Insulation fireproof cable for lamp strip

Abstract

The utility model relates to the technical field of wires and cables, in particular to an insulating fireproof cable for a lamp strip, which comprises a cable core and an outer sheath, and is characterized in that a flame-retardant filling strip comprises a first filling part located at the position of the cable core and second filling parts distributed on the peripheral side of the first filling part in a central symmetry manner; the cable is characterized in that a plurality of second filling parts are arranged in the cable core, a wire slot for accommodating the guide core is arranged between any two adjacent second filling parts, the guide core is positioned in the wire slot, so that the second filling parts are arranged between any two adjacent guide cores, and the flame-retardant filling strips are twisted in the guide cores of the cable, so that the guide cores have more deformation space in a bending state, and the flame-retardant filling strips are arranged in the guide cores. Therefore, compared with a compact twisting mode, the whole cable is easier to bend, and the composite wrapping tape composed of the fire-retardant wrapping tape and the fire-retardant filling strips is combined, so that the wrapping layer has the fire-retardant performance, a certain deformable compression space can be provided for the cable core, and the fireproof performance and the bending performance of the whole cable are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of wires and cables, in particular to an insulated fireproof cable for a light strip. Background Art

[0002] A light strip is a new type of lamp consisting of multiple LED lamp beads. These LED lamp beads are wrapped in flexible materials, allowing the light strip to be flexibly bent to adapt to the needs of various shapes and scenarios. Light strips are widely used in occasions that require lighting and decoration. The light strip cable, as a key component connecting the LED lamp beads and the power supply, also needs to be flexible to adapt to the needs of various shapes and scenarios.

[0003] For decorative purposes, light strips are generally installed in outdoor billboards, building facades, landscape lighting and other scenes. Therefore, the installation environment of the cable will be in a curved or unventilated situation. As the power of the light strip increases, the cable needs to use a multi-core cable with a large wire diameter (for example, three cores or more). The overall heat generation of the light strip and cable increases, and the overall mechanical hardness of the cable increases accordingly. For the narrow installation environment of the cable and the installation method with multiple bends, in order to make the cable adapt to the installation environment of the light strip, how to ensure the overall flexibility and fire resistance of the light strip cable has become an urgent problem to be solved. Utility Model Content

[0004] In view of the technical defects of the prior art, the purpose of the present invention is to provide an insulated fireproof cable for a light strip, comprising:

[0005] The cable core comprises a plurality of mutually twisted conductor cores and flame retardant filling strips filled around the conductor cores, wherein the conductor cores and the flame retardant filling strips are wrapped with a wrapping layer so that their cross-section forms a circle to form the cable core;

[0006] An outer sheath, extruded on the outside of the cable core;

[0007] Among them, the flame-retardant filling strip includes a first filling part at the cable core position and a second filling part distributed symmetrically around the first filling part. There is a wire groove for accommodating the guide core between any two adjacent second filling parts, and the guide core is in the wire groove, so that there is a second filling part between any two adjacent guide cores.

[0008] Preferably, the conductor core includes a conductor twisted in a 1+6+12 structure and an insulating layer wrapped around the outside of the conductor.

[0009] Preferably, three to four guide cores are provided, and the guide cores include power guide cores, signal guide cores and / or ground guide cores.

[0010] Preferably, the cross-sectional shape of the first filling portion is set to be a regular polygon, the second filling portion is set to be connected to the corners of the first filling portion, and the number of the second filling portions is equal to the number of the guide cores.

[0011] Preferably, the density of the first filling part is greater than the density of the second filling part.

[0012] Preferably, the wrapping layer includes a fire-retardant wrapping tape and a fire-retardant filling strip fixed on one side surface of the fire-retardant wrapping tape, the fire-retardant filling strip is parallel to the edge of the fire-retardant wrapping tape, and the fire-retardant wrapping tape and the fire-retardant filling strip are wrapped around the outside of the cable core, so that the cable core obtains movement space by squeezing the fire-retardant filling strip.

[0013] Preferably, the wrapping layer includes two fire-retardant wrapping tapes and a fire-retardant filling strip arranged between the two fire-retardant wrapping tapes. An adhesive layer is provided on the bonding surface of the two fire-retardant wrapping tapes, and the fire-retardant filling strip is bonded and fixed to the fire-retardant wrapping tapes through the adhesive layer.

[0014] Preferably, two fire-retardant filling strips are provided between the fire-retardant wrapping tapes, and the two fire-retardant filling strips are symmetrically distributed on the fire-retardant wrapping tapes and parallel to the edges of the fire-retardant wrapping tapes.

[0015] Preferably, the density of the fire-retardant filling strip is less than or equal to the density of the first filling portion, and the density of the fire-retardant filling strip is greater than the density of the first filling portion.

[0016] Preferably, the exterior of the outer sheath is provided with a fireproof coating.

[0017] Compared with the existing technology, the significant advantages of the insulated fireproof cable for light strips of the present invention are:

[0018] The insulated fireproof cable for light strips proposed by the utility model has flame-retardant filling strips twisted in the cable core, so that the core has more deformation space in a bent state. Therefore, compared with the compact twisting method, the cable as a whole is easier to bend. The composite wrapping tape composed of the fire-retardant wrapping tape and the fire-retardant filling strips not only makes the wrapping layer have fire-retardant properties, but also provides a certain deformable compression space for the cable core, thereby enhancing the overall flame-retardant and fire-proof properties and bending properties of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the hierarchical structure of the insulated fireproof cable for the light strip shown in the embodiment of the present utility model.

[0021] Figure 2 It is a schematic cross-sectional structure diagram of an insulated fireproof cable for a light strip shown in an embodiment of the present utility model.

[0022] Figure 3 It is a schematic diagram of the partial structure of the wrapping layer shown in an embodiment of the present utility model.

[0023] Figure 4 It is a schematic diagram of the wrapping structure of the wrapping layer shown in an embodiment of the present utility model.

[0024] The meanings of the various symbols in the accompanying drawings are as follows:

[0025] 10. Conductor core; 11. Conductor; 12. Insulation layer; 20. Flame-retardant filling strip; 21. First filling part; 22. Second filling part; 30. Wrapping layer; 31. Fire-retardant wrapping tape; 32. Fire-retardant filling strip; 33. Adhesive layer; 40. Outer sheath. DETAILED DESCRIPTION

[0026] In order to better understand the technical content of the present invention, specific embodiments are given and described below in conjunction with the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, the utility model provides an insulated fireproof cable for a light strip, aiming to improve the fire resistance and flexibility of the light strip to adapt to the installation environment of the light strip. The cable includes a cable core and an outer sheath 40 extruded around the outside of the cable core.

[0028] The cable core includes a plurality of mutually twisted conductor cores 10 and flame retardant filling strips 20 filled around the conductor cores 10. The conductor cores 10 and flame retardant filling strips 20 are wrapped with a wrapping layer 30 to form a circular cross section to form a cable core.

[0029] In some embodiments, the conductor core 10 includes a conductor 11 twisted in a 1+6+12 structure and an insulating layer 12 wrapped around the outside of the conductor 11. The conductor 11 is made of annealed fine copper wire to improve the flexibility and torsional resistance of the conductor 11. The outer insulating layer 12 is generally made of polyvinyl chloride (PVC) or cross-linked polyethylene (XLPE), which can provide good insulation.

[0030] Optionally, three to four conductor cores 10 are provided. Depending on the use requirements of the light strip, the conductor core 10 generally includes a power conductor core, a signal conductor core and / or a ground conductor core. When there are three conductor cores 10, two power conductor cores and one ground conductor core are generally selected. When the light strip needs to be connected to the control circuit, a control conductor core will be added.

[0031] Furthermore, the flame-retardant filling strip 20 includes a first filling portion 21 at the cable core position and a second filling portion 22 centrally and symmetrically distributed around the first filling portion 21. There is a wire groove for accommodating the guide core 10 between any two adjacent second filling portions 22, and the guide core 10 is in the wire groove, so that there is a second filling portion 22 between any two adjacent guide cores 10.

[0032] So, Figure 2 Taking the cable shown as an example, after the conductor cores 10 and the flame-retardant filling strips 20 are twisted into shape, the second filling portions 22 provide compression deformation space between adjacent conductor cores 10, and the first filling portions 21 provide compression deformation space at the center positions of the four conductor cores 10, so that the conductor cores 10 have more deformation space in a bent state, so that the cable as a whole is easier to bend compared to a compact twisting method.

[0033] Furthermore, the cross-sectional shape of the first filling portion 21 is set to be a regular polygon, the second filling portion 22 is set to be connected to the corners of the first filling portion 21, the number of the second filling portions 22 is equal to the number of the guide cores 10, and the density of the first filling portion 21 is greater than the density of the second filling portion 22.

[0034] In some embodiments, the flame retardant filling strip 20 is made of polyurethane flame retardant foam strip or polyethylene flame retardant foam strip. Flame retardant is added to this type of foam material. When combustion occurs, the flame retardant will undergo endothermic decomposition reactions such as dehydration and phase change, absorbing a large amount of heat released when the material burns, thereby reducing the temperature of the flame zone and the surface of the material, blocking the supply of combustible gas, and achieving the purpose of delaying the fire or extinguishing the flame.

[0035] like Figure 3 and Figure 4 As shown, in some embodiments, the wrapping layer 30 includes a fire-retardant wrapping tape 31 and a fire-retardant filling strip 32 fixed on one side surface of the fire-retardant wrapping tape 31, the fire-retardant filling strip 32 is parallel to the edge of the fire-retardant wrapping tape 31, and the fire-retardant wrapping tape 31 and the fire-retardant filling strip 32 are wrapped around the outside of the cable core, so that the cable core obtains movable space by squeezing the fire-retardant filling strip 32.

[0036] Among them, the fire-retardant wrapping tape 31 can be made of mica tape, and the fire-retardant filling strip 32 can be made of polyurethane flame-retardant foam strip or polyethylene flame-retardant foam strip. The layered structure of the mica tape effectively isolates the flame from high temperature, and its high thermal conductivity quickly conducts heat. The mica tape exhibits an absorption effect in the fire, reduces the oxygen supply, reduces the flame intensity, and continuously exerts the flame retardant effect through its structural stability.

[0037] In this way, the fire-retardant wrapping tape 31 is combined with the fire-retardant filling strip 32 and wrapped around the outer side of the guide core 10 and the flame-retardant filling strip 20, so that the wrapping layer 30 has fire-retardant properties while providing a certain deformable compression space for the cable core.

[0038] In other embodiments, the wrapping layer 30 includes two fire-blocking wrapping tapes 31 and a fire-blocking filling strip 32 arranged between the two fire-blocking wrapping tapes 31. An adhesive layer 33 is provided on the bonding surface of the two fire-blocking wrapping tapes 31. The fire-blocking filling strip 32 is bonded and fixed to the fire-blocking wrapping tape 31 through the adhesive layer 33. Two fire-blocking filling strips 32 are provided between the fire-blocking wrapping tapes 31. The two fire-blocking filling strips 32 are symmetrically distributed on the fire-blocking wrapping tapes 31 and parallel to the edge of the fire-blocking wrapping tapes 31. The density of the fire-blocking filling strip 32 is less than or equal to the density of the first filling portion 21, and the density of the fire-blocking filling strip 32 is greater than the density of the first filling portion 21.

[0039] In this way, when the fire-retardant wrapping tape 31 is wrapped around the outside of the guide core 10 and the flame-retardant filling strip 20, the two groups of fire-retardant filling strips 32 are partially limited to each other, which can ensure that the wrapping structure is stable and not easy to loosen. At the same time, when the cable is bent, the guide core 10 is partially squeezed toward the fire-retardant filling strip 32 and the flame-retardant filling strip 20, and a greater bending ability is obtained through the compression space caused by deformation.

[0040] Furthermore, the outer sheath 40 is coated with a fire-retardant coating made from a water-based tertiary propylene glycol emulsion with various flame retardants and plasticizers. When heated, the fire-retardant coating expands, forming a dense carbonized layer. This carbonized layer provides excellent thermal insulation, further blocking heat transfer and slowing the temperature rise within the cable. It also prevents flames from penetrating and spreading.

[0041] In combination with the above embodiments, by twisting the flame-retardant filling strips 20 in the cable core 10, the core 10 has more deformation space in the bent state. Therefore, compared with the compact twisting method, the cable as a whole is easier to bend. The composite wrapping tape composed of the fire-retardant wrapping tape 31 and the fire-retardant filling strips 32 is combined, so that the wrapping layer 30 has fire-retardant properties while providing a certain deformable compression space for the cable core, thereby enhancing the overall fire resistance and bending performance of the cable.

[0042] While the present invention has been described above with reference to preferred embodiments, this is not intended to limit the present invention. Persons skilled in the art will readily appreciate that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. An insulated fireproof cable for a light strip, characterized in that: include: A cable core comprising a plurality of mutually twisted conductor cores (10) and flame-retardant filling strips (20) filled around the conductor cores (10), wherein a wrapping layer (30) is wrapped around the outer sides of the conductor cores (10) and the flame-retardant filling strips (20) so that their cross-sections form a circle to form the cable core; An outer sheath (40) is extruded on the outside of the cable core; The flame-retardant filling strip (20) comprises a first filling portion (21) located at the cable core position and a second filling portion (22) centrally and symmetrically distributed around the first filling portion (21), wherein a wire groove for accommodating the guide core (10) is provided between any two adjacent second filling portions (22), and the guide core (10) is located in the wire groove, so that the second filling portion (22) is provided between any two adjacent guide cores (10).

2. The insulated fireproof cable for light strip according to claim 1, characterized in that: The conductor core (10) comprises a conductor (11) twisted in a 1+6+12 structure and an insulating layer (12) coated on the outside of the conductor (11).

3. The insulated fireproof cable for light strip according to claim 1, characterized in that: Three to four guide cores (10) are provided, and the guide cores (10) include a power guide core, a signal guide core, and / or a ground guide core.

4. The insulated fireproof cable for light strip according to claim 1, characterized in that: The cross-sectional shape of the first filling portion (21) is set to be a regular polygon, the second filling portion (22) is set to be connected to the corners of the first filling portion (21), and the number of the second filling portions (22) is equal to the number of the guide cores (10).

5. The insulated fireproof cable for light strip according to claim 1, characterized in that: The density of the first filling portion (21) is greater than the density of the second filling portion (22).

6. The insulated fireproof cable for light strip according to claim 1, characterized in that: The wrapping layer (30) includes a fire-retardant wrapping tape (31) and a fire-retardant filling strip (32) fixed on one side surface of the fire-retardant wrapping tape (31), wherein the fire-retardant filling strip (32) is parallel to the edge of the fire-retardant wrapping tape (31). The fire-retardant wrapping tape (31) and the fire-retardant filling strip (32) are wrapped around the outside of the cable core, so that the cable core obtains a movable space by squeezing the fire-retardant filling strip (32).

7. The insulated fireproof cable for light strip according to claim 1, characterized in that: The wrapping layer (30) includes two fire-retardant wrapping tapes (31) and a fire-retardant filling strip (32) arranged between the two fire-retardant wrapping tapes (31). An adhesive layer (33) is provided on the bonding surface of the two fire-retardant wrapping tapes (31). The fire-retardant filling strip (32) is bonded and fixed to the fire-retardant wrapping tapes (31) through the adhesive layer (33).

8. The insulated fireproof cable for light strip according to claim 7, characterized in that: Two fire-retardant filling strips (32) are provided between the fire-retardant wrapping tapes (31), and the two fire-retardant filling strips (32) are symmetrically distributed on the fire-retardant wrapping tapes (31) and are parallel to the edges of the fire-retardant wrapping tapes (31).

9. The insulated fireproof cable for light strip according to claim 8, characterized in that: The density of the fire-retardant filling strip (32) is less than or equal to the density of the first filling portion (21), and the density of the fire-retardant filling strip (32) is greater than the density of the first filling portion (21).

10. The insulated fireproof cable for light strip according to claim 1, characterized in that: The exterior of the outer sheath (40) is provided with a fireproof coating.

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