Reinforced overhead insulated power cable

Abstract

The application discloses a reinforced overhead insulated power cable applied to the field of power cables, which increases the resistance when the cable moves forward and backward through the telescopic damping ring between the movable sleeve and the fixed sleeve, the fixed loose seat and the movable loose seat, thereby effectively improving the tensile strength of the cable; when the cable swings in strong wind weather, the friction between the fixed loose seat and the movable loose seat and the elasticity of the telescopic damping ring are utilized to absorb the pulling force suffered by the cable, so that the moving amount of the cable is weakened, thereby effectively preventing the cable from being mechanically damaged under repeated pulling, and the displacement amount of the cable is monitored through the array type photosensitive sensor; in the icing condition of the cable, the loose amount of the movable sleeve and the fixed sleeve can be actively strengthened and limited, so that the cable is prevented from falling unlimitedly under the icing condition and causing breakage, and meanwhile, the resistance between the movable sleeve and the fixed sleeve can be dynamically adjusted through the monitoring of the frequency and amplitude of the displacement amount change, so that the adjustment capability of the cable in response to the change load such as strong wind and icing is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of power cables, and particularly to a reinforced overhead insulated power cable. Background Technology

[0002] High-voltage overhead cables are a type of power transmission method that falls between traditional overhead conductors and underground cables. They are mainly used to safely and reliably transmit electrical energy on overhead towers. During installation, overhead cables are connected to the towers via fittings and insulators. The connection points between the cable and the fittings bear significant forces, therefore the overhead cable must be strong enough at these points to ensure that it is not damaged by long-term wear and tensile forces.

[0003] In the prior art, such as the high-strength reinforced core composite overhead cable with publication number CN209000585U and the reinforced conductor overhead cable with publication number CN215834309U, both disclose reinforced overhead insulated cables.

[0004] However, existing reinforced overhead cables mainly focus on the internal structure of the cable to enhance its overall strength. This significantly increases the difficulty and cost of cable production. Moreover, even with additional reinforcing structures added to the cable, they only provide passive reinforcement and cannot dynamically adjust to changes in external loads when facing complex environments such as strong winds and heavy icing, resulting in limited tensile strength. Summary of the Invention

[0005] The core of this invention lies in dynamically adjusting reinforcement methods by sensing changes in cable load, thus solving the problem of poor adaptability in existing passive reinforcement technologies. Simultaneously, it can actively protect the cable under immense tensile load, effectively preventing cable damage.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A reinforced overhead insulated power cable includes an overhead cable body, a movable sleeve fixedly fitted on the outside of the overhead cable body, a fixed sleeve fitted on the outside of the movable sleeve, and a telescopic damping ring fixedly connected between the movable sleeve and the fixed sleeve. Fixed misaligned seats are fixedly connected to the inner walls of both ends of the fixed sleeve, and a movable misaligned seat that rubs against the fixed misaligned seat is fixedly connected to the outer wall of the movable sleeve. An annular groove is opened on the side wall of the fixed misaligned seat facing the movable misaligned seat, and a slip ring that slides in the annular groove is fixedly connected to the middle of the upper end of the movable misaligned seat. Rebound bands are fixedly connected between the two side walls of the slip ring and the two side walls of the annular groove.

[0008] A laser emitter is fixedly connected to the inner wall of the fixed sleeve, and an array-type photosensitive sensor matching the laser emitter is installed on the outer wall of the moving sleeve facing the laser emitter. The array-type photosensitive sensor is connected to a wind-resistant module and an icing protection module, and the array-type photosensitive sensor is connected to the background alarm device via a remote transmission device.

[0009] Furthermore, the telescopic damping ring includes a corrugated ring body, and the inner wall of the corrugated ring body is fixedly inlaid with multiple elastic tensile bands distributed at equal intervals.

[0010] Furthermore, the inner wall of the annular groove directly opposite the fixed moving seat is also fixedly inlaid with a magnetic damping component that magnetically attracts the slip ring, and the outer surface of the magnetic damping component is fixedly connected with an anti-wear pad that contacts the slip ring.

[0011] Preferably, the magnetic damping component is composed of multiple magnetic rings of equal length, and the strength of the multiple magnetic rings increases sequentially from the middle of the fixed-displacement seat to both sides.

[0012] Preferably, the inner wall of the moving sleeve is provided with an annular cavity, the inner wall of the annular cavity is fixedly connected to a squeezing membrane, and an electromagnetic seat that magnetically repels the squeezing membrane is installed near the inner wall of the moving sleeve. The squeezing membrane and the inner wall of the annular cavity are filled with a blocking liquid. The rebound band is connected to the inside of the annular cavity through a slip ring. The wind-resistant module is signal-connected to the electromagnetic seat through a microcontroller.

[0013] Furthermore, the extrusion membrane includes elastic membranes on both sides, and a magnetic membrane is fixedly connected between the two elastic membranes.

[0014] Preferably, the inner wall of the slip ring has multiple T-shaped liquid passages that are equally spaced and distributed around the slip ring and communicate with the rebound bands on both sides. The T-shaped liquid passages are slidably connected to the inner wall of the annular cavity with a plug. The plug is fixedly connected to the side wall away from the annular cavity with a support rod. The inner wall of the slip ring has a telescopic cavity that matches the support rod. A compression spring is fixedly connected between the support rod and the inner wall of the telescopic cavity.

[0015] Preferably, two symmetrically distributed misalignment limiting rings are fixedly connected between the moving sleeve and the fixed sleeve, and the misalignment limiting rings are located between the telescopic damping ring and the fixed misalignment seat. The misalignment limiting ring includes an elastic base ring, and an electrostrictive strip that is signal-connected to the icing protection module is fixedly embedded in the middle of the elastic base ring. Multiple symmetrically distributed liquid storage cavities are opened on the inner wall of the elastic base ring outside the electrostrictive strip, and each liquid storage cavity is filled with electrorheological fluid that is signal-connected to the icing protection module.

[0016] Compared with the prior art, the advantages of this invention are:

[0017] (1) This solution increases the resistance of the cable when it moves back and forth by adding a moving sleeve and a fixed sleeve between the cable and the fittings, and by using the telescopic damping ring, the fixed misaligned moving seat and the moving misaligned moving seat between the moving sleeve and the fixed sleeve. This effectively improves the tensile strength of the cable. When the cable sways in strong winds, the friction between the fixed misaligned moving seat and the moving misaligned moving seat and the elasticity of the telescopic damping ring are used to absorb the pulling force on the cable, thereby reducing the amount of cable movement. This effectively prevents the cable from being mechanically damaged under repeated pulling, and also effectively reduces the wear between the cable and the fittings.

[0018] (2) The displacement of the cable is also monitored by an array of photosensitive sensors. In the case of cable icing, the displacement of the moving sleeve and the fixed sleeve can be actively restricted to prevent the cable from falling without limit and causing breakage. At the same time, the resistance between the moving sleeve and the fixed sleeve can be dynamically adjusted by monitoring the frequency and amplitude of displacement changes, which can effectively improve the cable's ability to cope with changes in loads such as strong winds and icing. Attached Figure Description

[0019] Figure 1 This is a perspective view of the moving sleeve and the fixed sleeve of the present invention before misalignment;

[0020] Figure 2 This is a perspective view of the moving sleeve and the fixed sleeve of the present invention when they are misaligned;

[0021] Figure 3 This is a side cross-sectional view of the moving sleeve and the fixed sleeve of the present invention before misalignment;

[0022] Figure 4 This is a side cross-sectional view of the moving sleeve and the fixed sleeve of the present invention when they are misaligned;

[0023] Figure 5 This is a side cross-sectional view of the fixed misaligned seat and the movable misaligned seat of the present invention before misalignment;

[0024] Figure 6 This is a side cross-sectional view of the fixed misaligned moving seat and the movable misaligned moving seat of the present invention during misalignment;

[0025] Figure 7 This is a side cross-sectional view of the slip ring of the present invention;

[0026] Figure 8 This is a side cross-sectional view of the slip restriction ring of the present invention;

[0027] Figure 9 This is a partial side cross-sectional view of the telescopic damping ring of the present invention.

[0028] Explanation of the labels in the diagram:

[0029] 1. Overhead cable body; 2. Moving sleeve; 3. Fixed sleeve; 4. Telescopic damping ring; 401. Corrugated ring body; 402. Elastic tensile band; 5. Fixed misalignment seat; 501. Annular slide groove; 6. Moving misalignment seat; 601. Annular cavity; 7. Slip ring; 701. T-channel liquid cavity; 702. Telescopic cavity; 8. Rebound band; 9. Magnetic damping component; 901. Anti-wear pad; 10. Laser emitter; 11. Array photosensitive sensor; 12. Squeezing film; 1201. Elastic film; 1202. Magnetic film; 13. Electromagnetic seat; 14. Restricting fluid; 15. Misalignment limiting ring; 1501. Elastic matrix ring; 1502. Electrostrictive band; 1503. Electrorheological fluid; 16. Support rod; 17. Liquid plug. Detailed Implementation

[0030] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0031] First implementation method:

[0032] Please see Figure 1 , Figure 2 , Figure 5 A reinforced overhead insulated power cable includes an overhead cable body 1. A movable sleeve 2 is fixedly sleeved on the outside of the overhead cable body 1, and a fixed sleeve 3 is fixedly sleeved on the outside of the movable sleeve 2. A telescopic damping ring 4 is fixedly connected between the movable sleeve 2 and the fixed sleeve 3. Fixed misaligned moving seats 5 are fixedly connected to the inner walls of both ends of the fixed sleeve 3. A movable misaligned moving seat 6, which rubs against the fixed misaligned moving seat 5, is fixedly connected to the outer wall of the movable sleeve 2. An annular groove 501 is formed on the side wall of the fixed misaligned moving seat 5 opposite to the movable misaligned moving seat 6. A slip ring 7, which slides through the annular groove 501, is fixedly connected to the middle of the upper end of the movable misaligned moving seat 6. Rebound bands 8 are fixedly connected between the two side walls of the slip ring 7 and the two end side walls of the annular groove 501. The fixed sleeve 3 and the insulator are connected by metal... With the connection, when the overhead cable body 1 sways and shakes in strong winds, the moving sleeve 2 moves back and forth relative to the fixed sleeve 3 under the drive of the overhead cable body 1, thereby causing the moving misalignment seat 6 and the fixed misalignment seat 5 to slide out of alignment. At this time, the elastic damping force of the telescopic damping ring 4, the rebound force of the rebound band 8, and the friction between the slip ring 7 and the annular groove 501 are used to increase the resistance when the overhead cable body 1 moves back and forth, thereby effectively preventing the overhead cable body 1 from being damaged by huge tensile forces in strong winds. At the same time, it can also effectively reduce the swaying of the overhead cable body 1. Compared with the existing technology of direct connection between the cable and the hardware, it can effectively reduce the wear between the overhead cable body 1 and the hardware.

[0033] Please see Figure 3 , Figure 4A laser emitter 10 (specific model selected according to actual needs) is fixedly connected to the inner wall of the fixed sleeve 3. An array-type photosensitive sensor 11 (specific model selected according to actual needs) matching the laser emitter 10 is installed on the outer wall of the movable sleeve 2, directly opposite the laser emitter 10. The array-type photosensitive sensor 11 is connected to a wind-resistant module and an icing protection module. The array-type photosensitive sensor 11 is also connected to a background alarm device via a remote transmission device (the specific connection device and working principle are well-known technologies in the relevant field and will not be described in detail here). The array-type photosensitive sensor 11 receives the light signal emitted by the laser emitter 10. When the movable sleeve 2 extends and retracts inside the fixed sleeve 3, the laser emitter 10 emits... The point of impact of the emitted light on the array-type photosensitive sensor 11 changes. The array-type photosensitive sensor 11 can know the displacement of the overhead cable body 1 by detecting the position difference of the light signal before and after. At the same time, it can also know the frequency of the movement of the overhead cable body 1 before and after according to the speed of change. If the position change of the light signal detected by the array-type photosensitive sensor 11 is fast, it indicates that the overhead cable body 1 is in a strong wind environment, triggering the wind resistance module. If the position difference of the light signal detected by the array-type photosensitive sensor 11 is large and the difference remains unchanged, it indicates that the overhead cable body 1 is in an icing state, triggering the icing protection module. When the position difference reaches the danger threshold, the alarm device in the background is immediately triggered to remind the inspection personnel to take timely measures.

[0034] Please see Figure 9 The telescopic damping ring 4 includes a corrugated ring body 401 (preferably made of insulating rubber, but other elastic materials can be selected according to actual needs), and multiple equally spaced elastic tensile bands 402 (preferably made of polyurethane elastic material, but other elastic materials can be selected according to actual needs) are fixedly embedded in the inner wall of the corrugated ring body 401. When the moving sleeve 2 moves telescopically inside the fixed sleeve 3, the corrugated ring body 401 uses its own elasticity to provide damping force when the moving sleeve 2 moves. At the same time, the elastic tensile bands 402 can also enhance the tensile performance of the corrugated ring body 401, thereby effectively reducing the movement amplitude of the overhead cable body 1 under strong wind conditions.

[0035] Please see Figure 6 The inner wall of the annular groove 501 opposite the fixed moving seat 5 is also fixedly embedded with a magnetic damping element 9 that magnetically attracts the slip ring 7, and the outer surface of the magnetic damping element 9 is fixedly connected with an anti-wear pad 901 (made of wear-resistant material) that contacts the slip ring 7. When the moving moving seat 6 moves relative to the fixed moving seat 5, the slip ring 7 slides along the annular groove 501. In the process of sliding, in addition to the rebound force of the rebound band 8, the slip ring 7 is also subjected to the magnetic attraction force of the magnetic damping element 9. Therefore, the magnetic damping element 9 provides an additional restraining force for the slip ring 7, thereby effectively strengthening the tensile performance of the overhead cable body 1.

[0036] Please see Figure 6 The magnetic damping component 9 is composed of multiple magnetic rings of equal length, and the strength of the multiple magnetic rings increases sequentially from the middle of the fixed moving seat 5 to both sides. This arrangement allows the magnetic damping component 9 to have a magnetic intensity gradient. The farther the slip ring 7 slides, the stronger the magnetic attraction force it receives, thereby effectively strengthening the tensile strength of the overhead cable body 1.

[0037] This embodiment adds a movable sleeve 2 and a fixed sleeve 3 between the cable and the fittings. The telescopic damping ring 4, the fixed misaligned moving seat 5, and the movable misaligned moving seat 6 between the movable sleeve 2 and the fixed sleeve 3 increase the resistance when the cable moves back and forth, thereby effectively improving the tensile strength of the cable. When the cable sways in strong winds, the friction between the fixed misaligned moving seat 5 and the movable misaligned moving seat 6 and the elasticity of the telescopic damping ring 4 are used to absorb the pulling force on the cable, thereby reducing the amount of cable movement. This effectively prevents the cable from being mechanically damaged under repeated pulling and also effectively reduces the wear between the cable and the fittings.

[0038] Second implementation method:

[0039] Based on the first embodiment, the tensile performance of the overhead cable body 1 under icing conditions is enhanced by dynamically adjusting the damping force, while the rest remains consistent with the first embodiment.

[0040] Please see Figure 5 , Figure 6 The inner wall of the moving sleeve 6 has an annular cavity 601. A squeezing membrane 12 is fixedly connected to the inner wall of the annular cavity 601. An electromagnetic seat 13, which magnetically repels the squeezing membrane 12, is installed near the inner wall of the moving sleeve 2 in the annular cavity 601. The space between the squeezing membrane 12 and the inner wall of the annular cavity 601 is filled with a retardant liquid 14 (preferably a non-Newtonian fluid, but other liquids with high viscosity can be selected according to actual needs). The rebound band 8 is connected to the interior of the annular cavity 601 through a slip ring 7. The wind-resistant module is signal-connected to the electromagnetic seat 13 through a microcontroller. The squeezing membrane 12 includes elastic membranes 1201 on both sides (preferably made of rubber, but other elastic materials can be selected according to actual needs). A magnetic membrane 1202 is fixedly connected between the membranes 1201. When the array photosensitive sensor 11 determines that the overhead cable body 1 is in a strong wind state according to the detection value, the wind-resistant module activates the electromagnetic base 13. The electromagnetic base 13 generates a magnetic force that repels the magnetic membrane 1202. After being repelled, the magnetic membrane 1202 squeezes the blocking liquid 14 into the rebound band 8. When the overhead cable body 1 sways due to the strong wind, the slip ring 7 slides repeatedly in the annular groove 501. The blocking liquid 14 can effectively reduce the movement frequency of the slip ring 7 by relying on its own viscous resistance, thereby providing a buffer force for the slip ring 7, and thus playing a buffering role for the overhead cable body 1, effectively preventing the overhead cable body 1 from being damaged under frequent pulling.

[0041] Please see Figure 7 The inner wall of the slip ring 7 has multiple T-channels 701 that are equally spaced and distributed around the slip ring and communicate with the rebound bands 8 on both sides. The T-channels 701 are slidably connected to the inner wall of the annular cavity 601 with a plug 17. The side wall of the plug 17 away from the annular cavity 601 is fixedly connected to a support rod 16. The inner wall of the slip ring 7 has a telescopic cavity 702 that matches the support rod 16. A compression spring is fixedly connected between the support rod 16 and the inner wall of the telescopic cavity 702. In the initial state, the plug 17 blocks the inlet of the T-channel 701 under the rebound of the compression spring. When the magnetic membrane 1202 squeezes the blocking liquid 14 under the repulsion, the plug 17 is pushed open by the blocking liquid 14, so that the blocking liquid 14 flows through the T-channels 701 into the interior of the rebound bands 8 on both sides.

[0042] Please see Figure 8 Two symmetrically distributed misalignment limiting rings 15 are fixedly connected between the moving sleeve 2 and the fixed sleeve 3. The misalignment limiting rings 15 are located between the telescopic damping ring 4 and the fixed misalignment seat 5. The misalignment limiting rings 15 include an elastic base ring 1501 (preferably made of polyurethane elastic material, but other elastic materials can be selected according to actual needs). An electrostrictive strip 1502 connected to the icing protection module is fixedly embedded in the middle of the elastic base ring 1501. Multiple symmetrically distributed liquid storage cavities are opened on the inner wall of the elastic base ring 1501 outside the electrostrictive strip 1502, and each liquid storage cavity is filled with an electrorheological fluid 1503 connected to the icing protection module. When the moving sleeve 2 and the fixed sleeve 3 misalign, the misalignment limiting rings 15... When stretched, the elastic matrix ring 1501 provides additional tensile strength to the overhead cable body 1 using its own elasticity. When the array photosensitive sensor 11 determines that the overhead cable body 1 is in a strong wind state based on the detection value, the icing protection module activates the electrostrictive belt 1502. After being energized, the electrostrictive belt 1502 shortens and deforms. In this way, after the slip restriction ring 15 is stretched, the shortened electrostrictive belt 1502 can strengthen the resistance strength of the slip restriction ring 15. At the same time, the icing protection module also activates the electrorheological fluid 1503. The electrorheological fluid 1503 changes from liquid to solid, increasing the overall stiffness of the slip restriction ring 15. Together with the electrostrictive belt 1502, they further strengthen the tensile strength of the overhead cable body 1.

[0043] This embodiment also uses an array of photosensitive sensors 11 to monitor the displacement of the cable. In the case of cable icing, it can actively restrict the misalignment of the moving sleeve 2 and the fixed sleeve 3 to prevent the cable from falling without restraint and causing breakage. At the same time, it can also dynamically adjust the resistance between the moving sleeve 2 and the fixed sleeve 3 by monitoring the frequency and amplitude of displacement changes, effectively improving the cable's ability to adjust to changing loads such as strong winds and icing.

[0044] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A reinforced overhead insulated power cable, comprising an overhead cable body (1), characterized in that: The overhead cable body (1) is fixedly fitted with a movable sleeve (2), and the movable sleeve (2) is fitted with a fixed sleeve (3). A telescopic damping ring (4) is fixedly connected between the movable sleeve (2) and the fixed sleeve (3). Fixed misaligned moving seats (5) are fixedly connected to the inner walls of both ends of the fixed sleeve (3). A moving misaligned moving seat (6) that rubs against the fixed misaligned moving seat (5) is fixedly connected to the outer wall of the movable sleeve (2). An annular groove (501) is provided on the side wall of the fixed misaligned moving seat (5) facing the moving misaligned moving seat (6). A slip ring (7) that slides in the annular groove (501) is fixedly connected to the middle of the upper end of the moving misaligned moving seat (6). A rebound band (8) is fixedly connected between the two side walls of the slip ring (7) and the two side walls of the annular groove (501). A laser emitter (10) is fixedly connected to the inner wall of the middle part of the fixed sleeve (3), and an array-type photosensitive sensor (11) matching the laser emitter (10) is installed on the outer wall of the movable sleeve (2) facing the laser emitter (10). The array-type photosensitive sensor (11) is connected to a wind-resistant module and an ice-covering protection module, and the array-type photosensitive sensor (11) is connected to the background alarm device through a remote transmission device.

2. The reinforced overhead insulated power cable according to claim 1, characterized in that: The telescopic damping ring (4) includes a corrugated ring body (401), and the inner wall of the corrugated ring body (401) is fixedly inlaid with a plurality of elastic tensile bands (402) distributed at equal intervals.

3. The reinforced overhead insulated power cable according to claim 1, characterized in that: The inner wall of the fixed moving seat (5) facing the annular slide groove (501) is also fixedly inlaid with a magnetic damping component (9) that magnetically attracts the slide ring (7), and the outer surface of the magnetic damping component (9) is fixedly connected with an anti-wear pad (901) that contacts the slide ring (7).

4. A reinforced overhead insulated power cable according to claim 3, characterized in that: The magnetic damping component (9) is composed of multiple magnetic rings of equal length, and the strength of the multiple magnetic rings increases sequentially from the middle of the fixed moving seat (5) to both sides.

5. A reinforced overhead insulated power cable according to claim 1, characterized in that: The inner wall of the moving seat (6) is provided with an annular cavity (601). The inner wall of the annular cavity (601) is fixedly connected to a squeezing membrane (12). An electromagnetic seat (13) that magnetically repels the squeezing membrane (12) is installed on the inner wall of the annular cavity (601) near the moving sleeve (2). The squeezing membrane (12) and the inner wall of the annular cavity (601) are filled with a blocking liquid (14). The rebound band (8) is connected to the inside of the annular cavity (601) through a slip ring (7). The wind-resistant module is connected to the electromagnetic seat (13) through a microcontroller.

6. A reinforced overhead insulated power cable according to claim 5, characterized in that: The extrusion membrane (12) includes elastic membranes (1201) on both sides, and a magnetic membrane (1202) is fixedly connected between the two elastic membranes (1201).

7. A reinforced overhead insulated power cable according to claim 1, characterized in that: The inner wall of the slip ring (7) has multiple T-channels (701) that are equally spaced and distributed around the slip ring and communicate with the rebound bands (8) on both sides. The T-channels (701) are slidably connected to the inner wall of the annular cavity (601) with a plug (17). The plug (17) is fixedly connected to the side wall away from the annular cavity (601) with a support rod (16). The inner wall of the slip ring (7) has a telescopic cavity (702) that matches the support rod (16). A compression spring is fixedly connected between the support rod (16) and the inner wall of the telescopic cavity (702).

8. A reinforced overhead insulated power cable according to claim 1, characterized in that: Two symmetrically distributed misalignment limiting rings (15) are fixedly connected between the moving sleeve (2) and the fixed sleeve (3), and the misalignment limiting ring (15) is located between the telescopic damping ring (4) and the fixed misalignment seat (5). The misalignment limiting ring (15) includes an elastic base ring (1501). An electrostrictive strip (1502) connected to the icing protection module is fixedly embedded in the middle of the elastic base ring (1501). Multiple symmetrically distributed liquid storage cavities are opened on the inner wall of the elastic base ring (1501) outside the electrostrictive strip (1502), and each liquid storage cavity is filled with electrorheological fluid (1503) connected to the icing protection module.

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