10kv overhead insulated cable with eccentricity correction structure

Abstract

The utility model discloses a kind of 10KV overhead insulated cable with eccentricity correction structure, it includes conductor core, insulating layer, sheath layer and eccentricity correction component and adjusting ring.Eccentricity correction component is positioned to the center of conductor core by elastic support and correction block, adjusting ring is realized the radial movement of correction block by rack, sliding block and rotating gear.This application can efficiently automatically correct conductor core eccentricity problem, optimize cable electrical performance, prolong service life, reduce construction and maintenance difficulty simultaneously, improve operation reliability and stability.

Description

Technical Field

[0001] This utility model relates to the field of power transmission technology, and in particular to a 10KV overhead insulated cable with an eccentric correction structure. Background Technology

[0002] Cables are essential carriers of electricity and are widely used in power systems. They come in various structural forms and performance characteristics depending on the voltage level and operating environment. A 10kV overhead insulated cable is a specialized cable used in medium-voltage distribution networks, primarily responsible for transmitting electrical energy. Its outer layer is typically wrapped with insulating material to ensure operational safety and adaptability to outdoor environments. In practical applications, due to manufacturing processes or mechanical stress during long-term operation, cable eccentricity may occur, leading to uneven insulation thickness, which in turn affects electrical performance and service life.

[0003] Currently, some cable designs incorporate correction structures to mitigate eccentricity issues. However, these structures often rely on complex adjustment devices or additional installation steps. For example, some solutions involve adding external supports or using special molds for correction. While these methods can alleviate eccentricity to some extent, they require high installation precision and may increase construction difficulty and maintenance costs.

[0004] However, in the process of conceiving and implementing the above application, the inventors found that the correction structure in the prior art often relies on external equipment or manual intervention in practical applications, making it difficult to achieve efficient and automated eccentricity correction function, and may affect the overall effect due to improper operation. Utility Model Content

[0005] The purpose of this utility model is to provide a 10KV overhead insulated cable with an eccentric correction structure, which solves the problems mentioned in the background art.

[0006] This utility model is implemented as follows: a 10KV overhead insulated cable with an eccentric correction structure includes a conductor core, an insulation layer wrapped around the outside of the conductor core, and a sheath layer disposed outside the insulation layer. The cable also includes: An eccentricity correction assembly includes multiple correction blocks symmetrically distributed around the outer periphery of a conductor core. Each correction block has an elastic support between its inner sidewall and the conductor core, and its outer sidewall is in contact with the inner surface of the insulating layer. An adjusting ring is sleeved on the outside of the insulating layer and slidably connected to the inner wall of the sheath layer. Multiple guide grooves are provided on the inner side wall of the adjusting ring, and a sliding block is provided in each guide groove. One end of the sliding block extends out of the guide groove and is fixedly connected to the outer side wall of the correction block. The adjusting ring has at least one set of drive racks on its outer side wall. The drive racks mesh with a rotating gear. The rotating gear is rotatably connected to the outer side wall of the sheath layer through a rotating shaft. One end of the rotating shaft extends to the outside of the sheath layer and is connected to a knob.

[0007] Optionally, the inner wall of the correction block is provided with an arc-shaped groove, the radius of curvature of the arc-shaped groove is matched with the outer diameter of the conductor core, and a flexible pad is embedded on the inner surface of the arc-shaped groove.

[0008] Optionally, the elastic support is a spring column, with its two ends fixed to the inner wall of the correction block and the outer wall of the conductor core by threaded connection, and the axial direction of the spring column is consistent with the radial direction of the conductor core.

[0009] Optionally, the sliding block has a T-shaped cross-section, and the portion of it located in the guide groove is provided with balls. The balls roll in contact with the inner wall of the guide groove to reduce sliding resistance.

[0010] Optionally, the outer wall of the adjusting ring is further provided with a positioning hole, in which a positioning pin is inserted. The other end of the positioning pin is threaded to the inner wall of the sheath layer to restrict the axial movement of the adjusting ring.

[0011] Optionally, the ratio of the number of teeth of the rotating gear to the number of teeth of the driving rack is 2:1, and both sides of the rotating gear are provided with thrust bearings. The outer ring of the thrust bearing is fixedly connected to the inner wall of the sheath layer, and the inner ring is fixedly connected to the outer wall of the rotating shaft.

[0012] Optionally, the outer wall of the knob is provided with anti-slip texture, and a through hole is provided at the center of the knob. A locking rod is inserted into the through hole, and one end of the locking rod is threaded to the outer wall of the sheath layer to fix the position of the knob.

[0013] Optionally, the inner wall of the sheath layer is provided with a plurality of limiting grooves, which extend along the axial direction of the sheath layer, and the outer wall of the adjusting ring is provided with a plurality of limiting blocks, which are slidably connected to the limiting grooves to prevent the adjusting ring from rotating circumferentially.

[0014] Optionally, the inner surface of the insulating layer is provided with a plurality of uniformly distributed protrusions, the top of the protrusions contacting the outer wall of the correction block, and the height of the protrusions being less than the thickness of the correction block.

[0015] Optionally, the flexible pad is made of silicone material with a thickness of 1mm to 3mm, and the outer surface of the flexible pad has a microporous structure to enhance friction.

[0016] The beneficial effects of this utility model are as follows: This utility model uses a rotating knob to drive a rotating shaft, which in turn causes a rotating gear to drive a rack, thereby pushing a sliding block along a guide groove. The sliding block then moves a correction block closer to the center of the conductor core, thus achieving eccentric correction of the conductor core. The inner wall of the correction block is provided with an arc-shaped groove and a flexible pad. The arc-shaped groove conforms to the outer surface of the conductor core, while the flexible pad provides cushioning and protection, preventing damage to the conductor core. The design of the elastic support allows the correction block to be freely adjusted within a certain range to accommodate conductor cores of different diameters, while ensuring stability during the correction process. The outer wall of the adjusting ring is provided with a positioning hole and a positioning pin. The positioning pin is threaded to the inner wall of the sheath layer, effectively limiting the axial movement of the adjusting ring and ensuring the accuracy of the correction process. The gear ratio design of the rotating gear and the driving rack optimizes transmission efficiency, while the thrust bearing reduces frictional loss during rotation. The anti-slip texture on the outer wall of the knob enhances the ease of operation, and the locking lever design further improves the reliability of the device. The limiting groove on the inner wall of the sheath layer cooperates with the limiting block on the outer wall of the adjusting ring to prevent the adjusting ring from rotating circumferentially, ensuring the stability of the calibration process. The protrusions on the inner surface of the insulation layer contact the outer wall of the calibration block, which can evenly distribute pressure and avoid local stress concentration. The microporous structure of the flexible gasket not only enhances friction but also has a certain shock absorption effect, further improving the calibration effect. In summary, this utility model, through the above structural design, achieves a highly efficient and automated eccentricity calibration function, significantly improving the electrical performance and service life of the cable, while reducing construction difficulty and maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention, showing the distribution of the cable's conductor core, insulation layer, sheath layer, and eccentricity correction component.

[0018] Figure 2 This is a magnified view of a portion of the eccentricity correction assembly, showing in detail the working relationship between the correction block, the elastic support, the adjusting ring, and the sliding block.

[0019] Figure 3 The diagram shows the connection between the adjusting ring, the drive rack, and the rotating gear, highlighting the arrangement of the knob, the shaft, and the locking lever.

[0020] The reference numerals in the attached diagram are as follows: 1. Conductor core; 2. Insulation layer; 3. Sheath layer; 4. Correction block; 5. Elastic support; 6. Adjustment ring; 7. Sliding block; 8. Drive rack; 9. Rotary gear; 10. Knob; 11. Locking rod; 12. Positioning pin; 13. Limiting groove; 14. Limiting block; 15. Protrusion. Detailed Implementation

[0021] like Figures 1 to 3The present invention discloses a 10kV overhead insulated cable with an eccentric correction structure. The overall structure includes a conductor core 1, an insulation layer 2 wrapped around the conductor core 1, and a sheath layer 3 disposed outside the insulation layer 2. An eccentric correction assembly is provided between the conductor core 1 and the insulation layer 2. This assembly consists of multiple correction blocks 4 symmetrically distributed around the outer periphery of the conductor core 1. The inner wall of each correction block 4 is connected to the conductor core 1 via an elastic support 5, and the outer wall of the correction block 4 contacts the inner surface of the insulation layer 2. An adjusting ring 6 is sleeved on the outer side of the insulation layer 2 and slidably connected to the inner wall of the sheath layer 3. Multiple guide grooves are provided on the inner wall of the adjusting ring 6, and a sliding block 7 is provided in each guide groove. One end of the sliding block 7 extends out of the guide groove and is fixedly connected to the outer wall of the correction block 4. At least one set of driving racks 8 is provided on the outer wall of the adjusting ring 6. The driving racks 8 mesh with a rotating gear 9. The rotating gear 9 is rotatably connected to the outer wall of the sheath layer 3 via a rotating shaft. One end of the rotating shaft extends to the outside of the sheath layer 3 and is connected to a knob 10.

[0022] The inner wall of the correction block 4 has an arc-shaped groove, the radius of curvature of which matches the outer diameter of the conductor core 1. A flexible gasket, made of silicone material with a thickness of 1mm to 3mm, is embedded on the inner surface of the arc-shaped groove, and its outer surface has a microporous structure. The elastic support 5 is a spring column, with both ends fixed to the inner wall of the correction block 4 and the outer wall of the conductor core 1 by threaded connections. The axial direction of the spring column is consistent with the radial direction of the conductor core 1. The sliding block 7 has a T-shaped cross-section, with balls located in the guide groove. The balls roll in contact with the inner wall of the guide groove to reduce sliding resistance. The outer wall of the adjusting ring 6 also has a positioning hole, into which a positioning pin 12 is inserted. The other end of the positioning pin 12 is threaded to the inner wall of the sheath layer 3 to limit the axial movement of the adjusting ring 6. The ratio of the number of teeth of the rotating gear 9 to the number of teeth of the driving rack 8 is 2:1. Thrust bearings are provided on both sides of the rotating gear 9. The outer ring of the thrust bearing is fixedly connected to the inner wall of the sheath layer 3, and the inner ring is fixedly connected to the outer wall of the rotating shaft. The outer wall of the knob 10 has anti-slip texture. A through hole is located at the center of the knob 10, and a locking rod 11 is inserted into the through hole. One end of the locking rod 11 is threaded to the outer wall of the sheath layer 3 to fix the position of the knob 10. Multiple limiting grooves 13 are provided on the inner wall of the sheath layer 3. The limiting grooves 13 extend along the axial direction of the sheath layer 3. Multiple limiting blocks 14 are provided on the outer wall of the adjusting ring 6. The limiting blocks 14 are slidably connected to the limiting grooves 13 to prevent the adjusting ring 6 from rotating circumferentially. Multiple evenly distributed protrusions 15 are provided on the inner surface of the insulating layer 2. The top of each protrusion 15 contacts the outer wall of the correction block 4. The height of the protrusion 15 is less than the thickness of the correction block 4.

[0023] In actual use, the operator first removes the locking lever 11 from the through hole of the knob 10 to release the knob 10 from its fixed state. Then, by applying rotational force through the knob 10, the rotating shaft and rotating gear 9 are driven to rotate. Since the rotating gear 9 meshes with the drive rack 8, the drive rack 8 moves with the rotation of the rotating gear 9. The movement of the drive rack 8 causes the sliding block 7 to slide along the guide groove on the adjusting ring 6. The movement of the sliding block 7 drives the correction block 4, which is fixedly connected to it, to perform radial adjustment. The inner wall of the correction block 4 is connected to the conductor core 1 through the elastic support 5. Therefore, when the correction block 4 moves towards the center of the conductor core 1, it can correct the position of the conductor core 1. During this process, the inner arc-shaped groove of the correction block 4 fits against the outer surface of the conductor core 1, and the flexible pad acts as a buffer to avoid damage to the conductor core 1. At the same time, the design of the elastic support 5 allows the correction block 4 to be freely adjusted within a certain range to adapt to conductor cores 1 of different diameters.

[0024] The locating pin 12 on the outer wall of the adjusting ring 6 is threaded to the inner wall of the sheath layer 3. Inserting or removing the locating pin 12 restricts the axial movement of the adjusting ring 6, ensuring accuracy during the calibration process. The optimized tooth ratio between the rotating gear 9 and the drive rack 8 improves transmission efficiency, while the thrust bearing reduces frictional losses during rotation. The anti-slip texture on the outer wall of the knob 10 enhances ease of operation, and the locking lever 11 further improves the reliability of the device. The limiting groove 13 on the inner wall of the sheath layer 3 cooperates with the limiting block 14 on the outer wall of the adjusting ring 6 to prevent circumferential rotation of the adjusting ring 6, ensuring stability during the calibration process. The protrusion 15 on the inner surface of the insulating layer 2 contacts the outer wall of the calibration block 4, evenly distributing pressure and avoiding localized stress concentration. The microporous structure of the flexible gasket not only enhances friction but also provides shock absorption, further improving the calibration effect.

[0025] After correcting the eccentricity of conductor core 1, the operator re-inserts locking rod 11 into the through hole of knob 10 and threads it onto the outer wall of sheath layer 3 to fix the position of knob 10 and maintain the corrected state. At this time, adjusting ring 6, through the cooperation of sliding block 7 and correction block 4, keeps conductor core 1 in the center position of the cable, thereby correcting the cable eccentricity problem. This structural design can effectively improve the electrical performance and service life of the cable while reducing construction difficulty and maintenance costs, meeting practical application requirements.

[0026] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principles of this utility model are further explained below in conjunction with specific application scenarios.

[0027] In practical applications, cable installation and eccentricity correction operations are typically performed on-site during overhead line construction. First, the operator secures one end of the cable to a pole or support, ensuring the cable is in a natural suspension state to observe whether conductor core 1 is eccentric. If conductor core 1 is found to be off-center, the correction operation begins.

[0028] Step 1: Calibration Preparation Stage. The operator first checks whether the locking rod 11 is inserted into the through hole of the knob 10. If it is inserted, unscrew it to release the locking state of the knob 10. Next, confirm whether the locating pin 12 on the adjusting ring 6 is threadedly connected to the inner wall of the sheath layer 3. If the locating pin 12 is inserted into the locating hole, pull it out to release the axial movement restriction of the adjusting ring 6. This step ensures that the adjusting ring 6 can slide freely within the sheath layer 3, thus providing the basic conditions for subsequent calibration operations.

[0029] Step 2: Radial Adjustment of Correction Block 4. The operator applies rotational force by manually rotating knob 10, which drives the rotating shaft and rotating gear 9 to rotate. Since the rotating gear 9 meshes with the drive rack 8, the drive rack 8 moves axially along with the rotation of the rotating gear 9. The movement of the drive rack 8 pushes the sliding block 7 to slide along the guide groove on the adjusting ring 6. The T-shaped cross-section design of the sliding block 7, combined with the ball bearing structure, effectively reduces sliding resistance, making the sliding process smoother. The movement of the sliding block 7 further drives the correction block 4, which is fixedly connected to it, to perform radial adjustment. The inner wall of the correction block 4 is connected to the conductor core 1 through the elastic support 5. Therefore, when the correction block 4 moves closer to the center of the conductor core 1, the position of the conductor core 1 can be corrected. During this process, the arc-shaped groove on the inner side of the correction block 4 fits against the outer surface of the conductor core 1, and the microporous structure of the flexible gasket enhances the friction, preventing damage to the conductor core 1 due to excessive correction force. Meanwhile, the design of the elastic support 5 allows the correction block 4 to be freely adjusted within a certain range to adapt to conductor cores 1 of different diameters, ensuring the flexibility and accuracy of the correction process.

[0030] Step 3: Ensuring Calibration Accuracy. During the calibration process, the limiting block 14 on the outer wall of the adjusting ring 6 slides into the limiting groove 13 on the inner wall of the sheath layer 3, preventing the adjusting ring 6 from rotating circumferentially and thus ensuring the stability of the calibration process. Furthermore, the protrusions 15 on the inner surface of the insulation layer 2 are evenly distributed and contact the outer wall of the calibration block 4, dispersing pressure and avoiding localized stress concentration, further improving the calibration effect. After the calibration block 4 is adjusted to the appropriate position, the operator re-inserts the positioning pin 12 into the positioning hole of the adjusting ring 6 and threads it into the inner wall of the sheath layer 3 to restrict the axial movement of the adjusting ring 6 and ensure the stability of the calibration state.

[0031] Step 4: Locking the Correction State. After completing the eccentricity correction of conductor core 1, the operator reinserts the locking rod 11 into the through hole of knob 10 and threaded it onto the outer wall of the sheath layer 3 to fix the position of knob 10 and maintain the correction state. At this time, the adjusting ring 6, through the cooperation of the sliding block 7 and the correction block 4, keeps conductor core 1 in the center position of the cable, thereby effectively correcting the cable eccentricity problem. This process not only improves the electrical performance of the cable but also significantly extends its service life.

[0032] Through the above steps, the eccentricity correction structure of this invention can efficiently and automatically complete the eccentricity correction task of cables. The arc-shaped groove and flexible pad design of the correction block 4 effectively avoid damage to the conductor core 1, and the adjustability of the elastic support 5 adapts to conductor cores 1 of different diameters, ensuring the flexibility of the correction process. The limiting groove 13 and limiting block 14 between the adjusting ring 6 and the sheath layer 3 cooperate to prevent the circumferential rotation of the adjusting ring 6 during the correction process, improving the stability of the correction. The protrusions 15 on the inner surface of the insulation layer 2 evenly distribute the pressure, avoiding local stress concentration and further optimizing the correction effect. In summary, this invention, through its ingenious structural design and reasonable operating principle, achieves an efficient solution to the cable eccentricity problem and meets the needs of practical applications.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A 10kV overhead insulated cable with an eccentric correction structure, comprising: The cable comprises a conductor core (1), an insulation layer (2) wrapped around the conductor core (1), and a sheath layer (3) disposed outside the insulation layer (2), characterized in that the cable further comprises: An eccentricity correction assembly includes multiple correction blocks (4) symmetrically distributed around the outer periphery of the conductor core (1), with an elastic support (5) between the inner sidewall of each correction block (4) and the conductor core (1), and the outer sidewall of the correction block (4) in contact with the inner surface of the insulating layer (2). An adjusting ring (6) is sleeved on the outside of the insulating layer (2) and slidably connected to the inner wall of the sheath layer (3). Multiple guide grooves are provided on the inner side wall of the adjusting ring (6), and a sliding block (7) is provided in each guide groove. One end of the sliding block (7) extends out of the guide groove and is fixedly connected to the outer side wall of the correction block (4). Among them, the outer wall of the adjusting ring (6) is provided with at least one set of driving racks (8), the driving racks (8) mesh with a rotating gear (9), the rotating gear (9) is rotatably connected to the outer wall of the sheath layer (3) through a rotating shaft, one end of the rotating shaft extends to the outside of the sheath layer (3) and is connected to a knob (10).

2. A 10KV overhead insulated cable with an eccentric correction structure as described in claim 1, characterized in that, The inner wall of the correction block (4) is provided with an arc-shaped groove. The radius of curvature of the arc-shaped groove matches the outer diameter of the conductor core (1), and a flexible pad is embedded on the inner surface of the arc-shaped groove.

3. A 10KV overhead insulated cable with an eccentric correction structure as described in claim 1, characterized in that, The elastic support (5) is a spring column, and its two ends are fixed to the inner side wall of the correction block (4) and the outer side wall of the conductor core (1) by threaded connection, and the axial direction of the spring column is consistent with the radial direction of the conductor core (1).

4. A 10KV overhead insulated cable with an eccentric correction structure as described in claim 1, characterized in that, The sliding block (7) has a T-shaped cross-section, and the part located in the guide groove is provided with balls, which roll in contact with the inner wall of the guide groove.

5. A 10KV overhead insulated cable with an eccentric correction structure as described in claim 1, characterized in that, The outer wall of the adjusting ring (6) is provided with a positioning hole, and a positioning pin (12) is inserted into the positioning hole. The other end of the positioning pin (12) is threaded to the inner wall of the sheath layer (3).

6. A 10KV overhead insulated cable with an eccentric correction structure as described in claim 1, characterized in that, The ratio of the number of teeth of the rotating gear (9) to the number of teeth of the drive rack (8) is 2:

1. Both sides of the rotating gear (9) are provided with thrust bearings. The outer ring of the thrust bearing is fixedly connected to the inner wall of the sheath layer (3), and the inner ring is fixedly connected to the outer wall of the rotating shaft.

7. A 10KV overhead insulated cable with an eccentric correction structure as described in claim 1, characterized in that, Multiple sets of limiting grooves (13) are provided on the inner wall of the sheath layer (3). The limiting grooves (13) extend along the axial direction of the sheath layer (3). Multiple sets of limiting blocks (14) are provided on the outer wall of the adjusting ring (6). The limiting blocks (14) are slidably connected to the limiting grooves (13).

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