High voltage cable with warning function

Abstract

The application relates to a high-voltage cable with an alarm function applied to the technical field of cable-related technologies. Through the arrangement of a self-induction channel, when not damaged, inert gas in the self-induction channel can improve the elasticity of the whole cable, thereby playing a buffering protection role on the cable. When damaged, the inert gas in the self-induction channel can exchange with air outside, on one hand, can trigger an audible and light alarm, so as to facilitate reminding workers to timely maintain, on the other hand, under the action of a one-way air closing piece, multiple alarm rings between the damage point and the node ring can be synchronously changed in color, which can not only expand the warning area, but also help maintenance personnel to quickly locate the damage point, improve the maintenance efficiency, and compared with the prior art, the cable can be warned and maintained before being completely broken down, thereby greatly reducing the safety hidden danger.

Description

TECHNICAL FIELD

[0001] The high-voltage cable relates to the technical field of cables, and particularly relates to a high-voltage cable with a warning function. BACKGROUND

[0002] The high-voltage cable is a kind of power cable, which is used for transmitting power between 1kv-1000kv, and is mainly used for power transmission and distribution. The components of the high-voltage cable from inside to outside include a conductor, insulation, an inner protective layer, a filler (armoring), and outer insulation.

[0003] When the cable load is high, the temperature of the wire core rises, the cable expands due to heat, and thus the cable is prone to breakdown. In addition, when the cable is exposed to the outside world, it is also prone to breakage due to accidental extrusion, friction, and dragging, and thus the cable is prone to breakdown. However, when the damage and breakdown occur, it is difficult to find out in time, and thus there is a great safety hazard when the power system continues to transmit power in this case.

[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 the adhesive, the damaged position can be found by maintenance personnel when the cable core body is working normally and there is a crack in the outside world, and the warning effect is achieved, which facilitates quick problem solving. However, this method mainly relies on manual inspection, and there is a possibility of missing detection when an anomaly occurs, which still has certain safety hazards.

[0005] The Chinese patent specification with the publication number CN119314738A discloses an automatic monitoring power cable. When the fog or rain in the environment enters the damaged part of the insulation layer, the spherical sponge absorbs water and expands, thereby protruding outward, so that the worker can accurately locate. Since the spherical sponge, the filling sponge, and the columnar sponge all have water absorption, water will be transferred to the bottom ring and the block, and thus the temperature of the bottom ring block at this position is lower than that of the bottom ring block at other insulation layer positions that are not aged or damaged, and thus the worker can know that this position is abnormal, and timely find out and repair the position, thereby avoiding further damage to the insulation layer, greatly improving the service life and safety during use of the power cable. However, the display of the damaged part relies on water from the outside world. On the one hand, it is greatly affected by the weather, and it is difficult to display the damaged point when it is not raining. In addition, when damaged, there is a risk of electric shock when water contacts it. This way of locating the damaged point has certain safety hazards.

[0006] Therefore, a high-voltage cable with a warning function is proposed, which does not need to rely on manual inspection, and can directly display the damaged point in a low safety hazard condition after damage. SUMMARY

[0007] In view of the prior art, the present application aims to solve the problem that the cable is prone to wear and breakdown, which is difficult to be found in time and poses a great safety hazard.

[0008] To solve the above problems, the present application provides a high-voltage cable with warning function, comprising a plurality of cable cores, the outer ends of the plurality of cable cores being wrapped with an insulation layer, the insulation layer being wrapped with an inner protective layer, the inner protective layer being wrapped with a plurality of warning protective sleeves fixedly connected along the axis of the inner protective layer, the warning protective sleeve comprising 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] The node ring is internally excavated with an accumulation cavity, the accumulation cavity is internally installed with an air sensor, the outer end of the node ring is fixedly installed with an audible and visual alarm, the audible and visual alarm is signal connected with the air sensor, the inner part of the outer protective sleeve is excavated with a self-induction channel, the inner wall of the warning ring is fixedly connected with an air guide pipe, the air guide pipe is fixedly penetrated through the outer end of the outer protective sleeve and communicated with the self-induction channel.

[0010] The self-induction channel comprises a plurality of annular cavities and a plurality of through cavity holes respectively located between adjacent two annular cavities, the plurality of through cavity holes are mutually spaced apart from the plurality of warning rings, the inner wall of the through cavity hole is fixedly connected with a one-way air closing piece, the node ring is further excavated with an air passage at the end facing the outer protective sleeve, the air passage is communicated with the annular cavity and the accumulation cavity, and the accumulation cavity and the plurality of annular cavities are all saturatedly filled with inert gas.

[0011] In the high-voltage cable with warning function, the inert gas in the self-induction channel can improve the elasticity of the whole cable when it is not damaged, thereby playing a buffering protection role for the cable, when it is damaged, the inert gas in the self-induction channel will exchange with the air outside, on the one hand, it can trigger the audible and visual alarm, so as to remind the staff to maintain in time, on the other hand, the warning ring at the damaged site will obviously change color, so that the maintenance personnel can 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 a polyphenol oxidase.

[0013] As a further improvement of the present application, the air guide pipe is communicated with the annular cavity, and the inner part of the warning ring is also saturatedly filled with inert gas.

[0014] As a further improvement of the present application, the one-way air closing piece comprises a positioning ring and a self-adapting piece fixedly connected to the end of the positioning ring close to the node ring, the self-adapting piece comprises two wall-adhering half-rings, a pre-bending section fixedly connected between the ends of the two wall-adhering half-rings, and a shielding piece fixedly connected to the inner wall of the wall-adhering half-ring and the pre-bending section, and the pre-bending section and the two pre-bending sections form a complete annular shape.

[0015] As a further improvement of the present application, the upper adherent half ring is fixedly connected with the positioning ring, and the lower adherent half ring is attached to the positioning ring but not fixed, and both of the adherent half rings are hard structures, the pre-bent section is an elastic structure, and the shielding piece is made of a sealed flexible material.

[0016] As a further improvement of the present application, the outer end of the node ring is further excavated with an indicating ring groove, and the indicating ring groove is mutually offset with the gathering cavity.

[0017] As a further improvement of the present application, the self-induction channel further comprises a plurality of annular outer cavities excavated in the inner part of the outer protective sleeve, the plurality of annular outer cavities are respectively and mutually spaced distributed with the plurality of air guide tubes, the plurality of annular outer cavities are coaxial with the annular inner cavity and located outside the annular inner cavity.

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

[0019] In summary, through the setting of the self-induction channel, when not damaged, the inert gas inside can improve the elasticity of the whole cable, thereby playing a buffering protection role on the cable, when damaged, the inert gas in the self-induction channel will exchange with the air outside, on one hand, it can trigger the sound and light alarm, which is convenient for reminding the staff to maintain in time, on the other hand, under the action of the one-way air closing piece, the plurality of warning rings between the damage point and the node ring can be synchronously changed in color, which can not only expand the warning area, but also help the maintenance personnel to quickly locate the damage point, improve the maintenance efficiency, and compared with the prior art, the cable can be warned and maintained before being completely broken down, thereby greatly reducing the safety hidden danger. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective view of the cable of the first embodiment of the present application;

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

[0022] Figure 3 It is a perspective view of the warning protective sleeve part of the first embodiment of the present application;

[0023] Figure 4 It is a half cut perspective view of the warning protective sleeve of the first embodiment of the present application;

[0024] Figure 5 It is Figure 4 It is a schematic view of A in FIG. 6;

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

[0026] Figure 7 The closed air side perspective view of the one-way closed air sheet of the first embodiment of the present application;

[0027] Figure 8 The perspective view of the one-way closed air sheet of the first embodiment of the present application when the closed air side is opened;

[0028] Figure 9 The perspective view of the one-way closed air sheet of the first embodiment of the present application when the ventilation side is opened;

[0029] Figure 10 The cross-sectional view of the warning protection sleeve when the cable is damaged in the first embodiment of the present application;

[0030] Figure 11 The perspective view of the cable after the cable is damaged in the first embodiment of the present application;

[0031] Figure 12 The horizontal cross-sectional view of the warning protection sleeve in the second embodiment of the present application;

[0032] Figure 13 The comparison view of the cable when the cable is damaged in the first embodiment and the second embodiment of the present application.

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

[0034] 11 cable core, 12 insulation layer, 13 inner protection layer, 21 outer protection sleeve, 22 node ring, 23 warning ring, 201 indicating ring groove, 202 annular inner cavity, 203 gathering cavity, 204 ventilation hole, 205 air guide tube, 206 through cavity hole, 207 annular outer cavity, 3 one-way closed air sheet, 31 positioning ring, 321 wall-adhering half ring, 322 pre-bending section, 323 shielding sheet, 4 air sensor, 5 sound-light alarm. DETAILED DESCRIPTION

[0035] The two embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0036] First embodiment:

[0037] Figures 1-2The utility model discloses a high voltage cable with warning function, including a plurality of cable core 11, a plurality of cable core 11 outer end is wrapped with insulating layer 12, insulating layer 12 outer is wrapped with inner protective layer 13, and inner protective layer 13 outer is wrapped with a plurality of warning protective sheath fixedly connected along the inner protective layer 13 axial sequence, wherein the length of one of warning protective sheath is no less than 2 meters, and the warning protective sheath includes outer protective sleeve 21, node ring 22 fixedly connected in the outer protective sleeve 21 end and a plurality of warning ring 23 fixedly connected in the outer protective sleeve 21 outer end, and the warning ring 23 is hollow transparent structure, and the warning ring 23 inner wall is coated with polyphenol oxidase, and the polyphenol oxidase is oxidized and discolored after meeting air, and the periphery of the cable is detected whether breakage occurs or not.

[0038] As Figures 3-5 , node ring 22 inside is carved with gathering cavity 203, and air sensor 4 is installed in gathering cavity 203, and audible -visual alarm 5 is fixedly installed in the outer end of node ring 22, and audible -visual alarm 5 is connected with air sensor 4 signal, and self-induction channel is carved in the inside of outer protective sleeve 21, and air pipe 205 is fixedly connected in the inner wall of warning ring 23, and air pipe 205 is fixedly penetrated through the outer end of outer protective sleeve 21 and is communicated with self-induction channel, when breakage occurs, and the crack depth reaches the self-induction channel, the amount of inert gas in the self-induction channel is gradually reduced, and the air content is gradually increased, so that air sensor 4 can trigger audible -visual alarm 5 after detecting the obvious change of air content, so that audible -visual alarm 5 carries out audible -visual alarm, and the breakage of the cable is found before being completely broken, and the security risk is effectively reduced.

[0039] As Figure 6 , the self-induction channel includes a plurality of annular cavities 202 and a plurality of through cavity holes 206 located between adjacent two annular cavities 202, the plurality of through cavity holes 206 are spaced apart from the plurality of warning rings 23, the through cavity hole 206 is fixedly connected with the one-way air closing piece 3, the node ring 22 is also carved with the air hole 204 towards the one end of the outer protective sleeve 21, the air hole 204 is communicated with the annular cavity 202 and the gathering cavity 203, the gathering cavity 203 and the plurality of annular cavities 202 are saturated filled with inert gas, the air pipe 205 is communicated with the annular cavity 202, and the inert gas is saturated filled in the inside of the warning ring 23, the inert gas can be used as a protective atmosphere, so that the polyphenol oxidase coated on the inner wall of the warning ring 23 is not easy to be oxidized under the condition of no breakage, only when the air seeps into the self-induction channel under the condition of breakage, the warning ring 23 will present the discoloration phenomenon, so that the false alarm condition is effectively reduced.

[0040] As Figure 7The one-way air-sealing plate 3 includes a positioning ring 31 and an adaptive plate fixedly connected to the end of the positioning ring 31 near the node ring 22, so that the gas can only move in the direction towards the side near the node ring 22 and cannot move in the opposite direction. The adaptive plate includes two wall-adhering semi-rings 321, a pre-bent section 322 fixedly connected between the ends of the two wall-adhering semi-rings 321, and a blocking plate 323 fixedly connected to the inner wall of the wall-adhering semi-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-adhering semi-ring 321 is fixedly connected to the positioning ring 31, and the lower wall-adhering semi-ring 321 is attached to the positioning ring 31 but not fixed. Both wall-adhering semi-rings 321 are rigid structures, the pre-bent section 322 is an elastic structure, and the blocking plate 323 is made of a sealing flexible material. Figures 8-9 When a break occurs, the gas moves along the direction closer to the node ring 22, pushing the shielding plate 323 and the lower wall-mounted semi-ring 321, and then into the collection chamber 203, where the air can 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-mounted semi-ring 321 also adheres to the positioning ring 31, keeping the entire one-way air-sealing plate 3 in a closed state, thereby preventing the gas from moving away from the node ring 22. As a result, only the warning ring 23 on the side of the break point closer to the node ring 22 will change color, making it easier to indicate the break point.

[0041] like Figure 10 When damage occurs, the depth of the damage reaches the annular inner cavity 202. As air seeps in, it passes through multiple annular inner cavities 202, through the cavity opening 206, and through the vent 204 to reach the collection cavity 203. This causes air to enter into multiple warning rings 23 between the damage point and the node ring 22, resulting in discoloration of the multiple warning rings 23. Due to the unidirectional passage of the one-way air-sealing plate 3, the multiple warning rings 23 in the opposite direction are difficult to discolor. When personnel arrive at the site for maintenance, if... Figure 11 First, identify the discolored area, then find the warning circle 23 that is furthest from node ring 22. The damage point is near it, which can effectively narrow down the range of the damage point, make it easier to identify the abnormal point, and improve maintenance efficiency.

[0042] The outer end of the node ring 22 is also chiseled with an indicator ring groove 201. The indicator ring groove 201 is offset from the collection cavity 203. The indicator ring groove 201 is used to indicate the cutting point of the cable when it needs to be cut, so as to cut the cable without destroying the internal self-inductance channel.

[0043] In summary, by setting the self-induction channel, when not damaged, the inert gas inside can improve the overall elasticity of the cable, thereby playing a buffering protection role for the cable. When damaged, the inert gas in the self-induction channel exchanges with the air outside. On the one hand, it can trigger the sound-light alarm 5, facilitating the timely maintenance of the staff. On the other hand, under the action of the one-way air-tight piece 3, the plurality of warning rings 23 between the damage point and the node ring 22 can be synchronized to change color, which can not only expand the warning area, but also help maintenance personnel quickly locate the damage point, improve maintenance efficiency, and compared with the prior art, the cable can be warned and maintained before it is completely broken, thereby greatly reducing the safety hazard.

[0044] Second embodiment:

[0045] The present embodiment adds an annular outer cavity 207 on the basis of the first embodiment, and the remaining parts remain the same as the first embodiment.

[0046] As Figure 12 The self-induction 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 spaced apart from each other and the plurality of gas guide pipes 205. The plurality of annular outer cavities 207 are coaxial with the annular inner cavity 202 and located outside the annular inner cavity 202. In one or two annular outer cavities 207 adjacent to the gas guide pipe 205, the gas guide pipe 205 and the annular outer cavity 207 close to the node ring 22 are in communication with each other.

[0047] As Figure 13 When damage from the outside occurs, the cracking path of the damage will first pass through the annular outer cavity 207. Since the plurality of annular outer cavities 207 are independent of each other, only the warning ring 23 in communication with them will change color at this time. Since the two annular inner walls of the annular outer cavity 207 are independent of each other, they can also effectively block the further cracking of the crack. At the same time, the color change can alert nearby inspectors. When the crack continues to crack further and extends to the annular inner cavity 202, it will exchange gas with the air outside, causing the air sensor 4 to sense the air and trigger the sound-light alarm 5. At this time, it can alert the staff. When the staff arrives at the scene, according to the color change of the warning ring 23, the range of the damage point can be directly determined and maintained, so that the cable can be maintained before it is completely broken, greatly reducing the safety hazard.

[0048] Compared with the first embodiment, the indication range of the damage point is smaller and the accuracy is higher. In specific implementation, appropriate embodiments can be selected according to actual needs.

[0049] The above-mentioned embodiments of the present application are combined with the current actual demand, the protection scope is not limited to this, various changes made within the knowledge range of the person skilled in the art without departing from the concept of the present application still fall within the protection scope of the present application.

Claims

1. A high voltage cable with a warning function, characterized in that: The cable includes a plurality of cable cores (11), outer ends of the plurality of cable cores (11) are wrapped with an insulation layer (12), the insulation layer (12) is wrapped with an inner protective layer (13), the inner protective layer (13) is wrapped with a plurality of warning protective sleeves which are fixedly connected along the axis of the inner protective layer (13) in sequence, the warning protective sleeve includes an outer protective sleeve (21), a node ring (22) fixedly connected at the end of the outer protective sleeve (21), and a plurality of warning rings (23) fixedly connected at the outer end of the outer protective sleeve (21); The node ring (22) is internally bored with an accumulation cavity (203), the accumulation cavity (203) is internally provided with an air sensor (4), the outer end of the node ring (22) is fixedly provided with a sound-light alarm (5), the sound-light alarm (5) is signal-connected with the air sensor (4), the inner part of the outer protective sleeve (21) is bored with a self-induction channel, the inner wall of the warning ring (23) is fixedly provided with an air guide pipe (205), the air guide pipe (205) is fixedly penetrated through the outer end of the outer protective sleeve (21) and is communicated with the self-induction channel; The self-induction channel includes a plurality of annular cavities (202) and a plurality of through cavity holes (206) respectively located between two adjacent annular cavities (202), the plurality of through cavity holes (206) are distributed at intervals with the plurality of warning rings (23), the inner wall of the through cavity hole (206) is fixedly provided with a one-way air closing piece (3), one end of the node ring (22) facing the outer protective sleeve (21) is also bored with an air passage (204), the air passage (204) is communicated with the annular cavity (202) and the accumulation cavity (203), and the accumulation cavity (203) and the plurality of annular cavities (202) are all saturatedly filled with inert gas.

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

3. A high voltage cable with a warning function according to claim 2, characterized in that: The air guide pipe (205) is communicated with the annular cavity (202), and the inner part of the warning ring (23) is also saturatedly filled with inert gas.

4. A high voltage cable with a warning function according to claim 1, characterized in that: The one-way air closing piece (3) includes a positioning ring (31) and a self-adapting piece fixedly connected at one end of the positioning ring (31) close to the node ring (22), the self-adapting piece includes two wall-adhering half-rings (321), a pre-bending section (322) fixedly connected between the ends of the two wall-adhering half-rings (321), and a shielding piece (323) fixedly connected to the inner wall of the wall-adhering half-ring (321) and the pre-bending section (322), and the pre-bending section (322) and the two pre-bending sections (322) form a complete annular shape.

5. A high voltage cable with a warning function according to claim 4, characterized in that: The wall-adhering half-ring (321) on the upper side is fixedly connected with the positioning ring (31), the wall-adhering half-ring (321) on the lower side is attached to the positioning ring (31) but not fixed, and the two wall-adhering half-rings (321) are both hard structures, the pre-bending section (322) is an elastic structure, and the shielding piece (323) is made of a sealing flexible material.

6. A high voltage cable with a warning function according to claim 1, characterized in that: The outer end of the node ring (22) is also bored with an indicating ring groove (201), and the indicating ring groove (201) is mutually misaligned with the accumulation cavity (203).

7. A high voltage cable with warning function according to claim 2, characterized in that: The self-induction channel further comprises a plurality of annular outer cavities (207) formed in the outer protective sleeve (21), the plurality of annular outer cavities (207) are respectively and mutually spaced apart from the plurality of gas guide tubes (205), the plurality of annular outer cavities (207) are coaxial with the annular inner cavity (202) and 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 annular outer cavities (207) adjacent to the gas guide tube (205), the gas guide tube (205) and the annular outer cavity (207) near the node ring (22) side are in communication with each other.

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