Buffering, sealing and explosion-proof device for coal mine electromechanical equipment based on gas sensing

Abstract

The invention relates to the technical field of coal mine electromechanical equipment protection, and discloses a coal mine electromechanical equipment buffer sealing explosion-proof device based on gas sensing, which comprises a shell, and the left side and the right side of the shell are fixedly connected with a plurality of mounting plates. According to the buffer sealing explosion-proof device, gas in the buffer sealing explosion-proof device can be accurately and efficiently extracted through the extraction assemblies, the explosion risk is completely eradicated, the extraction assemblies are arranged at the tops of the left side and the right side of the inner wall of the shell, a micro motor is used for driving a threaded rod to rotate, and a threaded block and a piston are driven to slide back and forth in an empty cylinder; in combination with directional control of the first one-way valve and the second one-way valve, the first extraction pipe and the second extraction pipe are accurately aligned to the top of the device and a gas accumulation area around electromechanical equipment, directional, small-flow and short-time efficient extraction is achieved, the local gas concentration can be rapidly reduced, the smoothness of gas emission is guaranteed, and the gas extraction efficiency is improved. And external coal dust and other impurities can be prevented from entering the exhaust pipe through the second protective net, and long-term stable operation of the extraction assembly is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of protection technology for coal mine electromechanical equipment, and in particular to a buffer sealing explosion-proof device for coal mine electromechanical equipment based on gas sensing. Background Technology

[0002] Coal mine electromechanical equipment operates in a gaseous environment. During gas utilization and emission, a large number of electrically powered coal mine electromechanical equipment are required to perform core functions such as gas extraction, transportation, power generation, and safety monitoring. This equipment mainly includes frequency converters, gas generator sets, and explosion-proof cables for mining. Electrically powered equipment is a critical infrastructure for ensuring the stable operation of the gas utilization and emission system; its reliability directly affects coal mine production safety and gas resource utilization efficiency. In gas utilization and emission scenarios, this equipment is constantly exposed to a complex environment containing gas. Gas can pose multiple safety threats to equipment operation. Due to its flammable and explosive properties, when the gas concentration inside the equipment accumulates to the explosion limit range of 5% to 15%, electrical sparks or high temperatures in components can easily trigger an explosion, damaging the explosion-proof structure and threatening the safety of surrounding operations. To ensure heat dissipation, all electrically powered equipment must be equipped with unidirectional ventilation vents. The inherent contradiction between demand and sealing performance: Electrical equipment generates a large amount of heat during operation. To ensure normal operation, ventilation and heat dissipation vents must be installed to facilitate heat exchange. Explosion-proof sealing devices need to achieve functions such as cable connection and pipeline docking through interfaces on both the front and rear sides. At the same time, it is difficult to completely prevent gas leakage at the connection between the top cover and the shell, and at component assembly gaps. The physical properties of methane gas drive its infiltration. Methane gas density is approximately 0.717 kg / m³, lower than air, and it tends to linger on the top of the explosion-proof device and around the electromechanical equipment. It has the characteristics of upward diffusion and flow. The presence of heat dissipation vents breaks the complete sealing of the equipment, allowing methane gas in the environment to continuously seep into the equipment, forming internal accumulation. The mixture of methane and coal dust easily adheres to the equipment's heat dissipation channels and the surface of heating elements, blocking the heat dissipation channels, leading to reduced equipment heat dissipation efficiency, overheating and damage to components, further exacerbating the risk of equipment failure and the hidden danger of methane accumulation. To address the above-mentioned problems of methane infiltration and accumulation...

[0003] Existing explosion-proof buffer sealing devices suffer from poor air circulation, leading to stagnation. The limited internal space of these devices, coupled with the arrangement of the equipment and wiring harnesses, obstructs airflow, creating localized dead zones. Mixtures of methane and coal dust easily adhere to the surfaces of the equipment, heat dissipation channels, and heating elements, clogging these channels and reducing localized heat dissipation efficiency. Furthermore, existing explosion-proof sealing devices lack targeted methane extraction structures, relying solely on overall ventilation to reduce internal methane concentration. This overall ventilation has limited effectiveness in areas with poor air circulation, such as the top of the device and the surrounding area, failing to create directional and precise airflow guidance, resulting in methane gas stagnation in these areas. When the gas concentration inside the equipment becomes too high due to continuous accumulation, it is necessary to shut down the machine and disconnect the power before using overall ventilation replacement or opening the cover for cleaning. This operation is cumbersome and time-consuming, which seriously affects the continuity of gas utilization and emission operations. In emergency response scenarios, it is impossible to quickly reduce the local high concentration of gas, which may delay the opportunity for safe disposal. For small-volume electrical equipment, internal gas replacement before maintenance, and emergency drainage of sudden over-limit situations, such as low flow and short-term extraction scenarios, overall ventilation replacement is inefficient and lacks specificity, making it difficult to meet the actual needs of accurate and rapid concentration reduction. At the same time, the existing equipment has poor shell sealing performance and insufficient impact resistance, which cannot meet the safety protection requirements of complex underground working conditions.

[0004] To address the aforementioned issues, a gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment is proposed. Summary of the Invention

[0005] To overcome the above deficiencies, this invention provides a gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment. It aims to improve the existing buffer sealing explosion-proof device by accurately and efficiently extracting gas accumulated at the top of the equipment while ensuring the heat dissipation function of the electrical equipment, avoiding safety accidents caused by excessive concentration, and adapting to the problems of small volume, low flow and short time extraction scenarios.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment, comprising a housing, multiple mounting plates fixedly connected to the left and right sides of the housing, a top cover rotatably connected to the rear side of the housing, interfaces fixedly connected to the front and rear sides of the housing, an exhaust fan installed on the left side of the inner wall of the housing, a second protective net installed on the left side of the exhaust fan, a cooling fan installed on the right side of the inner wall of the housing, multiple magnetic strips fixedly connected to the bottom outer side of the top cover, a sealing element fixedly connected to the bottom inner side of the top cover, multiple magnetic strips fixedly connected to the top outer side of the housing, a second sealing element fixedly connected to the top inner side of the housing, multiple L-shaped rods installed on the top of the outer wall of the housing, threaded bolts threaded to the inner wall of the L-shaped rods, a handle fixedly connected to the front side of the top cover, a monitor fixedly connected to the top of the front side of the inner wall of the housing, and a controller fixedly connected to the top of the rear side of the inner wall of the housing;

[0007] Extraction components are provided on the top of both the left and right sides of the inner wall of the housing; used to extract methane gas inside the sealed explosion-proof device.

[0008] Multiple buffer components are installed on the bottom of the inner wall of the housing to reduce the vibration generated during the operation of the electromechanical equipment. A frequency converter is installed on the top right side of the buffer component, and a motor module is installed on the top left side of the buffer component.

[0009] The inner wall of the housing is equipped with wire harness assemblies on both the front and rear sides to enhance the sealing and maintenance effect of the explosion-proof device.

[0010] Protective components are installed on both the left and right sides of the outer wall of the housing to improve the ventilation and heat dissipation of the sealed explosion-proof device.

[0011] As a further description of the above technical solution:

[0012] The extraction assembly includes two mounting blocks, both of which are fixedly connected to the top of the left and right sides of the inner wall of the housing. A micro motor is fixedly connected to the rear side of the inner wall of the mounting block. A threaded rod is fixedly connected to the output end of the micro motor. A threaded block is threadedly connected to the outer wall of the threaded rod. A piston is fixedly connected to one side of each of the threaded blocks. An empty cylinder is slidably connected to the outer wall of the piston. One-way valve one and one-way valve two are respectively connected to one side of each of the empty cylinders through the two ends of an L-shaped air pipe. An extraction tube one is fixedly connected to the top of the inner wall of one-way valve one. An extraction tube two is fixedly connected to the bottom of the inner wall of one-way valve one. An exhaust pipe penetrates the inner wall of the protective net two.

[0013] As a further description of the above technical solution:

[0014] The buffer assembly includes multiple buffer seats, each fixedly connected to the four corners of the bottom of the inner wall of the housing. Multiple springs are fixedly connected to the inner wall of each buffer seat. A damping rubber block is fixedly connected to the top of each spring. A connecting plate is fixedly connected to the top of each damping rubber block. Multiple limiting blocks are fixedly connected to the front and rear sides of each buffer seat. A slider is slidably connected to the inner wall of each limiting block. A rotating rod is rotatably connected to the inner wall of each slider.

[0015] As a further description of the above technical solution:

[0016] The wire harness assembly includes two locking blocks, both of which are fixedly connected to the middle of the front and rear sides of the housing. The outer wall of each locking block is fitted with a buckle, and the bottom of the inner wall of each buckle is fixedly connected with an arc-shaped rubber block. The top of each locking block is fixedly connected with multiple telescopic rods, and the outer wall of each telescopic rod is fitted with a spring. The top of each telescopic rod is fixedly connected with a limit plate.

[0017] As a further description of the above technical solution:

[0018] The protective assembly includes two connecting blocks, both of which are fixedly connected to the front and rear sides of the outer wall of the housing. A connecting rod is slidably connected to the inner wall of the connecting block. A connecting plate is fixedly connected to the top of the connecting rod. A spring is sleeved on the outer wall of the connecting rod. A protective net is installed on the right side of the cooling fan. A scraper is attached to the right side of the outer wall of the protective net.

[0019] As a further description of the above technical solution:

[0020] Multiple threaded bolts are threadedly connected to the inner wall of the L-shaped rod and the top of the inner wall of the housing. The magnetic strip one and the magnetic strip two are magnetically connected. The outer wall of the sealing element one and the outer wall of the sealing element two are in contact with each other.

[0021] As a further description of the above technical solution:

[0022] Multiple one-way valves are fixedly connected to the inner wall of the mounting block, the exhaust pipe is fixedly connected to the inner wall of the one-way valves, the exhaust pipe passes through the inner wall of the mounting block, multiple threaded blocks are slidably connected to the inner wall of the mounting block, and two threaded rods are rotatably connected to the front side of the mounting block.

[0023] As a further description of the above technical solution:

[0024] Multiple rotating rods are rotatably connected to the four bottom corners of the connecting plate, and multiple damping rubber blocks are slidably connected to the inner wall of the buffer seat.

[0025] As a further description of the above technical solution:

[0026] Both of the limiting plates are slidably connected to the inner wall of the block, and the bottoms of the two arc-shaped rubber blocks are respectively attached to the tops of the two limiting plates. The two ends of the multiple springs are connected to the bottom of the limiting plates and the top of the block.

[0027] As a further description of the above technical solution:

[0028] The protective net is installed on the right side of the inner wall of the shell, and the two scrapers are fixedly connected to the bottom of multiple connecting rods.

[0029] The present invention has the following beneficial effects:

[0030] 1. In this invention, the extraction component can accurately and efficiently extract gas from the inside of the buffer sealing explosion-proof device, eliminating the risk of explosion. By setting the extraction component on the top of the left and right sides of the inner wall of the shell, a micro motor drives the threaded rod to rotate, causing the threaded block and piston to slide back and forth in the empty cylinder. Combined with the directional control of one-way valve one and one-way valve two, the extraction pipe one and extraction pipe two are precisely aligned with the gas accumulation area on the top of the device and around the electromechanical equipment, realizing directional, low-flow, short-time, and efficient extraction. This can quickly reduce the local gas concentration, ensuring the smoothness of gas emission and preventing external coal dust and other impurities from entering the exhaust pipe through the protective net two, ensuring the long-term stable operation of the extraction component.

[0031] 2. In this invention, the buffer assembly can effectively buffer and reduce vibration, ensuring the long-term stable operation of the buffer sealing explosion-proof device. The buffer assembly, through the synergistic effect of the spring and damping rubber block in the buffer seat, can significantly reduce the vertical vibration generated during the operation of the electromechanical equipment. The combined design of the damping rubber block and the spring has both elastic buffering and damping vibration reduction functions, which can adapt to the vibration of different frequencies and amplitudes of the underground electromechanical equipment, ensuring that the equipment operates in a stable environment and reducing the risk of failure such as component loosening and seal failure caused by vibration.

[0032] 2. In this invention, the cable harness assembly optimizes sealing and maintenance, improving the reliability of the buffer sealing explosion-proof device. The cable harness assembly, through the snap-fit ​​of buckles and blocks, combined with the arc-shaped rubber block to wrap and fix the cable, avoids the messy cable arrangement from affecting the internal airflow of the device, enhances the sealing performance of the buffer sealing explosion-proof device, and reduces the probability of gas seeping in through cable gaps. At the same time, the detachable design of the buckles facilitates the inspection and replacement of the cable, improving the maintenance convenience of the buffer sealing explosion-proof device. The top cover and the shell are connected by magnetic attraction strip one and magnetic attraction strip two, and sealed by sealing element one and sealing element two, achieving a double sealing effect. This not only ensures the sealing reliability of the buffer sealing explosion-proof device, but also facilitates the opening and closing of the top cover, improving equipment maintenance efficiency.

[0033] 4. In this invention, the protective components can enhance ventilation and heat dissipation, taking into account both protection and heat dissipation needs. Protective net one and protective net two respectively protect the cooling fan and exhaust fan, preventing external impurities from entering the device and protecting the core components from damage. The bidirectional cooperation between the cooling fan and exhaust fan, combined with the protective components, enables the cleaning and maintenance of the heat dissipation channels.

[0034] 5. In this invention, intelligent monitoring and response enhance the safety protection level. The monitor inside the shell of the buffer sealing explosion-proof device can monitor the gas concentration in real time. When the concentration approaches the warning threshold, the controller automatically starts the extraction component and exhaust fan to achieve rapid gas extraction without manual intervention, improving the timeliness and accuracy of emergency response. At the same time, the controller can coordinate the operation status of the cooling fan and extraction component to ensure that the normal heat dissipation of the equipment is not affected during the gas extraction process, thus ensuring the safety and stability of the buffer sealing explosion-proof device. Attached Figure Description

[0035] Figure 1 This is a perspective view of the housing of the gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment proposed in this invention.

[0036] Figure 2 This is a schematic diagram of the top cover structure of the gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment proposed in this invention.

[0037] Figure 3 This is a schematic cross-sectional view of the threaded rod portion of the gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment proposed in this invention.

[0038] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0039] Figure 5 This is a schematic cross-sectional view of the mounting block of the gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment proposed in this invention.

[0040] Figure 6 for Figure 5 Enlarged view at point B in the middle;

[0041] Figure 7 This is a schematic diagram of the cross-sectional structure of the threaded bolt of the gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment proposed in this invention.

[0042] Figure 8 This is a schematic diagram of the two-section structure of the sealing element of the gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment proposed in this invention.

[0043] Figure 9 for Figure 8 Enlarged view at point C;

[0044] Figure 10 This is a schematic diagram of the connecting block structure of the gas sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment proposed in this invention.

[0045] Figure 11 for Figure 10 Enlarged view at point D;

[0046] Figure 12 This is a schematic diagram of the explosion structure of the connecting rod of the gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment proposed in this invention.

[0047] Figure 13 This is a schematic diagram of the motor module structure of the gas sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment proposed in this invention.

[0048] Legend:

[0049] 1. Housing; 2. Mounting plate; 3. Top cover; 4. Interface; 5. Extraction assembly; 501. Mounting block; 502. Micro motor; 503. Threaded rod; 504. Threaded block; 505. Piston; 506. Empty cylinder; 507. One-way valve 1; 508. One-way valve 2; 509. Extraction tube 1; 510. Extraction tube 2; 511. Exhaust pipe; 6. Buffer assembly; 601. Buffer seat; 602. Spring 1; 603. Damping rubber block; 604. Limiting block; 605. Slider; 606. Rotating rod; 607. Connecting plate 1; 7. Cable harness assembly; 701. Buckle; 7 02. Locking block; 703. Arc-shaped rubber block; 704. Telescopic rod; 705. Spring II; 706. Limiting plate; 8. Protective components; 801. Connecting block; 802. Protective net I; 803. Connecting rod; 804. Spring III; 805. Scraper; 806. Connecting plate II; 9. Protective net II; 10. Handle; 11. Threaded bolt; 12. L-shaped rod; 13. Magnetic strip I; 14. Magnetic strip II; 15. Seal I; 16. Seal II; 17. Frequency converter; 18. Motor module; 19. Cooling fan; 20. Controller; 21. Monitor; 22. Exhaust fan. Detailed Implementation

[0050] 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.

[0051] Reference Figure 1-13An embodiment of the present invention provides a gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment, comprising a housing 1, multiple mounting plates 2 fixedly connected to both the left and right sides of the housing 1, a top cover 3 rotatably connected to the rear side of the housing 1, interfaces 4 fixedly connected to both the front and rear sides of the housing 1, an exhaust fan 22 installed on the left side of the inner wall of the housing 1, a protective net 9 installed on the left side of the exhaust fan 22, a cooling fan 19 installed on the right side of the inner wall of the housing 1, multiple magnetic strips 13 fixedly connected to the bottom outer side of the top cover 3, a sealing element 15 fixedly connected to the bottom inner side of the top cover 3, and multiple magnetic strips 14 fixedly connected to the top outer side of the housing 1. A sealing element 16 is fixedly connected to the inner top of the housing 1. Multiple L-shaped rods 12 are installed on the top of the outer wall of the housing 1, and threaded bolts 11 are threaded onto the inner wall of each L-shaped rod 12. A handle 10 is fixedly connected to the front of the top cover 3. A monitor 21 is fixedly connected to the top of the front inner wall of the housing 1. A controller 20 is fixedly connected to the top of the rear inner wall of the housing 1. Extraction components 5 are installed on the top of both the left and right sides of the inner wall of the housing 1; these are used to extract methane gas from inside the sealed explosion-proof device. Multiple buffer components 6 are installed at the bottom of the inner wall of the housing 1 to reduce vibrations generated during the operation of the electromechanical equipment. A variable... The frequency converter 17 and the buffer assembly 6 have a motor module 18 installed on the top left side; the inner walls of the housing 1 are equipped with cable assemblies 7 on both the front and rear sides to enhance the sealing and maintenance effect of the explosion-proof device; the outer walls of the housing 1 are equipped with protective assemblies 8 on both the left and right sides to improve the ventilation and heat dissipation effect of the explosion-proof device. This design is to ensure the structural strength of the housing 1, which is made of wear-resistant alloy steel outer layer and flame-retardant insulating inner layer, in the complex environment of the mine. The top cover 3 is connected to the rear of the housing 1 by a hinge for easy equipment maintenance. The interfaces 4 on the front and rear sides are sealed plugs to accommodate cables of different specifications. The protective mesh 9 is double-layered. Stainless steel mesh prevents foreign objects from entering. The cooling fan 19 and the exhaust fan 22 form convection ventilation, greatly improving heat dissipation efficiency. Magnetic strip 13 and magnetic strip 24 are made of neodymium iron boron material, and together with seal 15 and seal 26 made of silicone, they achieve double sealing of the explosion-proof device. Three L-shaped rods 12 are evenly distributed on the top of the housing 1. The threaded bolts 11 are stainless steel bolts. After tightening, the gap between the top cover 3 and the housing 1 is closed. The monitor 21 uses an infrared gas sensor to ensure that the protection mechanism is quickly activated when the gas concentration exceeds the standard. The explosion-proof device structure takes into account sealing, heat dissipation and monitoring and early warning, providing a basic guarantee for the operation of subsequent components.

[0052] The extraction component 5 includes two mounting blocks 501, both of which are fixedly connected to the top of the left and right sides of the inner wall of the housing 1. A micro motor 502 is fixedly connected to the rear side of the inner wall of the mounting block 501. A threaded rod 503 is fixedly connected to the output end of the micro motor 502. A threaded block 504 is threadedly connected to the outer wall of the threaded rod 503. A piston 505 is fixedly connected to the adjacent side of the multiple threaded blocks 504. An empty cylinder 506 is slidably connected to the outer wall of the piston 505. One-way valve 507 and one-way valve 508 are respectively connected to the adjacent side of the multiple empty cylinders 506 through the two ends of the L-shaped air pipe. An extraction tube 509 is fixedly connected to the top of the inner wall of one-way valve 507, and an extraction tube 510 is fixedly connected to the bottom of the inner wall of one-way valve 507. An exhaust pipe 511 penetrates the inner wall of the protective net 9. This design allows the mounting block 501 to be fixed to the top of the inner wall of the housing 1, precisely aligning with the gas accumulation area at the top of the housing 1. The micro motor 502 drives the threaded rod 503 to reciprocate smoothly. The piston 505 is made of fluororubber and has excellent sealing performance with the empty cylinder 506. The one-way valve 507 and the one-way valve 508 are spring-loaded one-way valves, which facilitates the prevention of gas backflow during extraction and discharge. The extraction pipe 509 has its opening at a distance from the bottom of the top cover 3, while the extraction pipe 510 has its opening close to the top of the motor module 18, achieving precise capture of gas at the top and around the equipment. The exhaust pipe 511 and the exhaust fan 22 form an airflow synergy. For small-volume equipment and emergency scenarios, it can reduce the gas concentration from the lower limit of the explosion limit to the safe threshold in a short time, solving the problem of poor targeting of existing overall ventilation.

[0053] The buffer assembly 6 includes multiple buffer seats 601, all of which are fixedly connected to the four bottom corners of the inner wall of the housing 1. Multiple springs 602 are fixedly connected to the inner wall of each buffer seat 601. A damping rubber block 603 is fixedly connected to the top of each spring 602, and a connecting plate 607 is fixedly connected to the top of each damping rubber block 603. Multiple limiting blocks 604 are fixedly connected to the front and rear sides of each buffer seat 601. A slider 605 is slidably connected to the inner wall of each limiting block 604, and a rotating rod 606 is rotatably connected to the inner wall of each slider 605. This design allows the four buffer seats 601 to be distributed across the housing. At the four corners of the bottom of the inner wall, spring 602 and damping rubber block 603 combine elasticity and damping characteristics. Connecting plate 607 is used to support the frequency converter 17 and motor module 18. The sliding block 605 and limit block 604 have a clearance. At the same time, the two ends of the rotating rod 606 are connected to the sliding block 605 and connecting plate 607 through bearings. When the equipment generates vibration amplitude during operation, spring 602 and damping rubber block 603 absorb vertical vibration energy. The rotating rod 606 drives the sliding block 605 to slide horizontally, converting the remaining vibration into horizontal displacement, avoiding vibration that could cause the seals to loosen and gas to leak, and extending the service life of the device.

[0054] The cable harness assembly 7 includes two locking blocks 702, both of which are fixedly connected to the middle of the front and rear sides of the housing 1. A buckle 701 is attached to the outer wall of each locking block 702, and an arc-shaped rubber block 703 is fixedly connected to the bottom of the inner wall of each buckle 701. Multiple telescopic rods 704 are fixedly connected to the top of each locking block 702. A spring 705 is sleeved on the outer wall of each telescopic rod 704, and a limit plate 706 is fixedly connected to the top of each telescopic rod 704. This design ensures that the locking blocks 702 are symmetrically fixed to the front of the housing 1. At the rear two sides, the buckle 701 and the buckle block 702 are connected by a buckle, which is convenient for maintenance. The arc-shaped rubber block 703 is adapted to the outer diameter of the cable for different specifications, tightly wrapping the cable and reducing gaps. When the cable passes through the interface 4, the buckle 701 is snapped onto the buckle block 702. The arc-shaped rubber block 703 presses against the limiting plate 706. The spring 705 is compressed to generate elastic force, which makes the limiting plate 706 press the cable tightly, enhancing the sealing effect. At the same time, it prevents the cable from being messy and affecting the internal airflow, and improves the efficiency of cable management during maintenance.

[0055] The protective component 8 includes two connecting blocks 801, both of which are fixedly connected to the front and rear sides of the outer wall of the housing 1. A connecting rod 803 is slidably connected to the inner wall of each connecting block 801. A connecting plate 806 is fixedly connected to the top of each connecting rod 803. A spring 804 is sleeved on the outer wall of the connecting rod 803. A protective mesh 802 is installed on the right side of the cooling fan 19. A scraper 805 is attached to the right side of the outer wall of the protective mesh 802. This design allows the connecting blocks 801 to be installed on the front and rear sides of the outer wall of the housing 1, positioned above and below the cooling fan 19. The connecting rod 803 and the connecting plate 804 are connected to the protective component 805. The fitting gap of the connecting block 801 is small, the connecting plate 806 is convenient for manual operation, the scraper 805 is tightly attached to the protective net 802, and the distance between the protective net 802 and the cooling fan 19 is small. When the thickness of the protective net 802 with coal dust and gas mixture affects the heat dissipation effect, the connecting plate 806 is pressed down, and the connecting rod 803 drives the scraper 805 to slide along the surface of the protective net 802 to avoid blockage of the heat dissipation channel. The protective net 802 and the protective net 9 prevent external impurities from entering the equipment. Together with the cooling fan 19 and the exhaust fan 22, both protection and heat dissipation needs are taken into account.

[0056] Multiple threaded bolts 11 are threadedly connected to the inner wall of the L-shaped rod 12 and the top of the inner wall of the housing 1. The magnetic strip 13 and the magnetic strip 14 are magnetically connected. The outer wall of the sealing element 15 and the outer wall of the sealing element 16 are in close contact with each other. This design is to ensure that the threaded bolts 11 are evenly distributed on the top of the housing 1, and at the same time, the L-shaped rod 12 is threadedly connected to the top of the inner wall of the housing 1, ensuring that the clamping force of the L-shaped rod 12 on the top cover 3 is uniform. The fastening effect of the threaded bolts 11 and the adsorption effect of the magnetic strips are superimposed, so that the sealing element 15 and the sealing element 16 are tightly fitted, which not only ensures the reliability of the seal, but also reduces the difficulty of opening and closing the top cover 3 by magnetic assistance, and improves the convenience of maintenance.

[0057] Multiple one-way valves 508 are fixedly connected to the inner wall of mounting block 501. Exhaust pipe 511 is fixedly connected to the inner wall of one-way valves 508 and passes through the inner wall of mounting block 501. Multiple threaded blocks 504 are slidably connected to the inner wall of mounting block 501. Two threaded rods 503 are rotatably connected to the front side of mounting block 501. This design allows one-way valves 508 to be fixed to the inner wall of mounting block 501 by threads. The connection to the L-shaped gas pipe uses a compression fitting to prevent gas leakage. The exhaust pipe 511 penetrates the inner wall of the mounting block 501 to ensure smooth gas discharge. The threaded block 504 cooperates with the guide groove on the inner wall of the mounting block 501, thereby driving the piston 505 to reciprocate in a straight line. The threaded rod 503 is rotatably connected to the front side of the mounting block 501 through a deep groove ball bearing to ensure smooth drive of the micro motor 502, thereby improving the operational stability of the extraction component 5. There is no leakage or jamming during the gas extraction process, and the directional extraction efficiency is stable, making it suitable for low-flow, short-time extraction scenarios.

[0058] Multiple rotating rods 606 are rotatably connected to the four bottom corners of the connecting plate 607, and multiple damping rubber blocks 603 are slidably connected to the inner wall of the buffer seat 601. This design is to ensure the service life of the rotating rods 606 in long-term vibration environment by rotating them to the four bottom corners of the connecting plate 607 through needle roller bearings. When the electromechanical equipment vibrates, the damping rubber blocks 603 slide up and down in the buffer seat 601, and the spring 602 compresses and rebounds to absorb vibration energy, effectively protecting the explosion-proof structure from vibration damage and ensuring long-term stable sealing performance.

[0059] Both limiting plates 706 are slidably connected to the inner wall of the locking block 702. The bottoms of the two arc-shaped rubber blocks 703 are respectively attached to the tops of the two limiting plates 706. The two ends of multiple springs 705 are connected to the bottom of the limiting plates 706 and the top of the locking block 702. This design allows the limiting plates 706 to slide on the inner wall of the locking block 702 via grooves, ensuring the vertical lifting and lowering of the limiting plates 706. The contact surfaces between the bottom of the arc-shaped rubber blocks 703 and the top of the limiting plates 706 are polished to ensure even pressure distribution during pressing. The arc-shaped rubber blocks 703 press against the limiting plates 706, compressing the springs 705 to ensure no gaps between the cable and the interface 4, preventing gas from seeping in through cable gaps. At the same time, the elasticity of the springs 705 adapts to cables of different diameters, improving the versatility of the cable harness assembly 7.

[0060] The protective net 802 is installed on the right side of the inner wall of the housing 1. Both scrapers 805 are fixedly connected to the bottom of multiple connecting rods 803. This design is to prevent the protective net 802 from loosening due to vibration by installing and fixing it on the right side of the inner wall of the housing 1. The scrapers 805 are fixedly installed on the bottom of the connecting rods 803, and the scrapers 805 and the protective net 802 are tightly fitted together. The protective net 802 effectively blocks external coal dust, stones and other impurities from entering the interior of the housing 1, avoids damage to the cooling fan 19 and the exhaust fan 22, and ensures the long-term stable operation of the ventilation and heat dissipation system.

[0061] Working Principle: During installation, the buffer sealing explosion-proof device is fixed to the designated support in the mine using bolts via the mounting plates 2 on both sides of the housing 1, ensuring stable operation. The top cover 3 is opened, and the magnetic strips 13 and 14 are pulled apart using the handle 10, allowing the inverter 17, motor module 18, and other electromechanical equipment to be fixed to the connecting plate 607 of the buffer assembly 6. The electromechanical equipment is installed in the center, with reserved space for ventilation and maintenance. The cable is then passed through the interfaces 4 on the front and rear sides of the housing 1 and connected to the coal mining equipment. The cable is then secured using the cable harness assembly 7, and the buckle 701 is engaged with the clip 702. The arc-shaped rubber block 703 on the inner wall of the buckle 701 adheres to the cable surface. Pressing the limit plate 706 causes the telescopic rod 704 to retract, and the spring 705 stores energy. The rebound force of spring 705 pushes the limiting plate 706 to press the cable, so that the gap between the cable and interface 4 is closed, blocking the channel for gas to seep in through the cable gap. When the top cover 3 is closed, the top cover 3 rotates around the rear hinge, and the magnetic strip 13 on the bottom outer side and the magnetic strip 14 on the top outer side of the housing 1 attract each other, initially fixing the top cover 3. At this time, the sealing element 15 on the bottom inner side of the top cover 3 and the sealing element 16 on the top inner side of the housing 1 are tightly fitted. Then, the threaded bolt 11 on the inner wall of the L-shaped rod 12 is tightened. The threaded bolt 11 passes through the L-shaped rod 12 and is screwed into the top of the inner wall of the housing 1, so that the L-shaped rod 12 presses the top cover 3, further increasing the fitting pressure of the sealing element 15 and the sealing element 16 to achieve double sealing, ensuring effective isolation between the inside and outside environment of the device, and exchanging gas with the outside only through the ventilation and heat dissipation channel.

[0062] During the monitoring and gas extraction coordination phase, after the buffer sealing explosion-proof device is activated, the infrared gas sensor of the monitor 21 on the top front side of the inner wall of the housing 1 monitors the internal gas concentration in real time. The monitoring data is transmitted to the controller 20 via wire. The controller 20 presets the gas warning threshold as the lower limit of the explosion limit. When the monitor 21 detects that the gas concentration is lower than the warning threshold, the buffer sealing explosion-proof device is in normal ventilation state. The cooling fan 19 on the right side of the inner wall of the housing 1 is activated to draw fresh air from outside into the device. At the same time, the exhaust fan 22 on the left side of the inner wall of the housing 1 is activated to exhaust the hot air inside the device, forming convection ventilation.

[0063] When the monitor 21 detects that the gas concentration has reached or exceeded the warning threshold, the controller 20 immediately activates the emergency response mechanism. On the one hand, it keeps the cooling fan 19 and the exhaust fan 22 running to maintain basic ventilation. On the other hand, it activates the extraction component 5 to extract the accumulated gas in a directional manner. The controller 20 sends a drive signal to the micro motor 502, which drives the threaded rod 503 to rotate. The threaded rod 503 drives the threaded block 504 to reciprocate linearly along the guide groove on the inner wall of the mounting block 501. The threaded block 504 drives the piston 505 to slide inside the empty cylinder 506. When the piston 505 moves away from the L-shaped gas pipe, a negative pressure is formed inside the empty cylinder 506, and the one-way valve 1 507 opens and the one-way valve 2 508 opens. The gas is extracted by closing the internal gas valve, and the gas is released by closing the one-way valve 507 and opening the one-way valve 508. The gas accumulated on the top of the buffer sealing explosion-proof device is extracted through the port of the extraction pipe 509, which is close to the bottom of the top cover 3. The gas around the electromechanical equipment is extracted through the port of the extraction pipe 510, which is close to the top of the motor module 18. When the piston 505 moves towards the L-shaped gas pipe, the internal pressure of the empty cylinder 506 increases, the one-way valve 507 closes and the one-way valve 508 opens, and the extracted gas is discharged to the outside of the device through the exhaust pipe 511. Together with the exhaust airflow of the exhaust fan 22, the gas diffusion is accelerated. The extraction efficiency of the extraction component 5 can avoid the explosion accident caused by the concentration exceeding the standard.

[0064] During the vibration buffering and structural protection phase, vibrations are generated when the motor module 18 operates during the operation of the electromechanical equipment. If the vibration is directly transmitted to the housing 1 and the sealing structure, it can easily lead to loosening of the seals and leakage at the interfaces, while also aggravating the wear of the electromechanical equipment components. The buffer assembly 6 weakens the impact of vibration in real time. The vibration is transmitted to the damping rubber block 603 and the rotating rod 606 at the bottom through the connecting plate 607. The damping rubber block 603 absorbs part of the vibration energy, while the spring 602 in the buffer seat 601 is compressed, converting the vibration kinetic energy into elastic potential energy, further absorbing the vibration energy. The remaining vibration energy is transmitted to the rotating rod 606 through the connecting plate 607. The rotating rod 606 rotates around the bearings at both ends, pushing the slider 605 to slide horizontally in the guide groove of the limit block 604, converting the vertical vibration into horizontal displacement, consuming the remaining vibration energy, effectively protecting the structure such as the first seal 15 and the second seal 16 from vibration damage, ensuring the long-term stability of the explosion-proof sealing performance of the buffer seal, and extending the service life of the electromechanical equipment.

[0065] During the ventilation, heat dissipation, and protection phase of the buffer seal explosion-proof device, the cooling fan 19 continuously draws in external air during operation. The air passes through the double-layer stainless steel mesh 802 on the right side of the casing 1, where impurities such as coal dust and stones are removed with a filtration efficiency of 90% before entering the buffer seal explosion-proof device. It then flows over the surface of the electromechanical equipment, absorbing the heat generated by the equipment's operation. Subsequently, under the action of the exhaust fan 22, the hot air is filtered through the second protective mesh 9 and discharged from the buffer seal explosion-proof device. After long-term operation, the surface of the first protective mesh 802 is prone to adhesion... The mixture of coal dust and gas reduces the ventilation cross-sectional area and heat dissipation efficiency. At this time, cleaning is carried out through the protective component 8. Manually press down the connecting plate 2 806 to drive the connecting rod 803 to slide down along the connecting block 801. The rubber scraper 805 at the bottom of the connecting rod 803 slides in close contact with the surface of the protective net 1 802 to scrape off the attached dust and improve cleaning efficiency. After releasing the connecting plate 2 806, the spring 3 804 rebounds, driving the connecting rod 803 and the scraper 805 to return to their original positions, completing the cleaning operation, ensuring that the heat dissipation channel is unobstructed and maintaining the heat dissipation efficiency of the device.

[0066] During the emergency response and maintenance phase of the buffer sealing explosion-proof device, when the monitor 21 detects that the gas concentration has rapidly increased to the lower limit of the explosion limit, the controller 20 immediately issues an audible and visual alarm signal and increases the alarm volume. At the same time, it increases the operating efficiency of the extraction component 5 to quickly reduce the internal gas concentration. If the concentration continues to rise, the controller 20 will trigger an emergency shutdown signal to cut off the power supply to the electromechanical equipment to prevent an explosion caused by electrical sparks. At the same time, it will continue to start the extraction component 5 and the exhaust fan 22 until the gas concentration drops below the safety standard.

[0067] During maintenance of the buffer sealing explosion-proof device, loosen the threaded bolt 11 and open the top cover 3 through the handle 10. At this time, the buckle 701 of the cable assembly 7 can be quickly disassembled, facilitating cable management and equipment maintenance. The vibration damping structure of the buffer assembly 6 prevents the bolts from loosening due to equipment vibration, reducing the frequency of maintenance. The components such as the one-way valve 507 and one-way valve 508 of the extraction assembly 5 are connected by compression fittings, making disassembly convenient and facilitating the replacement of aging parts. After maintenance, close the top cover 3 and tighten the threaded bolt 11 according to the initialization procedure to restore the operation of the buffer sealing explosion-proof device. Through the intelligent linkage between the monitor 21 and the controller 20, real-time monitoring and rapid response of gas concentration are achieved. The directional extraction of gas by the extraction assembly 5 solves the problem of gas accumulation. The vibration damping effect of the buffer assembly 6 protects the explosion-proof sealing structure. The double sealing design of the cable assembly 7 enhances the sealing performance. The synergy between the protective assembly 8 and the ventilation fan ensures heat dissipation efficiency. All components form a closed-loop protection, effectively coping with the complex working conditions in coal mines and ensuring the long-term stable operation of electrical equipment.

[0068] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment, comprising a housing (1), characterized in that: Multiple mounting plates (2) are fixedly connected to both the left and right sides of the housing (1). A top cover (3) is rotatably connected to the rear side of the housing (1). Interfaces (4) are fixedly connected to both the front and rear sides of the housing (1). An exhaust fan (22) is installed on the left side of the inner wall of the housing (1). A protective net (9) is installed on the left side of the exhaust fan (22). A cooling fan (19) is installed on the right side of the inner wall of the housing (1). Multiple magnetic strips (13) are fixedly connected to the outer bottom of the top cover (3). A dense... Seal 1 (15), multiple magnetic strips 2 (14) are fixedly connected to the top outer side of the housing (1), sealing element 2 (16) is fixedly connected to the top inner side of the housing (1), multiple L-shaped rods (12) are installed on the top of the outer wall of the housing (1), threaded bolts (11) are threadedly connected to the inner wall of the L-shaped rods (12), a handle (10) is fixedly connected to the front side of the top cover (3), a monitor (21) is fixedly connected to the top of the front side of the inner wall of the housing (1), and a controller (20) is fixedly connected to the top of the rear side of the inner wall of the housing (1). The top of the left and right sides of the inner wall of the housing (1) is provided with extraction components (5); used to extract the gas inside the sealed explosion-proof device. Multiple buffer components (6) are installed on the bottom of the inner wall of the housing (1) to reduce the vibration generated during the operation of the electromechanical equipment. A frequency converter (17) is installed on the top right side of the buffer component (6), and a motor module (18) is installed on the top left side of the buffer component (6). The inner wall of the housing (1) is equipped with wire harness assemblies (7) on both the front and rear sides to enhance the sealing and maintenance effect of the explosion-proof device. Protective components (8) are installed on both the left and right sides of the outer wall of the housing (1) to improve the ventilation and heat dissipation effect of the sealed explosion-proof device.

2. The gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment according to claim 1, characterized in that: The extraction component (5) includes two mounting blocks (501), both of which are fixedly connected to the top of the left and right sides of the inner wall of the housing (1). A micro motor (502) is fixedly connected to the rear side of the inner wall of the mounting block (501). A threaded rod (503) is fixedly connected to the output end of the micro motor (502). A threaded block (504) is threadedly connected to the outer wall of the threaded rod (503). A piston is fixedly connected to one of the adjacent sides of the multiple threaded blocks (504). 505), the outer wall of the piston (505) is slidably connected to an empty cylinder (506), and one-way valve one (507) and one-way valve two (508) are respectively connected to the two ends of the L-shaped air pipe on the near side of the multiple empty cylinders (506). The top of the inner wall of the one-way valve one (507) is fixedly connected to an extraction pipe one (509), and the bottom of the inner wall of the one-way valve one (507) is fixedly connected to an extraction pipe two (510). The inner wall of the protective net two (9) is penetrated by an exhaust pipe (511).

3. The gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment according to claim 1, characterized in that: The buffer assembly (6) includes multiple buffer seats (601), each of which is fixedly connected to the four corners of the bottom of the inner wall of the housing (1). Multiple springs (602) are fixedly connected to the inner wall of each buffer seat (601). A damping rubber block (603) is fixedly connected to the top of each spring (602). A connecting plate (607) is fixedly connected to the top of each damping rubber block (603). Multiple limiting blocks (604) are fixedly connected to the front and rear sides of the buffer seat (601). A slider (605) is slidably connected to the inner wall of each limiting block (604). A rotating rod (606) is rotatably connected to the inner wall of each slider (605).

4. The gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment according to claim 1, characterized in that: The wire harness assembly (7) includes two locking blocks (702), both of which are fixedly connected to the middle of the front and rear sides of the housing (1). The outer wall of the locking block (702) is fitted with a buckle (701), and the bottom of the inner wall of the buckle (701) is fixedly connected with an arc-shaped rubber block (703). The top of the two locking blocks (702) is fixedly connected with multiple telescopic rods (704). The outer wall of the telescopic rod (704) is fitted with a spring (705), and the top of the telescopic rod (704) is fixedly connected with a limit plate (706).

5. The gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment according to claim 1, characterized in that: The protective component (8) includes two connecting blocks (801), both of which are fixedly connected to the front and rear sides of the outer wall of the housing (1). A connecting rod (803) is slidably connected to the inner wall of the connecting block (801). A connecting plate (806) is fixedly connected to the top of the connecting rod (803). A spring (804) is sleeved on the outer wall of the connecting rod (803). A protective net (802) is installed on the right side of the cooling fan (19). A scraper (805) is attached to the right side of the outer wall of the protective net (802).

6. The gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment according to claim 1, characterized in that: Multiple threaded bolts (11) are threadedly connected to the inner wall of the L-shaped rod (12) and the top of the inner wall of the housing (1). The magnetic strip one (13) and the magnetic strip two (14) are magnetically connected. The outer wall of the sealing element one (15) and the outer wall of the sealing element two (16) are in contact with each other.

7. The gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment according to claim 2, characterized in that: Multiple one-way valves (508) are fixedly connected to the inner wall of the mounting block (501), the exhaust pipe (511) is fixedly connected to the inner wall of the one-way valve (508), the exhaust pipe (511) passes through the inner wall of the mounting block (501), multiple threaded blocks (504) are slidably connected to the inner wall of the mounting block (501), and two threaded rods (503) are rotatably connected to the front side of the mounting block (501).

8. The gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment according to claim 3, characterized in that: Multiple rotating rods (606) are rotatably connected to the four bottom corners of the connecting plate (607), and multiple damping rubber blocks (603) are slidably connected to the inner wall of the buffer seat (601).

9. The gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment according to claim 4, characterized in that: Both of the limiting plates (706) are slidably connected to the inner wall of the block (702), and the bottoms of the two arc-shaped rubber blocks (703) are respectively attached to the tops of the two limiting plates (706). The two ends of the multiple springs (705) are connected to the bottom of the limiting plate (706) and the top of the block (702).

10. The gas-sensing-based buffer sealing explosion-proof device for coal mine electromechanical equipment according to claim 5, characterized in that: The protective net (802) is installed on the right side of the inner wall of the housing (1), and the two scrapers (805) are fixedly connected to the bottom of the multiple connecting rods (803).

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