High-temperature-resistant and corrosion-resistant fireproof valve

Abstract

The invention relates to the technical field of fireproof valve equipment, and discloses a high-temperature-resistant and corrosion-resistant fireproof valve which comprises a valve body shell, a plurality of fireproof blades for sealing an air duct are arranged in the valve body shell, and a wave leakage box is arranged at the bottom of the valve body shell; a thermosensitive alloy sheet for sensing the air duct temperature and triggering a valve switch is arranged in the middle of the top end of the inner wall of the valve body shell. By adding and arranging the attaching sealing mechanism, in the using process of the fireproof valve, on one hand, during daily ventilation of the fireproof valve, the first magnetic strip bases and the second magnetic strip bases on the adjacent fireproof blades can effectively buffer continuous vibration caused by airflow through magnetic attraction force, deformation and warping of the blades due to long-term vibration are avoided, and it is guaranteed that the blade structures are flat; and on the other hand, the blades are closed in a fire disaster, the V-shaped seat is matched with the insertion groove to achieve preliminary supporting and attaching, and deformation filling of the silica gel sealing gasket is matched, so that gaps formed after the blades are closed can be eliminated, the sealing tightness can be enhanced, and smoke leakage is eradicated.

Description

Technical Field

[0001] This invention relates to the field of fire damper equipment technology, specifically a high-temperature and corrosion-resistant fire damper. Background Technology

[0002] Fire dampers are critical fire safety devices installed in ventilation, air conditioning, and smoke exhaust ducts. Their core function is to automatically shut off airflow during a fire, preventing the spread of fire and smoke through the ducts, thereby dividing fire compartments and ensuring the safety of personnel evacuation. They are an indispensable component of building fire compartmentation systems. The fire-resistant blade, as the core actuator of the fire damper, directly determines the damper's sealing performance and fire and smoke barrier effect. The structural stability and operational reliability of the blade are crucial to the proper functioning of the fire damper.

[0003] During routine use, the blades of fire dampers remain open to ensure the normal operation of ventilation and air conditioning systems. During this process, the airflow within the ventilation duct continuously vibrates the blades, while the high-temperature environment inside the duct bakes them for extended periods, causing them to deform and warp. Once the blades deform and warp, they cannot close tightly when a fire hazard occurs and the fire damper needs to be closed, creating a sealing gap. This compromises the overall fireproof and smoke-blocking effect of the fire damper, failing to effectively prevent the spread of fire and smoke.

[0004] More seriously, during a fire, flammable smoke easily accumulates in ventilation ducts. This accumulated smoke, upon encountering an open flame or high-temperature environment, can cause localized deflagration or even an explosion, generating a momentary high-pressure gas surge. This surge, combined with the high-temperature environment and long-term airflow vibration within the duct, acts on the fire damper blades, further exacerbating their deformation, warping, and twisting. This leads to less tight blade closure and complete seal failure, severely weakening the fire damper's fire-resistant and smoke-blocking functions, failing to effectively protect building fire safety, and posing a significant safety hazard. Therefore, those skilled in the art have proposed a high-temperature and corrosion-resistant fire damper to address the aforementioned technical problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a high-temperature and corrosion-resistant fire damper, which solves the problem that fire damper blades are prone to deformation and warping due to long-term airflow disturbance, thus affecting the overall sealing performance of the fire damper.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-temperature and corrosion-resistant fire damper, comprising, The valve body housing has multiple fireproof blades inside to seal the air duct, and a wave-relief box is installed at the bottom of the valve body housing. A thermosensitive alloy sheet is installed at the top center of the inner wall of the valve body shell to sense the temperature of the air duct and trigger the valve opening and closing. A control box is installed at the top center of the valve body shell to receive the melting signal of the thermosensitive alloy sheet and to control the fireproof blades to close automatically. The fitting and sealing mechanism is installed on the fireproof blades to ensure the fitting and sealing effect between multiple fireproof blades when they are closed. The blade protection mechanism is installed on the fireproof blades and is used to protect the fireproof blades during use. A rigid limiting mechanism is installed inside the valve body housing to rigidly limit the fireproof blades that are sealed inside when the fire damper is closed. The multi-stage wave-relief mechanism, located inside the wave-relief box, is used to perform multiple pressure relief and buffering treatments on the shock wave airflow generated by deflagration and explosion in the air duct.

[0007] Preferably, the bonding and sealing mechanism includes overlapping edge grooves. Overlapping edge grooves are provided on both sides of the fireproof blade, and the two overlapping edge grooves on each fireproof blade are arranged diagonally. The surface of each overlapping edge groove is provided with a silicone sealing gasket. A magnetic strip seat one is provided in the middle of one overlapping edge groove, and a magnetic strip seat two is provided near the edge of the other overlapping edge groove. When the fireproof blade is in the open state, the magnetic strip seat one and magnetic strip seat two on two adjacent fireproof blades are attracted by the magnetic attraction between them to ensure the stability of the overall fireproof blade when passing through the airflow.

[0008] Preferably, the sealing mechanism further includes a strip seat, and a strip seat is fixedly connected to the middle of one side of the magnetic strip seat. A deformable V-shaped seat is provided on the end of the strip seat away from the fireproof blade. Silicone connecting pieces are provided on both sides of the inner wall of the V-shaped seat, and the ends of the silicone connecting pieces away from the V-shaped seat are respectively connected to the corresponding positions on both sides of the strip seat. An insertion groove matching the strip seat is opened in the middle of the overlapping side groove away from the V-shaped seat. Limiting side seats are staggered on both sides of the inner wall of the valve body shell.

[0009] Preferably, the blade protection mechanism includes concave grooves, and multiple sets of concave grooves are equally spaced on the middle of both sides of the fireproof blade. The multiple sets of concave grooves are symmetrically arranged on both sides of the fireproof blade, and ceramic strips are filled at the bottom of the inner side of each concave groove. Multiple cross reinforcing ribs are fixedly connected at equal intervals on both sides of the fireproof blade. A heat insulation cavity is opened inside each fireproof blade.

[0010] Preferably, the rigid limiting mechanism includes limiting holes, and multiple sets of limiting holes are equidistantly opened at the bottom of the inner wall of the valve body shell. Multiple mounting seats are fixedly connected at equal intervals on the bottom of both sides of the outer wall of the fireproof blade. A limiting rod is slidably connected to the middle of the inner side of each mounting seat, and the limiting rod matches the limiting hole.

[0011] Preferably, the multi-stage leakage mechanism includes flow channels. Flow channels are provided on both inner sides of the leakage box near the valve body shell. Two openings are provided on the bottom side of the inner wall of the valve body shell, and the bottom of the openings communicates with the interior of the corresponding flow channels. Magnetic ring seats are fixedly connected to the inner walls of the flow channels near the openings. The bottom of each magnetic ring seat is provided with a one-way magnetic sealing cover that can be opened by the impact of high-pressure airflow. Multiple connecting seats are fixedly connected at equal intervals on the top of both sides of the outer wall of the leakage box.

[0012] Preferably, the multi-stage wave-damping mechanism further includes counter-flow cavities. Multiple counter-flow cavities are equidistantly provided in the inner center of the wave-damping box. The multiple counter-flow cavities are connected by multiple sets of arc-shaped flow channels, and the first arc-shaped flow channels are respectively connected to the interior of the corresponding flow channels.

[0013] Preferably, the multi-stage bleed-out mechanism further includes a pressure relief chamber. A pressure relief chamber is provided on the side of the bleed-out box away from the flow channel. The arc-shaped diverter channel at the end is connected to the interior of the pressure relief chamber. Multiple discharge channels are equidistantly provided on the side of the bleed-out box away from the flow channel, and one end of each discharge channel is connected to the interior of the pressure relief chamber. Multiple inclined plates are fixedly connected at equal intervals inside each discharge channel. Multiple diverter holes are equidistantly provided on each inclined plate. Multiple unidirectional magnetic sealing covers are equidistantly provided on the end of the bleed-out box away from the valve body shell.

[0014] Working Principle: During normal operation of the fire damper, when a fire occurs in an area connected to the ventilation duct, the high-temperature smoke generated by the fire will rapidly spread into the ventilation duct. As the high-temperature smoke accumulates in the duct, when the temperature of the smoke inside the duct reaches a preset temperature threshold, the heat-sensitive alloy sheet inside the valve body will melt due to continuous heating. After the heat-sensitive alloy sheet melts, it sends a trigger signal to the control box. The control box then drives multiple fireproof blades inside the valve body to rotate synchronously until all fireproof blades are completely closed. The completely closed fireproof blades cut off the propagation path of the high-temperature smoke in the ventilation duct, effectively isolating and protecting other safe areas connected to the duct, preventing the further spread of fire and smoke. During routine use of the fire damper... During operation, the sealing mechanism is activated first and continues to work. When the fire damper is in safe operation or normal ventilation state, the airflow in the ventilation duct flows through the gaps between the fireproof blades inside the valve body shell, continuously vibrating the open fireproof blades. Prolonged vibration can easily cause blade deformation. At this time, a stable magnetic attraction is generated between the magnetic strip seat one at the front end and the magnetic strip seat two at the rear end of adjacent fireproof blades. This attraction can buffer the vibration impact of the airflow on the fireproof blades to the maximum extent, reducing the vibration amplitude. Simultaneously, the magnetic attraction between two adjacent fireproof blades can also keep the airflow stable, preventing airflow turbulence from exacerbating vibration, thus effectively preventing the fireproof blades from being damaged by continuous vibration during long-term operation. To prevent deformation and warping, and to ensure the structural integrity of the blades, in the event of a fire, the fireproof blades inside the valve body housing begin to rotate and close under the drive of the control box. During the rotation and closing process, the strip seat and V-shaped seat in the overlapping groove on the fireproof blade precisely align with the insertion slot on the adjacent fireproof blade and gradually enter it. During insertion, the V-shaped seat undergoes elastic deformation due to the compression of the inner wall of the insertion slot, thus smoothly passing through the insertion slot. Once the V-shaped seat is fully inserted and has passed through the insertion slot, the compression pressure it has experienced instantly disappears, and the V-shaped seat recovers its original V-shaped structure due to its own elasticity. The two ends of the reset V-shaped structure will tightly abut against the inner wall of the insertion slot of the adjacent fireproof blade, forming a reverse support and fixation, thereby completing the process. The initial bonding process during the sealing of the fireproof blades ensures the basic sealing performance of the closed blades. After the fireproof blades are rotated and sealed, the overlapping grooves at the edges of the fireproof blades will overlap and bond with each other. At the same time as the overlapping grooves overlap, the magnetic strip seat one and magnetic strip seat two on them will also move closer to each other through magnetic attraction. During the magnetic attraction process, the overlapping edges on the fireproof blades will be continuously pulled closer to each other. As the edges move closer, they will squeeze the silicone sealing gasket on them, causing the silicone sealing gasket to undergo elastic deformation. The deformed silicone sealing gasket can fully fill the tiny gaps left between the fireproof blades, achieving all-round sealing and barrier. This completes the re-bonding and sealing process during the sealing of the fireproof blades, further improving the sealing performance and preventing smoke leakage.Simultaneously, the blade protection mechanism activates. During normal airflow within the ventilation duct, the high-temperature environment continuously bakes the fireproof blades, potentially causing deformation and warping. To address this, multiple concave grooves on the fireproof blades effectively increase the surface area for heat dissipation, accelerating heat exchange between the blades and the airflow. This significantly improves the overall heat dissipation capacity of the fireproof blades during airflow, reducing overall blade temperature rise. Furthermore, the ceramic strips added within the concave grooves not only possess excellent thermal conductivity, quickly conducting and dissipating heat accumulated on the fireproof blades, but also utilize their elasticity to cushion the blades during heat exposure. The deformation generated during expansion and contraction helps suppress blade warping, further ensuring the structural stability of the blade. Simultaneously, the multiple sets of cross-shaped reinforcing ribs on the fire-resistant blades ensure that the overall blade retains the heat dissipation capacity of the concave grooves while significantly improving the blade's bending and warping stiffness through the cross-shaped reinforcing ribs, enhancing the blade's structural strength. This effectively counteracts the deformation forces generated by the blades under high-temperature environments, preventing bending and warping. Furthermore, the internal heat insulation cavity of the fire-resistant blades creates a hollow double-layer metal plate structure. This heat insulation cavity will form [further structure] when the blades are continuously subjected to heat flow impact. A stable air insulation layer effectively blocks the conduction of high-temperature heat to the interior of the blades. This, combined with the concave grooves on the surface of the fireproof blades, achieves a dual heat dissipation effect, significantly reducing the heat exposure of the blades and minimizing damage from high temperatures. This provides comprehensive protection for the fireproof blades during use. Simultaneously, the rigid limiting mechanism activates. In the event of a fire, the fire damper on the ventilation duct is successfully actuated, and the fireproof blades inside the valve housing begin to rotate and gradually complete the closing action. During the rotation of the fireproof blades, the mounting base and limiting rod on them rotate synchronously, ensuring that the limiting components and blade movements are synchronized. After the fire blade is fully rotated and closed, the mounting seat on the fireproof blade moves directly above the upper limit hole of the valve body shell. At this time, the bottom of the limiting rod on the mounting seat is no longer constrained by the top support force of the inner wall of the valve body. Under its own weight, the limiting rod slides down the mounting seat and smoothly inserts into the limiting hole in the valve body shell. Through the cooperation of the limiting rod and the limiting hole, the front and rear sides of the fireproof blade after rotation and closure are firmly limited, effectively preventing the fireproof blade from being displaced, loosened or even damaged when subjected to the impact airflow of deflagration, explosion or other shocks, ensuring that the blade always remains closed, thus completing the rigid limiting treatment of the fireproof blade after closure.When faced with the shock wave airflow generated by an explosion or deflagration within the ventilation duct, the multi-stage shock relief mechanism immediately activates. The instantaneous high-pressure shock wave generated by the explosion or deflagration propagates rapidly to the valve body shell, causing a sharp increase in pressure within the duct. When the pressure exceeds the withstand limit of the one-way magnetic sealing cover at the bottom of the magnetic ring seat, the one-way magnetic sealing cover at the bottom of the magnetic ring seat is opened by the instantaneous high-pressure shock wave. At this time, a portion of the instantaneous high-pressure shock wave in the ventilation duct is diverted through the opening in the valve body shell. The diverted instantaneous high-pressure shock wave smoothly enters the flow channel within the shock relief box through the opening. Simultaneously, due to the diversion of some shock waves, the impact intensity directly acting on the fireproof blades inside the valve body shell is significantly reduced, effectively preventing the fireproof blades after rotation from shifting, leaking, or even structurally damaged by the high-pressure shock wave, thus ensuring the sealing performance of the blades. The high-pressure shock wave airflow diverted into the flow channel within the shock relief box is then further diverted by the flow channel, further dispersing the energy of the shock wave and reducing its impact intensity. Afterward, the high-pressure shock wave airflow in the flow channel... During the flow process within the bellows, the airflow continuously enters the arc-shaped diversion channels within the bellows box for diversion. Simultaneously, the diverted high-pressure shock wave airflow counteracts each other through the counter-current chambers at the ends of each arc-shaped diversion channel. The interaction force between the airflows offsets part of the impact energy, achieving counter-current depressurization. This process of diversion and counter-current depressurization is repeated continuously. Through continuous diversion and counter-current depressurization, the impact force of the high-pressure shock wave airflow is gradually reduced, and the energy of the shock wave is gradually dissipated. Finally, after multiple diversions and counter-current depressurizations, the high-pressure shock wave airflow enters the pressure relief chamber within the bellows box. A final depressurization process is performed to restore the airflow pressure to a safe range. Afterward, the depressurized airflow in the depressurization chamber is diverted into the discharge duct at the end of the shock absorber box. During its discharge, the airflow undergoes multiple diversions and pressure reductions through various orifices on the inclined plate within the discharge duct, further dissipating any remaining impact energy. Finally, it forces its way through the one-way magnetic seal at the end of the shock absorber box and smoothly discharges to the outside. This completes the multi-stage shock venting process for dealing with high-pressure instantaneous shock waves generated by deflagration or explosion, comprehensively protecting the fire damper and its blade structure from impact damage.

[0015] This invention provides a high-temperature and corrosion-resistant fire damper. It has the following beneficial effects: 1. By adding and setting a fitting and sealing mechanism, this invention enables the fire damper to achieve the following during use: On the one hand, during daily ventilation, the magnetic strip seat 1 and magnetic strip seat 2 on adjacent fire damper blades can effectively buffer the continuous vibration caused by airflow through magnetic attraction, preventing the blades from deforming or warping due to long-term vibration and ensuring the flatness of the blade structure. On the other hand, when the blades close during a fire, the V-shaped seat and the insertion groove cooperate to achieve initial support and fitting. Combined with the magnetic attraction of the overlapping side groove and the deformation filling of the silicone sealing gasket, it can not only eliminate the gaps after the blades are closed, but also strengthen the sealing tightness, prevent smoke leakage, take into account both daily deformation prevention and fire sealing reliability, and comprehensively improve the performance of the fire damper. 2. By adding and setting a blade protection mechanism, this invention can increase the heat dissipation area of ​​the fireproof blade during the use of the fireproof valve. In addition, the concave grooves on the fireproof blade can quickly conduct and dissipate heat in conjunction with the ceramic strips. It can also buffer the deformation caused by thermal expansion and contraction. Secondly, the symmetrically set concave grooves can make the blade expand evenly when heated, avoiding unilateral heat accumulation and warping caused by one side. At the same time, the cross-shaped reinforcing ribs can improve the bending and warping stiffness of the blade. The hollow heat insulation cavity forms an air heat insulation layer to block heat conduction. It can not only achieve dual heat dissipation and cooling inside and outside, but also enhance the structural strength of the blade. It protects the blade from multiple dimensions such as heat dissipation, deformation resistance and heat insulation, and avoids structural damage caused by high temperature baking. 3. By adding and setting a rigid limiting mechanism, during the use of the fire damper, after a fire occurs, the fireproof blade closes in place, and the limiting rod is automatically inserted into the limiting hole under gravity. This not only rigidly fixes the closed blade to prevent displacement or loosening, but also resists the impact airflow generated by deflagration, avoiding deformation or damage to the blade and ensuring that the blade always maintains a stable closed state. At the same time, the limiting mechanism moves synchronously with the blade, requiring no additional drive control. The structure is simple and the operation is reliable, effectively improving the stability of the fire damper's closure during a fire and strengthening the safety guarantee of fire prevention and smoke isolation. 4. By adding and setting up a multi-stage wave-relief mechanism, this invention addresses the high-pressure shock wave generated by deflagration during the use of the fire damper. First, it achieves initial diversion through a one-way magnetic sealing cover and opening, reducing the impact intensity directly acting on the blades. Second, it gradually diverts and counteracts the energy through the flow channel, arc-shaped diversion channel, and counter-current chamber. Finally, it completes the final pressure reduction through the pressure relief chamber and discharge channel. This not only gradually weakens the impact force of the shock wave but also prevents blade displacement and seal leakage due to the impact. It can even protect the overall structure of the valve body from damage. The passive wave relief does not require electric drive, is sensitive and reliable, and greatly improves the fire damper's resistance to deflagration impact. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front structure of the present invention; Figure 2 This is a schematic diagram of the rear structure of the present invention; Figure 3 This is a schematic diagram of one side of the fireproof blade structure of the present invention; Figure 4 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A; Figure 5 This is a schematic diagram of the other side of the fireproof blade of the present invention; Figure 6 This is a partial planar schematic diagram of the V-shaped seat structure of the present invention; Figure 7 This is a cross-sectional schematic diagram of the internal structure of the fireproof blade of the present invention; Figure 8 This is a partial structural diagram of the shock absorber box of the present invention; Figure 9 This is a cross-sectional view of the internal structure of the soundproof box of the present invention.

[0017] The components are as follows: 1. Valve body shell; 2. Fireproof blade; 3. Opening; 4. Limiting hole; 5. Flushing box; 6. Control box; 7. Thermistor alloy sheet; 8. Limiting side seat; 9. Cross reinforcing rib; 10. One-way magnetic sealing cover; 11. Connecting seat; 12. Concave groove; 13. Overlapping side groove; 14. V-shaped seat; 15. Magnetic strip seat; 16. Insertion groove; 17. Ceramic strip; 18. Magnetic strip seat; 19. Limiting rod; 20. Mounting seat; 21. Silicone connecting piece; 22. Strip seat; 23. Heat insulation cavity; 24. Magnetic ring seat; 25. One-way magnetic sealing cover; 26. Flow channel; 27. Arc-shaped diversion channel; 28. Counterflow cavity; 29. ​​Pressure relief cavity; 30. Inclined plate; 31. Discharge channel; 32. Diversion hole. Detailed Implementation

[0018] The technical solutions in 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see the appendix Figure 1 - Appendix Figure 2 This invention provides a high-temperature and corrosion-resistant fireproof valve, including a valve body shell 1. The valve body shell 1 has multiple fireproof blades 2 that seal the air duct inside. A wave-relief box 5 is provided at the bottom of the valve body shell 1. A thermosensitive alloy sheet 7 is provided at the top center of the inner wall of the valve body shell 1 to sense the air duct temperature and trigger the valve opening and closing. A control box 6 is provided at the top center of the valve body shell 1 to receive the melting signal of the thermosensitive alloy sheet 7 and control the fireproof blades 2 to automatically close. Please see the appendix Figure 3 and attached Figure 5 - Appendix Figure 6 The sealing mechanism is installed on the fireproof blade 2 and is used to ensure the fit and sealing effect between multiple fireproof blades 2 when they are closed. The sealing mechanism includes overlapping grooves 13. Overlapping grooves 13 are provided on both sides of the fireproof blade 2, and the two overlapping grooves 13 on each fireproof blade 2 are arranged diagonally. The surface of the overlapping grooves 13 is provided with silicone sealing gaskets. A magnetic strip seat 15 is provided in the middle of one overlapping groove 13, and a magnetic strip seat 28 is provided near the edge of the other overlapping groove 13. When the fireproof blade 2 is in the open state, the magnetic strip seat 15 and the magnetic strip seat 28 on the two adjacent fireproof blades 2 are attracted by the magnetic attraction between them to ensure the stability of the fireproof blade 2 when passing through the airflow.

[0020] When the sealing mechanism is activated, under safe operation or normal ventilation conditions, the airflow flowing through the ventilation duct passes through the gap of the fireproof blades 2 inside the valve body shell 1, continuously vibrating the fireproof blades 2 in the open state. Long-term vibration can easily cause deformation of the blades. At this time, a stable magnetic attraction is generated between the magnetic strip seat 15 at the front end and the magnetic strip seat 18 at the rear end of the adjacent fireproof blades 2. This attraction can buffer the vibration impact of the airflow on the fireproof blades 2 to the maximum extent and reduce the vibration amplitude. At the same time, the magnetic attraction between two adjacent fireproof blades 2 can also keep the airflow stable and avoid the airflow turbulence from aggravating the vibration. This effectively prevents the fireproof blades 2 from deforming or warping due to continuous vibration during long-term opening, and ensures the structural integrity of the blades.

[0021] The sealing mechanism also includes a strip seat 22. A strip seat 22 is fixedly connected to the middle of one side of the magnetic strip seat 15. A deformable V-shaped seat 14 is provided on the end of the strip seat 22 away from the fireproof blade 2. Silicone connecting pieces 21 are provided on both sides of the inner wall of the V-shaped seat 14. The ends of the silicone connecting pieces 21 away from the V-shaped seat 14 are connected to the corresponding positions on both sides of the strip seat 22. An insertion groove 16 matching the strip seat 22 is opened in the middle of the overlapping side groove 13 away from the V-shaped seat 14. Limiting side seats 8 are staggered on both sides of the inner wall of the valve body shell 1.

[0022] In the event of a fire, the fireproof blade 2 inside the valve body shell 1 begins to rotate and close under the drive of the control box 6. During the rotation and closing process of the fireproof blade 2, the strip seat 22 and the V-shaped seat 14 in the overlapping groove 13 on the fireproof blade 2 will be precisely aligned with the insertion groove 16 on the adjacent fireproof blade 2 and gradually enter it. During the insertion process, the V-shaped seat 14 undergoes elastic deformation due to the squeezing action of the inner wall of the insertion groove 16, thus smoothly passing through the insertion groove 16. When the V-shaped seat 14 is fully inserted and passes through the insertion groove 16, the squeezing pressure it is subjected to disappears instantly. The V-shaped seat 14 recovers to its original V-shaped structure due to its own elasticity. The two ends of the reset V-shaped structure will tightly abut against the inner wall of the insertion groove 16 of the adjacent fireproof blade 2, forming a reverse support and fixation, thereby completing the initial fitting treatment when the fireproof blade 2 is closed, ensuring the basic sealing of the blade closure.

[0023] Furthermore, after the fireproof blade 2 rotates and closes, the overlapping grooves 13 at the edge of the fireproof blade 2 will overlap and fit together. At the same time as the overlapping grooves 13 overlap, the magnetic strip seat 15 and magnetic strip seat 18 on them will also move closer to each other through magnetic adsorption. During the magnetic adsorption process, the overlapping edge parts on the fireproof blade 2 will be continuously pulled closer to each other. As the edges move closer, they will squeeze the silicone sealing gasket on them, causing the silicone sealing gasket to undergo elastic deformation. The deformed silicone sealing gasket can fully fill the tiny gaps left between the fireproof blades 2, achieving all-round sealing and blocking. This completes the re-fitting and sealing treatment when the fireproof blade 2 is closed, further improving the sealing performance and preventing smoke leakage.

[0024] Please see the appendix Figure 3 Appendix Figure 5 and attached Figure 7 The blade protection mechanism is installed on the fireproof blade 2 and is used to protect the fireproof blade 2 during use. The blade protection mechanism includes concave grooves 12. Multiple sets of concave grooves 12 are equally spaced on both sides of the fireproof blade 2. The multiple sets of concave grooves 12 are symmetrically arranged on both sides of the fireproof blade 2. The bottom of the inner side of the concave grooves 12 is filled with ceramic strips 17. Multiple cross reinforcing ribs 9 are fixedly connected at equal intervals on both sides of the fireproof blade 2. The interior of the fireproof blade 2 is provided with heat insulation cavity 23.

[0025] When the blade protection mechanism is activated, the high temperature environment inside the ventilation duct will continuously bake the fireproof blade 2 for a long time during normal airflow, which can easily cause the blade to deform and warp due to heat. At this time, the multiple sets of concave grooves 12 opened on the fireproof blade 2 can effectively increase the heat dissipation area of ​​the blade surface and accelerate the heat exchange between the blade and the airflow, thereby significantly improving the overall heat dissipation capacity of the fireproof blade 2 during airflow and reducing the overall temperature rise of the blade.

[0026] Meanwhile, the ceramic strip 17 added in the concave groove 12 not only has excellent thermal conductivity, which can quickly conduct and dissipate the heat accumulated on the fireproof blade 2, but also uses its own elastic properties to buffer the deformation generated by the blade during thermal expansion and contraction, help suppress the warping deformation of the blade, and further ensure the structural stability of the blade. At the same time, due to the corrosion resistance of ceramic itself, the ceramic strip 17 can also improve the overall corrosion resistance of the fireproof blade 2 during use.

[0027] Furthermore, the concave grooves 12 on the surface of the fireproof blade 2 are symmetrically arranged on the left and right and up and down. The core purpose of this arrangement is to ensure that the thermal expansion rate of each part of the blade remains uniform when it is baked at high temperature, effectively avoiding the problem of unidirectional warping caused by heat accumulation on one side and uneven thermal expansion, and ensuring that the blade can remain flat under long-term high temperature environment, providing a reliable guarantee for subsequent closure and sealing.

[0028] Meanwhile, the multiple sets of cross-shaped reinforcing ribs 9 on the fireproof blade 2 ensure that the overall blade retains the heat dissipation capacity of the concave groove 12 while significantly improving the blade's bending and warping stiffness and structural strength. This effectively counteracts the deformation force generated by the blade under high temperature conditions, preventing the blade from bending or warping. Furthermore, the internal heat insulation cavity 23 of the fireproof blade 2 creates a hollow structure of double-layered metal plates. When the blade is continuously subjected to heat flow impact, the heat insulation cavity 23 forms a stable air insulation layer, effectively blocking the conduction of high-temperature heat to the interior of the blade. This, combined with the concave groove 12 on the surface of the fireproof blade 2, achieves a dual heat dissipation effect, significantly reducing the degree of heat exposure of the blade and minimizing damage caused by high temperatures. This provides comprehensive protection for the fireproof blade 2 during use.

[0029] Please see the appendix Figure 1 and attached Figure 4 A rigid limiting mechanism is installed inside the valve body shell 1 to rigidly limit the fireproof blade 2 that is sealed inside when the fire damper is closed. The rigid limiting mechanism includes limiting holes 4. Multiple sets of limiting holes 4 are equidistantly opened at the bottom of the inner wall of the valve body shell 1. Multiple mounting seats 20 are fixedly connected at equal intervals on the bottom of both sides of the outer wall of the fireproof blade 2. Limiting rods 19 are slidably connected to the middle of the inner side of each mounting seat 20. The limiting rods 19 and the limiting holes 4 are matched.

[0030] When the rigid limiting mechanism is activated, the fire damper on the ventilation duct is successfully activated after a fire occurs. The fireproof blade 2 inside the valve body shell 1 begins to rotate and gradually completes the closing action. During the rotation of the fireproof blade 2, the mounting base 20 and the limiting rod 19 on it will rotate synchronously to ensure that the limiting component and the blade action are synchronized.

[0031] When the fireproof blade 2 is fully rotated and closed, the mounting seat 20 on the fireproof blade 2 moves exactly above the upper limit hole 4 of the valve body shell 1. At this time, the bottom of the limiting rod 19 on the mounting seat 20 is no longer constrained by the top support force of the inner wall of the valve body. Under its own weight, the limiting rod 19 slides down the mounting seat 20 and smoothly inserts into the limiting hole 4 inside the valve body shell 1. Through the cooperation of the limiting rod 19 and the limiting hole 4, the front and rear sides of the fireproof blade 2 after rotation and closure are firmly limited, effectively preventing the fireproof blade 2 from being displaced, loosened or even damaged when subjected to the impact airflow of deflagration, explosion or other impacts, ensuring that the blade always remains in a closed state, thus completing the rigid limiting treatment of the fireproof blade 2 after closure.

[0032] Please see the appendix Figure 8 - Appendix Figure 9 The multi-stage wave-relief mechanism, located inside the wave-relief box 5, is used to perform multiple pressure relief and buffering treatments on the shock wave airflow generated by deflagration and explosion in the air duct.

[0033] The multi-stage bleed-out mechanism includes flow channels 26. Flow channels 26 are provided on both sides of the inside of the bleed-out box 5 near the valve body shell 1. Two openings 3 are provided on the bottom side of the inner wall of the valve body shell 1, and the bottom of the openings 3 are connected to the inside of the corresponding flow channels 26. Magnetic ring seats 24 are fixedly connected to the inner wall of the flow channels 26 near the openings 3. The bottom of the magnetic ring seats 24 is provided with a one-way magnetic sealing cover 25 that can be opened by the impact of high-pressure airflow. Multiple connecting seats 11 are fixedly connected at equal intervals on the top of both sides of the outer wall of the bleed-out box 5.

[0034] When the multi-stage shock venting mechanism is activated, the instantaneous high-pressure shock wave generated by the explosion and deflagration in the ventilation duct rapidly propagates to the valve body shell 1. The pressure in the duct rises sharply. When the pressure exceeds the withstand limit of the one-way magnetic sealing cover 25 at the bottom of the magnetic ring seat 24, the one-way magnetic sealing cover 25 at the bottom of the magnetic ring seat 24 will be opened by the instantaneous high-pressure shock wave. At this time, part of the instantaneous high-pressure shock wave in the ventilation duct will be diverted through the opening 3 in the valve body shell 1. The diverted instantaneous high-pressure shock wave smoothly enters the flow channel 26 in the shock venting box 5 through the opening 3.

[0035] At the same time, as some of the shock waves are diverted, the impact intensity directly acting on the fireproof blade 2 inside the valve body shell 1 is greatly reduced, effectively preventing the fireproof blade 2 after rotation and sealing from being impacted by high-pressure shock waves, causing displacement, sealing leakage, or even structural damage, thus ensuring the sealing performance of the blade.

[0036] The multi-stage wave-damping mechanism also includes counter-damping cavities 28. Multiple counter-damping cavities 28 are equidistantly provided in the inner middle of the wave-damping box 5. The multiple counter-damping cavities 28 are connected by multiple sets of arc-shaped diversion channels 27, and the first arc-shaped diversion channels 27 are respectively connected to the interior of the corresponding flow channels 26.

[0037] The high-pressure shock wave airflow, which is then diverted into the flow channel 26 inside the baffle box 5, will be further diverted by the flow channel 26 to disperse the energy of the shock wave and reduce its impact intensity. Subsequently, as the high-pressure shock wave airflow in the flow channel 26 flows inside the baffle box 5, it will continuously enter the arc-shaped diversion channel 27 inside the baffle box 5 for diversion. At the same time, the diverted high-pressure shock wave airflow will collide with each other through the counter-collision chamber 28 at the end of each arc-shaped diversion channel 27, using the interaction force between the airflows to offset part of the impact energy and achieve counter-collision pressure reduction. This process of diversion and counter-collision pressure reduction is repeated, and the impact force of the high-pressure shock wave airflow is gradually reduced in the process of continuous diversion and counter-collision pressure reduction, thus gradually dissipating the energy of the shock wave.

[0038] The multi-stage bleed relief mechanism also includes a pressure relief chamber 29. The pressure relief chamber 29 is provided on the side of the bleed relief box 5 away from the flow channel 26. The arc-shaped diversion channel 27 at the end is connected to the interior of the pressure relief chamber 29. Multiple discharge channels 31 are equally spaced on the side of the bleed relief box 5 away from the flow channel 26, and one end of each discharge channel 31 is connected to the interior of the pressure relief chamber 29. Multiple inclined plates 30 are fixedly connected at equal intervals inside each discharge channel 31. Multiple diversion holes 32 are equally spaced on each inclined plate 30. Multiple unidirectional magnetic sealing covers 10 are equally spaced on the end of the bleed relief box 5 away from the valve body shell 1.

[0039] After multiple diversions and counter-pressure reductions, the high-pressure shock wave airflow enters the pressure relief chamber 29 inside the bleeder box 5 for a final pressure relief process, restoring the airflow pressure to a safe range. Subsequently, the pressure-relieved airflow in the pressure relief chamber 29 is diverted into the discharge channel 31 at the end of the bleeder box 5. During the airflow's discharge process in the discharge channel 31, it undergoes multiple diversions and pressure reductions through multiple diversion holes 32 on the inclined plate 30 within the discharge channel 31, further dissipating the remaining impact energy. Finally, it breaks through the one-way magnetic sealing cover 10 at the end of the bleeder box 5 and is smoothly discharged to the outside. This completes the multi-stage shock wave relief process when facing the high-pressure instantaneous shock wave generated by deflagration and explosion, comprehensively protecting the fire damper and blade structure from impact damage.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature and corrosion-resistant fire damper, characterized in that, include, Valve body shell (1), the inside of the valve body shell (1) is provided with multiple fireproof blades (2) to seal the air duct, and the bottom of the valve body shell (1) is provided with a wave-relief box (5). A thermosensitive alloy sheet (7) for sensing the temperature of the air duct and triggering the valve switch is provided at the top center of the inner wall of the valve body shell (1). A control box (6) for receiving the melting signal of the thermosensitive alloy sheet (7) and controlling the fireproof blade (2) to automatically close is provided at the top center of the valve body shell (1). The fitting and sealing mechanism is set on the fireproof blade (2) to ensure the fitting and sealing effect between multiple fireproof blades (2) when they are closed. The blade protection mechanism is installed on the fireproof blade (2) and is used to protect the fireproof blade (2) during use. A rigid limiting mechanism is installed inside the valve body shell (1) to rigidly limit the fireproof blades (2) that are sealed inside when the fireproof valve is closed. The multi-stage wave-relief mechanism is installed in the wave-relief box (5) and is used to perform multiple pressure relief and buffering treatments on the shock wave airflow generated by deflagration and explosion in the air duct.

2. The high-temperature and corrosion-resistant fire damper according to claim 1, characterized in that, The fitting and sealing mechanism includes overlapping side grooves (13). Overlapping side grooves (13) are provided on both sides of the fireproof blade (2), and the two overlapping side grooves (13) on each fireproof blade (2) are arranged diagonally. The surface of each overlapping side groove (13) is provided with a silicone sealing gasket. A magnetic strip seat one (15) is provided in the middle of one of the overlapping side grooves (13), and a magnetic strip seat two (18) is provided near the edge of the other overlapping side groove (13). When the fireproof blade (2) is in the open state, the magnetic strip seat one (15) and the magnetic strip seat two (18) on two adjacent fireproof blades (2) are attracted by the magnetic attraction generated by the two, which ensures the stability of the entire fireproof blade (2) when passing through the airflow.

3. The high-temperature and corrosion-resistant fire damper according to claim 2, characterized in that, The fitting and sealing mechanism also includes a strip seat (22). A strip seat (22) is fixedly connected to the middle of one side of the magnetic strip seat (15). A V-shaped seat (14) that can be deformed is provided on the end of the strip seat (22) away from the fireproof blade (2). A silicone connecting piece (21) is provided on both sides of the inner wall of the V-shaped seat (14). The end of the silicone connecting piece (21) away from the V-shaped seat (14) is connected to the corresponding position on both sides of the strip seat (22). An insertion groove (16) matching the strip seat (22) is opened in the middle of the overlapping side groove (13) away from the V-shaped seat (14). Limiting side seats (8) are staggered on both sides of the inner wall of the valve body shell (1).

4. A high-temperature and corrosion-resistant fire damper according to claim 1, characterized in that, The blade protection mechanism includes a concave groove (12). Multiple sets of concave grooves (12) are equidistantly provided on the middle of both sides of the fireproof blade (2). The multiple sets of concave grooves (12) are symmetrically arranged on both sides of the fireproof blade (2) in the left and right and up and down directions. The bottom of the inner side of the concave groove (12) is filled with ceramic strips (17). Multiple cross reinforcing ribs (9) are fixedly connected at equal intervals on both sides of the fireproof blade (2). The interior of the fireproof blade (2) is provided with a heat insulation cavity (23).

5. A high-temperature and corrosion-resistant fire damper according to claim 1, characterized in that, The rigid limiting mechanism includes limiting holes (4). Multiple sets of limiting holes (4) are equidistantly opened at the bottom of the inner wall of the valve body shell (1). Multiple mounting seats (20) are fixedly connected at equal intervals on both sides of the bottom of the outer wall of the fireproof blade (2). Limiting rods (19) are slidably connected to the middle of the inner side of each mounting seat (20). The limiting rods (19) and the limiting holes (4) are matched.

6. A high-temperature and corrosion-resistant fire damper according to claim 1, characterized in that, The multi-stage wave-damping mechanism includes flow channels (26). The wave-damping box (5) has flow channels (26) on both sides of the interior near the valve body shell (1). Two openings (3) are opened on the bottom side of the inner wall of the valve body shell (1), and the bottom of the openings (3) is connected to the interior of the corresponding flow channels (26). Magnetic ring seats (24) are fixedly connected to the inner wall of the flow channels (26) near the openings (3). The bottom of the magnetic ring seats (24) is provided with a one-way magnetic sealing cover (25) that can be opened by the impact of high-pressure airflow. Multiple connecting seats (11) are fixedly connected at equal intervals on the top of both sides of the outer wall of the wave-damping box (5).

7. A high-temperature and corrosion-resistant fire damper according to claim 6, characterized in that, The multi-stage wave-damping mechanism also includes a counter-flow chamber (28). Multiple counter-flow chambers (28) are equidistantly provided in the inner middle of the wave-damping box (5). The multiple counter-flow chambers (28) are connected by multiple sets of arc-shaped diversion channels (27), and the first arc-shaped diversion channel (27) is connected to the interior of the corresponding flow channel (26).

8. A high-temperature and corrosion-resistant fire damper according to claim 7, characterized in that, The multi-stage wave-relief mechanism also includes a pressure relief chamber (29). The pressure relief chamber (29) is provided on the side of the wave-relief box (5) away from the flow channel (26). The arc-shaped diversion channel (27) at the end is connected to the interior of the pressure relief chamber (29). Multiple discharge channels (31) are equidistantly opened on the side of the wave-relief box (5) away from the flow channel (26). One end of each discharge channel (31) is connected to the interior of the pressure relief chamber (29). Multiple inclined plates (30) are fixedly connected at equal intervals inside each discharge channel (31). Multiple diversion holes (32) are equidistantly opened on each inclined plate (30). Multiple unidirectional magnetic sealing covers (10) are equidistantly arranged on the end of the wave-relief box (5) away from the valve body shell (1).

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