Anti-torsion multi-core sheath cable

Abstract

The utility model discloses an anti-torsion multi-core sheath cable which comprises a spiral line core and a sheath, and an anti-torsion structure layer is arranged between the spiral line core and the sheath. The anti-torsion structure layer comprises a plurality of framework structures, each framework structure is provided with a fixing disc and a sleeving ring, and the fixing discs and the sleeving rings are connected through a plurality of reinforcing ribs; the plurality of skeleton structures are arranged along the axis direction of the spiral line core, the fixed disc is relatively connected with the spiral line core in a sleeving manner, the sleeving ring is relatively connected with the fixed disc of the adjacent skeleton structure in a sleeving manner, and the sleeving ring rotates relative to the outer circular surface of the fixed disc; a flexible filling layer is arranged in a gap of the skeleton structure and a gap of the spiral line core, and the sheath is connected with the outer circular surface of the flexible filling layer and the outer circular surface of the sleeving ring. According to the utility model, the interference of external torsion on the internal multi-core structure is relieved, and the torsion resistance of the multi-core sheath cable is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to multi -core sheath cable technology field especially a kind of anti-torsion multi -core sheath cable. BACKGROUND

[0002] Multi-core sheath cable refers to multi-core wire with sheath layer, generally for multiple copper core conductor winding, in addition to the insulation layer of conductor itself, outside still has a layer of protective layer, but the common multi-core sheath cable generally sheath layer is directly wrapped in the outside of multiple wire core, when cable is subjected to external torsion, it is easy to cause mutual friction between internal multiple wire core, and the insulation layer of each wire core is caused to a certain extent torsion and stretch, leading to internal structure is easily damaged, affect the service life of cable. SUMMARY

[0003] The utility model discloses a kind of anti-torsion multi -core sheath cable to overcome the deficiencies in the prior art, alleviate external torsion to the interference of internal multiple wire core structure, improve the torsion resistance of multi-core sheath cable.

[0004] Technical scheme: to achieve the above object, a kind of anti-torsion multi -core sheath cable of the utility model, including spiral wire core and sheath, the spiral wire core between the sheath is provided with anti-torsion structure layer;

[0005] The anti-torsion structure layer includes several framework structures, the framework structure is provided with fixed disc and sleeve joint ring, the fixed disc is connected with the sleeve joint ring through several reinforcing ribs;

[0006] Multiple framework structures are arranged along the axial direction of the spiral wire core, the fixed disc is relatively sleeved with the spiral wire core, the sleeve joint ring is relatively sleeved with the fixed disc of adjacent framework structure, the sleeve joint ring rotates relative to the outer circular surface of the fixed disc;

[0007] The gap of the framework structure and the gap of the spiral wire core are provided with flexible filling layer, and the outer circular surface of the flexible filling layer and the outer circular surface of the sleeve joint ring are connected with the sheath.

[0008] Further, the spiral wire core is composed of several conductors spirally wound, the central region of the fixed disc is uniformly distributed and provided with several threading holes, and each threading hole is provided for a single conductor.

[0009] Further, the center of multiple fixed discs is connected by a plurality of prisms.

[0010] Further, the outer annular region of multiple fixed discs is connected by a plurality of flexible metal wires, and the flexible metal wires are uniformly arranged around the outside of the spiral wire core, and the flexible metal wires are arranged in parallel with the central axis of the spiral wire core.

[0011] Further, the fixing disc and the mating surface of the sleeve ring are clamped and matched through the clamping ring and the ring groove structure, and the clamping ring is rotationally arranged in the ring groove.

[0012] Further, the outer circular surface of the sleeve ring is provided with a plurality of clamping grooves, and the protrusions on the inner wall surface of the sheath are clamped into the clamping grooves.

[0013] Beneficial effects: the anti-torsion multi-core sheath cable of the utility model, when the cable is subjected to external force torsion, the torsional stress is mainly concentrated at each sleeve ring, and the torsional stress cannot be directly transmitted to the fixed disc matched with the sleeve ring in the radial direction, but is transmitted to the two side flexible filling layers, the reinforcing ribs are obliquely inserted into the flexible filling layers, the torsional strength of the flexible filling layers is enhanced, a part of the torsional stress is resisted, the torsional stress transmitted to the spiral wire core is small, the internal wire core structure is almost not affected, invisible internal damage is avoided, the use safety and service life of the cable are improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an axial half-section local structure schematic view of the anti-torsion multi-core sheath cable.

[0015] Figure 2 It is an axial half-section local structure schematic view of the anti-torsion multi-core sheath cable. Figure 1 It is a radial section structure schematic view of A-A. Specific embodiments

[0016] The utility model will be further described below in combination with the drawings.

[0017] As shown in the accompanying drawings Figures 1-2 The anti-torsion multi-core sheath cable comprises a spiral wire core 1 and a sheath 2, and an anti-torsion structure layer is arranged between the spiral wire core 1 and the sheath 2.

[0018] The anti-torsion structure layer comprises a plurality of framework structures, the framework structure is provided with a fixed disc 3 and a sleeve ring 4, and the fixed disc 3 and the sleeve ring 4 are connected through a plurality of reinforcing ribs 5; the reinforcing rib can play the role of connection and support, maintains the relative position relationship of the fixed disc and the sleeve ring on the same framework structure, including the axial spacing and the angle of relative rotation around the shaft.

[0019] A plurality of said skeleton structures are arranged along the axial direction of said spiral core 1, said fixed disc 3 is connected to said spiral core 1, said sleeve ring 4 is connected to said fixed disc 3 of adjacent skeleton structure, and said sleeve ring 4 rotates relative to the outer surface of said fixed disc 3; that is, a plurality of skeleton structures are connected end to end to form a continuous long skeleton structure, which is sleeved between the spiral core 1 and the sheath 2, and plays the roles of supporting the internal space structure, fixing the shape of the core, and resisting the torsion of the core. The plurality of bone joints can relatively rotate.

[0020] The gap of said skeleton structure and the gap of said spiral core 1 are provided with a flexible filling layer 6, and the outer surface of said flexible filling layer 6 and the outer surface of said sleeve ring 4 are connected to said sheath 2. The flexible filling layer is filled with elastic medium, such as resin material, so that the torsional stress formed on the surface of the sheath under the action of external force is transmitted inward through the flexible filling layer and the sleeve ring. The sleeve ring can divide the cable under the action of torsional stress into a plurality of small segments, thereby shortening the length of continuous torsion in the axial direction. Due to the relative rotation between the sleeve ring and the fixed disc, when external force acts on the sheath, the torsion of the sheath will drive the rotation of the sleeve ring. The sleeve ring needs to be transmitted to the fixed disc connected thereto through the reinforcing rib and the flexible filling layer, rather than being directly transmitted to the inner layer in the radial direction, thereby prolonging the transmission path, weakening the torsional stress acting on the fixed ring, and relatively stabilizing the fixed ring due to the constraint of the spiral structure of the core. Therefore, the sleeve ring is basically not subjected to the torsion of external force, and the influence of the torsion on the structure of the core is also greatly weakened, thereby avoiding the mutual friction between the multiple cores and weakening the stretching and torsion of the core itself, and greatly prolonging the service life of the multi-core sheath cable.

[0021] Said spiral core 1 is composed of a plurality of wires 11 spirally wound, and a plurality of wire holes 31 are uniformly distributed in the central region of said fixed disc 3, each of said wire holes 31 being provided for a single said wire 11 to pass through. The wire holes play the roles of guiding the wire path and fixing the structure of the spiral core 1. On this basis, the flexible filling layer is further filled in the gap between the wires, further fixing the relative relationship between the wires, and avoiding friction and structural changes.

[0022] The centers of a plurality of said fixed discs 3 are connected by a plurality of prisms 7. The outer annular region of a plurality of said fixed discs 3 is connected by a plurality of flexible metal wires 8, and the plurality of said flexible metal wires 8 are uniformly arranged around the outer side of said spiral core 1, and said flexible metal wires 8 are arranged in parallel with the central axis of said spiral core 1. The flexible metal wires can be selected from high-strength steel wires, and the prisms and steel wires are beneficial to weakening the relative rotation tendency of each fixed disc. The torsion constraint structure is constructed by the prisms and steel wires, and the mutual restriction among the torsion constraint structure, the fixed disc and the spiral core is achieved to reach a stable internal balance.

[0023] The fixing disc 3 and the mating surface of the sleeve ring 4 are connected by a snap ring and a ring groove structure, and the snap ring is rotatably arranged in the ring groove. It is ensured that only relative rotation occurs between the two, and no axial relative movement occurs.

[0024] The outer circular surface of the sleeve ring 4 is provided with a plurality of clamping grooves, and the protrusion 21 on the inner wall surface of the sheath 2 is clamped into the clamping grooves. The effect of torsional stress on the sleeve ring is strengthened, thereby weakening the direct transmission of stress between the sheath and the flexible filling layer.

[0025] Based on the above structure, when the cable is subjected to external torsion, the torsional stress is mainly concentrated at each sleeve ring, so that each sleeve ring has a relative torsional movement trend. At the same time, through the reinforcing effect of the internal multi-prism and the flexible metal wire, the torsional trend of each fixing disc is weakened, so that the relative rotation trend between the cooperated fixing disc and the sleeve ring is increased. However, there is no direct connection between the two, only relative rotation, so that the stress radial transmission path is blocked. At the same time, since the elastic filling layer is in contact with the side end surface of the fixing disc and the sleeve ring at the same time, the relative movement between the two causes the torsional stress between the elastic filling layers in contact with the two, that is, the external torsional stress cannot be directly transmitted to the fixing disc cooperated with the sleeve ring in the radial direction, but is transmitted to the flexible filling layers on both sides. The reinforcing ribs are obliquely inserted into the flexible filling layer, which enhances the torsional strength of the flexible filling layer, thereby resisting a part of the torsional stress, and finally the torsional stress transmitted to the spiral wire core is small, which almost does not affect the internal wire core structure, avoids the occurrence of invisible internal damage, and improves the use safety and service life of the cable.

[0026] The above is only a preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A torsion-resistant multi-core sheathed cable, characterized by: It comprises a spiral core (1) and a sheath (2), wherein an anti-torsion structural layer is provided between the spiral core (1) and the sheath (2); The torsion-resistant structural layer comprises a plurality of skeleton structures, wherein the skeleton structures are provided with a fixed disk (3) and a sleeve ring (4), and the fixed disk (3) and the sleeve ring (4) are connected via a plurality of reinforcing ribs (5); A plurality of the skeleton structures are arranged along the axis direction of the spiral core (1); the fixed disk (3) is relatively sleeved with the spiral core (1); the sleeve ring (4) is relatively sleeved with the fixed disk (3) of the adjacent skeleton structure; and the sleeve ring (4) rotates relative to the outer circumference of the fixed disk (3); A flexible filling layer (6) is provided in the gap of the skeleton structure and the gap of the spiral core (1), and the sheath (2) is connected to the outer circumferential surface of the flexible filling layer (6) and the outer circumferential surface of the sleeve ring (4).

2. The torsion-resistant multi-core sheathed cable according to claim 1, characterized in that: The spiral core (1) is formed by spirally winding a plurality of conductors (11); a plurality of threading holes (31) are evenly distributed in the central area of ​​the fixed disk (3); each threading hole (31) is for a single conductor (11) to pass through.

3. The torsion-resistant multi-core sheathed cable according to claim 2, characterized in that: The centers of the plurality of fixed disks (3) are connected in series via a polygonal body (7).

4. The torsion-resistant multi-core sheathed cable according to claim 3, characterized in that: The outer annular areas of the plurality of fixed disks (3) are connected in series by a plurality of flexible metal wires (8), and the plurality of flexible metal wires (8) are evenly arranged around the outside of the spiral core (1), and the flexible metal wires (8) are arranged parallel to the central axis of the spiral core (1).

5. The torsion-resistant multi-core sheathed cable according to claim 4, characterized in that: The matching surfaces of the fixed disk (3) and the sleeve ring (4) are engaged with each other through a snap ring and an annular groove structure, and the snap ring is rotatably arranged in the annular groove.

6. The torsion-resistant multi-core sheathed cable according to claim 5, characterized in that: The outer circumferential surface of the sleeve ring (4) is provided with a plurality of slots, and the protrusions (21) on the inner wall surface of the sleeve (2) are correspondingly engaged with the slots.

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