An extrusion-resistant cable and a method for extrusion-resistant cable thereof

Abstract

This invention relates to the technical field of compression-resistant cables, and particularly to a compression-resistant cable and its compression-resistant method. The cable includes a core body, a protective layer on the outside of the core body, and a compression-resistant component between the protective layer and the core body. A through groove is provided within the protective layer, and a circular tube is provided on the side of the through groove away from the core body. A cavity is also provided within the protective layer, and two channels are provided within the circular tube, each channel communicating with a cavity on one side of the circular tube. When the compression-resistant cable is subjected to external compression, the elastic deformation of the cavity itself, the elastic element, and the friction between the core body and the protrusions during movement buffer the external pressure, reducing damage to the core body. Furthermore, the core body vibrates as it passes the protrusions, which helps to agitate the polyurethane foam within the cavity, reducing sedimentation.

Description

Technical Field

[0001] This invention relates to the technical field of compression-resistant cables, and in particular to a compression-resistant cable and a method for compression-resistant cables. Background Technology

[0002] Cables are a type of conductor frequently used in modern society. Various types of cables are used in electrical control, power transmission and other related fields. Currently, most cables on the market are produced using rubber sheathing. With the development of technology, compression-resistant cables have been greatly developed, which has brought great convenience to people in the production and use of cables. Their types and quantities are also increasing day by day.

[0003] A compression-resistant cable, disclosed in Chinese Patent Application No. CN202210251573.6, includes a main body with copper core conductors on its outer surface. An elastic device is located at the lower end of the copper core conductors. A water-blocking tube is located on one side of the main body. A wrapping tape is provided around the outer surface of the copper core conductors, and an inner padding layer is provided on the inner wall of the wrapping tape. This invention improves the cable's elasticity through the combined action of the filling layer, buffer tape, fixing rod, spring, and sleeve, making it less prone to deformation under external forces and preventing damage to the internal wires. The combined action of the wrapping layer, protrusions, reinforcing ribs, polyurethane elastic coating, film, corrosion-resistant coating, and anti-oxidation coating further enhances the cable's compression resistance. Because the outer wall of the wrapping layer has multiple protrusions, when the cable is compressed, the force is first applied directly to these protrusions, thus preventing internal compression of the cable.

[0004] However, in actual use, during cable transportation, cables are bundled together and loaded onto vehicles for transport. Cables located at the edges are often squeezed by the binding ropes. Ordinary cables will undergo local deformation when squeezed. During long-term compression, the wire core inside the cable is also prone to damage. Furthermore, when using the cable core, pipes are laid outside the cable core to isolate it from external compression, which increases the workload and material costs. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides an anti-extrusion cable and a method for anti-extrusion of the cable.

[0006] An anti-compression cable of the present invention includes a cable core body, a protective layer disposed on the outside of the cable core body, and an anti-compression component disposed between the protective layer and the cable core body;

[0007] The protective layer is provided with a through groove, and a circular tube is provided on the side of the through groove away from the cable core body. The protective layer is also provided with a cavity. The circular tube is provided with two channels, which are respectively connected to the cavities on both sides of the circular tube. A pressure valve is provided at the circular tube in each channel. Polyurethane foam is provided in the cavity.

[0008] The anti-compression component includes an elastic element with an arc-shaped plate on it. Limiting grooves are provided on both sides of the through groove. Sliders matching the limiting grooves are provided on both sides of the arc-shaped plate. A protrusion is provided on the side end of the through groove.

[0009] By incorporating components such as cavities, protrusions, elastic elements, round tubes, and cones, the anti-extrusion cable utilizes the elastic deformation of the cavity itself, the elastic elements, and the friction between the cable core and the protrusions during movement to buffer the external pressure, reducing damage to the cable core. Furthermore, the cable core vibrates as it passes the protrusions, agitating the polyurethane foam within the cavity and reducing sedimentation. Simultaneously, the cones may damage the round tubes or open the pressure valves within the tubes due to excessive pressure, allowing the polyurethane foam within the cavity to be discharged. This discharged foam provides cushioning and also expands, absorbs heat, and serves as a warning, enabling maintenance personnel to quickly locate the damage.

[0010] Preferably, the side of the elastic element away from the arc plate is fitted onto the outside of the circular tube, the cross-section of the through groove is bulb-shaped, the arc plate matches the cable core body, the spacing at the narrowest point of the through groove is greater than the width of the arc plate, and the spacing at the narrowest point of the through groove is greater than the diameter of the cable core body.

[0011] Preferably, three through slots are provided, and correspondingly, three elastic elements and three arc-shaped plates are provided. The included angle between the three through slots is 120°, and the cable core body is located between the three arc-shaped plates.

[0012] Preferably, the cable core body includes a wire core, the wire core is provided with multiple strands, each wire core is wrapped with a rubber layer, the multiple wire cores are provided with an insulating sheath, the insulating sheath is provided with a braided mesh layer, the braided mesh layer is provided with a cable outer sheath, and the braided mesh layer is filled with mineral filler.

[0013] Preferably, a pointed cone is provided on the side of the arc-shaped plate away from the cable core body. The pointed cone is in the shape of a hexagonal screwdriver head and corresponds to the position of the round tube.

[0014] Preferably, the surface of the protrusion is rough and elastic, the distance between the protrusions on both sides of the through groove is greater than the width of the arc plate, and the distance between the protrusions on both sides of the through groove is less than the diameter of the cable core body.

[0015] The present invention also provides a method for resisting the compression of an anti-compression cable, comprising the following steps:

[0016] S1. When the anti-extrusion cable is bundled, packaged and transported after production, it will be subjected to the compression of the binding rope and the compression caused by vehicle shaking. The anti-extrusion cable resists compression through the characteristics of its internal structure.

[0017] S2. When the compression-resistant cable is buried underground, if the pressure of passing vehicles is large or the ground is accidentally dug, the compression-resistant cable will be subjected to destructive compression under such circumstances. The compression-resistant cable resists compression by adjusting its internal structure during the compression process.

[0018] Preferably, the specific anti-compression method in step S1 includes the following steps:

[0019] S11. When the compression point during transportation is at point ①, since there is a cavity between point ① and the cable core body, the cavity at point ① will be compressed and deformed as the binding rope is tied to reduce the binding pressure of the binding rope and reduce the pressure acting on the cable core body. As the cavity at point ① is compressed and deformed, the side of the cavity near the cable core body will contact the cable core body, thereby compressing the cable core body. A through groove is provided on the opposite side of point ①. Therefore, when the cable core body is subjected to pressure in the direction of point ①, the cable core body will move in the opposite direction of point ①. When the cable core body moves, it will compress the elastic element in the direction of movement. With the assistance of the elastic element, on the one hand, the stable posture of the cable core body is ensured, and on the other hand, the elastic element can buffer the pressure and reduce the damage to the cable core body when it is compressed.

[0020] S12. If the compression position is near position ②, the compression of position ② by the binding rope will directly act on the elastic element corresponding to position ②, thereby compressing the elastic element. With the assistance of the elastic element, the binding pressure of the binding rope is weakened, thereby reducing the pressure on the cable core body.

[0021] S13. During the transportation of the compression-resistant cable, when the vehicle shakes, the impact of the vehicle shaking on the cable core body is reduced by the assistance of three-way elastic elements and three-way cavities, avoiding damage to the cable core body caused by the increased binding pressure of the binding rope due to vehicle shaking.

[0022] Preferably, the specific anti-compression method in step S2 includes the following steps:

[0023] S21. If the pressure point is located at ①, the cavity corresponding to ① will be squeezed and deformed. When the cable core body moves away from ① due to the squeezing deformation of the cavity, the elastic element on the opposite side of ① will buffer it. As the pressure increases, the deformation of the cavity at ① will increase the internal pressure. When the internal pressure of the cavity is greater than the pressure valve, the pressure valve is opened. The polyurethane foam in the cavity at ① is slowly discharged through the channels in the round tubes on both sides of the cavity at ①, thereby generating slow pressure relief in the cavity, which buffers the pressure at ①. The discharged polyurethane foam reacts with the moisture in the air in the channel and expands, filling the channels on both sides of ①. On the one hand, it strengthens the structural strength of the anti-extrusion cable near the pressure point. On the other hand, the polyurethane foam filled in the channel will form a protective layer at the front end of the cable core body.

[0024] As the cable core passes the protrusion, friction exists between the protrusion and the cable core. The pressure on the cable core is buffered by the combined assistance of friction and elastic elements, reducing the damage caused by the pressure. When the cable core passes the protrusion, the deformation and recovery of the protrusion will generate slight vibrations, thereby reducing the precipitation of polyurethane foam in the cavity corresponding to the protrusion. As the cable core continues to move, the cone on the arc plate in the direction of movement of the cable core will break the corresponding round tube, allowing the polyurethane foam in the cavities on both sides of the direction of movement of the cable core to be discharged through the broken round tube. The discharged polyurethane foam will generate resistance and buffer the movement of the cable core.

[0025] S22. If the pressure point is located at ②, deformation will occur at ②, directly acting on the elastic element corresponding to ②, thereby compressing the elastic element. The auxiliary pressure of the elastic element is weakened, thereby reducing the pressure on the cable core body and reducing the damage to the cable core body. As the pressure increases, the deformation at ② will gradually increase, thus increasing the degree of compression of the elastic element. This causes the round tube at ② to move towards the corresponding cone, thereby breaking the round tube. This allows the polyurethane foam in the cavities on both sides of ② to be discharged through the broken round tube. The discharged polyurethane foam will fill the through groove between ② and the cable core body to form a buffer.

[0026] When pressure is applied to the cable core body through the elastic element and the arc plate, the cable core body moves away from ②. The movement of the cable core body will generate pressure on the cavity on the opposite side of ② and deform it. The cavity acts as a buffer in the direction of movement of the cable core body to protect the cable core body.

[0027] S23. When the pressure applied to points ① and ② is too high, it will cause damage to points ① and ②, which will cause the polyurethane foam in the cavity to be discharged to the outside of the compression-resistant cable. On the one hand, it forms a protective barrier on the outside of the compression-resistant cable, and on the other hand, the expansion of the discharged polyurethane foam can also serve as a warning to the outside world, enabling construction personnel to quickly find the location of the compression-resistant cable damage for repair.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] By incorporating components such as cavities, protrusions, elastic elements, round tubes, and cones, the anti-extrusion cable utilizes the elastic deformation of the cavity itself, the elastic elements, and the friction between the cable core and the protrusions during movement to buffer the external pressure, reducing damage to the cable core. Furthermore, the cable core vibrates as it passes the protrusions, agitating the polyurethane foam within the cavity and reducing sedimentation. Simultaneously, the cones may damage the round tubes or open the pressure valves within the tubes due to excessive pressure, allowing the polyurethane foam within the cavity to be discharged. This discharged foam provides cushioning and also expands, absorbs heat, and serves as a warning, enabling maintenance personnel to quickly locate the damage. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the cable core body of the present invention;

[0032] Figure 3 This is the invention Figure 1 Enlarged structural diagram at point A;

[0033] Figure 4 This is a schematic diagram of the anti-extrusion component of the present invention;

[0034] Figure 5 This is the invention Figure 4 Enlarged structural diagram at point B;

[0035] Figure 6 This is a schematic diagram of the cross-sectional structure of the present invention.

[0036] Reference numerals: 1. Cable core body; 2. Protective layer; 3. Anti-crushing component; 101. Core; 102. Insulation sheath; 103. Braided mesh layer; 104. Cable outer sheath; 201. Through groove; 202. Circular tube; 203. Cavity; 204. Channel; 205. Pressure valve; 301. Elastic element; 302. Arc plate; 303. Limiting groove; 304. Slider; 305. Protrusion. Detailed Implementation

[0037] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0038] Example 1

[0039] like Figures 1 to 2 As shown, this embodiment provides an anti-compression cable, including a cable core body 1, a protective layer 2 disposed on the outside of the cable core body 1, and an anti-compression component 3 disposed between the protective layer 2 and the cable core body 1. The protective layer 2 is used to protect the cable core body 1, so that the cable core body 1 will not experience short circuit faults during use. The protective layer 2 and the anti-compression component 3 work together to enable the cable core body 1 to maintain a stable state when subjected to compression, reduce damage to the cable core body 1 caused by external compression, and improve the stability of the cable core body 1 in use.

[0040] The cable core body 1 includes a conductor 101, which has multiple strands. Each conductor 101 is wrapped with a rubber layer. An insulation layer 102 is provided on the outside of the multiple conductors 101. A braided mesh layer 103 is provided on the outside of the insulation layer 102. A cable sheath 104 is provided on the outside of the braided mesh layer 103. The braided mesh layer 103 is filled with mineral filler. The rubber layer on the outside of each conductor 101 can prevent the conductors 101 from being isolated from each other, thereby reducing the occurrence of short circuits between conductors 101. The mineral filler filled in the braided mesh layer 103 can effectively insulate heat and reduce the impact of external high temperature on conductors 101. Furthermore, the addition of mineral filler to the braided mesh layer 103 can effectively enhance the structural performance of the cable core body 1, making the cable core body 1 less prone to damage and improving the stability of the cable core body 1 in use. The cable sheath 104 can provide external protection and buffer for the entire cable core body 1.

[0041] During transportation or use, the cable core 1 inevitably encounters compression or bending. When subjected to compression or bending, the structure of the cable core 1 is easily damaged, such as breakage of the insulation layer 102 or braided mesh layer 103, breakage of the wire core 101, and deformation of the cable core 1. All of these can render the cable core 1 unusable. When using the cable core 1, a pipe is laid outside the cable core 1 to isolate it from external compression. However, this installation increases workload and material costs. To enhance the compression resistance of the cable core 1 and reduce the workload and costs during installation, the following solution is proposed:

[0042] like Figures 1 to 6As shown, a through groove 201 is provided inside the protective layer 2. A circular tube 202 is provided on the side of the through groove 201 away from the cable core body 1. A cavity 203 is also provided inside the protective layer 2. Two channels 204 are provided inside the circular tube 202. The two channels 204 are respectively connected to the cavities 203 on both sides of the circular tube 202. A pressure valve 205 is provided at the circular tube 202 in the channel 204. Polyurethane foam is provided inside the cavity 203. After the pressure valve 205 is opened, the polyurethane foam in the cavity 203 will be opened, so that the polyurethane foam will be discharged from the circular tube 202. The polyurethane foam will fill the through groove 201. Once the protective layer 2 is broken, the polyurethane foam will react with the moisture in the air and expand, thereby wrapping the damaged part of the protective layer 2 to form protection, thus protecting the internal cable core body 1.

[0043] The anti-compression component 3 includes an elastic element 301, an arc-shaped plate 302 on the elastic element 301, limiting grooves 303 on both sides of the through groove 201, and sliders 304 matching the limiting grooves 303 on both sides of the arc-shaped plate 302. A protrusion 305 is provided on the side end of the through groove 201. When the protective layer 2 is compressed, the pressure will act on the cable core body 1 through the protective layer 2. If the pressure is in the direction of the through groove 201, the cable core body 1 will move in the direction of the through groove 201, thereby compressing the elastic element 301. In this process, the pressure is buffered by the assistance of the elastic element 301 to indirectly protect the cable core body 1. With the assistance of the arc-shaped plate 302, the force transmission on the cable core body 1 can be smooth. When the arc-shaped plate 302 moves, it is limited by the sliders 304 and the limiting grooves 303. The elastic element 301 can be a wrinkled rubber or a foam material with good elasticity and toughness, and the elastic element 301 has a mesh.

[0044] The side of the elastic element 301 away from the arc plate 302 is fitted onto the outside of the round tube 202. The cross-section of the through groove 201 is bulb-shaped. The arc plate 302 matches the cable core body 1. The spacing at the narrowest point of the through groove 201 is greater than the width of the arc plate 302, and the spacing at the narrowest point of the through groove 201 is greater than the diameter of the cable core body 1. This ensures that the cable core body 1 can move smoothly when it is under pressure in the through groove 201. When the polyurethane foam discharged from the round tube 202 fills the through groove 201, it will cause resistance to the movement of the cable core body 1. In turn, with the cooperation of the elastic element 301, the pressure on the cable core body 1 is buffered.

[0045] There are three through slots 201, and correspondingly three elastic elements 301 and three arc plates 302. The included angle between the three through slots 201 is 120°. The cable core body 1 is located between the three arc plates 302. When the cable core body 1 is not compressed, the arc plates 302 in the three directions are attached to the surface of the cable core body 1 with the assistance of their respective elastic elements 301, so that the cable core body 1 is in the middle position. During transportation, even if shaking occurs, the elastic elements 301 can buffer the damage to the cable core body 1 caused by shaking, thereby improving the stability of the cable core body 1 in use.

[0046] A pointed cone is provided on the side of the arc plate 302 away from the cable core body 1. The pointed cone is in the shape of a hexagonal screwdriver head and corresponds to the position of the round tube 202. When the arc plate 302 moves, when the pointed cone contacts the round tube 202, it will break the round tube 202, thereby allowing the polyurethane foam in the cavity 203 to be discharged, thus providing another way for the polyurethane foam in the cavity 203 to be discharged.

[0047] The surface of the protrusion 305 is rough and elastic. The distance between the protrusions 305 on both sides of the through groove 201 is greater than the width of the arc plate 302. The distance between the protrusions 305 on both sides of the through groove 201 is less than the diameter of the cable core body 1. When the cable core body 1 is subjected to pressure and moves, it will be subjected to frictional resistance when passing through the protrusion 305, thereby further buffering the pressure on the cable core body 1. When the cable core body 1 crosses the protrusion 305, the protrusion 305 will vibrate after restoring its shape, thereby generating a vibration and stirring effect on the polyurethane foam in the cavity 203, reducing the precipitation of polyurethane foam caused by long-term static placement.

[0048] During cable transportation, cables are bundled together and loaded onto vehicles for transport. Cables located at the edges are often squeezed by the binding ropes. Ordinary cables will undergo local deformation when squeezed. During long-term compression, the wire core 101 inside the cable is also prone to damage.

[0049] The compression-resistant cable of this embodiment, when subjected to the compression of the binding rope, such as Figure 6As shown, if the compression position is near position ①, since there is a cavity 203 between ① and the cable core body 1, the cavity 203 at ① will be compressed and deformed as the binding rope is tied, thereby reducing the binding pressure of the binding rope and reducing the pressure acting on the cable core body 1. As the cavity 203 at ① is compressed and deformed, the side of the cavity 203 near the cable core body 1 will contact the cable core body 1, thereby compressing the cable core body 1. A through groove 201 is provided on the opposite side of ①. Therefore, when the cable core body 1 is subjected to pressure in the direction of ①, the cable core body 1 will move in the opposite direction of ①. When the cable core body 1 moves, it will compress the elastic element 301 in the direction of movement. With the assistance of the elastic element 301, on the one hand, the stable posture of the cable core body 1 is ensured, and on the other hand, the elastic element 301 can buffer the pressure and reduce the damage to the cable core body 1 when it is compressed.

[0050] If the compression point is near position ②, the compression of position ② by the binding rope will directly act on the elastic element 301 corresponding to position ②, thereby compressing the elastic element 301. With the assistance of the elastic element 301, the binding pressure of the binding rope is weakened, thereby reducing the pressure on the cable core body 1 and thus reducing the damage to the cable core body 1.

[0051] During the transportation of compression-resistant cables, vehicles inevitably experience shaking. However, with the assistance of three-directional elastic elements 301 and three-directional cavities 203, the impact of vehicle shaking on the cable core body 1 is reduced, avoiding damage to the cable core body 1 caused by increased binding pressure of the binding rope due to vehicle shaking, thus reducing damage to the compression-resistant cable during transportation.

[0052] During the transportation of the compression-resistant cable, even if the binding pressure of the binding rope increases due to the shaking of the vehicle, its binding pressure has little impact on the compression-resistant cable. However, when the compression-resistant cable is buried underground, if the pressure of the vehicles passing by on the ground is large or the ground is accidentally dug, the compression-resistant cable will often be subjected to greater pressure in this situation. In this process, if the pressure point is located at ①, the cavity 203 corresponding to ① will be squeezed and deformed. When the cable core body 1 moves away from ① due to the squeezing deformation of the cavity 203, the elastic element 301 on the opposite side of ① will generate a buffer, thereby protecting the cable core body 1.

[0053] As the pressure increases, the deformation of cavity 203 at point ① will increase the internal pressure. When the internal pressure of cavity 203 is greater than that of pressure valve 205, pressure valve 205 is opened, and the polyurethane foam in cavity 203 at point ① is slowly discharged through the channel 204 in the circular tube 202 on both sides of cavity 203 at point ①, thereby causing slow pressure relief in cavity 203 and buffering the pressure at point ①. The discharged polyurethane foam reacts with the moisture in the air in the through groove 201 and expands, filling the through groove 201 on both sides of point ①. On the one hand, it strengthens the structural strength of the anti-extrusion cable near the pressure point. On the other hand, the polyurethane foam filled in the through groove 201 forms a protective layer at the front end of the cable core body 1 to enhance the protection of the cable core body 1.

[0054] As the cable core body 1 moves away from ①, friction exists between the protrusion 305 and the cable core body 1 as the cable core body 1 passes the protrusion 305. The friction and the elastic element 301 work together to buffer the pressure on the cable core body 1, reducing the damage caused by the pressure. When the cable core body 1 passes the protrusion 305, the deformation and recovery of the protrusion 305 will generate slight vibrations, thereby reducing the precipitation of polyurethane foam in the cavity 203 corresponding to the protrusion 305. As the cable core body 1 continues to move, the cone on the arc plate 302 in the direction of movement of the cable core body 1 will break the corresponding round tube 202, allowing the polyurethane foam in the cavities 203 on both sides of the direction of movement of the cable core body 1 to be discharged through the broken round tube 202. The discharged polyurethane foam will generate resistance and buffer the movement of the cable core body 1, further strengthening the protection of the cable core body 1 and improving the stability of the extrusion-resistant cable.

[0055] If the pressure point is located at ②, deformation will occur at ②, directly acting on the corresponding elastic element 301 at ②, thereby compressing the elastic element 301. The auxiliary pressure of the elastic element 301 is weakened, thereby reducing the pressure on the cable core body 1 and reducing the damage to the cable core body 1. As the pressure increases, the deformation at ② will gradually increase, thus increasing the degree of compression of the elastic element 301. This causes the circular tube 202 at ② to move towards the corresponding cone, thereby breaking the circular tube 202. This allows the polyurethane foam in the cavities 203 on both sides of ② to be discharged through the broken circular tube 202. The discharged polyurethane foam will fill the through groove 201 between ② and the cable core body 1 to form a buffer.

[0056] When pressure is applied to the cable core body 1 through the elastic element 301 and the arc plate 302, the cable core body 1 will move away from ②. The movement of the cable core body 1 will generate pressure on the cavity 203 on the opposite side of ② and deform it. The cavity 203 acts as a buffer in the direction of movement of the cable core body 1 to protect the cable core body 1 and improve the stability of the cable core body 1 in use.

[0057] When the pressure applied to points ① and ② is too high, it will cause damage to points ① and ②, which will cause the polyurethane foam in cavity 203 to be discharged to the outside of the anti-extrusion cable. On the one hand, it forms a protective barrier on the outside of the anti-extrusion cable, and on the other hand, the expansion of the discharged polyurethane foam can also serve as a warning to the outside world, enabling construction personnel to quickly find the location of the damage to the anti-extrusion cable for repair, thus improving the convenience of equipment use.

[0058] Polyurethane foam absorbs heat during expansion. Therefore, when the polyurethane foam in cavity 203 is discharged to the outside, it can cool down the damaged part of the squeezed cable, reduce the risk of fire, and play a better protective role.

[0059] The main function achieved by this invention is as follows: by setting up components such as cavity 203, protrusion 305, elastic element 301, round tube 202 and cone, when the anti-extrusion cable is subjected to external compression, the elastic deformation of cavity 203 itself, the elastic element 301 and the friction between the cable core body 1 and protrusion 305 during movement are used to buffer the external pressure, thereby reducing damage to the cable core body 1. Furthermore, when the cable core body 1 passes through protrusion 305, it will generate vibration, which will help to shake the polyurethane foam in cavity 203, reducing the occurrence of sedimentation. At the same time, during the movement of cable core body 1, the cone will damage round tube 202 or the pressure valve 205 in round tube 202 will open due to excessive pressure, allowing the polyurethane foam in cavity 203 to be discharged. On the one hand, the discharged polyurethane foam can buffer, and on the other hand, the discharged polyurethane foam can expand and absorb heat, and serve as a warning, enabling maintenance personnel to quickly locate the damaged location.

[0060] Example 2

[0061] This embodiment also provides a method for preventing the extrusion of an anti-extrusion cable, comprising the following steps:

[0062] S1. When the anti-extrusion cable is bundled, packaged and transported after production, it will be subjected to the compression of the binding rope and the compression caused by vehicle shaking. The anti-extrusion cable resists compression through the characteristics of its internal structure.

[0063] S11. When the compression point during transportation is at point ①, since there is a cavity 203 between point ① and the cable core body 1, the cavity 203 at point ① will be compressed and deformed as the binding rope is tied, so as to reduce the binding pressure of the binding rope and reduce the pressure acting on the cable core body 1. As the cavity 203 at point ① is compressed and deformed, the side of the cavity 203 near the cable core body 1 will contact the cable core body 1, thereby compressing the cable core body 1. A through groove 201 is provided on the opposite side of point ①. Therefore, when the cable core body 1 is subjected to pressure in the direction of point ①, the cable core body 1 will move in the opposite direction of point ①. When the cable core body 1 moves, it will compress the elastic element 301 in the direction of movement. With the assistance of the elastic element 301, on the one hand, the stable posture of the cable core body 1 is ensured, and on the other hand, the elastic element 301 can buffer the pressure and reduce the damage to the cable core body 1 when it is compressed.

[0064] S12. If the compression position is near position ②, the compression of position ② by the binding rope will directly act on the elastic element 301 corresponding to position ②, thereby compressing the elastic element 301. With the assistance of the elastic element 301, the binding pressure of the binding rope is weakened, thereby reducing the pressure on the cable core body 1.

[0065] S13. During the transportation of the anti-extrusion cable, when the vehicle shakes, the impact of the vehicle shaking on the cable core body 1 is reduced by the assistance of the three-directional elastic elements 301 and the three-directional cavities 203, so as to avoid damage to the cable core body 1 caused by the increased binding pressure of the binding rope due to the vehicle shaking.

[0066] S2. When the compression-resistant cable is buried underground, if the pressure of passing vehicles is large or the ground is accidentally dug, the compression-resistant cable will be subjected to destructive compression under such circumstances. The compression-resistant cable resists compression by adjusting its internal structure during the compression process.

[0067] S21. If the pressure point is located at ①, the cavity 203 corresponding to ① will be squeezed and deformed. When the cable core body 1 moves away from ① due to the squeezing deformation of the cavity 203, the elastic element 301 on the opposite side of ① will buffer it. As the pressure increases, the deformation of the cavity 203 at ① will increase the internal pressure. When the internal pressure of the cavity 203 is greater than the pressure valve 205, the pressure valve 205 is opened. The polyurethane foam in the cavity 203 at ① is slowly discharged through the channel 204 in the round tube 202 on both sides of the cavity 203 at ①, thereby generating slow pressure relief in the cavity 203, thus buffering the pressure at ①. The discharged polyurethane foam reacts with the moisture in the air in the through groove 201 and expands, filling the through groove 201 on both sides of ①. On the one hand, it strengthens the structural strength of the anti-extrusion cable near the pressure point. On the other hand, the polyurethane foam filled in the through groove 201 will form a protective layer at the front end of the cable core body 1.

[0068] As the cable core body 1 passes the protrusion 305, there is friction between the protrusion 305 and the cable core body 1. The pressure on the cable core body 1 is buffered by the combined assistance of friction and elastic element 301, thereby reducing the damage to the cable core body 1 caused by the pressure. When the cable core body 1 passes the protrusion 305, the deformation and recovery of the protrusion 305 will generate slight vibrations, thereby reducing the precipitation of polyurethane foam in the cavity 203 corresponding to the protrusion 305. As the cable core body 1 continues to move, the sharp cone on the arc plate 302 in the direction of movement of the cable core body 1 will break the corresponding round tube 202, so that the polyurethane foam in the cavities 203 on both sides of the direction of movement of the cable core body 1 can be discharged through the broken round tube 202. The discharged polyurethane foam will generate resistance and buffering for the movement of the cable core body 1, further strengthening the protection of the cable core body 1.

[0069] S22. If the pressure point is located at ②, deformation will occur at ②, directly acting on the elastic element 301 corresponding to ②, thereby compressing the elastic element 301. The auxiliary pressure of the elastic element 301 is weakened, thereby reducing the pressure on the cable core body 1 and reducing the damage to the cable core body 1. As the pressure increases, the deformation at ② will gradually increase, thus increasing the degree of compression of the elastic element 301. This causes the circular tube 202 at ② to move towards the corresponding cone, thereby breaking the circular tube 202. This allows the polyurethane foam in the cavities 203 on both sides of ② to be discharged through the broken circular tube 202. The discharged polyurethane foam will fill the through groove 201 between ② and the cable core body 1 to form a buffer.

[0070] When pressure is applied to the cable core body 1 through the elastic element 301 and the arc plate 302, the cable core body 1 will move away from ②. The movement of the cable core body 1 will generate pressure on the cavity 203 on the opposite side of ② and deform it. The cavity 203 acts as a buffer in the direction of movement of the cable core body 1 to protect the cable core body 1.

[0071] S23. When the pressure applied to points ① and ② is too high, it will cause damage to points ① and ②, which will cause the polyurethane foam in cavity 203 to be discharged to the outside of the anti-extrusion cable. On the one hand, it forms protection on the outside of the anti-extrusion cable, and on the other hand, the expansion of the discharged polyurethane foam can also serve as a warning to the outside world, so that construction personnel can quickly find the location of the damage to the anti-extrusion cable for repair.

[0072] The anti-extrusion cable of the present invention can be installed, connected, or set in a common mechanical manner, and can be implemented as long as it can achieve its beneficial effects.

[0073] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0074] The above are merely preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A compression-resistant cable, comprising a cable core body, characterized in that, A protective layer is provided on the outside of the cable core body, and an anti-compression component is provided between the protective layer and the cable core body; The protective layer is provided with a through groove, and a circular tube is provided on the side of the through groove away from the cable core body. The protective layer is also provided with a cavity, and two channels are provided in the circular tube. A pressure valve is provided in the channel at the circular tube. Polyurethane foam is provided in the cavity. The anti-compression component includes an elastic element, an arc-shaped plate is provided on the elastic element, a limiting groove is provided on both sides of the through groove, a slider matching the limiting groove is provided on both sides of the arc-shaped plate, and a protrusion is provided on the side end of the through groove. A pointed cone is provided on the side of the arc-shaped plate away from the cable core body. The pointed cone is in the shape of a hexagonal screwdriver head and corresponds to the position of the round tube. The two channels are respectively connected to the cavities on both sides of the round tube.

2. The compression-resistant cable as described in claim 1, characterized in that, The elastic element is fitted onto the outside of the circular tube on the side away from the arc plate. The cross-section of the through groove is bulb-shaped. The arc plate matches the cable core body. The spacing at the narrowest point of the through groove is greater than the width of the arc plate, and the spacing at the narrowest point of the through groove is greater than the diameter of the cable core body.

3. The compression-resistant cable as described in claim 2, characterized in that, There are three through slots, and correspondingly, there are three elastic elements and three arc-shaped plates. The included angle between the three through slots is 120°, and the cable core body is located between the three arc-shaped plates.

4. The compression-resistant cable as described in claim 3, characterized in that, The cable core body includes a wire core, which is provided with multiple strands. Each wire core is wrapped with a rubber layer on the outside. The multiple wire cores are provided with an insulating sheath on the outside. The insulating sheath is provided with a braided mesh layer on the outside. The braided mesh layer is provided with a cable outer sheath on the outside. The braided mesh layer is filled with mineral filler.

5. The compression-resistant cable as described in claim 4, characterized in that, The surface of the protrusion is rough and elastic. The distance between the protrusions on both sides of the through groove is greater than the width of the arc plate, and the distance between the protrusions on both sides of the through groove is less than the diameter of the cable core body.

6. A method for resisting compression of a compression-resistant cable as described in claim 1, characterized in that, Includes the following steps: S1. When the anti-compression cable is bundled, packaged and transported after production, it resists compression through the characteristics of its internal structure. S2. When the compression-resistant cable is buried underground, it resists compression by adjusting its internal structure during the compression process.

7. The cable compression resistance method as described in claim 6, characterized in that, The specific anti-compression method in step S1 includes the following steps: S11. When the compression point during transportation is at the first position, the cavity at the first position will be compressed and deformed to reduce the binding pressure of the binding rope. When the cable core body is subjected to pressure in the direction of the first position, the cable core body will move in the opposite direction to the first position. When the cable core body moves, the elastic element can buffer the pressure and reduce the damage to the cable core body when it is compressed. S12. If the compression position is near the second position, the binding pressure of the binding rope is weakened by the assistance of the elastic element, thereby reducing the pressure on the cable core body. S13. During the transportation of the anti-extrusion cable, the impact of vehicle swaying on the cable core body is reduced by the assistance of three-directional elastic elements and three-directional cavities.

8. The cable compression resistance method as described in claim 7, characterized in that, The specific anti-compression method in step S2 includes the following steps: S21. If the pressure point is located at the first position, the elastic element on the opposite side of the first position will generate a buffer. As the pressure increases, the pressure valve is opened, and the polyurethane foam in the cavity at the first position is slowly discharged through the channels in the round tubes on both sides of the cavity at the first position, thereby generating slow pressure relief in the cavity. The discharged polyurethane foam strengthens the structural strength of the anti-extrusion cable near the pressure point on the one hand, and on the other hand, the polyurethane foam filled in the through groove will form a protective layer at the front end of the cable core body. S22. If the pressure point is located at the second position, deformation will occur at the second position. The auxiliary pressure of the elastic element will be weakened. As the pressure increases, the deformation at the second position will gradually increase, causing the round tube at the second position to move towards the corresponding cone, thereby causing the round tube to be destroyed. This allows the polyurethane foam in the cavities on both sides of the second position to be discharged through the destroyed round tube. The discharged polyurethane foam will fill the through groove between the second position and the cable core body to form a buffer. S23. When the pressure applied at the first and second positions is too high, it will cause damage to the first and second positions, which will cause the polyurethane foam in the cavity to be discharged to the outside of the compression-resistant cable. On the one hand, it forms protection on the outside of the compression-resistant cable, and on the other hand, the expansion of the discharged polyurethane foam can also serve as a warning to the outside world.

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