Explosion-proof air tank pulse bag type dust collector

Abstract

The invention discloses an explosion-proof air tank pulse bag type dust collector, and relates to the technical field of explosion-proof dust collectors, the explosion-proof air tank pulse bag type dust collector comprises a pulse bag, a fixing disc and an anti-static support frame, the pulse bag comprises a conductive outer layer, a conductive middle layer and a conductive inner layer, the conductive middle layer is arranged on the side surface of the outer wall of the conductive inner layer, and the conductive outer layer is arranged on the outer side of the conductive middle layer; the top ends of the outer walls of the conductive outer layer, the conductive middle layer and the conductive inner layer are connected to the bottom end of the outer wall of the fixing disc, and an anti-static supporting frame is arranged at the top end of the outer wall of the fixing disc and arranged in the conductive inner layer. By installing the conductive outer layer, the conductive middle layer, the conductive inner layer and the anti-static supporting frame, graded filtration and three-layer three-dimensional static discharge are achieved, the redundancy and reliability of equipment are improved, full coverage and low-resistance removal of a static generation source are achieved, the risk source that explosive dust is ignited through static discharge is fundamentally eliminated, and the service life of the equipment is prolonged. And the stability and durability of the explosion-proof function are ensured.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof dust collector technology, specifically an explosion-proof air box pulse bag dust collector. Background Technology

[0002] Baghouse dust collectors are key equipment for industrial dust control and are widely used in metallurgy, chemical industry, wood processing, grain processing and other fields involving combustible dust. However, during dust treatment, the intense friction between dust and pulse bags and between dust particles during the filtration process can easily generate and accumulate a large amount of static charge. If the static charge cannot be discharged in a timely and effective manner, the accumulated charge may generate a high potential, leading to partial discharge and generating electric sparks, which can become a dangerous ignition source for igniting suspended combustible dust clouds, seriously threatening production safety.

[0003] Traditional dust collectors primarily employ passive explosion protection, installing explosion vents or doors on the dust collector housing. When an explosion occurs inside the housing, causing a sudden pressure surge, the explosion vent will rupture first, releasing the pressure and preventing the entire housing from bursting. However, this approach cannot prevent the explosion from occurring. Furthermore, once an explosion does occur, even if the explosion venting is successful, it usually means equipment damage, production interruption, and potential secondary hazards. A very small number of dust collectors incorporate conductive fibers into the pulse bag material to form a single conductive layer, dissipating the static charge generated by friction during filtration. However, this single conductive structure exhibits uneven conductivity in actual operation. Under long-term pulse jet blowing, the fibers in the pulse bag are prone to fatigue and breakage, leading to interruption of the conductive path. Moreover, it lacks the ability to monitor the static charge accumulation state in real time, making it impossible to warn of impending dangers.

[0004] Patent CN105032059B discloses an explosion-proof dust collector, which can prevent explosions during use and improve safety performance.

[0005] The aforementioned patent uses a first explosion-proof baffle to divide the upper part of the ash storage box into an air inlet chamber and an air outlet chamber. The blocking surface of the first explosion-proof baffle is set facing the primary air inlet. When a spark enters from the primary air inlet, it will naturally be blocked by the first explosion-proof baffle. The spark will hit the blocking surface and lose power, and automatically extinguish itself. However, there is still room for improvement in terms of active explosion protection and electrostatic detection and early warning.

[0006] Therefore, this application proposes an active explosion-proof air box pulse bag dust collector capable of multiple conductive properties, real-time monitoring, and intelligent early warning. Summary of the Invention

[0007] The purpose of this invention is to provide an explosion-proof air box pulse bag dust collector to solve the technical problem mentioned in the background art that the passive explosion protection of traditional dust collectors cannot prevent the occurrence of explosions, and that explosions cause equipment damage and production interruption.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an explosion-proof pulse bag dust collector, comprising a pulse bag, a fixed plate, and an antistatic support frame. The pulse bag comprises a conductive outer layer, a conductive middle layer, and a conductive inner layer. A conductive middle layer is disposed on the outer side of the conductive inner layer, and a conductive outer layer is disposed on the outer side of the conductive middle layer. The top ends of the outer walls of the conductive outer layer, conductive middle layer, and conductive inner layer are connected to the bottom end of the outer wall of the fixed plate. An antistatic support frame is disposed on the top end of the outer wall of the fixed plate. A first elastic vertical rod, a first conductive ring, and a second conductive ring at the bottom end of the antistatic support frame are in contact with the inner wall of the conductive inner layer. The fixed plate is connected to a microcurrent sensor via a connecting lug. The microcurrent sensor is connected to a grounding wire via a branch wire, and the microcurrent sensor is connected to a control console via a connecting wire.

[0009] Preferably, the outer wall of the conductive outer layer is provided with four first connecting holes, the inner wall of the conductive outer layer is in contact with the outer wall of the conductive middle layer, the outer wall of the conductive middle layer is provided with four second connecting holes, the inner wall of the conductive middle layer is in contact with the outer wall of the conductive inner layer, and the outer wall of the conductive inner layer is provided with four third connecting holes. The first connecting holes, second connecting holes, and third connecting holes are concentrically aligned, and the top edges of the outer walls of the conductive outer layer, conductive middle layer, and conductive inner layer are flush with each other.

[0010] Preferably, the first connecting hole of the conductive outer layer is connected to the second screw hole, the second screw hole is provided on the side of the outer wall of the fixed disk, the bottom end of the outer wall of the fixed disk is provided with an annular groove, the side of the inner wall of the annular groove is provided with a second screw hole that passes through the outer wall of the fixed disk, the second screw hole passes through both sides of the inner wall of the annular groove, and the side of the inner wall of the annular groove is in contact with the outer wall of the conductive outer layer and the side of the inner wall of the conductive inner layer.

[0011] Preferably, the top of the outer wall of the fixed plate is provided with four first screw holes, which are concentrically aligned with the round holes. The round holes are provided at the top of the outer wall of the positioning block, and the positioning block is provided on the side of the outer wall of the antistatic support frame.

[0012] Preferably, the bottom of the outer wall of the antistatic support frame is provided with four first elastic vertical rods, the bottom of the outer wall of the first elastic vertical rods is connected to the top of the outer wall of the first conductive ring, the bottom of the outer wall of the first conductive ring is connected to the top of the second elastic vertical rod, and the bottom of the outer wall of the second elastic vertical rod is located at the top of the outer wall of the second conductive ring.

[0013] Preferably, the bottom end of the outer wall of the antistatic support frame is in contact with the top end of the outer wall of the fixed plate, the side of the outer wall of the first elastic vertical rod is in contact with the upper half of the inner wall of the conductive inner layer, the side of the outer wall of the second elastic vertical rod is in contact with the lower half of the inner wall of the conductive inner layer, the side of the outer wall of the first conductive ring is in contact with the middle of the inner wall of the conductive inner layer, and the outer wall of the second conductive ring is in contact with the bottom end of the inner wall of the conductive inner layer.

[0014] Preferably, the fixing plate is located at the top of the outer wall of the box cover, and a bag opening is provided at the top of the outer wall of the box cover. Four positioning holes are provided on the outer side of the top of the bag opening. The positioning holes are concentrically aligned with the first screw hole and the round hole. The inner side of the bag opening is in contact with the outer side of the conductive outer layer.

[0015] Preferably, a first bolt is provided in the first screw hole, and the first bolt passes through the round hole, the first screw hole and the positioning hole to fix the fixing plate to the top of the outer wall of the box cover. The second bolt passes through the second screw hole, the first connecting hole, the second connecting hole and the third connecting hole to fix the conductive outer layer, the conductive middle layer and the conductive inner layer to the bottom of the outer wall of the fixing plate.

[0016] Preferably, the outer wall of the fixed plate is provided with a connecting ear, which is connected to a micro current sensor via an electric wire. The micro current sensor is connected to a branch line. Five branch lines are provided at the top of the outer wall of the box cover. The five branch lines are located below the five sets of bag openings and are connected to a grounding wire.

[0017] Preferably, the microcurrent sensor is connected to the control console via a connecting line. The control console is located on the side of the outer wall of the work box. The top of the outer wall of the work box is connected to the bottom of the outer wall of the box cover. Four explosion relief discs are provided on the rear side of the outer wall of the work box.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention achieves graded filtration and three-dimensional electrostatic discharge by installing a conductive outer layer, a conductive middle layer, a conductive inner layer, an anti-static support frame, and a cover. The three conductive layers physically achieve gradient filtration from coarse to fine, and electrically form a continuous conductive path from the outer surface of the pulse bag to the inner surface, and then through the anti-static support frame to the fixed plate. This solves the problem that traditional explosion-proof dust collectors can only passively prevent explosions or rely on a single conductive layer. It ensures that even if an abnormality occurs at a certain local point or in a single layer, the charge can still bypass and be discharged through other layers and paths, improving the redundancy and reliability of the equipment. It achieves full coverage and low-resistance removal of the source of static electricity generation, and immediately guides the static charge generated during filtration into the grounding wire, avoiding the accumulation of charge on any layer of the pulse bag. This fundamentally eliminates the risk source of explosive dust ignition by electrostatic discharge. The three-dimensional conductive structure ensures the stability and durability of the explosion-proof function, significantly exceeding the protective capabilities of traditional single conductive materials.

[0020] 2. This invention achieves dynamic and stable contact and efficient charge collection inside the pulse bag by installing an antistatic support frame, elastic vertical rods, and conductive rings. An antistatic support frame is installed inside the pulse bag. The first elastic vertical rod, second elastic vertical rod, first conductive ring, and second conductive ring at the bottom of the antistatic support frame are tightly attached to the inner wall of the conductive inner layer at different heights using their own elasticity, forming a multi-point and multi-faceted electrical connection from top to bottom. This solves the problem that multi-layer conductive structures frequently expand, contract, and vibrate during pulse jetting, easily leading to poor contact or even detachment due to vibration or pulse bag deformation, preventing the effective collection of accumulated charge. The elastic vertical rods and conductive rings ensure reliable and stable physical contact and electrical connection between the charge collection point and the conductive inner layer during pulse bag operation. The conductive rings provide a large circumferential collection surface, compensating for the shortcomings of point contact and ensuring that charge at any position on the circumference of the inner wall of the pulse bag can be effectively captured and conducted away.

[0021] 3. This invention, by installing a fixing plate and connecting ears, achieves the fixation of the three-layer conductive structure and the collection and output of electrostatic charge. The fixing plate firmly clamps and fixes the top of the three-layer pulse bag with bolts. The annular groove at the bottom of the fixing plate is closely fitted with the edge of the conductive layer, establishing a charge conduction path at the edge of the pulse bag. At the same time, the top surface of the fixing plate is connected to an anti-static support frame. All the electrostatic charge conducted from the pulse bag is finally collected at the fixing plate and led out to the micro-current sensor through the connecting ear interface. This solves the problems of unreliable charge collection in multi-layer conductive structures, complex connection points and easy loosening. It ensures that the charge conducted from all directions of the pulse bag can be collected with low loss, improving assembly efficiency and connection reliability.

[0022] 4. This invention, by installing micro-current sensors, branch lines, grounding wires, and a control console, achieves real-time monitoring, intelligent early warning, and visual control of electrostatic discharge status. Each fixed panel is connected to a micro-current sensor to monitor the electrostatic discharge current conducted from the fixed panel in real time. The sensor signals are collected through branch lines and finally conducted to the ground through the grounding wire, forming a complete discharge circuit. At the same time, the data from all sensors are transmitted to the control console in real time. The control console judges the situation based on a preset safe current threshold, solving the problem of not being able to visually monitor the conductivity status of the three-layer conductive structure. The control console can monitor in real time whether the electrostatic discharge of each pulse bag is normal and whether the amount of static electricity generated is within the safe range. Once the current value is detected to be below or above the threshold, the control console immediately issues an audible and visual alarm and locates the specific faulty pulse bag, enabling maintenance personnel to intervene and maintain the equipment before potential dangers develop into actual accidents. This improves the safety and predictability of equipment operation and realizes intelligent management of explosion-proof dust collectors. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the box cover structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the antistatic support frame of the present invention being pulled out of the pulse bag;

[0026] Figure 4 This is a schematic diagram of the structure of the pulse bag being pulled out of the fixed plate according to the present invention;

[0027] Figure 5 This is a schematic diagram of the pulse bag structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the antistatic support frame structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the fixed disk structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the annular groove structure of the present invention;

[0031] Figure 9 This is a partial schematic diagram of the antistatic support frame of the present invention.

[0032] In the diagram: 1. Conductive outer layer; 2. First connecting hole; 3. Conductive middle layer; 4. Second connecting hole; 5. Conductive inner layer; 6. Third connecting hole; 7. Fixing plate; 8. First screw hole; 9. Second screw hole; 10. Annular groove; 11. Antistatic support frame; 12. Positioning block; 13. First elastic vertical rod; 14. First conductive ring; 15. Second conductive ring; 16. First bolt; 17. Second bolt; 18. Box cover; 19. Bag opening; 20. Positioning hole; 21. Microcurrent sensor; 22. Branch wire; 23. Grounding wire; 24. Working box; 25. Control console; 26. Explosion relief plate; 27. Connecting lug; 28. Second elastic vertical rod. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some 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.

[0034] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 An embodiment of the present invention provides: an explosion-proof air box pulse bag dust collector, wherein the top ends of the outer walls of the conductive outer layer 1, conductive middle layer 3 and conductive inner layer 5 are connected to the bottom end of the outer wall of the fixed disk 7, and an anti-static support frame 11 is provided at the top end of the outer wall of the fixed disk 7. The first elastic vertical rod 13, the first conductive ring 14 and the second conductive ring 15 at the bottom end of the anti-static support frame 11 are in contact with the inner wall of the conductive inner layer 5. The fixed disk 7 is connected to a micro current sensor 21 through a connecting ear 27. The micro current sensor 21 is connected to a grounding wire 23 through a branch wire 22. The micro current sensor 21 is connected to a control console 25 through a connecting wire.

[0037] Furthermore, the operator first pre-assembles the three-layer conductive structure of the pulse bag, placing the conductive inner layer 5 at the innermost side, ensuring that the outer wall of the conductive inner layer 5 adheres to the inner wall of the conductive middle layer 3, and then adhering the outer wall of the conductive middle layer 3 to the inner wall of the conductive outer layer 1, ensuring that the tops of the three layers are flush, and aligning the first connecting hole 2, the second connecting hole 4, and the third connecting hole 6 on each layer concentrically. Then, the assembled pulse bag is inserted into the annular groove 10 at the bottom of the fixing plate 7, ensuring that the conductive outer layer 1 and the conductive inner layer 5 respectively adhere to the inner wall of the annular groove 10, and then the second bolt is used. 17. Pass through the second screw hole 9 and the connection hole of the three conductive layers in sequence to fix the pulse bag on the fixed plate 7 to ensure reliable electrical connection. Then insert the antistatic support frame 11 into the conductive inner layer 5 so that the round hole of the positioning block 12 is aligned with the first screw hole 8 on the top of the fixed plate 7. Screw the first bolt 16 into the round hole and the first screw hole 8 for fixation. At the same time, the first elastic vertical rod 13, the first conductive ring 14 and the second conductive ring 15 at the bottom of the antistatic support frame 11 adhere to the inner wall of the conductive inner layer 5 after installation to form multi-point contact and establish a path for electrostatic conduction.

[0038] Then the operator installs the fixing plate 7 on the box cover 18. The top of the box cover 18 is provided with a bag opening 19, and positioning holes 20 are provided around the bag opening 19. The fixing plate 7 is aligned with the bag opening 19, and the first bolt 16 passes through the positioning holes 20 to securely install the entire pulse bag on the box cover 18. After installation, the box cover 18 is installed on the top of the work box 24. The micro current sensor 21 is connected to the connecting ear 27 on the side of the fixing plate 7. The branch line 22 is arranged and connected to the grounding wire 23. The control console 25 is connected to the micro current sensor 21 through the connecting line. The explosion relief plate 26 is installed on the rear side of the outer wall of the work box 24.

[0039] Please see Figure 3 , Figure 4 , Figure 5 and Figure 6 An embodiment of the present invention provides: an explosion-proof air box pulse bag dust collector, wherein the bottom end of the outer wall of the antistatic support frame 11 is in contact with the top end of the outer wall of the fixed plate 7, the side of the outer wall of the first elastic vertical rod 13 is in contact with the upper half of the inner wall of the conductive inner layer 5, the side of the outer wall of the second elastic vertical rod 28 is in contact with the lower half of the inner wall of the conductive inner layer 5, the side of the outer wall of the first conductive ring 14 is in contact with the middle of the inner wall of the conductive inner layer 5, the outer wall of the second conductive ring 15 is in contact with the bottom end of the inner wall of the conductive inner layer 5, the positioning hole 20 at the top of the bag opening 19 is concentrically aligned with the first screw hole 8 and the round hole, and the side of the inner wall of the bag opening 19 is in contact with the side of the outer wall of the conductive outer layer 1;

[0040] Furthermore, the dust-laden gas first enters the working chamber 24 of the dust collector, and then passes through the pulse bag from the outside to the inside. The dust first comes into contact with the conductive outer layer 1 of the pulse bag. The conductive outer layer 1 traps coarse particles. The conductive outer layer 1 is made of aramid needle-punched felt, which can intercept large particles, reduce the wear of the internal filter layer, initially conduct away the static electricity generated by the friction of large particles, and transfer the charge to the middle layer. At the same time, the airflow carries finer particles to continue to pass inward through the conductive middle layer 3. The conductive middle layer 3 is a highly conductive non-woven fabric, which efficiently collects and conducts the static charge from the outer layer laterally, ensuring that even if the charge is concentrated at a certain local point, it can be quickly diffused to the entire pulse bag plane, avoiding excessively high local potential. The finest dust is filtered through the conductive inner layer 5. The conductive inner layer 5 uses continuous conductive yarn to complete the final filtration. The conductive inner layer 5 captures and conducts away static electricity in the first place, preventing the charge from accumulating on the inner surface to form potential energy that attracts dust or generates sparks. In the entire filtration process, the source of static electricity is the intense friction between the dust and the pulse bag and between the dust particles.

[0041] The conductive inner layer 5 conducts static electricity to the antistatic support frame 11. The first conductive ring 14 and the second conductive ring 15 at the bottom of the antistatic support frame 11 are metal rings coated with conductive rubber to provide a large area of ​​circumferential surface contact, compensating for the insufficient point contact of the first elastic vertical rod 13 and the second elastic vertical rod 28. This ensures that the charge at any height on the inner wall of the pulse bag can be effectively collected and the current flowing along the circumference of the pulse bag can be conducted away. The first elastic vertical rod 13 and the second elastic vertical rod 28 at the bottom of the antistatic support frame 11 are made of silver-plated spring steel. The elasticity of 8 ensures that the pulse bag can always stick tightly to the inner wall of the conductive inner layer 5 when it is frequently expanded and contracted by pulse jet, maintaining a stable physical and electrical contact point and avoiding poor contact due to vibration or pulse bag deformation. Then, the antistatic support frame 11 guides the static electricity to the fixing plate 7. The fixing plate 7 is made of galvanized steel plate, which collects all the charges from the antistatic support frame 11 and the edge of the pulse bag, and guides the collected static charge to the micro current sensor 21 through the connecting ear 27. After the static signal is detected by the micro current sensor 21, it is connected to the grounding wire 23 through the branch line 22 and finally conducted to the ground.

[0042] Please see Figure 1 , Figure 2 , Figure 7 , Figure 8 and Figure 9An embodiment of the present invention provides: an explosion-proof air box pulse bag dust collector, wherein the fixed plate 7 is provided with a connecting ear 27 on the outer side of the outer wall, the connecting ear 27 is connected to a micro current sensor 21 through a wire, the micro current sensor 21 is connected to a branch line 22, the top of the outer wall of the box cover 18 is provided with five branch lines 22, the five branch lines 22 are located below five sets of bag openings 19, the five sets of branch lines 22 are connected to a grounding wire 23, the micro current sensor 21 is connected to a control console 25 through a connecting line, and the control console 25 is located on the outer side of the working box 24;

[0043] Furthermore, each pulse bag corresponds to a bag opening 19, and a micro-current sensor 21 is installed on the outside of each bag opening 19. The micro-current sensor 21 is electrically connected to the fixed plate 7 through the connecting ear 27. The micro-current sensor 21 collects the electrostatic current signal conducted from the pulse bag in real time. The micro-current sensor 21 has a built-in signal amplification and filtering circuit, which can convert the weak current into a standard electrical signal. The micro-current sensor 21 transmits the signal to the control console 25 through the connecting line. The control console 25 has a preset safe current threshold. The minimum safe threshold of the control console 25 is set to 0.1µA. The minimum safe threshold is used to monitor the integrity of the conductive path. Under normal working conditions, the electrostatic charge should be continuously discharged through the conductive pulse bag and the anti-static support frame 11, generating a small but measurable reference current. When the monitoring current of a certain channel is continuously lower than 0.1µA, the control console 25 determines that the conductive path has been broken, such as the conductive fiber is broken, the elastic contact fails, or the connection is loose, thus losing the electrostatic discharge capability. Then the control console 25 triggers a path fault alarm.

[0044] The maximum safety threshold of the control console 25 is set to 5µA. The maximum safety threshold is used to warn of excessive accumulation of static electricity. When the dust flow rate is too fast, the humidity is extremely low, or abnormal friction occurs, the static electricity generation rate exceeds the discharge rate, resulting in a significant increase in discharge current. When the detected current continues to exceed 5µA, it indicates that the static electricity energy accumulation at this point has reached a potentially dangerous level and there is a risk of breakdown discharge. The control console 25 will immediately trigger a static electricity over-limit alarm.

[0045] When the alarm is triggered, the indicator light corresponding to the bag opening 19 on the control panel of the console 25 changes from green to red and flashes. An alarm dialog box pops up on the screen of the console 25, displaying the number of the alarmed bag opening 19 and the alarm type. The alarm types are divided into path failure and static electricity exceeding the standard, realizing the leap from passive protection to active early warning, and improving the operational safety of the dust collector in flammable and explosive dust environments.

[0046] Please see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8An embodiment of the present invention provides: an explosion-proof air box pulse bag dust collector, wherein a first bolt 16 is provided in the first screw hole 8, the first bolt 16 passes through the round hole, the first screw hole 8 and the positioning hole 20 to fix the fixing plate 7 to the top of the outer wall of the box cover 18, and a second bolt 17 passes through the second screw hole 9, the first connecting hole 2, the second connecting hole 4 and the third connecting hole 6 to fix the conductive outer layer 1, the conductive middle layer 3 and the conductive inner layer 5 to the bottom of the outer wall of the fixing plate 7;

[0047] Furthermore, when the control panel 25 issues an alarm and displays the specific bag opening 19 number, such as A6 indicating a fault in the passage of the sixth bag opening 19 in the first row, and B5 indicating a fault in the passage of the fifth bag opening 19 in the second row, the operator uses the control panel 25 to cut off the pulse jet air path of the air box of the bag opening 19 to prevent accidental jetting. Then, the operator closes the inlet valve of the dust collector. After the equipment has completely stopped and waited for a period of time, the operator goes to the equipment site, finds the corresponding pulse bag through the bag opening 19 number marked on the cover 18, and then replaces the pulse bag. When replacing, first use a tool to loosen the fixing plate 7 above the bag opening 19. Using the first bolt 16, lift the fixing plate 7 and the anti-static support frame 11 upwards to detach the pulse bag from the bag opening 19. Then, unscrew the second bolt 17 connecting the pulse bag and the fixing plate 7, remove the old pulse bag, and install the new pulse bag at the bottom of the fixing plate 7. After replacement, reset or zero the micro-current sensor 21 at the bag opening 19 on the control panel 25 and observe whether the detected current value returns to the normal range. After confirming that there is no problem, restore the air passage and valve at the bag opening 19 to ensure the safety and efficiency of maintenance operations. The positioning and standardized replacement steps reduce downtime.

[0048] Please see Figure 1 and Figure 2 An embodiment of the present invention is provided: an explosion-proof gas box pulse bag dust collector, wherein the micro current sensor 21 is connected to the control console 25 via a connecting line, the control console 25 is set on the side of the outer wall of the working box 24, the top of the outer wall of the working box 24 is connected to the bottom of the outer wall of the box cover 18, and four explosion relief plates 26 are provided on the rear side of the outer wall of the working box 24.

[0049] Furthermore, when the control panel 25 alarms, operators should first move away from the equipment and wait for the equipment to be shut down before carrying out fault repairs. This is to avoid dust explosions caused by excessive static electricity. The explosion relief disc 26 is made of metal foil. The burst pressure of the explosion relief disc 26 is lower than the explosion resistance of the working box 24. The explosion relief disc 26 is located on the explosion relief port on the back of the working box 24, which leads to a safe area. When a dust explosion occurs inside the working box 24, the instantaneously generated high-temperature and high-pressure gas causes the internal pressure to rise sharply. When the pressure reaches the set burst threshold of the explosion relief disc 26, the explosion relief disc 26 ruptures rapidly, forming an open venting channel. The explosion flame, shock wave, and unburned dust are released in a predetermined direction behind the equipment through the venting channel, thereby preventing structural damage to the working box 24 due to overpressure, preventing the explosion energy from spreading to the front of the equipment or other areas of the workshop, and guiding the explosion pressure in a safe direction. This effectively protects the main structure of the equipment and the safety of the operators, avoids more catastrophic secondary explosions or equipment fragment injuries, and significantly reduces the overall risk and economic loss of explosion accidents.

[0050] Working principle: After the dust-laden gas enters the working chamber 24, it passes through the three conductive layers of the pulse bag from the outside to the inside, namely the conductive outer layer 1, the conductive middle layer 3, and the conductive inner layer 5, which intercept the dust step by step. During the filtration process, the three conductive layers conduct away the static electricity generated by the friction of the dust in real time to prevent the accumulation of charge. The static electricity is conducted to the anti-static support frame 11 through the conductive inner layer 5. The anti-static support frame 11 ensures a stable conductive path through the multiple contacts between the elastic vertical rod and the conductive ring, and finally collects the static electricity into the fixed plate 7.

[0051] The fixed plate 7 transmits electrostatic signals to the micro-current sensor 21 via the connecting ear 27. The micro-current sensor 21 monitors the electrostatic current in real time and transmits the signal to the control console 25. When the current is lower or higher than the set threshold, the control console 25 automatically alarms and indicates the fault type, realizing proactive early warning. At the same time, the equipment is equipped with a venting disc 26, which ruptures rapidly when the internal pressure rises abnormally, releasing the explosive pressure in a directional manner, ensuring the safety of the equipment and personnel, and significantly improving the operational safety and reliability in flammable and explosive dust environments.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An explosion-proof pulse jet bag filter, comprising a pulse jet bag, a fixed plate (7), and an anti-static support frame (11), characterized in that: The pulse bag includes a conductive outer layer (1), a conductive middle layer (3) and a conductive inner layer (5). The conductive middle layer (3) is provided on the outer side of the conductive inner layer (5). The conductive outer layer (1) is provided on the outer side of the conductive middle layer (3). The top of the outer walls of the conductive outer layer (1), the conductive middle layer (3) and the conductive inner layer (5) are connected to the bottom of the outer wall of the fixed disk (7). The top of the outer wall of the fixed disk (7) is provided with an anti-static support frame (11). The first elastic vertical rod (13), the first conductive ring (14) and the second conductive ring (15) at the bottom of the anti-static support frame (11) are in contact with the inner wall of the conductive inner layer (5). The fixed disk (7) is connected to the micro current sensor (21) through the connecting ear (27). The micro current sensor (21) is connected to the grounding wire (23) through the branch wire (22). The micro current sensor (21) is connected to the control console (25) through the connecting wire.

2. The explosion-proof air box pulse bag dust collector according to claim 1, characterized in that: The outer wall of the conductive outer layer (1) is provided with four first connecting holes (2), the inner wall of the conductive outer layer (1) is in contact with the outer wall of the conductive middle layer (3), the outer wall of the conductive middle layer (3) is provided with four second connecting holes (4), the inner wall of the conductive middle layer (3) is in contact with the outer wall of the conductive inner layer (5), the outer wall of the conductive inner layer (5) is provided with four third connecting holes (6), the first connecting holes (2), the second connecting holes (4) and the third connecting holes (6) are concentrically aligned with each other, and the tops of the outer walls of the conductive outer layer (1), the conductive middle layer (3) and the conductive inner layer (5) are flush with each other.

3. The explosion-proof air box pulse bag dust collector according to claim 2, characterized in that: The first connecting hole (2) of the conductive outer layer (1) is connected to the second screw hole (9). The second screw hole (9) is provided on the outer wall side of the fixed disk (7). An annular groove (10) is provided at the bottom of the outer wall of the fixed disk (7). The inner wall side of the annular groove (10) is provided with a second screw hole (9) that passes through the outer wall of the fixed disk (7). The second screw hole (9) passes through both sides of the inner wall of the annular groove (10). The inner wall side of the annular groove (10) is in contact with the outer wall of the conductive outer layer (1) and the inner wall side of the conductive inner layer (5).

4. The explosion-proof air box pulse bag dust collector according to claim 3, characterized in that: The top of the outer wall of the fixed plate (7) is provided with four first screw holes (8), which are concentrically aligned with the round hole. The round hole is located at the top of the outer wall of the positioning block (12), and the positioning block (12) is located on the side of the outer wall of the antistatic support frame (11).

5. The explosion-proof air box pulse bag dust collector according to claim 4, characterized in that: The bottom of the outer wall of the antistatic support frame (11) is provided with four first elastic vertical rods (13). The bottom of the outer wall of the first elastic vertical rod (13) is connected to the top of the outer wall of the first conductive ring (14). The bottom of the outer wall of the first conductive ring (14) is connected to the top of the second elastic vertical rod (28). The bottom of the outer wall of the second elastic vertical rod (28) is located at the top of the outer wall of the second conductive ring (15).

6. The explosion-proof air box pulse bag dust collector according to claim 5, characterized in that: The bottom of the outer wall of the antistatic support frame (11) is in contact with the top of the outer wall of the fixed plate (7), the side of the outer wall of the first elastic vertical rod (13) is in contact with the upper half of the inner wall of the conductive inner layer (5), the side of the outer wall of the second elastic vertical rod (28) is in contact with the lower half of the inner wall of the conductive inner layer (5), the side of the outer wall of the first conductive ring (14) is in contact with the middle of the inner wall of the conductive inner layer (5), and the outer wall of the second conductive ring (15) is in contact with the bottom of the inner wall of the conductive inner layer (5).

7. The explosion-proof air box pulse bag dust collector according to claim 3, characterized in that: The fixing plate (7) is set at the top of the outer wall of the box cover (18). The top of the outer wall of the box cover (18) is provided with a bag opening (19). Four positioning holes (20) are provided on the outer side of the top of the bag opening (19). The positioning holes (20) are concentrically aligned with the first screw hole (8) and the round hole. The inner side of the bag opening (19) is in contact with the outer side of the conductive outer layer (1).

8. The explosion-proof air box pulse bag dust collector according to claim 7, characterized in that: A first bolt (16) is provided in the first screw hole (8). The first bolt (16) passes through the round hole, the first screw hole (8) and the positioning hole (20) to fix the fixed plate (7) to the top of the outer wall of the box cover (18). The second bolt (17) passes through the second screw hole (9), the first connecting hole (2), the second connecting hole (4) and the third connecting hole (6) to fix the conductive outer layer (1), the conductive middle layer (3) and the conductive inner layer (5) to the bottom of the outer wall of the fixed plate (7).

9. The explosion-proof air box pulse bag filter according to claim 8, characterized in that: The outer wall of the fixed plate (7) is provided with a connecting ear (27), which is connected to the micro current sensor (21) via a wire. The micro current sensor (21) is connected to the branch line (22). Five branch lines (22) are provided at the top of the outer wall of the box cover (18). The five branch lines (22) are located below the five sets of bag openings (19). The five sets of branch lines (22) are connected to the grounding wire (23).

10. The explosion-proof air box pulse bag dust collector according to claim 9, characterized in that: The microcurrent sensor (21) is connected to the control console (25) via a connecting line. The control console (25) is located on the side of the outer wall of the work box (24). The top of the outer wall of the work box (24) is connected to the bottom of the outer wall of the box cover (18). Four explosion relief discs (26) are provided on the rear side of the outer wall of the work box (24).

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