Control cable with shielding structure

Abstract

The utility model discloses a control cable with a shielding structure, which comprises a filling strip, a plurality of leads are uniformly distributed on the outer side of the filling strip, the filling strip and the plurality of leads are wrapped by an outer wrapping layer, an outer shielding layer is wrapped on the outer side of the outer wrapping layer, and an outer sheath is wrapped on the outer side of the outer shielding layer. Each wire comprises two parallel core wires, the two core wires are wrapped by an inner wrapping layer, and the outer side of the inner wrapping layer is wrapped by an inner shielding layer; the inner shielding layer and the outer shielding layer are respectively provided with a shielding layer main body and a turnover structure, the head end and the tail end of the shielding layer main body are mutually overlapped, and the turnover structure is arranged outside the shielding layer main body. According to the utility model, the head and tail parts of the shielding layer are provided with the folding structures, so that the shielding performance of the head and tail joint is improved; according to the invention, a good shielding effect is ensured, circular tube shielding and multi-layer shielding are not needed, and the flexibility of the cable is not affected.

Description

Technical Field

[0001] This utility model relates to the field of control cable technology, specifically a control cable with a shielded structure. Background Technology

[0002] Cables are mainly composed of conductors and multiple layers covering the conductors. The simplest cables only have conductors and insulation layers. However, existing cables need to transmit power and signals, generate heat during operation, and connect increasingly complex devices. Therefore, the requirements for cables are higher, requiring better shielding, insulation, flame retardancy, and effective control of the cable's operating temperature.

[0003] A composite control cable disclosed in CN113990576B includes a first core, a second core, and a third core. Each core is externally fitted with a fire-resistant copper tube, the inner diameter of which is larger than the outer diameter of each core, creating a gap between the tube and the core. A shielding copper sheet is installed within this gap. The shielding copper sheet has a vertical cross-section of a ring-shaped sinusoidal structure, forming a closed structure when connected end-to-end. The core is positioned within this closed space, with the shielding copper sheet extending axially along the fire-resistant copper tube. The inner apex of the shielding copper sheet presses against the core. All three cores are externally fitted with fire-resistant copper tubes, which possess good fire resistance and shielding properties, thus enhancing both fire resistance and shielding effectiveness.

[0004] While existing technologies can achieve a certain degree of shielding, they rely on copper tubing for shielding, resulting in relatively poor cable flexibility. Traditional open-type shielding layers cannot guarantee good shielding performance. Therefore, how to ensure good shielding performance of the cable without affecting its flexibility is the technical problem we need to solve. Utility Model Content

[0005] The purpose of this invention is to provide a control cable with a shielded structure to solve the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a control cable with a shielding structure, comprising a filler strip, wherein multiple conductors are evenly distributed on the outer side of the filler strip, and the filler strip and the multiple conductors are covered by an outer wrapping layer, wherein an outer shielding layer is covered on the outer side of the outer wrapping layer, and an outer sheath is covered on the outer side of the outer shielding layer; each conductor comprises two parallel core wires, the two core wires are covered by an inner wrapping layer, wherein an inner shielding layer is covered on the outer side of the inner wrapping layer; the inner shielding layer and the outer shielding layer are composed of a shielding layer body and a folding structure, wherein the first and last ends of the shielding layer body overlap each other, and the folding structure is provided on the outside of the shielding layer body.

[0007] Preferably, the gap between the outer wrapping layer covering the filler strip and the wire is filled with flame-retardant filler.

[0008] Preferably, the core wire consists of a conductor and an insulating layer, with the conductor covered by the insulating layer.

[0009] Preferably, the conductor is a single copper conductor or a stranded copper wire conductor, and the insulation layer is a polyvinyl chloride layer.

[0010] Preferably, the outer and inner wrapping layers are made of flame-retardant wrapping tape; the outer sheath is made of cross-linked polyethylene sheath.

[0011] Preferably, the filler strip has a circular cross-sectional shape and is made of rubber.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The inner and outer shielding layers consist of a shielding body and a folded structure. The first and last ends of the shielding body overlap each other, and a folded structure is provided on the outside of the shielding body. The folded structure at the beginning and end of the shielding layer improves the shielding performance at the junction. This application ensures a good shielding effect without the need for circular tube shielding or multi-layer shielding, and does not affect the flexibility of the cable.

[0014] Flame-retardant filler is used to fill the gap between the outer sheath and the conductor. The flame-retardant filler gives the cable a certain flame-retardant property. Flame-retardant wrapping tape is used for both the outer and inner sheaths to further improve the flame-retardant effect of the cable. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the shielding layer of this utility model.

[0018] In the diagram: 1. Inner shielding layer; 2. Inner wrapping layer; 3. Conductor; 4. Insulation layer; 5. Flame-retardant filler; 6. Filler strip; 7. Outer wrapping layer; 8. Outer shielding layer; 9. Outer sheath; 11. Shielding layer body; 12. Folded structure. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0020] Please see Figure 1 In this embodiment of the present invention, a control cable with a shielding structure includes a filler strip 6, on the outer side of which multiple conductors are evenly distributed. The filler strip 6 and the multiple conductors are covered by an outer wrapping layer 7. The gap between the outer wrapping layer 7 and the conductors is filled with flame-retardant filler 5, which gives the cable a certain flame-retardant performance. An outer shielding layer 8 is covered on the outer side of the outer wrapping layer 7, and an outer sheath 9 is covered on the outer side of the outer shielding layer 8. The outer wrapping layer 7 and the inner wrapping layer 2 are made of flame-retardant wrapping tape, which further improves the flame-retardant effect of the cable. The outer sheath 9 is made of cross-linked polyethylene. The filler strip 6 has a circular cross-sectional shape and is made of rubber. The cylindrical filler strip improves the roundness of the cable and enhances its tensile strength.

[0021] The conductor includes two parallel core wires, which are wrapped by an inner sheath 2. An inner shielding layer 1 is wrapped around the outer side of the inner sheath 2. The core wire is composed of a conductor 3 and an insulation layer 4. The outer side of the conductor 3 is wrapped with an insulation layer 4. The conductor 3 is a single copper conductor or a copper wire stranded conductor, and the insulation layer 4 is a polyvinyl chloride layer.

[0022] like Figure 2The inner shielding layer 1 and the outer shielding layer 8 are composed of a shielding layer body 11 and a folding structure 12. The first and last ends of the shielding layer body 11 overlap each other, and the folding structure 12 is provided on the outside of the shielding layer body 11. The folding structure 12 is provided at the first and last ends of the shielding layer, which improves the shielding performance at the junction of the first and last ends. This application ensures a good shielding effect without the need for circular tube shielding or multi-layer shielding, and does not affect the flexibility of the cable.

[0023] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A control cable with a shielded structure, comprising a filler strip (6), characterized in that: Multiple wires are evenly distributed on the outer side of the filler strip (6). The filler strip (6) and the multiple wires are covered by an outer wrapping layer (7). An outer shielding layer (8) is covered on the outer side of the outer wrapping layer (7). An outer sheath (9) is covered on the outer side of the outer shielding layer (8). The conductor includes two parallel core wires, which are covered by an inner cladding (2), and an inner shielding layer (1) is covered on the outside of the inner cladding (2). The inner shielding layer (1) and the outer shielding layer (8) are composed of a shielding layer body (11) and a folding structure (12). The first and last ends of the shielding layer body (11) overlap each other, and the folding structure (12) is provided on the outside of the shielding layer body (11).

2. A control cable with a shielded structure according to claim 1, characterized in that: The gap between the outer wrapping layer (7) covering the filler strip (6) and the wire is filled with flame-retardant filler (5).

3. A control cable with a shielded structure according to claim 1, characterized in that: The core wire consists of a conductor (3) and an insulating layer (4), with the conductor (3) covered by the insulating layer (4).

4. A control cable with a shielded structure according to claim 3, characterized in that: The conductor (3) is a single copper conductor or a copper wire stranded conductor, and the insulation layer (4) is a polyvinyl chloride layer.

5. A control cable with a shielded structure according to claim 1, characterized in that: The outer wrapping layer (7) and the inner wrapping layer (2) are made of flame-retardant wrapping tape; the outer sheath (9) is made of cross-linked polyethylene sheath.

6. A control cable with a shielded structure according to claim 1, characterized in that: The cross-sectional shape of the filler strip (6) is circular, and the filler strip (6) is made of rubber.

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