Low-smoke halogen-free cable sheath structure
By designing a low-smoke halogen-free cable sheath structure, including multi-layer protection and fluorescent layers, the problem of serious wear of the cable in harsh environments is solved, and the effect of extending service life and reducing maintenance difficulty is achieved.
Patent Information
- Application Number
- CN202420313945.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-20
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-02-20
AI Technical Summary
After the existing DC photovoltaic cable is used in harsh environments, the surface layer is worn seriously, resulting in the inner layer wear, which is difficult and costly, so the cable needs to be replaced as a whole.
A low-smoke halogen-free cable sheath structure is designed, including conductors, protective layers, flame retardant layers, isolation layers, galvanized steel wire armor layer, fluorescent layer and outer sheath. The wear of the sheath is judged by light deflection, reducing the difficulty of maintenance.
It extends the service life of the cable, reduces the difficulty and cost of maintenance, and improves the stability and heat resistance of the cable.
Smart Images
Figure CN222580788U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of halogen-free cables, in particular to a low-smoke halogen-free cable sheath structure. Background Art
[0002] As we all know, solar energy is a clean energy source. Human beings are still in the early stages of directly utilizing solar energy, mainly in the form of solar thermal collection, solar water heating systems, solar greenhouses, solar power generation, etc. In practical applications, solar energy systems are often in harsh environmental conditions. In addition to high temperatures and ultraviolet radiation, they are often subjected to mechanical loads. At this time, the cables must withstand pressure, bending, tension, cross-tension loads and strong impacts.
[0003] The current DC photovoltaic cables have very poor resistance to ultraviolet light. After a period of use, the surface of the cable is prone to wear. At this time, the staff can recycle the cable and replace the protective layer to achieve secondary use of the cable, which is conducive to reducing the cost of use. However, when the surface layer is completely damaged, the inner layer of the cable is prone to wear. At this time, in order to reduce the risk of use, the staff needs to replace the entire cable. At present, the staff needs to manually hold the cable and carefully check it before they can check the wear of the cable, which is difficult to operate. Utility Model Content
[0004] In order to solve the above problems, the utility model provides a low-smoke halogen-free cable sheath structure.
[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a low-smoke halogen-free cable sheath structure, comprising a conductor and a protective layer arranged on the side wall of the conductor, a flame retardant layer is arranged on the side wall of the protective layer, an isolation layer is arranged on the side wall of the flame retardant layer, a galvanized steel wire armor layer is arranged on the side wall of the isolation layer, a first outer sheath is arranged on the side wall of the galvanized steel wire armor layer, a fluorescent layer is arranged on the side wall of the first outer sheath, and a second outer sheath is arranged on the side wall of the fluorescent layer.
[0006] By adopting the above technical solution, when the staff connects the cable to the solar energy system, the second outer sheath is directly exposed to the air. As time goes by, the second outer sheath is prone to wear. During this process, the staff needs to inspect the cable. At this time, the staff only needs to make the light directly shine on the second outer sheath, so that the second outer sheath can block the light. When the second outer sheath is gradually worn, the thickness of the second outer sheath gradually decreases. At this time, part of the light is easy to pass through the second outer sheath and contact with the fluorescent layer, thereby causing the light to be deflected. At this time, the staff can judge the state of the second outer sheath by observing the state after the light contacts the second outer sheath, without touching the second outer sheath, thereby reducing the difficulty of the staff to inspect the second outer sheath.
[0007] Furthermore, the conductor includes four mutually twisted copper wires and an insulating layer arranged on the side walls of the copper wires.
[0008] Furthermore, a tin-plated layer is provided on the side wall of the copper wire.
[0009] By adopting the above technical solution, the probability of direct contact between the copper wire and the air is reduced, which is beneficial to slowing down the oxidation rate of the copper wire and further beneficial to extending the service life of the cable.
[0010] Furthermore, a semi-conductive conductor shielding layer is commonly installed on the side walls of the plurality of tin-plated layers.
[0011] Furthermore, the insulating layer is made of cross-linked polyethylene.
[0012] By adopting the above technical scheme, polyethylene (PE) cross-linking technology is one of the important means to improve its material properties. The cross-linked modified PE can greatly improve its performance, not only significantly improving the comprehensive properties of PE such as mechanical properties, environmental stress cracking resistance, chemical corrosion resistance, creep resistance and electrical properties, but also significantly improving the temperature resistance level, which can increase the heat resistance temperature of PE from 70°C to more than 100°C, thereby greatly broadening the application field of PE. The insulation layer made of cross-linked polyethylene has good heat resistance, which is conducive to improving the stability of the cable, and then helping to reduce the probability of cable damage.
[0013] Furthermore, the copper wire is made of oxygen-free copper.
[0014] By adopting the above technical solution, oxygen-free copper refers to pure copper that does not contain oxygen or any deoxidizer residue. But in fact, it still contains very trace amounts of oxygen and some impurities. According to the standard, the oxygen content is not more than 0.003%, the total impurity content is not more than 0.05%, and the purity of copper is greater than 99.95%. Copper wire made of oxygen-free copper has the characteristics of non-directionality, high purity, corrosion resistance, and extremely low electrical impedance, which is conducive to reducing the loss in cable transmission.
[0015] Furthermore, a non-woven fabric layer is provided between the galvanized steel wire armor layer and the isolation layer.
[0016] By adopting the above technical solution, non-woven fabrics, also known as non-woven fabrics, needle-punched cotton, needle-punched non-woven fabrics, etc., are made of polyester fiber, polyester fiber (abbreviated as: PET) and are made through a needle-punching process. They can be made into different thicknesses, feels, hardness, etc. Non-woven fabrics are moisture-proof, breathable, flexible, thin, flame-retardant, non-toxic and tasteless, low-priced, and recyclable. The non-woven fabric layer reduces the probability of the cable getting damp, thereby increasing the application range of the cable.
[0017] Furthermore, the second outer sheath is made of poly(fluoroethylene propylene).
[0018] In summary, the utility model has the following beneficial effects:
[0019] 1. In the present application, when the staff connects the cable to the solar energy system, the second outer sheath is directly exposed to the air. As time goes by, the second outer sheath is prone to wear. During this process, the staff needs to inspect and repair the cable. At this time, the staff only needs to direct the light to the second outer sheath so that the second outer sheath can block the light. When the second outer sheath is gradually worn, the thickness of the second outer sheath gradually decreases. At this time, part of the light is likely to pass through the second outer sheath and contact with the fluorescent layer, thereby causing the light to be deflected. At this time, the staff can judge the state of the second outer sheath by observing the state after the light contacts the second outer sheath, without touching the second outer sheath, thereby reducing the difficulty for the staff to inspect the second outer sheath;
[0020] 2. In this application, polyethylene (PE) cross-linking technology is one of the important means to improve its material properties. The performance of PE modified by cross-linking can be greatly improved, which not only significantly improves the comprehensive properties of PE such as mechanical properties, environmental stress cracking resistance, chemical corrosion resistance, creep resistance and electrical properties, but also significantly improves the temperature resistance level, which can increase the heat resistance temperature of PE from 70°C to above 100°C, thereby greatly broadening the application field of PE. The insulation layer made of cross-linked polyethylene has good heat resistance, which is beneficial to improve the stability of the cable, and then helps to reduce the probability of cable damage;
[0021] 3. In this application, oxygen-free copper refers to pure copper that does not contain oxygen or any deoxidizer residue. But in fact, it still contains very trace amounts of oxygen and some impurities. According to the standard, the oxygen content is not more than 0.003%, the total impurity content is not more than 0.05%, and the purity of copper is greater than 99.95%. Copper wire made of oxygen-free copper has the characteristics of non-directionality, high purity, corrosion resistance, and extremely low electrical impedance, which is conducive to reducing the loss in cable transmission. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;
[0023] Figure 2 This is a schematic diagram of the tin-plated layer and its connection structure in an embodiment of the utility model;
[0024] Figure 3 It is a schematic diagram of the copper wire and its connection structure in an embodiment of the utility model.
[0025] In the figure: 1. conductor; 11. copper wire; 12. insulation layer; 2. protective layer; 3. flame retardant layer; 4. isolation layer; 5. galvanized steel wire armor layer; 6. first outer sheath; 7. fluorescent layer; 8. second outer sheath; 81. tinned layer; 82. semi-conductive conductor shielding layer; 9. non-woven fabric layer. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.
[0027] like Figure 1-3 As shown, the embodiment of the present application discloses a low-smoke zero-halogen cable sheath structure, including a conductor 1, a protective layer 2, a flame retardant layer 3, an isolation layer 4, a galvanized steel wire armor layer 5, a first outer sheath 6, a fluorescent layer 7, a second outer sheath 8, a tinned layer 81, a semi-conductive conductor 1 shielding layer and a non-woven fabric layer 9. The protective layer 2 is arranged on the side wall of the conductor 1 to extend the service life of the conductor 1. The conductor 1 includes a copper wire 11 and an insulating layer 12. The copper wire 11 is provided with four strands and is twisted with each other, the insulating layer 12 is arranged on the side wall of the copper wire 11, and the tinned layer 81 is arranged on the side wall of the copper wire 11.
[0028] The tin-plated layer 81 reduces the probability of the copper wire 11 directly contacting the air, thereby helping to slow down the oxidation rate of the copper wire 11 and further helping to extend the service life of the cable.
[0029] The flame retardant layer 3 is arranged on the side wall of the protective layer 2 to reduce the probability of the cable catching fire. The isolation layer 4 is arranged on the side wall of the flame retardant layer 3, and the galvanized steel wire armor layer 5 is arranged on the side wall of the isolation layer 4 to improve the strength of the cable. The first outer sheath 6 is arranged on the side wall of the galvanized steel wire armor layer 5 to reduce the probability of damage to the conductor 1. The fluorescent layer 7 is arranged on the side wall of the first outer sheath 6, and the second outer sheath 8 is arranged on the side wall of the fluorescent layer 7.
[0030] The shielding layer of the semi-conductive conductor 1 is installed together on the side wall of multiple tin-plated layers 81, and the insulating layer 12 is made of cross-linked polyethylene. Polyethylene (PE) cross-linking technology is one of the important means to improve its material properties. The cross-linked modified PE can greatly improve its performance, not only significantly improving the comprehensive properties of PE such as mechanical properties, environmental stress cracking resistance, chemical corrosion resistance, creep resistance and electrical properties, but also significantly improving the temperature resistance level, which can increase the heat resistance temperature of PE from 70°C to above 100°C, thereby greatly broadening the application field of PE. The insulating layer 12 made of cross-linked polyethylene has good heat resistance, which is beneficial to improve the stability of the cable, and then to reduce the probability of cable damage.
[0031] In order to reduce the loss in cable transmission, the copper wire 11 is made of oxygen-free copper. Oxygen-free copper refers to pure copper that does not contain oxygen or any deoxidizer residue. But in fact, it still contains very trace amounts of oxygen and some impurities. According to the standard, the oxygen content is not more than 0.003%, the total impurity content is not more than 0.05%, and the purity of copper is greater than 99.95%. The copper wire 11 made of oxygen-free copper has the characteristics of non-directionality, high purity, corrosion resistance, and extremely low electrical impedance, which is conducive to reducing the loss in cable transmission.
[0032] The non-woven fabric layer 9 is made of non-woven fabric, and the non-woven fabric layer 9 is arranged between the galvanized steel wire armor layer 5 and the isolation layer 4. Non-woven fabric is also called non-woven fabric, needle-punched cotton, needle-punched non-woven fabric, etc. It is made of polyester fiber and polyester fiber (abbreviated as: PET) and is made through a needle-punching process. It can be made into different thicknesses, feels, hardness, etc. Non-woven fabric has the characteristics of moisture-proof, breathable, flexible, thin, flame-retardant, non-toxic and tasteless, low price, and recyclable. The non-woven fabric layer 9 reduces the probability of the cable getting damp, thereby increasing the application range of the cable.
[0033] In order to extend the service life of the cable, the second outer sheath 8 is made of poly(fluoroethylene propylene).
[0034] The use principle of a low-smoke halogen-free cable sheath structure in this embodiment is as follows: when the staff connects the cable to the solar energy system, the second outer sheath 8 is directly exposed to the air. As time goes by, the second outer sheath 8 is prone to wear. During this process, the staff needs to inspect and repair the cable. At this time, the staff only needs to make the light directly shine on the second outer sheath 8, so that the second outer sheath 8 can block the light. When the second outer sheath 8 is gradually worn, the thickness of the second outer sheath 8 gradually decreases. At this time, part of the light is easy to pass through the second outer sheath 8 and contact with the fluorescent layer 7, thereby causing the light to be deflected. At this time, the staff can judge the state of the second outer sheath 8 by observing the state after the light contacts the second outer sheath 8, without touching the second outer sheath 8, thereby reducing the difficulty of the staff to inspect the second outer sheath 8.
[0035] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. A low-smoke zero-halogen cable sheath structure, comprising a conductor (1) and a protective layer (2) arranged on the side wall of the conductor (1), characterized in that: A flame retardant layer (3) is arranged on the side wall of the protective layer (2), an isolation layer (4) is arranged on the side wall of the flame retardant layer (3), a galvanized steel wire armor layer (5) is arranged on the side wall of the isolation layer (4), a first outer sheath (6) is arranged on the side wall of the galvanized steel wire armor layer (5), a fluorescent layer (7) is arranged on the side wall of the first outer sheath (6), and a second outer sheath (8) is arranged on the side wall of the fluorescent layer (7).
2. The low-smoke zero-halogen cable sheath structure according to claim 1 is characterized by: The conductor (1) comprises four mutually twisted copper wires (11) and an insulating layer (12) arranged on the side walls of the copper wires (11).
3. The low-smoke zero-halogen cable sheath structure according to claim 2 is characterized by: A tin-plated layer (81) is provided on the side wall of the copper wire (11).
4. The low-smoke zero-halogen cable sheath structure according to claim 3 is characterized by: A semi-conductive conductor (1) shielding layer is commonly installed on the side walls of the plurality of tin-plated layers (81).
5. The low-smoke zero-halogen cable sheath structure according to claim 4 is characterized by: The insulating layer (12) is an insulating layer (12) made of cross-linked polyethylene.
6. The low-smoke zero-halogen cable sheath structure according to claim 5 is characterized by: The copper wire (11) is a copper wire (11) made of oxygen-free copper.
7. The low-smoke zero-halogen cable sheath structure according to claim 1 is characterized by: A non-woven fabric layer (9) is provided between the galvanized steel wire armor layer (5) and the isolation layer (4).
8. The low-smoke zero-halogen cable sheath structure according to claim 1 is characterized by: The second outer sheath (8) is a second outer sheath (8) made of poly(perfluoroethylene propylene).