SAP stacked mass spray fireproof encapsulation system with built-in enclosure frame and its implementation method

Abstract

This invention discloses an SAP stack fireproof encapsulation system with an internal box frame and its implementation method. The system includes a water-absorbing and sealing unit that is fully covered and fixed to the inner wall of the frame, an internal spray unit integrated into the frame cavity, and a control unit. The control unit controls the internal spray unit to spray water mist onto the water-absorbing and sealing unit in a directional manner and dynamically controls the spray pattern to achieve continuous water replenishment and efficient heat absorption and evaporation, providing full coverage and sustainable dynamic fire protection for the box frame.

Description

Technical Field

[0001] This invention relates to the field of fire protection for light steel structures, specifically to an SAP stacked body spray fireproof encapsulation system with an internal box frame and its implementation method. Background Technology

[0002] Currently, energy storage cabinets and shipping containers generally adopt a box frame structure. Existing passive fire protection measures have problems such as insufficient durability and limited fire protection performance, making it difficult to meet actual fire protection needs.

[0003] Firstly, currently, thin-coat fire-retardant coatings are commonly used as a passive fire protection measure for container frame structures. However, energy storage cabinets and shipping containers are exposed to humid and variable outdoor environments for extended periods, and are frequently subjected to jolting during transportation, causing the coatings to degrade and peel off, severely reducing their fire-retardant effectiveness. Furthermore, because containers are typically densely stacked, fires can spread rapidly, making firefighting difficult and time-consuming. Therefore, existing thin-coat fire-retardant coatings are no longer sufficient to meet the higher fire protection requirements of current container frame structures.

[0004] Secondly, SAP materials possess excellent water absorption and retention properties, while water, due to its high heat capacity, economy, and wide availability, has become a commonly used fire extinguishing medium. Combining the two can form a fire protection solution with significant potential. Currently, this solution is only applied to the fire protection of cold-formed steel walls. The idea is to mix SAP with a certain proportion of water to form an SAP accumulator, which is then poured into the cavities of the steel components inside the wall. The structure is cooled by the heat absorbed by the evaporation of water during a fire. Although this idea can be applied to the fire protection of box-frame structures, the following key problems still exist: First, the SAP accumulator has a certain degree of fluidity and is prone to settling to the bottom under gravity, resulting in ineffective coverage of critical areas such as the top and sides of the main beams and the tops of the columns of the box frame; second, energy storage cabinets and shipping containers are often in outdoor environments, and the moisture in the cavities of the components is prone to evaporation. Once the moisture is severely lost, the fire protection performance will be essentially lost; finally, in existing examples of using SAP accumulators for structural fire protection, the moisture cannot be replenished during normal use or during a fire, making it difficult to maintain the fire protection performance in the long term. Therefore, this approach cannot fully cover the enclosure frame structure and achieve efficient cooling without weak points, and it lacks long-term reliable fire resistance, so it is not currently suitable for enclosure frame structures.

[0005] To address the aforementioned issues, there is an urgent need to propose a new fireproof structure for the box frame structure that combines full coverage, high durability, and sustainable fire protection. Summary of the Invention

[0006] To overcome the aforementioned shortcomings of existing technologies, this invention provides an SAP stacked body spray fireproof encapsulation system with an internal box frame and its implementation method. Based on the fireproofing principle of SAP stacked bodies applied to cold-formed steel walls, this system solves the problems of uneven distribution of SAP stacked bodies within the frame and rapid attenuation of fireproof performance. The SAP is uniformly and fully encapsulated within the box frame structure, and a controllable water system enables dynamic linkage with the SAP, achieving full-wall water mist contact and fixation with real-time mist volume control. This provides continuous and reliable fire protection for the box frame structure, effectively overcoming the defects of poor durability and insufficient fireproof performance of existing passive fireproofing measures.

[0007] The technical solution adopted by this invention to solve its technical problem is:

[0008] A SAP stack fireproof encapsulation system with an internal housing frame includes a water-absorbing and sealing unit, an internal spray unit, and a control unit. The water-absorbing and sealing unit is fixed to the inner wall of the housing frame structure in a full-coverage manner to support and seal superabsorbent resin. The internal spray unit is integrated into the internal cavity of the housing frame structure for directional water mist spraying onto the water-absorbing and sealing unit. The control unit controls the internal spray unit according to the fire status to dynamically adjust the water mist spray pattern of the water-absorbing and sealing unit. The spray coverage of the internal spray unit is coupled with the arrangement position of the water-absorbing and sealing unit, so that the water mist can be absorbed by the superabsorbent resin and evaporate with heat absorption.

[0009] Preferably, the water-absorbing and sealing unit includes a layered honeycomb structure and highly absorbent resin particles filled within its honeycomb cavities.

[0010] Preferably, the superabsorbent resin particles fill 1 / 4 to 1 / 2 of the volume of a single honeycomb cavity; the superabsorbent resin particles are gelled by water absorption and form a dense cured layer on the surface of the honeycomb cavity.

[0011] Preferably, the built-in spray unit includes a fluid distribution network and multiple omnidirectional atomizing spray units installed on the fluid distribution network; for the main beam of the box frame structure, the fluid distribution network is arranged along the entire length of the junction between the bottom surface and the unexposed side of the main beam; for the column of the box frame structure, the fluid distribution network is arranged along the entire length of the junction between the two unexposed sides of the column.

[0012] Preferably, the omnidirectional atomizing spray unit includes a single-spray base mounted on the fluid distribution network and an atomizing nozzle mounted on the single-spray base. The single-spray base is connected to the atomizing nozzle and the fluid distribution network. The atomizing nozzle is a fan-shaped nozzle. For the main beam, the spray direction of the atomizing nozzle is at an elevation angle greater than 45° and less than 90° relative to the bottom surface of the main beam. For the column, the spray direction of the atomizing nozzle is at an elevation angle greater than 45° and less than 90° relative to the back surface of the column.

[0013] Preferably, the inlet of the fluid distribution network is located at the intersection of two adjacent main beams and columns at the top, and the outlet of the fluid distribution network is located at the intersection of two adjacent ground beams and columns at the bottom of the box frame structure. The inlet and outlet of the fluid distribution network are arranged diagonally in the same plane of the box frame structure. Except for the outlet, the bottom of the fluid distribution network in the column direction is sealed with a pipe plug. All pipes of the fluid distribution network except for the inlet and outlet are connected by right-angle tee joints.

[0014] Preferably, the fluid distribution network is provided with a variable diameter hydraulic flow control multi-port connector at its inlet; the variable diameter hydraulic flow control multi-port connector includes an upper passage, a lower passage, and lateral branch pipes with different flow orifice diameters, and the variable diameter hydraulic flow control multi-port connector is provided with a sloped sealing baffle inside, which allows water to enter from the upper passage and, under hydraulic action, preferentially flow out through the lateral branch pipes to the fluid distribution network in the direction of the main beam; the lower passage is connected to the fluid distribution network in the direction of the column.

[0015] Preferably, the control unit controls the water flow rate and water mist spray range of the built-in spray unit by adjusting the opening degree of the valve connected to the built-in spray unit and the power of the water pump.

[0016] The present invention also provides a method for implementing the above system, comprising the following steps:

[0017] (1) The inner wall of the box frame structure is fully covered with water-absorbing and sealing units;

[0018] (2) An internal spray unit is integrated into the internal cavity of the box frame structure so that its spray range covers the water absorption and sealing unit;

[0019] (3) When a fire occurs, the built-in spray unit is activated and its water mist spray pattern is dynamically adjusted based on a preset strategy so that the water mist is adsorbed by the highly absorbent resin in the water-absorbing and sealing unit to form an accumulation and achieve dynamic heat absorption and evaporation.

[0020] Preferably, the water mist spray pattern is dynamically adjusted based on a preset strategy, specifically including: controlling the built-in spray unit to alternately execute a high-volume spray mode and a low-volume spray mode; using a high-volume spray mode for 25–30 seconds in the early stage of a fire, followed by a low-volume spray mode for 10–15 minutes; in the high-volume spray mode, the cross-sectional spray coverage angle of the atomizing nozzle of the built-in spray unit is 130°–140°, and the nozzle water pressure is 2.5–3 MPa, which can quickly and saturately replenish the four inner walls of the box frame structure with water, so that the water-absorbing sealing unit can fully absorb water and not fall off; in the low-volume spray mode, the cross-sectional spray coverage angle of the atomizing nozzle of the built-in spray unit is 90°–100°, and the nozzle water pressure is 0.2–0.3 MPa, which can achieve water mist coverage of the two fire-facing surfaces of the box frame structure. Beneficial effects

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. It solves the problems of uneven fire protection and peeling of existing fire-retardant coatings, achieving full coverage and high stability.

[0023] To address the issues of easy peeling off existing thin-coat fire-retardant coatings and uneven distribution due to gravity settling in traditional SAP stacking filling schemes, this invention fundamentally eliminates blind spots by sealing SAP particles in a layered honeycomb structure with a precise filling amount (1 / 4 to 1 / 2) and fully covering and fixing them to the inner wall of the frame. This "fixed-point, quantitative, and stable" encapsulation method ensures that the SAP will not settle or fall off during transportation, vibration, or fire, providing the enclosure frame with comprehensive fire protection without weak points and with high durability.

[0024] 2. It has broken through the bottleneck of "unsustainable fire protection performance" and achieved dynamic and sustainable fire protection.

[0025] To address the shortcomings of existing passive fire prevention measures (including static SAP packing), such as the inability to replenish moisture and the one-time degradation of fire resistance, this invention creatively introduces a built-in, adjustable sprinkler unit. The built-in sprinkler unit works in conjunction with the fixed SAP substrate to form a dynamic cycle of "adsorption-evaporation-replenishment-re-adsorption." By intelligently switching the spray pattern (high-volume spray mode and low-volume spray mode) of the atomizing nozzles of the built-in sprinkler unit through the control unit, moisture can be continuously replenished to the SAP packing throughout the entire fire process, achieving long-term, reliable evaporative heat absorption and cooling, completely changing the traditional static mode of passive fire prevention.

[0026] 3. It overcomes the contradiction between "low water mist utilization efficiency and SAP rinsing and shedding", and achieves a synergistic effect of high efficiency and precision.

[0027] This invention does not simply combine water with SAP (Solid Polymer Acrylic Atomizer), but rather achieves highly efficient synergy through precise system design. An optimized fluid distribution network layout tailored to the enclosure frame structure and atomizing nozzles at specific angles ensure that the water mist contacts the SAP substrate with the optimal path and coverage. By employing an alternating high- and low-pressure spray strategy (e.g., rapid saturation at 2.5-3.0 MPa and fine maintenance at 0.2-0.3 MPa), it guarantees both rapid response and thorough wetting in the early stages of a fire, while avoiding the erosion and damage to the SAP substrate caused by continuous high-pressure spraying. This significantly improves water resource utilization efficiency and the overall fire-resistant performance of the system.

[0028] 4. It possesses high adjustability and wide applicability, enhancing the universal value of the technical solution.

[0029] The system components of this invention, such as the length of the fluid distribution network, the nozzle spacing, and the elevation angle, can be flexibly adjusted according to the frame cross-sectional dimensions. The opening of the water source valve and the power of the water pump can also be adjusted as needed to precisely control the spray speed and coverage of the water mist. This system is suitable for box frame structures of various cross-sectional dimensions and lengths, demonstrating excellent versatility and adaptability.

[0030] 5. It provides "a new approach to fire prevention that integrates passive and active methods," demonstrating outstanding innovation and application value.

[0031] This invention is the first to deeply integrate SAP material and a controllable spray system into the internal frame structure of a housing, creatively proposing a novel fireproof structure that combines passive fire protection (SAP stack heat absorption) with active fire suppression (spray cooling). It successfully and stably "fixes" the cooling capacity of water to the structural surface through SAP over a long period, providing a new fireproof structure that combines full coverage, high durability, and sustainable fire protection. This offers a novel passive fireproofing solution for applications such as energy storage cabinets in energy storage power stations and shipping containers. Attached Figure Description

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Figure 1 This is a schematic diagram of the overall structure of the box frame structure provided in an embodiment of the present invention.

[0034] Figure 2 This is a schematic diagram of the main beam provided in an embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram of the column structure provided in an embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram of the structure of the omnidirectional atomizing spray unit provided in an embodiment of the present invention.

[0037] Figure 5 This is a schematic diagram of the structure of the fluid distribution network provided in an embodiment of the present invention.

[0038] Figure 6 This is a schematic diagram of the structure of a variable diameter hydraulic flow control multi-port joint provided in an embodiment of the present invention.

[0039] In the picture:

[0040] 1. Main load-bearing frame; 2. Water-absorbing sealing unit; 3. Built-in spray unit; 11. Main beam; 111. Backfire side of main beam; 112. Bottom surface of main beam; 12. Column; 121. Backfire side of column; 13. Ground beam; 21. Honeycomb structure; 22. Highly absorbent resin particles; 31. Fluid distribution network; 311. Pipe; 312. Variable diameter hydraulic flow control multi-way connector; 313. Right angle tee connector; 314. Pipe plug; 315. Sealing baffle; 32. All-around atomizing spray unit; 321. Single spray base; 322. Atomizing nozzle; 323. Fan-shaped nozzle. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0042] This embodiment provides a SAP stack fireproof encapsulation system with an internal housing frame, including a water-absorbing and sealing unit 2, an internal spray unit 3, and a control unit. The water-absorbing and sealing unit is fixed to the inner wall of the housing frame structure in a full-coverage manner to support and seal the superabsorbent resin. The internal spray unit is integrated into the internal cavity of the housing frame structure to spray water mist directionally onto the water-absorbing and sealing unit. The control unit is used to control the internal spray unit according to the fire status to dynamically adjust the water mist spray pattern of the water-absorbing and sealing unit. The spray coverage of the internal spray unit is coupled with the arrangement position of the water-absorbing and sealing unit, so that the water mist can be fixed by the superabsorbent resin and evaporate by absorbing heat.

[0043] The superabsorbent polymer in this embodiment is referred to as SAP.

[0044] This embodiment uses a standard 40-foot general-purpose dry cargo container as the application object. Other sizes of containers applied to this technical solution, where only the corresponding parts or structural dimensions are changed, are all within the protection scope of this application.

[0045] like Figure 1 As shown, the box frame structure of this example includes a main load-bearing frame 1 and a box-shaped cross-section ground beam 13 component. The main load-bearing frame 1 includes a box-shaped cross-section main beam 11 and column 12 components, which provide a structural carrier for the fireproof encapsulation system.

[0046] like Figures 2-3 As shown, the water-absorbing and sealing unit 2 includes a layered honeycomb structure 21 and superabsorbent polymer (SAP) particles 22 filled within its honeycomb cavities. The filling volume of the SAP particles 22 within the honeycomb cavities accounts for 1 / 4 to 1 / 2 of the volume of a single honeycomb cavity. The SAP particles 22 undergo water absorption and gelation, forming a dense and cured layer on the surface of the honeycomb cavity, thereby firmly encapsulating the SAP within the honeycomb structure 21. In this embodiment, the honeycomb structure 21 is made of flame-retardant polypropylene (PP) in the form of a layered circular honeycomb core material with a honeycomb pore size of 10 mm, a wall thickness of 0.1 mm, and a layer thickness of 10 mm. This material has good environmental stability and flame-retardant properties, ensuring that it does not spontaneously combust or produce molten droplets in the early stages of a fire. The SAP particles 22 are selected from heat-resistant sodium polyacrylate-based SAP, with a salt resistance ≥9 g / g (0.9% NaCl solution), a water absorption ratio ≥300 g / g (deionized water), and can remain stable for more than 30 minutes at 150°C. The SAP particle size is controlled between 80-120 mesh to ensure a balance between flowability and water absorption rate. A high-density fiberglass cloth with a basis weight of 200 g / m² is attached to one side of the honeycomb structure 21 to further enhance the SAP's sealing ability and prevent it from falling out of the honeycomb cells after absorbing water and forming a saturated mass. A water-absorbing sealing unit 2 is inserted into one end of the main load-bearing frame 1 and tightly adhered to the inner wall of the main load-bearing frame 1. It is then fixed to the inner wall of the main load-bearing frame 1 using large-head screws familiar to those skilled in the art, achieving full-coverage sealing of the inner wall. The honeycomb structure 21 has a trapezoidal cross-sectional shape, allowing the highly absorbent resin particles 22 to cover the inner wall of the main load-bearing frame 1 to the maximum extent.

[0047] like Figures 1-6 As shown, the built-in spray unit 3 includes a fluid distribution network 31 and multiple omnidirectional atomizing spray units 32 installed on the fluid distribution network. The fluid distribution network 31 is arranged inside the main load-bearing frame 1 through pipes 311 to form a connecting water channel. For the main beam 11, the fluid distribution network 31 is arranged along the entire length of the junction between the bottom surface 112 and the unexposed side surface 111 of the main beam; for the column 12, the fluid distribution network 31 is arranged along the entire length of the junction between the two unexposed sides 121 of the column. A plurality of omnidirectional atomizing spray units 32 are evenly distributed on the fluid distribution network 31, and the distribution spacing is determined according to the spray range of a single omnidirectional atomizing spray unit 32. In this embodiment, the spacing is set to 600 mm.

[0048] In this embodiment, pipe 311 is a stainless steel straight pipe with an outer diameter of 9.52 mm and a thickness of 0.7 mm. Its pressure resistance rating reaches up to 30 MPa, which meets the system working pressure requirements, is corrosion resistant and high temperature resistant.

[0049] like Figure 4 As shown, the omnidirectional atomizing spray unit 32 includes a single-spray base 321 and an atomizing nozzle 322. The single-spray base 321 has a single hole for connecting the atomizing nozzle 322. The atomizing nozzle 322 adopts a fan-shaped nozzle 323, which can atomize the water flow to form a wide-area coverage. For the main beam 11, the spray direction of the atomizing nozzle 322 is at an elevation angle greater than 45° and less than 90° relative to the bottom surface 112 of the main beam, and the larger the height-to-width ratio of the main beam 11 cross section, the larger the spray elevation angle of the atomizing nozzle 322; for the column 12, the spray direction of the atomizing nozzle 322 is at an elevation angle of 45° relative to the back-fire side 121 of the column; the above angle configuration, combined with the arrangement of the fluid distribution network 31 and the fan-shaped nozzle 323, can maximize the coverage of water mist in the cross-sectional direction of the main load-bearing frame component under the action of gravity, and can ensure that the two fire-facing surfaces of the main load-bearing frame 1 component can still be in continuous contact with water mist when the mist volume is small, and fix the water mist to the surface of the main load-bearing frame 1 component through the highly absorbent resin particles 22 to achieve efficient cooling.

[0050] The single-spray base 321 and the atomizing nozzle 322 adopt existing products or structures known to those skilled in the art, and their interconnection with the pipe 311 also adopts existing connection methods known to those skilled in the art.

[0051] like Figure 5 As shown, the inlet of the fluid distribution network 31 is located at the intersection of two adjacent main beams 11 and columns 12 at the top, and the outlet of the fluid distribution network 31 is located at the intersection of two adjacent ground beams 13 and columns 12 at the bottom of the box frame structure. The inlet and outlet of the fluid distribution network 31 are arranged diagonally in the same plane of the box frame structure. Except for the outlet, the bottom of the fluid distribution network 31 in the column direction is closed with pipe plugs 314. Except for the inlet and outlet, the pipes of the fluid distribution network 31 are connected by right-angle tee joints 313. The inlet of the fluid distribution network 31 is provided with a variable diameter hydraulic flow control multi-way joint 312.

[0052] like Figure 6As shown, the variable-diameter hydraulic flow control multi-port connector 312 includes an upper passage, a lower passage, and a lateral branch pipe that are interconnected. The upper passage is the water inlet with a flow orifice diameter of Φ32mm, which is larger than the flow orifice diameters of the lower passage and the lateral branch pipe. The lower passage and the lateral branch pipe have the same flow orifice diameter of Φ9.52mm. A sloped lower passage port sealing baffle 315 is provided at the depth of the upper passage into the variable-diameter hydraulic flow control multi-port connector 312. The sealing baffle 315 has a Φ9.52mm through hole at its center, which communicates with the lower passage and connects downwards to the fluid distribution network 31 in the direction of column 12. The lateral branch pipe is used to connect to the fluid distribution network 31 in the direction of main beam 11. After water flows through the upper passage into the chamber formed by the sealing baffle 315 and the upper passage, it preferentially flows at high speed into the fluid distribution network 31 in the direction of main beam 11 through the lateral branch pipe under hydraulic pressure.

[0053] The upper passage, lower passage, and lateral branch pipes, as well as the sealing baffle 315 in this example, adopt existing structures well known to those skilled in the art. The connections or arrangements between them not disclosed in this embodiment all adopt existing connections or arrangements well known to those skilled in the art. For shipping containers, the water source is seawater; for energy storage cabinets in energy storage power stations, the water source is a water storage tank well known to those skilled in the art, i.e., fresh water; the water supply adopts existing methods well known to those skilled in the art; other water supply methods are also within the scope of protection of this application.

[0054] The control unit controls the water flow rate of the built-in spray unit 3 and the cross-sectional spray coverage angle of the atomizing nozzle 322 by adjusting the valve opening and the power of the water pump connected to the built-in spray unit 3. The valve opening adjustment range is 0-180°, and the water pump power adjustment range is 980w-1500w.

[0055] The control unit, valves, and water pumps all adopt existing products or structures known to those skilled in the art, and their interconnection or control methods also adopt existing interconnection or control methods known to those skilled in the art.

[0056] This embodiment also provides an implementation method for the SAP stacked structure spray fireproof sealing system with an internal enclosure frame, specifically including the following steps:

[0057] S1. The honeycomb structure 21 is cut to a size that matches the inner wall of the main load-bearing frame 1, and highly absorbent resin particles 22 are filled into the honeycomb cells, with the filling volume accounting for 1 / 3 of the volume of a single honeycomb cavity. Using a metering spray device with an accuracy of ±5% known to those skilled in the art, 50±5 grams of deionized water are evenly sprayed onto one side of each square meter of the honeycomb structure 21. This allows the 1mm-2mm thick layer of highly absorbent resin particles 22 on the surface to fully gel, but not enough to penetrate the entire 10mm thick layer, thus forming a dense surface layer without causing premature saturation of the internal SAP. After spraying, the mixture is kept at a temperature of 23±2°C and a relative humidity of 50±10%. Under environmental conditions, let it stand for 30 minutes to complete gelation and air dry naturally until there is no obvious liquid water on the surface; after the surface super absorbent resin particles 22 absorb water, gel, and dry to form a dense surface layer, turn it over and repeat the above operation to form a tight sealing layer on both sides to stabilize the SAP; finally, attach a high-density glass fiber cloth known to those skilled in the art to the side that was sprayed with water for the first time to form a water-absorbing and sealing unit 2.

[0058] S2. Install holes are machined at equal intervals at corresponding positions on the inner wall of the main load-bearing frame 1 and the water-absorbing sealing unit 2. In this embodiment, the interval is 200mm. Insert the large-headed screw into the corresponding installation hole of the water-absorbing sealing unit 2, and insert the water-absorbing sealing unit 2 into the main load-bearing frame 1 with the side of the water-absorbing sealing unit 2 without the fiberglass cloth attached tightly against the inner wall of the main load-bearing frame 1, and align the installation hole position. Tighten the nut from one side of the outer wall of the main load-bearing frame 1 to make the water-absorbing sealing unit 2 tightly fixed to the inner wall of the main load-bearing frame 1. The nut of the large-headed screw is a disc shape with a diameter of 15mm, and the contact surface with the honeycomb structure 21 is attached with a high-temperature resistant washer known to those skilled in the art. The screw is of M4 specification. During installation, it is inserted from one side of the honeycomb structure 21. The disc-shaped nut and washer can evenly press the honeycomb structure surface without sinking into the hole. Finally, tighten the M4 anti-loosening nut on the outside of the main load-bearing frame 1.

[0059] S3. Cut the water-carrying pipe 311 into fixed-length pipe segments of uniform length. The length of each segment is determined based on the water mist coverage of the nozzles. In this embodiment, the fixed-length pipe segment is 600mm. Connect each pipe segment through a single-spray base 321 to form a pipe 311 of equal length to the main beam 11 or column 12 of the main load-bearing frame 1. Install one atomizing nozzle 322 on each single-spray base 321, and ensure that the elevation angle of all atomizing nozzles 322 on the same pipe 311 is consistent. For the main beam 11, the spray direction of the atomizing nozzle 322 is at a 60° elevation angle relative to the bottom surface 112 of the main beam; for the column 12, the spray direction of the atomizing nozzle 322 is at a 45° elevation angle relative to the back surface 121 of the column.

[0060] S4. Using existing methods well-known to those skilled in the art, pipe 311 is inserted into the main load-bearing frame 1 to form a fluid distribution network 31. Figure 5 As shown. For the main beam 11, the fluid distribution network 31 is installed along the entire length of the junction between the bottom surface 112 and the unexposed side surface 111 of the main beam; for the column 12, the fluid distribution network 31 is installed along the entire length of the junction between the unexposed surfaces 121 of the two columns. After the arrangement is completed, the fluid distribution network 31 is fixed to the main load-bearing frame 1 using pipe clamps and bolts known to those skilled in the art. The bottom end of the fluid distribution network 31 in the direction of the column 12 is sealed with a pipe plug 314 except for the outlet.

[0061] S5. Assemble the main load-bearing frame 1 containing the encapsulated water absorption and sealing unit 2 and the fluid distribution network 31 to form a box frame structure, and connect each fluid distribution network 31 through connectors: the inlet of the fluid distribution network 31 adopts a variable diameter hydraulic flow control multi-port connector 312; the different fluid distribution networks 31 are connected to each other through a right-angle tee connector 313 known to those skilled in the art, except for the inlet and outlet.

[0062] S6. A variable-diameter hydraulic flow control multi-port connector 312 is installed at the inlet of the fluid distribution network 31. The variable-diameter hydraulic flow control multi-port connector 312 is connected to a water source valve and a water pump known to those skilled in the art. High-temperature resistant temperature measuring units known to those skilled in the art are arranged and installed on both the fire-facing and fire-resistant sides of the main load-bearing frame 1 in a manner known to those skilled in the art. Two photoelectric smoke detectors known to those skilled in the art are installed at the top of the internal space of the box frame in a manner known to those skilled in the art. The high-temperature resistant temperature measuring units, photoelectric smoke detectors, water source valves and water pumps are electrically connected to the control unit in a manner known to those skilled in the art. After a fire occurs, the water source and pumping system known to those skilled in the art are activated. The valve opening and water pump power are adjusted by the control unit known to those skilled in the art, and the water flow velocity and water mist spray range of the built-in spray unit 3 are controlled in real time. The control unit controls the built-in spray unit 3 to alternately execute a large spray volume spray mode and a small spray volume spray mode. In the large spray volume spray mode, the valve opening and water pump power are at their maximum values, which are 180° and 1500w respectively, and the nozzle water pressure of the atomizing nozzle 322 is 3. At MPa, the cross-sectional spray coverage angle of the atomizing nozzle 322 of the built-in spray unit 3 is 135°, which can quickly and saturately replenish the four inner walls of the box frame structure with water, so that the water absorption and sealing unit 2 can fully absorb water and not fall off; in the small spray volume spray mode, the valve opening is 45°, and the water pump power is taken as the minimum value of 980w; the nozzle water pressure of the atomizing nozzle 322 is 0.2 MPa, at which time the cross-sectional spray coverage angle of the atomizing nozzle 322 of the built-in spray unit 3 is 95°, which can achieve water mist coverage of the two fire-facing surfaces of the box frame structure; when the temperature rise rate measured by two consecutive high temperature measuring units within 30 seconds is ≥10°C / s, and the absolute temperature exceeds 80°C When any photoelectric smoke detector alarms and the readings of any three or more high-temperature resistant temperature measuring units exceed 60°C, it is determined to be the initial stage of a fire. In the initial stage of a fire, a high-volume spray mode is used for 25–30 seconds, followed by a low-volume spray mode for 10–15 minutes. When the temperature on the unexposed side exceeds 140°C or the temperature on the exposed side exceeds 550°C, the high-volume spray mode is switched back for 25–30 seconds, and this cycle continues until the fire is over and the temperature at all measuring points of the high-temperature resistant temperature measuring units is below 60°C. In this example, the SAP spray fireproof sealing system is then shut down.

[0063] The control strategy described above in this embodiment is based on the control strategy when the water source is fresh water.

[0064] When the water source is seawater, the control strategy differs in that when the system switches to the low-volume spray mode, its maximum single operation time is limited to 8 minutes, and then it is forcibly switched to the high-volume spray mode for 30 seconds to prevent SAP from precipitating and clumping due to prolonged contact with high-concentration brine, thus maintaining its continuous effectiveness.

[0065] The control unit in this embodiment includes a programmable logic controller or an embedded microprocessor, which are well known to those skilled in the art. The programmable logic controller or embedded microprocessor is configured to execute the control strategy described above.

[0066] When applied to shipping containers, the water pump flow parts that come into contact with seawater, as is well known to those skilled in the art, are made of 316L stainless steel to resist corrosion from seawater chloride ions; at the inlet of the seawater source, a washable Y-type filter, as is well known to those skilled in the art, with a mesh size of 20 mesh and an aperture of approximately 0.84 mm, is added to prevent larger particles that may be present in the seawater from clogging the pipe 311 or the atomizing nozzle 322.

[0067] In this embodiment, apart from the main load-bearing frame 1, the other structures of the container adopt existing fireproof structures known to those skilled in the art. The six walls of the container are covered with rock wool boards known to those skilled in the art on both the inner and outer sides to form a protective layer. Fireproof doors and windows are installed in a manner known to those skilled in the art, and fireproof sealing is performed on the wall penetrations on the container in a manner known to those skilled in the art.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications and equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A SAP accumulation body spray fireproof packaging system with built-in box frame, characterized in that: The water absorption fixed sealing unit is fixed to the inner wall of the box frame structure in full paving mode and is used for carrying and fixed sealing of the super absorbent resin; the built-in spraying unit is integrated in the internal cavity of the box frame structure and is used for directional water mist spraying to the water absorption fixed sealing unit; the control unit is used for controlling the built-in spraying unit according to the fire state to dynamically adjust the water mist spraying mode of the water absorption fixed sealing unit; The spraying coverage range of the built-in spraying unit is coupled with the arrangement position of the water absorption fixed sealing unit, so that the water mist can be absorbed by the super absorbent resin and evaporated by heat absorption, the built-in spraying unit comprises a fluid distribution network and a plurality of omnibearing atomizing spraying units installed on the fluid distribution network; for the main beam of the box frame structure, the fluid distribution network is longitudinally arranged at the intersection of the bottom surface and the backfire side surface of the main beam; for the column of the box frame structure, the fluid distribution network is longitudinally arranged at the intersection of the two backfire surfaces of the column; the fluid distribution network is uniformly distributed with a plurality of omnibearing atomizing spraying units, and the distribution interval is determined according to the spraying range of a single omnibearing atomizing spraying unit.

2. The SAP accumulation body spray fireproof packaging system with built-in box frame according to claim 1, characterized in that: The water absorption fixed sealing unit comprises a sheet layer honeycomb structure and super absorbent resin particles filled in the honeycomb cavities.

3. The SAP accumulation body spray fireproof packaging system with built-in box frame according to claim 2, characterized in that: The filling volume of the super absorbent resin particles in the honeycomb cavities accounts for 1 / 4 to 1 / 2 of the volume of a single honeycomb cavity; the super absorbent resin particles are gelatinized by water absorption and form a dense solidified layer on the surface of the honeycomb cavities.

4. The SAP accumulation body spray fireproof packaging system with built-in box frame according to claim 1, characterized in that: The omnibearing atomizing spraying unit comprises a single spraying base installed on the fluid distribution network and an atomizing nozzle installed on the single spraying base, the single spraying base is in communication with the atomizing nozzle and the fluid distribution network, and the atomizing nozzle adopts a fan-shaped nozzle; for the main beam, the spraying direction of the atomizing nozzle is an elevation angle greater than 45° and less than 90° relative to the bottom surface of the main beam; for the column, the spraying direction of the atomizing nozzle is an elevation angle greater than 45° and less than 90° relative to the backfire surface of the column.

5. The SAP accumulation body spray fireproof packaging system with built-in box frame according to claim 1, characterized in that: The inlet of the fluid distribution network is arranged at the intersection of two adjacent main beams and columns at the top, the outlet of the fluid distribution network is arranged at the intersection of two adjacent floor beams and columns at the bottom of the box frame structure, and the inlet and the outlet of the fluid distribution network are diagonally arranged in the same plane of the box frame structure; the bottom end of the fluid distribution network in the column direction is closed by a pipe plug except the outlet; the pipelines of the fluid distribution network are connected by right-angle three-way joints except the inlet and the outlet.

6. The SAP accumulation body spray fireproof packaging system with built-in box frame according to claim 5, characterized in that: The inlet of the fluid distribution network is provided with a variable-diameter hydraulic flow control multi-way joint; the variable-diameter hydraulic flow control multi-way joint comprises an upper passage, a lower passage and a lateral branch pipeline with different flow passage diameters, and a blocking baffle with a slope is arranged in the variable-diameter hydraulic flow control multi-way joint, so that water flow enters the upper passage, and under the action of hydraulic pressure, the water flow preferentially flows out to the fluid distribution network in the main beam direction through the lateral branch pipeline; the lower passage is in communication with the fluid distribution network in the column direction.

7. The SAP accumulation body spray fireproof packaging system with built-in box frame according to claim 1, characterized in that: The regulating unit controls the water flow rate and water mist spraying range of the built-in spraying unit by regulating the valve opening degree and the power of the water pump.

8. The method of claim 1, wherein the SAP accumulation body spray fireproof packaging system with built-in box frame is characterized by: The method comprises the following steps: (1) fully fixing the water-absorbing and sealing unit on the inner wall of the box frame structure; (2) integrating a built-in spraying unit in the internal cavity of the box frame structure, so that the spraying range of the built-in spraying unit covers the water-absorbing and sealing unit; (3) when a fire occurs, the built-in spraying unit is started, and the water mist spraying mode is dynamically adjusted based on a preset strategy, so that the water mist is adsorbed by the superabsorbent resin in the water-absorbing and sealing unit to form an accumulation body and realize dynamic heat absorption and evaporation.

9. The method of claim 8, wherein the SAP accumulation body is a box frame. 9 The water mist spraying mode is dynamically adjusted based on a preset strategy, specifically including: arranging high-temperature-resistant temperature measuring units on the surfaces of the main beam and the column walls of the box frame structure, to control the built-in spraying unit to alternately execute a large-spraying-amount spraying mode and a small-spraying-amount spraying mode; the large-spraying-amount spraying mode is adopted for 25-30 seconds at the initial stage of a fire, and then the small-spraying-amount spraying mode is adopted for 10-15 minutes; when the temperature on the backfire surface of the main beam and the column of the box frame structure exceeds 140℃ or the temperature on the fire-facing surface exceeds 550℃, the large-spraying-amount spraying mode is adopted again for 25-30 seconds, and the cycle is repeated; the cross-sectional spraying coverage angle of the atomizing nozzle of the built-in spraying unit in the large-spraying-amount spraying mode is 130°-140°, and the water pressure of the nozzle is 2.5-3 MPa, so that the four inner walls of the box frame structure can be quickly and saturatedly supplied with water, so that the water-absorbing and sealing unit can fully absorb water and not fall off; the cross-sectional spraying coverage angle of the atomizing nozzle of the built-in spraying unit in the small-spraying-amount spraying mode is 90°-100°, and the water pressure of the nozzle is 0.2-0.3 MPa, so that the water mist can cover the two fire-facing surfaces of the box frame structure.

Images