High-flexibility torsion-resistant drag chain cable

Abstract

The invention discloses a high-flexibility torsion-resistant drag chain cable, which comprises a flexible inner sheath and a flexible outer sheath, and is characterized in that a central fiber bundle is arranged at the center of the flexible inner sheath and is arranged along the axis of the flexible inner sheath; a plurality of cable cores located in the flexible inner sheath are evenly distributed around the center fiber bundle in the circumferential direction, and the area between the cable cores and the flexible inner sheath is filled with flexible anti-torsion foaming filler. The exterior of the flexible inner sheath is sleeved with an insulation shielding layer, the exterior of the insulation shielding layer is sleeved with an anti-torsion middleware, and the exterior of the anti-torsion middleware is sleeved with a flexible outer sheath. A plurality of flexible spiral anti-torsion strips are arranged between the inner side of the anti-torsion middleware and the outer side of the insulation shielding layer and between the outer side of the anti-torsion middleware and the inner side of the flexible outer sheath in a staggered mode in the circumferential direction. The torsion resistance of the cable is effectively improved, and the situation that the cable deforms, cracks and breaks the core in the long-time frequent moving, bending and torsion process is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of drag chain cables, and particularly relates to a highly flexible and torsion-resistant drag chain cable. Background Art

[0002] Drag chain cables, also known as mobile cables, generally have a structure where the cable is placed in a drag chain and moves along with the drag chain in a working environment. Since the drag chain moves frequently and drives the cable to move, bend, and twist, in order to ensure the normal operation of the cable, the cable inside the drag chain needs to have flexibility for movement. However, the movement of the drag chain causes the cable inside the drag chain to be subjected to frequent bending and torsional forces, and the relatively soft cable has relatively weak torsional resistance. During the process of the cable moving, bending, and twisting frequently with the drag chain for a long time, it is easy for the cable inside the drag chain to deform, crack, and the cable core to break, thereby affecting the normal operation of electrical equipment.

[0003] Therefore, in order to solve the problems of insufficient torsional resistance, easy deformation, cracking, and core breakage of existing flexible drag chain cables during long-term use, the present invention discloses a highly flexible and torsion-resistant drag chain cable. Summary of the Invention

[0004] The present invention discloses a highly flexible and torsion-resistant drag chain cable, which effectively improves the torsional resistance of the cable on the premise of ensuring a certain flexibility of the cable, and avoids the occurrence of deformation, cracking, core breakage, etc. during the process of the cable moving, bending, and twisting frequently for a long time.

[0005] The present invention is achieved by the following technical solutions: A highly flexible and torsion-resistant drag chain cable includes a flexible inner sheath and a flexible outer sheath. A central fiber bundle is arranged at the center of the flexible inner sheath, and the central fiber bundle is arranged along the axis of the flexible inner sheath; a plurality of cable cores located inside the flexible inner sheath are evenly arranged circumferentially around the central fiber bundle; a flexible torsion-resistant foamed filler is filled in the area between the cable cores and the flexible inner sheath; an insulating shielding layer is sleeved outside the flexible inner sheath, a torsion-resistant intermediate member is sleeved outside the insulating shielding layer, a flexible outer sheath is sleeved outside the torsion-resistant intermediate member, and a plurality of flexible spiral torsion-resistant strips are arranged circumferentially between the inner side of the torsion-resistant intermediate member and the outer side of the insulating shielding layer, and between the outer side of the torsion-resistant intermediate member and the inner side of the flexible outer sheath.

[0006] The central fiber bundle is used to cooperate with the flexible inner sheath to position and fix the cable core. At the same time, the central fiber bundle itself has a certain anti-torsion and anti-tensile ability. When the drag chain cable twists, the central fiber bundle, the flexible anti-torsion foamed filler, and the flexible spiral anti-torsion strip will all be torsionally deformed. Through the deformation of the central fiber bundle, the flexible anti-torsion foamed filler, and the flexible spiral anti-torsion strip, the torsional force of the drag chain cable can be effectively reduced. Furthermore, the drag chain cable has excellent anti-torsion ability during the processes of movement, bending, and torsion, effectively extending the service life of the drag chain cable and avoiding problems such as deformation and fracture of the drag chain cable.

[0007] First, the cable core is arranged circumferentially around the central fiber bundle, and the cable core is wound and fixed by a flexible tape to prevent the cable core from falling off and becoming loose. Then, a flexible inner sheath is sleeved outside the cable core, and a foaming material is filled in the gap between the flexible inner sheath and the cable core to form a flexible anti-torsion foamed filler between the flexible inner sheath and the cable core. Then, an insulating shielding layer is sleeved outside the flexible inner sheath to provide insulation protection and electromagnetic shielding for the drag chain cable. The flexible spiral anti-torsion strip is pre-laid at the positioning places on the inner side and the outer side of the anti-torsion intermediate member, and then the anti-torsion intermediate member is sleeved outside the insulating shielding layer. Finally, a flexible outer sheath is sleeved outside the anti-torsion intermediate member.

[0008] To better implement the present invention, further, a plurality of inner grooves are evenly arranged circumferentially between the inner side of the anti-torsion intermediate member and the outer side of the insulating shielding layer, and a plurality of outer grooves are evenly arranged circumferentially between the outer side of the anti-torsion intermediate member and the inner side of the flexible outer sheath. Flexible spiral anti-torsion strips are arranged inside the inner grooves and the outer grooves.

[0009] When the drag chain cable twists and bends, the flexible spiral anti-torsion strips at the inner grooves and the outer grooves will twist and bend accordingly. The flexible spiral structure of the flexible spiral anti-torsion strip can effectively reduce the torsional force and deform along the bending direction of the drag chain cable, thereby slowing down the overall torsional and bending degree of the drag chain cable and improving the anti-torsion performance of the drag chain cable.

[0010] To better implement the present invention, further, the inner grooves and the outer grooves are spirally arranged along the axis of the flexible inner sheath, and the inner grooves and the outer grooves are staggered circumferentially along the flexible inner sheath.

[0011] To better implement the present invention, further, a gap is provided between the flexible spiral anti-torsion strip and the inner groove or the outer groove, and flexible hollow plastic pipes are densely arranged in the gap.

[0012] To better implement the present invention, further, the flexible spiral anti-torsion strip includes an anti-torsion fiber bundle and a spiral rubber strip. The anti-torsion fiber bundle passes through the inside of the inner groove and the outer groove, and a spiral rubber strip is sleeved outside the anti-torsion fiber bundle.

[0013] To better implement the present invention, further, the torsion-resistant fiber bundle includes a plurality of torsion-resistant fiber sub-bundles, and the plurality of torsion-resistant fiber sub-bundles are helically twisted to form the torsion-resistant fiber bundle.

[0014] To better implement the present invention, further, a rubber positioning sleeve is provided outside the central fiber bundle, a plurality of helical positioning grooves are circumferentially provided on the outer side surface of the rubber positioning sleeve, and the cable core is arranged along the helical positioning grooves.

[0015] To better implement the present invention, further, the central fiber bundle includes a plurality of central fiber sub-bundles, and the plurality of central fiber sub-bundles are helically twisted to form the central fiber bundle.

[0016] To better implement the present invention, further, a flexible tape is sleeved outside the cable core.

[0017] To better implement the present invention, further, a flexible metal wear-resistant net is sleeved outside the flexible outer sheath.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) By arranging the central fiber bundle and cooperating with the flexible inner sheath to fix the cable core, and at the same time filling a flexible torsion-resistant foamed filler between the flexible inner sheath and the cable core, the cable core is protected by the flexible torsion-resistant foamed filler. At the same time, when the cable is bent and twisted, the torsional force directly received by the cable core is reduced through the deformation of the central fiber bundle and the flexible torsion-resistant foamed filler, thereby improving the torsion resistance of the cable core. (2) By providing an insulating protective layer outside the cable core to meet the insulation and electromagnetic shielding requirements of the cable, and at the same time arranging a torsion-resistant intermediate member between the outside of the insulation shielding layer and the flexible outer sheath, and circumferentially arranging a plurality of flexible spiral torsion-resistant strips on the inner and outer sides of the torsion-resistant intermediate member. When the cable is subjected to a torsional force, the torsional force directly received by the cable core can be effectively reduced through the follow-up deformation of the torsion-resistant intermediate member and the flexible spiral torsion-resistant strips. On the basis of ensuring a certain flexibility of the entire cable, the torsion resistance of the cable is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the internal structure of a highly flexible torsion-resistant drag chain cable; Figure 2 Schematic diagram of the installation of a highly flexible torsion-resistant drag chain cable; Figure 3 Schematic diagram of the structure of the flexible spiral torsion-resistant strip.

[0020] Wherein: 1 - flexible inner sheath; 2 - flexible outer sheath; 3 - central fiber bundle; 4 - cable core; 5 - flexible torsion-resistant foamed filler; 6 - insulating shielding layer; 7 - torsion-resistant intermediate member; 8 - flexible spiral torsion-resistant strip; 9 - hollow plastic tube; 10 - rubber positioning sleeve; 11 - flexible metal wear-resistant mesh; 81 - torsion-resistant fiber bundle; 82 - spiral rubber strip; 100 - inner groove; 200 - outer groove; 300 - spiral positioning groove. Detailed implementation mode

[0021] Example 1: A highly flexible and torsion-resistant drag chain cable in this embodiment, as Figure 1 and Figure 2 shown, includes a flexible inner sheath 1 and a flexible outer sheath 2. A central fiber bundle 3 is arranged at the center of the flexible inner sheath 1, and the central fiber bundle 3 is arranged along the axis of the flexible inner sheath 1; a plurality of cable cores 4 located inside the flexible inner sheath 1 are evenly arranged circumferentially around the central fiber bundle 3, and a flexible torsion-resistant foamed filler 5 is filled in the area between the cable core 4 and the flexible inner sheath 1; an insulating shielding layer 6 is sleeved outside the flexible inner sheath 1, a torsion-resistant intermediate member 7 is sleeved outside the insulating shielding layer 6, and a flexible outer sheath 2 is sleeved outside the torsion-resistant intermediate member 7. A plurality of flexible spiral torsion-resistant strips 8 are arranged circumferentially and alternately between the inner side of the torsion-resistant intermediate member 7 and the outer side of the insulating shielding layer 6, and between the outer side of the torsion-resistant intermediate member 7 and the inner side of the flexible outer sheath 2.

[0022] The flexible inner sheath 1 and the flexible outer sheath 2 are prepared from a halogen-free flame-retardant soft PUR material, so that the flexible inner sheath 1 and the flexible outer sheath 2 have certain flexibility and flame-retardant properties. At the same time, in order to avoid the wear of the flexible outer sheath 2 during the long-term movement of the drag chain, a flexible metal wear-resistant mesh 11 is sleeved outside the flexible outer sheath 2. The flexible metal wear-resistant mesh 11 is woven from copper wires with a diameter of 0.3 - 0.4 mm, and the weaving density is greater than or equal to 85%.

[0023] A central fiber bundle 3 is arranged at the center of the flexible inner sheath 1. The central fiber bundle 3 is prepared from polyester fiber or aramid fiber, which improves the torsion resistance and certain tensile properties of the drag chain cable. In order to fix the cable core 4 and prevent the cable core 4 from moving, a flexible torsion-resistant foamed filler 5 is filled in the area between the cable core 4 and the flexible inner sheath 1. The flexible torsion-resistant foamed filler 5 is a polyvinyl chloride foamed material, and the foaming degree of the polyvinyl chloride foamed material is between 70% - 80%. When the drag chain cable is twisted, the flexible torsion-resistant foamed filler 5 undergoes elastic deformation, thereby buffering the torsional force directly received by the cable core 4, and then improving the torsion resistance of the drag chain cable.

[0024] The insulating shielding layer 6 includes a flexible insulating layer and a shielding metal mesh sleeved outside the flexible insulating layer. The flexible insulating layer is prepared from a nitrile rubber elastic composite, and the shielding metal mesh is woven from copper wires. An anti-torsion intermediate member 7 is sleeved outside the insulating shielding layer 6. The anti-torsion intermediate member 7 is prepared from rubber or PVC material, so that the anti-torsion intermediate member 7 itself has the ability of anti-torsion deformation. When the drag chain cable twists, the anti-torsion intermediate member 7 deforms, and the torsional force received by the cable core 4 is reduced through the deformation of the anti-torsion intermediate member 7. At the same time, a plurality of flexible spiral anti-torsion strips 8 are arranged circumferentially and alternately between the inner side of the anti-torsion intermediate member 7 and the outer side of the insulating shielding layer 6, and between the outer side of the anti-torsion intermediate member 7 and the inner side of the flexible outer sheath 2. Whether the drag chain cable twists or bends, the flexible spiral anti-torsion strips 8 will deform, and the torsional force received by the cable core 4 is further reduced through the deformation of the flexible spiral anti-torsion strips 8, ensuring that the drag chain cable has excellent anti-torsion performance.

[0025] Embodiment 2: On the basis of the above Embodiment 1, this embodiment is further optimized. As Figure 2 shown, a plurality of inner grooves 100 are evenly arranged circumferentially between the inner side of the anti-torsion intermediate member 7 and the outer side of the insulating shielding layer 6, and a plurality of outer grooves 200 are evenly arranged circumferentially between the outer side of the anti-torsion intermediate member 7 and the inner side of the flexible outer sheath 2. Flexible spiral anti-torsion strips 8 are arranged inside both the inner grooves 100 and the outer grooves 200. The inner grooves 100 and the outer grooves 200 are spirally arranged along the axis of the flexible inner sheath 1, and the inner grooves 100 and the outer grooves 200 are arranged circumferentially and alternately along the flexible inner sheath 1.

[0026] The inner grooves 100 and the outer grooves 200 are used to position and install the flexible spiral anti-torsion strips 8. At the same time, the inner grooves 100 and the outer grooves 200 will also twist along with the shape when the anti-torsion intermediate member 7 twists and deforms, improving the anti-torsion performance of the anti-torsion intermediate member 7. And the inner grooves 100 and the outer grooves 200 are arranged alternately, that is, in the cross-section of the drag chain cable, the inner grooves 100 and the outer grooves 200 will not be located on the same diameter passing through the center of the cable, ensuring that the flexible spiral anti-torsion strips 8 can evenly disperse the torsional force.

[0027] Furthermore, a gap is provided between the flexible spiral anti-torsion strip 8 and the inner groove 100 or the outer groove 200, and flexible hollow plastic tubes 9 are densely arranged in the gap. When the flexible spiral anti-torsion strip 8 twists and deforms inside the inner groove 100 or the outer groove 200, the flexible hollow plastic tubes 9 will be synchronously extruded, and then the flexible hollow plastic tubes 9 will deform, and the over-twisting of the flexible spiral anti-torsion strip 8 is avoided through the deformation of the flexible hollow plastic tubes 9.

[0028] Other parts of this embodiment are the same as those of the above Embodiment 1, so they will not be described in detail.

[0029] Embodiment 3: This embodiment is further optimized on the basis of the above-mentioned Embodiment 1 or 2. For example, Figure 3 As shown, the flexible spiral torsion-resistant strip 8 includes a torsion-resistant fiber bundle 81 and a spiral rubber strip 82. The torsion-resistant fiber bundle 81 is disposed inside the inner groove 100 and the outer groove 200, and a spiral rubber strip 82 is sleeved outside the torsion-resistant fiber bundle 81. The torsion-resistant fiber bundle 81 is a polyester fiber bundle or an aramid fiber bundle. By providing the torsion-resistant fiber bundle 81, the flexible spiral torsion-resistant strip 8 can be ensured to have torsion-resistant and certain tensile properties, and the flexible spiral torsion-resistant strip 8 can be prevented from being directly damaged by torsion. At the same time, a spiral rubber strip 82 is sleeved outside the torsion-resistant fiber bundle 81. When the drag chain cable is twisted, the spiral rubber strip 82 twists to reduce the torsional force received by the cable core 4.

[0030] Furthermore, the torsion-resistant fiber bundle 81 includes a plurality of torsion-resistant fiber sub-bundles, and the plurality of torsion-resistant fiber sub-bundles are helically stranded to form the torsion-resistant fiber bundle 81. The diameter of the torsion-resistant fiber bundle 81 is less than or equal to 3 mm.

[0031] Other parts of this embodiment are the same as those of the above-mentioned Embodiment 1 or 2, so they will not be described in detail.

[0032] Embodiment 4: This embodiment is further optimized on the basis of any one of the above-mentioned Embodiments 1-3. For example, Figure 1 As shown, a rubber positioning sleeve 10 is disposed outside the central fiber bundle 3. A plurality of spiral positioning grooves 300 are circumferentially disposed on the outer side surface of the rubber positioning sleeve 10, and the cable core 4 is disposed along the spiral positioning grooves 300.

[0033] The cable core 4 is snap-fitted inside the spiral positioning grooves 300, and the cable core 4 is positioned and fixed by the spiral positioning grooves 300 to prevent the cable core 4 from circumferentially moving.

[0034] Furthermore, the central fiber bundle 3 includes a plurality of central fiber sub-bundles, and the plurality of central fiber sub-bundles are helically stranded to form the central fiber bundle 3. The diameter of the central fiber bundle 3 is less than or equal to 5 mm. By providing the central fiber bundle 3, the drag chain cable is ensured to have torsion-resistant and certain tensile properties.

[0035] Furthermore, a flexible tape is sleeved outside the cable core 4, and the thickness of the flexible tape is less than or equal to 1 mm. By providing the flexible tape, the cable core 4 can be prevented from being loose.

[0036] Furthermore, a flexible metal wear-resistant net 11 is sleeved outside the flexible outer sheath 2. By providing the flexible metal wear-resistant net 11, the flexible outer sheath 2 can be prevented from directly rubbing against the outside, thereby extending the service life of the flexible outer sheath 2.

[0037] Other parts of this embodiment are the same as any one of the above-mentioned Embodiments 1-3, so they will not be described in detail.

[0038] The above are the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A highly flexible torsion-resistant drag chain cable, comprising a flexible inner sheath (1) and a flexible outer sheath (2), characterized in that: A central fiber bundle (3) is arranged at the center of the flexible inner sheath (1), and the central fiber bundle (3) is arranged along the axis of the flexible inner sheath (1); a plurality of cable cores (4) located inside the flexible inner sheath (1) are evenly arranged around the central fiber bundle (3) in a circumferential direction, and a flexible anti-torsion foam filler (5) is filled in the area between the cable core (4) and the flexible inner sheath (1); an insulating shielding layer (6) is provided on the outside of the insulating shielding layer (6), an anti-torsion middle piece (7) is provided on the outside of the anti-torsion middle piece (7), and a flexible outer sheath (2) is provided on the outside of the anti-torsion middle piece (7); and a plurality of flexible spiral anti-torsion strips (8) are staggeredly arranged in a circumferential direction between the inner side of the anti-torsion middle piece (7) and the outer side of the insulating shielding layer (6), and between the outer side of the anti-torsion middle piece (7) and the inner side of the flexible outer sheath (2).

2. A highly flexible torsion-resistant drag chain cable according to claim 1, characterized in that: A plurality of inner grooves (100) are evenly arranged along the circumferential direction between the inner side of the anti-torsion middle piece (7) and the outer side of the insulating shielding layer (6), a plurality of outer grooves (200) are evenly arranged along the circumferential direction between the outer side of the anti-torsion middle piece (7) and the inner side of the flexible outer sheath (2), and flexible spiral anti-torsion strips (8) are arranged inside the inner grooves (100) and the outer grooves (200).

3. A highly flexible torsion-resistant drag chain cable according to claim 2, characterized in that: The inner groove (100) and the outer groove (200) are arranged in a spiral manner along the axis of the flexible inner sheath (1), and the inner groove (100) and the outer groove (200) are arranged in a staggered manner along the circumference of the flexible inner sheath (1).

4. A highly flexible torsion-resistant drag chain cable according to claim 3, characterized in that: A gap is provided between the flexible spiral anti-torsion strip (8) and the inner groove (100) or the outer groove (200), and flexible hollow plastic tubes (9) are densely arranged in the gap.

5. A highly flexible torsion-resistant drag chain cable according to claim 4, characterized in that: The flexible spiral anti-torsion strip (8) comprises an anti-torsion fiber bundle (81) and a spiral rubber strip (82); the anti-torsion fiber bundle (81) is inserted into the interior of the inner groove (100) and the outer groove (200); and the spiral rubber strip (82) is sleeved on the exterior of the anti-torsion fiber bundle (81).

6. A highly flexible torsion-resistant drag chain cable according to claim 5, characterized in that: The torsion-resistant fiber bundle (81) comprises a plurality of torsion-resistant fiber sub-bundles, and the plurality of torsion-resistant fiber sub-bundles are spirally twisted to form the torsion-resistant fiber bundle (81).

7. A highly flexible torsion-resistant drag chain cable according to any one of claims 1 to 6, characterized in that: A rubber positioning sleeve (10) is arranged outside the central fiber bundle (3), a plurality of spiral positioning grooves (300) are arranged on the outer surface of the rubber positioning sleeve (10) in a circumferential direction, and the cable core (4) is arranged along the spiral positioning grooves (300).

8. A highly flexible torsion-resistant drag chain cable according to claim 7, characterized in that: The central fiber bundle (3) comprises a plurality of central fiber sub-bundles, and the plurality of central fiber sub-bundles are spirally twisted to form the central fiber bundle (3).

9. A highly flexible torsion-resistant drag chain cable according to claim 8, characterized in that: The outer sheath of the cable core (4) is provided with a flexible wrapping tape.

10. A highly flexible torsion-resistant drag chain cable according to any one of claims 1 to 6, characterized in that: The outer cover of the flexible outer sheath (2) is provided with a flexible metal wear-resistant mesh (11).

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