A cable resistant to mechanical damage

Abstract

The present invention relates to the technical field related to cables, and discloses a mechanical damage-resistant cable, comprising an outer sheath tube and several cable cores, wherein the inner wall of the outer sheath tube is provided with a protective layer, the inner wall of the protective layer is provided with a support layer, the inner wall of the support layer is provided with a support bar, one end of the support bar is provided with a pressure head, a flexible inner sheath tube is provided between the several pressure heads and the several cable cores, and a first buffer component is provided inside the inner sheath tube; the present invention can maintain the basic rigidity of the cable through the support bar, and cooperate with the second buffer component in the protective layer, the buffer material in the inner sheath tube, and the first buffer component to make it have better flexibility when not squeezed; when it is squeezed from the outside, the cable core and the pressure head are close to each other and the external force required for bending is increased, thereby improving its rigidity when subjected to external force, reducing the curvature of the bendable cable at the clamping part, and avoiding the reduction of mechanical properties and damage to each material layer caused by a large bending curvature.

Description

Technical Field

[0001] The present invention belongs to the technical field related to cables, and more particularly, relates to a mechanical damage-resistant cable. Background Art

[0002] Cables are typically made up of several or several groups of wires twisted together into a rope-like cable. Each group of wires is insulated from each other and often twisted around a central core. The entire cable is covered with a highly insulating coating. Currently, cable quality requirements are constantly increasing. Cables are required to not only have excellent high-temperature resistance and anti-breakage capabilities, but also have strong resistance to mechanical damage and other properties. Among them, mechanical damage resistance refers to the ability of cables to resist external mechanical forces without being damaged or with minimal damage. These mechanical external forces include tension, compression, bending, torsion, shearing and other forms. However, cables in the prior art have the following defects:

[0003] 1. In the existing technology, the steel strands of the cable are generally arranged at the axis of the cable, which has certain advantages from the perspective of production, but has certain shortcomings in terms of resistance to mechanical damage. This is mainly because when the cable is subjected to external mechanical tension, the steel strands located at the axis and the filling material outside it are easily misaligned, and part of the tension is transferred to the cable core outside the steel strands, causing damage to the cable core;

[0004] 2. In the prior art, when cables are laid in pipe corridors, underground pipe corridors, and underground burials, they need to be fixed at multiple points during their large-scale laying process. In particular, at locations where the cable pulling direction changes, the cables need to be fixed with clamps and other fasteners. The stirrups at the locations where the cables are bent are particularly susceptible to damage due to stress concentration, wrinkles, wear, and the like. The bending locations are more prone to aging than other locations, which also aggravates the damage at these locations. Therefore, existing cables may suffer from severe damage at the bending locations during construction, causing the cables to fail to achieve the expected service life and performance. Moreover, cables laid underground and in pipe corridors are relatively inconvenient to inspect and maintain, which has a negative impact on power supply and power supply safety.

[0005] 3. In the existing technology, the cable itself is a heat source, and its thermal performance is particularly important. Heat collection and high temperature will accelerate its aging and reduce its mechanical properties. The thermal expansion of the material will damage the outer coating of the material and cause the loosening of the filling materials and the wiring harness. Therefore, the thermal performance of the cable also reflects the mechanical performance of the cable from the side.

[0006] Therefore, in view of this, research and improvement are conducted on the existing structure and defects to provide a mechanical damage resistant cable in order to achieve a more practical and valuable purpose. Summary of the Invention

[0007] The present invention provides a mechanical damage resistant cable, which is used to overcome the above-mentioned defects in the prior art.

[0008] The purpose and effect of the mechanical damage resistant cable of the present invention are achieved by the following specific technical means:

[0009] A mechanical damage resistant cable, comprising an outer sheath tube and several cable cores, wherein the inner wall of the outer sheath tube is provided with a protective layer, the protective layer is an airbag structure, the interior of the protective layer is filled with a mixture of CO2 and N2, the inner wall of the protective layer is provided with a support layer, the inner wall of the support layer is fixed with a plurality of support bars in a circumferential array, one end of each support bar is fixed with a pressure head, a flexible inner sheath tube is provided between the pressure heads and the cable cores, the inner sheath tube is provided with an outer convex covering portion adapted to the cable core, the inner sheath tube is provided with an inner concave covering portion adapted to the pressure head, and a surrounding convex covering portion is provided between adjacent support bars. In the heat dissipation area of the covering part, the outside of each cable core is wrapped with a shielding layer, the inside of the inner sheath tube is filled with buffer material, the inside of the inner sheath tube is provided with a first buffer component, and the inside of the protective layer is provided with a second buffer component; the first buffer component includes a reinforcing rib, the reinforcing rib is located in the middle of the inner sheath tube, the cross-section of the reinforcing rib is a triangular structure, and a first V-shaped groove is provided on each of the three surfaces of the reinforcing rib, a first V-shaped elastic part is connected between each two adjacent concave covering parts, and a spring is provided to connect the middle part of each first V-shaped elastic part and the inside of the first V-shaped groove.

[0010] A further technical solution is that the two ends of each first V-shaped elastic member are respectively fixedly connected to the inner walls of the two adjacent concave covering parts, and a slide groove is provided on the three corners of the reinforcing rib, and a push plate is provided for sliding inside each slide groove, and one end of each push plate is connected to the inner wall of the concave covering part, and the other end of each push plate is interconnected with the inside of the slide groove. A first hollow elastic member is provided, and each first hollow elastic member has a diamond structure, and a push rod is fixed on the inclined surfaces on both sides of each first hollow elastic member, and a wear-resistant member is fixed at one end of each push rod, and one side of each wear-resistant member is in friction contact with one side of the middle part of the first V-shaped elastic member, and several of the convex covering parts and the concave covering parts are staggered.

[0011] A further technical solution is that the second buffer assembly includes a plurality of first movable blocks and a plurality of second movable blocks, wherein the plurality of first movable blocks are distributed in a circular array on the outer side wall inside the protective layer, and the plurality of second movable blocks are distributed in a circular array on the inner side wall inside the protective layer, and each of the first movable blocks is provided with a second V-shaped groove on the side facing the second movable block, and a V-shaped wear-resistant layer is fixedly provided on the inner wall of the second V-shaped groove, and both sides of the second movable block are in a sloped structure, and both sides of the second movable block are in friction contact with the two side wall slopes of the V-shaped wear-resistant layer respectively.

[0012] A further technical solution is that both sides of each of the first movable blocks are inclined structures, and the inner wall inside the protective layer is provided with several pairs of arc-shaped grooves, each pair of the arc-shaped grooves is symmetrically distributed on both sides of the second movable block, and two sliders are slidingly provided in each pair of the arc-shaped grooves, and a rotating plate is rotatably provided on the inclined surface on the side where the two sliders are close to each other.

[0013] According to a further technical solution, a plurality of first elastic protrusions are provided at intervals on the side close to each other of each pair of rotating plates, and a plurality of second elastic protrusions are provided at intervals on the inclined surfaces on both sides of each first movable block, and each pair of first elastic protrusions is respectively squeezed and contacted with each pair of second elastic protrusions.

[0014] A further technical solution is that a second V-shaped elastic part is connected between each corresponding two sliders, and the two ends of each second V-shaped elastic part are respectively connected to the corresponding two sliders, one side of the middle part of each second V-shaped elastic part is in contact with the outer wall inside the protective layer, and a second hollow elastic part is connected between the other side of the middle part of each second V-shaped elastic part and the inner wall inside the protective layer.

[0015] According to a further technical solution, the inclined upper end of each rotating plate is rotatably connected to one side of the slider, and a third hollow elastic member is connected between the inclined lower end of each rotating plate and one side of the slider.

[0016] According to a further technical solution, the interior of each of the third hollow elastic members and the interior of each of the second hollow elastic members are interconnected and a telescopic connecting pipe is provided.

[0017] According to a further technical solution, the interior of each of the pressure heads is wrapped with steel strands, and each of the support bars and the pressure head are made of polyvinyl chloride material.

[0018] According to a further technical solution, the inner sheath tube is made of rubber material, and the buffer material is made of polyethylene foam material.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides a mechanical damage-resistant cable. Through the arrangement of a first movable block, a second V-shaped groove, a V-shaped wear-resistant layer, a second movable block, and a protective layer, the outer sheath tube transmits external mechanical action to the protective layer and the second buffer assembly. The outer wall inside the protective layer is acted upon by a force, pushing the first movable block to move closer to the second movable block, thereby causing one end of the second movable block to enter the second V-shaped groove. The inclined surfaces on both sides of the second movable block respectively come into frictional contact with the inner side walls of the V-shaped wear-resistant layer, thereby providing frictional buffering for the radial inward movement of the first movable block. Furthermore, through the arrangement of a slider, a first elastic protrusion, and a second elastic protrusion, the radial inward movement of the first movable block drives the movement of several pairs of second elastic protrusions. The several pairs of second elastic protrusions respectively come into squeeze contact with several pairs of first elastic protrusions on the two opposite sliders, thereby providing buffering for the outside of the first movable block. This is beneficial for providing internal and external dual buffering for the first movable block, thereby improving the resistance of the second buffer assembly to external mechanical forces.

[0021] The present invention provides a mechanical damage-resistant cable. By disposing a second V-shaped elastic member, a first movable block moves radially inward to squeeze the middle portion of the second V-shaped elastic member, thereby bending and deforming the second V-shaped elastic member in both directions, increasing the distance between the two ends of the second V-shaped elastic member so as to move the corresponding two sliders away from each other, thereby bringing the two opposing sliders closer together. The two opposing sliders slide relative to each other within two symmetrical arc-shaped grooves, and the two opposing sliders approach each other, thereby bringing several pairs of first elastic protrusions closer together, gradually reducing the distance between the several pairs of first elastic protrusions and the several pairs of second elastic protrusions, gradually increasing the contact area between the first elastic protrusions and the second elastic protrusions, and improving the buffering effect between the several pairs of first elastic protrusions and the several pairs of second elastic protrusions. Then, through the arrangement of the second hollow elastic member, the telescopic connecting tube, the third hollow elastic member, and the rotating plate, the relative expansion of the two third hollow elastic members pushes the two rotating plates to rotate, and the rotation of the two rotating plates drives the movement of several pairs of first elastic protrusions, so as to further gradually reduce the distance between the several pairs of first elastic protrusions and the several pairs of second elastic protrusions, further gradually increase the contact area between the first elastic protrusions and the second elastic protrusions, further improve the buffering effect between the several pairs of first elastic protrusions and the several pairs of second elastic protrusions, thereby further improving the resistance of the second buffer assembly to external mechanical forces.

[0022] The present invention provides a mechanical damage-resistant cable. By configuring an inner concave covering, a reinforcing rib, a first V-shaped groove, a first V-shaped elastic member, and a spring, three pressure heads move radially inward to squeeze the three inner concave coverings, squeezing both ends of the three first V-shaped elastic members so that the middle portion of the first V-shaped elastic member enters the first V-shaped groove. The middle portion of the first V-shaped elastic member moves within the first V-shaped groove, compressing the spring. The spring compression generates an elastic force, which acts on the middle portion of the first V-shaped elastic member, thereby causing the first buffer assembly to buffer the pressure head. Furthermore, by configuring a push plate, a first hollow elastic member, a push rod, and a wear-resistant member, the three inner concave coverings are squeezed, causing the three push plates to move radially inward. The radial inward movement of the three push plates squeezes and deforms the three first hollow elastic members. The deformation of the first hollow elastic members pushes the two push rods away from each other, which in turn drives the corresponding two wear-resistant members away from each other, thereby bringing the two opposing wear-resistant members located on either side of the first V-shaped groove closer together. The two relatively wear-resistant parts are close to each other and in frictional contact with both sides of the middle part of the first V-shaped elastic part, so as to gradually increase the friction between the wear-resistant parts and the first V-shaped elastic part, so as to improve the buffering effect of the first buffer assembly on the pressure head.

[0023] The mechanical damage-resistant cable of the present invention maintains the basic rigidity of the cable through the support bar, and cooperates with the second buffer component in the protective layer, the buffer material in the inner sheath tube, and the first buffer component to make it have good flexibility when not squeezed; when it is squeezed by the outside, the cable core and the pressure head are close to each other and the external force required for bending is increased, which improves its rigidity when subjected to external force, and reduces the curvature of the bend in the clamping part, avoiding the reduction of mechanical performance and damage to each material layer caused by a large bending curvature. By changing the characteristic that the traditional cable core is located in the center of the cable, the cable core is placed away from the center of the cable. On the one hand, it is convenient to dissipate heat and improve its elasticity of bending and reset. On the other hand, it can increase the distance between adjacent cable cores and reduce mutual interference between cable cores. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] The present invention will be further described below with reference to the accompanying drawings and examples.

[0026] Figure 1 It is an isometric structural diagram of the present invention;

[0027] Figure 2Schematic diagram of the isometric structure of the inner sheath tube in the present invention;

[0028] Figure 3 This is a first cross-sectional structural diagram of Example 1 of the present invention;

[0029] Figure 4 This is a second cross-sectional structural diagram of Example 1 of the present invention;

[0030] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at A in the middle;

[0031] Figure 6 for Figure 4 Schematic diagram of the local enlarged structure at B in the middle;

[0032] Figure 7 for Figure 6 Schematic diagram of the local enlarged structure at C in the middle;

[0033] Figure 8 It is a schematic cross-sectional structural diagram of Example 2 of the present invention.

[0034] Description of reference numerals:

[0035] Outer sheath tube 10, protective layer 11, supporting layer 12, inner sheath tube 13, outer convex covering portion 14, inner concave covering portion 15, shielding layer 16, cable core 17, support bar 18, pressure head 19, steel strand 20, buffer material 21, reinforcing rib 22, first V-shaped groove 23, first V-shaped elastic member 24, push plate 25, slide groove 26, first hollow elastic member 27, push rod 28, wear-resistant member 29, spring 30, first movable block 31, second V-shaped groove 32, V-shaped wear-resistant layer 33, second movable block 34, second V-shaped elastic member 35, second hollow elastic member 36, slider 37, arc-shaped slide groove 38, rotating plate 39, first elastic protrusion 40, third hollow elastic member 41, telescopic connecting tube 42, second elastic protrusion 43, heat dissipation area 44, airbag 45. DETAILED DESCRIPTION

[0036] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0037] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] As attached Figure 1 To the attached Figure 7 As shown:

[0040] The present invention provides a mechanical damage resistant cable.

[0041] Example 1

[0042] Refer to the attached Figure 1 To the attached Figure 7, including an outer sheath tube 10 and several cable cores 17, the inner wall of the outer sheath tube 10 is provided with a protective layer 11, the protective layer 11 is an airbag structure, the interior of the protective layer 11 is filled with a mixture of CO2 and N2, the inner wall of the protective layer 11 is provided with a support layer 12, the inner wall of the support layer 12 is fixed with a plurality of support bars 18 in a circular array, one end of each support bar 18 is fixed with a pressure head 19, a flexible inner sheath tube 13 is provided between the pressure heads 19 and the cable cores 17, the inner sheath tube 13 is provided with an outer convex covering portion 14 adapted to the cable core 17, the inner sheath tube 13 is provided with an inner concave covering portion 15 adapted to the pressure head 19, and a surrounding outer convex covering portion is provided between adjacent support bars 18. The heat dissipation area 44 of the covering portion 14, the outside of each cable core 17 is wrapped with a shielding layer 16, the inside of the inner sheath tube 13 is filled with a buffer material 21, the inside of the inner sheath tube 13 is provided with a first buffer component, and the inside of the protective layer 11 is provided with a second buffer component; the first buffer component includes a reinforcing rib 22, the reinforcing rib 22 is located in the middle of the inner sheath tube 13, the cross-section of the reinforcing rib 22 is a triangular structure, and a first V-shaped groove 23 is provided on the three surfaces of the reinforcing rib 22, and a first V-shaped elastic part 24 is connected between each adjacent two concave covering portions 15, and a spring 30 is interconnected between the middle part of each first V-shaped elastic part 24 and the inside of the first V-shaped groove 23.

[0043] Preferably, refer to the attached Figure 1 To the attached Figure 5 The two ends of each first V-shaped elastic member 24 are respectively fixedly connected to the inner walls of the two adjacent concave covering portions 15, and a slide groove 26 is provided on the three corners of the reinforcing rib 22. A push plate 25 is provided for sliding inside each slide groove 26, and one end of each push plate 25 is connected to the inner wall of the concave covering portion 15, and the other end of each push plate 25 is connected to the inside of the slide groove 26. A first hollow elastic member 27 is interconnected, and each first hollow elastic member 27 has a diamond structure. A push rod 28 is fixed on the inclined surfaces on both sides of each first hollow elastic member 27, and a wear-resistant member 29 is fixed at one end of each push rod 28. One side of each wear-resistant member 29 is in friction contact with one side of the middle part of the first V-shaped elastic member 24, and several convex covering portions 14 and concave covering portions 15 are staggered.

[0044] Preferably, refer to the attached Figure 6 The second buffer assembly includes a plurality of first movable blocks 31 and a plurality of second movable blocks 34. The plurality of first movable blocks 31 are distributed in a circular array on the outer side wall inside the protective layer 11, and the plurality of second movable blocks 34 are distributed in a circular array on the inner side wall inside the protective layer 11. Each first movable block 31 is provided with a second V-shaped groove 32 on one side facing the second movable block 34. A V-shaped wear-resistant layer 33 is fixedly provided on the inner wall of the second V-shaped groove 32. Both sides of the second movable block 34 are inclined structures, and both sides of the second movable block 34 are in friction contact with the two side wall inclined surfaces of the V-shaped wear-resistant layer 33 respectively.

[0045] Preferably, refer to the attached Figure 6 To the attached Figure 7 Both sides of each first movable block 31 are inclined structures, and the inner wall inside the protective layer 11 is provided with several pairs of arc-shaped slide grooves 38. Each pair of arc-shaped slide grooves 38 is symmetrically distributed on both sides of the second movable block 34. Two sliders 37 are slidably provided in each pair of arc-shaped slide grooves 38, and a rotating plate 39 is rotatably provided on the inclined surface on the side where the two sliders 37 are close to each other.

[0046] Preferably, refer to the attached Figure 6 To the attached Figure 7 A plurality of first elastic protrusions 40 are provided at intervals on the side close to each other of each pair of rotating plates 39, and a plurality of second elastic protrusions 43 are provided at intervals on the inclined surfaces on both sides of each first movable block 31. Each pair of first elastic protrusions 40 is in compression contact with each pair of second elastic protrusions 43 respectively.

[0047] Preferably, refer to the attached Figure 6 To the attached Figure 7 A second V-shaped elastic member 35 is connected between each corresponding slider 37, and the two ends of each second V-shaped elastic member 35 are respectively connected to the corresponding two sliders 37. One side of the middle part of each second V-shaped elastic member 35 contacts the outer wall inside the protective layer 11, and a second hollow elastic member 36 is connected between the other side of the middle part of each second V-shaped elastic member 35 and the inner wall inside the protective layer 11.

[0048] Preferably, refer to the attached Figure 6 To the attached Figure 7 The inclined upper end of each rotating plate 39 is rotatably connected to one side of the slider 37 , and a third hollow elastic member 41 is connected between the inclined lower end of each rotating plate 39 and one side of the slider 37 .

[0049] Preferably, refer to the attached Figure 6 To the attached Figure 7 The interior of each third hollow elastic member 41 and the interior of each second hollow elastic member 36 are connected to each other and a telescopic connecting pipe 42 is provided.

[0050] Preferably, refer to the attached Figure 1 To the attached Figure 7 Each pressure head 19 is wrapped with a steel strand 20, and each support bar 18 and pressure head 19 are made of polyvinyl chloride material.

[0051] Preferably, refer to the attached Figure 1 To the attached Figure 7 The inner sheath tube 13 is made of rubber material, and the buffer material 21 is made of polyethylene foam material.

[0052] Example 2

[0053] Refer to the attached Figure 8 In this embodiment, the second buffer assembly includes a plurality of airbags 45 located within the protective layer 11. The airbags 45 are filled with a mixture of CO2 and N2. This has significant advantages in improving the cable's resistance to mechanical damage, stability, and reducing maintenance costs.

[0054] Specific use of the present invention:

[0055] When the cable is subjected to external mechanical action, especially when it is subjected to clamp-type encircling extrusion, since there is a certain gap between the outer wall of the cable core 17 and the inner wall of the outer sheath tube 10, and the second buffer component in the protective layer 11 has a certain compression space and the protective layer 11 is an airbag structure, it can resist the external extrusion force and avoid damage to the cable core 17. Among them, the protective layer 11 is filled with a mixed gas of CO2 and N2, which has significant advantages in improving the cable's resistance to mechanical damage, stability and reducing maintenance costs. Mixing CO2 and N2 in a certain proportion and filling them into the protective layer 11 can combine the advantages of both. This mixed gas can not only maintain the hardness and pressure resistance of the airbag, but also reduce the weight of the cable and improve thermal stability and electrical insulation.

[0056] First, the outer sheath tube 10 is subjected to external mechanical action, and the outer sheath tube 10 transmits the external mechanical action to the protective layer 11 and the second buffer assembly. The outer wall inside the protective layer 11 is acted upon by force, pushing the first movable block 31 to move close to the second movable block 34, so that one end of the second movable block 34 enters the second V-shaped groove 32, and the inclined surfaces on both sides of the second movable block 34 respectively make frictional contact with the inner side walls of the V-shaped wear-resistant layer 33, thereby performing a friction buffering effect on the radial inward movement of the first movable block 31.

[0057] Simultaneously, the radially inward movement of the first movable block 31 drives the movement of the pairs of second elastic protrusions 43. These pairs of second elastic protrusions 43 engage the pairs of first elastic protrusions 40 on the two opposing sliders 37, thereby providing a buffering effect on the exterior of the first movable block 31. This facilitates dual internal and external buffering of the first movable block 31, enhancing the second buffer assembly's resistance to external mechanical forces. The two sliders 37 on either side of the second V-shaped elastic member 35 are referred to as the corresponding sliders 37. The sides of the corresponding sliders 37 that approach each other are flat, and the two ends of the second V-shaped elastic member 35 are connected to the sides of the corresponding sliders 37 that approach each other. The two sliders 37 on either side of the first movable block 31 are referred to as the opposing sliders 37. The sides of the opposing sliders 37 that approach each other are inclined.

[0058] Next, the first movable block 31 moves radially inward, squeezing the middle portion of the second V-shaped elastic member 35, thereby bending and deforming the second V-shaped elastic member 35 toward both ends. This increases the distance between the two ends of the second V-shaped elastic member 35, thereby moving the two corresponding sliders 37 away from each other and, therefore, bringing the two opposing sliders 37 closer together. The two opposing sliders 37 slide toward each other within the two symmetrical arc-shaped slots 38, respectively. As a result, the two opposing sliders 37 approach each other, thereby bringing the pairs of first elastic protrusions 40 closer together. This gradually reduces the distance between the pairs of first elastic protrusions 40 and the pairs of second elastic protrusions 43, gradually increasing the contact area between the first elastic protrusions 40 and the second elastic protrusions 43, and enhancing the cushioning effect between the pairs of first elastic protrusions 40 and the pairs of second elastic protrusions 43.

[0059] At the same time, the middle portion of the second V-shaped elastic member 35 moves radially inward, squeezing the second hollow elastic member 36. This allows the gas within the second hollow elastic member 36 to enter the corresponding two third hollow elastic members 41 through the two telescopic connecting tubes 42, thereby causing the corresponding two third hollow elastic members 41 to expand. Furthermore, the expansion of the two third hollow elastic members 41 drives the two rotating plates 39 to rotate. The rotation of the two rotating plates 39 drives the multiple pairs of first elastic protrusions 40 to move, thereby further gradually reducing the distance between the multiple pairs of first elastic protrusions 40 and the multiple pairs of second elastic protrusions 43. This gradually increases the contact area between the multiple pairs of first elastic protrusions 40 and the multiple pairs of second elastic protrusions 43, further enhancing the buffering effect between the multiple pairs of first elastic protrusions 40 and the multiple pairs of second elastic protrusions 43, and thereby further improving the second buffer assembly's resistance to external mechanical forces.

[0060] Next, the external mechanical force exerted on the protective layer 11 and the second buffer assembly is transferred to the support layer 12 , and the support layer 12 transfers the mechanical force to the support bar 18 and the pressing head 19 , and the pressing head 19 presses the concave covering portion 15 and the first buffer assembly. When the pressure head 19 squeezes the first buffer assembly, the first buffer assembly has a certain compression space, causing the cable core 17 and the pressure head 19 to gather toward the center of the cable. After the cable core 17 and the pressure head 19 gather toward the center of the cable, the extrusion gap between the cable core 17 and the pressure head 19 is reduced, and the cable core 17 and the inner sheath tube 13, as well as the pressure head 19 and the inner sheath tube 13, are all in a compressed state. This is equivalent to increasing the connection strength of the cable core 17, the inner sheath tube 13, and the pressure head 19. The avoidance gap required for cable bending is reduced, and the bending resistance of the cable is increased. From the perspective of the entire cable, not only the connection strength of the cable core 17, the inner sheath tube 13, and the pressure head 19 is increased, but also the outer sheath tube 10 and the cable core 17 are in a compressed state, and the resistance that needs to be overcome by bending the cable is also increased. Among them, the rigidity of the cable can be increased when subjected to external pressure. When the cable is bent, the components on both the inner and outer bend sides are compressed against each other, thereby improving the rigidity of the part.

[0061] At the same time, when the cable is subjected to external compression, especially when subjected to clamp-type encircling compression, the pressing heads 19 are all gathered toward the center of the cable, and the three pressing heads 19 move radially inward to compress the three inwardly concave covering portions 15 respectively. The compression of the three inwardly concave covering portions 15 causes both ends of the three first V-shaped elastic members 24 to be compressed, so that the middle portion of the first V-shaped elastic member 24 enters the first V-shaped groove 23. The middle portion of the first V-shaped elastic member 24 moves within the first V-shaped groove 23, compressing the spring 30. The compression of the spring 30 generates an elastic force, which acts on the middle portion of the first V-shaped elastic member 24, thereby causing the first buffer assembly to provide a buffering effect on the pressing head 19.

[0062] At the same time, the three concave covering portions 15 are squeezed, causing the three push plates 25 to move radially inward. The radial inward movement of the three push plates 25 squeezes and deforms the three first hollow elastic members 27 respectively. The deformation of the first hollow elastic member 27 pushes the two push rods 28 away from each other. The two push rods 28 move away from each other, driving the corresponding two wear-resistant members 29 away from each other, thereby bringing the two relative wear-resistant members 29 located on both sides of the first V-shaped groove 23 closer to each other. The two relative wear-resistant members 29 approach each other and make frictional contact with the middle of the first V-shaped elastic member 24 on both sides, so as to gradually increase the friction between the wear-resistant members 29 and the first V-shaped elastic member 24, so as to improve the buffering effect of the first buffer assembly on the pressure head 19. Among them, the two wear-resistant members 29 located on both sides of the first hollow elastic member 27 are called corresponding two wear-resistant members 29, and the two wear-resistant members 29 located on the two side walls of the first V-shaped groove 23 are called relative two wear-resistant members 29.

[0063] Finally, when the cable is squeezed by external force, although the rigidity increases because the various components of the cable squeeze each other, resulting in an increase in its bending resistance, the cable core 17 is still well protected under the squeeze state of each part, the heat dissipation area 44 still exists, and it is connected with the heat dissipation area 44 of the non-extruded part, and the overall performance of the cable will not change significantly due to pressure. Among them, the basic rigidity of the cable is maintained by the support bar 18, and the second buffer component in the protective layer 11, the buffer material 21 in the inner sheath tube 13, and the first buffer component are combined to make it have good flexibility when not squeezed; when it is squeezed by the outside, the cable core 17 and the pressure head 19 are close to each other, and the external force required for bending is increased, which improves its rigidity when subjected to external force, and reduces the curvature of the bend in the tightening part, avoiding the reduction of mechanical performance and damage to the various material layers caused by the large bending curvature. By changing the characteristic that the traditional cable core 17 is located in the center of the cable, the cable core 17 is placed away from the center of the cable. On the one hand, it is convenient for heat dissipation and improves its bending and restoring elasticity. On the other hand, it can increase the distance between adjacent cable cores 17 and reduce mutual interference between the cable cores 17.

[0064] A mechanical damage-resistant cable of the present invention has a first movable block 31, a second V-shaped groove 32, a V-shaped wear-resistant layer 33, a second movable block 34, and a protective layer 11. The outer sheath tube 10 transmits external mechanical action to the protective layer 11 and the second buffer assembly. The outer wall inside the protective layer 11 is acted upon by a force, pushing the first movable block 31 to move closer to the second movable block 34, so that one end of the second movable block 34 enters the second V-shaped groove 32. The inclined surfaces on both sides of the second movable block 34 are in frictional contact with the inner side walls of the V-shaped wear-resistant layer 33 respectively, thereby performing a friction buffering effect on the radial inward movement of the first movable block 31. Through the arrangement of the slider 37, the first elastic protrusion 40, and the second elastic protrusion 43, the radial inward movement of the first movable block 31 drives the movement of several pairs of second elastic protrusions 43. The several pairs of second elastic protrusions 43 are respectively squeezed and contacted with several pairs of first elastic protrusions 40 on the two opposite sliders 37, thereby buffering the outside of the first movable block 31, which is beneficial to the double internal and external buffering of the first movable block 31, and improves the resistance of the second buffer component to external mechanical forces.

[0065] The present invention provides a mechanical damage-resistant cable. By disposing a second V-shaped elastic member 35, the first movable block 31 moves radially inward to squeeze the middle portion of the second V-shaped elastic member 35, thereby bending and deforming the second V-shaped elastic member 35 in both directions. This increases the distance between the two ends of the second V-shaped elastic member 35, thereby moving the corresponding two sliders 37 away from each other and, therefore, bringing the two opposing sliders 37 closer together. The opposing sliders 37 slide relative to each other within two symmetrical arcuate slots 38, bringing the two opposing sliders 37 closer together, thereby bringing the pairs of first elastic protrusions 40 closer together. This gradually reduces the distance between the pairs of first elastic protrusions 40 and the pairs of second elastic protrusions 43, gradually increasing the contact area between the first elastic protrusions 40 and the second elastic protrusions 43, and improving the buffering effect between the pairs of first elastic protrusions 40 and the pairs of second elastic protrusions 43. Then, through the arrangement of the second hollow elastic member 36, the telescopic connecting tube 42, the third hollow elastic member 41, and the rotating plate 39, the relative expansion of the two third hollow elastic members 41 pushes the two rotating plates 39 to rotate, and the rotation of the two rotating plates 39 drives the several pairs of first elastic protrusions 40 to move, so as to further gradually reduce the distance between the several pairs of first elastic protrusions 40 and the several pairs of second elastic protrusions 43, thereby gradually increasing the contact area between the first elastic protrusions 40 and the second elastic protrusions 43, further improving the buffering effect between the several pairs of first elastic protrusions 40 and the several pairs of second elastic protrusions 43, thereby further improving the resistance of the second buffer assembly to external mechanical forces.

[0066] The mechanical damage-resistant cable of the present invention comprises an inner concave covering portion 15, a reinforcing rib 22, a first V-shaped groove 23, a first V-shaped elastic member 24, and a spring 30. Three pressing heads 19 move radially inward to squeeze the three inner concave covering portions 15, squeezing both ends of the three first V-shaped elastic members 24 so that the middle portion of the first V-shaped elastic member 24 enters the first V-shaped groove 23. The middle portion of the first V-shaped elastic member 24 moves within the first V-shaped groove 23, compressing the spring 30. The compression of the spring 30 generates an elastic force, which acts on the middle portion of the first V-shaped elastic member 24, thereby causing the first buffer assembly to provide a buffering effect on the pressing head 19. Furthermore, through the arrangement of the push plate 25, the first hollow elastic member 27, the push rod 28, and the wear-resistant member 29, the three inner concave covering portions 15 are squeezed, causing the three push plates 25 to move radially inward. The three push plates 25 move radially inward, squeezing and deforming the three first hollow elastic members 27. The deformation of the first hollow elastic members 27 pushes the two push rods 28 away from each other. The distance between the two push rods 28 drives the corresponding two wear-resistant members 29 away from each other, thereby bringing the two opposing wear-resistant members 29 located on either side of the first V-shaped groove 23 closer together. The two opposing wear-resistant members 29 approach each other, frictionally contacting the middle of the first V-shaped elastic member 24, thereby gradually increasing the friction between the wear-resistant members 29 and the first V-shaped elastic member 24, thereby enhancing the first buffer assembly's buffering effect on the pressure head 19.

[0067] The present invention is a mechanical damage resistant cable, which maintains the basic rigidity of the cable through the support bar 18, cooperates with the second buffer component in the protective layer 11, the buffer material 21 in the inner sheath tube 13, and the first buffer component, so that it has good flexibility when not squeezed; when it is squeezed by the outside, because the cable core 17 and the pressure head 19 are close to each other and concentrated, the external force required for bending increases, which improves its rigidity when subjected to external force, and reduces the curvature of the bend in the clamping part, avoiding the reduction of mechanical performance and damage to each material layer caused by a large bending curvature. By changing the characteristic that the traditional cable core 17 is located in the center of the cable, the cable core 17 is placed away from the center of the cable. On the one hand, it is convenient to dissipate heat and improve its elasticity of bending and reset. On the other hand, it can increase the distance between adjacent cable cores 17 and reduce mutual interference between cable cores 17.

[0068] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A mechanical damage resistant cable, characterized in that: The invention comprises an outer sheath tube (10) and a plurality of cable cores (17). The inner wall of the outer sheath tube (10) is provided with a protective layer (11). The protective layer (11) is an airbag structure. The interior of the protective layer (11) is filled with a mixed gas of CO2 and N2. The inner wall of the protective layer (11) is provided with a support layer (12). The inner wall of the support layer (12) is fixed with a plurality of support bars (18) in a circumferential array. A pressure head (19) is fixed at one end of each support bar (18). A flexible inner sheath tube (17) is provided between the plurality of pressure heads (19) and the plurality of cable cores (17). 13), the inner sheath tube (13) is provided with an outer convex covering portion (14) adapted to the cable core (17), the inner sheath tube (13) is provided with an inner concave covering portion (15) adapted to the pressure head (19), a heat dissipation area (44) surrounding the outer convex covering portion (14) is provided between adjacent support bars (18), the outside of each cable core (17) is wrapped with a shielding layer (16), the inside of the inner sheath tube (13) is filled with a buffer material (21), the inside of the inner sheath tube (13) is provided with a first buffer component, and the inside of the protective layer (11) is provided with a second buffer component; The first buffer assembly includes a reinforcing rib (22), the reinforcing rib (22) is located in the middle of the inner sheath tube (13), the cross section of the reinforcing rib (22) is a triangular structure, a first V-shaped groove (23) is provided on each of the three surfaces of the reinforcing rib (22), a first V-shaped elastic member (24) is connected between each two adjacent inner concave covering portions (15), and a spring (30) is connected between the middle portion of each first V-shaped elastic member (24) and the inside of the first V-shaped groove (23); The two ends of each first V-shaped elastic member (24) are respectively fixedly connected to the inner walls of the two adjacent concave covering parts (15), and a slide groove (26) is provided on the three corners of the reinforcing rib (22), and a push plate (25) is provided for sliding inside each slide groove (26), and one end of each push plate (25) is connected to the inner wall of the concave covering part (15), and the other end of each push plate (25) is connected to the inside of the slide groove (26) with a first hollow elastic member (27), and each first hollow elastic member (27) has a diamond structure, and a push rod (28) is fixedly provided on the inclined surfaces on both sides of each first hollow elastic member (27), and a wear-resistant member (29) is fixedly provided at one end of each push rod (28), and one side of each wear-resistant member (29) is in friction contact with one side of the middle part of the first V-shaped elastic member (24), and a number of the convex covering parts (14) and the concave covering parts (15) are staggered. The second buffer assembly includes a plurality of first movable blocks (31) and a plurality of second movable blocks (34), wherein the plurality of first movable blocks (31) are distributed in a circumferential array on the outer side wall of the interior of the protective layer (11), and the plurality of second movable blocks (34) are distributed in a circumferential array on the inner side wall of the interior of the protective layer (11), and each of the first movable blocks (31) is provided with a second V-shaped groove (32) on one side facing the second movable block (34), and a V-shaped wear-resistant layer (33) is fixedly provided on the inner wall of the second V-shaped groove (32), and both sides of the second movable block (34) are inclined surface structures, and both sides of the second movable block (34) are in friction contact with the two side wall inclined surfaces of the V-shaped wear-resistant layer (33) respectively; Both sides of each first movable block (31) are inclined surface structures, and the inner side wall of the protective layer (11) is provided with a plurality of pairs of arc-shaped sliding grooves (38), each pair of the arc-shaped sliding grooves (38) is symmetrically distributed on both sides of the second movable block (34), and two sliders (37) are slidably provided in each pair of the arc-shaped sliding grooves (38), and a rotating plate (39) is rotatably provided on the inclined surface on the side where the two sliders (37) are close to each other; A plurality of first elastic protrusions (40) are provided at intervals on the side close to each other of each pair of rotating plates (39), and a plurality of second elastic protrusions (43) are provided at intervals on the inclined surfaces on both sides of each first movable block (31), and each pair of the first elastic protrusions (40) is in compression contact with each pair of the second elastic protrusions (43). A second V-shaped elastic member (35) is connected between each corresponding two sliders (37), and both ends of each second V-shaped elastic member (35) are respectively connected to the corresponding two sliders (37). One side of the middle of each second V-shaped elastic member (35) contacts the outer side wall inside the protective layer (11), and a second hollow elastic member (36) is connected between the other side of the middle of each second V-shaped elastic member (35) and the inner side wall inside the protective layer (11).

2. The mechanical damage resistant cable according to claim 1, characterized in that: The inclined upper end of each rotating plate (39) is rotatably connected to one side of the slider (37), and a third hollow elastic member (41) is connected between the inclined lower end of each rotating plate (39) and one side of the slider (37).

3. The mechanical damage resistant cable according to claim 2, characterized in that: The interior of each third hollow elastic member (41) and the interior of each second hollow elastic member (36) are communicated with each other and a telescopic connecting pipe (42) is provided.

4. The mechanical damage resistant cable according to claim 1, characterized in that: The interior of each pressure head (19) is wrapped with a steel strand (20), and each support bar (18) and the pressure head (19) are made of polyvinyl chloride material.

5. The mechanical damage resistant cable according to claim 1, characterized in that: The inner protective sleeve (13) is made of rubber material, and the buffer material (21) is made of polyethylene foam material.

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