Novel rat and termite proof extra high voltage cable

Abstract

This invention discloses a novel rodent- and termite-proof ultra-high voltage cable, comprising a cable body, which, from the inside out, consists of a conductor, an insulation layer, a filling layer, a wrapping tape, an inner sheath, a steel strip, and an outer sheath; it also includes two protective tubes, each with a storage cavity containing a repellent liquid; a clamp, on which a sponge and a sealing strip are fixedly mounted, and a connection hole is provided; the protective tubes have a connecting part, and the storage cavity is connected to the connection hole through the connecting part; by adding the repellent liquid into the storage cavity, it is absorbed by the sponge through the connecting part and the connection hole, giving the connection between the protective tube and the cable body a termite-proof effect; and after the repellent liquid on the sponge evaporates and sublimates, the constant force spring pulls on the sliding rod and sliding ring, causing the sliding ring to push the repellent liquid to replenish the sponge, thereby ensuring the rodent- and termite-proof effect of the cable after connection.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, specifically to a novel rodent- and ant-proof ultra-high voltage cable. Background Technology

[0002] Currently, cables are widely used. Besides being damaged by environmental factors such as oxygen, heat, light, force, and chemical corrosion, cables are also susceptible to damage from animals like termites and rodents. This damage can lead to power outages, signal interruptions, and other accidents. To prevent this damage, existing cables generally employ physical or chemical methods. Physical protection involves using a high-hardness outer sheath of nylon or high-density polyethylene. Chemical methods involve adding repellents or inhibitors to the cable sheath to repel or kill these animals.

[0003] In the existing technology, cables may still break or break due to various factors during use, requiring wiring operations. During the wiring process, the conductors of the cable are connected by crimp sleeves or bolt connectors, and a junction box is installed on the outside of the connection point. Encapsulating glue is added to the junction box to seal and protect the connection point.

[0004] After wiring, gaps may appear at the junction box and cable connection point after prolonged use due to external forces or environmental influences. Since there is a lack of rodent and ant-proof materials at this point, termites can easily enter and cause gnawing, rotting, and corrosion of the connection point due to termite secretions, thus affecting the service life of the cable. Summary of the Invention

[0005] The purpose of this invention is to provide a novel rodent- and ant-proof ultra-high voltage cable to overcome the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A new type of rodent- and ant-proof ultra-high voltage cable includes a cable body, which consists of, from the inside out, a conductor, an insulation layer, a filling layer, a wrapping tape, an inner sheath, a steel tape, and an outer sheath.

[0008] It also includes two protective tubes, each with a storage cavity containing a repellent liquid;

[0009] The clamp has a sponge and a sealing strip fixedly installed on it, and a docking hole is provided on the clamp. The protective tube has a connecting part, and the storage cavity is connected to the docking hole through the connecting part.

[0010] A sliding rod is slidably mounted on the protective tube, and a sliding ring is fixedly mounted on the sliding rod. The sliding ring is slidably and sealingly connected to the inner wall of the storage cavity, and a constant force spring is provided between the sliding rod and the protective tube.

[0011] It also includes a reset component that resets and limits the sliding rod when repellent fluid is added to the storage cavity, and releases the limit on the sliding rod after the repellent fluid is added.

[0012] Preferably, the reset assembly includes a take-up shaft rotatably mounted on the protective tube, a pull rope is provided between the take-up shaft and the sliding rod, and the two ends of the pull rope are fixedly connected to the take-up shaft and the sliding rod respectively, and are wound around the take-up shaft.

[0013] Preferably, a pressure plate is slidably disposed on the protective tube, a rotating column is rotatably disposed on the pressure plate, a friction plate is fixedly disposed on the winding shaft, and a cone is disposed at the bottom of the rotating column, which rubs against the friction plate.

[0014] Preferably, the reset assembly further includes a snap-fit ​​block slidably disposed on the protective tube, the sliding rod is provided with a snap-fit ​​groove, the snap-fit ​​block engages with the snap-fit ​​groove, and both the snap-fit ​​block and the snap-fit ​​groove are provided with inclined surfaces.

[0015] Preferably, an abutment rod is fixedly provided on the snap-fit ​​block, and the abutment rod abuts against the pressure plate;

[0016] Multiple limiting springs are provided between the snap-fit ​​block and the protective tube, and the two ends of the limiting springs are fixedly connected to the snap-fit ​​block and the protective tube, respectively.

[0017] Preferably, a sealing part is fixedly provided on the pressure plate, the sealing part is disposed inside the connecting part and abuts against the side wall of the connecting part.

[0018] Preferably, a plurality of support springs are provided between the pressure plate and the protective tube, and the two ends of the support springs are fixedly connected to the pressure plate and the protective tube, respectively.

[0019] Preferably, it also includes a fixing bolt, which is threadedly connected to the protective pipe and the bolt head abuts against the pressure plate.

[0020] Preferably, it also includes a sealing bolt, which is threadedly connected to the filling hole of the storage cavity, and the bolt head abuts against the pressure plate.

[0021] Preferably, the two protective tubes are connected by bolts and nuts, and a sealing ring is provided between them.

[0022] In the above technical solution, the novel rodent- and ant-proof ultra-high voltage cable provided by the present invention has the following beneficial effects:

[0023] By adding repellent liquid into the storage chamber, it is absorbed by the sponge through the connecting part and the docking hole, giving the connection between the protective tube and the cable body a termite-proof effect. After the repellent liquid on the sponge evaporates and sublimates, the constant force spring pulls on the sliding rod and sliding ring, causing the sliding ring to push the repellent liquid to replenish the sponge. This ensures the cable's rodent and termite-proof effect after wiring, and improves the cable's service life and stability.

[0024] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0025] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0028] Figure 2 A cross-sectional view of the cable body provided in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the protective tube provided in an embodiment of the present invention;

[0030] Figure 4 This is a side cross-sectional view of the protective pipe provided in an embodiment of the present invention;

[0031] Figure 5 Provided for embodiments of the present invention Figure 4 Enlarged view of point A in the middle;

[0032] Figure 6 Provided for embodiments of the present invention Figure 4 Enlarged view of point B in the middle;

[0033] Figure 7 This is a schematic diagram of the clamp structure provided in an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the sliding rod and winding shaft structure provided in an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the snap-fit ​​block structure provided in an embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Cable body; 11. Conductor; 12. Insulation layer; 13. Filler layer; 14. Wrapping tape; 15. Inner sheath; 16. Steel strip; 17. Outer sheath; 2. Protective tube; 21. Storage cavity; 22. Connecting part; 3. Clamp; 31. Sponge; 32. Sealing strip; 33. Butt joint hole; 4. Sliding rod; 41. Sliding ring; 42. Snap-fit ​​groove; 43. Pull rope; 44. Constant force spring; 5. Rewinding shaft; 51. Friction plate; 6. Snap-fit ​​block; 61. Abutment rod; 62. Limiting spring; 7. Pressure plate; 71. Rotating column; 72. Sealing part; 73. Support spring; 8. Sealing bolt; 81. Fixing bolt. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0039] Please refer to 1-9. The new type of rodent- and ant-proof ultra-high voltage cable includes a cable body 1, which, from the inside out, consists of a conductor 11, an insulation layer 12, a filling layer 13, a wrapping tape 14, an inner sheath 15, a steel strip 16, and an outer sheath 17. It also includes two protective tubes 2, each with a storage cavity 21 containing repellent liquid; a clamp 3, on which a sponge 31 and a sealing strip 32 are fixedly installed, and a mating hole 33 is provided. A connecting part 22 is provided on the protective tubes 2, and the storage cavity 21 is connected to the mating hole 33 through the connecting part 22; a sliding rod 4 is slidably mounted on the protective tubes 2, and a sliding ring 41 is fixedly mounted on the sliding rod 4. The sliding ring 41 is slidably and sealingly connected to the inner wall of the storage cavity 21. A constant force spring 44 is provided between the protective tube 4 and the protective tube 2; it also includes a reset assembly, which resets and limits the sliding rod 4 when repellent is added to the storage cavity 21, and releases the limit on the sliding rod 4 after the repellent is added, and fixes the clamp 3 to the cable body 1 by bolts. After the conductor 11 of the cable body 1 is wired, the two protective tubes 2 are abutted against the corresponding clamps 3, and the two protective tubes 2 are connected by bolts and nuts. After fixing, a cavity is formed between the two protective tubes 2. A grouting port is set on one of the protective tubes 2, and potting compound is poured into the cavity to seal and protect the connection point; by setting the storage cavity 21 on the protective tube 2, it connects with the connecting part 22 and the docking hole 3. The connection of the three parts allows the repellent liquid in the storage chamber 21 to be absorbed by the sponge 31, and the repellent liquid evaporates on the sponge 31, thus achieving the effect of repelling rodents and ants and improving the service life and stability of the cable. By setting up a sliding rod 4 and a sliding ring 41, and connecting the sliding rod 4 with a constant force spring 44, when the repellent liquid on the sponge 31 evaporates, the sliding rod 4 and the sliding ring 41 slide under the action of the constant force spring 44, pushing the repellent liquid in the storage chamber 21 through the docking hole 33 of the connecting part 22 onto the sponge 31 for absorption, so as to achieve a long-term repellent effect. When the sponge 31 is saturated, the sponge 31, through its water-repellent properties after saturation, maintains a balance between the repellent liquid, the constant force spring 44, the sliding rod 4, and the sliding ring 41. By setting a constant force spring 44, the sliding rod 4 and the sliding ring 41 slide to a certain position. The tension of the constant force spring 44 on the sliding rod 4 is constant, which can ensure that the repellent liquid in the storage cavity 21 is pushed to the inner sponge 31 of the connecting part 22 and the docking hole 33 for adsorption by the constant pressure of the sliding ring 41 during the consumption process, thus ensuring the stability of the sponge 31 in the process of evaporating the repellent liquid. The repellent liquid is a solution formed by dissolving camphor in isopropanol. With isopropanol as a carrier, the sponge 31 can be stably adsorbed without affecting the properties of the sponge 31. Camphor repels termites, preventing termites from gnawing, borerating, and corroding the protective tube 2 and the cable body 1 with secretions, thereby improving the service life of the cable.

[0040] Specifically, the reset assembly includes a winding shaft 5 rotatably mounted on the protective tube 2. A pull rope 43 is provided between the winding shaft 5 and the sliding rod 4. The two ends of the pull rope 43 are fixedly connected to the winding shaft 5 and the sliding rod 4, respectively, and are wound around the winding shaft 5. When repellent liquid is added to the storage cavity 21, the winding shaft 5 rotates to wind up the pull rope 43, causing the sliding rod 4 and the sliding ring 41 to slide and reset. It also stretches the constant force spring 44, so that after the repellent liquid is added, the constant force spring 44 continues to rotate the sliding rod 4 and the sliding ring 41, causing the sponge 31 to absorb the liquid and achieve the effect of repelling ants.

[0041] In a further embodiment of the present invention, a pressure plate 7 is slidably disposed on the protective tube 2, a rotating column 71 is rotatably disposed on the pressure plate 7, and a friction plate 51 is fixedly disposed on the winding shaft 5. The bottom of the rotating column 71 is tapered and makes frictional contact with the friction plate 51. Under the action of the pressure plate 7, the tapered part at the bottom of the rotating column 71 does not contact the friction plate 51. At this time, the constant force spring 44 can pull the sliding rod 4 to slide, so that the pull rope 43 pulls the winding shaft 5 to rotate, thereby realizing the sliding of the sliding rod 4 and the sliding ring 41. This allows the sponge 31 to absorb the repellent liquid. When the repellent liquid is added to the storage cavity 21, the pressure plate 7 moves upward, causing the conical part at the bottom of the rotating column 71 to abut against the friction plate 51. By rotating the rotating column 71, the winding shaft 5 rotates to wind up the pull rope 43. The pull rope 43 pulls the sliding rod 4 and the sliding ring 41 to reset, and stretches the constant force spring 44. This allows the constant force spring 44 to push the sliding ring 41 to push the repellent liquid after it is added, so that the sponge 31 can absorb the repellent liquid.

[0042] Furthermore, the reset assembly also includes a snap-fit ​​block 6 slidably mounted on the protective tube 2. A snap-fit ​​groove 42 is provided on the sliding rod 4, and the snap-fit ​​block 6 engages with the snap-fit ​​groove 42. Both the snap-fit ​​block 6 and the snap-fit ​​groove 42 have inclined surfaces. An abutment rod 61 is fixedly mounted on the snap-fit ​​block 6, and the abutment rod 61 engages with the pressure plate 7. Multiple limiting springs 62 are provided between the snap-fit ​​block 6 and the protective tube 2. The two ends of the limiting springs 62 are fixedly connected to the snap-fit ​​block 6 and the protective tube 2, respectively. When repellent fluid is added to the storage cavity 21, the pressure plate 7 moves upward. After the abutment rod 61 loses the pressure of the pressure plate 7, under the action of the limiting springs 62, the snap-fit ​​block 6 and the abutment rod 61 move upward. Subsequently, the winding shaft 5 rotates, causing the sliding rod 4 and the sliding ring 41 to reset. During the reset sliding process of the sliding rod 4, the snap-fit ​​block... The inclined surface on 6 presses against the locking block 6, and through the locking block 6, the locking groove 42 is aligned with the locking block 6. Under the action of the limiting spring 62, the locking block 6 and the locking groove 42 are engaged, limiting the sliding rod 4. This prevents the constant force spring 44 from pulling the sliding rod 4 to slide during the addition of repellent fluid, which could result in the repellent fluid not being added, or overflowing from the filling port of the storage cavity 21 due to the sliding action of the sliding rod 4 and the sliding ring 41. After the repellent fluid is added, the filling port is sealed, the pressure plate 7 moves down, and by pressing the abutment rod 61 down, the locking block 6 is disengaged from the locking groove 42. At the same time, the bottom conical part of the rotating column 71 is disengaged from the friction plate 51. At this time, the constant pressure spring can drive the sliding rod 4 and the sliding ring 41 to slide, so that the repellent fluid is absorbed by the sponge 31.

[0043] Furthermore, a sealing part 72 is fixedly provided on the pressure plate 7. The sealing part 72 is disposed inside the connecting part 22 and abuts against the side wall of the connecting part 22. When the pressure plate 7 moves upward and the repellent liquid is added, the pressure plate 7 moves upward with the sealing part 72, so that it seals the connecting part 22. This prevents the sliding ring 41 from creating negative pressure in the storage cavity 21 during the sliding reset process, which would cause the residual liquid in the connecting part 22 to flow back into the storage cavity 21. This would result in air in the connecting part 22, which would affect the adsorption of the repellent liquid by the sponge 31 after the repellent liquid is added.

[0044] In a further embodiment of the present invention, a plurality of support springs 73 are provided between the pressure plate 7 and the protective tube 2. The two ends of the support springs 73 are fixedly connected to the pressure plate 7 and the protective tube 2 respectively. When the repellent fluid is added, the pressure plate 7 moves upward under the action of the support springs 73. After the addition is completed, the pressure plate 7 moves downward to compress the support springs 73.

[0045] In the embodiments provided by the present invention, a fixing bolt 81 is also included, which is threadedly connected to the protective tube 2 and the bolt head abuts against the pressure plate 7. A sealing bolt 8 is also included, which is threadedly connected to the filling hole of the storage cavity 21 and the bolt head abuts against the pressure plate 7. When adding repellent fluid into the storage cavity 21, the sealing bolt 8 and the fixing bolt 81 are unscrewed. Under the action of the support spring 73, the pressure plate 7 moves upward, thereby completing the abutment between the sealing part 72 and the inner wall of the communicating cavity, and the abutment between the tapered part at the bottom of the rotating column 71 and the friction plate 51. After the repellent fluid is added, the sealing bolt 8 is installed first, so that the pressure plate 7 moves downward, and the filling port of the storage cavity 21 is sealed by the sealing bolt 8, and the snap-fit ​​block 6 is disengaged from the snap-fit ​​groove 42. Then the fixing bolt 81 is installed to strengthen the fixation of the pressure plate 7 and improve its stability.

[0046] Specifically, the two protective tubes 2 are connected by bolts and nuts, and a sealing ring is provided between them. After the two protective tubes 2 are fixedly connected by bolts and nuts, one of the protective tubes 2 is provided with an inlet for adding potting compound. Potting compound is added into the cavity formed by the two protective tubes 2, and the inlet is sealed to ensure the insulation and sealing of the cable after wiring.

[0047] Working principle: When wiring the cable, the protective tube 2 and clamp 3 are fitted onto the cable body 1, and the protective tube 2 is slid to avoid affecting the wiring of the two cable conductors 11. At the same time, the clamp 3 is fixed to the cable body 1 with bolts. After the conductors 11 are connected, the protective tube 2 is slid so that it abuts against the clamp 3, and the two protective tubes 2 are connected and fixed with bolts and nuts. Then, potting compound is added into the cavity formed by the two protective tubes 2. Then, the sealing bolt 8 and fixing bolt 81 are unscrewed. Under the action of the support spring 73, the pressure plate 7 moves upward with the rotating column 71 and the sealing part 72. The sealing part 72 abuts against the inner wall of the connecting part 22 to seal it. The rotating column 71 moves upward so that its bottom conical part contacts the friction plate 51. The rotating column 71 then drives the winding shaft 5 to rotate, pulling the rope 43 to make the sliding rod 4 slide with the sliding ring 41 until the locking block 6 and the locking groove 42 are engaged. At this time, the sliding rod 4 and the sliding ring 41 have completed sliding and are limited. The repellent fluid is added into the storage cavity 21 through the filling hole at the position of the sealing bolt 8. After the filling is completed, the sealing bolt 8 is installed to seal the filling hole of the storage cavity 21 and the pressure plate 7 is pressed down. At the same time as the pressure plate 7 is pressed down, the conical position on the rotating column 71 disengages from the friction plate 51, the sealing part 72 disengages from the inner wall of the connecting part 22, and the pressure plate 7 presses the locking block 6 down to disengage it from the locking groove 42. Then the fixing bolt 81 is installed to further fix the pressure plate 7 to complete the process.

[0048] During cable use, the repellent liquid on the sponge 31 evaporates, causing the sliding ring 41 to slide under the action of the constant force spring 44. The repellent liquid inside the storage cavity 21 is brought into contact with the sponge 31 through the connecting part 22 and the docking hole 33, and is absorbed by the sponge 31. After the sponge 31 is saturated with the repellent liquid, its micropores and gaps are completely filled with the repellent liquid, leaving no extra space to accommodate new liquid, causing the sliding ring 41 to stop sliding. When the repellent liquid on the sponge 31 evaporates and sublimates, the constant force spring 44 causes the sliding rod 4 to slide against the sliding ring 41, replenishing the repellent liquid in the sponge 31.

[0049] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A novel rodent- and ant-proof ultra-high voltage cable, comprising a cable body (1), characterized in that, The cable body (1) consists of, from the inside out, a conductor (11), an insulation layer (12), a filling layer (13), a wrapping tape (14), an inner sheath (15), a steel strip (16), and an outer sheath (17). It also includes two protective tubes (2), each of which has a storage cavity (21) and contains a repellent liquid. A clamp (3) is fixedly provided with a sponge (31) and a sealing strip (32). A docking hole (33) is provided on the clamp (3). A connecting part (22) is provided on the protective tube (2). The storage cavity (21) is connected to the docking hole (33) through the connecting part (22). A sliding rod (4) is slidably provided on the protective tube (2), and a sliding ring (41) is fixedly provided on the sliding rod (4). The sliding ring (41) is slidably and sealingly connected to the inner wall of the storage cavity (21), and a constant force spring (44) is provided between the sliding rod (4) and the protective tube (2). It also includes a reset component, which resets and limits the sliding rod (4) when repellent is added to the storage cavity (21), and releases the limit on the sliding rod (4) after the repellent is added; The reset assembly includes a take-up shaft (5) rotatably mounted on the protective tube (2), and a pull rope (43) is provided between the take-up shaft (5) and the sliding rod (4). The two ends of the pull rope (43) are fixedly connected to the take-up shaft (5) and the sliding rod (4) respectively, and are wound around the take-up shaft (5). A pressure plate (7) is slidably arranged on the protective tube (2), a rotating column (71) is rotatably arranged on the pressure plate (7), a friction plate (51) is fixedly arranged on the winding shaft (5), and a cone is provided at the bottom of the rotating column (71) and rubs against the friction plate (51). The reset assembly also includes a snap-fit ​​block (6) slidably disposed on the protective tube (2), and a snap-fit ​​groove (42) is provided on the sliding rod (4). The snap-fit ​​block (6) is snapped into the snap-fit ​​groove (42), and both the snap-fit ​​block (6) and the snap-fit ​​groove (42) are provided with inclined surfaces. An abutment rod (61) is fixedly provided on the snap-fit ​​block (6), and the abutment rod (61) abuts against the pressure plate (7); Multiple limiting springs (62) are provided between the snap-fit ​​block (6) and the protective tube (2), and the two ends of the limiting springs (62) are fixedly connected to the snap-fit ​​block (6) and the protective tube (2) respectively.

2. The novel rodent- and ant-proof ultra-high voltage cable according to claim 1, characterized in that, A sealing part (72) is fixedly provided on the pressure plate (7). The sealing part (72) is disposed inside the connecting part (22) and abuts against the side wall of the connecting part (22).

3. The novel rodent- and ant-proof ultra-high voltage cable according to claim 1, characterized in that, Multiple support springs (73) are provided between the pressure plate (7) and the protective tube (2), and the two ends of the support springs (73) are fixedly connected to the pressure plate (7) and the protective tube (2) respectively.

4. The novel rodent- and ant-proof ultra-high voltage cable according to claim 1, characterized in that, It also includes a fixing bolt (81), which is threadedly connected to the protective tube (2), and the bolt head abuts against the pressure plate (7).

5. The novel rodent- and ant-proof ultra-high voltage cable according to claim 1, characterized in that, It also includes a sealing bolt (8), which is threaded to the filling hole of the storage cavity (21), and the bolt head abuts against the pressure plate (7).

6. The novel rodent- and ant-proof ultra-high voltage cable according to claim 1, characterized in that, The two protective tubes (2) are connected by bolts and nuts, and a sealing ring is provided between them.

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