Low-heat-release B2-grade polyvinyl chloride insulated cable for building

Abstract

The utility model relates to the technical field of cables, and discloses a low-heat-release B2-grade polyvinyl chloride insulated cable for buildings, which comprises a plurality of conductors, insulating layers are fixedly connected outside the plurality of conductors, a same filling layer is fixedly connected outside the plurality of insulating layers, a wrapping tape is fixedly connected outside the filling layer, and the wrapping tape is fixedly connected outside the plurality of conductors. The outside of the wrapping tape is fixedly connected with an anti-puncture layer, the outside of the anti-puncture layer is fixedly connected with a buffer layer, and the outside of the buffer layer is fixedly connected with a sheath. According to the utility model, the conductors are isolated through the insulating layers to prevent current leakage and reduce heat release in case of fire, the filling layer fills gaps of the cable to enhance mechanical properties and heat dissipation, and the puncture-proof layer prevents the cable from being punctured, so that a stable and safe power transmission effect is realized, the safety risk in the power transmission process is reduced, and the fire hazard is reduced; the adaptive capacity of the cable in a complex environment is enhanced, and reliable operation of the cable in a building is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a low heat release B2 grade polyvinyl chloride insulated cable for building applications. Background Technology

[0002] As a carrier of power transmission and signal transmission, cables are widely used in energy supply, communication network construction, industrial production operations, and various building facilities from a macro perspective. In the construction field, cables are used to provide power support for lighting systems, electrical equipment, or security systems within buildings, and are an essential infrastructure to ensure the normal operation of buildings.

[0003] Currently, traditional PVC insulated cables in building wiring, by wrapping the conductor with an insulation layer, to some extent avoid the safety problems of short circuits or leakage caused by direct contact of current with the outside environment, ensuring the basic stability of power transmission. However, due to the limited fire resistance of the PVC material itself, when a fire occurs, the cable insulation layer and sheath will begin to burn. During the combustion process, the insulation layer and sheath of traditional PVC insulated cables will melt rapidly and continue to burn. On the one hand, this releases a large amount of heat, accelerating the spread of the fire and causing the fire to expand rapidly, bringing great difficulties to firefighting and rescue work. On the other hand, the combustion produces toxic gases such as hydrogen chloride. These gases are not only extremely harmful to human health, but inhalation during a fire can lead to poisoning or suffocation. They also cause serious corrosion to electrical equipment and other facilities in the building. Even if the fire is extinguished, subsequent repairs and equipment replacements will incur high costs. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a low heat release B2 grade polyvinyl chloride insulated cable for building applications. It aims to improve the problem in the prior art that the polyvinyl chloride material used in traditional polyvinyl chloride insulated cables has limited fire resistance. When encountering a fire, the insulation layer and sheath of the cable will burn, generating a large amount of heat and toxic gases.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A low-heat-release B2 grade polyvinyl chloride insulated cable for building applications includes multiple conductors, each conductor having an insulation layer fixedly connected to its exterior, each insulation layer having a common filling layer fixedly connected to its exterior, each filling layer having a wrapping tape fixedly connected to its exterior, the wrapping tape having a puncture-resistant layer fixedly connected to its exterior, the puncture-resistant layer having a buffer layer fixedly connected to its exterior, and the buffer layer having a sheath fixedly connected to its exterior.

[0007] As a further description of the above technical solution:

[0008] Each of the conductors is made of several copper wires of the same diameter twisted concentrically, and the twisting directions of adjacent strands are opposite.

[0009] As a further description of the above technical solution:

[0010] All of the aforementioned insulation layers and sheaths are made of low-heat-release B2 grade polyvinyl chloride through extrusion.

[0011] As a further description of the above technical solution:

[0012] The puncture-resistant layer is made of Kevlar.

[0013] As a further description of the above technical solution:

[0014] The buffer layer is made of silicone.

[0015] As a further description of the above technical solution:

[0016] The cross-sectional area of ​​the plurality of conductors is set to 0.5-240 mm². 2 .

[0017] As a further description of the above technical solution:

[0018] The sheath is internally fixedly connected with a tensile mesh, which is designed in a cross pattern.

[0019] As a further description of the above technical solution:

[0020] All of the conductors and filler layers are designed symmetrically.

[0021] This utility model has the following beneficial effects:

[0022] In this invention, electrical energy is transmitted through a conductor, an insulation layer isolates the conductor to prevent current leakage and reduces heat release during a fire, a filling layer fills the cable gaps, enhances mechanical properties and heat dissipation, a wrapping tape fixes the filling layer and provides mechanical protection, a puncture-resistant layer prevents the cable from being punctured, a buffer layer absorbs impact force, and a sheath resists external corrosion. This achieves a stable and safe power transmission effect, reduces safety risks during power transmission, reduces fire hazards, enhances the cable's adaptability in complex environments, and ensures the reliable operation of the cable in buildings. Attached Figure Description

[0023] Figure 1 This is a front view of a B2-grade low-heat-release polyvinyl chloride insulated cable for building applications according to this utility model.

[0024] Figure 2 This is a schematic diagram of the structure of a B2 grade polyvinyl chloride insulated cable for building applications according to this utility model.

[0025] Figure 3 This is a cross-sectional view of a B2-grade low-heat-release polyvinyl chloride insulated cable for building applications according to this utility model.

[0026] Figure 4 This is a cross-sectional view of the filling material in a B2-grade low-heat-release polyvinyl chloride insulated cable for building applications according to this utility model.

[0027] Figure 5 This is a schematic diagram of the tensile mesh structure in a B2-grade low-heat-release polyvinyl chloride insulated cable for building applications according to this utility model.

[0028] Legend:

[0029] 1. Conductor; 2. Insulation layer; 3. Filler layer; 4. Wrapping tape; 5. Puncture-resistant layer; 6. Buffer layer; 7. Sheath; 8. Tensile mesh. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model is provided: a low heat release B2 grade polyvinyl chloride insulated cable for building, comprising multiple conductors 1, each conductor 1 having an insulation layer 2 fixedly connected to its exterior, each insulation layer 2 having the same filling layer 3 fixedly connected to its exterior, the filling layer 3 having a wrapping tape 4 fixedly connected to its exterior, the wrapping tape 4 having a puncture-resistant layer 5 fixedly connected to its exterior, the puncture-resistant layer 5 having a buffer layer 6 fixedly connected to its exterior, and the buffer layer 6 having a sheath 7 fixedly connected to its exterior.

[0032] Specifically, multiple conductors 1 are the part of the cable that transmits electrical energy. Current flows in conductors 1, transmitting electrical energy from the power source to the equipment. Insulation layer 2 is fixedly connected to the outside of each conductor 1. Its main function is to isolate conductors 1 and prevent current leakage. Insulation layer 2 is made of low heat release B2 grade polyvinyl chloride extruded. This material not only has good insulation properties, but also reduces heat release and slows down the spread of fire in the event of a fire. Insulation layer 2 ensures electrical isolation between conductors 1 and between conductors 1 and the outside world, thus ensuring the safety of power transmission.

[0033] Multiple insulation layers 2 are fixedly connected to the same filler layer 3. The filler layer 3 fills the gaps inside the cable, making the cable structure more compact. It also enhances the overall mechanical properties of the cable, preventing displacement or damage to the conductor 1 and insulation layer 2 when the cable is bent or subjected to external forces. The filler layer 3 also helps improve the cable's heat dissipation performance, ensuring that the heat generated during operation can be dissipated in a timely manner. The wrapping tape 4 is wrapped around the filler layer 3, further securing it and providing some mechanical protection. The wrapping tape 4 prevents the filler layer 3 from loosening and also resists minor external friction and impacts, protecting the integrity of the internal structure. The puncture-resistant layer 5, made of Kevlar, is located outside the wrapping tape 4. Kevlar has high strength and high abrasion resistance, effectively preventing the cable from being punctured by sharp objects. In the event of puncture by a sharp object, the puncture-resistant layer 5 protects the internal conductor 1, insulation layer 2, filler layer 3, and wrapping tape 4 from damage during cable installation and use, ensuring normal cable operation. The buffer layer 6, fixedly connected to the outside of the puncture-resistant layer 5, is made of silicone. Silicone has good elasticity and cushioning properties, absorbing external impact forces. When the cable is squeezed or impacted, the buffer layer 6 reduces the impact force on the internal structure, protecting the cable from damage. The sheath 7 is the outermost layer of the cable, also made of low-heat-release B2 grade polyvinyl chloride extrusion. The sheath 7 not only provides mechanical protection for the cable but also resists external chemical corrosion, moisture intrusion, and ultraviolet radiation, extending the cable's service life and ensuring normal operation in various harsh environments, achieving stable and safe power transmission.

[0034] Reference Figure 3 , Figure 4 and Figure 5 Multiple conductors 1 are all made of a single copper wire or several copper wires of the same diameter concentrically stranded, and the stranding direction of adjacent strands is opposite; multiple insulation layers 2 and sheath 7 are all made of low heat release B2 grade polyvinyl chloride extruded; puncture-resistant layer 5 is made of Kevlar; buffer layer 6 is made of silicone; the cross-sectional area of ​​multiple conductors 1 is set to 0.5-240mm². 2 The sheath 7 has an internal fixed connection of tensile mesh 8, which adopts a cross design; the multiple conductors 1 and the filling layer 3 all adopt a symmetrical design.

[0035] Specifically, conductor 1 is made of a single copper wire or several copper wires of the same diameter concentrically stranded, with adjacent strands twisted in opposite directions. This effectively reduces electromagnetic interference and improves conductivity when conductor 1 transmits current. The cross-sectional area of ​​conductor 1 is set to 0.5-240 mm². 2The cable can be selected according to different power transmission requirements to ensure that it can carry the corresponding current load and stably transmit electrical energy from the power source to the equipment. Insulation layer 2 and sheath 7 are both made of low-heat-release B2 grade polyvinyl chloride extruded. Insulation layer 2 wraps around each conductor 1 to prevent current leakage and ensure electrical isolation between conductors 1 and between conductors 1 and the outside environment. In the event of a fire, this material reduces heat release, slows the spread of fire, and ensures the safety of power transmission. Sheath 7 provides all-round protection for the cable, resisting external chemical corrosion, moisture intrusion, and ultraviolet radiation, extending the cable's service life. Puncture-resistant layer 5 is made of Kevlar and located outside the wrapping tape 4. Kevlar's high strength and high abrasion resistance enable puncture-resistant layer 5 to effectively prevent the cable from being punctured by sharp objects during installation and use, protecting the internal conductors 1, insulation layer 2, filling layer 3, and wrapping tape 4 from damage. To ensure normal cable operation, the buffer layer 6, made of silicone, is fixed to the outside of the puncture-resistant layer 5. The elasticity and buffering properties of silicone allow it to absorb external impact forces. When the cable is squeezed or impacted, the buffer layer 6 can reduce the impact force on the internal structure and protect the cable from damage. The filler layer 3 fills the outside of multiple insulation layers 2, serving to fill the gaps inside the cable. The conductor 1 and the filler layer 3 adopt a symmetrical design, making the cable structure more compact and stable. The filler layer 3 enhances the overall mechanical properties of the cable, preventing the conductor 1 and insulation layer 2 from shifting or being damaged when the cable is bent or subjected to external forces. At the same time, it helps to improve the heat dissipation performance of the cable, ensuring that the heat generated during cable operation is dissipated in a timely manner. The tensile mesh 8, which is fixedly connected inside the sheath 7, adopts a cross design, enhancing the tensile strength of the cable. When the cable is subjected to tensile force, the tensile mesh 8 can disperse the tensile force and prevent the cable from being damaged due to uneven force.

[0036] Working Principle: Current flows in conductor 1, enabling the transmission of electrical energy from the power source to the device. Multiple conductors 1 can be made of a single copper wire or several copper wires of the same diameter concentrically stranded. This structural design can meet different power transmission requirements. Adjacent strands are twisted in opposite directions, increasing the density of conductor 1 and improving conductivity and mechanical strength. Insulation layer 2 is tightly fixed to the outside of each conductor 1, made of low-heat-release B2 grade polyvinyl chloride extruded. Its primary function is to isolate conductor 1, prevent current leakage, ensure electrical isolation between conductors 1 and between conductor 1 and the outside environment, and guarantee the safety of power transmission. In the event of a fire, this material reduces heat release, slows the spread of fire, and improves the fire resistance of the cable. Multiple insulation layers 2 are fixedly connected to the same filler layer 3. Filler layer 3 fills the internal gaps of the cable, making the cable structure more compact and enhancing the overall mechanical properties of the cable. This effectively prevents displacement or damage to conductor 1 and insulation layer 2 when the cable is bent or subjected to external forces. Simultaneously, filler layer 3 helps improve the heat dissipation performance of the cable, allowing the heat generated during cable operation to dissipate in a timely manner, ensuring... For stable cable operation, the wrapping tape 4, encased outside the filler layer 3, primarily serves to further secure the filler layer 3 and provide mechanical protection, preventing the filler layer 3 from loosening and resisting minor external friction and impacts, thus protecting the integrity of the cable's internal structure. The puncture-resistant layer 5, located outside the wrapping tape 4, is made of Kevlar material. Kevlar has high strength and high abrasion resistance, effectively preventing the cable from being punctured by sharp objects. During cable installation and use, the puncture-resistant layer 5 protects the internal conductor 1, insulation layer 2, filler layer 3, and wrapping tape 4 from damage, ensuring the cable's stable operation. In normal operation, the buffer layer 6 is fixedly connected to the outside of the puncture-resistant layer 5 and is made of silicone. Due to the good elasticity and buffering performance of silicone, it can absorb the impact force from the outside. When the cable is squeezed or impacted, the buffer layer 6 can reduce the impact force on the internal structure and protect the cable from damage. The sheath 7 is the outermost layer of the cable and is made of low heat release B2 grade polyvinyl chloride extrusion. It not only provides mechanical protection for the cable, but also resists external chemical corrosion, moisture intrusion and ultraviolet radiation, extending the service life of the cable and ensuring that the cable can work normally in various harsh environments.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-heat-release B2-grade polyvinyl chloride insulated cable for building applications, comprising a plurality of conductors (1), characterized in that: An insulating layer (2) is fixedly connected to the outside of each of the multiple conductors (1), and the same filling layer (3) is fixedly connected to the outside of each of the multiple insulating layers (2). A wrapping tape (4) is fixedly connected to the outside of the filling layer (3), a puncture-resistant layer (5) is fixedly connected to the outside of the wrapping tape (4), a buffer layer (6) is fixedly connected to the outside of the puncture-resistant layer (5), and a sheath (7) is fixedly connected to the outside of the buffer layer (6).

2. The low heat release B2 grade polyvinyl chloride insulated cable for building applications according to claim 1, characterized in that: The multiple conductors (1) are all made of several copper wires of the same diameter concentrically twisted together, and the twisting directions of adjacent strands are opposite.

3. The low heat release B2 grade polyvinyl chloride insulated cable for building applications according to claim 1, characterized in that: The multiple insulating layers (2) and sheaths (7) are all made of low heat release B2 grade polyvinyl chloride by extrusion.

4. The low heat release B2 grade polyvinyl chloride insulated cable for building applications according to claim 1, characterized in that: The puncture-resistant layer (5) is made of Kevlar.

5. A low-heat-release B2-grade polyvinyl chloride insulated cable for building applications according to claim 1, characterized in that: The buffer layer (6) is made of silicone.

6. A low-heat-release B2-grade polyvinyl chloride insulated cable for building applications according to claim 1, characterized in that: The cross-sectional area of ​​the plurality of conductors (1) is set to 0.5-240 mm². 2 .

7. A low-heat-release B2-grade polyvinyl chloride insulated cable for building applications according to claim 1, characterized in that: The sheath (7) is internally fixedly connected with a tensile mesh (8), which adopts a cross design.

8. A low-heat-release B2-grade polyvinyl chloride insulated cable for building applications according to claim 1, characterized in that: The conductors (1) and filling layers (3) are all designed symmetrically.

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