High-flexibility multi-core PVC insulating sheath wire

Abstract

The utility model relates to a high-flexibility multi-core PVC (polyvinyl chloride) insulating sheath wire, which comprises a plurality of core wires, an outer insulating layer arranged outside the plurality of core wires, foaming filler arranged between the outer insulating layer and each core wire, a shielding layer arranged outside the outer insulating layer, and a PVC insulating sheath arranged outside the shielding layer. Each core wire comprises a wire and an inner insulating layer extruded outside the wire. According to the utility model, firstly, the foaming filler is arranged between the outer insulating layer and each core wire, so that each core wire has a deformation space when being bent, and the foaming filler can be compressed, thereby eliminating the interaction force of each core wire, and enabling the whole wire to be bent more easily, namely, the flexibility of the wire is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, and in particular relates to a high-flexibility multi-core PVC insulated sheathed electric wire. Background Art

[0002] Multi-core wires and cables are difficult to bend due to the large number of cores, so they are difficult to be used on some moving parts to follow the movement, such as repeatedly bending and stretching to follow the movement of a mechanical claw. Therefore, single-core cables are often used to connect moving parts, which results in multiple single-core cables being connected to one moving part. In order to avoid interference and entanglement between the cables, drag chains are usually used to limit the cables and guide the cables to bend.

[0003] At present, this model has technical problems such as complex assembly structure and high manufacturing cost. Therefore, it is urgent to develop highly flexible multi-core cables. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a highly flexible multi-core PVC insulated sheathed electric wire, so as to solve the technical problem that traditional multi-core electric wires and cables are difficult to bend due to the large number of core wires.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a highly flexible multi-core PVC insulated sheathed electric wire, comprising multiple core wires, an outer insulating layer is arranged outside the multiple core wires, a foam filler is arranged between the outer insulating layer and each core wire, a shielding layer is arranged outside the outer insulating layer, and a PVC insulating sheath is arranged outside the shielding layer, the core wire comprises a conductor and an inner insulating layer extruded outside the conductor, the multiple core wires are discretely distributed, one of the core wires is centrally arranged, and the other core wires are circumferentially evenly distributed around the centrally arranged core wire, and the core wires located on the periphery are spirally extended along the same rotation direction, and the helix angle of the spirally extended core wire is between 80° and 90°.

[0006] As a preferred embodiment, the shielding layer includes a first copper wire mesh, which is formed by cross-weaving a plurality of left-handed copper wires and a plurality of right-handed copper wires, the diameters of the left-handed copper wires and the right-handed copper wires are equal, and the mesh diameter of the first copper wire mesh is 2-4 times the diameter of the left-handed copper wire. The first copper wire mesh is coated on the outside of the outer insulating layer, and foam fillers are provided between the first copper wire mesh and the outer insulating layer, and between the first copper wire mesh and the PVC insulating sheath.

[0007] As a preferred solution, the shielding layer also includes a second copper wire mesh, the structure of the second copper wire mesh is the same as that of the first copper wire mesh but is staggered, the second copper wire mesh is covered on the outside of the first copper wire mesh, any node of the second copper wire mesh is opposite to the mesh center of the first copper wire mesh, and foam filler is arranged between the second copper wire mesh, the first copper wire mesh and the PVC insulating sheath.

[0008] The beneficial effects of the utility model are as follows: firstly, the utility model provides a foam filler between the outer insulating layer and each core wire, so that each core wire has space for deformation when bending, and the foam filler can be compressed, thereby eliminating the mutual force of each core wire, making the whole wire easier to bend, that is, the wire is more flexible.

[0009] The utility model further adopts a woven first copper wire mesh as a shielding layer. The nodes of the woven copper wire mesh are not fixedly connected and are therefore relatively movable. When foam fillers are respectively arranged inside and outside the first copper wire mesh, the left-handed copper wires and right-handed copper wires of the first copper wire mesh can change their positions under the action of force when the wire is bent, thereby reducing the resistance to the bending of the wire and making the wire softer and easier to bend.

[0010] The utility model further adds a second copper wire mesh in order to improve the shielding effect of the shielding layer, and the structure of the second copper wire mesh is the same as that of the first copper wire mesh, so the second copper wire mesh will not affect the flexibility of the wire.

[0011] The utility model also sets the position of each core wire and spirally extends the outer core wire, so that any outer core wire itself has a certain degree of bending. When the wire is bent, the core wire will not form a strong bending resistance. The elastic deformation ability of the foam filler is used to effectively improve the flexibility of the multi-core PVC insulated sheathed wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0013] Figure 1 It is a cross-sectional view of a specific structure of the electric wire described in the utility model;

[0014] Figure 2 It is a cross-sectional view of another specific structure of the electric wire described in the utility model;

[0015] Figure 1 and Figure 2 In: 1. Core wire, 1a. Guide, 1b. Inner insulation layer, 2. Outer insulation layer, 3. Shielding layer, 3a. First copper wire mesh, 3b. Second copper wire mesh, 4. PVC insulation sheath, 5. Foam filler. DETAILED DESCRIPTION

[0016] The specific implementation scheme of the utility model is described in detail below in conjunction with the accompanying drawings.

[0017] like Figure 1The highly flexible multi-core PVC insulated sheathed electric wire shown comprises a plurality of core wires 1, an outer insulating layer 2 is arranged outside the plurality of core wires 1, a foam filler 5 is arranged between the outer insulating layer 2 and each core wire 1, a shielding layer 3 is arranged outside the outer insulating layer 2, a PVC insulating sheath 4 is arranged outside the shielding layer 3, the core wire 1 comprises a conductor 1a and an inner insulating layer 1b extruded outside the conductor 1a, the plurality of core wires 1 are discretely distributed, one of the core wires 1 is centrally arranged, the other core wires 1 are circumferentially evenly distributed around the centrally arranged core wire 1, the core wires 1 located at the periphery are spirally extended along the same rotation direction, and the spiral angle of the spirally extended core wire 1 is between 80° and 90°.

[0018] In this embodiment, the shielding layer 3 includes a first copper wire mesh 3a, which is formed by cross-weaving a plurality of left-handed copper wires and a plurality of right-handed copper wires. The diameters of the left-handed copper wires and the right-handed copper wires are equal, and the mesh diameter of the first copper wire mesh 3a is 2-4 times the diameter of the left-handed copper wire. The first copper wire mesh 3a is coated on the outside of the outer insulating layer 2, and foam filler 5 is provided between the first copper wire mesh 3a and the outer insulating layer 2, and between the first copper wire mesh 3a and the PVC insulating sheath 4.

[0019] like Figure 2 As shown, in actual application, in order to improve the shielding effect of the shielding layer 3, the shielding layer 3 also includes a second copper wire mesh 3b. The structure of the second copper wire mesh 3b is the same as that of the first copper wire mesh 3b but is staggered. The second copper wire mesh 3b is covered on the outside of the first copper wire mesh 3a. Any node of the second copper wire mesh 3b is opposite to the mesh center of the first copper wire mesh 3a. Foam filler 5 is arranged between the second copper wire mesh 3b and the first copper wire mesh 3a and the PVC insulating sheath 4.

[0020] The working principle of the utility model is as follows: the utility model firstly arranges a foam filler 5 between the outer insulating layer 2 and each core wire 1, so that each core wire 1 has space for deformation when bending, and the foam filler 5 can be compressed, thereby eliminating the interaction force of each core wire 1, making the whole wire easier to bend, that is, the wire is more flexible.

[0021] A woven first copper wire mesh 3a is used as the shielding layer 3, and the nodes of the woven copper wire mesh are not fixedly connected, so the left-handed copper wires and the right-handed copper wires can move relatively. When foam fillers 5 are respectively arranged inside and outside the first copper wire mesh 3a, when the wire is bent, the left-handed copper wires and the right-handed copper wires of the first copper wire mesh 3a can change their positions under the action of force, thereby reducing the resistance to the bending of the wire, making the wire softer and easier to bend.

[0022] By setting the position of each core wire 1 and spirally extending the outer core wire 1, any outer core wire 1 itself has a certain degree of bending. When the wire is bent, the core wire 1 will not form a strong bending resistance. The elastic deformation ability of the foam filler 5 can effectively improve the flexibility of the multi-core PVC insulated sheathed wire.

[0023] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A highly flexible multi-core PVC insulated sheathed electric wire, comprising a plurality of core wires (1), characterized in that: An outer insulating layer (2) is arranged outside the plurality of core wires (1), a foam filler (5) is arranged between the outer insulating layer (2) and each core wire (1), a shielding layer (3) is arranged outside the outer insulating layer (2), and a PVC insulating sheath (4) is arranged outside the shielding layer (3), the core wire (1) comprises a conductor (1a) and an inner insulating layer (1b) extruded outside the conductor (1a), the plurality of core wires (1) are discretely distributed, one core wire (1) is centrally arranged, the other core wires (1) are circumferentially uniformly distributed around the centrally arranged core wire (1), the core wires (1) located at the periphery are spirally extended along the same direction of rotation, and the spiral angle of the spirally extended core wire (1) is between 80° and 90°.

2. The highly flexible multi-core PVC insulated sheathed electric wire according to claim 1, characterized in that: The shielding layer (3) comprises a first copper wire mesh (3a), the first copper wire mesh (3a) being formed by cross-weaving a plurality of left-handed copper wires and a plurality of right-handed copper wires, the diameters of the left-handed copper wires and the right-handed copper wires being equal, the mesh diameter of the first copper wire mesh (3a) being 2-4 times the diameter of the left-handed copper wires, the first copper wire mesh (3a) being coated on the outside of the outer insulating layer (2), and a foam filler (5) being provided between the first copper wire mesh (3a) and the outer insulating layer (2), and between the first copper wire mesh (3a) and the PVC insulating sheath (4).

3. The highly flexible multi-core PVC insulated sheathed electric wire according to claim 2, characterized in that: The shielding layer (3) further comprises a second copper wire mesh (3b), the structure of the second copper wire mesh (3b) being the same as that of the first copper wire mesh (3a) but being arranged in a staggered manner, the second copper wire mesh (3b) being coated on the outside of the first copper wire mesh (3a), any node of the second copper wire mesh (3b) being opposite to the mesh center of the first copper wire mesh (3a), and a foam filler (5) being arranged between the second copper wire mesh (3b), the first copper wire mesh (3a) and the PVC insulating sheath (4).

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