Novel environment-friendly safety type multi-core fireproof cable

Abstract

The utility model discloses a novel environment-friendly safety type multi-core fireproof cable, which comprises three groups of wire cores, each wire core consists of a copper core and a first insulating layer, the wire cores are mutually twisted, a second insulating layer is sleeved outside each of the three groups of wire cores, a shielding layer is arranged outside each second insulating layer, and the shielding layers are arranged outside the copper cores and the first insulating layers. The outer portion of the shielding layer is sleeved with an inner protection sleeve, the outer portion of the inner protection sleeve is sleeved with an outer protection sleeve, and the structure solves the problems that a multi-core cable is prone to being ignited when encountering a fire, and a certain gap exists between cable cores of the multi-core cable.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a new type of environmentally friendly and safe multi-core fireproof cable. Background Technique

[0002] A multi-core cable is a cable with more than one insulated core. A multi-core cable mainly consists of a conductor, an insulating layer, a sheath, etc. Since a multi-core cable has multiple thin conductors, it can provide a larger surface area. The multiple conductors and flexible structure of a multi-core cable make it more flexible, and the flexibility of a multi-core cable also gives it a higher mechanical strength. Multi-core cables are widely used in fields such as aerospace, naval warships, and industrial automation. Among them, fireproofing is an important feature of multi-core cables.

[0003] For example, the Chinese patent "A Multi-Core Composite Cable" with the publication number CN216623814U includes an outer sheath and cable cores. There are multiple cable cores, and all the multiple cable cores are fixedly connected inside the outer sheath. Multiple notches are formed on the surface of the outer sheath, and anti-fold rubber strips are fixedly connected to the front and rear ends inside each notch. Each anti-fold rubber strip is in an X shape. Multiple retaining rings are evenly and fixedly connected to the surface of each cable core, and multiple through holes are formed on the front, rear, and middle surfaces of each retaining ring. The retaining rings on the surfaces of the multiple cable cores are mutually attached. Each retaining ring is in a U shape, and the left and right sides at the bottom of each retaining ring are in an arc transition setting.

[0004] Although the above-mentioned prior art can realize the use of multi-core cables, in actual use, on the one hand, multi-core cables are easily ignited when encountering a fire. When a fire occurs, the outer skin of the multi-core cables inside the fire site is easily ignited, resulting in the multi-core cables being burned out, thereby shortening the service life of the multi-core cables. On the other hand, there are certain gaps between the cores of the multi-core cables. When being squeezed, the cores are mutually squeezed, resulting in damage to the outer skin of the cores, thereby increasing the risk of cable damage. Therefore, it does not meet the existing requirements. For this reason, we propose a new type of environmentally friendly and safe multi-core fireproof cable. Content of the Utility Model

[0005] The purpose of the utility model is to provide a new type of environmentally friendly and safe multi-core fireproof cable to solve the problems that multi-core cables are easily ignited when encountering a fire and there are certain gaps between the cores of multi-core cables as mentioned in the above background technique.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A new type of environmentally friendly and safe multi-core fireproof cable, including wire cores, with three groups of wire cores provided. The wire cores are composed of wire cores and a first insulating layer, and the wire cores are twisted with each other. A second insulating layer is sleeved outside each of the three groups of wire cores. A shielding layer is provided outside the second insulating layer, and an inner protective sleeve is sleeved outside the shielding layer. An outer protective sleeve is sleeved outside the inner protective sleeve.

[0007] Preferably, a filling layer is provided between the shielding layer and the inner protective sleeve, and a reinforcing rib is provided inside the inner protective sleeve at the central position of the wire cores.

[0008] Preferably, a flame retardant layer is provided on the outermost side inside the inner protective sleeve, and a heat insulating layer is provided inside the inner protective sleeve on the inner side of the flame retardant layer. The flame retardant layer is fixed outside the heat insulating layer by an extrusion equipment.

[0009] Preferably, a metal protective sleeve is provided inside the inner protective sleeve on the inner side of the heat insulating layer, and the heat insulating layer is wound and fixed outside the metal protective sleeve by a wrapping equipment.

[0010] Preferably, a waterproof layer is provided inside the outer protective sleeve, and the waterproof layer is wound and fixed outside the flame retardant layer by a wrapping equipment.

[0011] Preferably, a fireproof layer is provided inside the outer protective sleeve on the outer side of the waterproof layer, and the fireproof layer and the waterproof layer are connected by a polymer adhesive.

[0012] Preferably, a wear-resistant layer is provided inside the outer protective sleeve on the outer side of the fireproof layer, and the wear-resistant layer is fixed outside the fireproof layer by an extrusion equipment.

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

[0014] 1. By providing an outer protective sleeve, the present utility model can provide protection for the cable. There are multiple hierarchical structures inside the outer protective sleeve, which improves the protection performance of the cable to a certain extent. The outermost wear-resistant layer can improve the wear resistance of the overall structure of the cable, reduce the damage of the remaining functional levels caused by external collisions, and thus extend the service life of the outer protective sleeve. The fireproof layer provided in the middle position can ensure that the cable is not ignited in a fire until the fire inside the fire site is extinguished. The waterproof layer provided in the innermost layer can effectively prevent moisture from seeping into the cable. The waterproof layer uses special waterproof materials, thereby protecting the conductors and insulating layers inside the cable from moisture erosion and improving the insulation performance and reliability of the cable.

[0015] 2. The utility model can reduce the gaps between cable cores through the filling layer and the reinforcing ribs. The filling material arranged inside the filling layer can effectively fix each group of wire cores inside the cable, making the arrangement of the wire cores of the cable more uniform, preventing the wire cores from moving or deforming when the cable is subjected to external forces, thereby enhancing the overall strength and stability of the cable. At the same time, the filling material can reduce the axial compression force between the wire cores. Meanwhile, the reinforcing ribs inserted at the middle position inside the filling layer further enhance the rigidity and strength of the cable, making the cable more stable when bearing external forces such as bending and stretching.

[0016] 3. The utility model is provided with an inner protective sleeve to protect the cable cores. The flame-retardant layer arranged on the outermost layer of the inner protective sleeve can maintain the integrity of the structure at high temperatures, preventing the cable from being damaged due to combustion. At the same time, the flame-retardant layer and the fireproof layer cooperate with each other to improve the overall fireproof performance of the cable. The heat-insulating layer arranged at the middle position of the inner protective sleeve can isolate the heat conducted by the cable. In case of a fire, the heat-insulating layer can effectively slow down the invasion of the fire on the cable, preventing the heat from being quickly conducted to the inside of the cable, thereby protecting the cable from being damaged. The metal protective sleeve arranged on the innermost layer of the inner protective sleeve has high mechanical strength and can effectively resist external pressures, tensile forces and other mechanical actions, protecting the conductors and insulating layers inside the cable from physical damage. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0019] Figure 3 is a partially enlarged view of the internal structure of the inner protective sleeve of the utility model;

[0020] Figure 4 is a partially enlarged view of the internal structure of the outer protective sleeve of the utility model;

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

[0022] In the figure: 1. Wire core; 2. First insulating layer; 3. Second insulating layer; 4. Shielding layer; 5. Filling layer; 6. Reinforcing rib; 7. Inner protective sleeve; 701. Flame-retardant layer; 702. Heat-insulating layer; 703. Metal protective sleeve; 8. Outer protective sleeve; 801. Wear-resistant layer; 802. Fireproof layer; 803. Waterproof layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

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

[0024] Please refer to Figures 1-5 , an embodiment provided by the present invention: a new type of environmentally friendly and safe multi-core fire-resistant cable, including a wire core 1. There are three groups of wire cores 1. The wire core 1 is composed of a copper core and a first insulating layer 2. The wire cores 1 are twisted together. A second insulating layer 3 is sleeved outside each of the three groups of wire cores 1. A shielding layer 4 is provided outside the second insulating layer 3. An inner protective sleeve 7 is sleeved outside the shielding layer 4. An outer protective sleeve 8 is sleeved outside the inner protective sleeve 7. Both the first insulating layer 2 and the second insulating layer 3 are made of polytetrafluoroethylene material. The shielding layer 4 is a braided copper mesh structure.

[0025] The outer protective sleeve 8 has multiple hierarchical structures inside, which improves the protection performance of the cable to a certain extent. The outermost wear-resistant layer 801 can improve the wear resistance of the overall structure of the cable, reduce the damage of the remaining functional levels caused by external collisions, and thus extend the service life of the outer protective sleeve 8. The fireproof layer 802 provided in the middle position can ensure that the cable is not ignited in a fire until the fire inside the fire scene is extinguished. The waterproof layer 803 provided in the innermost layer can effectively prevent moisture from seeping into the cable, thereby protecting the conductors and insulating layers inside the cable from moisture erosion.

[0026] Please refer to Figure 1 and Figure 2 , a filling layer 5 is provided between the shielding layer 4 and the inner protective sleeve 7. A reinforcing rib 6 is provided inside the inner protective sleeve 7 at the central position of the wire core 1. The reinforcing rib 6 is woven from multiple strands of aramid fiber bundles. The filling layer 5 is polyurethane foam, which is convenient to improve the compressive performance of the cable through the filling layer 5 and the reinforcing rib 6.

[0027] Please refer to Figure 2 and Figure 3 , a flame-retardant layer 701 is provided on the outermost side inside the inner protective sleeve 7. An insulating layer 702 is provided inside the inner protective sleeve 7 on the inner side of the flame-retardant layer 701. The flame-retardant layer 701 is fixed outside the insulating layer 702 through an extrusion device. The flame-retardant layer 701 is made of polyvinyl chloride. The insulating layer 702 is made of rock wool shredded and mixed with resin, which is convenient to prevent the cable from burning through the flame-retardant layer 701.

[0028] Please refer to Figure 2 and Figure 3, inside the inner protective sleeve 7 located inside the heat insulation layer 702, there is a metal protective sleeve 703. The heat insulation layer 702 is wound and fixed outside the metal protective sleeve 703 by a winding device. The metal protective sleeve 703 is made of aluminum metal, which is convenient to further improve the compressive performance of the cable through the metal protective sleeve 703.

[0029] Please refer to Figure 2 and Figure 4 , inside the outer protective sleeve 8, there is a waterproof layer 803. The waterproof layer 803 is wound and fixed outside the flame retardant layer 701 by a winding device. The waterproof layer 803 is made of a double-sided aluminum-plastic composite tape, with an aluminum metal layer in the middle and plastic layers on both sides, which is convenient to prevent moisture from entering the cable through the waterproof layer 803.

[0030] Please refer to Figure 2 and Figure 4 , inside the outer protective sleeve 8 located outside the waterproof layer 803, there is a fireproof layer 802. The fireproof layer 802 and the waterproof layer 803 are connected by a polymer adhesive. The fireproof layer 802 is made of basalt fiber fireproof cloth, which is convenient to prevent the cable from being ignited through the fireproof layer 802.

[0031] Please refer to Figure 2 and Figure 4 , inside the outer protective sleeve 8 located outside the fireproof layer 802, there is a wear-resistant layer 801. The wear-resistant layer 801 is fixed outside the fireproof layer 802 by an extrusion device. The wear-resistant layer 801 is made of PET material, which is convenient to improve the wear resistance of the outer protective sleeve 8 through the wear-resistant layer 801.

[0032] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A new type of environmentally friendly and safe multi-core fire-resistant cable, including a wire core (1), and there are three groups of wire cores (1), characterized in that: The said wire core (1) is composed of a copper core and a first insulating layer (2), the wire cores are twisted with each other, and a second insulating layer (3) is sleeved outside each of the three wire cores (1). A shielding layer (4) is arranged outside the second insulating layer (3), an inner protective sleeve (7) is sleeved outside the shielding layer (4), and an outer protective sleeve (8) is sleeved outside the inner protective sleeve (7).

2. A novel environmentally friendly and safe multi-core fire-resistant cable according to claim 1, characterized in that: A filling layer (5) is arranged between the shielding layer (4) and the inner protective sleeve (7), and a reinforcing rib (6) is arranged inside the inner protective sleeve (7) at the central position of the wire core (1).

3. The novel environmentally friendly and safe multi-core fireproof cable according to claim 2, wherein: A flame retardant layer (701) is arranged on the outermost side inside the inner protective sleeve (7), and a heat insulating layer (702) is arranged inside the inner protective sleeve (7) on the inner side of the flame retardant layer (701). The flame retardant layer (701) is fixed outside the heat insulating layer (702) through an extrusion device.

4. A novel environmentally friendly and safe multi-core fire-resistant cable according to claim 3, characterized in that: A metal protective sleeve (703) is arranged inside the inner protective sleeve (7) on the inner side of the heat insulating layer (702), and the heat insulating layer (702) is wound and fixed outside the metal protective sleeve (703) through a wrapping device.

5. A novel environmentally friendly and safe multi-core fireproof cable according to claim 4, characterized in that: A waterproof layer (803) is arranged inside the outer protective sleeve (8), and the waterproof layer (803) is wound and fixed outside the flame retardant layer (701) through a wrapping device.

6. A novel environmentally friendly and safe multi-core fireproof cable according to claim 5, characterized in that: A fireproof layer (802) is arranged inside the outer protective sleeve (8) on the outer side of the waterproof layer (803), and the fireproof layer (802) and the waterproof layer (803) are connected by a polymer adhesive.

7. A novel environmentally friendly and safe multi-core fireproof cable according to claim 6, characterized in that: A wear-resistant layer (801) is arranged inside the outer protective sleeve (8) on the outer side of the fireproof layer (802), and the wear-resistant layer (801) is fixed outside the fireproof layer (802) through an extrusion device.

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