Flame-retardant fireproof compression-resistant railway signal cable

Abstract

The utility model relates to the technical field of cables, and provides a flame-retardant fireproof compression-resistant railway signal cable which comprises main wire cores. A polyester film wrapping layer, a halogen-free glass tape wrapping layer, an aluminum-plastic tape longitudinal wrapping layer, a polyethylene bonding lining, a compression-resistant galvanized double-steel-tape wrapping layer, a ceramic fire-resistant composite tape wrapping layer and a flame-retardant halogen-free low-smoke jacket layer are sequentially wrapped on the outer side of the main wire core from inside to outside.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a flame-retardant, fire-resistant and pressure-resistant railway signal cable. Background Art

[0002] Existing railway signal cables are generally only suitable for use in environmentally friendly locations, providing signal control for equipment. However, in outdoor environments, particularly mountainous terrain, where they are frequently subject to external forces such as falling rocks, high temperatures, and even fire, the flame retardancy, fire resistance, and compressive strength of conventional railway signal cables are significantly reduced, making them unable to meet the demands of signal and data transmission. Therefore, to ensure stable operation of railway signal cables in these challenging environments, improvements must be made to their structure to enable their application in a wider range of situations.

[0003] In summary, the urgent problem to be solved is to enable the use of railway signal cables in the above-mentioned special environment without changing the basic control and transmission performance of the previous railway signal cables. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a flame-retardant, fire-resistant and pressure-resistant railway signal cable. The flame-retardant and fire-resistant properties of the cable are enhanced through the rational use of fire-resistant mica tape, flame-retardant filling rope, halogen-free glass silk ribbon sheath, pressure-resistant galvanized double steel tape sheath, ceramic fire-resistant composite tape sheath, and flame-retardant halogen-free low-smoke outer layer. The structural design of the aluminum-plastic tape longitudinal wrap, flame-retardant polyethylene bonded lining, and pressure-resistant galvanized double steel tape sheath enhances the cable's pressure resistance, protecting the cable from damage in the event of external force or combustion, allowing it to maintain communication and power supply capabilities for a period of time. All components in the cable can meet the requirements of long-term use in special environments while maintaining the unique properties of the original railway signal cable. The product is suitable for use in mountainous areas, coastal areas, high-rise buildings, subways, power plants, railways, and other places.

[0006] (2) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A flame-retardant, fire-resistant and pressure-resistant railway signal cable, characterized in that it comprises a main core, the outer side of the main core is sequentially coated from the inside to the outside to form a polyester film wrapping layer, a halogen-free glass ribbon wrapping layer, an aluminum-plastic tape longitudinal wrapping layer and a polyethylene adhesive lining, a pressure-resistant galvanized double steel tape wrapping layer, a ceramic fire-resistant composite tape wrapping layer, and a flame-retardant, halogen-free and low-smoke outer jacket layer.

[0009] Preferably, the main wire core includes four star-shaped wire groups and flame-retardant filling ropes, which are twisted together. Each star-shaped wire group is composed of four insulated wire cores twisted together. The insulated wire core includes a conductor, and the outside of the conductor is coated with fire-resistant mica tape.

[0010] Preferably, the main line core is wrapped tightly with a layer of polyester film.

[0011] Preferably, a halogen-free glass ribbon wrapping layer is wrapped around the polyester film wrapping layer.

[0012] Preferably, the halogen-free glass ribbon is longitudinally wrapped around the outer surface of the sheath with a layer of aluminum-plastic composite tape, and at the same time, a flame-retardant polyethylene bonding lining layer is extruded.

[0013] Preferably, the flame-retardant polyethylene adhesive lining layer is wrapped with a compression-resistant galvanized double steel belt wrapping layer, and the steel belts are overlapped by gap wrapping, and the overlap rate is not less than 50%.

[0014] Preferably, a ceramic refractory composite belt wrapping layer is wrapped around the outside of the pressure-resistant galvanized double steel belt wrapping layer.

[0015] Preferably, a flame retardant, halogen-free, low-smoke outer layer is extruded around the outer surface of the ceramicized refractory composite tape.

[0016] Preferably, the thickness of the aluminum-plastic composite strip is 0.27 mm, and the strip is overlapped longitudinally, with the distance between the overlapped longitudinal strips being no less than 6 mm.

[0017] Preferably, the thickness of the pressure-resistant galvanized double steel strip is 0.2 mm.

[0018] (3) Beneficial effects

[0019] The present invention provides a flame-retardant, fire-resistant and pressure-resistant railway signal cable. It has the following beneficial effects:

[0020] The cable's flame retardancy and fire resistance are enhanced through the strategic use of fire-resistant mica tape, flame-retardant filler rope, halogen-free glass fiber ribbon wrap, compression-resistant galvanized double steel tape wrap, ceramic fire-resistant composite tape wrap, and a flame-retardant, halogen-free, low-smoke outer jacket. The cable's compressive strength is enhanced by the longitudinal aluminum-plastic tape wrap, flame-retardant polyethylene bonded liner, and compression-resistant galvanized double steel tape wrap. This protects the cable from internal damage even from external forces or combustion, ensuring it maintains communication and power supply capabilities for a period of time. All components in this cable are designed to withstand long-term use in extreme environments while maintaining the unique properties of traditional railway signal cables. This product is suitable for use in mountainous areas, coastal areas, high-rise buildings, subways, power plants, and railways. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic structural diagram of the utility model.

[0022] In the picture:

[0023] 1. Star line group;

[0024] 2. Flame retardant filling rope;

[0025] 3. Polyester film wrapping layer;

[0026] 4. Halogen-free glass ribbon wrapping;

[0027] 5. Aluminum-plastic longitudinal cladding;

[0028] 6. Polyethylene bonded lining;

[0029] 7. Compression-resistant galvanized double steel strip wrapping;

[0030] 8. Ceramic refractory composite tape wrapping layer;

[0031] 9. Flame retardant halogen-free low smoke outer layer;

[0032] 101. Conductor;

[0033] 102. Refractory mica tape;

[0034] 103. Polyethylene insulation;

[0035] 104. Cable tie. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0037] Refer to the attached Figure 1 A flame-retardant, fire-resistant and pressure-resistant railway signal cable includes a main core, the outer side of the main core is sequentially coated from the inside to the outside to form a polyester film wrapping layer 3, a halogen-free glass ribbon wrapping layer 4, an aluminum-plastic tape longitudinal wrapping layer 5 and a polyethylene bonding lining 6, a pressure-resistant galvanized double steel tape wrapping layer 7, a ceramic fire-resistant composite tape wrapping layer 8, and a flame-retardant, halogen-free and low-smoke outer jacket layer 9.

[0038] The main conductor core is wrapped tightly with a polyester film wrapping layer 3, which is then wrapped with a halogen-free glass ribbon wrapping layer 4. The halogen-free glass ribbon wrapping layer 4 is longitudinally overlapped with a layer of aluminum-plastic composite tape, and a polyethylene adhesive liner 6 is extruded. The polyethylene adhesive liner 6 is wrapped with a pressure-resistant galvanized double steel tape wrapping layer 7. The steel tape overlap is intermittently wrapped, with an overlap ratio of no less than 50%. The pressure-resistant galvanized double steel tape wrapping layer 7 is then wrapped with a ceramic fire-resistant composite tape wrapping layer 8. A flame-retardant, halogen-free, low-smoke outer jacket 9 is extruded over the ceramic fire-resistant composite tape wrapping layer 8.

[0039] The halogen-free glass ribbon wrapping layer 4 is wrapped in a longitudinal overlapping manner, with an overlapping rate of at least 15%.

[0040] The thickness of the aluminum-plastic composite tape is 0.27mm, and it adopts a longitudinal overlap method, and the distance between the longitudinal overlaps is not less than 6mm.

[0041] The thickness of the galvanized steel strip is 0.2mm, and the galvanized steel strip overlaps by gap wrapping, and the overlap rate is not less than 50%.

[0042] The ceramicized refractory composite tape wrapping layer 8 is wrapped in an overlapping manner, with an overlapping rate of at least not less than 15%.

[0043] The main line core includes four star-shaped wire groups 1 and flame-retardant filling ropes 2. The four star-shaped wire groups 1 and flame-retardant filling ropes 2 are twisted with each other. Each star-shaped wire group 1 is composed of four insulated cores twisted together. The insulated core includes a conductor 101. The conductor 101 is selected to be copper. The outside of the conductor 101 is coated with a fire-resistant mica tape 102. After the coating is completed, the outside of the conductor 101 is also extruded with high-density polyethylene insulation 103. The four insulated cores are twisted and tied tightly with a cable tie 104. The cable tie 104 is selected to be high-temperature resistant.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A flame-retardant, fire-resistant and pressure-resistant railway signal cable, characterized in that: The invention comprises a main core, the outer side of which is sequentially coated from the inside to the outside to form a polyester film wrapping layer (3), a halogen-free glass ribbon wrapping layer (4), an aluminum-plastic tape longitudinal wrapping layer (5), a polyethylene bonding lining (6), a pressure-resistant galvanized double steel tape wrapping layer (7), a ceramic fire-resistant composite tape wrapping layer (8), and a flame-retardant halogen-free low-smoke outer jacket layer (9).

2. The flame-retardant, fire-resistant and pressure-resistant railway signal cable according to claim 1, characterized in that: The main line core comprises four star-shaped wire groups (1) and a flame-retardant filling rope (2), the four star-shaped wire groups (1) and the flame-retardant filling rope (2) being twisted together, each star-shaped wire group (1) being composed of four twisted insulating wire cores, the insulating wire core comprising a conductor (101), and the conductor (101) being coated with a fire-resistant mica tape (102) on the outside.

3. The flame-retardant, fire-resistant and pressure-resistant railway signal cable according to claim 1 or 2, characterized in that: The main line core is wrapped with a polyester film wrapping layer (3) to be tightly wrapped.

4. The flame-retardant, fire-resistant and pressure-resistant railway signal cable according to claim 3, characterized in that: The polyester film wrapping layer (3) is further wrapped with a halogen-free glass ribbon wrapping layer (4).

5. The flame-retardant, fire-resistant and pressure-resistant railway signal cable according to claim 4, characterized in that: The halogen-free glass ribbon wrapping layer (4) is longitudinally covered with a layer of aluminum-plastic composite tape, and at the same time, a layer of flame-retardant polyethylene bonding lining (6) is extruded.

6. The flame-retardant, fire-resistant and pressure-resistant railway signal cable according to claim 5, characterized in that: The outer surface of the flame-retardant polyethylene bonding lining (6) is wrapped with a compression-resistant galvanized double steel belt wrapping layer (7), and the steel belts are overlapped by gap wrapping, and the overlap rate is not less than 50%.

7. The flame-retardant, fire-resistant and pressure-resistant railway signal cable according to claim 6, characterized in that: The pressure-resistant galvanized double steel strip wrapping layer (7) is wrapped with a ceramic fire-resistant composite strip wrapping layer (8).

8. The flame-retardant, fire-resistant and pressure-resistant railway signal cable according to claim 7, characterized in that: A flame-retardant, halogen-free, low-smoke outer layer (9) is extruded outside the ceramicized refractory composite tape wrapping layer (8).

9. The flame-retardant, fire-resistant and pressure-resistant railway signal cable according to claim 5, characterized in that: The thickness of the aluminum-plastic composite strip is 0.27 mm, and the strip is overlapped longitudinally, with the distance between the overlapped longitudinal strips being no less than 6 mm.

10. The flame-retardant, fire-resistant and pressure-resistant railway signal cable according to claim 6, characterized in that: The thickness of the compression-resistant galvanized double steel strip is 0.2 mm.

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