A quick-release drawer-type fire damper

Abstract

The application discloses a quick-release drawer type fire arrester, and relates to the technical field of fire arresters. The fire arrester comprises a shell, a fire arrester core arranged in the shell, a brake ring arranged on the inner wall of the shell, a sealing ring arranged on the inner wall of the brake ring, a guide assembly arranged on the outer part of the fire arrester core, a flow guide cone arranged at one end of the fire arrester core, a cover plate assembly arranged on one side of the shell, and a locking assembly arranged on the outer wall of the shell. The locking assembly, the guide assembly and the cover plate assembly are cooperatively matched, so that the fire arrester core can be quickly disassembled and stably fixed. The locking assembly applies rigid mechanical pre-tightening force to the outer wall of the shell, the locking force is converted into axial and radial composite compression force on the fire arrester core through the inclined surface structure of the guide assembly while eliminating the horizontal loosening of the guide assembly caused by high-frequency vibration, and the fire arrester core is stably constrained in the shell. When maintenance is needed, the cover plate assembly and the shell can be quickly separated by unlocking the locking assembly, and the fire arrester core can be taken out from the inside.

Description

Technical Field

[0001] This invention relates to the field of flame arrester technology, and in particular to a flame arrester with a quick-release drawer type. Background Technology

[0002] A quick-release drawer-type flame arrester is a safety device installed on pipelines containing flammable gases or liquids to prevent flames from passing through and to prevent backfire and explosion. Inside its housing is a drawer-type flame arrestor core assembly (usually composed of multiple layers of corrugated metal strips or metal mesh) that can be pulled outwards along a sliding rail. The core divides the flame into small streams through its own gaps and accelerates heat dissipation to extinguish the flame.

[0003] Existing flame arresters are mostly secured with multiple bolts. Each time the flame arrester disc is replaced, maintenance personnel must spend a considerable amount of time in high-risk oil and gas areas, tightening and loosening each bolt individually. Because the flame arrester is exposed to the elements or in environments with high humidity and temperature differences, the bolt pairs are highly susceptible to severe electrochemical corrosion. Furthermore, in the event of a detonation within the pipeline, the instantaneous temperature can soar to 1500-2000℃, and the pressure can surge to tens of megapascals. Under extreme thermal shock, the axial elongation of the bolts and the housing due to the difference in their coefficients of thermal expansion far exceeds the rebound compensation of the gasket. The gasket loses its compression ratio within microseconds, causing the sealing surface to separate instantly, forming a microscopic gap visible to the naked eye. Summary of the Invention

[0004] To address the issues of low maintenance efficiency and easy seal failure under deflagration conditions, this invention provides a quick-release drawer-type flame arrester.

[0005] The present invention provides a quick-release drawer-type flame arrester, which adopts the following technical solution: A quick-release drawer-type flame arrester includes a housing. Inside the housing is a flame-arresting core for fireproofing. The inner wall of the housing has a brake ring for providing rigid support. The inner wall of the brake ring has a sealing ring for multi-layer protection. The sealing ring is made of flexible graphite material that undergoes plastic creep upon heating. Outside the flame-arresting core is a guide assembly for horizontal guidance. One end of the flame-arresting core has a guide cone for airflow guidance. One side of the housing has a cover plate assembly for internal closure. The outer wall of the housing has a locking assembly for rigid clamping. One end opening of the housing is closed by the cover plate assembly. The locking assembly is installed on the outer wall of the housing and cooperates with the cover plate assembly, applying an inward locking force to the cover plate assembly. The brake ring is a bimetallic composite structure ring. The linear thermal expansion coefficient of the outer layer of the brake ring is lower than that of the inner layer. When the brake ring is heated, the inner layer expands inward due to the radial constraint of the outer layer and the shell. The inner layer of the brake ring squeezes the sealing ring, causing the sealing ring to squeeze inward and fill the gap in the shell.

[0006] By employing the above technical solution, the locking assembly applies a rigid mechanical preload to the outer wall of the housing, thereby eliminating the horizontal loosening of the guide assembly caused by high-frequency vibration of the housing. Simultaneously, the locking assembly rigidly locks the cover plate assembly, ensuring the flame arrestor core is stably installed inside the housing. The guide assembly applies a combined axial and radial clamping force to the flame arrestor core via an inclined surface, further securing the flame arrestor core. During disassembly and maintenance, the cover plate assembly and housing are quickly separated by unlocking the locking assembly, allowing the flame arrestor core to be removed from the inside.

[0007] When an internal explosion occurs, the high temperature of the explosion prevents the rigid mechanical preload generated by the locking structure on the outer layer of the brake ring from expanding outward, thus acting only on the internal sealing ring. The sealing ring undergoes plastic creep under high pressure, filling any tiny gaps that may have been caused by the explosion shock wave, patching the gaps created by the explosion, and improving the seal against high-temperature-induced failure. The high-speed airflow along the central axis is smoothly split and guided by the guide cone into the surrounding annular flame arrestor core pores. This not only eliminates airflow stagnation points at the front end and reduces resistance, but also disperses the devastating peak pressure of the explosion wave to the surrounding inner walls at the moment of explosion, protecting the central vulnerable component from collapse.

[0008] Preferably, the inner wall of the housing is fitted to the outer wall of the brake ring, the inner wall of the brake ring is fitted to the outer wall of the sealing ring, and one end of the flame arrestor core is fixedly connected to the horizontal plane of the guide cone.

[0009] By adopting the above technical solution, the housing protects the brake ring, the brake ring surrounds the sealing ring, and the flame arrestor core and the guide cone move synchronously and horizontally.

[0010] Preferably, a gasket is fixedly connected to one end of the housing, a chamber is fixedly connected to the inner wall of the sealing ring, a sliding piece is slidably connected to the inner wall of the gasket, a frame is fixedly connected to the side of the sliding piece, a positioning piece is fixedly connected to the end of the frame away from the sliding piece, a connecting plate is fixedly connected to the other end of the housing, and a first connecting member is fixedly connected to the side of the connecting plate away from the housing.

[0011] By adopting the above technical solution, the gasket and connecting plate close the housing, the gasket limits the sliding plate, the sliding plate drives the frame to move horizontally, the frame drives the positioning plate to move horizontally, and the first connecting piece connects to the pipe at one end.

[0012] Preferably, the guide assembly includes a slide rail fixedly connected to the inner wall of the cabin, an inclined member fixedly connected inside the slide rail, a guide hole symmetrically opened on the outer wall of the positioning piece, the slide rail and the inclined member horizontally passing through the guide hole 1 and slidably connected to the positioning piece, a guide hole symmetrically opened on the outer wall of the sliding piece, the slide rail and the inclined member horizontally passing through the guide hole 2 and slidably connected to the sliding piece, the inner wall of the frame is detachably connected to the outer wall of the flame arrestor core, and the side wall of the positioning piece is slidably connected to the inner wall of the cabin.

[0013] By adopting the above technical solution, the cabin fixes the slide rail, the slide rail uses an inclined component to horizontally limit the positioning piece, and the inclined component fixes the positioning piece when it moves to the end of the inclined component.

[0014] Preferably, the cover plate assembly includes a cover plate member that fits against the side wall of the gasket, a second connector is fixedly connected to the side of the cover plate member away from the gasket, and a plug-in piece is fixedly connected to the side wall of the cover plate member, with a positioning groove formed on the side wall of the plug-in piece.

[0015] By adopting the above technical solution, the cover plate closes the gasket, the second connector connects to the other end of the pipe, the cover plate drives the plug-in piece to slide and limit its movement, and the positioning groove is used to limit the installation of the plug-in piece.

[0016] Preferably, the cover plate fits the side of the sliding piece away from the frame, and the plug-in pieces are symmetrically located on both sides of the cover plate.

[0017] By adopting the above technical solution, the cover plate seals the sliding piece, and the plug-in piece further fixes the cover plate.

[0018] Preferably, the locking assembly includes a side support fixedly connected to the outer wall of the housing, a limiting member fixedly connected to the outer wall of the side support, a fixed shaft movably passing through the top of the limiting member, a cam fixedly passing through the outer wall of the fixed shaft, a cylinder fixedly passing through the outer wall of the fixed shaft, a rotating rod fixedly connected to the outer wall of the cylinder, and a self-locking assembly for fixing the rotating rod on the side wall of the rotating rod.

[0019] By adopting the above technical solution, the housing fixes the side support, the side support fixes the limiting member, the limiting member limits the fixed shaft, the fixed shaft drives the cam and the cylinder to be synchronously limited, the rotating rod drives the cylinder to rotate, and the rotating rod is fixed by the self-locking assembly.

[0020] Preferably, the insert piece is located between two limiting members, the cam presses against the positioning groove, and both the upper and lower ends of the cylinder are fixedly connected to the cam.

[0021] By adopting the above technical solution, the limiting component vertically limits the insertion piece, the cam fixes the positioning groove, and the cam drives the cylinder to rotate.

[0022] Preferably, the self-locking assembly includes a transverse plate fixedly connected to the side wall of the rotating rod, a pin slidably connected to the side wall of the transverse plate, a puller fixedly connected to the end of the pin, a fixing ring fixedly passing through the outer wall of the pin, a compression spring sleeved on the outer wall of the pin, and a fixing plate fixedly connected to the side wall of the side support.

[0023] By adopting the above technical solution, the rotating rod rotates synchronously with the horizontal plate, the horizontal plate drives the pin to slide synchronously, the pulling member drives the pin to slide horizontally, the fixing ring drives the pin to slide horizontally, the compression spring pushes the fixing ring to move horizontally, and the side support member fixes the fixing plate.

[0024] Preferably, the side wall of the fixing plate and the pin pass through horizontally, one end of the compression spring is fixedly connected to the side wall of the fixing ring, and the other end of the compression spring is fixedly connected to the side wall of the transverse plate.

[0025] By adopting the above technical solution, the pin is inserted into the fixing plate to limit the rotation of the rotating rod. The horizontal movement of the fixing ring will cause the compression spring to be compressed, thereby limiting the horizontal movement of the pin by the compression spring.

[0026] In summary, the present invention has at least one of the following beneficial technical effects: 1. By utilizing the coordinated operation of the locking assembly, guide assembly, and cover plate assembly, the flame arrestor core can be quickly disassembled and securely fixed. The locking assembly applies a rigid mechanical pre-tightening force to the outer wall of the housing, which eliminates the horizontal loosening of the guide assembly caused by high-frequency vibration. At the same time, the inclined structure of the guide assembly converts the locking force into a combined axial and radial clamping force on the flame arrestor core, so that the flame arrestor core is stably constrained inside the housing. When disassembly and maintenance are required, the cover plate assembly can be quickly separated from the housing by simply unlocking the locking assembly, and the flame arrestor core can be taken out from the inside without disassembling the entire pipe or equipment, which significantly shortens the maintenance time. 2. By leveraging the coordinated operation of the locking assembly, brake ring, and sealing ring, an adaptive emergency sealing function is achieved for explosion conditions. During normal operation, the rigid mechanical preload provided by the locking assembly is mainly used to fix the flame arrestor core and prevent vibration-induced loosening. When an internal explosion occurs, the high temperature generated by the explosion causes the brake ring to expand due to heat. The rigid mechanical preload constrains the outward expansion path of the brake ring, forcing its expansion pressure to the internal sealing ring. Under high pressure, the sealing ring undergoes plastic creep, actively flowing into and filling any tiny gaps that may be caused by the explosion shock wave, thus forming an adaptive seal that "uses explosion to stop leakage." This process converts part of the destructive energy generated by the explosion itself into the main driving force for the emergency seal, realizing the automatic switching of the function from "normal fixing" to "actively filling after explosion." This effectively improves the problem of sealing failure caused by high temperature in traditional structures and significantly enhances the safety and reliability of the equipment under extreme conditions. 3. The high-speed airflow on the central axis is smoothly split and guided by the guide cone to the surrounding annular flame arrestor core pores. This not only eliminates the airflow stagnation point at the front end and reduces resistance, but also disperses the devastating peak pressure of the explosion wave to the surrounding inner wall at the moment of explosion, protecting the fragile central components from being crushed. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the overall structure of the present invention; Figure 2 This is a cross-sectional view of the internal structure of the present invention; Figure 3 This is an exploded view of the overall structure of the present invention; Figure 4 This is a cross-sectional view of the guide component of the present invention; Figure 5 This is a partial schematic diagram of the connecting disc of the present invention; Figure 6 This is a partial schematic diagram of the limiting member of the present invention; Figure 7 This is a partial schematic diagram of the transverse plate of the present invention; Figure 8 This is a partial schematic diagram of the cylindrical portion of the present invention.

[0028] Figure label: 1. Shell; 21. Gasket; 22. Cabin; 23. Sliding piece; 24. Frame; 25. Positioning piece; 26. Connecting plate; 27. First connector; 28. Cover plate; 29. ​​Second connector; 210. Insertion piece; 211. Positioning groove; 212. Side support; 213. Limiting component; 214. Fixed shaft; 215. Cam; 216. Cylinder; 217. Rotating rod; 218. Transverse plate; 219. Pin; 220. Pulling component; 221. Retaining ring; 222. Compression spring; 223. Fixed plate; 3. Flame arrestor core; 4. Braking ring; 5. Sealing ring; 61. Slide rail; 62. Inclined component; 7. Guide cone. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 - Figure 8 The present invention will be described in further detail below.

[0030] This invention discloses a quick-release drawer-type flame arrester.

[0031] Reference Figure 1 - Figure 3A quick-release drawer-type flame arrester includes a housing 1, inside which a flame-arresting core 3 is disposed. The flame-arresting core 3 is used to block flames. The flame-arresting core 3 is composed of an outer layer of erosion-resistant gravel mesh, a middle layer of corrugated strip flame-arresting disc, and an inner core microporous flame-arresting mesh, arranged sequentially from the outside to the inside. A braking ring 4 is disposed on the inner wall of the housing 1 to provide rigid support. A sealing ring 5 is disposed on the inner wall of the braking ring 4 for sealing and protection. The sealing ring 5 is made of flexible graphite material, which will undergo plasticity when heated. The flame arrestor core 3 has a guide cone 7 at one end for air guidance. The brake ring 4 is sleeved on the inner wall of the housing 1, and the sealing ring 5 is sleeved on the inner wall of the brake ring 4. One end of the flame arrestor core 3 is connected to the guide cone 7 by integral molding or bolt fixing. The flame arrestor core 3 is provided with a guide assembly on the outside for horizontal guidance. A cover plate assembly is provided on one side of the housing 1 for internal closure of the housing 1. A locking assembly is provided on the outer wall of the housing 1 for rigid clamping. Brake ring 4 is a composite structure ring, with an outer Invar layer and an inner austenitic stainless steel layer. Invar is a nickel-iron alloy with an extremely low coefficient of linear thermal expansion in the range of room temperature to several hundred degrees Celsius. The coefficient of linear thermal expansion of austenitic stainless steel is significantly higher than that of Invar. When an explosion occurs, the radial thermal expansion of the inner stainless steel layer is much greater than that of the outer Invar layer. Because the outer Invar layer is rigidly constrained by the shell 1 and the locking assembly, it cannot expand outward, generating a reaction force on the inner stainless steel layer. This forces the inner stainless steel layer to expand and deform only radially inward, thereby squeezing the sealing ring 5 located inside the brake ring 4.

[0032] During installation, the locking assembly applies a rigid mechanical preload to the outer wall of the housing 1 to eliminate the horizontal loosening of the guide assembly that may be caused by the high-frequency vibration of the housing 1. At the same time, the locking assembly rigidly locks the cover plate assembly. The cover plate assembly allows the flame arrestor core 3 to be stably installed inside the housing 1. The guide assembly applies a radial pressing force to the flame arrestor core 3 through the inclined surface, thereby further fixing the flame arrestor core 3. During disassembly and maintenance, the staff can quickly separate the cover plate assembly from the housing 1 by unlocking the locking assembly. Then, the staff can take out the flame arrestor core 3 from the inside for replacement and maintenance. When an internal explosion occurs, the high temperature of the explosion prevents the rigid mechanical preload generated by the locking structure on the outer layer of the brake ring 4 from expanding outward. Instead, it can only be applied to the inner sealing ring 5. The sealing ring 5 undergoes plastic creep under high pressure, filling the tiny gaps that may be caused by the explosion shock wave. This fills the gaps caused by the high temperature. The high-speed airflow is smoothly separated by the guide cone 7 and guided to the pores of the flame arrestor core 3 arranged in a ring around the perimeter, thereby reducing resistance. At the moment of the explosion, the guide cone 7 disperses the peak pressure of the explosion wave to the inner walls around the perimeter, preventing the central fragile element from being crushed.

[0033] Reference Figure 2 , Figure 3 One end of the housing 1 is fixedly connected to a gasket 21 by bolts or welding. The inner wall of the sealing ring 5 is fixedly connected to a chamber 22. The inner wall of the gasket 21 is horizontally slidably connected to a sliding piece 23. The inner wall of the gasket 21 is in contact with the outer wall of the sliding piece 23. The side of the sliding piece 23 is fixedly connected to a frame 24 by welding or integral molding. The frame 24 is cylindrical in shape. The end of the frame 24 away from the sliding piece 23 is fixedly connected to a positioning piece 25 by integral molding or welding. The other end of the housing 1 is fixedly connected to a connecting plate 26 by bolts or welding. The side of the connecting plate 26 away from the housing 1 is fixedly connected to a first connecting piece 27 by welding or integral molding.

[0034] During factory assembly, the assembler first places the sealing ring 5 on the outer wall of the cabin 22, then places the brake ring 4 on the outer wall of the sealing ring 5, and then places the housing 1 on the outer wall of the brake ring 4, ensuring that the end faces of the brake ring 4, sealing ring 5, and housing 1 are flush. Next, the guide assembly is symmetrically installed on the inner wall of the cabin 22. Then, the assembler fixes the gasket 21 against the side wall of the cabin 22, then fixes the connecting plate 26 against the end of the cabin 22 away from the gasket 21, and finally fixes the first connecting piece 27 to the connecting plate 26, thus completing this part of the assembly.

[0035] Subsequently, when the flame arrestor core 3 needs to be horizontally pushed in for installation, the staff aligns the side wall of the positioning plate 25 with the inner wall of the cabin 22, and then pushes the positioning plate 25 horizontally. The positioning plate 25 slides horizontally into the cabin 22, and the positioning plate 25 drives the frame 24 and the sliding plate 23 to move horizontally in sync, thereby driving the flame arrestor core 3 inside the frame 24 to move horizontally, pushing the pre-installed flame arrestor core 3 and the guide cone 7 into the cabin 22 as a whole. When the side wall of the sliding plate 23 is flush with the side wall of the gasket 21, the flame arrestor core 3 is installed in place. Then, the first connecting piece 27 is connected to one end of the pipe through the flange.

[0036] Reference Figure 4 , Figure 5 The guiding assembly includes slide rails 61 symmetrically fixedly connected to both sides of the inner wall of the cabin 22. An inclined member 62 is fixedly connected inside the slide rail 61 by welding or integral molding. The outer side of the inclined member 62 is an inclined surface. The inclined surface allows the positioning piece 25 to be pushed to the tail end to form an interference fit. The slide rail 61 passes horizontally through the first guide hole symmetrically opened on the positioning piece 25 and is slidably connected to the positioning piece 25. The slide rail 61 passes horizontally through the second guide hole opened on the sliding piece 23 and is slidably connected to the sliding piece 23. The inclined member 62 passes horizontally through the first guide hole symmetrically opened on the positioning piece 25 and is slidably connected to the positioning piece 25. The inclined member 62 passes horizontally through the second guide hole symmetrically opened on the sliding piece 23 and is slidably connected to the sliding piece 23. The flame arrestor core 3 is detachably installed inside the frame 24. The side wall of the positioning piece 25 is attached to the inner wall of the cabin 22 and is horizontally slidably connected.

[0037] When installing the flame arrestor core 3, as the positioning piece 25 moves horizontally guided by the slide rail 61, the horizontal movement of the positioning piece 25 will be driven by the tilting member 62, thus being squeezed in the center. When the positioning piece 25 moves to the end of the slide rail 61, an interference fit is formed, thereby further fixing the positioning piece 25. At the same time, the side wall of the sliding piece 23 and the gasket 21 remain flush, so that the flame arrestor core 3 is stably installed inside the compartment 22.

[0038] Reference Figure 3 , Figure 6 The cover plate assembly includes a cover plate 28 that fits against the side wall of the gasket 21. A second connector 29 is fixedly connected to the side of the cover plate 28 away from the gasket 21 by welding or integral molding. A plug-in piece 210 is fixedly connected to the side wall of the cover plate 28 by welding. In order to prevent the plug-in piece 210 from being worn and dented due to long-term rolling, a high-hardness hard alloy wear-resistant pad is embedded at the contact point. A positioning groove 211 is vertically opened on the side wall of the plug-in piece 210. The cover plate 28 fits against the vertical plane of the sliding piece 23 away from the frame 24. The plug-in piece 210 is symmetrically located on both sides of the cover plate 28 and remains perpendicular to the cover plate 28.

[0039] During closure, the operator aligns and fits the cover plate 28 with the gasket 21, causing the plug-in piece 210 to move horizontally synchronously and be fixed by the locking assembly. Then, the operator connects the second connector 29 to the other end of the pipe with a flange.

[0040] Reference Figure 6 - Figure 8 The locking assembly includes a side support 212 fixedly connected to the outer wall of the housing 1. A limit member 213 is fixedly connected to the outer wall of the side support 212 by welding or bolts. A fixed shaft 214 is vertically connected and rotatably connected to the upper surface of the limit member 213. A cam 215 is fixedly connected and vertically connected to the outer wall of the fixed shaft 214. A cylinder 216 is fixedly connected and vertically connected to the outer wall of the fixed shaft 214. A rotating rod 217 is fixedly connected to the outer wall of the cylinder 216 by welding or integral molding. A plug-in piece 210 is located between the two limit members 213. The upper and lower surfaces of the plug-in piece 210 are in contact with the horizontal plane of the limit member 213. The cam 215 squeezes and limits the positioning groove 211 by rotating and contacting the side support 212. The upper and lower ends of the cylinder 216 are fixedly connected to the cam 215 by welding or integral molding.

[0041] During the factory assembly process, the assembly personnel fix the side support 212 to the outer wall of the housing 1. The side support 212 and the limiting member 213 are fixedly connected by bolts, and the limiting member 213 limits the rotation of the fixed shaft 214. In use, the insert piece 210 and the cover plate 28 move synchronously, moving horizontally against the outer wall of the side support 212. The two sides of the insert piece 210 are against the inner wall of the limiting member 213 and slide relative to each other, and the limiting member 213 limits the vertical position of the insert piece 210. Subsequently, the operator rotates the rotating rod 217, which drives the cylinder 216 to rotate synchronously. The cylinder 216 drives the cam 215 to rotate synchronously. The protrusion of the cam 215 presses against the inner wall of the insert piece 210, thereby fixing the insert piece 210 through the cam 215 and completing the locking step.

[0042] Reference Figure 6 - Figure 8 A self-locking assembly is provided on the side wall of the rotating rod 217. The self-locking assembly is used to fix the rotating rod 217. The self-locking assembly includes a transverse plate 218 fixedly connected to the side wall of the rotating rod 217 by bolts or welding. A pin 219 is horizontally penetrated and slidably connected to the side wall of the transverse plate 218. A puller 220 is fixedly connected to the end of the pin 219 by welding or integral molding. The end of the pin 219 away from the puller 220 is an arc surface. A fixing ring 221 is fixedly connected to and horizontally penetrates the outer wall of the pin 219. A compression spring 222 is horizontally sleeved on the outer wall of the pin 219. A fixing plate 223 is fixedly connected to the side wall of the side support 212 by bolts or welding. The side wall of the fixing plate 223 is horizontally penetrated and slidably connected to the pin 219. One end of the compression spring 222 abuts against the side wall of the fixing ring 221, and the other end of the compression spring 222 abuts against the side wall of the transverse plate 218.

[0043] When the rotating rod 217 drives the cam 215 to rotate to the position where the insert piece 210 is fixed, the arc surface of the pin 219 fits against the edge of the fixing plate 223. When the pin 219 aligns with the hole on the side wall of the fixing plate 223, the pin 219 will slide into the side wall of the fixing plate 223 and engage with the fixing plate 223. The compression spring 222 pushes the fixing ring 221, so that the pin 219 is always slidably connected to the fixing plate 223.

[0044] When it is necessary to disassemble the cover plate 28, the operator pulls the puller 220, which causes the pin 219 to slide horizontally. The pin 219 causes the fixing ring 221 to move synchronously, and the fixing ring 221 causes the compression spring 222 to be compressed. At the same time, the pin 219 is disengaged from the fixing plate 223. Then, the puller 220 causes the transverse plate 218 to rotate, and the transverse plate 218 causes the rotating rod 217 to rotate. The rotating rod 217 causes the cam 215 to rotate, thereby releasing the cam 215 from limiting the insertion piece 210, so that the cover plate 28 can be quickly disassembled.

[0045] The high temperature heat wave generated by the detonation (assuming a transient temperature rise) Under an impact of 500℃, according to the thermal expansion mechanics model of confined outer diameter, when the outer Invar alloy layer is rigidly constrained by shell 1 and undergoes almost no thermal expansion, the enormous thermal expansion potential energy of the inner stainless steel layer is forced to be converted into radial displacement towards the geometric center axis. The radial deformation caused by this inward compression... This can be characterized by the following empirically derived formula: in: The initial diameter of the interface between the inner and outer bimetallic layers of the brake ring 4 (the typical engineering value is set to 150 mm).

[0046] The linear thermal expansion coefficient of SUS304 stainless steel is approximately .

[0047] The linear thermal expansion coefficient of Invar 36 alloy is approximately .

[0048] Substitute the above parameters into the calculation: .

[0049] In the field of precision mechanical seals, an inward radial displacement of more than 0.6 mm under extremely high pressure is enormous. This displacement will crush and compact the flexible graphite composite sealing ring 5 with overwhelming force, forcing it to undergo extreme plastic rheology at the micro level, completely filling any micron-level gaps caused by the flange deformation due to the explosion shock wave, just like a fluid.

[0050] When the rotating rod 217 is pressed to the horizontal limit locking position, the geometrically highest point of force on the cam 215 crosses the rotation axis of the fixed shaft 214 and enters the "over-dead point" region. In this state, any tiny reverse thrust remaining on the cover plate 28 acting on the cam 215 will only force the cam 215 to deflect in the "clockwise (press tighter)" direction in the torque vector direction, and will absolutely not generate the reverse release torque.

[0051] The limiting member 213 fixed to the outer wall of the side support 212 not only serves as a guide but also provides rigid shear resistance. When the cover plate assembly is subjected to an explosive impact force from the inside out, the plug-in piece 210 adheres tightly to the inner wall of the limiting member 213, directly transferring more than 95% of the axial destructive force to the robust housing 1 base, thereby "physically disengaging" the locking mechanism from the destructive stress transmission path.

[0052] The sealing ring 5 faces the high-pressure fluid and has an annular V-shaped dynamic pressure self-tightening lip groove (not shown in the figure). When the microsecond-level shock wave arrives, the high-pressure gas rushes into the V-shaped groove instantly. According to Pascal's principle of hydrostatic pressure, the fluid pressure directly opens the inner and outer lips of the sealing ring 5, achieving transient initial dynamic pressure sealing, thus gaining valuable physical locking time for subsequent millisecond-level bimetallic thermal expansion.

[0053] The implementation principle of a quick-release drawer-type flame arrester according to an embodiment of the present invention is as follows: When an internal explosion occurs, the high temperature causes the brake ring 4 to be constrained by the mechanical preload and unable to expand outward. Instead, it squeezes the sealing ring 5 inward, causing it to undergo plastic creep to fill the tiny gaps generated by the explosion shock wave. At the same time, the guide cone 7 smoothly diverts the high-speed airflow to the flame arrestor core 3, dispersing the peak pressure to the inner wall of the chamber 22 and protecting the central components from being crushed.

[0054] When installing the flame arrestor core 3, align the positioning piece 25 with the inner wall of the chamber 22 and push it in horizontally. The positioning piece 25 drives the frame 24 and the sliding piece 23 to move synchronously, pushing the pre-installed flame arrestor core 3 and the guide cone 7 into the chamber 22 as a whole. When the sliding piece 23 is flush with the gasket 21, it is installed in place. Then, the first connecting piece 27 is connected through the flange. When the positioning piece 25 moves to the end under the guidance of the slide rail 61, it cooperates with the tilting piece 62 to achieve an interference fit, further fixing the positioning piece 25.

[0055] When closed, the cover plate 28 is aligned and fitted with the gasket 21, the insert piece 210 moves synchronously and fits against the outer wall of the side support 212, and is simultaneously limited by the limiting member 213. The rotating rod 217 drives the cylinder 216 and the cam 215 to rotate, and the cam 215 presses against the side support 212 to fix the insert piece 210, thus completing the locking. The pin 219 is inserted into the hole on the side wall of the fixing plate 223 under the action of the compression spring 222.

[0056] During disassembly, pull the puller 220 to make the pin 219 slide horizontally and compress the spring 222, releasing the engagement with the fixing plate 223. Then rotate the transverse plate 218 to drive the rotating rod 217 and the cam 215 to rotate. The cam 215 releases the limit on the plug piece 210, allowing the cover plate 28 to be quickly disassembled.

[0057] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A flame arrester with a quick-release drawer type, characterized in that: The device includes a housing (1), inside which a fire-resistant core (3) is provided for fireproof isolation, and on the inner wall of the housing (1) a brake ring (4) is provided for providing rigid support. On the inner wall of the brake ring (4) a sealing ring (5) is provided for multi-layer protection. The sealing ring (5) is made of flexible graphite material that undergoes plastic creep when heated. On the outside of the fire-resistant core (3) a guide assembly for horizontal guidance is provided. One end of the fire-resistant core (3) is provided with a guide cone (7) for air flow guidance. On one side of the housing (1) a cover plate assembly for closing the inside of the housing (1) is provided. On the outer wall of the housing (1) a locking assembly for rigid clamping is provided. One end opening of the housing (1) is closed by the cover plate assembly. The locking assembly is installed on the outer wall of the housing (1) and cooperates with the cover plate assembly. The locking assembly is used to apply an inward locking force to the cover plate assembly. The brake ring (4) is a bimetallic composite structure ring. The linear thermal expansion coefficient of the outer layer of the brake ring (4) is lower than that of the inner layer. When the brake ring (4) is heated, the inner layer expands inward due to the radial constraint of the outer layer and the shell (1). The inner layer of the brake ring (4) squeezes the sealing ring (5) so that the sealing ring (5) squeezes inward to fill the gap of the shell (1).

2. A quick-release drawer-type flame arrester according to claim 1, characterized in that: The inner wall of the housing (1) is fitted with the outer wall of the brake ring (4), the inner wall of the brake ring (4) is fitted with the outer wall of the sealing ring (5), and one end of the flame arrestor core (3) is fixedly connected to the horizontal plane of the guide cone (7).

3. A quick-release drawer-type flame arrester according to claim 1, characterized in that: A gasket (21) is fixedly connected to one end of the housing (1), a chamber (22) is fixedly connected to the inner wall of the sealing ring (5), a sliding piece (23) is slidably connected to the inner wall of the gasket (21), a frame (24) is fixedly connected to the side of the sliding piece (23), a positioning piece (25) is fixedly connected to the end of the frame (24) away from the sliding piece (23), a connecting plate (26) is fixedly connected to the other end of the housing (1), and a first connecting piece (27) is fixedly connected to the side of the connecting plate (26) away from the housing (1).

4. A quick-release drawer-type flame arrester according to claim 3, characterized in that: The guiding assembly includes a slide rail (61) fixedly connected to the inner wall of the cabin (22), an inclined member (62) fixedly connected inside the slide rail (61), a guide hole symmetrically opened on the outer wall of the positioning piece (25), the slide rail (61) and the inclined member (62) horizontally passing through the guide hole 1 and slidingly connected to the positioning piece (25), a guide hole symmetrically opened on the outer wall of the sliding piece (23), the slide rail (61) and the inclined member (62) horizontally passing through the guide hole 2 and slidingly connected to the sliding piece (23), the inner wall of the frame (24) is detachably connected to the outer wall of the fire arrester core (3), and the side wall of the positioning piece (25) is slidably connected to the inner wall of the cabin (22).

5. A quick-release drawer-type flame arrester according to claim 1, characterized in that: The cover plate assembly includes a cover plate member (28) that fits against the side wall of the gasket (21). A second connector (29) is fixedly connected to the side of the cover plate member (28) away from the gasket (21). A plug-in piece (210) is fixedly connected to the side wall of the cover plate member (28). A positioning groove (211) is provided on the side wall of the plug-in piece (210).

6. A quick-release drawer-type flame arrester according to claim 5, characterized in that: The cover plate (28) is attached to the side of the sliding piece (23) away from the frame (24), and the plug piece (210) is symmetrically located on both sides of the cover plate (28).

7. A quick-release drawer-type flame arrester according to claim 5, characterized in that: The locking assembly includes a side support (212) fixedly connected to the outer wall of the housing (1). A limiting member (213) is fixedly connected to the outer wall of the side support (212). A fixed shaft (214) is movably passed through the top of the limiting member (213). A cam (215) is fixedly passed through the outer wall of the fixed shaft (214). A cylinder (216) is fixedly passed through the outer wall of the fixed shaft (214). A rotating rod (217) is fixedly connected to the outer wall of the cylinder (216). A self-locking assembly for fixing the rotating rod (217) is provided on the side wall of the rotating rod (217).

8. A quick-release drawer-type flame arrester according to claim 7, characterized in that: The insert piece (210) is located between two limiting members (213), the cam (215) presses against the positioning groove (211), and the upper and lower ends of the cylinder (216) are fixedly connected to the cam (215).

9. A quick-release drawer-type flame arrester according to claim 7, characterized in that: The self-locking assembly includes a transverse plate (218) fixedly connected to the side wall of the rotating rod (217), a pin (219) slidably connected to the side wall of the transverse plate (218), a puller (220) fixedly connected to the end of the pin (219), a fixing ring (221) fixedly passing through the outer wall of the pin (219), a compression spring (222) sleeved on the outer wall of the pin (219), and a fixing plate (223) fixedly connected to the side wall of the side support (212).

10. A quick-release drawer-type flame arrester according to claim 9, characterized in that: The side wall of the fixing plate (223) is horizontally connected to the pin (219), one end of the compression spring (222) is fixedly connected to the side wall of the fixing ring (221), and the other end of the compression spring (222) is fixedly connected to the side wall of the transverse plate (218).

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