Anti-interference control cable

Abstract

The present invention provides an anti-interference control cable, which belongs to the technical field of cable production, and includes a wire core, a central filling layer, a protective layer, and an outer shielding layer. The central filling layer is filled around the wire core to fix and protect the wire core. The protective layer is coated on the outside of the wire core and the central filling layer; when the outer side of the protective layer is squeezed, it can be deformed toward the inner wall of the protective layer. The outer shielding layer is coated on the outside of the protective layer. In the anti-interference control cable provided by the present invention, when the cable is bent, the deformation degree of the outer shielding layer on the inner side of the bending arc segment is less than that of the outer shielding layer on the outer side of the bending arc segment, so the outer shielding layer on the inner side of the bending arc segment will squeeze the wire core. When the outer shielding layer on the inner side of the bending arc segment begins to squeeze the wire core, the pressure applied by the outer shielding layer directly acts on the protective layer, and the protective layer is deformed by force, thereby weakening the pressure applied by the outer shielding layer, avoiding the pressure from acting on the wire core, thereby protecting the wire core.

Description

Technical Field

[0001] The invention belongs to the technical field of cables, and more specifically, relates to an anti-interference control cable. Background Art

[0002] Control cables usually use copper tape shielding and copper mesh shielding to prevent interference. Copper tape shielding is to wrap copper tape around the outside of the cable to build a shielding layer on the outside of the cable. Copper mesh shielding is to use copper wire to weave a copper mesh on the outside of the cable to build a shielding layer on the outside of the cable. The copper tape shielding method has a better shielding effect, but the bending performance of the cable will deteriorate after using the copper tape shielding method. When the copper tape at the curved arc section is bent, it will deform toward the center of the cable and squeeze the wire core in the center of the cable. If the bending radius is too small, it will damage the cable. Therefore, the bending performance of the cable with copper tape shielding is poor. Summary of the invention

[0003] The object of the present invention is to provide an anti-interference control cable, aiming to solve the problem of poor bending performance of cables using copper tape shielding in the prior art.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide an anti-interference control cable, comprising:

[0005] Wire core;

[0006] A central filling layer, filled around the wire core, for fixing and protecting the wire core;

[0007] A protective layer, covering the outside of the wire core and the central filling layer; the protective layer includes an air bag, and the air bag is deformed after being squeezed; and

[0008] The outer shielding layer is coated on the outside of the protective layer.

[0009] In a possible implementation, the protective layer is formed by wrapping a protective tape around the core and the outside of the central filling layer; the protective tape includes:

[0010] Baseband; and

[0011] A plurality of air bags are fixed on the side of the base belt close to the outer shielding layer; the plurality of air bags are evenly distributed on the base belt.

[0012] In a possible implementation manner, the width of the airbag is the same as the width of the base belt, and half of the airbag is fixed on the base belt so that the other half of the airbag covers the gap between adjacent base belts.

[0013] In a possible implementation, the width of the airbag is smaller than the width of the baseband, and a seal is provided on one side of the airbag, and the seal is used to seal the gaps between adjacent airbags and the gaps between adjacent basebands.

[0014] In a possible implementation, the central filling layer includes:

[0015] An interstrand rubber strip is arranged between adjacent wire cores; the interstrand rubber strip is hollow inside; and

[0016] A fixing rubber strip is filled between the wire core and the rubber strip between strands and is used to fix the wire core and the rubber strip between strands.

[0017] In a possible implementation, it further includes a connecting rubber strip disposed in the middle of the inter-thigh rubber strip, and the connecting rubber strip is connected to the inter-thigh rubber strip.

[0018] In a possible implementation manner, the outer shielding layer is a copper tape shielding layer.

[0019] In a possible implementation manner, the wire core is coated with an inner insulation layer.

[0020] In a possible implementation manner, an inner shielding layer is provided outside the inner insulating layer.

[0021] In a possible implementation, it further includes an outer insulating layer covering the outer shielding layer.

[0022] The beneficial effect of the anti-interference control cable provided by the present invention is that compared with the prior art, when the anti-interference control cable of the present invention is bent, the outer shielding layer on the inner side of the bending arc segment is less deformed than the outer shielding layer on the outer side of the bending arc segment, so the outer shielding layer on the inner side of the bending arc segment will squeeze the wire core. When the outer shielding layer on the inner side of the bending arc segment begins to squeeze the wire core, the pressure applied by the outer shielding layer directly acts on the protective layer, and the protective layer is deformed by force, thereby weakening the pressure applied by the outer shielding layer, avoiding the pressure from acting on the wire core, and thus protecting the wire core. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of an anti-interference control cable provided by an embodiment of the present invention;

[0025] Figure 2A schematic diagram of the structure of a protective layer provided by an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of a protection band provided by an embodiment of the present invention;

[0027] Figure 4 Another schematic diagram of the structure of the protection band provided by the embodiment of the present invention;

[0028] Figure 5 A schematic diagram of the structure of a central filling layer provided in an embodiment of the present invention;

[0029] Figure 6 Another structural schematic diagram of the central filling layer provided in an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1. Wire core; 11. Inner insulation layer; 12. Inner shielding layer; 2. Center filling layer; 21. Inter-strand rubber strip; 22. Fixing rubber strip; 23. Connecting rubber strip; 3. Protective layer; 31. Base tape; 32. Airbag; 33. Seal; 4. Outer shielding layer; 5. Outer insulation layer. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] Reference Figure 1 and Figure 6 , the anti-interference control cable provided by the present invention is now described.

[0034] Control cables usually have a small shielding layer outside each strand. The small shielding layer only protects the wrapped strands and is used to isolate the strands to prevent the transmission signals between the strands from interfering with each other. At the same time, a large shielding layer is set for each strand as a whole. The large shielding layer wraps all the strands to prevent external signals from interfering with the signals on the strands and to prevent the electrical signals on the strands from leaking. The large shielding layer of the control cable usually uses copper tape shielding or copper mesh shielding.

[0035] Copper tape shielding refers to wrapping a layer of copper tape around the cable conductor to block interference from external interference signals and protect internal signals; while copper wire shielding refers to wrapping a layer of mesh shielding woven from copper wire around the cable conductor, which can also effectively shield external signal interference. The principles of copper tape shielding and copper wire shielding are different. Copper tape shielding forms a protective environment to resist signal interference by closing the outside of the conductor, while copper wire shielding forms a mesh structure to resist signal interference by weaving. The structure of copper tape shielding is simpler than that of copper wire shielding. It is sufficient to simply wrap a layer of copper tape around the conductor; while copper wire shielding requires the use of professional equipment such as a weaving machine to weave the copper wire into a mesh shielding body, which is more difficult to produce than copper tape shielding.

[0036] Copper tape shielding is suitable for scenarios where the cable pressure is small and there are fewer bends, and can provide better shielding performance and anti-interference capabilities. Copper wire shielding is suitable for scenarios where cables or wire harnesses need to be bent frequently. Due to its light structure and good flexibility, it will not affect the bending degree of the wire harness during the bending process. The shielding layer composed of copper tape will exert pressure on the wire core when it is bent. When the bending radius of the cable is small, the pressure exerted by the copper tape shielding layer on the wire core will damage the wire core, thereby affecting the cable transmission signal. In order to solve the problem of poor bending performance of the copper tape shielding layer, this embodiment provides an anti-interference control cable.

[0037] Reference Figure 1 The anti-interference control cable provided by the embodiment of the present invention comprises a core 1, a central filling layer 2, a protective layer 3 and an outer shielding layer 4. The central filling layer 2 is filled around the core 1 to fix and protect the core 1. The protective layer 3 is coated on the outside of the core 1 and the central filling layer 2; when the outer side of the protective layer 3 is squeezed, it can be deformed toward the inner wall direction of the protective layer 3. The outer shielding layer 4 is coated on the outside of the protective layer 3.

[0038] Compared with the prior art, the anti-interference control cable provided by the present invention has a smaller deformation degree of the outer shielding layer 4 on the inner side of the curved arc segment than that of the outer shielding layer 4 on the outer side of the curved arc segment when the cable is bent, so the outer shielding layer 4 on the inner side of the curved arc segment will squeeze the wire core 1. When the outer shielding layer 4 on the inner side of the curved arc segment begins to squeeze the wire core 1, the pressure applied by the outer shielding layer 4 directly acts on the protective layer 3, and the protective layer 3 is deformed by the force, thereby weakening the pressure applied by the outer shielding layer 4, avoiding the pressure from acting on the wire core 1, and thus protecting the wire core 1.

[0039] Reference Figure 2 In a possible implementation, the protective layer 3 is formed by wrapping a protective tape around the core 1 and the outside of the central filling layer 2; the protective tape includes: a base tape 31 and a plurality of air bags 32. The air bags 32 are fixed on the side of the base tape 31 close to the outer shielding layer 4; and the plurality of air bags 32 are evenly distributed on the base tape 31.

[0040] In a preferred embodiment, the material of the base band 31 is polyvinyl chloride, which is a common plastic material with high hardness and good plasticity. It can adjust the hardness by adding plasticizers to obtain polyvinyl chloride products with different hardness. Rigid polyvinyl chloride is commonly used in building pipes, doors and windows, plastic bottles, packaging, bank cards or membership cards, etc. After adding plasticizers, polyvinyl chloride can become soft and is suitable for pipes, cable insulation, flooring, signs, inflatable products, etc.

[0041] The airbag 32 is made of rubber material, and is filled with gas at a certain pressure. When the outer shielding layer 4 squeezes the protective layer 3, the airbag 32 first contacts the outer shielding layer 4, and then deforms under the squeezing of the outer shielding layer 4, providing deformation space for the deformation of the outer shielding layer 4. The base tape 31 is the basis of the protective tape, and the base tape 31 has a high hardness and is bendable. When the protective layer 3 is subjected to a large pressure, the airbag 32 is deformed by force. However, when the pressure is transmitted to the base tape 31, due to the high hardness of the base tape 31, a large deformation will not occur, thereby preventing the base tape 31 from deforming and squeezing the central filling layer 2 and the wire core 1, thereby protecting the wire core 1. When constructing the protective layer 3, the base tape 31 is attached to the side of the central filling layer 2, so that the airbag 32 is located on the outside, and the base tape 31 is tilted, and then the protective tape is wrapped around the outside of the central filling layer 2. When wrapping the protective tape, no gap is set between adjacent protective tapes to construct the protective layer 3.

[0042] In a preferred embodiment, the material of the base band 31 is polyvinyl chloride, which is a common plastic material with high hardness and good plasticity. It can adjust the hardness by adding plasticizers to obtain polyvinyl chloride products with different hardness. Rigid polyvinyl chloride is commonly used in building pipes, doors and windows, plastic bottles, packaging, bank cards or membership cards, etc. After adding plasticizers, polyvinyl chloride can become soft and is suitable for pipes, cable insulation, flooring, signs, inflatable products, etc.

[0043] The airbag 32 is made of rubber material and is filled with gas at a certain pressure. When the outer shielding layer 4 squeezes the protective layer 3, the airbag 32 first contacts the outer shielding layer 4, and then deforms under the squeezing of the outer shielding layer 4, providing deformation space for the deformation of the outer shielding layer 4. The base tape 31 is the basis of the protective tape, and the base tape 31 has a high hardness and is bendable. When the protective layer 3 is subjected to a large pressure, the airbag 32 is deformed by force. However, when the pressure is transmitted to the base tape 31, due to the high hardness of the base tape 31, a large deformation will not occur, thereby preventing the base tape 31 from deforming and squeezing the central filling layer 2 and the wire core 1, thereby protecting the wire core 1. When constructing the protective layer 3, the base tape 31 is attached to the side of the central filling layer 2, so that the airbag 32 is located on the outside, and the base tape 31 is tilted, and then the protective tape is wrapped around the outside of the central filling layer 2. When wrapping the protective tape, a certain gap is set between adjacent protective tapes to construct the protective layer 3.

[0044] In a preferred embodiment, the material of the base band 31 is a textile material, and the material of the airbag 32 is a rubber material, and the airbag 32 is filled with gas at a certain pressure. When the outer shielding layer 4 squeezes the protective layer 3, the airbag 32 first contacts the outer shielding layer 4, and then deforms under the squeezing of the outer shielding layer 4, providing deformation space for the deformation of the outer shielding layer 4. The base band 31 is the basis of the protective band, and the base band 31 has a high hardness and is bendable. When the protective layer 3 is subjected to a large pressure, the airbag 32 is deformed by force. However, when the pressure is transmitted to the base band 31, due to the high hardness of the base band 31, a large deformation will not occur, thereby avoiding the deformation of the base band 31 to squeeze the central filling layer 2 and the wire core 1, thereby protecting the wire core 1. When constructing the protective layer 3, the base band 31 is attached to the side of the central filling layer 2, so that the airbag 32 is located on the outside, and the base band 31 is tilted, and then the protective band is wrapped around the outside of the central filling layer 2. When wrapping the protective band, no gap is set between adjacent protective bands to construct the protective layer 3.

[0045] In a preferred embodiment, the material of the base band 31 is a textile material, and the material of the airbag 32 is a rubber material, and the airbag 32 is filled with gas at a certain pressure. When the outer shielding layer 4 squeezes the protective layer 3, the airbag 32 first contacts the outer shielding layer 4, and then deforms under the squeezing of the outer shielding layer 4, providing deformation space for the deformation of the outer shielding layer 4. The base band 31 is the basis of the protective band, and the base band 31 has a high hardness and is bendable. When the protective layer 3 is subjected to a large pressure, the airbag 32 is deformed by force. However, when the pressure is transmitted to the base band 31, due to the high hardness of the base band 31, a large deformation will not occur, thereby avoiding the deformation of the base band 31 to squeeze the central filling layer 2 and the wire core 1, thereby protecting the wire core 1. When constructing the protective layer 3, the base band 31 is attached to the side of the central filling layer 2, so that the airbag 32 is located on the outside, and the base band 31 is tilted, and then the protective band is wrapped around the outside of the central filling layer 2. When wrapping the protective band, a certain gap is set between adjacent protective bands to construct the protective layer 3.

[0046] Reference Figure 3 In a possible implementation, the width of the airbag 32 is the same as that of the base belt 31, and half of the airbag 32 is fixed on the base belt 31 so that the other half of the airbag 32 covers the gap between adjacent base belts 31. The airbag 32 and the base belt 31 are staggered, and when the protective belt is wrapped, the airbag 32 can be used to block the gap between adjacent base belts 31.

[0047] Reference Figure 4 In a possible implementation, the width of the airbag 32 is smaller than the width of the baseband 31 , and a seal 33 is provided on one side of the airbag 32 , and the seal 33 is used to block the gap between adjacent airbags 32 and the gap between adjacent basebands 31 .

[0048] Reference Figure 5 In a possible implementation, the central filling layer 2 includes: an inter-thigh rubber strip 21 and a fixing rubber strip 22 .

[0049] The interstrand rubber strip 21 is arranged between adjacent wire cores 1 ; the inner part of the interstrand rubber strip 21 is hollow. The fixing rubber strip 22 is filled between the wire core 1 and the interstrand rubber strip 21 to fix the wire core 1 and the interstrand rubber strip 21 .

[0050] In a preferred embodiment, three rubber strips 21 between strands and three rubber strips 21 between strands and the wire core 1 are provided. The rubber strips 21 between strands and the wire strands are staggered and evenly distributed along a circumference. The material of the rubber strips 21 between strands is a rubber material with a certain elasticity, and the rubber strips 21 between strands are filled with high-pressure gas. When the pressure exerted on the inside of the cable by the protective layer 3 due to the bending deformation of the outer shielding layer 4 is transmitted to the central filling layer 2, the pressure is transmitted to the inside of the rubber strips 21 between strands through the fixed rubber strips 22 and the wire core 1, and the rubber strips 21 between strands compress the gas inside thereof, thereby deforming, so that the wire core 1 moves with the deformation of the rubber strips 21 between strands, thereby avoiding a large impact of the pressure on the wire core 1. The material of the fixed rubber strips 22 is a rubber strip, and the fixed rubber strips 22 are filled in the gaps between the rubber strips 21 between strands and the wire strands, the gaps between the wire strands and the protective layer 3, and the gaps between the rubber strips 21 between strands and the protective layer 3. During production, the fixed rubber strips 22, the rubber strips 21 between strands and the wire core 1 are subjected to the twisting process simultaneously.

[0051] In a preferred embodiment, four inter-strand rubber strips 21 and four wire cores 1 are provided. The inter-strand rubber strips 21 and wire strands are staggered and evenly distributed along a circumference. The material of the inter-strand rubber strips 21 is a rubber material with a certain elasticity, and the inter-strand rubber strips 21 are filled with high-pressure gas. When the pressure exerted on the inside of the cable by the protective layer 3 due to the bending deformation of the outer shielding layer 4 is transmitted to the central filling layer 2, the pressure is transmitted to the inside of the inter-strand rubber strips 21 through the fixed rubber strips 22 and the wire core 1, and the inter-strand rubber strips 21 compress the gas inside it, thereby deforming, so that the wire core 1 moves with the deformation of the inter-strand rubber strips 21, thereby avoiding a large impact of the pressure on the wire core 1. The material of the fixed rubber strips 22 is a rubber strip, and the fixed rubber strips 22 are filled in the gaps between the inter-strand rubber strips 21 and the wire strands, the gaps between the wire strands and the protective layer 3, and the gaps between the inter-strand rubber strips 21 and the protective layer 3. During production, the fixed rubber strips 22, the inter-strand rubber strips 21 and the wire core 1 are simultaneously subjected to the twisting process.

[0052] In a preferred embodiment, there are five rubber strips 21 between strands and five rubber strips 21 between strands and the core 1. The rubber strips 21 between strands are staggered and evenly distributed along a circle. The material of the rubber strips 21 between strands is a rubber material with a certain elasticity, and the rubber strips 21 between strands are filled with high-pressure gas. When the pressure exerted on the inside of the cable by the protective layer 3 due to the bending deformation of the outer shielding layer 4 is transmitted to the central filling layer 2, the pressure is transmitted to the inside of the rubber strips 21 between strands through the fixed rubber strips 22 and the core 1, and the rubber strips 21 between strands compress the gas inside it, thereby deforming, so that the core 1 moves with the deformation of the rubber strips 21 between strands, thereby avoiding a large impact of the pressure on the core 1. The material of the fixed rubber strips 22 is a rubber strip, and the fixed rubber strips 22 are filled in the gaps between the rubber strips 21 between strands and the strands, the gaps between the strands and the protective layer 3, and the gaps between the rubber strips 21 between strands and the protective layer 3. During production, the fixed rubber strips 22, the rubber strips 21 between strands and the core 1 are subjected to the twisting process simultaneously.

[0053] Reference Figure 6 In a possible implementation, a connecting rubber strip 23 is further included, which is arranged in the middle of the inter-thigh rubber strip 21, and the connecting rubber strip 23 is connected to the inter-thigh rubber strip 21. The connecting rubber strip 23 is made of the same material as the inter-thigh rubber strip 21, and the connecting rubber strip 23 is hollow inside and filled with high-pressure gas. The connecting rubber strip 23 can be deformed together with the inter-thigh rubber strip 21.

[0054] In a possible implementation, the outer shielding layer 4 is a copper tape shielding layer.

[0055] In a possible implementation, the core 1 is coated with an inner insulating layer 11 .

[0056] In a possible implementation, an inner shielding layer 12 is disposed outside the inner insulating layer 11 .

[0057] In a possible implementation, an outer insulating layer 5 coated on the outside of the outer shielding layer 4 is also included.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-interference control cable, characterized in that: include: Wire core (1); A central filling layer (2), filled around the wire core (1) and used to fix and protect the wire core (1); A protective layer (3) is coated on the outside of the wire core (1) and the central filling layer (2); the protective layer (3) includes an air bag (32), and the air bag (32) is deformed after being squeezed; and An outer shielding layer (4) is coated on the outside of the protective layer (3); The protective layer (3) is formed by a protective tape wrapped around the wire core (1) and the outside of the central filling layer (2); the protective tape comprises: Baseband (31); and A plurality of air bags (32) are fixed on the side of the base belt (31) close to the outer shielding layer (4); the plurality of air bags (32) are evenly distributed on the base belt (31); The width of the airbag (32) is the same as that of the base belt (31), and half of the airbag (32) is fixed on the base belt (31) so that the other half of the airbag (32) covers the gap between adjacent base belts (31).

2. The anti-interference control cable according to claim 1, characterized in that: The width of the airbag (32) is smaller than the width of the base belt (31), and a seal (33) is provided on one side of the airbag (32), and the seal (33) is used to seal the gaps between adjacent airbags (32) and the gaps between adjacent base belts (31).

3. The anti-interference control cable according to claim 1, characterized in that: The central filling layer (2) comprises: An interstrand rubber strip (21) is arranged between adjacent wire cores (1); the interstrand rubber strip (21) is hollow inside; and A fixing rubber strip (22) is filled between the wire core (1) and the inter-strand rubber strip (21) and is used to fix the wire core (1) and the inter-strand rubber strip (21).

4. The anti-interference control cable according to claim 3, characterized in that: It also includes a connecting rubber strip (23) arranged in the middle of the inter-thigh rubber strip (21), and the connecting rubber strip (23) is connected to the inter-thigh rubber strip (21).

5. The anti-interference control cable according to claim 1, characterized in that: The outer shielding layer (4) is a copper tape shielding layer.

6. The anti-interference control cable according to claim 1, characterized in that: The wire core (1) is externally coated with an inner insulating layer (11).

7. The anti-interference control cable according to claim 6, characterized in that: An inner shielding layer (12) is provided outside the inner insulating layer (11).

8. The anti-interference control cable according to claim 1, characterized in that: It also includes an outer insulating layer (5) covering the outer shielding layer (4).

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