Cable with long service life

Abstract

The utility model discloses a cable with long service life, which comprises a plurality of leads and an insulating layer, the leads are wrapped by the insulating layer, a protective layer is arranged outside the insulating layer, the protective layer comprises a tensile layer, a compressive layer and an anti-expansion layer, the anti-expansion layer is arranged at the outermost part, and the anti-expansion layer is tubular and made of elastic rubber materials; the compression-resistant layer is a spiral sleeve formed by winding a steel wire, and the cross section of the steel wire is rectangular or circular; the tensile layer is a plastic cylinder, a plurality of wire cores are uniformly arranged in the tensile layer along the axial direction, and the wire cores are plastic drawing wires; the tensile layer, the compression-resistant layer and the expansion-resistant layer are sequentially arranged from inside to outside, the inner wall of the tensile layer is attached to the outer wall of the insulating layer, the inner wall of the compression-resistant layer is attached to the outer wall of the tensile layer, and the inner wall of the expansion-resistant layer is attached to the outer wall of the compression-resistant layer. The cable has stronger tensile and anti-pressure capabilities, the influence of thermal expansion and cold contraction on the cable sheath can be reduced, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a cable with a long service life. Background Art

[0002] A cable is a wire and cable composed of a conductor, an insulating layer, and a shielding layer, which is widely used in people's production and life to play the role of power transmission or signal transmission. The existing cables have very weak heat dissipation capacity, tensile strength, and compressive strength, so that the cables are often damaged due to dragging and friction, conductor heating, thermal expansion and contraction, etc., affecting the service life of the cables.

[0003] In the prior art, the utility model patent with the authorization announcement number CN 219457218 U discloses an anti-interference cable, including a cable sleeve, four heat-conducting members are fixedly connected in the cable sleeve, two adjacent heat-conducting members are in contact with each other, a bearing core is fixedly connected to the heat-conducting member, an anti-interference sleeve is fixedly connected in the heat-conducting member, a conductor is fixedly connected in the anti-interference sleeve, and a heat-conducting sleeve is fixedly sleeved on the outer side of the cable sleeve. Through the arrangement of the heat-conducting member, the heat-conducting sleeve, the heat dissipation fins, and the heat dissipation bumps, the utility model can conduct heat treatment on the conductor, thereby improving the heat conduction and heat dissipation effects of the cable to extend the service life of the cable. Through the arrangement of the bearing core, the compressive performance of the cable can be improved, and under the action of the anti-interference sleeve, the anti-interference performance of the conductor can be improved, thereby improving the anti-interference effect of the cable. Under the action of the protective sleeve, the protective performance of the cable can be improved.

[0004] In the process of implementing the present utility model, the inventor found that there are at least the following problems in the prior art: 1. In the prior art, the bearing core of the cable can improve the tensile strength of the cable, but cannot improve the compressive strength, and the bearing core will also squeeze the cable conductors, increasing the risk of conductor breakage; 2. The ability of the cable outer skin to resist thermal expansion and contraction is weak. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present utility model develops a cable with a long service life, which has stronger tensile and compressive strengths, can reduce the influence of thermal expansion and contraction on the cable outer skin, and improve the service life of the cable.

[0006] The technical solution for the present utility model to solve the technical problem is as follows: An embodiment of the present utility model provides a cable with a long service life, which includes a conductor and an insulating layer. Multiple conductors are provided, and the insulating layer wraps the conductors. A protective layer is provided outside the insulating layer. The protective layer includes a tensile layer, a compressive layer, and an anti-expansion layer. The anti-expansion layer is arranged at the outermost. The anti-expansion layer is a tubular made of elastic rubber material; the compressive layer is a spiral sleeve wound by steel wires, and the cross-section of the steel wires is rectangular or circular; the tensile layer is a plastic cylinder, and multiple wire cores are uniformly arranged along the axial direction in the tensile layer. The wire cores are plastic drawn wires; the tensile layer, the compressive layer, and the anti-expansion layer are arranged in sequence from the inside to the outside. The inner wall of the tensile layer fits with the outer wall of the insulating layer, the inner wall of the compressive layer fits with the outer wall of the tensile layer, and the inner wall of the anti-expansion layer fits with the outer wall of the compressive layer; a filling layer is also provided between the insulating layer and the tensile layer and between the insulating layers. The outer wall of the filling layer fits with the inner wall of the tensile layer. Guide holes corresponding to each insulating layer are provided in the filling layer, and the insulating layer passes through the guide holes. The outer wall of the insulating layer fits with the inner wall of the guide holes; the filling layer includes multiple support frames, and the support frames are arranged at intervals; the support frames are cylindrical, and multiple guide holes are arranged along the axial direction inside the support frames. The support frames are made of hard plastic; a rubber sleeve is provided between two adjacent support frames. The rubber sleeve is cylindrical, and multiple guide holes are arranged along the axial direction inside the rubber sleeve; multiple protrusions are arranged at intervals along the axial direction on the anti-expansion layer. The protrusions are arc-shaped, and the thickness of the protrusion part is the same as the thickness of the anti-expansion layer; a wear-resistant layer is also provided outside the anti-expansion layer. The wear-resistant layer can resist the damage to the outer skin caused by the friction with the ground when the cable is dragged during the cable installation process; a flame-retardant layer is also provided inside the insulating layer. The flame-retardant layer can prevent the fire caused by the heat generated when the conductor is overloaded.

[0007] The effects provided in the utility model content are only the effects of the embodiments, rather than all the effects of the utility model. The above technical solutions have the following advantages or beneficial effects:

[0008] 1. The tensile layer is made of plastic material, and the wire cores are made of the same or similar material as the main body part of the tensile layer, with the same thermal deformation. The plastic drawn wires have strong tensile ability and are not easily deformed. By setting plastic drawn wires in the tensile layer, the tensile ability of the cable can be improved. When the cable is suspended, it can offset the tensile deformation caused by its own weight; the steel wire spiral sleeve has the ability to bend and can resist external pressure. By setting a compressive layer composed of a steel wire spiral sleeve, the compressive ability of the cable can be improved; by setting the anti-expansion layer as a tubular made of elastic rubber material, the outer skin of the cable has good deformation and anti-fatigue abilities and can resist the influence of thermal expansion and contraction. This cable has stronger tensile and compressive abilities, can reduce the influence of thermal expansion and contraction on the outer skin of the cable, and improve the service life of the cable.

[0009] 2. The support frame plays a supporting role. The rubber sleeve is deformable, and the support frame squeezes the rubber sleeve to achieve cable bending. When the metal inside the cable expands due to heat, the anti-expansion layer stretches accordingly, and the protrusions are straightened, offsetting the deformation caused by heat expansion; when the cable shrinks due to cold, the anti-expansion layer contracts and pushes up the protrusions, offsetting the deformation caused by cold. By axially arranging a plurality of protrusions on the anti-expansion layer, the influence of thermal expansion and contraction on the cable outer skin can be better reduced, and the service life of the cable can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The front view of an embodiment of the present utility model.

[0011] Figure 2 The right view of an embodiment of the present utility model.

[0012] Figure 3 is Figure 2 The sectional view along the C-C direction.

[0013] Figure 4 is Figure 2 The three-dimensional view after sectional view along the C-C direction.

[0014] Figure 5 The three-dimensional view of an embodiment of the present utility model.

[0015] Figure 6 The three-dimensional view of an embodiment of the present utility model with the anti-expansion layer hidden.

[0016] Figure 7 The front view of the anti-expansion layer in an embodiment of the present utility model.

[0017] Figure 8 is Figure 7 The sectional view along the A-A direction.

[0018] Figure 9 The three-dimensional view of the filling layer in an embodiment of the present utility model.

[0019] Wherein: 1. Conducting wire, 2. Insulating layer, 3. Filling layer, 4. Tensile layer, 5. Core, 6. Compressive layer, 7. Anti-expansion layer, 31. Support frame, 32. Rubber sleeve, 71. Protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to clearly illustrate the technical features of the present solution, the present invention will be elaborated in detail below through specific embodiments and in conjunction with its accompanying drawings.

[0021] Figures 1 to 9 This is the first embodiment of the present utility model, as shown in Figure 2 , Figure 3As shown in the figure, a cable with a long service life includes a conductor 1 and an insulating layer 2. Four conductors 1 are provided, and the insulating layer 2 wraps the conductor 1. A protective layer is provided outside the insulating layer 2. The protective layer includes a tensile layer 4, a compressive layer 6, and an anti-expansion layer 7. The anti-expansion layer 7 is arranged on the outermost side, and the anti-expansion layer 7 is a tubular made of elastic rubber material; as Figure 6 shown in the figure, the compressive layer 6 is a spiral sleeve wound by steel wires, and the cross-section of the steel wire is rectangular; the tensile layer 4 is a plastic cylinder, and a plurality of wire cores 5 are uniformly arranged along the axial direction in the tensile layer 4. The wire cores 5 are plastic drawn wires; the tensile layer 4, the compressive layer 6, and the anti-expansion layer 7 are arranged in sequence from the inside to the outside. The inner wall of the tensile layer 4 fits with the outer wall of the insulating layer 2, the inner wall of the compressive layer 6 fits with the outer wall of the tensile layer 4, and the inner wall of the anti-expansion layer 7 fits with the outer wall of the compressive layer 6.

[0022] The tensile layer 4 is made of plastic material. The wire core 5 is made of the same or similar material as the main part of the tensile layer 4, and has the same thermal deformation. The plastic drawn wire has strong tensile ability and is not easy to deform. By arranging the plastic drawn wire in the tensile layer 4, the tensile ability of the cable can be improved, and the tensile deformation caused by its own weight can be offset when the cable is suspended; the steel wire spiral sleeve has the ability to bend and can resist external pressure. By arranging the compressive layer 6 composed of the steel wire spiral sleeve, the compressive ability of the cable can be improved; by arranging the anti-expansion layer 7 as a tubular made of elastic rubber material, the cable outer skin has good deformation and anti-fatigue ability and can resist the influence of thermal expansion and contraction. This cable has stronger tensile and compressive abilities, can reduce the influence of thermal expansion and contraction on the cable outer skin, and improve the service life of the cable.

[0023] A filling layer 3 is also provided between the insulating layer 2 and the tensile layer 4 and between the insulating layers 2. The outer wall of the filling layer 3 fits with the inner wall of the tensile layer 4. Guide holes corresponding to each insulating layer 2 are provided in the filling layer 3, and the insulating layer 2 passes through the guide holes, and the outer wall of the insulating layer 2 fits with the inner wall of the guide holes.

[0024] As Figure 9 shown in the figure, the filling layer 3 includes a plurality of support frames 31, and the support frames 31 are arranged at intervals. The support frames 31 are cylindrical, and a plurality of guide holes are arranged along the axial direction inside the support frames 31. The support frames 31 are made of hard plastic. A rubber sleeve 32 is arranged between two adjacent support frames 31. The rubber sleeve 32 is cylindrical, and a plurality of guide holes are arranged along the axial direction inside the rubber sleeve 32. The support frames 31 play a supporting role, and the rubber sleeve 32 can be deformed. The support frames 31 squeeze the rubber sleeve 32 to realize cable bending.

[0025] As Figure 8As shown, a plurality of protrusions 71 are arranged at intervals along the axial direction on the anti-expansion layer 7. The protrusions 71 are arc-shaped, and the thickness of the protrusion 71 part is the same as the thickness of the anti-expansion layer 7. When the metal inside the cable expands due to heat, the anti-expansion layer 7 follows the stretching, and the protrusions 71 are straightened, offsetting the thermal expansion deformation; when the cable contracts due to cold, the anti-expansion layer 7 shrinks and pushes up the protrusion 71 part, offsetting the cold deformation. By arranging a plurality of protrusions 71 at intervals along the axial direction on the anti-expansion layer 7, the influence of thermal expansion and contraction on the cable outer skin can be better reduced, and the service life of the cable can be improved.

[0026] A wear-resistant layer is further arranged outside the anti-expansion layer 7. The wear-resistant layer can resist the damage to the outer skin caused by the friction between the cable and the ground during the cable dragging process during the cable installation. A flame-retardant layer is further arranged inside the insulating layer 2. The flame-retardant layer can prevent the fire caused by the heat generated when the wire 1 is overloaded.

[0027] Although the specific implementation manners of the utility model are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the utility model. Based on the technical solution of the utility model, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the utility model.

Claims

1. A cable with a long service life, comprising a conductor (1) and an insulating layer (2), wherein a plurality of conductors (1) are provided, the insulating layer (2) wraps the conductor (1), and a protective layer is provided outside the insulating layer (2), wherein: The protective layer comprises a tensile layer (4), a compression layer (6), and an anti-expansion layer (7); the anti-expansion layer (7) is arranged at the outermost part, and is in the shape of a tube made of elastic rubber material; the compression layer (6) is a spiral sleeve wound by steel wire, and the cross section of the steel wire is rectangular or circular; the tensile layer (4) is a plastic cylinder, and a plurality of wire cores (5) are evenly arranged in the axial direction in the tensile layer (4), and the wire cores (5) are plastic wire drawing wires; The layer (4), the pressure-resistant layer (6), and the anti-expansion layer (7) are sequentially arranged from the inside to the outside, the inner wall of the anti-tension layer (4) is in contact with the outer wall of the insulating layer (2), the inner wall of the pressure-resistant layer (6) is in contact with the outer wall of the pressure-resistant layer (4), and the inner wall of the anti-expansion layer (7) is in contact with the outer wall of the pressure-resistant layer (6); a filling layer (3) is further arranged between the insulating layer (2) and the anti-tension layer (4), and between the insulating layers (2) and the insulating layers (2), and the outer wall of the filling layer (3) is in contact with the outer wall of the pressure-resistant layer (4). ), the filling layer (3) is provided with guide holes corresponding to each insulating layer (2), the insulating layer (2) passes through the guide holes, and the outer wall of the insulating layer (2) is in contact with the inner wall of the guide holes; the filling layer (3) comprises a plurality of support frames (31), and the support frames (31) are arranged at intervals; the support frames (31) are cylindrical, and a plurality of guide holes are arranged axially inside the support frames (31), and the support frames (31) are made of hard plastic; a rubber sleeve (32) is arranged between two adjacent support frames (31), the rubber sleeve (32) is cylindrical, and a plurality of guide holes are arranged axially inside the rubber sleeve (32); a plurality of protrusions (71) are arranged axially at intervals on the anti-expansion layer (7), the protrusions (71) are arc-shaped, and the thickness of the protrusions (71) is the same as the thickness of the anti-expansion layer (7); a wear-resistant layer is also arranged on the outside of the anti-expansion layer (7); and a flame-retardant layer is also arranged on the inside of the insulating layer (2).

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