

[0015] Preferably, the concave side of the bowl head is connected to an inner cavity arranged inside the bowl head through a penetration hole.

[0016] Preferably, the bowl head is made of a water-impermeable material, and the bottom ring block is also made of a water-impermeable material.

[0017] Preferably, the material of the bowl head and the bottom ring block can be plastic.

[0018] Preferably, three conductive wires are provided, and the three conductive wires are arranged in the first coating layer at equal distances around the central axis of the first coating layer.

[0019] Preferably, a plurality of the warning positioning mechanisms are arranged at equal distances around the central axis of the first coating layer, and a plurality of the warning positioning mechanisms in each circle are arranged at equal distances along the length direction of the wire.

[0020] Preferably, a plurality of the temperature measuring cables are arranged at equal distances around the central axis of the first covering layer, and the number of the warning positioning mechanisms in each circle is the same as the number of the temperature measuring cables.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention utilizes that when fog water or rainwater in the environment enters the damaged part of the insulating layer, the spherical sponge expands after absorbing water, thereby bulging outward, so that the staff can accurately locate it. Since the spherical sponge, filling sponge and columnar sponge are all water-absorbent, water will transfer heat with the bottom ring block, thereby making the temperature of the bottom ring block at this place lower than the bottom ring blocks at other places where the insulating layer is not aged or damaged, so that the staff can be informed of the abnormality at this place, discover it in time, and repair it in time to avoid further damage to the insulating layer, thereby greatly improving the service life of the power cable and the safety during use.

[0023] 2. The present invention increases the resistance to the relative movement of the insulating layer and the second covering layer by setting a warning positioning mechanism, so that the connection between the insulating layer and the second covering layer is more stable, and the connection between the insulating layer and the second covering layer is tighter, which is conducive to the outward diffusion of heat generated during the operation of the conductor, avoiding overheating inside the power cable, and greatly improving safety.

[0024] 3. The present invention utilizes the water-impermeable material of the bowl head and the bottom ring block, so that the water at the aged or damaged part of the insulating layer is absorbed into the inner cavity, thereby preventing the water from further corroding the aged or damaged part and preventing the further expansion of the damaged part.

[0025] 4. The present invention utilizes the heat generated when the conductor is in operation, and the water absorbed by the filling sponge and the spherical sponge arranged inside the inner cavity evaporates through the heat transfer between the bottom ring block and the bowl head at high temperature. When the aging or damage of the insulating layer is repaired, the warning positioning mechanism can still play a role. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0029] Figure 3 It is a structural schematic diagram of the warning positioning mechanism in the present invention;

[0030] Figure 4 is a cross-sectional view of the warning positioning mechanism of the present invention;

[0031] Figure 5 It is a schematic diagram of the connection between the filling sponge and the columnar sponge in the present invention.

[0032] In the figure: 1. conductor; 2. first coating layer; 3. second coating layer; 4. insulating layer; 5. spherical sponge; 501. filling sponge; 502. columnar sponge; 6. temperature measuring cable; 7. warning positioning mechanism; 701. bowl head; 702. bottom ring block; 703. penetration hole; 704. inner cavity; 705. leakage. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Reference Figure 1-4As shown, the present invention is an automatically monitored power cable, comprising a conductor 1, a first coating layer 2 is arranged on the outside of the conductor 1, wherein the material of the first coating layer 2 can be set to nylon material, a second coating layer 3 is arranged on the outside of the first coating layer 2, wherein the material of the second coating layer 3 can be set to polypropylene material, an insulating layer 4 is arranged on the outside of the second coating layer 3, wherein the material of the insulating layer 4 can be set to plastic or rubber, and a plurality of warning positioning mechanisms 7 are arranged between the second coating layer 3 and the insulating layer 4.

[0035] Reference Figure 2 As shown, the warning positioning mechanism 7 includes a bowl head 701, a bottom ring block 702 is arranged at the bottom of the bowl head 701, an inner cavity 704 is arranged inside the bowl head 701 and the bottom ring block 702, a leak 705 is arranged between the bowl head 701 and the bottom ring block 702, and a plurality of penetration holes 703 are arranged on the inner wall of the bowl head 701.

[0036] Among them, a plurality of temperature measuring cables 6 are arranged in the second coating layer 3, and the bottom ring block 702 is sleeved on the temperature measuring cable 6. The inner side wall of the bowl head 701 is fixedly connected with a spherical sponge 5, and the spherical sponge 5 is arranged in the insulating layer 4. A filling sponge 501 is arranged inside the inner cavity 704. The filling sponge 501 and the spherical sponge 5 are connected through a columnar sponge 502, that is, the columnar sponge 502 passes through the penetration hole 703. It should be supplemented that a dry pigment can be arranged inside the spherical sponge 5, and the color of the pigment needs to be eye-catching, such as red. When the spherical sponge 5 absorbs water, not only its own volume expands, but the dry pigment forms a colored solution after meeting water, which fully impregnates the spherical sponge 5, making the spherical sponge 5 more eye-catching. At the same time, the overflowed colored solution falls on the ground, making it easier for maintenance personnel to find abnormal points, so that the efficiency of maintenance is significantly improved. The bowl head 701 is set as a half hollow sphere, and the bottom ring block 702 is set as a cylindrical ring. The bowl head 701 and the bottom ring block 702 are fixedly connected.

[0037] It should be noted that, referring to Figure 1 As shown, several warning positioning mechanisms 7 are arranged at equal distances around the central axis of the first coating layer 2, and several warning positioning mechanisms 7 in each circle are arranged at equal distances along the length direction of the conductor 1. Several temperature measuring cables 6 are arranged at equal distances around the central axis of the first coating layer 2, and the number of several warning positioning mechanisms 7 in each circle is the same as the number of temperature measuring cables 6.

[0038] Among them, refer to Figure 2As shown, the bottom ring block 702 is placed inside the second coating layer 3, the main part of the bowl head 701 is placed inside the insulating layer 4, the inner cavity 704 set inside the bowl head 701 and the inner cavity 704 set inside the bottom ring block 702 are connected through the leak 705, and the concave side of the bowl head 701 is connected with the inner cavity 704 set inside the bowl head 701 through the penetration hole 703. The material of the bowl head 701 is a waterproof material, and the material of the bottom ring block 702 is also a waterproof material, wherein the material of the bowl head 701 and the bottom ring block 702 can be selected as plastic. The material of the bowl head 701 and the bottom ring block 702 is set to plastic, so that it can isolate and store water, thereby ensuring that the warning positioning mechanism 7 can operate normally.

[0039] Reference Figure 1 As shown, three wires 1 are arranged, and the three wires 1 are arranged at equal distances around the central axis of the first coating layer 2. Through such an arrangement, it is avoided that two wires 1 are closer to the third wire 1, resulting in excessive local heat in the first coating layer 2, thereby affecting heat dissipation.

[0040] The working principle of the present invention is now explained through the working process: when the power cable is applied to outdoor application scenarios such as the lead-in line of a power station, when the insulating layer 4 is aged or damaged due to the harsh environment in which it is located or damage by small animals at night, the spherical sponge 5 will be exposed. Since the mist water will condense on the surface of the insulating layer 4 of the power cable when the outdoor temperature is low or rainwater is directly poured on the surface of the insulating layer 4 on rainy days, the spherical sponge 5 will expand after absorbing water and bulge outward, so that the staff can accurately position it. Since the spherical sponge 5, the filling sponge 501 and the columnar sponge 502 are all water-absorbent, the filling sponge 501 will absorb water into the inner cavity 704 through the columnar sponge 502. At this time, the Due to the cooling effect of water, and the bottom ring block 702 is sleeved on the temperature measuring cable 6, at this time, the temperature detected by the temperature measuring cable 6 at the aged or damaged part of the insulating layer 4 will be lower than other normal places. This is because the conductor 1 will generate heat when working, and the heat diffuses outward to the second coating layer 3, so that the temperature inside the second coating layer 3 is higher than the temperature of the water. Therefore, the water will transfer heat with the bottom ring block 702, and then the temperature of the bottom ring block 702 at this place is lower than the bottom ring block 702 at other insulating layers 4 that are not aged or damaged, so that the staff can be informed of the abnormality at this place, discover it in time, and repair it in time to avoid further damage to the insulating layer 4, thereby greatly improving the service life of the power cable and the safety during use.

[0041] It should be supplemented that, due to the setting of the warning positioning mechanism 7, and the bottom ring block 702 is located in the second coating layer 3, the main part of the bowl head 701 is located in the insulating layer 4, the bottom ring block 702 and the bowl head 701 are a whole, which increases the resistance to the relative movement of the insulating layer 4 and the second coating layer 3, makes the connection between the insulating layer 4 and the second coating layer 3 more stable, and the connection between the insulating layer 4 and the second coating layer 3 is closer, which is conducive to the outward diffusion of the heat generated during the operation of the conductor 1, avoids overheating inside the power cable, and greatly improves the safety.

[0042] It should be supplemented that the setting of the temperature measuring cable 6 can also monitor the internal temperature of the power cable in real time during operation to avoid danger caused by excessive temperature.

[0043] Since the conductor 1 generates heat during operation, the water absorbed by the filling sponge 501 and the spherical sponge 5 arranged inside the inner cavity 704 evaporates through the heat transfer between the bottom ring block 702 and the bowl head 701 at high temperature. When the aging or damage of the insulating layer 4 is repaired, the warning positioning mechanism 7 can still play a role. Since the materials of the bowl head 701 and the bottom ring block 702 are both impermeable materials, the water at the aging or damaged part of the insulating layer 4 is absorbed into the inner cavity 704, thereby preventing the water from further corroding the aging or damaged part and preventing the further expansion of the damaged part.

[0044] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An automatic monitoring power cable, characterized in that: The invention comprises a wire (1), wherein a first coating layer (2) is arranged outside the wire (1), a second coating layer (3) is arranged outside the first coating layer (2), an insulating layer (4) is arranged outside the second coating layer (3), and a plurality of warning positioning mechanisms (7) are arranged between the second coating layer (3) and the insulating layer (4); The warning positioning mechanism (7) comprises a bowl head (701), a bottom ring block (702) is arranged at the bottom of the bowl head (701), an inner cavity (704) is arranged inside the bowl head (701) and the bottom ring block (702), a leak (705) is arranged between the bowl head (701) and the bottom ring block (702), and a plurality of penetration holes (703) are arranged on the inner side wall of the bowl head (701); A plurality of temperature measuring cables (6) are arranged in the second coating layer (3), and the bottom ring block (702) is sleeved on the temperature measuring cables (6); A spherical sponge (5) is fixedly connected to the inner side wall of the bowl head (701), and the spherical sponge (5) is arranged in the insulating layer (4); A filling sponge (501) is disposed inside the inner cavity (704), and the filling sponge (501) and the spherical sponge (5) are connected via a columnar sponge (502).

2. The automatic monitoring power cable according to claim 1, characterized in that: The bowl head (701) is configured to be a half hollow sphere, the bottom ring block (702) is configured to be a cylindrical ring, and the bowl head (701) and the bottom ring block (702) are fixedly connected.

3. The automatic monitoring power cable according to claim 1, characterized in that: The bottom ring block (702) is placed inside the second coating layer (3), and the main body of the bowl head (701) is placed inside the insulating layer (4).

4. The automatic monitoring power cable according to claim 1, characterized in that: The inner cavity (704) provided inside the bowl head (701) and the inner cavity (704) provided inside the bottom ring block (702) are connected via the leak (705).

5. The automatic monitoring power cable according to claim 1, characterized in that: The concave side of the bowl head (701) is connected to an inner cavity (704) provided inside the bowl head (701) through a penetration hole (703).

6. The automatic monitoring power cable according to claim 1, characterized in that: The bowl head (701) is made of a water-impermeable material, and the bottom ring block (702) is also made of a water-impermeable material.

7. The automatic monitoring power cable according to claim 6, characterized in that: The material of the bowl head (701) and the bottom ring block (702) can be plastic.

8. The automatic monitoring power cable according to claim 1, characterized in that: Three conductive wires (1) are provided, and the three conductive wires (1) are arranged in the first coating layer (2) at equal distances around the central axis of the first coating layer (2).

9. The automatic monitoring power cable according to claim 1, characterized in that: A plurality of the warning positioning mechanisms (7) are arranged at equal distances around the central axis of the first coating layer (2), and a plurality of the warning positioning mechanisms (7) in each circle are arranged at equal distances along the length direction of the wire (1).

10. The automatic monitoring power cable according to claim 9, characterized in that: A plurality of the temperature measuring cables (6) are arranged at equal distances around the central axis of the first coating layer (2), and the number of the warning positioning mechanisms (7) in each circle is the same as the number of the temperature measuring cables (6).

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