Mechanical damage resistant cable

Abstract

The invention relates to the technical field of cables, and discloses a mechanical-damage-resistant cable which comprises an outer sheath pipe and a plurality of cable cores, the inner wall of the outer sheath pipe is provided with a protection layer, the inner wall of the protection layer is provided with a supporting layer, the inner wall of the supporting layer is provided with supporting strips, and one end of each supporting strip is provided with a pressing head. A flexible inner sheath tube is arranged between the plurality of pressure heads and the plurality of cable cores, and a first buffer assembly is arranged in the inner sheath tube; according to the invention, the basic rigidity of the cable can be maintained through the support strips, and the second buffer assembly in the protection layer, the buffer material in the inner sheath pipe and the first buffer assembly are matched, so that the cable has good flexibility when not extruded; when the cable is extruded by the outside, because the cable core and the pressure head are close to each other, the external force required for bending is increased, the rigidity of the cable under the external force is improved, the bendable radian of the cable at the hooping part is reduced, and the reduction of the mechanical property and the damage of each material layer caused by the large bending radian are avoided.

Description

Technical Field

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

[0002] Cables are usually rope-like cables made of several or several groups of wires twisted together. Each group of wires is insulated from each other and often twisted around a center, with a highly insulating covering on the entire outside. At present, the quality requirements of cables are constantly increasing, requiring cables to not only have excellent high temperature resistance and anti-break capabilities, but also have strong resistance to mechanical damage and other properties. Among them, resistance to mechanical damage refers to the ability of the cable to resist external mechanical actions without being damaged or with a small degree of damage. These mechanical external forces include tension, compression, bending, torsion, shearing and other forms. However, the cables in the prior art have the following defects: 1. In the prior art, 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 materials outside thereof are easily misaligned, and the tension is partially transferred to the cable core outside the steel strands, causing damage to the cable core; 2. In the prior art, when cables are laid in pipe corridors, underground pipe corridors, and buried underground, the cables 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 by clamps and other fastening parts. 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 susceptible to aging than other locations, which also aggravates the damage at these locations. Therefore, the existing cables will have greater damage at the bending locations during construction, causing the cables to fail to achieve the expected service life and performance. In addition, cables laid underground and in pipe corridors are relatively inconvenient in terms of inspection and maintenance, which has a negative impact on power supply and power supply safety. 3. In the prior art, the cable itself is a heat source, and its thermal performance is particularly important. Heat collection and high temperature will aggravate its aging and reduce its mechanical properties. The thermal expansion of the material will damage the outer coating of the material and cause the filling materials and the wiring harness to loosen. Therefore, the thermal performance of the cable also reflects the mechanical performance of the cable from the side.

[0003] Therefore, in view of this, the existing structure and defects are studied and improved to provide a mechanical damage resistant cable, in order to achieve a more practical and valuable purpose. Summary of the invention

[0004] The present invention provides a mechanical damage resistant cable, which is used to overcome the above-mentioned defects in the prior art.

[0005] The purpose and effect of the mechanical damage resistant cable of the present invention are achieved by the following specific technical means: A mechanical damage resistant cable comprises an outer sheath tube and a plurality of cable cores, wherein the inner wall of the outer sheath tube is provided with a protective layer, the protective layer is an airbag structure, and the interior of the protective layer is filled with CO 2 and N 2 A mixed gas, the inner wall of the protective layer is provided with a support layer, a plurality of support bars are fixedly provided in a circular array on the inner wall of the support layer, a pressure head is fixedly provided at one end of each of the support bars, a flexible inner sheath tube is provided between the plurality of pressure heads and the plurality of 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, a heat dissipation area surrounding the outer convex covering portion is provided between adjacent support bars, the outside of each of the cable cores is wrapped with a shielding layer, the inside of the inner sheath tube is filled with a 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, a first V-shaped groove is provided on each of the three surfaces of the reinforcing rib, a first V-shaped elastic member is connected between each two adjacent inner concave covering portions, and a spring is connected between the middle of each of the first V-shaped elastic members and the inside of the first V-shaped groove.

[0006] A further technical solution is that the two ends of each of the first V-shaped elastic parts 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 of the slide grooves, 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 connected to the inside of the slide groove and is mutually connected with a first hollow elastic part, and each of the first hollow elastic parts has a diamond structure, and a push rod is fixedly provided on the inclined surfaces on both sides of each of the first hollow elastic parts, and a wear-resistant part is fixedly provided at one end of each of the push rods, and one side of each of the wear-resistant parts is in friction contact with one side of the middle part of the first V-shaped elastic part, and a plurality of the convex covering parts are staggered with the concave covering parts.

[0007] 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, each of the first movable blocks is provided with a second V-shaped groove on one side facing the second movable block, 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 inclined structures, and both sides of the second movable block are in friction contact with the two side wall inclined surfaces of the V-shaped wear-resistant layer respectively.

[0008] According to a further technical solution, 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 sliding blocks are slidingly provided in each pair of the arc-shaped grooves, and a rotating plate is rotatably provided on the inclined surface on one side where the two sliding blocks are close to each other.

[0009] According to a further technical solution, a plurality of first elastic protrusions are provided at intervals on the side where each pair of rotating plates are close to each other, 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 the first elastic protrusions are respectively pressed and contacted with each pair of the second elastic protrusions.

[0010] A further technical solution is that a second V-shaped elastic member is connected between each corresponding two sliders, and both ends of each second V-shaped elastic member are respectively connected to the corresponding two sliders, one side of the middle part of each second V-shaped elastic member is in contact with the outer wall inside the protective layer, and a second hollow elastic member is connected between the other side of the middle part of each second V-shaped elastic member and the inner wall inside the protective layer.

[0011] According to a further technical solution, the inclined upper end of each rotating plate is rotatably connected to one side of the sliding block, and a third hollow elastic member is connected between the inclined lower end of each rotating plate and one side of the sliding block.

[0012] 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.

[0013] According to a further technical solution, 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.

[0014] 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.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a mechanical damage resistant cable. Through the arrangement of the first movable block, the second V-shaped groove, the V-shaped wear-resistant layer, the second movable block, and the protective layer, the outer sheath tube transmits the 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 close to the second movable block, so that one end of the second movable block enters the second V-shaped groove, and the two side inclined surfaces of the second movable block respectively contact the two side walls inside the V-shaped wear-resistant layer with friction, thereby performing a friction buffering action on the radial inner movement of the first movable block. Then, through the arrangement of the slider, the first elastic protrusion, and the second elastic protrusion, the radial inner movement of the first movable block drives the movement of several pairs of second elastic protrusions, and the several pairs of second elastic protrusions respectively contact the several pairs of first elastic protrusions on the two opposite sliders with compression, thereby performing a buffering action on the outside of the first movable block, which is beneficial for performing a double internal and external buffering action on the first movable block, and improving the resistance of the second buffer assembly to external mechanical forces.

[0016] The present invention provides a mechanical damage resistant cable. Through the arrangement of the second V-shaped elastic member, the first movable block moves radially inward to squeeze the middle of the second V-shaped elastic member, so that the second V-shaped elastic member is bent and deformed in the directions of both ends, and the distance between the two ends of the second V-shaped elastic member is expanded, so that the corresponding two sliders are moved away from each other, and thus the two relatively sliders are brought closer to each other. The relatively two sliders slide against each other in two symmetrical arc-shaped slide grooves, respectively, and the relatively two sliders are brought closer to each other, so that several pairs of first elastic protrusions are brought closer to each other, so that the distance between several pairs of first elastic protrusions and several pairs of second elastic protrusions is gradually reduced, so that the contact area between the first elastic protrusions and the second elastic protrusions is gradually increased, and the buffering effect between several pairs of first elastic protrusions and several pairs of second elastic protrusions is improved. 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 several pairs of first elastic protrusions to move, so as to further gradually reduce the distance between the several pairs of first elastic protrusions and the several pairs of second elastic protrusions, respectively, and further 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.

[0017] The present invention provides a mechanical damage resistant cable. Through the arrangement of the concave covering part, the reinforcing rib, the first V-shaped groove, the first V-shaped elastic part, and the spring, the three pressure heads move radially inward to squeeze the three concave covering parts respectively, so that both ends of the three first V-shaped elastic parts are squeezed, so that the middle part of the first V-shaped elastic part enters the first V-shaped groove. The middle part of the first V-shaped elastic part moves in the first V-shaped groove to compress the spring. The spring compression generates elastic force, and the elastic force generated by the spring acts on the middle part of the first V-shaped elastic part, so that the first buffer assembly has a buffering effect on the pressure head. Then, through the arrangement of the push plate, the first hollow elastic part, the push rod, and the wear-resistant part, the three concave covering parts are squeezed, so that the three push plates move radially inward. The radial inward movement of the three push plates squeezes and deforms the three first hollow elastic parts respectively. The deformation of the first hollow elastic part pushes the two push rods away from each other. The two push rods move away from each other and drive the corresponding two wear-resistant parts away from each other, so that the two relative wear-resistant parts located on both sides of the first V-shaped groove are close to each other. The two relatively wear-resistant parts are close to each other and frictionally 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 component on the pressure head.

[0018] The mechanical damage-resistant cable of the present invention maintains the basic rigidity of the cable through the support bar, cooperates with the second buffer component in the protective layer, the buffer material in the inner sheath tube, and the first buffer component, so that it has good flexibility when not squeezed; when it is squeezed externally, because the cable core and the pressure head are close to each other and gathered together, the external force required for bending is increased, which improves its rigidity when subjected to external force, reduces the curvature of the bendable part at the clamping part, and avoids the reduction of mechanical properties 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, which is convenient for heat dissipation and improves its bending and reset elasticity on the one hand, and can increase the spacing between adjacent cable cores on the other hand, and reduce mutual interference between cable cores. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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.

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is an isometric structural schematic diagram of the present invention; Figure 2It is an isometric structural schematic diagram of the inner sheath pipe in the present invention; Figure 3 It is a first cross-sectional structural schematic diagram of Embodiment 1 of the present invention; Figure 4 It is a second cross-sectional structural schematic diagram of the first embodiment of the present invention; Figure 5 for Figure 4 A schematic diagram of the local enlarged structure at point A in the middle; Figure 6 for Figure 4 A schematic diagram of the local enlarged structure at B in the middle; Figure 7 for Figure 6 A schematic diagram of the local enlarged structure at C in the middle; Figure 8 It is a schematic cross-sectional structural diagram of the second embodiment of the present invention.

[0022] Description of reference numerals: 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, supporting bar 18, pressing 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 pipe 42, second elastic protrusion 43, heat dissipation area 44, airbag 45. DETAILED DESCRIPTION

[0023] The following embodiments of the present invention are described in further detail in conjunction with 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.

[0024] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] As attached Figure 1 To Attachment Figure 7 As shown: The invention provides a mechanical damage resistant cable.

[0027] Embodiment 1 See attached Figure 1 To Attachment Figure 7 , including 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 CO 2 and N 2 A mixed gas, a supporting layer 12 is provided on the inner wall of the protective layer 11, a plurality of supporting bars 18 are fixedly provided in a circumferential array on the inner wall of the supporting layer 12, a pressure head 19 is fixedly provided at one end of each supporting bar 18, a flexible inner sheath tube 13 is provided between the pressure heads 19 and the cable cores 17, an outer convex covering portion 14 adapted to the cable core 17 is provided on the inner sheath tube 13, an inner concave covering portion 15 adapted to the pressure head 19 is provided on the inner sheath tube 13, a heat dissipation area 44 surrounding the outer convex covering portion 14 is provided between adjacent supporting bars 18, and a shielding layer 16 is wrapped around the outside of each cable core 17, The interior of the inner sheath tube 13 is filled with a buffer material 21, a first buffer component is provided inside the inner sheath tube 13, and a second buffer component is provided inside the protective layer 11; 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, a first V-shaped elastic member 24 is connected between each two adjacent concave covering portions 15, and a spring 30 is interconnected between the middle part of each first V-shaped elastic member 24 and the inside of the first V-shaped groove 23.

[0028] Preferably, see Attachment Figure 1 To Attachment Figure 5The 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. A push plate 25 is slidably provided inside each slide groove 26. 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 and is mutually connected with a first hollow elastic member 27. 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. 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. A plurality of convex covering parts 14 and concave covering parts 15 are staggered.

[0029] Preferably, see Attachment 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, and 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.

[0030] Preferably, see Attachment Figure 6 To Attachment 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 a plurality of 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, and 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 one side where the two sliders 37 are close to each other.

[0031] Preferably, see Attachment Figure 6 To Attachment 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, and each pair of first elastic protrusions 40 are respectively pressed and contacted with each pair of second elastic protrusions 43.

[0032] Preferably, see Attachment Figure 6 To Attachment Figure 7A second V-shaped elastic member 35 is connected between each corresponding pair of 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.

[0033] Preferably, see Attachment Figure 6 To Attachment 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 .

[0034] Preferably, see Attachment Figure 6 To Attachment 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.

[0035] Preferably, see Attachment Figure 1 To Attachment 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.

[0036] Preferably, see Attachment Figure 1 To Attachment Figure 7 The inner sheath tube 13 is made of rubber material, and the buffer material 21 is made of polyethylene foam material.

[0037] Embodiment 2 See attached Figure 8 In this embodiment, the second buffer assembly includes a plurality of airbags 45, the plurality of airbags 45 are located in the protective layer 11, and the interior of the airbags 45 is filled with CO 2 and N 2 It has significant advantages in improving the cable's resistance to mechanical damage, stability and reducing maintenance costs.

[0038] Specific use of the present invention: When the cable is subjected to external mechanical action, especially clamp-type encircling extrusion, 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, which can resist the external extrusion force and avoid damage to the cable core 17. The protective layer 11 is filled with CO 2 and N 2 Mixed gas has significant advantages in improving the cable's resistance to mechanical damage, stability and reducing maintenance costs. 2 and N 2The advantages of both can be combined by mixing them in a certain proportion and filling them into the protective layer 11. This mixed gas can not only maintain the hardness and compression resistance of the airbag, but also reduce the weight of the cable and improve the thermal stability and electrical insulation.

[0039] 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 component. 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 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 inner movement of the first movable block 31.

[0040] At the same time, the radial inner movement of the first movable block 31 drives the movement of several pairs of second elastic protrusions 43, and the several pairs of second elastic protrusions 43 are respectively pressed 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 buffering of the first movable block 31 inside and outside, and improving the resistance of the second buffer assembly to external mechanical forces. Among them, the two sliders 37 located on both sides of the second V-shaped elastic member 35 are called corresponding two sliders 37, and the side of the corresponding two sliders 37 close to each other is a plane, and the two ends of the second V-shaped elastic member 35 are respectively connected to the side of the corresponding two sliders 37 close to each other. The two sliders 37 located on both sides of the first movable block 31 are called relative two sliders 37, and the side of the relative two sliders 37 close to each other is an inclined surface.

[0041] Secondly, the first movable block 31 moves radially inward to squeeze the middle part of the second V-shaped elastic member 35, so that the second V-shaped elastic member 35 bends and deforms in the two ends, and the distance between the two ends of the second V-shaped elastic member 35 is expanded, so that the corresponding two sliders 37 are moved away from each other, and thus the two relative sliders 37 are brought closer to each other. The two relative sliders 37 slide against each other in the two symmetrical arc-shaped slide grooves 38, respectively, and the two relative sliders 37 are brought closer to each other, so that the several pairs of first elastic protrusions 40 are brought closer to each other, so that the distances between the several pairs of first elastic protrusions 40 and the several pairs of second elastic protrusions 43 are gradually reduced, so that the contact area between the first elastic protrusions 40 and the second elastic protrusions 43 is gradually increased, and the buffering effect between the several pairs of first elastic protrusions 40 and the several pairs of second elastic protrusions 43 is improved.

[0042] At the same time, the middle part of the second V-shaped elastic member 35 moves radially inward to squeeze the second hollow elastic member 36, so that the gas in the second hollow elastic member 36 enters the corresponding two third hollow elastic members 41 through the two telescopic connecting tubes 42, so as to expand the corresponding two third hollow elastic members 41. The 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, further increase the contact area between the first elastic protrusions 40 and the second elastic protrusions 43, further improve the buffering effect between the several pairs of first elastic protrusions 40 and the several pairs of second elastic protrusions 43, and further improve the resistance of the second buffer assembly to external mechanical forces.

[0043] Next, the external mechanical force exerted on the protection layer 11 and the second buffer component is transferred to the support layer 12 , and the support layer 12 transfers the mechanical force to the support bar 18 and the pressure head 19 , and the pressure head 19 presses the concave covering portion 15 and the first buffer component. When the pressure head 19 squeezes the first buffer component, the first buffer component has a certain compression space, so that the cable core 17 and the pressure head 19 are gathered toward the center of the cable. After the cable core 17 and the pressure head 19 are gathered 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, the pressure head 19 and the inner sheath tube 13 are all in a compressed state, which is equivalent to the increase of the connection strength of the cable core 17, the inner sheath tube 13, and the pressure head 19, the avoidance gap required for the 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 also in a compressed state, and the resistance to be overcome by bending the cable is also increased. Among them, the rigidity of the cable can be increased when it is subjected to external pressure. When the cable is bent, the components on both the inner and outer bending sides are compressed against each other, thereby improving the rigidity of this part.

[0044] At the same time, when the cable is squeezed from the outside, especially when it is squeezed by a clamp-type embracing type, the pressure heads 19 are gathered toward the center of the cable, and the three pressure heads 19 move radially inward to squeeze the three concave covering parts 15 respectively. The three concave covering parts 15 are squeezed, so that both ends of the three first V-shaped elastic members 24 are squeezed, so that the middle part of the first V-shaped elastic member 24 enters the first V-shaped groove 23. The middle part of the first V-shaped elastic member 24 moves in the first V-shaped groove 23 to compress the spring 30, and the spring 30 is compressed to generate elastic force, and the elastic force generated by the spring 30 acts on the middle part of the first V-shaped elastic member 24, so that the first buffer assembly has a buffering effect on the pressure head 19.

[0045] At the same time, the three concave covering parts 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 parts 27 respectively. The deformation of the first hollow elastic part 27 pushes the two push rods 28 away from each other. The two push rods 28 move away from each other and drive the corresponding two wear-resistant parts 29 away from each other, so that the two relative wear-resistant parts 29 located on both sides of the first V-shaped groove 23 are close to each other. The two relative wear-resistant parts 29 are close to each other and frictionally contact the middle two sides of the first V-shaped elastic part 24, so as to gradually increase the friction between the wear-resistant parts 29 and the first V-shaped elastic part 24, so as to improve the buffering effect of the first buffer assembly on the pressure head 19. Among them, the two wear-resistant parts 29 located on both sides of the first hollow elastic part 27 are called corresponding two wear-resistant parts 29, and the two wear-resistant parts 29 located on the two side walls of the first V-shaped groove 23 are called relative two wear-resistant parts 29.

[0046] Finally, when the cable is squeezed by external force, although the rigidity increases because the bending resistance increases due to the mutual squeezing of the cable components, the cable core 17 is still well protected under the squeezed state of each part, the heat dissipation area 44 still exists and is connected with the heat dissipation area 44 of the non-squeezed part, and the overall performance of the cable will not change significantly due to the 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 used to make it have good flexibility when it is not squeezed; when it is squeezed by the outside, because the cable core 17 and the pressure head 19 are close to each other, the external force required for bending increases, which improves its rigidity when subjected to external force, and reduces the curvature of the bendable curvature at the clamping part, avoiding the reduction of mechanical properties 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 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.

[0047] 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 component. The outer wall inside the protective layer 11 is acted upon by a 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. 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 inner movement of the first movable block 31. By setting 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, and 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 force.

[0048] The present invention provides a mechanical damage resistant cable. Through the arrangement of the second V-shaped elastic member 35, the first movable block 31 moves radially inward to squeeze the middle of the second V-shaped elastic member 35, so that the second V-shaped elastic member 35 is bent and deformed in the directions of both ends, and the distance between the two ends of the second V-shaped elastic member 35 is expanded, so that the corresponding two sliders 37 are moved away from each other, and thus the two relatively sliders 37 are brought closer to each other. The relatively two sliders 37 slide against each other in the two symmetrical arc-shaped slide grooves 38, respectively, and the relatively two sliders 37 are brought closer to each other, so that the several pairs of first elastic protrusions 40 are brought closer to each other, so that the distances between the several pairs of first elastic protrusions 40 and the several pairs of second elastic protrusions 43 are gradually reduced, so that the contact area between the first elastic protrusions 40 and the second elastic protrusions 43 is gradually increased, and the buffering effect between the several pairs of first elastic protrusions 40 and the several pairs of second elastic protrusions 43 is improved. By means of 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 plurality of pairs of first elastic protrusions 40 to move, so as to further gradually reduce the distance between the plurality of pairs of first elastic protrusions 40 and the plurality of pairs of second elastic protrusions 43, further gradually increase the contact area between the first elastic protrusions 40 and the second elastic protrusions 43, further improve the buffering effect between the plurality of pairs of first elastic protrusions 40 and the plurality of pairs of second elastic protrusions 43, and thus further improve the resistance of the second buffer assembly to external mechanical forces.

[0049] The present invention provides a mechanical damage resistant cable. Through the arrangement of the inner concave covering portion 15, the reinforcing rib 22, the first V-shaped groove 23, the first V-shaped elastic member 24, and the spring 30, the three pressing heads 19 move radially inward to squeeze the three inner concave covering portions 15 respectively, so that both ends of the three first V-shaped elastic members 24 are squeezed, so that the middle of the first V-shaped elastic member 24 enters the first V-shaped groove 23. The middle of the first V-shaped elastic member 24 moves in the first V-shaped groove 23 to compress the spring 30. The spring 30 is compressed to generate elastic force. The elastic force generated by the spring 30 acts on the middle of the first V-shaped elastic member 24, so that the first buffer assembly has a buffering effect on the pressing head 19. Then, 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, so that the three push plates 25 move radially inward. The three push plates 25 move radially inward to squeeze and deform 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 and drive the corresponding two wear-resistant members 29 away from each other, so that the two opposite wear-resistant members 29 located on both sides of the first V-shaped groove 23 approach each other. The two opposite wear-resistant members 29 approach each other and frictionally contact with both sides of the middle of the first V-shaped elastic member 24, so as to gradually increase the friction between the wear-resistant member 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.

[0050] The mechanical damage-resistant cable of the present invention 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 gathered, the external force required for bending is increased, and its rigidity when subjected to external force is improved, so that the curvature that can be bent in the clamping part is reduced, and the reduction of mechanical properties and damage to each material layer caused by a large bending curvature is avoided. Then, 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, which is convenient for heat dissipation and improves its bending and reset elasticity on the one hand, and can increase the spacing between adjacent cable cores 17 on the other hand, and reduce mutual interference between cable cores 17.

[0051] The embodiments of the present invention are given for the purpose 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 of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

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); a plurality of support bars (18) are fixedly arranged in a circumferential array on the inner wall of the support layer (12); a pressure head (19) is fixedly arranged at one end of each of the support bars (18); a flexible inner sheath tube (12) 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 of the cable cores (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 comprises a reinforcing rib (22), the reinforcing rib (22) being located in the middle of the inner protective sleeve (13), the cross section of the reinforcing rib (22) being a triangular structure, a first V-shaped groove (23) being provided on three surfaces of the reinforcing rib (22), a first V-shaped elastic member (24) being connected between each two adjacent inner concave covering portions (15), and a spring (30) being connected between the middle portion of each first V-shaped elastic member (24) and the inside of the first V-shaped groove (23).

2. A mechanical damage resistant cable according to claim 1, characterized in that: 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 slidably provided inside each of the slide grooves (26), and one end of each of the push plates (25) is connected to the inner wall of the concave covering part (15), and the other end of each of the push plates (25) is connected to the inside of the slide groove (26) and is mutually connected with a first hollow elastic member (27), and each of the first hollow elastic members (27) has a diamond structure, and a push rod (28) is fixedly provided on the inclined surfaces on both sides of each of the first hollow elastic members (27), and a wear-resistant member (29) is fixedly provided at one end of each of the push rods (28), and one side of each of the wear-resistant members (29) is in frictional contact with one side of the middle part of the first V-shaped elastic member (24), and a plurality of the convex covering parts (14) and the concave covering parts (15) are staggered.

3. The mechanical damage resistant cable according to claim 1, characterized in that: The second buffer assembly comprises 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 circumferential array on the outer side wall inside the protective layer (11); the plurality of second movable blocks (34) are distributed in a circumferential array on the inner side wall inside the protective layer (11); 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); 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; the two sides of the second movable block (34) are in frictional contact with two side wall inclined surfaces of the V-shaped wear-resistant layer (33) respectively.

4. A mechanical damage resistant cable according to claim 3, characterized in that: Both sides of each of the first movable blocks (31) are inclined structures, and the inner wall inside 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 sliding blocks (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 one side where the two sliding blocks (37) are close to each other.

5. A mechanical damage resistant cable according to claim 4, characterized in that: A plurality of first elastic protrusions (40) are arranged at intervals on the mutually adjacent sides of each pair of rotating plates (39); a plurality of second elastic protrusions (43) are arranged at intervals on the inclined surfaces on both sides of each first movable block (31); and each pair of the first elastic protrusions (40) are respectively in compression contact with each pair of the second elastic protrusions (43).

6. A mechanical damage resistant cable according to claim 5, characterized in that: A second V-shaped elastic member (35) is connected between each corresponding two sliders (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 of each second V-shaped elastic member (35) is in contact with 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).

7. A mechanical damage resistant cable according to claim 6, characterized in that: The inclined upper end of each rotating plate (39) is rotatably connected to one side of the sliding block (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 sliding block (37).

8. The mechanical damage resistant cable according to claim 7, characterized in that: The interior of each of the third hollow elastic members (41) and the interior of each of the second hollow elastic members (36) are communicated with each other and a telescopic connecting pipe (42) is provided.

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

10. 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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