Fireproof and flame-retardant subway control cable

Abstract

The utility model relates to a fireproof flame-retardant subway control cable, which comprises a plurality of conductors, insulating layers wrapped outside the conductors, inner shielding layers wrapped outside the insulating layers, first fireproof adhesive tape layers wrapped outside the inner shielding layers, and the same waterproof wrapping tape layer wrapped outside the first fireproof adhesive tape layers of the plurality of conductors. A gap between the waterproof wrapping tape layer and the first fireproof adhesive tape layer is filled with flame-retardant filler, the waterproof wrapping tape layer is wrapped by an outer shielding layer, the outer shielding layer is wrapped by an inner sheath, the inner sheath is wrapped by a first flame-retardant layer, the first flame-retardant layer is wrapped by a second flame-retardant layer, and the second flame-retardant layer is wrapped by an armor layer. The outer side of the armor layer is coated with an outer sheath, a plurality of steel wire ropes are evenly embedded in the inner circumference of the outer sheath, the outer side of the outer sheath is coated with a fireproof coating layer, and the outer side of the fireproof coating layer is coated with a second fireproof adhesive tape layer. The cable provided by the utility model is good in fireproof and flame-retardant effects and high in use safety.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a fireproof and flame-retardant control cable for subways. Background Art

[0002] At present, the subways in major cities in China are developing rapidly, and the control cables for subway vehicles supporting them have been widely produced. However, the current cables used in subways have the following deficiencies: Most of the current cables used in subways have poor flame retardancy and fire prevention effects. During use, there are relatively large potential safety hazards, resulting in the cables being prone to burning and breaking in high-temperature environments or during fires, thus causing subway failures, affecting the normal operation of the subway, bringing difficulties to the evacuation of personnel and the normal operation of other systems, and further causing unnecessary losses. Therefore, we propose a fireproof and flame-retardant control cable for subways. Summary of the Invention

[0003] The utility model aims to solve the deficiencies of the prior art and provides a fireproof and flame-retardant control cable for subways.

[0004] To achieve the above object, the utility model adopts the following technical solutions: A fireproof and flame-retardant control cable for subways, comprising a plurality of conductors, an insulating layer is coated on the outer side of the conductors, an inner shielding layer is coated on the outer side of the insulating layer, a first fireproof tape layer is coated on the outer side of the inner shielding layer, a same waterproof wrapping tape layer is coated on the outer sides of the first fireproof tape layers of the plurality of conductors, a flame-retardant filler is filled in the gap between the waterproof wrapping tape layer and the first fireproof tape layer, an outer shielding layer is coated on the outer side of the waterproof wrapping tape layer, an inner sheath is coated on the outer side of the outer shielding layer, a first flame-retardant layer is coated on the outer side of the inner sheath, a second flame-retardant layer is coated on the outer side of the first flame-retardant layer, an armor layer is coated on the outer side of the second flame-retardant layer, an outer sheath is coated on the outer side of the armor layer, a plurality of steel wires are evenly embedded in the circumferential direction inside the outer sheath, a fireproof coating layer is coated on the outer side of the outer sheath, and a second fireproof tape layer is coated on the outer side of the fireproof coating layer.

[0005] Specifically, the flame-retardant filler is flame-retardant polyurethane foam.

[0006] Specifically, the inner sheath is a nitrile rubber sheath.

[0007] Specifically, the first flame-retardant layer is a mineral wool layer.

[0008] Specifically, the second flame-retardant layer is a fiberglass braided layer.

[0009] Specifically, the outer sheath is a ceramized silicone rubber sheath.

[0010] The beneficial effects of the present utility model are as follows: By providing the first fireproof tape layer and the second fireproof tape layer, the present utility model can achieve the effects of fire prevention and flame retardance. At the same time, when the temperature around the cable rises, the fireproof tape can absorb heat and gradually expand to form a heat insulation layer, thereby reducing the conduction of heat into the cable interior and protecting the internal structure of the cable from damage. By providing the first flame retardant layer and the second flame retardant layer, a double-layer flame retardant layer is set to enhance the flame retardant effect of the cable. The outer sheath is a ceramized silicone rubber sheath, and ceramized silicone rubber has excellent fire prevention, flame retardance, low smoke, non-toxic and other characteristics. Under high-temperature conditions, this material can be transformed into a hard ceramized shell, and the hard shell will not melt or drip in a fire environment, making it suitable for application scenarios with extremely high fire prevention performance requirements. The cable of the present utility model has good fire prevention and flame retardance effects and high safety. Brief Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] In the figure: 1 - conductor; 2 - insulating layer; 3 - inner shielding layer; 4 - first fireproof tape layer; 5 - waterproof wrapping tape layer; 6 - outer shielding layer; 7 - inner sheath; 8 - first flame retardant layer; 9 - second flame retardant layer; 10 - armor layer; 11 - outer sheath; 12 - steel wire rope; 13 - fireproof coating layer; 14 - second fireproof tape layer; 15 - flame retardant filler;

[0013] The following will describe in detail with reference to the embodiments of the present utility model with reference to the drawings. Specific Embodiments

[0014] The following further illustrates the present utility model with reference to the drawings and embodiments:

[0015] As Figure 1 shown, a fireproof and flame-retardant control cable for subway includes a plurality of conductors 1. An insulating layer 2 is coated on the outer side of the conductor 1. An inner shielding layer 3 is coated on the outer side of the insulating layer 2. A first fireproof tape layer 4 is coated on the outer side of the inner shielding layer 3. The same waterproof wrapping tape layer 5 is coated on the outer sides of the first fireproof tape layers 4 of the plurality of conductors 1. The gap between the waterproof wrapping tape layer 5 and the first fireproof tape layer 4 is filled with a flame retardant filler 15. The flame retardant filler 15 is flame retardant polyurethane foam. An outer shielding layer 6 is coated on the outer side of the waterproof wrapping tape layer 5. An inner sheath 7 is coated on the outer side of the outer shielding layer 6. A first flame retardant layer 8 is coated on the outer side of the inner sheath 7. A second flame retardant layer 9 is coated on the outer side of the first flame retardant layer 8. An armor layer 10 is coated on the outer side of the second flame retardant layer 9. An outer sheath 11 is coated on the outer side of the armor layer 10. A plurality of steel wire ropes 12 are evenly embedded in the inner circumference of the outer sheath 11. The steel wire ropes 12 and the armor layer 10 can improve the tensile strength of the cable. A fireproof coating layer 13 is coated on the outer side of the outer sheath 11. A second fireproof tape layer 14 is coated on the outer side of the fireproof coating layer 13.

[0016] The provision of the first fireproof tape layer 4 and the second fireproof tape layer 14 can achieve the effect of fire prevention and flame retardance. At the same time, when the temperature around the cable rises, the fireproof tape can absorb heat and gradually expand to form a heat insulation layer, thereby reducing the conduction of heat into the cable interior and protecting the internal structure of the cable from damage; the fireproof tape has good chemical stability and can resist the erosion of various chemicals, ensuring the normal operation of the cable in a complex environment; the fireproof tape can also provide a certain degree of physical protection to prevent the cable from being damaged by external mechanical damage, such as abrasion and scratching.

[0017] The first flame retardant layer 8 is a mineral wool layer, and the second flame retardant layer 9 is a fiberglass braided layer. The double-layer flame retardant layer is provided to enhance the flame retardant effect of the cable. Mineral wool has good heat insulation performance and can effectively reduce the transfer of heat, protecting the internal structure of the cable from the influence of high temperature; mineral wool hardly produces smoke and does not release harmful gases at high temperature, which is environmentally friendly; fiberglass also has good flame retardant performance and can maintain structural stability at high temperature to prevent the spread of fire; fiberglass has high mechanical strength and can provide additional physical protection to reduce the possibility of the cable being damaged by external mechanical damage; fiberglass has good chemical stability and is not easily corroded, and can resist the erosion of various chemicals.

[0018] The inner sheath 7 is a nitrile rubber sheath. Nitrile rubber has good physical and mechanical properties, such as oil resistance, heat resistance, and flame resistance; the outer sheath 11 is a ceramized silicone rubber sheath. Ceramized silicone rubber has excellent fire prevention, flame retardance, low smoke, and non-toxic properties. Under high temperature conditions, this material can be transformed into a hard ceramized shell, and the hard shell will not melt or drip in a fire environment, making it suitable for application scenarios with extremely high fire protection requirements.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0020] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0021] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] The present utility model has been described above in an exemplary manner with reference to the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various improvements are made by adopting the method concept and technical solution of the present utility model, or directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A fireproof and flame-retardant control cable for subways, comprising a plurality of conductors (1), characterized in that, The outer side of the conductor (1) is coated with an insulating layer (2), the outer side of the insulating layer (2) is coated with an inner shielding layer (3), the outer side of the inner shielding layer (3) is coated with a first fireproof tape layer (4), the outer sides of the first fireproof tape layers (4) of a plurality of conductors (1) are coated with the same waterproof wrapping tape layer (5), the gap between the waterproof wrapping tape layer (5) and the first fireproof tape layer (4) is filled with a flame-retardant filler (15), the outer side of the waterproof wrapping tape layer (5) is coated with an outer shielding layer (6), the outer side of the outer shielding layer (6) is coated with an inner sheath (7), the outer side of the inner sheath (7) is coated with a first flame-retardant layer (8), the outer side of the first flame-retardant layer (8) is coated with a second flame-retardant layer (9), the outer side of the second flame-retardant layer (9) is coated with an armor layer (10), the outer side of the armor layer (10) is coated with an outer sheath (11), a plurality of steel wires (12) are evenly embedded in the inner circumference of the outer sheath (11), a fireproof coating layer (13) is coated on the outer side of the outer sheath (11), and the outer side of the fireproof coating layer (13) is coated with a second fireproof tape layer (14).

2. The fireproof and flame-retardant control cable for subway according to claim 1, wherein, The flame-retardant filler (15) is flame-retardant polyurethane foam.

3. A fire-resistant and flame-retardant control cable for subway according to claim 1, wherein, The inner sheath (7) is a nitrile rubber sheath.

4. A fireproof and flame-retardant control cable for subway according to claim 1, characterized in that, The first flame-retardant layer (8) is a mineral wool layer.

5. A fireproof and flame-retardant control cable for subways according to claim 1, characterized in that, The second flame-retardant layer (9) is a glass fiber braided layer.

6. A fireproof and flame-retardant control cable for subway according to claim 1, characterized in that, The outer sheath (11) is a ceramized silicone rubber sheath.

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