Fluid fire shield and manufacturing process thereof

Abstract

The present application belongs to the technical field of fireproof cover, and particularly relates to a fluid type fireproof cover and a manufacturing process thereof, which comprises a cover body, wherein the cover body is composed of an outer fireproof layer, a middle heat insulation layer and an inner sealing layer; the outer fireproof layer, the middle heat insulation layer and the inner sealing layer are stacked in sequence and form a four-layer composite structure of the outer fireproof layer-middle heat insulation layer-outer fireproof layer-inner sealing layer in the edge area of the cover body, and the connecting seam between the inner sealing layer and the outer fireproof layer is hidden under the outer fireproof layer; the cover body is further provided with a breathing assembly, a temperature sensor and a control module, the breathing assembly and the temperature sensor are electrically connected with the control module, the breathing assembly releases gas according to the data of the temperature sensor to maintain the oxygen amount inside the cover body and keep positive pressure outside the cover body, and the fireproof effect can be improved through active and passive double actions.

Description

Technical Field

[0001] This invention belongs to the technical field of fireproof covers, specifically relating to a fluid-type fire-resistant cover and its manufacturing process. Background Technology

[0002] As a specialized passive fire barrier, the core function of a fireproof cover is to provide critical thermal insulation and flame barrier for the protected object, equipment, or structure in a fire or abnormally high temperature environment, thereby buying valuable emergency response time, preventing the spread of fire, and reducing property damage and accident risks. Existing flexible fireproof covers work together through three functional layers: the outermost layer is the first line of defense against flames and radiant heat, made of materials such as fiberglass cloth, aramid aluminum foil cloth, basalt fiber cloth, or specially treated ceramic fiber fabric, which has an extremely high melting point, excellent fire resistance, and certain mechanical strength, and can directly resist flame erosion and high-temperature impact; the middle layer is the core heat insulation layer, usually made of loose, porous ceramic fiber felt, high silica cotton, or aerogel, which greatly blocks heat conduction and convection through a large number of static air pores inside the material, significantly slowing down the rate of heat transfer to the unexposed side; the inner layer focuses on sealing, wear resistance, and corrosion resistance, and also adds heat reflective layers such as aluminum foil to further reduce radiative heat transfer. The entire cover is formed by sewing, lamination, or modular assembly.

[0003] However, while existing flexible fireproof covers achieve excellent fireproof and heat insulation performance in their main body, the edge banding often becomes a structural weakness and a primary failure point in the overall protection system. The root cause of this problem lies in the systemic weakness resulting from the interaction of materials, structure, and manufacturing processes under harsh thermal environments. First, at the material level, there is an inherent mismatch in thermal properties. The reinforcing webbing or ordinary flame-retardant fabric commonly used for edge banding often has lower fire resistance limits and thermal stability than the main composite fabric, making it prone to decomposition or shrinkage at high temperatures. Second, at the structural level, irreversible mechanical damage and thermal defects occur. The puncture action of sewing machine needles creates microscopic pores in the fireproof layer, becoming preferential channels for heat flow; furthermore, the compression and folding of multi-layer composite materials during sewing severely compresses the core insulation layer at the edges, reducing its thickness and porosity, forming localized "thermal bridges" that allow heat to bypass the main high-efficiency insulation layer and transfer rapidly.

[0004] More critically, existing flexible fireproof covers rely solely on the physical properties of the materials themselves for "passive" defense, lacking the ability to actively sense and adjust to environmental changes. In complex firefighting or extreme fire environments, the internal environment of the cover is dynamically changing, and current technology cannot monitor the internal temperature and oxygen concentration in real time, leading to the risk of users facing oxygen deficiency or asphyxiation from high temperatures without warning. Simultaneously, existing covers cannot create a stable positive pressure environment, allowing toxic fumes to easily seep into the cover through gaps when external smoke concentrations are high or air pressure fluctuates. This purely passive insulation-based protection mode lacks the ability to actively maintain an internal survival environment when facing prolonged, high-intensity fire threats, limiting further improvements in overall protective effectiveness.

[0005] Based on this, in order to solve the structural thermal bridge defects in the existing fireproof cover edge-wrapping process, and the problem that relying solely on passive material protection cannot improve the fire protection effect through both active and passive effects, a fluid-type fireproof cover and its manufacturing process are proposed. Summary of the Invention

[0006] To address the aforementioned problems in the prior art, this invention provides a fluid-type fire-resistant cover and its manufacturing process.

[0007] The objective of this invention can be achieved through the following technical solutions: The present invention discloses a fluid-type fire-resistant cover, comprising a cover body composed of an outer fireproof layer, a middle heat insulation layer, and an inner sealing layer. The outer fireproof layer, the middle heat insulation layer, and the inner sealing layer are stacked sequentially and form a four-layer composite structure at the edge region of the cover body, consisting of an outer fireproof layer, a middle heat insulation layer, an outer fireproof layer, and an inner sealing layer stacked sequentially. The connection seam between the inner sealing layer and the outer fireproof layer is stacked and hidden below the outer fireproof layer. The cover body also includes a breathing component, a temperature sensor, and a control module. The breathing component and the temperature sensor are electrically connected to the control module. The breathing component releases gas according to the temperature sensor data to maintain the oxygen level inside the cover body and maintain positive pressure on the outside of the cover body.

[0008] As a further embodiment of the present invention, the breathing assembly includes a compressed gas cylinder, a pressure reducing valve, a flow control valve, and a gas distributor; multiple temperature sensors are distributed at different positions inside the hood; the control module includes a microcontroller and a power supply, the microcontroller receives signals from the temperature sensors, and when the detection value of any temperature sensor exceeds a preset threshold, the microcontroller controls the flow control valve to open, so that the gas in the compressed gas cylinder is evenly released into the hood through the pressure reducing valve and the flow control valve and then by the gas distributor, in order to maintain the oxygen content inside the hood and establish positive pressure outside the hood; the control module is also connected to a pressure sensor for monitoring the pressure inside the hood and an oxygen sensor for monitoring the oxygen concentration, and the microcontroller adjusts the opening of the flow control valve according to the feedback signals from the pressure sensor and the oxygen sensor to dynamically maintain the set positive pressure range and oxygen concentration range.

[0009] A manufacturing process for a fireproof cover includes an outer fireproof layer, a middle heat insulation layer, and an inner sealing layer. The manufacturing process includes the following steps: S1: Using the middle insulation layer as the base layer, the inner sealing layer is pre-fixed in the central area of ​​the middle insulation layer by point bonding, and at the same time, a periodically distributed array of positioning grooves is preset in the edge area of ​​the middle insulation layer. The depth of the positioning grooves is 20%-50% of the thickness of the middle insulation layer. S2: Fix the outer fireproof layer to the outer surface of the middle insulation layer and bend it inward along the edge to wrap it; during the bending process, the outer fireproof layer forms regular folds at the corresponding positions of the positioning groove; S3: The edge area of ​​the inner sealing layer is attached and fixed to the surface of the outer fireproof layer facing inward. The inner sealing layer forms a folded protrusion at the root of the fold. The fold and the folded protrusion are embedded in the positioning groove and bonded or sewn to form a mechanical anchor. The folded protrusion, the root of the fold of the outer fireproof layer and the middle heat insulation layer form a three-layer interlocking structure. S4: On the inside of the fireproof cover, all pleats are tilted and overlapped to the same side and sewn together, so that the connection seam between the inner sealing layer and the outer fireproof layer is overlapped under the pleats, so that the edge area of ​​the fireproof cover forms a four-layer composite structure consisting of an outer fireproof layer, a middle heat insulation layer, an outer fireproof layer, and an inner sealing layer.

[0010] As a further embodiment of the present invention, in step S2, when the outer fireproof layer is fixed to the outside of the middle heat insulation layer, the fixing area is located in the non-edge area outside the middle heat insulation layer, and the fixing method is continuous or intermittent stitching, adhesive bonding or heat pressing.

[0011] As a further embodiment of the present invention, in step S2, after the edge portion of the outer fireproof layer is bent inward, its end is pre-bonded and fixed to the unexposed side of the middle heat insulation layer using a high-temperature resistant adhesive.

[0012] As a further aspect of the present invention, in step S2, the wrapping structure of the inner bend portion forms a double outer fireproof layer at the bend of the outer fireproof layer, and an elastic buffer layer is provided between the double outer fireproof layers. The elastic buffer layer is made of silicone rubber or ceramic fiber rope, which is used to absorb thermal expansion stress and enhance the sealing of the edges.

[0013] As a further aspect of the present invention, step S2a is included between steps S2 and S3: an elastic filler is pre-placed in the positioning groove, wherein the elastic filler is a ceramic fiber rope or an intumescent fire-resistant sealing strip; when the outer fireproof layer is bent to form folds, the elastic filler is compressed and stores energy; after the sewing is completed in step S4, the elastic filler continues to apply a restoring force outward, so that the root of the fold is kept in close contact with the wall of the groove, compensating for the gap caused by the difference in thermal expansion of materials at high temperature.

[0014] As a further aspect of the present invention, in step S3, the edge of the inner sealing layer is pre-molded to form a pre-formed rib that matches the positioning groove array. When the inner sealing layer bends with the outer fireproof layer, the pre-formed rib aligns and is embedded in the positioning groove, thereby achieving the alignment and positioning of the inner sealing layer and the middle heat insulation layer.

[0015] As a further aspect of the present invention, before performing step S4, a step of flattening the outer fireproof layer that is bent and wrapped around the edge of the middle insulation layer is included, applying radial compression force to the entire edge of the fireproof cover and holding it for 5-30 seconds, so that the fold gaps of the outer fireproof layer are closed and the folded protrusions of the inner sealing layer are fully fitted with the wall of the positioning groove.

[0016] As a further aspect of the present invention, in step S4, the sewing thread used for the sewing connection is a high-temperature resistant inorganic fiber sewing thread, and the sewing stitch is located on the side of the inner sealing layer edge facing the surface of the protected object, so that the sewing thread is located inside the protected object when the fireproof cover is in use.

[0017] The beneficial effects of this invention are as follows: The fireproof enclosure utilizes its composite layer structure to provide passive protection: an outer fireproof layer resists external flames; a middle insulation layer blocks heat conduction; and an inner sealing layer ensures airtightness. The four-layer overlapping and interlocking structure at the edges effectively prevents flames from entering through the edge seams. An active protection system injects gas, and the release of this gas has two key functions: first, the continuous injection of fresh gas maintains the oxygen content inside the enclosure, ensuring personnel can breathe normally in the confined space; second, the continuous gas input creates a positive pressure environment, with the internal pressure slightly higher than the external atmospheric pressure. This positive pressure effectively prevents toxic fumes and high-temperature gases from seeping into the enclosure through tiny gaps, protecting personnel from smoke inhalation; third, the injection of fresh gas displaces the existing gas inside the enclosure, lowering the internal temperature and providing a cooling effect.

[0018] Periodic stress relief points are created at the edges through pre-set positioning grooves. When the outer fireproof layer bends inward, it naturally buckles at the corresponding position in the groove due to localized stiffness reduction, forming regular folds. The roots of the folds are embedded in the grooves, forming mechanical anchoring. The edge of the inner sealing layer forms folded protrusions simultaneously with the bending of the outer layer. Together, they fill the remaining space in the groove, forming a three-layer spatial interlock with the wall of the middle groove: "outer layer folds - middle layer groove wall - inner layer folded protrusions". Finally, all folds are tilted and overlapped to the same side and sewn together, so that the seam is completely covered and shielded by the outer fireproof layer.

[0019] By concealing continuous seams beneath overlapping folds and utilizing a multi-layered interlocking structure to disperse heat flow, the "heat-conducting lines" formed by traditional edging seams are effectively blocked. The pre-set positioning grooves avoid full-thickness compression for sewing; the middle insulation layer is only locally thinned at the grooves, preserving its bulky structure and insulation performance in most areas. The resulting four-layer composite edge—outer layer-middle layer-outer layer-inner layer—has a higher thickness and density than the center of the cover, structurally reversing the weak nature of traditional edging and transforming it into a reinforced protective barrier. Attached Figure Description

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the side cross-section of the cover body of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the edge cross-section of the present invention; Figure 4 This is a flowchart of the steps of the present invention.

[0022] Explanation of reference numerals in the attached diagram: 1. Inner sealing layer; 2. Outer fireproof layer; 3. Groove; 4. Pleats; 5. Middle insulation layer; 6. Breathing assembly; 7. Temperature sensor. Detailed Implementation

[0023] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0024] like Figures 1-4 As shown, a fluid-type fire-resistant enclosure includes an enclosure body composed of an outer fireproof layer 2, a middle heat insulation layer 5, and an inner sealing layer 1. The outer fireproof layer 2, the middle heat insulation layer 5, and the inner sealing layer 1 are stacked sequentially and form a four-layer composite structure at the edge of the enclosure, consisting of the outer fireproof layer 2, the middle heat insulation layer 5, the outer fireproof layer 2, and the inner sealing layer 1. The seam between the inner sealing layer 1 and the outer fireproof layer 2 is hidden under the outer fireproof layer 2. The enclosure body is also equipped with a breathing assembly 6, a temperature sensor 7, and a control module. The breathing assembly 6 and the temperature sensor 7 are electrically connected to the control module. The breathing assembly 6 releases gas based on the data from the temperature sensor 7 to maintain the oxygen level inside the enclosure and maintain positive pressure on the outside of the enclosure.

[0025] The breathing assembly 6 includes a compressed gas cylinder, a pressure reducing valve, a flow control valve, and a gas distributor; multiple temperature sensors 7 are distributed at different locations inside the hood; the control module includes a microcontroller and a power supply. The microcontroller receives signals from the temperature sensors 7. When the detection value of any temperature sensor 7 exceeds a preset threshold, the microcontroller controls the flow control valve to open, so that the gas in the compressed gas cylinder is evenly released into the hood through the pressure reducing valve and the flow control valve and then by the gas distributor, in order to maintain the oxygen content inside the hood and establish positive pressure outside the hood; the control module is also connected to a pressure sensor for monitoring the pressure inside the hood and an oxygen sensor for monitoring the oxygen concentration. The microcontroller adjusts the opening of the flow control valve according to the feedback signals from the pressure sensor and the oxygen sensor to dynamically maintain the set positive pressure range and oxygen concentration range.

[0026] At the fire scene, the fire shield provides passive protection thanks to its composite layer structure: the outer fireproof layer 2 resists external flames; the middle heat insulation layer 5 blocks heat conduction; and the inner sealing layer 1 ensures airtightness. The four-layer stacked interlocking structure at the edges effectively prevents flames from entering through the edge seams. Simultaneously, the active protection system activates. Initially, the flow control valve is closed. As the fire progresses and the external temperature rises sharply, heat is conducted through the shield to the interior, causing the internal temperature to rise. Once any temperature sensor 7 detects a temperature value exceeding the preset safety threshold in the microcontroller, the microcontroller immediately outputs a control signal to open the flow control valve. The high-pressure gas in the compressed cylinder is reduced to the set pressure by the pressure reducing valve and then delivered to the gas distributor through the flow control valve. The gas distributor evenly releases the gas into the interior space of the shield.

[0027] The release of gas serves three key functions: First, the continuous injection of fresh gas maintains the oxygen content inside the enclosure, ensuring that personnel can breathe normally in the confined space. Second, the constant influx of gas keeps the internal pressure slightly higher than the external atmospheric pressure, creating a positive pressure environment. This positive pressure effectively prevents toxic fumes and high-temperature gases from seeping into the enclosure through tiny gaps, protecting personnel from smoke inhalation. Third, the injection of fresh gas displaces the existing gas inside the enclosure, lowering the temperature and providing a cooling effect.

[0028] During continuous operation, the pressure sensor and oxygen concentration sensor feed back real-time monitoring data on gas pressure and oxygen concentration to the microcontroller, respectively. The microcontroller adjusts the opening of the flow control valve according to the preset optimal positive pressure range and optimal oxygen concentration range. If the gas pressure is too high, the opening is reduced; if the oxygen concentration is too low, the opening is increased. This closed-loop feedback control enables on-demand and precise gas release, maximizing the availability time of the limited gas source.

[0029] The present invention discloses a manufacturing process for a fireproof cover, comprising an outer fireproof layer 2, a middle heat insulation layer 5, and an inner sealing layer 1, the manufacturing process comprising the following steps: S1: Using the middle insulation layer 5 as the base layer, the inner sealing layer 1 is pre-fixed in the central area of ​​the middle insulation layer 5 by point bonding. At the same time, a periodically distributed array of positioning grooves 3 is pre-set in the edge area of ​​the middle insulation layer 5. The depth of the positioning grooves 3 is 20%-50% of the thickness of the middle insulation layer 5. S2: Fix the outer fireproof layer 2 to the outer surface of the middle heat insulation layer 5, and bend it inward along the edge to wrap it; during the bending process, the outer fireproof layer 2 forms regular folds 4 at the corresponding position of the positioning groove 3; S3: The edge area of ​​the inner sealing layer 1 is attached and fixed to the surface of the outer fireproof layer 2 facing inward. The inner sealing layer 1 forms a folded protrusion at the root of the fold 4. The fold 4 and the folded protrusion are embedded in the positioning groove 3 and bonded or sewn to form a mechanical anchor. The folded protrusion, the root of the fold 4 of the outer fireproof layer 2 and the middle heat insulation layer 5 form a three-layer interlocking structure. S4: On the inside of the fireproof cover, all the pleats 4 are tilted and overlapped to the same side and sewn together, so that the connection seam between the inner sealing layer 1 and the outer fireproof layer 2 is overlapped under the pleats 4, so that the edge area of ​​the fireproof cover formed a four-layer composite structure consisting of the outer fireproof layer 2, the middle heat insulation layer 5, the outer fireproof layer 2, and the inner sealing layer 1.

[0030] Periodic stress relief points are formed at the edge through the pre-set positioning groove 3. When the outer fireproof layer 2 bends inward, it naturally buckles at the corresponding position of the groove 3 due to the local reduction in stiffness, forming regular folds 4. The roots of the folds 4 are embedded in the groove 3 to form a mechanical anchor. The edge of the inner sealing layer 1 forms a folded protrusion synchronously with the bending of the outer layer. The two together fill the remaining space of the groove 3, forming a three-layer spatial interlock with the wall of the middle groove 3: "outer layer folds 4 - middle layer groove 3 wall - inner layer folded protrusion". Finally, all the folds 4 are tilted and overlapped to the same side (towards the center of the enclosure) and sewn together, so that the seam is completely covered and shielded by the outer fireproof layer 2.

[0031] By concealing continuous seams beneath overlapping pleats 4 and utilizing a multi-layered interlocking structure to disperse heat flow, the "heat-conducting lines" formed by traditional edging seams are effectively blocked. The pre-set positioning groove 3 avoids full-thickness compression for sewing, and the edge of the middle insulation layer 5 is only locally thinned at the groove 3, preserving the bulky structure and insulation performance of most of its area. The resulting four-layer composite edge of "outer layer-middle layer-outer layer-inner layer" has a higher thickness and density than the center of the cover, structurally reversing the weak properties of traditional edging and transforming it into a reinforced protective barrier.

[0032] As a further aspect of the present invention, in step S2, when the outer fireproof layer 2 is fixed to the outside of the middle heat insulation layer 5, the fixing area is located in the non-edge area outside the middle heat insulation layer 5, and the fixing method is continuous or intermittent stitching, adhesive bonding, or heat pressing. The fixing area is strictly limited to the non-edge area to ensure that the outer material of the edge portion has sufficient freedom to deform during the subsequent bending and wrapping steps, and that the fixing stitches or adhesives at this location do not hinder the natural formation of the folds 4 or introduce additional stress concentration points.

[0033] As a further aspect of the present invention, in step S2, after the edge portion of the outer fireproof layer 2 is bent inward, its end is pre-bonded and fixed to the unexposed side of the middle heat insulation layer 5 using a high-temperature resistant adhesive. This is equivalent to adding a temporary "positioning pin" at the critical inner corner position. This prevents the edge portion of the outer fireproof layer 2 from springing back or shifting during subsequent operations, providing a stable intermediate state for the precise execution of steps S3 and S4.

[0034] As a further aspect of the present invention, in step S2, the wrapping structure of the inner bend forms a double outer fireproof layer 2 at the bend of the outer fireproof layer 2. An elastic buffer layer, made of silicone rubber or ceramic fiber rope, is provided between the two outer fireproof layers 2 to absorb thermal expansion stress and enhance the sealing of the edges. An elastic buffer layer is provided at the "C"-shaped inflection point formed by the bend (i.e., between the two outer fireproof layers 2). This layer can be made of materials such as silicone rubber or ceramic fiber rope, which have good compression resilience and temperature resistance. At room temperature, it fills the gaps and enhances the seal; at high temperatures during a fire, the different coefficients of thermal expansion of each layer will generate internal stress, which the elastic buffer layer can absorb through its own deformation. The provision of the elastic buffer layer effectively alleviates the risk of edge structure cracking, delamination, or warping caused by the accumulation of thermal stress, significantly improving the structural integrity and sealing durability of the fireproof cover under continuous high temperature or thermal shock conditions.

[0035] As a further aspect of the present invention, step S2a is included between steps S2 and S3: an elastic filler is pre-placed in the positioning groove 3, the elastic filler being a ceramic fiber rope or an intumescent fire-resistant sealing strip; when the outer fireproof layer 2 is bent to form folds 4, the elastic filler is compressed and stores energy. After sewing is completed in step S4, the elastic filler continues to apply a restoring force outward, keeping the root of the fold 4 tightly fitted to the wall of the groove 3, compensating for gaps caused by differences in material thermal expansion at high temperatures. During the process, the deformation of the outer fold 4 compresses and stores energy. After sewing is completed, the elastic body continues to apply a restoring force, keeping the root of the fold 4 tightly fitted to the wall of the groove 3. When a fire occurs, the middle insulation layer 5 may shrink slightly due to heat or the outer material may soften due to high temperatures, and this restoring force can compensate for any possible small gaps. If it is an intumescent material, it expands itself after being exposed to fire, further actively sealing any possible heat flow channels. This achieves an upgrade of edge sealing from static dependence to dynamic adaptation. It not only provides an initial tight fit, but also has the ability to adaptively compensate and actively enhance the seal in harsh thermal environments, greatly improving the reliability of the edges and the fire resistance limit.

[0036] As a further embodiment of the present invention, in step S3, the edge of the inner sealing layer 1 is pre-molded to form a pre-formed rib that matches the array of positioning grooves 3. When the inner sealing layer 1 bends with the outer fireproof layer 2, the pre-formed rib is aligned and embedded in the positioning groove 3, thereby achieving the alignment and positioning of the inner sealing layer 1 and the middle heat insulation layer 5.

[0037] Pre-formed ribs that match the array of grooves 3 in the middle layer are pre-molded. During assembly, these ribs act as positioning keys, quickly and accurately guiding the inner sealing layer 1 to the correct position, ensuring that its folded protrusions can be embedded into the corresponding grooves 3 without error. When the inner layer bends with the outer layer, the ribs generate tactile feedback at the opening of the grooves 3, guiding the operator to automatically align them. After the ribs are embedded in the grooves 3, they form a "convex-concave-convex" nested structure with the root of the outer layer folds 4.

[0038] As a further aspect of the invention, before performing step S4, a step of smoothing the outer fireproof layer 2, which is bent and wrapped around the edge of the middle insulation layer 5, is included. A radial compressive force is applied to the entire edge of the fireproof cover and held for 5-30 seconds, causing the gaps in the folds 4 of the outer fireproof layer 2 to close and the folded protrusions of the inner sealing layer 1 to fully conform to the wall of the positioning groove 3. Before final sewing, a smoothing process is added, applying a radial, uniform compressive force to the edge and holding it for a period of time. This process is similar to compaction and shaping, eliminating localized non-compliance or tiny gaps that may occur due to manual operation of the materials, closing the gaps in the folds 4, and achieving optimal physical contact at each interlocking interface.

[0039] As a further aspect of the present invention, in step S4, the sewing thread used for the connection is a high-temperature resistant inorganic fiber sewing thread, and the sewing stitch is located on the side of the inner sealing layer 1 facing the surface of the protected object, so that the sewing thread is located inside the protected object when the fireproof cover is in use. The sewing thread is not directly exposed to the flame, but only withstands radiant heat, and the sewing needle holes are covered by the folds 4 of the outer fireproof layer 2.

[0040] As a further embodiment of the present invention, the outer fireproof layer 2 is made of glass fiber cloth, basalt fiber cloth or ceramic fiber fabric; the middle heat insulation layer 5 is made of ceramic fiber felt, high silica cotton or aerogel composite material; and the inner sealing layer 1 is made of aluminum foil composite layer or wear-resistant fabric treated with flame retardant.

[0041] As a further aspect of the invention, after the sewing in step S3 is completed, the process further includes applying a high-temperature resistant sealant or attaching a high-temperature resistant sealing tape to the seam to completely seal the needle hole. Applying or attaching an additional layer of high-temperature resistant sealing material to the seam aims to physically cover and completely seal the microscopic holes left by the sewing needle. This achieves the ultimate sealing of the inherent defect of traditional processes—needle hole leakage—forming a multi-level, all-round sealing system from macroscopic structure to microscopic pores, making it virtually impossible for flames and high-temperature smoke to penetrate, greatly improving the overall airtightness and fire prevention capability of the fireproof cover.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A fluid-type fire-resistant cover, characterized in that: The enclosure includes a housing composed of an outer fireproof layer, a middle heat insulation layer, and an inner sealing layer. These layers are stacked sequentially at the edge of the housing, forming a four-layer composite structure: an outer fireproof layer, a middle heat insulation layer, an outer fireproof layer, and an inner sealing layer. The seam between the inner sealing layer and the outer fireproof layer is concealed beneath the outer fireproof layer. The housing also includes a breathing assembly, a temperature sensor, and a control module. Both the breathing assembly and the temperature sensor are electrically connected to the control module. The breathing assembly releases gas based on the temperature sensor data to maintain the oxygen level inside the housing and to maintain positive pressure on the outside of the housing.

2. The fluid-type fire-resistant cover according to claim 1, characterized in that: The breathing assembly includes a compressed gas cylinder, a pressure reducing valve, a flow control valve, and a gas distributor. Multiple temperature sensors are distributed at different locations inside the hood. The control module includes a microcontroller and a power supply. The microcontroller receives signals from the temperature sensors. When the detection value of any temperature sensor exceeds a preset threshold, the microcontroller controls the flow control valve to open, allowing gas from the compressed gas cylinder to be evenly released into the hood via the gas distributor after passing through the pressure reducing valve and the flow control valve, thus maintaining the oxygen content inside the hood and establishing positive pressure outside the hood. The control module is also connected to a pressure sensor for monitoring the pressure inside the hood and an oxygen sensor for monitoring the oxygen concentration. The microcontroller adjusts the opening of the flow control valve based on the feedback signals from the pressure sensor and the oxygen sensor to dynamically maintain the set positive pressure range and oxygen concentration range.

3. A manufacturing process for a fireproof cover, applicable to a fluid-type fire-resistant cover as described in any one of claims 1-2, characterized in that: It comprises an outer fireproof layer, a middle heat insulation layer, and an inner sealing layer, characterized in that: the manufacturing process includes the following steps: S1: Using the middle insulation layer as the base layer, the inner sealing layer is pre-fixed in the central area of ​​the middle insulation layer by point bonding, and at the same time, a periodically distributed array of positioning grooves is preset in the edge area of ​​the middle insulation layer. The depth of the positioning grooves is 20%-50% of the thickness of the middle insulation layer. S2: Fix the outer fireproof layer to the outer surface of the middle insulation layer and bend it inward along the edge to wrap it; during the bending process, the outer fireproof layer forms regular folds at the corresponding positions of the positioning groove; S3: The edge area of ​​the inner sealing layer is attached and fixed to the surface of the outer fireproof layer facing inward. The inner sealing layer forms a folded protrusion at the root of the fold. The fold and the folded protrusion are embedded in the positioning groove and bonded or sewn to form a mechanical anchor. The folded protrusion, the root of the fold of the outer fireproof layer and the middle heat insulation layer form a three-layer interlocking structure. S4: On the inside of the fireproof cover, all pleats are tilted and overlapped to the same side and sewn together, so that the connection seam between the inner sealing layer and the outer fireproof layer is overlapped under the pleats, so that the edge area of ​​the fireproof cover forms a four-layer composite structure consisting of an outer fireproof layer, a middle heat insulation layer, an outer fireproof layer, and an inner sealing layer.

4. The manufacturing process of a fireproof cover according to claim 2, characterized in that: In step S2, when the outer fireproof layer is fixed to the outside of the middle insulation layer, the fixing area is located in the non-edge area outside the middle insulation layer, and the fixing method is continuous or intermittent stitching, adhesive bonding or heat pressing.

5. The manufacturing process of a fireproof cover according to claim 2, characterized in that: In step S2, after the edge of the outer fireproof layer is bent inward, its end is pre-bonded and fixed to the unexposed side of the middle heat insulation layer using a high-temperature resistant adhesive.

6. The manufacturing process of a fireproof cover according to claim 2, characterized in that: In step S2, the wrapping structure of the inner bend portion forms a double outer fireproof layer at the bend of the outer fireproof layer. An elastic buffer layer is provided between the double outer fireproof layers. The elastic buffer layer is made of silicone rubber or ceramic fiber rope, which is used to absorb thermal expansion stress and enhance the sealing of the edges.

7. The manufacturing process of a fireproof cover according to claim 2, characterized in that: Between steps S2 and S3, step S2a is also included: an elastic filler is pre-placed in the positioning groove, the elastic filler being a ceramic fiber rope or an intumescent fire-resistant sealing strip; when the outer fireproof layer is bent to form folds, the elastic filler is compressed and stores energy; after the sewing is completed in step S4, the elastic filler continues to apply a restoring force outward, so that the root of the fold is tightly fitted to the wall of the groove, compensating for the gap caused by the difference in thermal expansion of materials at high temperatures.

8. The manufacturing process of a fireproof cover according to claim 2, characterized in that: In step S3, the edge of the inner sealing layer is pre-molded to form a pre-formed rib that matches the positioning groove array. When the inner sealing layer bends with the outer fireproof layer, the pre-formed rib aligns and is embedded in the positioning groove, thereby achieving the alignment and positioning of the inner sealing layer and the middle heat insulation layer.

9. The manufacturing process of a fireproof cover according to claim 2, characterized in that: Before performing step S4, the process also includes a step of smoothing out the outer fireproof layer that is bent and wrapped around the edge of the middle insulation layer. A radial compression force is applied to the entire edge of the fireproof cover and held for 5-30 seconds to close the folds and gaps of the outer fireproof layer and fully fit the folded protrusions of the inner sealing layer with the wall of the positioning groove.

10. The manufacturing process of a fireproof cover according to claim 2, characterized in that: In step S4, the sewing thread used for the sewing connection is a high-temperature resistant inorganic fiber sewing thread, and the sewing stitch is located on the side of the inner sealing layer edge facing the surface of the protected object, so that the sewing thread is located inside the protected object when the fireproof cover is in use.

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