Impact-resistant low-smoke halogen-free fireproof cable

Abstract

The utility model discloses an impact-resistant low-smoke halogen-free fireproof cable, which comprises three groups of wire cores, the wire cores are mutually twisted, each wire core is composed of a copper core and a first insulating layer, a filling layer is arranged outside the first insulating layer, a first reinforcing rib is inserted into the filling layer at the center of the wire core, and a second reinforcing rib is inserted into the filling layer at the center of the wire core. The filling layer is wrapped by the second insulating layer, the shielding layer is arranged outside the second insulating layer, and the second reinforcing ribs are arranged outside the shielding layer, so that the problems that the cable is easy to break when being impacted and collided and the cable is difficult to isolate heat generated by flame are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to an impact-resistant low-smoke halogen-free fireproof cable. Background Art

[0002] Fire-resistant cables are special cables with fire-resistant properties designed to enhance safety in fire situations. Under specified test conditions, when a sample is burned, the spread of flames is limited to a defined range. Furthermore, after the test fire source is removed, any residual flames or burns self-extinguish within a specified timeframe. The structure and materials of fire-resistant cables typically include conductors, insulation layers, fire-resistant layers, and sheaths. Fire-resistant cables are widely used in construction, transportation, power generation, and other fields. Impact resistance is a key characteristic of fire-resistant cables.

[0003] For example, the Chinese patent "A Fire-Proof Cable" with announcement number CN208385060U includes an inner core, a filling rope, a tape layer, an inner sheath, a steel tape armor layer and an outer sheath arranged in sequence from the inside to the outside. The inner core includes an inner conductor, a polyester tape wrapped around the outer surface of the inner conductor, and a mica tape arranged between the inner conductor and the polyester tape. The filling rope is made of non-open mesh polypropylene tear material, the outer sheath is made of polyethylene, the inner sheath is made of polyethylene PE-90 material with polar liquid in the extrusion process, and the outer surface of the outer sheath is coated with reflective paint.

[0004] Although the above-mentioned existing technology can achieve fire prevention of cables, in actual use, on the one hand, the cables are prone to breakage when subjected to impact and collision. When external impact acts on the cable, the cable with a certain flexibility buffers part of the impact. If the impact exceeds the buffering range of the cable itself, the cable is prone to breakage, thereby shortening the service life of the cable. On the other hand, it is difficult for the cable to isolate the heat generated by the flame. When a fire occurs, the heat generated by the flame is transferred to the cable through thermal radiation, causing the temperature of the material inside the cable to rise, thereby affecting the stability of the cable. Therefore, it does not meet the existing needs. In this regard, we propose an impact-resistant low-smoke halogen-free fireproof cable. Utility Model Content

[0005] The purpose of the utility model is to provide an impact-resistant low-smoke halogen-free fireproof cable to solve the problems proposed in the above background technology that the cable is prone to breakage when subjected to impact or collision, and the cable is difficult to isolate the heat generated by the flame.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an impact-resistant low-smoke halogen-free fire-proof cable, comprising a core, three groups of cores are arranged, and the cores are twisted with each other, the core is composed of a copper core and a first insulating layer, a filling layer is arranged on the outside of the first insulating layer, the filling layer is located at the center of the core and is internally plugged with a first reinforcing rib, the outside of the filling layer is wrapped with a second insulating layer, the outside of the second insulating layer is provided with a shielding layer, and the outside of the shielding layer is provided with a second reinforcing rib.

[0007] Preferably, a buffer layer is provided on the outside of the second reinforcing rib, and the buffer layer is bonded to the second reinforcing rib by a polymer adhesive.

[0008] Preferably, a functional layer is provided on the outside of the buffer layer, an armor layer is provided on the inside of the functional layer located outside the second reinforcement rib, and the armor layer is wound and fixed on the outside of the second reinforcement rib by a wrapping device.

[0009] Preferably, a heat insulation layer is provided inside the functional layer located outside the armor layer, and the heat insulation layer is fixed to the outside of the armor layer by an extrusion device.

[0010] Preferably, a protective layer is provided on the outside of the functional layer, a flame retardant layer is provided on the inside of the protective layer located outside the thermal insulation layer, and the flame retardant layer is fixed to the outside of the thermal insulation layer by an extrusion device.

[0011] Preferably, a corrosion-resistant layer is provided inside the protective layer located outside the flame-retardant layer, and the corrosion-resistant layer is sprayed on the outside of the flame-retardant layer by spraying equipment.

[0012] Preferably, a wear-resistant layer is provided inside the protective layer located outside the flame-retardant layer, and the wear-resistant layer is fixed to the outside of the flame-retardant layer by an extrusion device.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model can improve the impact resistance of the cable through the first and second reinforcing ribs. As part of the cable structure, the first and second reinforcing ribs can enhance the mechanical strength of the cable. When the cable is subjected to external impact, the first and second reinforcing ribs can disperse and absorb part of the impact force, thereby reducing direct damage to the internal structure of the cable. In situations where the cable needs to be frequently bent or subjected to bending stress, the first and second reinforcing ribs can effectively support the structure of the cable and prevent the cable from being damaged due to excessive bending. If the impact force is too large, the cable is prone to deformation or even breakage. The first and second reinforcing ribs can resist such deformation and breakage tendencies to a certain extent through their rigidity and strength.

[0015] 2. The utility model improves the protective performance of the cable through the functional layer and the protective layer. The wear-resistant layer arranged on the outermost side of the protective layer can improve the wear resistance of the cable and avoid wear of other layers of the protective layer caused by friction of the cable. The corrosion-resistant layer arranged in the middle position of the protective layer can improve the corrosion resistance of the cable and avoid damage to the cable by external corrosive factors, thereby extending the service life of the cable. The flame-retardant layer arranged on the innermost side of the protective layer can improve the fire resistance of the cable. At the same time, the flame-retardant layer adopts low-smoke halogen-free material, so that the cable meets modern environmental protection requirements. The heat-insulating layer arranged on the outer side of the functional layer can insulate high temperature from being transferred to the cable core, thereby avoiding instability of the cable caused by high temperature. The armor layer arranged on the inner side of the functional layer can improve the impact resistance of the cable.

[0016] 3. The utility model is provided with a buffer layer, which can provide a certain buffer for the impact generated. When the impact is generated on the cable, the impact is transmitted to the inside of the cable through the functional layer and the protective layer. At this time, the impact causes extrusion on the buffer layer. When the buffer is squeezed, it is deformed. The deformation of the buffer layer absorbs a certain impact, thereby avoiding the impact directly acting on the second insulating layer and the shielding layer, thereby providing a certain protection for the cable core. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a cross-sectional view of the internal structure of the utility model;

[0019] Figure 3 This is a partial enlarged view of the internal structure of the functional layer of the utility model;

[0020] Figure 4 This is a partial enlarged view of the internal structure of the protective layer of the utility model;

[0021] Figure 5 For the utility model Figure 1 A partial enlarged view of area A in the middle.

[0022] In the figure: 1. Wire core; 2. First insulation layer; 3. First reinforcement rib; 4. Filling layer; 5. Second insulation layer; 6. Shielding layer; 7. Second reinforcement rib; 8. Buffer layer; 9. Functional layer; 901. Thermal insulation layer; 902. Armor layer; 10. Protective layer; 1001. Wear-resistant layer; 1002. Corrosion-resistant layer; 1003. Flame-retardant layer. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] See also Figure 1-5 The utility model provides an embodiment: an impact-resistant low-smoke halogen-free fire-proof cable, comprising a core 1, three groups of cores 1 are provided, and the cores 1 are twisted with each other, the core 1 is composed of a copper core and a first insulating layer 2, a filling layer 4 is provided on the outside of the first insulating layer 2, the filling layer 4 is located at the center of the core 1 and is internally plugged with a first reinforcing rib 3, a second insulating layer 5 is wrapped around the outside of the filling layer 4, a shielding layer 6 is provided on the outside of the second insulating layer 5, and a second reinforcing rib 7 is provided on the outside of the shielding layer 6.

[0025] The first insulating layer 2 and the second insulating layer 5 are both made of cross-linked polyethylene material. The first insulating layer 2 is fixed to the outside of the core 1 by an extrusion device, and the second insulating layer 5 is fixed to the outside of the filling layer 4 by an extrusion device. The shielding layer 6 adopts a copper wire braided structure, and the shielding layer 6 is sleeved and fixed to the outside of the second insulating layer 5. The filling layer 4 is filled with memory foam particles. The first reinforcing ribs 3 and the second reinforcing ribs 7 are both supported by a mixture of carbon fiber and resin materials. The second reinforcing ribs 7 are wound and fixed to the outside of the shielding layer 6 by a wrapping device.

[0026] See also Figure 1 and Figure 2 A buffer layer 8 is provided on the outside of the second reinforcement rib 7. The buffer layer 8 is bonded to the second reinforcement rib 7 by a polymer adhesive. Several protrusions are provided on the outside of the buffer layer 8. The buffer layer 8 is made of PE flame-retardant rubber material, which facilitates the buffer layer 8 to provide a certain buffer for the impact generated.

[0027] See also Figure 2 and Figure 3 A functional layer 9 is provided on the outside of the buffer layer 8, and an armor layer 902 is provided on the inside of the functional layer 9 located on the outside of the second reinforcement rib 7. The armor layer 902 is fixed to the outside of the second reinforcement rib 7 by a wrapping device. The armor layer 902 is woven with steel belts and steel wires, which facilitates improving the impact resistance of the cable through the armor layer 902.

[0028] See also Figure 2 and Figure 3 The functional layer 9 is located outside the armor layer 902 and is provided with an insulation layer 901. The insulation layer 901 is fixed to the outside of the armor layer 902 by an extrusion device. The insulation layer 901 adopts a soft polyurethane composite material, which makes it easy to isolate the heat generated by the flame from the outside of the cable core through the insulation layer 901.

[0029] See also Figure 1 、 Figure 2 and Figure 4A protective layer 10 is provided on the outside of the functional layer 9, and a flame retardant layer 1003 is provided on the inside of the protective layer 10 located on the outside of the thermal insulation layer 901. The flame retardant layer 1003 is fixed to the outside of the thermal insulation layer 901 through an extrusion device. The flame retardant layer 1003 is made of low-smoke halogen-free flame retardant polyolefin material, which makes it easy to prevent the cable from being ignited by flames through the flame retardant layer 1003.

[0030] See also Figure 1 and Figure 4 The protective layer 10 is located outside the flame retardant layer 1003 and is provided with a corrosion-resistant layer 1002. The corrosion-resistant layer 1002 is sprayed on the outside of the flame retardant layer 1003 by a spraying device. The corrosion-resistant layer 1002 adopts epoxy-phenolic paint, which facilitates improving the corrosion resistance of the cable through the corrosion-resistant layer 1002.

[0031] See also Figure 1 and Figure 4 The protective layer 10 is located outside the flame retardant layer 1003 and is provided with a wear-resistant layer 1001. The wear-resistant layer 1001 is fixed to the outside of the flame retardant layer 1003 by an extrusion device. The wear-resistant layer 1001 is made of nylon resin material, which facilitates improving the wear resistance of the cable through the wear-resistant layer 1001.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An impact-resistant low-smoke zero-halogen fireproof cable, comprising a wire core (1), wherein the wire core (1) is provided in three groups and the wire cores (1) are twisted together, characterized in that: The wire core (1) is composed of a copper core and a first insulating layer (2); a filling layer (4) is provided on the outside of the first insulating layer (2); a first reinforcing rib (3) is provided inside the filling layer (4) located at the center of the wire core (1); a second insulating layer (5) is provided on the outside of the filling layer (4); a shielding layer (6) is provided on the outside of the second insulating layer (5); and a second reinforcing rib (7) is provided on the outside of the shielding layer (6).

2. The impact-resistant low-smoke zero-halogen fire-resistant cable according to claim 1, characterized in that: A buffer layer (8) is sleeved on the outside of the second reinforcing rib (7), and the buffer layer (8) and the second reinforcing rib (7) are bonded together by a polymer adhesive.

3. The impact-resistant low-smoke zero-halogen fireproof cable according to claim 2, characterized in that: A functional layer (9) is provided on the outside of the buffer layer (8), an armor layer (902) is provided on the inside of the functional layer (9) located outside the second reinforcing rib (7), and the armor layer (902) is wound and fixed on the outside of the second reinforcing rib (7) by a wrapping device.

4. The impact-resistant low-smoke zero-halogen fireproof cable according to claim 3, characterized in that: The functional layer (9) is located outside the armor layer (902), and a heat insulation layer (901) is provided inside the functional layer (9), and the heat insulation layer (901) is fixed to the outside of the armor layer (902) by an extrusion device.

5. The impact-resistant low-smoke zero-halogen fire-resistant cable according to claim 4, characterized in that: A protective layer (10) is provided on the outside of the functional layer (9); a flame retardant layer (1003) is provided on the inside of the protective layer (10) located outside the thermal insulation layer (901); and the flame retardant layer (1003) is fixed on the outside of the thermal insulation layer (901) by an extrusion device.

6. The impact-resistant low-smoke zero-halogen fireproof cable according to claim 5, characterized in that: The protective layer (10) is located outside the flame retardant layer (1003) and is provided with a corrosion resistant layer (1002). The corrosion resistant layer (1002) is sprayed on the outside of the flame retardant layer (1003) by spraying equipment.

7. The impact-resistant low-smoke zero-halogen fire-resistant cable according to claim 6, characterized in that: The protective layer (10) is located outside the flame retardant layer (1003), and a wear-resistant layer (1001) is provided inside the protective layer (10) and is fixed to the outside of the flame retardant layer (1003) by an extrusion device.

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