Environment-friendly control cable

Abstract

The utility model discloses an environmental protection type control cable relates to control cable technical field, including cable body, be equipped with buffer protection subassembly on the cable body, the cable body includes the sheath layer, the sheath layer inside is equipped with the protection layer, the protection layer inside is equipped with the filler layer, the filler layer inside is equipped with the shielding layer, the shielding layer inside is equipped with a plurality of electric core, a plurality of the electric core outside all are wrapped with insulating layer, buffer protection subassembly includes a plurality of protection strip, buffer strip and rubber protection sleeve, be equipped with a plurality of through -hole on the rubber protection sleeve, this patent passes through setting buffer protection subassembly, can avoid appearing the crack or the dent when environmental protection type control cable uses, can also avoid the electric core winding, the insulating layer wear and tear reduces the risk of insulation resistance drop after construction because of excessive bending, thereby prolongs the service life of environmental protection type control cable.

Description

Technical Field

[0001] This utility model relates to the field of control cable technology, specifically to an environmentally friendly control cable. Background Technology

[0002] As the core signal transmission carrier for industrial automation, building electrical systems, and new energy projects (such as photovoltaic power stations and energy storage systems), environmentally friendly control cables not only need to meet the requirements of halogen-free, low-smoke, low-toxicity, environmentally friendly, and recyclable throughout their entire life cycle, but also need to be adaptable to complex scenarios such as underground pipe corridors, dense pipelines in workshops, and outdoor open-air installations. In these scenarios, the construction space is often narrow (for example, the width of a single passage in an underground pipe corridor is often less than 1.5 meters), and construction personnel need to simultaneously perform cable pulling, pipeline fixing, and joint treatment. The frequency of use of handheld wrenches (typically weighing 1-3 kg), hammers (hammer head weighing 0.5-2 kg), electric drills, and other metal tools is extremely high, and the probability of tools slipping or accidentally touching cables is significantly higher than in open areas.

[0003] Chinese utility model patent publication number 202321222774.X discloses an environmentally friendly control cable. This patent features an insulation layer bonded to the outer ring of each cable core, an anti-interference layer filling the spaces between the cores, a reinforcing layer surrounding the anti-interference layer, and a fireproof layer surrounding the reinforcing layer. During use, the anti-corrosion layer allows the cable to remain uncorroded even when buried underground for extended periods, increasing its service life. The fireproof layer prevents damage from fire. The reinforcing layer improves the cable's ductility and tensile strength. The reinforcing layer can be quickly installed using a slot and clip. The conductive copper enhances the cable's conductivity. This device is simple in structure and easy to use, providing the cable with high corrosion resistance, conductivity, flexibility, and tensile strength, making it suitable for use in various regions and environments, thus improving the cable's practicality.

[0004] However, although the sheath of existing environmentally friendly control cables generally uses environmentally friendly materials such as halogen-free low-smoke polyolefins and cross-linked polyethylene (XLPE), their structure is mostly a single-layer sheath or a simple composite form of sheath plus simple flame-retardant tape. However, the thickness of a single-layer sheath is usually only 2-3mm, with a tensile strength of about 12-18MPa and an impact strength of 20-30kJ / m. 2The lack of a dedicated buffer and energy-absorbing structure is a significant problem. Even when some products incorporate the fire-resistant layers (such as mica tape) and reinforcing layers (such as aramid yarn braided layers) mentioned in the patent, the fire-resistant layers are rigid and have poor ductility, only able to withstand flame burning but unable to absorb instantaneous impacts. The reinforcing layers focus on tensile strength, offering negligible force dispersion for point- and line-type impacts. This structural defect directly leads to the impact energy being completely concentrated at the tool contact point: when the local pressure exceeds the sheath's tolerance limit, the sheath layer will instantly develop cracks ≥0.5mm deep or forming areas ≥1cm². 2 The dents and cracks in the sheath can compromise its sealing, allowing moisture, corrosive ions like Cl- / SO42- from the underground soil, or oil and dust from the workshop environment to seep into the interior and react with the insulation layer. Dents, on the other hand, cause the sheath to lose protection for the internal conductors. During subsequent cable pulling or pipeline crossing, the dented areas are easily damaged by other pipelines, further exposing the conductors. More seriously, this damage accelerates the cable's aging process: A normally undamaged environmentally friendly control cable can last 10-15 years underground, while a cable with cracks or dents will have its lifespan shortened to 3-5 years due to continuous damage to the internal insulation layer. This not only increases replacement costs but may also cause signal transmission interruptions due to insulation failure, and even lead to premature leaching of environmentally friendly materials due to sheath damage. Although these materials are environmentally friendly, the accelerated leaching rate can still have a slight impact on the surrounding soil, contradicting the core design principle of low environmental hazard throughout its entire life cycle. Utility Model Content

[0005] The purpose of this invention is to provide an environmentally friendly control cable to solve the problem that existing cables lack a dedicated shock-resistant buffer design, making them prone to cracks or dents after being subjected to impact.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly control cable, comprising a cable body, wherein the cable body is provided with a buffer protection component;

[0007] The cable body includes a sheath layer, a protective layer inside the sheath layer, a filling layer inside the protective layer, a shielding layer inside the filling layer, and multiple battery cores inside the shielding layer. Each of the multiple battery cores is wrapped with an insulation layer on its outer side.

[0008] The buffer protection assembly includes multiple protective strips, buffer strips, and a rubber protective sleeve, with multiple through holes on the rubber protective sleeve.

[0009] Furthermore, multiple protective strips are equidistantly installed on the outside of the sheath layer, the multiple protective strips are arc-shaped, and the multiple protective strips wrap around the outside of the sheath layer.

[0010] Furthermore, the plurality of buffer strips are configured as arcs, and the plurality of buffer strips are disposed between the sheath layer and the protective layer.

[0011] Furthermore, the plurality of buffer strips are equidistantly arranged, and the plurality of buffer strips wrap around the outside of the protective layer.

[0012] Furthermore, the multiple through holes are designed to be equidistant, and the size and number of the multiple through holes and the battery cells are all set accordingly.

[0013] Furthermore, the rubber protective sleeve is disposed inside the shielding layer, and the multiple battery cells are inserted into the corresponding through holes.

[0014] Compared with existing technologies, the environmentally friendly control cable provided by this utility model has the following advantages:

[0015] 1. By setting up buffer protection components, when using environmentally friendly control cables, if the cable needs to pass through wall holes, cross other pipelines, or is accidentally hit by tools (such as wrenches or hammers) by construction workers, the arc-shaped protective strip on the outside of the sheath layer will preferentially contact the external force. The arc structure disperses the impact force to other protective strips around it, keeping the local pressure of the sheath layer within 0.5MPa, avoiding cracks or dents. Compared with cables without protective components, the construction damage rate is reduced by more than 80%, reducing soil pollution caused by sheath damage. At the same time, when the cable needs to be bent around equipment, the buffer strip between the sheath layer and the protective layer will absorb bending stress through the reserved gap and deformation. Combined with the precise positioning of the battery core in the through hole of the rubber protective sleeve, it avoids the risk of battery core entanglement and insulation layer wear due to excessive bending, which reduces the insulation resistance after construction, thereby extending the service life of the environmentally friendly control cable.

[0016] 2. The modified chloroprene rubber, EVA foam rubber, and nitrile rubber used in the cable body all meet the requirements.

[0017] The RoHS 2.0 environmental standard allows for recycling and degradation through specialized processes after disposal; furthermore, by reducing cable damage and replacement frequency, it indirectly reduces energy consumption during production, achieving the dual goals of improved protective performance and enhanced environmental benefits. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the device provided in the embodiment of this utility model;

[0020] Figure 2 A schematic diagram of the buffer protection component structure provided in this embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the cable body provided in an embodiment of the present utility model;

[0022] Figure 4 A schematic diagram of the cross-sectional structure of the device provided in an embodiment of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Cable body; 2. Buffer and protection components; 11. Sheath layer; 12. Protective layer; 13. Filler layer; 14. Shielding layer; 15. Insulation layer; 16. Battery core; 21. Protective strip; 22. Buffer strip; 23. Rubber protective sleeve; 24. Through hole. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] As attached Figure 1 To be continued Figure 4 As shown:

[0027] Example 1:

[0028] This utility model provides an environmentally friendly control cable, including a cable body 1, a buffer protection component 2 on the cable body 1, and a sheath layer 11 (the sheath layer 11 is preferably made of halogen-free, low-smoke, flame-retardant cross-linked polyethylene XLPE material, which complies with GB / T19666-2019 "General Rules for Flame-Retardant and Fire-Resistant Wires and Cables" and the EU RoHS 2.0 environmental standard, does not contain heavy metals such as lead and cadmium, has a smoke density ≤50 when burning, and a toxic gas release ≤50mg / g, which can resist outdoor sun and rain, underground soil corrosion, and ensure personnel safety in fire scenarios). The inner side of the 11 is provided with a protective layer 12 (the protective layer 12 is preferably made of environmentally friendly polyester non-woven fabric tape with a thickness of 0.12-0.15mm, which wraps the filling layer 13 through a spiral winding process with a winding overlap rate of ≥25%, which can effectively bind the structure of the filling layer 13 and prevent the filling layer 13 from loosening due to external pressure. At the same time, the non-woven fabric can be 100% recycled and degraded, avoiding environmental pollution after disposal). The inner side of the protective layer 12 is provided with a filling layer 13 (the filling layer 13 is preferably made of flame-retardant glass fiber rope with a diameter of 1.5-2.0mm and a filling density of ≥90%, except for filling the gap between the battery cell 16 and the shielding layer 14). To ensure the roundness of the cable body 1 and to provide flame-retardant properties, which can delay the spread of flames, the sheath layer 11 forms a double flame-retardant protection. The inner side of the filling layer 13 is equipped with a shielding layer 14 (the shielding layer 14 preferably uses a copper wire braided and aluminum-plastic composite tape composite structure, with copper wire diameter 0.15mm, braiding density ≥85%, and aluminum-plastic composite tape thickness 0.08mm, which can simultaneously resist high-frequency interference generated by frequency converters, motors, and other equipment in industrial workshops, as well as low-frequency magnetic field interference generated by high-voltage lines). The inner side of the shielding layer 14 is equipped with multiple battery cores 16 (the battery cores 16 preferably use high-purity electrolytic copper (purity ≥99%)). 0.95%), the conductor structure is 7 strands twisted (single strand diameter 0.5mm), the twist pitch is 10-12mm, which improves the conductor flexibility (minimum bending radius is 6 times the cable outer diameter) and reduces current transmission loss (conductor DC resistance ≤13.7Ω / km at 20℃), and is suitable for control signals and power transmission of AC 0.6 / 1kV voltage level. Multiple cores 16 are wrapped with an insulation layer 15 (the insulation layer 15 preferably uses environmentally friendly polytetrafluoroethylene PTFE material, with a thickness of 0.2-0.3mm, a temperature resistance range of -60℃ to 260℃, and a volume resistivity ≥1×10⁻⁶). 16 Ω·cm, which can not only isolate the current interference of adjacent cells 16 and have a breakdown voltage ≥20kV / mm, but also adapt to harsh high and low temperature environments and prevent the insulation layer 15 from aging and cracking.

[0029] Working principle: Multiple battery cores 16 serve as the core conductive carriers, through which control signals or electrical energy from external devices are transmitted. The insulation layer 15 wrapped around the battery cores 16 effectively isolates current interference between adjacent battery cores 16, preventing leakage or signal crosstalk and ensuring transmission accuracy. The shielding layer 14 blocks external electromagnetic radiation from interfering with the signals transmitted within the battery cores 16, reducing signal attenuation. The filling layer 13 fills the gap between the battery cores 16 and the shielding layer 14, keeping the internal structure of the cable body 1 round and preventing transmission loss due to displacement of the battery cores 16 during laying or use. The protective layer 12 further enhances the stability of the internal structure of the cable, preventing the filling layer 13 and the shielding layer 14 from deformation due to external pressure. The outermost sheath layer 11 directly resists wear, corrosion, and high temperature effects from the external environment, extending the cable's service life.

[0030] Example 2:

[0031] This embodiment is basically the same as the previous embodiment, except that the buffer protection component 2 includes multiple protective strips 21 (the protective strips 21 are preferably made of modified neoprene rubber, with a Shore hardness of 60-70HA, a single cross-sectional size of 3mm×8mm, and an arc radius of 120°, equidistantly distributed along the outer side of the sheath layer 11, and fixed by a hot-pressing bonding process; a single protective strip 21 can withstand an instantaneous impact force of 100N without falling off, effectively resisting tool collisions and heavy object compression during construction, with a compression deformation of ≤30% and a recovery rate of ≥90% after unloading) and buffer strips 22 (the buffer strips 22 are preferably made of high-elasticity EVA foam rubber with a density of 0.3g / cm³). 3The single cross-sectional dimensions of the buffer strip 22 are 2mm × 6mm, with an arc radius of 90°. They are equidistantly arranged along the outer side of the protective layer 12, forming a reserved gap with the inner side of the sheath layer 11. This reserved gap provides sufficient buffer space when the buffer strip 22 is deformed under stress, preventing damage to the protective layer 12 due to excessive compression. A rubber protective sleeve 23 is also included (the rubber protective sleeve 23 is preferably made of nitrile rubber, with a Shore hardness of 50-60HA, a thickness of 0.8mm, and excellent oil resistance, suitable for use in oily environments such as machine tools and hydraulic equipment; the inner wall of the protective sleeve is polished to reduce the coefficient of friction between the battery cell 16 and the insulation layer 15). Multiple through holes 24 are provided on the rubber protective sleeve 23 (the inner diameter of each through hole 24 is 0.1–0.2mm larger than the outer diameter of the battery cell 16, and the hole walls are rounded to prevent the battery cell 16 from being inserted into the insulation layer 15). The insulation layer is scratched during connection; the number of through holes 24 corresponds exactly to the number of battery cells 16, and the center distance error of through holes 24 is ≤0.1mm to ensure accurate positioning of battery cells 16 and avoid uneven force caused by misalignment; multiple protective strips 21 are equidistantly installed on the outside of the sheath layer 11, multiple protective strips 21 are set in arc shape and wrap around the outside of the sheath layer 11; multiple buffer strips 22 are set in arc shape and are all set between the sheath layer 11 and the protective layer 12, multiple buffer strips 22 are set in arc shape and wrap around the outside of the protective layer 12; multiple through holes 24 are designed in arc shape, and the size and number of multiple through holes 24 correspond to the battery cells 16; rubber protective sleeves 23 are set inside the shielding layer 14, and multiple battery cells 16 are inserted into the through holes 24 respectively.

[0032] Working principle: Multiple outermost arc-shaped protective strips 21 are equidistantly wrapped around the outer side of the sheath layer 11. When the cable is subjected to external impact or friction, the protective strips 21 first come into contact with the external force and disperse the impact force through the arc structure, reducing the direct wear and extrusion deformation of the sheath layer 11.

[0033] The arc-shaped buffer strip 22 between the sheath layer 11 and the protective layer 12 can further absorb the remaining impact force through its own elastic deformation when the protective strip 21 has not completely offset the impact force, forming a double protection of the outer layer resisting and the middle layer buffering, and preventing the impact force from being transmitted to the internal filling layer 13, shielding layer 14 and battery cell 16.

[0034] The rubber protective sleeve 23 inside the shielding layer 14 has through holes 24 corresponding to the size and number of the battery cells 16. The battery cells 16 are inserted into the through holes 24, which can effectively limit the displacement of the battery cells 16 inside the cable and prevent the insulation layer 15 from being worn due to the battery cells 16 getting tangled together when the cable is bent or pulled. At the same time, the flexible material of the rubber protective sleeve 23 can form a wrap-around protection for the battery cells 16, reducing frictional damage between the battery cells 16 and the shielding layer 14.

[0035] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An environmentally friendly control cable, comprising a cable body (1), characterized in that, The cable body (1) is provided with a buffer protection component (2); The cable body (1) includes a sheath layer (11), a protective layer (12) is provided inside the sheath layer (11), a filling layer (13) is provided inside the protective layer (12), a shielding layer (14) is provided inside the filling layer (13), and multiple battery cores (16) are provided inside the shielding layer (14). The multiple battery cores (16) are all wrapped with an insulation layer (15) on the outside. The buffer protection component (2) includes multiple protective strips (21), buffer strips (22) and rubber protective sleeves (23), and the rubber protective sleeves (23) have multiple through holes (24).

2. The environmentally friendly control cable according to claim 1, characterized in that, Multiple protective strips (21) are installed at equal intervals on the outside of the sheath layer (11), the multiple protective strips (21) are set in an arc shape, and the multiple protective strips (21) wrap around the outside of the sheath layer (11).

3. The environmentally friendly control cable according to claim 1, characterized in that, The plurality of buffer strips (22) are configured in an arc shape, and the plurality of buffer strips (22) are disposed between the sheath layer (11) and the protective layer (12).

4. The environmentally friendly control cable according to claim 1, characterized in that, The multiple buffer strips (22) are equidistantly arranged, and the multiple buffer strips (22) are wrapped around the outside of the protective layer (12).

5. The environmentally friendly control cable according to claim 1, characterized in that, The multiple through holes (24) are designed at equal intervals, and the size and number of the multiple through holes (24) and the battery cell (16) are set accordingly.

6. The environmentally friendly control cable according to claim 1, characterized in that, The rubber protective sleeve (23) is disposed inside the shielding layer (14), and the multiple battery cells (16) are inserted into the corresponding through holes (24).

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