High-voltage cable with warning function

Abstract

According to the high-voltage cable with the warning function, the high-voltage cable is applied to the related technical field of cables, through the arrangement of the self-induction channel, when the cable is not damaged, inert gas in the cable can improve the overall elasticity of the cable, so that the cable is buffered and protected, and when the cable is damaged, the cable is not damaged. Inert gas in the self-induction channel exchanges with outside air, on one hand, the audible and visual alarm can be triggered to remind workers of timely maintenance, on the other hand, under the action of the one-way air closing piece, the multiple warning rings between the damage point and the node ring can change colors synchronously, the warning area can be enlarged, and the safety of the damage point is improved. And meanwhile, maintenance personnel can be helped to quickly position a damage point, the maintenance efficiency is improved, and compared with the prior art, warning and maintenance can be performed before the cable is completely broken down, so that the potential safety hazard is greatly reduced.

Description

Technical Field

[0001] A high-voltage cable related to the present invention, in particular, a high-voltage cable with a warning function applied to the technical field related to cables. Background Art

[0002] A high-voltage cable is a type of power cable, which refers to a power cable used for transmitting electricity between 1 kV and 1000 kV, and is mostly applied to power transmission and distribution. The components of a high-voltage cable from the inside to the outside include: a conductor, insulation, an inner sheath, a filler (armor), and an outer insulation.

[0003] When the cable load is high, the temperature of the core wire rises, and the cable expands due to heat, so the cable is prone to the phenomenon of cable breakdown. In addition, during use, some cables are exposed to the outside, and are also likely to be damaged due to accidental extrusion, friction, dragging, etc., resulting in breakdown. However, when the breakdown phenomenon occurs, it is difficult to detect in time. When the power system continues to transmit electricity under such circumstances, there are relatively large potential safety hazards.

[0004] To solve the above problems, the Chinese patent specification with the publication number CN118692740A discloses a power cable with a temporary repair function. By setting different colors of adhesives, it can not only enable the cable core body to work normally when there is a crack outside, but also facilitate maintenance personnel to find the damaged position, play a warning role, and facilitate quick problem-solving. However, this method mainly relies on manual inspection, and there is a possibility of missed inspection when there is an abnormality, resulting in certain potential safety hazards still existing.

[0005] The Chinese patent specification with the publication number CN119314738A discloses an automatically monitored power cable. When fog water or rainwater in the environment enters the damaged part of the insulation layer, the spherical sponge swells after absorbing water and thus protrudes outwards, enabling the staff to accurately locate. Since the spherical sponge, the filling sponge, and the columnar sponge all have water absorption, the water will conduct heat transfer with the bottom ring block, and then the temperature of the bottom ring block at this place is lower than that of the bottom ring blocks at other parts of the insulation layer that are not aged or damaged, enabling the staff to know that there is an abnormality here, discover it in time, and repair it in time to avoid further damage to the insulation layer, greatly improving the service life and safety during use of this power cable. However, its display of the damaged part depends on external water. However, on the one hand, it is greatly affected by the weather. When there is no rainy day, it is very difficult to display the damaged point. And when it is damaged and water contacts it, there is also a risk of electric leakage. This method of locating the damaged point has certain potential safety hazards.

[0006] Therefore, a high-voltage cable with a warning function is proposed, which does not need to rely on manual inspection, and after being damaged, the damaged point can be directly displayed under the condition of low potential safety hazards. Summary of the Invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the cable is prone to wear and breakdown, and it is difficult to detect the abnormal damage in time in this case, posing a great potential safety hazard.

[0008] To solve the above problems, the present invention provides a high-voltage cable with a warning function, which includes a plurality of cable cores. The outer ends of the plurality of cable cores are wrapped with an insulating layer, the insulating layer is wrapped with an inner protective layer, and the inner protective layer is wrapped with a plurality of warning protective sleeves fixedly connected in sequence along the axial direction of the inner protective layer. The warning protective sleeve includes an outer protective sleeve, a node ring fixedly connected to the end of the outer protective sleeve, and a plurality of warning rings fixedly connected to the outer end of the outer protective sleeve;

[0009] A gathering cavity is formed inside the node ring, an air sensor is installed inside the gathering cavity, an audible and visual alarm is fixedly installed at the outer end of the node ring, and the audible and visual alarm is signal-connected to the air sensor. A self-inductance channel is formed inside the outer protective sleeve, a gas guide pipe is fixedly connected to the inner wall of the warning ring, and the gas guide pipe fixedly penetrates the outer end of the outer protective sleeve and communicates with the self-inductance channel;

[0010] The self-inductance channel includes a plurality of annular inner cavities and a plurality of through cavity holes respectively located between adjacent two annular inner cavities. The plurality of through cavity holes and the plurality of warning rings are distributed at intervals. A one-way airtight sheet is fixedly connected to the inner wall of the through cavity hole. An air vent hole is also formed at one end of the node ring facing the outer protective sleeve, and the air vent hole communicates the annular inner cavity and the gathering cavity. The gathering cavity and the plurality of annular inner cavities are all saturated with an inert gas.

[0011] In the above high-voltage cable with a warning function, through the setting of the self-inductance channel, when there is no damage, the inert gas inside can improve the overall elasticity of the cable, thus playing a buffering and protecting role for the cable. When damaged, the inert gas in the self-inductance channel will exchange gas with the outside air. On the one hand, it can trigger the audible and visual alarm to facilitate reminding the staff to perform maintenance in time. On the other hand, the warning rings at the damaged site on the spot will change color significantly, enabling the maintenance personnel to quickly locate the damaged point and improve the maintenance efficiency.

[0012] As a further improvement of the present application, the warning ring is a hollow transparent structure, and the inner wall of the warning ring is coated with polyphenol oxidase.

[0013] As a further improvement of the present application, the gas guide pipe communicates with the annular inner cavity, and the warning ring is also saturated with an inert gas inside.

[0014] As a further improvement of the present application, the one-way airtight sheet includes a positioning ring and an adaptive sheet fixedly connected to one end of the positioning ring close to the node ring. The adaptive sheet includes two wall-adhering half rings, a pre-bent section fixedly connected between the ends of the two wall-adhering half rings, and a shielding sheet fixedly connected to the inner walls of the wall-adhering half rings and the pre-bent section. The pre-bent section and the two pre-bent sections enclose a complete ring.

[0015] As a further improvement of the present application, the upper adhering semi-ring is fixedly connected to the positioning ring, the lower adhering semi-ring is in contact with but not fixed to the positioning ring, both adhering semi-rings are of a rigid structure, the pre-bending section is of an elastic structure, and the shielding piece is made of a sealed flexible material.

[0016] As a further improvement of the present application, an indicating ring groove is also drilled at the outer end of the node ring, and the indicating ring groove is misaligned with the aggregation cavity.

[0017] As another improvement of the present application, the self-sensing channel further includes a plurality of annular outer cavities drilled inside the outer protective sleeve. The plurality of annular outer cavities are respectively distributed at intervals from a plurality of air ducts. The plurality of annular outer cavities are coaxial with the annular inner cavity and are located outside the annular inner cavity.

[0018] As a supplement to another improvement of the present application, in one or two annular outer cavities adjacent to the air duct, the air duct is in communication with the annular outer cavity close to the node ring side.

[0019] In summary, through the setting of the self-sensing channel, when there is no damage, the inert gas inside can improve the overall elasticity of the cable, thus playing a role in buffering and protecting the cable. When damaged, the inert gas in the self-sensing channel will exchange gas with the outside air. On the one hand, it can trigger the sound and light alarm, facilitating the reminder for the staff to carry out maintenance in time. On the other hand, under the action of the one-way airtight piece, multiple warning rings between the damaged point and the node ring can change color synchronously, which can not only expand the warning area but also help the maintenance personnel quickly locate the damaged point, improving the maintenance efficiency. And, compared with the prior art, it can give a warning before the cable is completely broken down and be maintained and repaired, thereby greatly reducing the potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional view of the cable according to the first embodiment of the present application;

[0021] Figure 2 is a radial cross-sectional view of the first embodiment of the present application;

[0022] Figure 3 is a three-dimensional view of the warning protective sleeve part of the first embodiment of the present application;

[0023] Figure 4 is a semi-sectional three-dimensional view of the warning protective sleeve of the first embodiment of the present application;

[0024] Figure 5 is Figure 4 a schematic diagram at position A in

[0025] Figure 6 is a cross-sectional schematic diagram of the warning protective sleeve of the first embodiment of the present application;

[0026] Figure 7 Is the three-dimensional view of the airtight side of the one-way airtight sheet in the first embodiment of this application;

[0027] Figure 8 Is the three-dimensional view when the airtight side of the one-way airtight sheet in the first embodiment of this application is open;

[0028] Figure 9 Is the three-dimensional view when the ventilation side of the one-way airtight sheet in the first embodiment of this application is open;

[0029] Figure 10 Is the cross-sectional view of the warning protective sleeve when there is damage in the first embodiment of this application;

[0030] Figure 11 Is the three-dimensional schematic of the cable after damage in the first embodiment of this application;

[0031] Figure 12 Is the schematic transverse cross-section of the warning protective sleeve in the second embodiment of this application;

[0032] Figure 13 Is the comparison diagram when the cable is damaged in the first embodiment and the second embodiment of this application.

[0033] Explanation of the reference numerals in the figure:

[0034] 11 Cable core, 12 Insulation layer, 13 Inner protective layer, 21 Outer protective sleeve, 22 Node ring, 23 Warning ring, 201 Indication ring groove, 202 Annular inner cavity, 203 Aggregation cavity, 204 Ventilation hole, 205 Air duct, 206 Through cavity hole, 207 Annular outer cavity, 3 One-way airtight sheet, 31 Positioning ring, 321 Wall-attached half ring, 322 Pre-bent section, 323 Shielding sheet, 4 Air sensor, 5 Acousto-optic alarm. Specific embodiments

[0035] The following describes the two embodiments of this application in detail with reference to the accompanying drawings.

[0036] The first embodiment:

[0037] Figure 1-2Disclosed is a high-voltage cable with a warning function, which includes a plurality of cable cores 11. The outer ends of the plurality of cable cores 11 are wrapped with an insulating layer 12, the insulating layer 12 is wrapped with an inner protective layer 13, and the inner protective layer 13 is wrapped with a plurality of warning protective sleeves fixedly connected in sequence along the axial direction of the inner protective layer 13. The length of one of the warning protective sleeves is not less than 2 meters. The warning protective sleeve includes an outer protective sleeve 21, a node ring 22 fixedly connected to the end of the outer protective sleeve 21, and a plurality of warning rings 23 fixedly connected to the outer end of the outer protective sleeve 21. The warning ring 23 is a hollow transparent structure, and the inner wall of the warning ring 23 is coated with polyphenol oxidase, which is easily oxidized and discolored when encountering air, so as to detect whether the periphery of this cable is damaged.

[0038] As Figure 3-5 , an aggregation cavity 203 is formed inside the node ring 22, an air sensor 4 is installed inside the aggregation cavity 203, an audible and visual alarm 5 is fixedly installed at the outer end of the node ring 22, the audible and visual alarm 5 is signal-connected to the air sensor 4, a self-induction channel is formed inside the outer protective sleeve 21, a gas guide pipe 205 is fixedly connected to the inner wall of the warning ring 23, the gas guide pipe 205 fixedly penetrates the outer end of the outer protective sleeve 21 and communicates with the self-induction channel. When damage occurs and the crack depth reaches the self-induction channel, the amount of inert gas in the self-induction channel will gradually decrease and the air content will gradually increase. After the air sensor 4 detects an obvious change in the air content, it can trigger the audible and visual alarm 5 to give an audible and visual alarm, so that the damage situation of this cable can be detected before it is completely broken down, effectively reducing potential safety hazards.

[0039] As Figure 6 , the self-induction channel includes a plurality of annular inner cavities 202 and a plurality of through cavities 206 respectively located between adjacent two annular inner cavities 202. The plurality of through cavities 206 and the plurality of warning rings 23 are distributed at intervals. A one-way airtight sheet 3 is fixedly connected to the inner wall of the through cavity 206. An air vent 204 is also formed at one end of the node ring 22 facing the outer protective sleeve 21. The air vent 204 communicates the annular inner cavity 202 and the aggregation cavity 203. The aggregation cavity 203 and the plurality of annular inner cavities 202 are both saturated with inert gas. The gas guide pipe 205 communicates with the annular inner cavity 202, and the warning ring 23 is also saturated with inert gas inside. The inert gas can be used as a protective atmosphere, so that when this cable is not damaged, the polyphenol oxidase coated on the inner wall of the protective warning ring 23 is not easily oxidized. Only when damage occurs and air penetrates into the self-induction channel, the warning ring 23 will show a discoloration phenomenon, thus effectively reducing the occurrence of false alarms.

[0040] As Figure 7, the one-way airtight sheet 3 includes a positioning ring 31 and an adaptive sheet fixedly connected to one end of the positioning ring 31 close to the node ring 22, enabling gas to only move along the direction towards the side close to the node ring 22 and not in the reverse direction. The adaptive sheet includes two wall-attached half-rings 321, a pre-bent section 322 fixedly connected between the ends of the two wall-attached half-rings 321, and a shielding sheet 323 fixedly connected to the inner walls of the wall-attached half-rings 321 and the pre-bent section 322. The pre-bent section 322 and the two pre-bent sections 322 form a complete ring. The upper wall-attached half-ring 321 is fixedly connected to the positioning ring 31, the lower wall-attached half-ring 321 is in contact with the positioning ring 31 but not fixedly connected, and both wall-attached half-rings 321 are of rigid structure, the pre-bent section 322 is of elastic structure, and the shielding sheet 323 is made of a sealed flexible material, such as Figure 8-9 , when a breakage occurs, the gas can push the shielding sheet 323 and the lower wall-attached half-ring 321 along the direction towards the side close to the node ring 22, and then reach the aggregation cavity 203, enabling the air to be detected by the air sensor 4. Along the direction away from the node ring 22, under the restriction of the positioning ring 31, the lower wall-attached half-ring 321 is also in contact with the positioning ring 31, making the entire one-way airtight sheet 3 in a closed state, thus preventing the gas from moving towards the side away from the node ring 22, and further enabling only the warning rings 23 on the side of the breakage point close to the node ring 22 to change color, facilitating the indication of the breakage point.

[0041] such as Figure 10 , when a breakage occurs and the breakage depth reaches the annular inner cavity 202, with the infiltration of air, the air sequentially passes through multiple annular inner cavities 202, through holes 206, and reaches the aggregation cavity 203 through the ventilation holes 204, enabling air to enter into multiple warning rings 23 between the breakage point and the node ring 22, causing multiple warning rings 23 between them to all show a color change phenomenon. Due to the one-way passability of the one-way airtight sheet 3, it is difficult for the multiple warning rings 23 in the reverse direction to change color. When the staff arrives at the scene for maintenance, such as Figure 11 , first determine the color-changing location, then find the warning ring 23 that has changed color and is the farthest from the node ring 22. The breakage point is near it, which can effectively narrow down the range of the breakage point, facilitating the determination of the abnormal point and improving the maintenance efficiency.

[0042] An indicating ring groove 201 is also drilled at the outer end of the node ring 22. The indicating ring groove 201 is misaligned with the aggregation cavity 203. The indicating ring groove 201 is used to indicate the truncation point when this cable needs to be truncated, so as to truncate the cable without damaging the internal self-inductance channel.

[0043] In summary, through the setting of the self-sensing channel, when it is not damaged, the inert gas inside can improve the overall elasticity of the cable, thereby playing a buffering and protective role for the cable. When damaged, the inert gas in the self-sensing channel will exchange gas with the outside air. On the one hand, it can trigger the sound and light alarm 5, which is convenient for reminding the staff to perform maintenance in time. On the other hand, under the action of the one-way air-sealing plate 3, the multiple warning circles 23 between the damaged point and the node ring 22 can change color synchronously, which can not only expand the warning area, but also help maintenance personnel to quickly locate the damaged point and improve maintenance efficiency. Moreover, compared with the existing technology, it can issue a warning and be maintained and repaired before the cable is completely broken down, thereby greatly reducing safety hazards.

[0044] Second implementation method:

[0045] This embodiment is based on the first embodiment, and a ring-shaped outer cavity 207 is added, and the rest of the parts are consistent with the first embodiment.

[0046] like Figure 12 The self-sensing channel also includes multiple annular outer cavities 207 excavated inside the outer protective sleeve 21. The multiple annular outer cavities 207 are spaced apart from the multiple air guide tubes 205. The multiple annular outer cavities 207 are coaxial with the annular inner cavity 202 and are located outside the annular inner cavity 202. In one or two annular outer cavities 207 adjacent to the air guide tube 205, the air guide tube 205 is connected to the annular outer cavity 207 on the side close to the node ring 22.

[0047] like Figure 13 When damage occurs from the outside, the cracking path of the damage will first pass through the annular outer cavity 207. Since the multiple annular outer cavities 207 are independent of each other, only the warning circle 23 connected thereto will change color. Since the two annular inner walls of the annular outer cavity 207 are independent of each other, it can also effectively prevent the further cracking of the crack. At the same time, its color change phenomenon can serve as a certain warning to nearby inspection staff. If the crack continues to crack if not handled in time, when it extends to the annular inner cavity 202, it will exchange gas with the outside air, causing the air sensor 4 to sense the air and triggering the sound and light alarm 5. At this time, it can serve as an obvious warning to the staff. After the staff arrives at the scene, they can directly determine the range of the damage point according to the color change of the warning circle 23 and perform maintenance, so that they can perform maintenance before the cable is completely punctured, greatly reducing safety hazards.

[0048] Compared with the first implementation method, the indication range of the damage point is smaller and the accuracy is higher. During specific implementation, a suitable implementation method can be selected according to actual needs.

[0049] Combined with the current actual requirements, the above-mentioned implementation manner adopted in this application, the scope of protection is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A high-voltage cable with a warning function, characterized in that: It includes multiple cable cores (11). The outer ends of the multiple cable cores (11) are wrapped with an insulating layer (12). The insulating layer (12) is wrapped with an inner protective layer (13). Outside the inner protective layer (13), there are multiple warning protective sleeves fixedly connected in sequence along the axial direction of the inner protective layer (13). The warning protective sleeve includes an outer protective sleeve (21), a node ring (22) fixedly connected to the end of the outer protective sleeve (21), and multiple warning rings (23) fixedly connected to the outer end of the outer protective sleeve (21). A gathering cavity (203) is drilled inside the node ring (22). An air sensor (4) is installed inside the gathering cavity (203). An acoustic-optic alarm (5) is fixedly installed at the outer end of the node ring (22). The acoustic-optic alarm (5) is signal-connected to the air sensor (4). A self-induction channel is drilled inside the outer protective sleeve (21). A gas guide pipe (205) is fixedly connected to the inner wall of the warning ring (23). The gas guide pipe (205) fixedly penetrates the outer end of the outer protective sleeve (21) and communicates with the self-induction channel. The self-induction channel includes multiple annular inner cavities (202) and multiple through holes (206) respectively located between adjacent two annular inner cavities (202). The multiple through holes (206) and the multiple warning rings (23) are distributed at intervals. A one-way airtight sheet (3) is fixedly connected to the inner wall of the through hole (206). An air vent hole (204) is also drilled at one end of the node ring (22) facing the outer protective sleeve (21). The air vent hole (204) communicates the annular inner cavity (202) and the gathering cavity (203). The gathering cavity (203) and the multiple annular inner cavities (202) are all saturated and filled with inert gas.

2. The high-voltage cable with a warning function according to claim 1, characterized in that: The warning ring (23) is a hollow transparent structure, and polyphenol oxidase is coated on the inner wall of the warning ring (23).

3. The high-voltage cable with a warning function according to claim 2, wherein: The gas guide pipe (205) communicates with the annular inner cavity (202), and the warning ring (23) is also saturated and filled with inert gas inside.

4. A high-voltage cable with a warning function according to claim 1, characterized in that: The one-way airtight sheet (3) includes a positioning ring (31) and an adaptive sheet fixedly connected to one end of the positioning ring (31) close to the node ring (22). The adaptive sheet includes two wall-adhering half rings (321), a pre-bent section (322) fixedly connected between the ends of the two wall-adhering half rings (321), and a shielding sheet (323) fixedly connected to the inner walls of the wall-adhering half rings (321) and the pre-bent section (322). The pre-bent section (322) and the two pre-bent sections (322) enclose a complete ring.

5. A high-voltage cable with a warning function according to claim 4, characterized in that: The upper wall-adhering half ring (321) is fixedly connected to the positioning ring (31). The lower wall-adhering half ring (321) fits but is not fixedly connected to the positioning ring (31). Both of the two wall-adhering half rings (321) are of rigid structure. The pre-bent section (322) is of elastic structure. The shielding sheet (323) is made of a sealed flexible material.

6. The high-voltage cable with a warning function according to claim 1, wherein: An indicating ring groove (201) is also drilled at the outer end of the node ring (22). The indicating ring groove (201) is misaligned with the gathering cavity (203).

7. The high-voltage cable with a warning function according to claim 2, characterized in that: The self-inductance channel further includes a plurality of annular outer cavities (207) drilled inside the outer protective sleeve (21). The plurality of annular outer cavities (207) are respectively distributed at intervals from a plurality of air guide pipes (205). The plurality of annular outer cavities (207) are coaxial with the annular inner cavity (202) and are located outside the annular inner cavity (202).

8. A high-voltage cable with a warning function according to claim 7, characterized in that: In one or two of the annular outer cavities (207) adjacent to the air guide pipe (205), the air guide pipe (205) communicates with the annular outer cavity (207) on the side close to the node ring (22).

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