Low-smoke halogen-free environment-friendly cable

Abstract

The utility model provides a low-smoke halogen-free environment-friendly cable, which relates to the technical field of cables and comprises a wire core, a conductor shielding layer fixedly connected to the surface of the wire core, an insulating layer fixedly connected to the surface of the conductor shielding layer, an insulating shielding layer fixedly connected to the surface of the insulating layer, and a metal shielding layer fixedly connected to the surface of the insulating shielding layer. According to the utility model, the reinforcing net formed by the reinforcing strips and the reinforcing rings is used for reinforcing the overall strength and protecting the whole body when the whole body is bent, meanwhile, the strength is improved, the influence of temperature change on the whole body is reduced, all parts are uniformly stressed through the net-shaped structure in the stress process of the whole body, and the damage to the whole body caused by stress concentration is avoided; and the annular groove is formed in the buffer layer, so that a certain deformation space is formed during overall bending and thermal expansion and cold contraction, the overall deformation performance is improved, and tearing is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially relates to a low smoke zero halogen environmental protection cable. BACKGROUND

[0002] Traditional cable often releases a large amount of dense smoke and corrosive gas after combustion due to containing halogen elements when fire occurs, which not only seriously hinders the line of sight of personnel escaping, making it difficult for people to identify direction and evacuate quickly in the smoke, but also causes great corrosion damage to surrounding electrical equipment and building structure, and the subsequent cleaning is quite difficult. In response to these challenges, scientific researchers have invested a lot of effort and used advanced material science and cable manufacturing technology to develop low smoke zero halogen environmental protection cable. It is based on halogen-free materials such as polyolefin, combined with high-efficiency flame retardants and special additives, which not only ensures the performance of power and signal transmission, but also realizes low smoke and low toxicity during combustion, and environmental protection and harmlessness in daily use, thereby building a solid cable foundation for the safety and sustainable development of many fields such as urban construction, public facilities and data centers.

[0003] However, in the prior art, due to the addition of a large amount of inorganic flame retardants, the strength of the polymer decreases, the elongation and flexibility decrease, and the inherent tear resistance and crack resistance are insufficient, resulting in limited mechanical strength of the cable, especially the bending resistance is not as good as that of conventional flexible cables. At the same time, halogen-free low-smoke materials are sensitive to temperature, and the internal stress generated by thermal expansion and cold contraction in an environment with large temperature changes can easily cause cracking in the interface area. SUMMARY

[0004] The utility model mainly provides a kind of low smoke zero halogen environmental protection cable with high strength and crack resistance.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a low smoke zero halogen environmental protection cable, comprising a core, the core surface is fixedly connected with a conductor shielding layer, the conductor shielding layer surface is fixedly connected with an insulation layer, the insulation layer surface is fixedly connected with an insulation shielding layer, the insulation shielding layer surface is fixedly connected with a metal shielding layer, the metal shielding layer surface is fixedly connected with a filling layer, the filling layer surface is fixedly connected with a buffer layer, the buffer layer surface is fixedly connected, the buffer layer is provided with a plurality of annular grooves, a plurality of annular grooves are evenly distributed in the inner wall of the buffer layer, and the buffer layer surface is fixedly connected with an outer protective layer.

[0006] Preferably, a plurality of reinforcing bars are fixedly connected between the insulation layer and the insulation shielding layer, and the plurality of reinforcing bars are evenly distributed on the surface of the insulation layer. The plurality of reinforcing bars improve the tensile strength and the anti-deformation performance during deformation of the whole.

[0007] Preferably, the reinforcing rings are arranged between the reinforcing strips, and the reinforcing strips are fixedly connected with each other through the reinforcing rings, and the reinforcing rings and the reinforcing strips are fixed through the reinforcing rings, so that the reinforcing rings and the reinforcing strips form a reinforcing net, the strength of the whole is strengthened, the whole is protected when being bent, meanwhile, the influence of temperature change on the whole is reduced through the strengthening, and the stress of each part of the whole is uniform in the stress process through the net structure.

[0008] Preferably, the reinforcing rings are fixedly connected with the insulating layer and the insulating shielding layer, and the reinforcing rings are fixed through the insulating layer and the insulating shielding layer, so that the connection of the whole is more stable.

[0009] Preferably, the depth of the annular groove is one fifth to one third of the thickness of the buffer layer, and the annular groove is arranged to have a certain deformation space when the whole is bent and expands or shrinks with heat, so that the deformation performance of the whole is improved, the depth of the annular groove is one fifth to one third of the thickness of the buffer layer, so that the strength of the buffer layer is not too low due to the too deep depth, and meanwhile, the deformation performance of the whole is not insufficient due to the insufficient depth.

[0010] Compared with the prior art, the utility model has the advantages and positive effects that,

[0011] 1、 the reinforcing net formed by the reinforcing strips and the reinforcing rings strengthens the strength of the whole, protects the whole when being bent, meanwhile, the influence of temperature change on the whole is reduced through the strengthening, the stress of each part of the whole is uniform in the stress process through the net structure, the damage of stress concentration to the whole is avoided, the annular groove is arranged in the buffer layer, and the annular groove has a certain deformation space when the whole is bent and expands or shrinks with heat, so that the deformation performance of the whole is improved, and the whole is prevented from being torn.

[0012] 2、 the conductor shielding layer made of the semi-conductive material uniformly distributes the electric field on the surface of the core, prevents the local electric field intensity from being too high to cause corona discharge, protects the core, meanwhile, provides a good adhesion interface for the insulating layer, provides an electrical insulation function, prevents current leakage, ensures safe transmission of electric energy, the insulating shielding layer and the conductor shielding layer have similar effects, balance the electric field on the surface of the insulating layer, prevent electric field distortion, further improve the electrical stability of the cable, meanwhile, the insulating layer is separated from the subsequent metal shielding layer, and direct contact between the two is avoided to cause short circuit.

[0013] 3、The utility model discloses a metal shielding layer shields external electromagnetic interference, prevents cable internal signal from being influenced by external electromagnetic field, can also limit electromagnetic energy produced when cable runs in cable interior, avoids electromagnetic pollution to outside, also plays the role of voltage equalization in some high voltage cables, through filling layer and buffer layer, the internal stress of cable in manufacturing, installation, use process because of bending, stretching, temperature change and other factors is absorbed and buffered, prevents internal stress from transmitting to internal key structure layer, causes damage, finally through the physical protection of outer sheath to each layer structure in the inside, resists the mechanical damage, chemical corrosion, ultraviolet radiation etc. of outside, ensures that cable normally operates under different environments. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 A low smoke halogen-free environmental protection cable is provided for the utility model;

[0015] Fig. 2 A low smoke halogen-free environmental protection cable is provided for the utility model;

[0016] Fig. 3 A low smoke halogen-free environmental protection cable is provided for the utility model.

[0017] Legend: 1, wire core; 2, conductor shielding layer; 3, insulation layer; 4, reinforcing strip; 5, insulation shielding layer; 6, metal shielding layer; 7, filling layer; 8, buffer layer; 9, outer sheath; 10, reinforcing ring; 11, annular groove. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further explained below in combination with the drawings and examples. It should be explained that the embodiment of the application and the features in the embodiment can be combined with each other without conflict.

[0019] In the following description, a lot of specific details are set forth in order to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from the description, therefore, the utility model is not limited to the specific embodiment disclosed in the following disclosure.

[0020] Please refer to Figs. 1-3The utility model provides a technical scheme: a low smoke halogen -free environmental protection cable, including the core 1, the core 1 surface fixed connection conductor shielding layer 2, the conductor shielding layer 2 surface fixed connection insulating layer 3, insulating layer 3 surface fixed connection insulating shielding layer 5, insulating shielding layer 5 surface fixed connection metal shielding layer 6, metal shielding layer 6 surface fixed connection filling layer 7, filling layer 7 surface fixed connection buffer layer 8, buffer layer 8 surface fixed connection, buffer layer 8 inside is provided with multiple annular grooves 11, multiple annular grooves 11 evenly distribute in buffer layer 8 inner wall, buffer layer 8 surface fixed connection outer sheath 9.

[0021] As Fig. 3 Shown, insulating layer 3 and insulating shielding layer 5 between fixed connection multiple reinforcing bars 4, multiple reinforcing bars 4 evenly distribute in insulating layer 3 surface, through multiple reinforcing bars 4 promote the tensile strength of whole and the anti-deformation performance when deformation.

[0022] As Fig. 3 Shown, multiple reinforcing bars 4 between setting reinforcing ring 10, reinforcing bar 4 between through reinforcing ring 10 mutually fixed connection, through reinforcing ring 10 and reinforcing bar 4 fixed, make reinforcing ring 10 and reinforcing bar 4 form reinforcing net, strengthen the strength of whole, protect when bending whole, reduce the influence of temperature change to whole simultaneously through strength, through mesh structure is the stress of whole in stress process, the stress of each part is even.

[0023] As Fig. 3 Shown, reinforcing ring 10 and insulating layer 3 fixed connection, and reinforcing ring 10 and insulating shielding layer 5 fixed connection, through insulating layer 3 and insulating shielding layer 5 fixed reinforcing ring 10, to make the connection of whole more stable.

[0024] As Fig. 3 Shown, the depth of annular groove 11 is one fifth to one third of the thickness of buffer layer 8, through the setting of annular groove 11 when bending and thermal expansion and contraction of whole, have certain deformation space, to promote the deformation performance of whole, through the depth of annular groove 11 is one fifth to one third of the thickness of buffer layer 8, avoid the strength of buffer layer 8 to be too low due to the depth being too deep, and at the same time avoid the deformation performance of whole to be insufficient due to the depth being insufficient.

[0025] The method for using the device and the working principle are as follows: the conductor shielding layer 2 made of a semi-conductive material uniformly shields the electric field distribution on the surface of the wire core 1, prevents the local electric field intensity from being too high to cause corona discharge, protects the wire core 1, simultaneously provides a good adhesion interface for the insulating layer 3, provides an electrical insulation function, prevents current leakage, ensures safe transmission of electric energy, the insulating shielding layer 5 and the conductor shielding layer 2 play similar roles, balance the electric field on the outer surface of the insulating layer 3, prevent electric field distortion, further improve the electrical stability of the cable, simultaneously separate the insulating layer 3 from the subsequent metal shielding layer 6 to avoid direct contact between the two to cause short circuit and other problems, the metal shielding layer 6 shields external electromagnetic interference, prevents the internal signals of the cable from being affected by external electromagnetic fields, simultaneously can limit the electromagnetic energy generated during the operation of the cable in the cable, avoids electromagnetic pollution to the outside, in some high-voltage cables, also plays a voltage balancing role, the filling layer 7 and the buffer layer 8 absorb and buffer the internal stress of the cable caused by factors such as bending, stretching and temperature change during the manufacturing, installation and use of the cable, prevent the internal stress from being transmitted to the internal key structure layer to cause damage, finally the outer protective layer 9 provides physical protection for the internal layers, resists mechanical damage, chemical corrosion, ultraviolet radiation and the like from the outside, and ensures normal operation of the cable in different environments.

[0026] The reinforcing net formed by the reinforcing strips 4 and the reinforcing rings 10 strengthens the overall strength, protects the whole body during bending, simultaneously improves the strength, reduces the influence of temperature change on the whole body, makes the stress of each part uniform during the stress process through the net structure, sets the annular groove 11 in the buffer layer 8, has a certain deformation space when the whole body is bent and expands and contracts with heat, and thus improves the deformation performance of the whole body.

[0027] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can change or modify the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made on the basis of the technical essence of the present application to the above embodiments still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A low-smoke, halogen-free, environmentally friendly cable, characterized in that: The device includes a wire core (1), a conductor shielding layer (2) fixedly connected to the surface of the wire core (1), an insulation layer (3) fixedly connected to the surface of the conductor shielding layer (2), an insulation shielding layer (5) fixedly connected to the surface of the insulation layer (3), a metal shielding layer (6) fixedly connected to the surface of the insulation shielding layer (5), a filling layer (7) fixedly connected to the surface of the metal shielding layer (6), a buffer layer (8) fixedly connected to the surface of the filling layer (7), and a buffer layer (8) fixedly connected to the surface of the buffer layer (8). The buffer layer (8) has multiple annular grooves (11) inside, which are evenly distributed on the inner wall of the buffer layer (8). The buffer layer (8) has an outer sheath (9) fixedly connected to the surface of the buffer layer (8).

2. The low-smoke halogen-free environmentally friendly cable according to claim 1, characterized in that: Multiple reinforcing strips (4) are fixedly connected between the insulating layer (3) and the insulating shielding layer (5), and the multiple reinforcing strips (4) are evenly distributed on the surface of the insulating layer (3).

3. The low-smoke halogen-free environmentally friendly cable according to claim 2, characterized in that: A reinforcing ring (10) is provided between multiple reinforcing strips (4), and the reinforcing strips (4) are fixedly connected to each other through the reinforcing ring (10).

4. The low-smoke halogen-free environmentally friendly cable according to claim 3, characterized in that: The reinforcing ring (10) is fixedly connected to the insulating layer (3), and the reinforcing ring (10) is fixedly connected to the insulating shielding layer (5).

5. The low-smoke halogen-free environmentally friendly cable according to claim 4, characterized in that: The depth of the annular groove (11) is one-fifth to one-third of the thickness of the buffer layer (8).

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