Air-breathing smoke detector for explosion-proof occasion
By combining the suction smoke detector with an aspirated smoke detector and an explosion-proof shell, the metal sintered net and tight connection are solved, and the problem that traditional detectors cannot work stably in a high-concentration explosive gas environment is achieved. Efficient fire detection and explosion-proof performance reduce the risk of explosion.
Patent Information
- Application Number
- CN202323615824.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-28
AI Technical Summary
Traditional smoke detectors cannot operate stably in high-concentration explosive gas environments, and may become a fire source or cause sparks, increasing the risk of explosion, and cannot meet the safety needs of explosion-proof occasions.
A suction smoke detector is designed, using an intake smoke detection module and an isolated explosion-proof shell. A metal sintered net is installed in the intake and outlet to block the ignition factors and pass through the shell and upper cover. The bonding surface surface roughness is less than Ra1.6 and the gap is less than 0.15mm. The metal sintered mesh is fixed using a pressing device to ensure stability and sealing.
It realizes stable work in a high-concentration explosive gas environment, accurately detects extremely early fire smoke, improves fire prevention and control effects and explosion-proof performance, reduces explosion risks, and improves the reliability and safety of the system through sealing and filtration efficiency. .
Smart Images
Figure CN222189992U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of fire detection, and in particular, relates to an aspirating smoke detector for use in explosion-proof occasions. Background Art
[0002] In many industrial environments, such as oil and gas extraction, chemical production, coal mining, etc., the presence of explosive gas is a common safety hazard. Explosive gas in these environments may cause fire or explosion due to equipment failure, operating error or other unexpected circumstances, posing a serious threat to personnel safety and equipment. Therefore, smoke detection and early warning in these environments are crucial.
[0003] Traditional smoke detectors are mainly based on the photoelectric effect or ionization principle. When smoke enters the detector, it changes the propagation of light or generates current, thus triggering an alarm. However, these traditional detectors may not meet the needs in explosion-proof occasions. First, they may not work properly in high-concentration explosive gas environments because these gases may interfere with the working principle of the detector. Second, if the detector itself fails or is damaged, it may become a source of fire or cause sparks, further increasing the risk of explosion. Therefore, it is necessary to propose a new aspirating smoke detector technology for explosion-proof occasions. This technology should be able to work stably in high-concentration explosive gas environments. Utility Model Content
[0004] In order to solve the above-mentioned problems of the prior art, the present application proposes an aspirating smoke detector for use in explosion-proof occasions, which uses a core aspirating smoke detection module combined with an isolated explosion-proof shell, and adds a metal sintered mesh at the air inlet and exhaust ports to block possible ignition factors in the air intake and exhaust.
[0005] The present application provides an aspirating smoke detector for explosion-proof occasions, comprising a shell, an upper cover, a detection module, a metal sintered mesh and a plug. The shell is provided with a plurality of mounting holes around it. The upper cover is connected to the shell by bolts around it. The surface roughness of the joint surface between the upper cover and the shell is less than Ra1.6, and the joint surface gap between the shell and the upper cover is less than 0.15mm. The detection module is fixed inside the shell and is used to detect smoke in the very early stage of a fire. The detection module consists of an air inlet, an air suction component, a PCB component and an air outlet. The inlet The air inlet and the air outlet are respectively installed at the corresponding mounting holes. The air suction component is connected to the air inlet and the PCB component, and is used to suck air into the PCB component through the air inlet. The PCB component is used to detect the air. The air outlet is connected to the PCB component and is used to discharge the detected air. The air inlet and the air outlet of the detection module are both provided with metal sintered meshes. The metal sintered meshes are fixedly installed at the air inlet and the air outlet of the detection module through a clamping device, and are used to block the ignition factors in the air inlet and the air outlet. The plug is used to seal the mounting holes where the air inlet and the air outlet are not installed.
[0006] Preferably, the connection portion between the plug and the mounting hole adopts a flameproof thread structure.
[0007] Preferably, a window glass is embedded in the middle of the upper cover, the window glass is made of tempered glass, a window pressure plate is provided on the side of the upper cover close to the shell, the window glass is fixedly mounted on the upper cover through the window pressure plate, and epoxy resin glue is coated on the joint surface of the window glass and the upper cover.
[0008] Preferably, the clamping device includes an air port explosion-proof adapter and an explosion-proof mesh pressure ring, the explosion-proof adapter is inserted at the air inlet and outlet of the detection module, the metal sintered mesh is located inside the inner hole of the explosion-proof adapter, and the explosion-proof mesh pressure ring is used to tightly fix the metal sintered mesh.
[0009] Preferably, an adhesive-backed sealing pad is mounted on the outer wall of the explosion-proof adapter, which is used to seal and fix the explosion-proof adapter to the mounting hole by gluing.
[0010] Preferably, a rubber ring is provided at the abutment portion between the explosion-proof adapter and the mounting hole.
[0011] Preferably, the metal sintered mesh is made of stainless steel and sintered by powder metallurgy, with a density of 80 meshes.
[0012] Preferably, a grounding bolt is provided on the side of the shell, and the grounding bolt is used to connect a ground wire.
[0013] In summary, the present application includes at least one of the following beneficial technical effects:
[0014] 1. By setting the surface roughness of the joint surface between the shell and the upper cover to be less than Ra1.6 and the gap to be less than 0.15mm, the sealing performance of the explosion-proof shell is improved and the possibility of explosion is reduced.
[0015] 2. The detection module can accurately detect smoke in the very early stages of a fire, provide early warning, and improve the effectiveness of fire prevention and control.
[0016] 3. The setting of metal sintered mesh effectively blocks the ignition factors in the air intake and outlet, further improving the explosion-proof performance.
[0017] 4. The use of the clamping device ensures the stability and sealing of the metal sintered mesh to prevent leakage or loosening. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of an aspirating smoke detector used in explosion-proof places in the present application;
[0020] Figure 2 This is a schematic diagram of the structure of the detection module in this application;
[0021] Figure 3 This is a schematic diagram of the side structure of an aspirating smoke detector used in explosion-proof occasions in the present application;
[0022] Figure 4 A side cross-sectional view of an aspirating smoke detector for explosion-proof applications in the present application;
[0023] Figure 5 for Figure 4 A partial enlarged view of the middle A;
[0024] Figure 6 for Figure 4 A partial enlarged view of point B in the middle.
[0025] Figure numerals: 1. Shell; 2. Upper cover; 3. Detection module; 4. Metal sintered mesh; 5. Plug; 6. Explosion-proof adapter; 7. Explosion-proof mesh pressure ring; 8. Adhesive-backed sealing gasket; 9. Rubber ring; 10. Grounding bolt; 21. Window glass; 22. Window pressure plate; 31. Air inlet; 32. Air suction assembly; 33. PCB assembly; 34. Air outlet. DETAILED DESCRIPTION
[0026] The embodiments described with reference to the accompanying drawings are exemplary, and embodiments of the present application are described in detail below.
[0027] Reference below Figure 1-4, describes an aspirating smoke detector for explosion-proof occasions according to an embodiment of the present application, including a shell 1, an upper cover 2, a detection module 3, a metal sintered mesh 4 and a plug 5. The shell 1 is provided with a plurality of mounting holes around it. The upper cover 2 is connected to the shell 1 by bolts around it. The surface roughness of the joint surface between the upper cover 2 and the shell 1 is less than Ra1.6, and the joint surface gap between the shell 1 and the upper cover 2 is less than 0.15mm. The detection module 3 is fixed inside the shell 1 and is used to detect smoke in the very early stage of a fire. The detection module 3 is composed of an air inlet 31, an air suction component 32, a PCB component 33 and an air outlet 34. The air inlet 31 and the air outlet 34 are respectively installed at the corresponding installation holes, the suction component 32 is connected to the air inlet and the PCB component 33, and is used to suck air into the PCB component 33 through the air inlet 31, the PCB component 33 is used to detect the air, the air outlet 34 is connected to the PCB component 33, and is used to discharge the detected air, the air inlet 31 and the air outlet 34 of the detection module 3 are both provided with metal sintered meshes 4, the metal sintered meshes 4 are fixedly installed at the air inlet 31 and the air outlet 34 of the detection module 3 through a clamping device, and are used to block the ignition factors in the air inlet and outlet, and the plug 5 is used to seal the installation holes where the air inlet 31 and the air outlet 34 are not installed.
[0028] In the above-mentioned embodiment, the shell 1 and the upper cover 2 are connected by bolts to ensure the tightness of the joint surface. The detection module 3 is fixed inside the shell 1 so that it can accurately detect the smoke in the very early stage of the fire. The air inlet 31 and the air outlet 34 are installed at the corresponding mounting holes so that the air can smoothly enter and discharge the detection module 3. The suction component 32 sucks the air from the air inlet 31 into the PCB component 33, the PCB component 33 detects the air, and the air outlet 34 discharges the detected air to ensure the normal operation of the system. A metal sintered mesh 4 is arranged at the air inlet 31 and the air outlet 34 to block the ignition factors in the air intake and outlet and improve the explosion-proof performance. The metal sintered mesh 4 is fixedly installed at the air inlet 31 and the air outlet 34 of the detection module 3 by a clamping device to ensure its stability and sealing. For the mounting holes where the air inlet 31 and the air outlet 34 are not installed, a plug 5 is used to seal them to prevent external impurities from entering the system. Among them, by setting the surface roughness of the joint surface of the shell 1 and the upper cover 2 to be less than Ra1.6 and the gap to be less than 0.15mm, the sealing performance of the explosion-proof shell is improved and the possibility of explosion is reduced. The detection module 3 can accurately detect the smoke in the very early stage of the fire, give early warning, and improve the effect of fire prevention and control. The setting of the metal sintered mesh 4 effectively blocks the ignition factors in the air intake and outlet, and further improves the explosion-proof performance. The use of the clamping device ensures the stability and sealing of the metal sintered mesh 4 to prevent leakage or loosening. The use of the plug 5 ensures the sealing of the mounting holes at the uninstalled air inlet 31 and the air outlet 34, prevents external impurities from entering the system, and improves the overall reliability.
[0029] In a preferred embodiment, the connection part between the plug 5 and the mounting hole adopts a flameproof thread structure. During operation, the flameproof thread structure has good self-locking properties, can firmly fix the connection between the plug 5 and the mounting hole, can withstand large loads and vibrations, and ensure that a reliable connection state can still be maintained in a harsh working environment. Moreover, the flameproof thread structure can effectively block the external explosion energy from being transmitted to the inside of the device, reduce the possibility of explosion, and thus improve the explosion-proof performance of the entire system.
[0030] In a preferred embodiment, Figure 5 As shown, a window glass 21 is embedded in the middle of the upper cover 2, and the window glass 21 is made of tempered glass. A window pressing plate 22 is provided on the side of the upper cover 2 close to the shell 1. The window glass 21 is fixedly mounted on the upper cover 2 through the window pressing plate, and epoxy resin glue is coated on the joint surface of the window glass 21 and the upper cover 2.
[0031] In the above-mentioned embodiment, the existence of the window glass 21 allows the user to observe the internal operating status of the product through the upper cover 2, thereby improving the visibility of the product and the user experience. The window glass 21 is made of tempered glass, which can effectively protect the internal components from the influence of the external environment and extend the service life of the product. The existence of the window pressure plate 22 makes the installation of the window glass 21 more firm and stable, and also facilitates the maintenance and inspection of the window glass 21. The joint surface between the window glass 21 and the upper cover 2 is coated with epoxy resin glue, which can effectively prevent moisture, dust, etc. from entering the interior of the product and improve the sealing performance of the product.
[0032] In a preferred embodiment, Figure 6 As shown, the pressing device includes an air port explosion-proof adapter 6 and an explosion-proof net pressing ring 7. The explosion-proof adapter 6 is inserted at the air inlet 31 and the air outlet 34 of the detection module 3. The metal sintered net 4 is located inside the inner hole of the explosion-proof adapter 6. The explosion-proof net pressing ring 7 is used to tightly fix the metal sintered net 4. During operation, the explosion-proof adapter 6 is inserted at the air inlet 31 and the air outlet 34 of the detection module 3, and the sampling pipeline is connected externally, which can effectively prevent dangerous factors such as explosion or fire from entering the detection module 3 through the air inlet 31 and the air outlet 34, thereby improving the safety of the system. The metal sintered net 4 is located inside the inner hole of the explosion-proof adapter 6, which can effectively filter impurities and particulate matter in the air to prevent them from entering the detection module 3, thereby protecting the normal operation of the detection module 3. The explosion-proof net pressing ring 7 is used to tightly fix the metal sintered net 4, ensure the close connection between the metal sintered net 4 and the explosion-proof adapter 6, and prevent the metal sintered net 4 from loosening or falling off, thereby further improving the safety of the system.
[0033] In a preferred embodiment, an adhesive seal 8 is mounted on the outer wall of the explosion-proof adapter 6, which is used to seal and fix the explosion-proof adapter 6 at the mounting hole by gluing, and a rubber ring 9 is provided at the abutment between the explosion-proof adapter 6 and the mounting hole. During operation, the double sealing of the adhesive seal 8 and the rubber ring 9 can effectively reduce the risk of gas leakage and the probability of accidents such as explosion or fire.
[0034] In a preferred embodiment, the metal sintered mesh 4 is made of stainless steel and sintered by powder metallurgy, with a density of 80 meshes.
[0035] In the above-mentioned embodiment, the stainless steel material has excellent corrosion resistance and can resist the erosion of chemical substances such as acid and alkali, thereby ensuring the stability and service life of the metal sintered mesh 4. The metal sintered mesh 4 sintered by powder metallurgy has a high porosity and uniform pore size distribution, which can provide a larger gas flow area and improve the gas filtration efficiency. The density of 80 mesh makes the metal sintered mesh 4 have a larger opening rate, so that the flue gas can pass smoothly, while filtering a larger volume of ignition factors to ensure the stable operation of the device.
[0036] In a preferred embodiment, a grounding bolt 10 is provided on the side of the housing 1, and the grounding bolt 10 is used to connect the ground wire. During operation, the housing 1 can be connected to the ground wire by providing the grounding bolt 10 to achieve grounding protection of the electrical equipment. When leakage or other faults occur in the equipment, the current can quickly flow into the ground through the grounding bolt 10, avoiding the occurrence of electric shock accidents to the human body, thereby improving the safety of using the equipment.
[0037] In a specific implementation manner: the shell 1 and the upper cover 2 are connected by bolts to ensure the tightness of the joint surface, the detection module 3 is fixed inside the shell 1, so that it can accurately detect the smoke in the very early stage of the fire, the air inlet 31 and the air outlet 34 are installed at the corresponding installation holes, so that the air can smoothly enter and discharge the detection module 3, the suction component 32 sucks the air from the air inlet 31 into the PCB component 33, the PCB component 33 detects the air, and the air outlet 34 discharges the detected air to ensure the normal operation of the system, and a metal sintered mesh 4 is arranged at the air inlet 31 and the air outlet 34 to block the ignition factors in the air intake and outlet and improve the explosion-proof performance, and a clamping device is used to fix the metal sintered mesh 4 at the air inlet 31 and the air outlet 34 of the detection module 3 to ensure its stability and sealing. The mounting holes where the air inlet 31 and the air outlet 34 are not installed are sealed with plugs 5 to prevent external impurities from entering the system. The explosion-proof adapter 6 is inserted at the air inlet 31 and the air outlet 34 of the detection module 3, and the external sampling pipeline is connected to effectively prevent dangerous factors such as explosion or fire from entering the detection module 3 through the air inlet 31 and the air outlet 34, thereby improving the safety of the system. The metal sintered mesh 4 is located inside the inner hole of the explosion-proof adapter 6, which can effectively filter impurities and particulate matter in the air to prevent them from entering the detection module 3, thereby protecting the normal operation of the detection module 3. The explosion-proof mesh pressure ring 7 is used to tightly fix the metal sintered mesh 4, ensure the tight connection between the metal sintered mesh 4 and the explosion-proof adapter 6, prevent the metal sintered mesh 4 from loosening or falling off, and further improve the safety of the system.
[0038] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. An aspirating smoke detector for explosion-proof applications, characterized in that: include: A shell (1), wherein a plurality of mounting holes are formed around the shell (1); An upper cover (2), the upper cover (2) being connected to the shell (1) by bolts on all sides, the surface roughness of the joint surface between the upper cover (2) and the shell (1) being less than Ra1.6, and the gap between the joint surface between the shell (1) and the upper cover (2) being less than 0.15 mm; A detection module (3), the detection module (3) being fixed inside the housing (1) and used for detecting smoke in the very early stage of a fire, the detection module (3) being composed of an air inlet (31), an air suction component (32), a PCB component (33) and an air outlet (34), the air inlet (31) and the air outlet (34) being respectively mounted at corresponding mounting holes, the air suction component (32) being connected to the air inlet and the PCB component (33) and being used for sucking air into the PCB component (33) through the air inlet (31), the PCB component (33) being used for detecting air, and the air outlet (34) being connected to the PCB component (33) and being used for discharging air after detection; A metal sintered mesh (4), wherein the air inlet (31) and the air outlet (34) of the detection module (3) are both provided with the metal sintered mesh (4), and the metal sintered mesh (4) is fixedly mounted at the air inlet (31) and the air outlet (34) of the detection module (3) through a clamping device, and is used to block ignition factors in the air inlet and the air outlet; A plug (5) is used to seal the installation holes where the air inlet (31) and the air outlet (34) are not installed.
2. The aspirating smoke detector for explosion-proof occasions according to claim 1, characterized in that: The connection portion between the plug (5) and the mounting hole adopts a flameproof thread structure.
3. The aspirating smoke detector for explosion-proof occasions according to claim 1, characterized in that: A window glass (21) is embedded in the middle of the upper cover (2), and the window glass (21) is made of tempered glass. A window pressing plate (22) is provided on a side of the upper cover (2) close to the shell (1), and the window glass (21) is fixedly mounted on the upper cover (2) via the window pressing plate, and epoxy resin glue is coated on the joint surface between the window glass (21) and the upper cover (2).
4. The aspirating smoke detector for explosion-proof occasions according to claim 1, characterized in that: The clamping device comprises an air port explosion-proof adapter (6) and an explosion-proof mesh pressure ring (7); the explosion-proof adapter (6) is inserted at the air inlet (31) and the air outlet (34) of the detection module (3); the metal sintered mesh (4) is located inside the inner hole of the explosion-proof adapter (6); and the explosion-proof mesh pressure ring (7) is used to press and fix the metal sintered mesh (4).
5. The aspirating smoke detector for explosion-proof occasions according to claim 4, characterized in that: The outer wall of the explosion-proof adapter (6) is provided with an adhesive-backed sealing pad (8) for sealing and fixing the explosion-proof adapter (6) at the mounting hole by gluing.
6. The aspirating smoke detector for explosion-proof occasions according to claim 5, characterized in that: A rubber ring (9) is provided at the abutment point between the explosion-proof adapter (6) and the mounting hole.
7. The aspirating smoke detector for explosion-proof applications according to claim 6, characterized in that: The metal sintered mesh (4) is made of stainless steel and sintered by powder metallurgy, with a density of 80 meshes.
8. The aspirating smoke detector for explosion-proof applications according to claim 1, characterized in that: A grounding bolt (10) is provided on the side of the housing (1), and the grounding bolt (10) is used to connect a ground wire.