Abrasion-resistant cable and cable protection assembly therefor

Abstract

The application relates to the cable technical field and discloses a wear-resistant cable and a cable protection assembly thereof, which comprises a wear-resistant cable and an arc-shaped plate. The wear-resistant cable comprises an outer sheath, a tensile reinforcing layer arranged on the inner side of the outer sheath, an inner sheath arranged on the inner side of the tensile reinforcing layer, and a wire core component arranged on the inner side of the inner sheath. A smooth section and a wear-resistant section are arranged on the outer surface of the outer sheath, the smooth section and the wear-resistant section are uniformly and spacedly distributed, ribs are arranged on the wear-resistant section, the ribs are arranged in multiple, the area between two adjacent ribs is a recessed area, and a heat dissipation groove is arranged in the recessed area. When the cable passes through a hole in a wall, the wear-resistant section concentrates mechanical wear, and surface loss is avoided. The ribs with the spiral structure generate a circumferential force when the cable passes through the hole in the wall, the cable is inhibited from being twisted, the ribs and the hole always keep continuous line contact, the contact stress is uniformly distributed, local crushing is avoided, a transition slope avoids stress mutation, the structural strength is improved, and the wear debris can be guided to slide to the recessed area.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, more particularly to a wear-resistant cable and a cable protection assembly thereof. BACKGROUND

[0002] A cable is a composite structure wire device for transmitting electric energy or signals, which is usually composed of a plurality of mutually insulated conductors (wires) combined together and wrapped with an outer layer of insulating protective material.

[0003] The inner wall of a wall hole is often rough and uneven, and the surface of a traditional smooth outer sheath of a cable will be subjected to severe friction with the rough hole wall when the cable passes through the wall hole, which will cause the outer sheath to be quickly worn out, thereby increasing the risk of exposure of the local insulation layer of the cable. In addition, when the cable passes through the opening of the wall hole, a bending stress concentration point will be formed at the sharp opening due to the gravity sagging of the cable, and the outer sheath will be repeatedly bent and worn out, which will cause cracking and further increase the risk of exposure of the insulation layer. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the present application provides a wear-resistant cable and a cable protection assembly thereof to solve the problems existing in the background art.

[0005] The present application provides the following technical solutions: a wear-resistant cable and a cable protection assembly thereof, comprising a wear-resistant cable and an arc-shaped plate.

[0006] The wear-resistant cable comprises an outer sheath, a tensile reinforcing layer arranged on the inner side of the outer sheath, an inner sheath arranged on the inner side of the tensile reinforcing layer, a wire core member arranged on the inner side of the inner sheath, a smooth section and a wear-resistant section arranged on the outer surface of the outer sheath, the smooth section and the wear-resistant section being uniformly and spacedly distributed, a plurality of ribs arranged on the wear-resistant section, a region between adjacent two ribs being a recessed region, and a heat dissipation groove being arranged in the recessed region.

[0007] The ribs are in a spiral structure and are arrayed in the circumferential direction of the cable, the cross-sectional profile of the ribs comprises an arc-shaped convex peak and a transition slope on both sides of the arc-shaped convex peak, and the transition slope is used for connecting the arc-shaped convex peak and the recessed region.

[0008] The ribs comprise a base layer, an abrasion layer arranged on the side of the base layer away from the center of the cable, the abrasion layer being directly contacted with the wall hole, and a tensile steel wire inserted in the base layer.

[0009] The spiral angle of the ribs is thirty degrees, the abrasion layer is made of a high polymer composite material containing ceramic micro-powder, and the base layer is made of a thermoplastic elastomer material.

[0010] The wire core member comprises a conductor, a conductor shielding layer arranged outside the conductor, an insulating shielding layer arranged outside the conductor shielding layer, and an insulating filler filled between the conductor shielding layer and the insulating shielding layer, and a silicon grease filled between the insulating shielding layer and the inner sheath.

[0011] The arc-shaped plate is provided with supporting frames, two supporting frames are symmetrically arranged, a lower roller is rotatably arranged between the two supporting frames, a guide rod is fixedly connected to the top of one of the supporting frames, a guide block is arranged on the surface of the guide rod, an upper roller is arranged on the top of the lower roller, the upper roller is rotatably connected with the guide block, and a compression spring is arranged on the surface of the guide rod.

[0012] The axis of the lower roller is arranged in parallel with the axis of the upper roller, and the axis of the lower roller and the axis of the upper roller are perpendicular to the axis of the cable in a state that the cable is straightly arranged in the hole of the wall.

[0013] The arc-shaped plate is provided with inner supporting members, two inner supporting members are symmetrically arranged, the inner supporting member comprises a bridge and a movable rod, the bridge is fixedly arranged on the arc-shaped plate, the movable rod penetrates through the bridge and the arc-shaped plate, and the movable rod is slidably connected with the bridge, one end of the movable rod is fixedly connected with a pressing block, and a positioning spring is arranged on the surface of the movable rod.

[0014] Preferably, the arc-shaped radius of the arc-shaped plate is consistent with the radius of the hole of the wall, the elastic force of the compression spring drives the upper roller to press the cable, and the elastic force does not affect the performance of the cable.

[0015] Preferably, the elastic force of the positioning spring drives the pressing block to tightly abut against the inner wall of the hole of the wall, and the contact surface of the pressing block and the hole of the wall is made of a material with high friction coefficient.

[0016] The cable is worn and torn when passing through the hole of the wall, the wear-resistant section concentrates the mechanical wear and tear, and the full surface is avoided from being worn and torn, the rib of the spiral structure generates a circumferential component force when the cable passes through the hole of the wall, the cable is prevented from being twisted, the rib and the hole always keep continuous line contact, the contact stress is uniformly distributed, and local crushing is avoided, the smooth section reduces the contact area with the hole of the wall, the friction heat accumulation is reduced, the heat dissipation groove arranged in the recessed area cooperates with the heat dissipation channel formed by the gaps between the ribs to further improve the heat dissipation effect of the cable, the transition slope avoids stress mutation, improves the structural strength, and can guide the wear debris to slide to the recessed area, and further reduces the wear risk, the rolling friction is generated between the wear layer and the hole of the wall, and the wear is reduced in cooperation with the spiral rib, the base layer can impact energy, and the rib root is prevented from being cracked, and the stress borne by the base layer can be transmitted to the tensile steel wire, so that the flexibility and elasticity are ensured, and the structural strength is ensured.

[0017] When the cable enters the hole from the hole of the wall, the cable is guided to the area between the upper roller and the lower roller, so that the cable is perfectly avoided from contacting the sharp edge of the hole, and the cable is directly introduced into the hole, which effectively reduces the abrasion of the outer sheath, prevents the unnecessary wear of the wear-resistant section of the outer sheath at the hole, keeps the wear-resistant section in good condition when entering the hole, and maximizes the wear-resistant effect of the wear-resistant section in the hole. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a whole matching diagram of the wear-resistant cable and the cable protection assembly.

[0020] Figure 2 It is a structural schematic diagram of the wear-resistant cable.

[0021] Figure 3 It is Figure 2 It is an enlarged view of structure A in the figure.

[0022] Figure 4 It is a sectional view of the wear-resistant cable.

[0023] Figure 5 It is a force analysis diagram of the rib of the wear-resistant cable under the torsional traction.

[0024] Figure 6 It is a structural schematic diagram of the cable protection assembly.

[0025] Figure 7 It is a structural schematic diagram of the inner support member of the cable protection assembly.

[0026] Figure 8 It is an installation diagram of the cable protection assembly when the wear-resistant cable is bent to enter the hole of the wall.

[0027] The attached figures are labeled as follows: 1. Outer sheath; 11. Smooth section; 12. Wear-resistant section; 12a. Recessed area; 121. Rib; 1211. Substrate layer; 1212. Wear layer; 1213. Tensile steel wire; 122. Heat dissipation groove; 2. Tensile reinforcement layer; 3. Inner sheath; 4. Core component; 41. Conductor; 42. Conductor shielding layer; 43. Insulating shielding layer; 44. Insulating filler; 5. Silicone grease; 6. Arc plate; 61. Support frame; 62. Guide rod; 63. Guide block; 64. Compression spring; 7. Lower roller; 8. Upper roller; 9. Internal support component; 91. Cable tray; 92. Movable rod; 93. Extrusion block; 94. Positioning spring. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Reference Figures 1 to 8 This embodiment provides an abrasion-resistant cable and its cable protection assembly, including an abrasion-resistant cable and an arc plate.

[0030] The wear-resistant cable includes an outer sheath 1, with a tensile reinforcing layer 2 on the inner side of the outer sheath 1. The tensile reinforcing layer 2 is made of steel strip, which has high strength and corrosion resistance and can effectively withstand mechanical stress. An inner sheath 3 is provided inside the tensile reinforcing layer 2, and a wire core component 4 is provided inside the inner sheath 3. The outer surface of the outer sheath 1 is provided with a smooth section 11 and a wear-resistant section 12, which are evenly spaced. Ribs 121 are provided on the wear-resistant section 12, and multiple ribs 121 are provided. The area between two adjacent ribs 121 is a recessed area 12a, and a heat dissipation groove 122 is provided in the recessed area 12a.

[0031] Specifically, the segmented design of the outer sheath 1 ensures wear resistance in critical areas while reducing the overall weight of the cable. When the cable passes through a hole in the wall, the wear-resistant section 12 concentrates the mechanical wear, avoiding full-surface loss. The smooth section 11 reduces the contact area with the hole in the wall, reducing the accumulation of frictional heat. In addition, since the ribs 121 of the wear-resistant section 12 bear the responsibility of direct frictional contact with the hole in the wall, the structural strength of part of the recessed area 12a can be sacrificed. A heat dissipation groove 122 is opened in the recessed area 12a to reduce the thickness and further improve the heat dissipation effect of the cable.

[0032] The rib 121 has a spiral structure, and multiple ribs 121 are arranged in an array around the circumference of the cable. The cross-sectional profile of the rib 121 includes an arc-shaped peak and transition slopes on both sides of the arc-shaped peak. The transition slopes are used to connect the arc-shaped peak and the recessed area 12a.

[0033] Specifically, the rib 121 is arranged at a helix angle of 30 degrees. When the rib 121 is subjected to a torsional traction force, the contact points of the helix structure of the rib 121 with the inner wall of the hole of the wall body are radially offset. At this time, the rib 121 is pushed against the inner wall of the hole, and the extrusion force of the inner wall of the hole on the rib 121 increases. According to the characteristic that the friction force is proportional to the pressure under the condition that the dynamic friction coefficient is constant, the circumferential component of the torsional traction force increases, which can effectively limit the torsion of the cable. The rib 121 always maintains continuous line contact, and the contact stress is uniformly distributed to avoid local crushing. The gap between the ribs 121 forms a heat dissipation channel, which improves the air flow rate and the heat dissipation efficiency. The transition slope avoids stress sudden change, reduces the risk of root crack, and improves the structural strength. In addition, the transition slope can guide the wear debris to slide to the recessed area 12a, further reducing the risk of wear.

[0034] The rib 121 includes a base layer 1211, and an abrasion layer 1212 is arranged on the side of the base layer 1211 away from the center of the cable. The abrasion layer 1212 directly contacts the hole of the wall body. A tensile steel wire 1213 is inserted into the base layer 1211.

[0035] Specifically, the abrasion layer 1212 is made of a high polymer composite material containing ceramic micro powder. The ceramic micro powder can greatly improve the wear resistance of the abrasion layer 1212 compared with pure polymer. The ceramic micro powder can produce rolling friction with the friction interface, and cooperates with the spiral rib 121 to reduce wear. The base layer 1211 is made of a thermoplastic elastomer material. The elastomer material can absorb impact energy and prevent the rib 121 from cracking at the root. In addition, by inserting the tensile steel wire 1213 into the base layer 1211, the stress on the base layer 1211 can be transmitted to the tensile steel wire 1213, which ensures flexibility and elasticity and improves structural strength.

[0036] The conductor 41 is provided with a conductor shielding layer 42 on the outside, the conductor shielding layer 42 is provided with an insulating shielding layer 43 on the outside, the conductor shielding layer 42 and the insulating shielding layer 43 are filled with an insulating filler 44, and the insulating shielding layer 43 and the inner sheath 3 are filled with silicone cream 5.

[0037] Specifically, the conductor shielding layer 42 is made of cross-linked semi-conductive EVA composite material, and the insulating shielding layer 43 is made of ternary ethylene-propylene rubber material. The cross-linked semi-conductive EVA composite material and the ternary ethylene-propylene rubber material can optimize the electric field distribution, prevent partial discharge, and have electromagnetic shielding and grounding protection functions. The insulating filler 44 is made of ceramicized silicone rubber material, which can isolate flame and oxygen, consume combustion energy through endothermic decomposition reaction, and maintain the integrity of insulation. The silicone cream 5 can play the role of insulation protection and sealing water blocking.

[0038] In summary, when the cable passes through the wall hole, the wear-resistant section 12 concentrates the mechanical wear load, avoiding full surface loss. The spiral structure of the rib 121 generates a circumferential force when the cable passes through the wall hole, which inhibits the cable from twisting. The rib 121 is in continuous line contact with the hole at all times, and the contact stress is uniformly distributed, avoiding local crushing. The smooth section 11 reduces the contact area with the wall hole, reducing the accumulation of friction heat. The heat dissipation grooves 122 in the recessed area 12a, in combination with the heat dissipation channels formed by the gaps between the ribs 121, further improve the heat dissipation effect of the cable. The transition slope avoids stress discontinuity and improves structural strength, and can also guide the abrasive debris to slide into the recessed area 12a, further reducing the risk of wear. The abrasive layer 1212 generates rolling friction with the wall hole, and in combination with the spiral rib 121, it cooperatively reduces wear. The base layer 1211 can impact energy and prevent cracking at the root of the rib 121. The stress on the base layer 1211 can be transmitted to the tensile steel wire 1213, ensuring flexibility and elasticity as well as structural strength.

[0039] The arc-shaped plate 6 is fixedly installed with receiving frames 61, the receiving frames 61 are symmetrically provided with two, the two receiving frames 61 are rotationally installed with lower roller wheels 7, one of the receiving frames 61 is fixedly connected with a guide rod 62, the guide rod 62 is sleeved with a guide block 63, the lower roller wheel 7 is provided with an upper roller wheel 8, the upper roller wheel 8 is rotationally connected with the guide block 63, the axis of the lower roller wheel 7 is parallel to the axis of the upper roller wheel 8, the guide rod 62 is sleeved with a compression spring 64, the arc-shaped plate 6 is provided with inner support members 9, the inner support members 9 are symmetrically provided with two, the inner support members 9 include bridge frames 91 and movable rods 92, the bridge frames 91 are fixedly installed on the arc-shaped plate 6, the movable rods 92 penetrate through the bridge frames 91 and the arc-shaped plate 6, and the movable rods 92 are slidingly connected with the bridge frames 91, one end of the movable rod 92 is fixedly connected with an extrusion block 93, the extrusion block 93 is made of a material with high friction coefficient, and the movable rod 92 is sleeved with a positioning spring 94.

[0040] Further, the arc radius of the arc-shaped plate 6 is consistent with the radius of the wall hole, the elastic force of the compression spring 64 drives the upper roller wheel 8 to press the cable tightly, and the elastic force does not affect the performance of the cable, the elastic force of the positioning spring 94 drives the extrusion block 93 to tightly adhere to the inner wall of the wall hole, and the contact surface of the extrusion block 93 and the wall hole is made of a material with high friction coefficient, the material with high friction coefficient is selected from natural rubber, the natural rubber anti-skid pad has soft texture and good elasticity, good acid and alkali resistance and wear resistance, and can meet the anti-skid requirement.

[0041] In use, the staff member places the arc-shaped plate 6 into the hole of the wall hole, the elastic force of the positioning spring 94 drives the extrusion block 93 to tightly fit with the inner wall of the wall hole, strong friction force is generated, thereby fixing the position of the arc-shaped plate 6, the staff member passes the cable through the area between the lower roller 7 and the upper roller 8, under the extrusion of the cable, the upper roller 8 and the guide block 63 move upward along the guide rod 62 as a whole, the compression spring 64 exerts downward on the upper roller 8, the cable is positioned in the area between the upper roller 8 and the lower roller 7, at this time, when the cable is sent into the wall hole, the upper roller 8 and the lower roller 7 rotate around their own axes, and the cable avoids contact with the edge of the hole.

[0042] In addition, when the cable is bent into the wall hole, the staff member can still accurately guide the cable by adjusting the overall position of the protection assembly in the wall hole, if multiple cables need to be sent into the wall hole, the lower roller 7 can be designed as a wide roller with a width greater than 50 mm, and the upper roller 8 corresponds to the expanded width to realize synchronous guidance of multiple cables.

[0043] In summary, when the cable enters the hole from the hole of the wall, by guiding the cable to the area between the upper roller 8 and the lower roller 7, the cable can perfectly avoid contact with the sharp edge of the hole, and the cable is directly introduced into the hole, effectively reducing the wear of the outer sheath 1, preventing the wear-resistant section 12 of the outer sheath 1 from being unnecessarily worn at the hole, keeping the wear-resistant section 12 in good condition when entering the hole, and maximizing the anti-wear effect of the wear-resistant section 12 in the hole.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A cable protection assembly of a wear-resistant cable, comprising a wear-resistant cable and an arc-shaped plate (6), characterized in that, the wear-resistant cable comprises an outer sheath (1), a tensile reinforcing layer (2) is arranged inside the outer sheath (1), an inner sheath (3) is arranged inside the tensile reinforcing layer (2), a core member (4) is arranged inside the inner sheath (3), a smooth section (11) and a wear-resistant section (12) are arranged on the outer surface of the outer sheath (1), the smooth section (11) and the wear-resistant section (12) are uniformly and spacedly distributed, the wear-resistant section (12) is provided with ribs (121), a plurality of ribs (121) are arranged, the area between two adjacent ribs (121) is a recessed area (12a), and a heat dissipation groove (122) is arranged in the recessed area (12a); the rib (121) has a spiral structure, a plurality of ribs (121) are arrayed in the circumferential direction of the cable, the cross-sectional profile of the rib (121) comprises an arc-shaped convex peak and a transition slope on both sides of the arc-shaped convex peak, and the transition slope is used for connecting the arc-shaped convex peak and the recessed area (12a); the rib (121) comprises a base layer (1211), a wear layer (1212) is arranged on the side of the base layer (1211) away from the center of the cable, the wear layer (1212) directly contacts the wall hole, and a tensile steel wire (1213) is inserted in the base layer (1211); the spiral angle of the rib (121) is thirty degrees, the wear layer (1212) is made of a high polymer composite material containing ceramic micro powder, and the base layer (1211) is made of a thermoplastic elastomer material; the core member (4) comprises a conductor (41), a conductor shielding layer (42) is arranged on the outer side of the conductor (41), an insulation shielding layer (43) is arranged on the outer side of the conductor shielding layer (42), an insulation filler (44) is filled between the conductor shielding layer (42) and the insulation shielding layer (43), and silicone cream (5) is filled between the insulation shielding layer (43) and the inner sheath (3); the arc-shaped plate (6) is fixedly provided with a receiving frame (61), two receiving frames (61) are symmetrically arranged, a lower roller (7) is rotatably arranged between the two receiving frames (61), one of the receiving frames (61) is fixedly connected with a guide rod (62), the guide rod (62) is sleeved with a guide block (63), the lower roller (7) is provided with an upper roller (8) on the top, the upper roller (8) is rotatably connected with the guide block (63), and the guide rod (62) is sleeved with a compression spring (64); the axis of the lower roller (7) is arranged in parallel with the axis of the upper roller (8), and the axes of the lower roller (7) and the upper roller (8) are perpendicular to the axis of the cable in the state that the cable is straightly inserted into the wall hole; the arc-shaped plate (6) is provided with an inner support member (9), the inner support member (9) comprises a bridge (91) and a movable rod (92), the bridge (91) is fixedly arranged on the arc-shaped plate (6), the movable rod (92) penetrates through the bridge (91) and the arc-shaped plate (6), and the movable rod (92) is slidably connected with the bridge (91), one end of the movable rod (92) is fixedly connected with a pressing block (93), and the movable rod (92) is sleeved with a positioning spring (94).

2. A cable protection assembly for a wear resistant cable according to claim 1, characterized in that The arc radius of the arc-shaped plate (6) is consistent with the radius of the hole of the wall, and the elastic force of the compression spring (64) drives the upper roller (8) to compress the cable, and the elastic force does not affect the performance of the cable.

3. A cable protection assembly for a wear resistant cable according to claim 2, characterised in that, The elastic force of the positioning spring (94) drives the extrusion block (93) to tightly fit the inner wall of the hole of the wall, and the contact surface of the extrusion block (93) and the hole of the wall is made of a material with high friction coefficient.

Images