Fire-resistant partition firewall structure for cable tray

Abstract

The utility model relates to fire -resisting wall structure technical field especially relates to a fire -resisting wall structure of fire -resisting partition for cable bridge, the utility model provides such a fire -resisting partition for cable bridge's fire -resisting wall structure, including cable gene lock nanometer coating, bionic honeycomb buffer layer, memory alloy restraint net, fire -resisting package filling layer, fire -resisting partition skeleton layer, optical fiber nerve net, bionic scale protection layer, ceramic skeleton layer, self -repairing fire -resisting mud, space heat -insulating outer layer and cable conveying pipeline, from back to front, cable gene lock nanometer coating is the first layer of fire -resisting wall structure. The synergism of cable gene lock nanometer coating and fire -resisting package filling layer, ceramic skeleton layer and other multilayer structure constructs the composite fire -resisting barrier from nanometer level to macroscopic level, the high barrier property of graphene modified siloxane material, the high melting point of mullite ceramic and the characteristic of expansion type material expansion plugging when meeting fire can significantly improve the fire -resisting limit, effectively prevent the flame spread and heat conduction.

Description

Technical Field

[0001] This utility model relates to the field of fire-resistant wall structure technology, and in particular to a fire-resistant partition fire-resistant wall structure for cable trays. Background Technology

[0002] In modern power transmission and distribution systems, cable trays, as a crucial carrier for cable laying, are widely used in construction, energy, transportation, and other fields. With the continuous expansion of power systems and the increasing density of cable layouts, fire hazards are becoming increasingly prominent. Once a fire breaks out, it can easily spread rapidly along cable channels, causing serious consequences such as power outages, equipment damage, and even casualties. Therefore, fire-resistant cable tray walls, as core facilities for dividing fire compartments and preventing the spread of fire, directly affect the safe operation of the power system.

[0003] Currently, traditional fire-resistant walls for cable trays mostly use single fire-resistant materials or simple composite structures, which presents several technical bottlenecks. Firstly, their fire-resistant and heat-insulating performance is insufficient: conventional fire-resistant partition materials (such as ordinary fireproof boards and fireproof putty) are prone to deformation and cracking at high temperatures, making it difficult to form a durable and effective fire barrier. Furthermore, their heat conduction is significant, failing to meet long-term fire resistance requirements. Secondly, their structural adaptability is poor: the stress generated by thermal expansion and contraction during cable operation can easily lead to loosening of the fire-resistant wall structure and increased gaps, weakening its fire-resistant sealing. Thirdly, the fire resistance at cable joints is weak: the connection between the cable conduit and the fire-resistant wall typically uses only ordinary sealing materials, which are insufficient to effectively seal gaps during a fire, becoming pathways for the spread of flames and smoke.

[0004] Furthermore, with the increasing demands for power system reliability from emerging fields such as new energy and data centers, the limitations of traditional fire barriers in terms of mechanical protection, self-healing capabilities, and lightweight design are becoming increasingly apparent, making them unable to meet the fire safety requirements under complex operating conditions. Therefore, there is an urgent need to develop a new type of cable tray fire barrier structure that integrates efficient fire insulation, dynamic stress adaptation, and self-healing sealing functions to improve the overall safety and stability of the power system. Utility Model Content

[0005] In order to overcome the shortcomings mentioned in the background art, the technical problem of this utility model is to provide a fire-resistant partition fire-resistant wall structure for cable trays.

[0006] The technical solution of this utility model is: a fire-resistant partition fire-resistant wall structure for cable trays, comprising a cable gene-lock nano-coating, a biomimetic honeycomb buffer layer, a shape memory alloy constraint mesh, a fire-resistant filler layer, a fireproof partition skeleton layer, a fiber optic nerve network, a biomimetic scale protective layer, a ceramicized skeleton layer, a self-healing fireproof sealant, a space-grade heat insulation outer layer, and a cable conveying pipe. From back to front, the cable gene-lock nano-coating is the first layer of the fire-resistant wall structure, the biomimetic honeycomb buffer layer is tightly connected to the cable gene-lock nano-coating, and the shape memory alloy constraint mesh is laid on the biomimetic honeycomb... On the surface of the buffer layer, the fire-resistant bag filling layer is set on the shape memory alloy constraint mesh, and its interior is filled with intumescent fireproof material. The fireproof partition skeleton layer is made of high-strength fireproof coating board, which is firmly pressed together with the fire-resistant bag filling layer through a hot pressing process. The fiber optic nerve network is laid on the surface of the fireproof partition skeleton layer. The biomimetic scale protective layer is directly connected to the fiber optic nerve network. The ceramicized skeleton layer is firmly connected to the biomimetic scale protective layer through an adhesive. The space-insulated outer layer serves as the terminal protective layer of the fire-resistant wall structure, and is seamlessly bonded to the ceramicized skeleton layer through self-healing fireproof putty.

[0007] Preferably, the thickness of the cable gene lock nano-coating is controlled at 0.08-0.12 mm.

[0008] Preferably, the biomimetic honeycomb buffer layer uses polyimide foam material.

[0009] Preferably, the shape memory alloy constraint mesh is woven from nickel-titanium shape memory alloy wires through a warp and weft interlacing.

[0010] Preferably, the cable conveying duct comprises, from the outside to the inside, a metal armored protective outer layer, an intumescent flame-retardant core layer, a fire-resistant sealing composite layer, and a nano-ceramic inner coating layer. The metal armored protective outer layer forms a mechanical protective shell through a spiral winding process. The intumescent flame-retardant core layer fills the inside of the metal armored protective outer layer. The fire-resistant sealing composite layer is firmly bonded to the intumescent flame-retardant core layer with an adhesive. The nano-ceramic inner coating layer is the innermost layer and is connected to the fire-resistant sealing composite layer.

[0011] Preferably, the fireproof sealing composite layer contains multiple layers of expanded graphite and silicone rubber composite material.

[0012] Preferably, the intumescent fireproof material in the fire-retardant pack filling layer is a composite particle of aluminum hydroxide and melamine cyanurate, with the particle diameter controlled at 0.5-2mm, and the particles are bonded together by sodium silicate solution.

[0013] As a preferred option, the high-strength fireproof coating board of the fireproof partition skeleton layer has a thickness of 3-5mm, and its surface is distributed with honeycomb-shaped through holes with a diameter of 2-3mm, and the through holes are filled with glass fiber cotton.

[0014] As a preferred option, the ceramicized skeleton layer uses lightweight mullite ceramic plates.

[0015] As a preferred option, self-healing fireproof putty uses smart gel materials.

[0016] The present invention has the following advantages: 1. The cable gene lock nano-coating, fire-retardant filler layer, ceramic skeleton layer and other multi-layer structures work together to build a composite fire barrier from the nano level to the macro level. The high barrier properties of graphene modified siloxane material, the high melting point of mullite ceramic, and the expansion and sealing properties of intumescent material when exposed to fire can significantly improve the fire resistance limit and effectively prevent the spread of flame and heat conduction.

[0017] 2. The biomimetic honeycomb buffer layer simulates the mechanical structure of a honeycomb, which can efficiently absorb the stress generated by the thermal expansion and contraction of the cable; the shape memory alloy constraint mesh, with its superelasticity and shape memory effect, adaptively adjusts the tension, maintains the stability of each structural layer, avoids structural damage caused by stress concentration, and ensures the long-term reliable operation of the firewall.

[0018] 3. The multi-layer fireproof sealing structure of the cable conveying pipeline (expansion-type fire-retardant core layer and fireproof sealing composite layer), combined with self-healing fireproof putty, can prevent moisture and foreign objects from entering under normal working conditions, quickly seal gaps in the event of a fire, and automatically repair itself after damage, ensuring fireproof integrity. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the planar structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the planar structure of each layer of the fire-resistant wall structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the planar structure of each layer of the cable conveying pipeline of this utility model.

[0022] In the attached diagrams: 1: Cable gene lock nano-coating, 2: Bionic honeycomb buffer layer, 3: Shape memory alloy constraint mesh, 4: Fire-retardant pack filling layer, 5: Fireproof partition skeleton layer, 6: Fiber optic nerve network, 7: Bionic scale protective layer, 8: Ceramic skeleton layer, 9: Self-healing fireproof putty, 10: Space insulation outer layer, 11: Metal armor protective outer layer, 12: Intumescent fire-retardant core layer, 13: Fireproof sealing composite layer, 14: Nano-ceramic inner coating. Detailed Implementation

[0023] Example: A fire-resistant partition fire-resistant wall structure for cable trays, such as... Figures 1-3As shown, the structure includes a cable gene-lock nano-coating 1, a biomimetic honeycomb buffer layer 2, a shape memory alloy constraint mesh 3, a fire-resistant filler layer 4, a fireproof partition skeleton layer 5, a fiber optic neural network 6, a biomimetic scale protective layer 7, a ceramicized skeleton layer 8, a self-healing fireproof sealant 9, a space-grade thermal insulation outer layer 10, and a cable transport pipe. From back to front, the cable gene-lock nano-coating 1, as the first layer of the fire barrier structure, is prepared using graphene-modified siloxane nanocomposite material based on chemical vapor deposition (CVD) technology. The coating thickness is controlled at 0.08-0.12 mm. This coating, leveraging the excellent thermal barrier properties of graphene and the chemical stability of siloxane, forms a nanoscale dense fire barrier, effectively inhibiting heat conduction and flame spread. The biomimetic honeycomb buffer layer 2 is tightly integrated with the cable gene-lock nano-coating 1. The biomimetic honeycomb buffer layer 2 is made of polyimide foam material, which simulates the hexagonal mechanical structure of a honeycomb through biomimetic principles. This structure can not only efficiently absorb the thermal expansion and contraction stress caused by temperature changes in the cable, but also construct an air insulation cavity to achieve passive heat insulation by utilizing the low thermal conductivity of air. The shape memory alloy constraint mesh 3 is laid on the surface of the biomimetic honeycomb buffer layer 2. It is woven from nickel-titanium shape memory alloy wires. Its unique superelasticity and shape memory effect can adaptively adjust the tension when the temperature changes, providing dynamic constraint support for subsequent structural layers. The fire-retardant filling layer 4 is set on the shape memory alloy constraint mesh 3. Its interior is filled with an intumescent fireproof material, which is a composite particle of aluminum hydroxide and melamine cyanurate, with the particle diameter controlled at 0.The fireproof partition skeleton layer 5 is made of high-strength fireproof coated board with a thickness of 3-5mm. Its surface has honeycomb-shaped through-holes with a diameter of 2-3mm, filled with glass fiber cotton. It is firmly pressed together with the fire-resistant filling layer 4 through a hot-pressing process to form a composite load-bearing structure, providing stable mechanical support and a fire barrier. The fiber optic neural network 6 is laid on the surface of the fireproof partition skeleton layer 5. Based on distributed fiber optic sensing technology, it integrates quantum dot temperature sensors and fiber optic strain sensors, enabling real-time monitoring of cable temperature field distribution and internal wall strain. By constructing a three-dimensional thermal field finite element model and combining it with quantum tunneling effect theory, it achieves ultra-early warning of fire precursors. The biomimetic scale protective layer 7 is made of… The fire barrier is composed of titanium alloy sheets and a shape memory polymer coating, directly connected to the fiber optic neural network 6. The titanium alloy sheets provide mechanical protection, while the shape memory polymer coating triggers shape recovery at high temperatures, filling gaps and preventing flame penetration. The ceramicized skeleton layer 8 uses lightweight mullite ceramic plates, firmly connected to the biomimetic scale protective layer 7 via a high-temperature resistant adhesive. The high melting point and low thermal conductivity of mullite ceramics significantly improve the fire resistance limit of the fire barrier. The space-age thermal insulation outer layer 10 serves as the terminal protective layer of the fire barrier structure, seamlessly bonded to the ceramicized skeleton layer 8 via self-healing fireproof putty 9. The self-healing fireproof putty 9 uses a smart gel material that rapidly solidifies upon contact with fire and automatically fills gaps after damage via internal microcapsule repair agents. Multiple cable delivery pipes are symmetrically spaced throughout the upper side of the fire barrier structure.

[0024] like Figures 1-3 As shown, the cable conveying pipeline, from the outside to the inside, includes a metal armored protective outer layer 11, an intumescent flame-retardant core layer 12, a fire-resistant sealing composite layer 13, and a nano-ceramic inner coating layer 14. The metal armored protective outer layer 11 is made of high-strength alloy steel and is formed into a mechanical protective shell through a spiral winding process. The intumescent flame-retardant core layer 12 is filled inside the metal armored protective outer layer 11 and can expand to 10-15 times its original volume when heated. The fire-resistant sealing composite layer 13 is firmly bonded to the intumescent flame-retardant core layer 12 with a high-temperature resistant adhesive. The fire-resistant sealing composite layer 13 contains multiple layers of expanded graphite and silicone rubber composite materials. The nano-ceramic inner coating layer 14 is the innermost layer, connected to the fire-resistant sealing composite layer 13, and is made of alumina-based nano-ceramic material. A smooth surface is formed through a plasma spraying process, which directly contacts the cable outer sheath, providing wear resistance, insulation, and fire protection.

[0025] This device is mainly installed at the fire-resistant zone boundaries of cable trays, where cables pass through building walls or floors, and in areas with dense cables. It inserts the cable into the cable transport duct, completing the cable connection. At the gap between the duct and the cable, the intumescent fire-retardant core layer 12 and the fire-resistant sealing composite layer 13 naturally adhere to the cable, forming a seal. During normal operation, the cable gene-locking nano-coating 1, with its high barrier properties of graphene-modified siloxane material, slows the transfer of external heat into the fire-resistant wall. The biomimetic honeycomb buffer layer 2, through the honeycomb structure of polyimide foam, absorbs the thermal expansion and contraction stress caused by changes in current load on the cable. The air insulation cavity further reduces heat conduction. The fiber optic neural network 6 monitors the cable temperature and internal wall strain in real time, transmitting the data to the monitoring system to construct a three-dimensional thermal field model and continuously assess the cable's operating status. The metal armored protective outer layer 11 of the cable transport duct resists external mechanical impacts, the nano-ceramic inner coating 14 protects the cable, and the fire-resistant sealing composite layer 13 and the intumescent fire-retardant core layer 12 maintain the internal seal of the duct, preventing the intrusion of external moisture and foreign objects. During the fire outbreak, when an abnormal increase in local temperature is detected, the fiber optic neural network 6 quickly identifies the quantum tunneling effect of fire precursors through quantum sensing technology and immediately issues an early warning to the monitoring system. When the temperature continues to rise to the trigger threshold (≥200℃) of the intumescent fire-resistant core layer 12, it rapidly expands 10-15 times, filling the gaps between pipes and cables to form a dense carbonized heat insulation layer, preventing flames and smoke from spreading through the pipes. The fire-resistant bag filling layer 4 expands synchronously, working together with the fireproof partition skeleton layer 5 and the ceramicized skeleton layer 8 to construct a multi-layer fire barrier, blocking the spread of fire. The shape memory polymer coating of the biomimetic scale protective layer 7 recovers its shape at high temperatures, filling gaps; the self-healing fireproof putty 9 rapidly solidifies at high temperatures, automatically repairing damaged parts and ensuring the overall sealing of the fire barrier. Throughout the process, all components work together to control the fire in a localized area, buying time for personnel evacuation and fire rescue, while minimizing damage to cables and power facilities.

Claims

1. A fire-resistant partition fire-resistant wall structure for cable trays, characterized in that: The structure includes a cable gene-lock nano-coating (1), a biomimetic honeycomb buffer layer (2), a shape memory alloy constraint mesh (3), a fire-resistant filler layer (4), a fireproof partition skeleton layer (5), a fiber optic nerve network (6), a biomimetic scale protective layer (7), a ceramicized skeleton layer (8), a self-healing fireproof putty (9), a space-grade heat insulation outer layer (10), and a cable transport pipeline. From back to front, the cable gene-lock nano-coating (1) is the first layer of the fireproof wall structure. The biomimetic honeycomb buffer layer (2) is closely connected to the cable gene-lock nano-coating (1). The shape memory alloy constraint mesh (3) is laid on the surface of the biomimetic honeycomb buffer layer (2). The fire-resistant filler layer... (4) Set on the shape memory alloy constraint mesh (3), its interior is filled with intumescent fireproof material, the fireproof partition skeleton layer (5) adopts a high-strength fireproof coating board, and is firmly pressed with the fireproof bag filling layer (4) through hot pressing process, the fiber optic nerve network (6) is laid on the surface of the fireproof partition skeleton layer (5), the bionic scale protective layer (7) is directly connected to the fiber optic nerve network (6), the ceramic skeleton layer (8) is firmly connected to the bionic scale protective layer (7) through adhesive, and the space heat insulation outer layer (10) serves as the terminal protective layer of the fireproof wall structure, and is seamlessly bonded to the ceramic skeleton layer (8) through self-healing fireproof mud (9).

2. A fire-resistant partition fire-resistant wall structure for cable trays according to claim 1, characterized in that: The coating thickness of the cable gene lock nano-coating (1) is controlled at 0.08-0.12 mm.

3. A fire-resistant partition fire-resistant wall structure for cable trays according to claim 1, characterized in that: The biomimetic honeycomb buffer layer (2) is made of polyimide foam material.

4. A fire-resistant partition fire-resistant wall structure for cable trays according to claim 1, characterized in that: The shape memory alloy constraint mesh (3) is woven from nickel-titanium shape memory alloy wires through warp and weft.

5. A fire-resistant partition fire-resistant wall structure for cable trays according to claim 1, characterized in that: The cable conveying pipeline includes, from the outside to the inside, a metal armored protective outer layer (11), an intumescent fire-retardant core layer (12), a fireproof sealing composite layer (13), and a nano-ceramic inner coating layer (14). The metal armored protective outer layer (11) is formed into a mechanical protective shell by a spiral winding process. The intumescent fire-retardant core layer (12) is filled inside the metal armored protective outer layer (11). The fireproof sealing composite layer (13) is firmly bonded to the intumescent fire-retardant core layer (12) by an adhesive. The nano-ceramic inner coating layer (14) is the innermost layer and is connected to the fireproof sealing composite layer (13).

6. A fire-resistant partition fire-resistant wall structure for cable trays according to claim 5, characterized in that: The fireproof sealing composite layer (13) contains multiple layers of expanded graphite and silicone rubber composite material.

7. A fire-resistant partition fire-resistant wall structure for cable trays according to claim 1, characterized in that: The intumescent fireproof material in the fire-retardant pack filling layer (4) is a composite particle of aluminum hydroxide and melamine cyanurate, with the particle diameter controlled at 0.5-2 mm, and the particles are bonded together by sodium silicate solution.

8. A fire-resistant partition fire-resistant wall structure for cable trays according to claim 1, characterized in that: The high-strength fireproof coating of the fireproof partition skeleton layer (5) is 3-5mm thick, and its surface is distributed with honeycomb-shaped through holes with a diameter of 2-3mm, and the through holes are filled with glass fiber cotton.

9. A fire-resistant partition fire-resistant wall structure for cable trays according to claim 1, characterized in that: The ceramicized skeleton layer (8) is made of lightweight mullite ceramic plate.

10. A fire-resistant partition fire-resistant wall structure for cable trays according to claim 1, characterized in that: The self-healing fireproof putty (9) uses smart gel material.

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