Fault self-switching double-fan gas pumping and discharging device

Abstract

The invention belongs to the technical field of coal mine well gas discharge, and particularly relates to a fault self-switching double-fan gas pumping and discharging device which comprises an integrated box body, a power pumping and discharging mechanism, an automatic switching mechanism, a power control mechanism and a fault feedback mechanism. The automatic switching mechanism is arranged on the power pumping and discharging mechanism, the power control mechanism is arranged on the power pumping and discharging mechanism, the power control mechanism is arranged in the integrated box body, and the fault feedback mechanism is arranged on the power pumping and discharging mechanism. By means of the mechanical linkage switching mechanism, when the main draught fan breaks down, the balance spring drives the auxiliary draught fan to be automatically started and stopped, seamless switching is achieved, and the gas accumulation risk is eliminated; the double fans are driven to be linked through self-adaptive power adjustment and concentration detection, high-concentration gas automatically triggers full-power operation, and manual intervention is not needed; the gas kinetic energy is used for self-power generation in a self-power-generation safety early warning fault state, triple monitoring triggers alarm, and the application limitation of a power-off scene is broken through.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas drainage in coal mines, and specifically refers to a fault self-switching dual-fan gas drainage device. Background Technique

[0002] Coal mining is a complex and high-risk operation, which involves digging coal mines underground to extract coal resources. During the mine operation, gas, as a common by-product, will penetrate into the mine interior through the coal seam. These gas contains toxic carbon monoxide, posing a serious threat to the lives of miners. In addition, components such as methane in the gas are extremely likely to cause fires and explosions when the concentration increases, posing a great challenge to the safety of mine operations.

[0003] Traditional gas drainage systems usually operate with a single main fan. Once the fan fails or needs maintenance, it must be shut down for processing, resulting in the interruption of drainage. Gas is likely to accumulate underground, triggering the risk of explosion or asphyxiation. Although some systems are equipped with standby fans, manual operation is required for switching, and the delay time is long (up to dozens of minutes), which cannot meet the emergency needs of real-time gas concentration changes.

[0004] There is a need for a dual-fan system with a fast self-switching function. When the main fan is abnormal, the standby fan can seamlessly take over the drainage task within seconds. Therefore, a fault self-switching dual-fan gas drainage device is proposed. Summary of the Invention

[0005] To solve the above existing problems, the present invention provides a fault self-switching dual-fan gas drainage device. The present invention uniquely creates a mechanical linkage switching mechanism. When the main fan fails, the balance spring drives the auxiliary fan to open and close automatically, realizing seamless switching and eliminating the risk of gas accumulation; the adaptive power adjustment concentration detection drives the dual-fan linkage. High-concentration gas automatically triggers full-power operation without manual intervention, improving the drainage efficiency; self-generated electricity safety warning generates electricity by using gas kinetic energy in the fault state, and triple monitoring (airflow / electromagnetic / mechanical) triggers an alarm, breaking through the application limitations of power-off scenarios; dual-stage sealing protection pipeline sealing + box positive pressure protection reduces the leakage rate and meets the explosion-proof requirements of high-gas mines; the mechanical self-driving architecture's core function relies on pure mechanical transmission, and no external power is required for fault switching, improving the system reliability.

[0006] The technical solution adopted by the present invention is as follows: This solution provides a fault self-switching dual-fan gas drainage device, which includes an integrated box body, a power drainage mechanism, an automatic switching mechanism, a power control mechanism, and a fault feedback mechanism. The power drainage mechanism is arranged inside the integrated box body, the automatic switching mechanism is arranged on the power drainage mechanism, the power control mechanism is arranged on the power drainage mechanism, the power control mechanism is arranged inside the integrated box body, the fault feedback mechanism is arranged on the power drainage mechanism. The automatic switching mechanism includes a fault detection mechanism and a real-time switching mechanism, both of which are arranged inside the power drainage mechanism. The power control mechanism includes a static detection mechanism and a full-power drainage mechanism. The static detection mechanism is arranged on the side wall of the power drainage mechanism, and the full-power drainage mechanism is arranged inside the power drainage mechanism.

[0007] Further, the power drainage mechanism includes a T-shaped intake pipe, an explosion-proof main fan, an explosion-proof auxiliary fan, a T-shaped exhaust pipe, and a switching box. The explosion-proof main fan and the explosion-proof auxiliary fan are fixedly arranged side by side on the bottom wall inside the integrated box body. One end of the T-shaped intake pipe penetrates and is fixedly arranged on the side wall of the integrated box body, and the other two ends of the T-shaped intake pipe are respectively fixedly connected to the air inlets of the explosion-proof main fan and the explosion-proof auxiliary fan. One end of the T-shaped exhaust pipe is fixedly penetrated and arranged on the side wall of the integrated box body, and the other two ends of the T-shaped exhaust pipe are respectively fixedly connected to the air outlets of the explosion-proof main fan and the explosion-proof auxiliary fan. The switching box is fixedly sleeved on the outer walls of the two ends of the T-shaped intake pipe connected to the explosion-proof main fan and the explosion-proof auxiliary fan.

[0008] Further, the fault detection mechanism includes a switching cavity, an induction plate, a sealing ring, a guide rod, and an induction switch. The switching cavities are arranged in pairs inside the switching box, and the two switching cavities are respectively communicated with the two ends of the T-shaped intake pipe. The induction plates are rotatably arranged in pairs on the inner walls of the switching cavities. The sealing ring is fixedly arranged on one side wall of the induction plate. One end of the guide rod is rotatably arranged on the other end side wall of the induction plate. The induction switches are fixedly arranged in pairs on the inner walls of the two switching cavities.

[0009] Further, the real-time switching mechanism includes a transmission groove, a transmission rod, an adaptation groove, an adaptation frame, a full-power spring, a slot hole, a transmission lever, and a balance spring. The adaptation groove is arranged inside the switching box. The adaptation frame is slidably arranged on the side wall of the adaptation groove. One end of the full-power spring is fixedly arranged on the bottom wall of the adaptation groove, and the other end of the full-power spring is fixedly connected to the bottom end of the adaptation frame. The transmission groove is arranged inside the switching box, and the transmission groove is communicated with the switching cavity. The transmission rod is slidably arranged on the inner wall of the transmission groove. The top end of the transmission rod is rotatably connected to one end of the guide rod. The transmission lever is rotatably arranged on the top end of the adaptation frame. The slot holes are arranged at both ends of the transmission lever. The bottom end of the transmission rod is slidably arranged on the inner wall of the slot hole. The balance springs are fixedly arranged in pairs on the bottom wall of the adaptation groove, and the two balance springs are respectively fixedly connected to the bottoms of both ends of the transmission lever.

[0010] Furthermore, the fault feedback mechanism includes an outlet detection frame, a fault wind wheel, a fault explosion-proof generator, an alarm frame, a detection electromagnet, a detection magnet, and a detection coil. The outlet detection frame is arranged on the inner wall of the T-shaped exhaust pipe. The fault wind wheel is rotatably arranged on the side wall of the outlet detection frame. The fault explosion-proof generator is fixedly arranged on the side wall of the outlet detection frame. The rotating shaft of the fault wind wheel is coaxially and fixedly connected to the power shaft of the fault explosion-proof generator. The alarm frame is fixedly arranged at the top of the outer wall of the T-shaped exhaust pipe. The detection electromagnet is fixedly arranged at the top of the inner wall of the alarm frame. The detection magnet is slidably arranged on the inner wall of the alarm frame. The detection coil is fixedly arranged on the inner wall of the alarm frame. The central axis of the detection magnet coincides with the central axis of the detection coil.

[0011] Furthermore, the static detection mechanism includes a concentration frame, a detection piston, a gas concentration detector, a detection explosion-proof servo motor, a detection half gear, a transmission gear, and a piston rod. The concentration frame is arranged on the side wall of the T-shaped intake pipe. The concentration frame penetrates the T-shaped intake pipe. The detection piston is slidably arranged on the inner wall of the concentration frame. The gas concentration detector is fixedly arranged on the inner wall of the concentration frame. The detection explosion-proof servo motor is fixedly arranged on the outer wall of the T-shaped intake pipe. The detection half gear is coaxially and fixedly arranged at the output end of the detection explosion-proof servo motor. The transmission gear is rotatably arranged on the side wall of the concentration frame. One end of the piston rod is rotatably arranged on the side wall of the detection piston, and the other end of the piston rod is rotatably connected to a position on the side wall of the transmission gear away from the rotation axis of the transmission gear.

[0012] Furthermore, the full-power exhaust mechanism includes an air vent sleeve and an air vent hydraulic device. The air vent sleeves are slidably arranged in pairs on the inner wall of the T-shaped intake pipe. One end of each pair of the air vent hydraulic devices is fixedly arranged on the inner wall of the T-shaped intake pipe, and the other end of each pair of the air vent hydraulic devices is fixedly connected to the side wall of the air vent sleeve.

[0013] Furthermore, the explosion-proof main fan, the explosion-proof auxiliary fan, the induction switch, the detection coil, the gas concentration detector, the detection explosion-proof servo motor, and the air vent hydraulic device are electrically connected to the outer wall electric control system through wires. The fault explosion-proof generator is electrically connected to the detection electromagnet through a wire.

[0014] Furthermore, the detection half gear meshes with the transmission gear, and the number of teeth on the detection half gear is half of the number of teeth on the transmission gear.

[0015] Furthermore, the diameter of the sealing ring is larger than the diameter of the T-shaped intake pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) Through an innovative automatic switching mechanism, the present invention realizes seamless switching in case of main / auxiliary fan failure. When the explosion-proof main fan is operating, the negative pressure in the T-shaped intake pipe guides the gas gas to be discharged through the main fan. When the main fan fails and shuts down, the elastic force difference of the balance spring drives the transmission lever to rotate. Through the mechanical linkage of the guide rod and the transmission rod, the induction plate on the auxiliary fan side is automatically reset and triggers the induction switch, thus starting the explosion-proof auxiliary fan. This mechanism adopts a symmetric structure design to ensure that the main / auxiliary fans can be used as backups for each other, completely solving the risk of gas accumulation caused by single-machine failure.

[0018] (2) The present invention integrates a power control mechanism to achieve intelligent coupling of gas concentration - fan power. The 1:2 tooth ratio design of the detection semi-gear and the transmission gear drives the detection piston to reciprocate periodically in the concentration frame, collecting gas samples in the T-shaped intake pipe in real time. When high-concentration gas is detected, the electronic control system automatically contracts the ventilation hydraulic device, pushing the extrusion assembly to synchronously activate the full power operation of the main / auxiliary fans. This design not only eliminates the interference of airflow pulsation on detection but also realizes the technological leap from manual regulation to adaptive regulation.

[0019] (3) The innovative fault feedback mechanism of the present invention constructs a three-level safety defense line. Airflow monitoring: Normal exhaust drives the fault wind turbine to generate electricity to maintain the suction of the detection electromagnet. Fault trigger: When the main / auxiliary fan fails or the pipeline is blocked, the electromagnet loses power, causing the detection magnet to fall. Self-generated electricity alarm: The falling magnet cuts the magnetic field of the detection coil to generate an induced current, directly driving the external alarm system. This design breaks through the limitation of traditional dependence on external power sources, forming a closed-loop safety chain of "fault self-generated electricity - instant warning - personnel evacuation".

[0020] (4) The design combines pipeline tight closed connection with secondary sealing of the integrated box. Through the double barriers of mechanical seal and box positive pressure protection, the gas leakage rate is reduced compared with traditional devices, which is especially suitable for the harsh working conditions of high-gas mines.

[0021] (5) The present invention abandons the complex electronic control system. The core switching function relies on pure mechanical linkage to achieve. The balance spring - lever mechanism can complete fault switching without external power. Combined with the self-generated electricity characteristic of the fault feedback mechanism, the whole machine can maintain the basic warning function in a fully power-off environment, and the fault-free operation time of the system is improved. Brief Description of the Drawings

[0022] Figure 1 is a three-dimensional view of a double-fan gas drainage device with automatic fault switching proposed by the present invention;

[0023] Figure 2 is a top view of the internal structure of a double-fan gas drainage device with automatic fault switching proposed by the present invention;

[0024] Figure 3Front view of the internal structure of a fault self-switching dual-fan gas drainage device proposed by the present invention;

[0025] Figure 4 Stereogram of the internal structure of a fault self-switching dual-fan gas drainage device proposed by the present invention;

[0026] Figure 5 Right partial sectional view of a fault self-switching dual-fan gas drainage device proposed by the present invention;

[0027] Figure 6 For Figure 5 Enlarged view of part A in

[0028] Figure 7 Left partial sectional view of a fault self-switching dual-fan gas drainage device proposed by the present invention;

[0029] Figure 8 For Figure 7 Enlarged view of part B in

[0030] Figure 9 Front partial sectional view of a fault self-switching dual-fan gas drainage device proposed by the present invention;

[0031] Figure 10 Stereogram of the partial section of the automatic switching mechanism proposed by the present invention;

[0032] Figure 11 Left partial sectional view of the automatic switching mechanism proposed by the present invention;

[0033] Figure 12 Schematic diagram of the internal structure of the switching box proposed by the present invention.

[0034] Among them, 1. Integrated box body, 2. Power exhaust mechanism, 3. Automatic switching mechanism, 4. Power control mechanism, 5. Fault feedback mechanism, 310. Fault detection mechanism, 320. Real-time switching mechanism, 410. Static detection mechanism, 420. Full-power exhaust mechanism, 201. T-shaped intake pipe, 202. Explosion-proof main fan, 203. Explosion-proof auxiliary fan, 204. T-shaped exhaust pipe, 205. Switching box, 311. Switching cavity, 312. Induction plate, 313. Sealing ring, 314. Guide rod, 315. Induction switch, 321. Transmission groove, 322. Transmission rod, 323. Adaptation groove, 324. Adaptation frame, 325. Full-power spring, 326. Slot hole, 327. Transmission lever, 328. Balance spring, 501. Outlet detection frame, 502. Fault wind wheel, 503. Fault explosion-proof generator, 504. Alarm frame, 505. Detection electromagnet, 506. Detection magnet, 507. Detection coil, 411. Concentration frame, 412. Detection piston, 413. Gas concentration detector, 414. Detection explosion-proof servo motor, 415. Detection half gear, 416. Transmission gear, 417. Piston rod, 421. Ventilation sleeve, 422. Ventilation hydraulic device.

[0035] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. Detailed implementation manners

[0036] In combination with the accompanying drawings, the present invention will be further described in detail.

[0037] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12As shown, the present solution provides a fault-free self-switching dual-fan gas extraction device, comprising an integrated box 1, a power extraction mechanism 2, an automatic switching mechanism 3, a power control mechanism 4 and a fault feedback mechanism 5, wherein the power extraction mechanism 2 is arranged inside the integrated box 1, the automatic switching mechanism 3 is arranged on the power extraction mechanism 2, the power control mechanism 4 is arranged on the power extraction mechanism 2, the power control mechanism 4 is arranged inside the integrated box 1, the fault feedback mechanism 5 is arranged on the power extraction mechanism 2, the automatic switching mechanism 3 comprises a fault detection mechanism 310 and a real-time switching mechanism 320, both of which are arranged inside the power extraction mechanism 2, the power control mechanism 4 comprises a static detection mechanism 410 and a full-power extraction mechanism 420, the static detection mechanism 410 is arranged on the side wall of the power extraction mechanism 2, and the full-power extraction mechanism 420 is arranged inside the power extraction mechanism 2.

[0038] Among them, the power extraction mechanism 2 includes a T-shaped air intake pipe 201, an explosion-proof main fan 202, an explosion-proof auxiliary fan 203, a T-shaped exhaust pipe 204 and a switching box 205. The explosion-proof main fan 202 and the explosion-proof auxiliary fan 203 are fixed side by side on the bottom wall inside the integrated box body 1. One end of the T-shaped air intake pipe 201 is fixedly arranged on the side wall of the integrated box body 1, and the other two ends of the T-shaped air intake pipe 201 are respectively fixedly connected to the air inlets of the explosion-proof main fan 202 and the explosion-proof auxiliary fan 203. One end of the T-shaped exhaust pipe 204 is fixedly arranged on the side wall of the integrated box body 1, and the other two ends of the T-shaped exhaust pipe 204 are respectively fixedly connected to the air outlets of the explosion-proof main fan 202 and the explosion-proof auxiliary fan 203. The switching box 205 is fixedly sleeved on the outer walls of the two ends of the T-shaped air intake pipe 201 connected to the explosion-proof main fan 202 and the explosion-proof auxiliary fan 203.

[0039] Among them, the fault detection mechanism 310 includes a switching chamber 311, a sensing plate 312, a sealing ring 313, a guide rod 314 and a sensing switch 315. The switching chambers 311 are opened in pairs in the switching box 205. The two switching chambers 311 are respectively connected to the two ends of the T-shaped intake pipe 201. The sensing plates 312 are rotatably arranged on the inner walls of the switching chambers 311 in pairs. The sealing ring 313 is fixed on one side wall of the sensing plate 312. One end of the guide rod 314 is rotatably arranged on the other side wall of the sensing plate 312. The sensing switches 315 are fixed in pairs on the inner walls of the two switching chambers 311.

[0040] Among them, the real-time switching mechanism 320 includes a transmission groove 321, a transmission rod 322, an adaptation groove 323, an adaptation frame 324, a full-power spring 325, a slot hole 326, a transmission lever 327, and a balance spring 328. The adaptation groove 323 is opened inside the switching box 205. The adaptation frame 324 is slidably arranged on the side wall of the adaptation groove 323. One end of the full-power spring 325 is fixedly arranged on the bottom wall of the adaptation groove 323, and the other end of the full-power spring 325 is fixedly connected to the bottom end of the adaptation frame 324. The transmission groove 321 is opened inside the switching box 205. The transmission groove 321 communicates with the switching cavity 311. The transmission rod 322 is slidably arranged on the inner wall of the transmission groove 321. The top end of the transmission rod 322 is rotatably connected to one end of the guide rod 314. The transmission lever 327 is rotatably arranged on the top end of the adaptation frame 324. The slot holes 326 are opened at both ends of the transmission lever 327. The bottom end of the transmission rod 322 is slidably arranged on the inner wall of the slot hole 326. The balance springs 328 are fixedly arranged in pairs on the bottom wall of the adaptation groove 323, and the two balance springs 328 are respectively fixedly connected to the bottom parts of both ends of the transmission lever 327.

[0041] Among them, the fault feedback mechanism 5 includes an outlet detection frame 501, a fault wind wheel 502, a fault explosion-proof generator 503, an alarm frame 504, a detection electromagnet 505, a detection magnet 506, and a detection coil 507. The outlet detection frame 501 is arranged on the inner wall of the T-shaped exhaust pipe 204. The fault wind wheel 502 is rotatably arranged on the side wall of the outlet detection frame 501. The fault explosion-proof generator 503 is fixedly arranged on the side wall of the outlet detection frame 501. The rotating shaft of the fault wind wheel 502 is coaxially and fixedly connected to the power shaft of the fault explosion-proof generator 503. The alarm frame 504 is fixedly arranged at the top end of the outer wall of the T-shaped exhaust pipe 204. The detection electromagnet 505 is fixedly arranged at the top end of the inner wall of the alarm frame 504. The detection magnet 506 is slidably arranged on the inner wall of the alarm frame 504. The detection coil 507 is fixedly arranged on the inner wall of the alarm frame 504. The central axis of the detection magnet 506 coincides with the central axis of the detection coil 507.

[0042] Among them, the static detection mechanism 410 includes a concentration frame 411, a detection piston 412, a gas concentration detector 413, a detection explosion-proof servo motor 414, a detection semi-gear 415, a transmission gear 416, and a piston rod 417. The concentration frame 411 is arranged on the side wall of the T-shaped intake pipe 201. The concentration frame 411 penetrates the T-shaped intake pipe 201. The detection piston 412 is slidably arranged on the inner wall of the concentration frame 411. The gas concentration detector 413 is fixedly arranged on the inner wall of the concentration frame 411. The detection explosion-proof servo motor 414 is fixedly arranged on the outer wall of the T-shaped intake pipe 201. The detection semi-gear 415 is coaxially fixedly arranged at the output end of the detection explosion-proof servo motor 414. The transmission gear 416 is rotatably arranged on the side wall of the concentration frame 411. One end of the piston rod 417 is rotatably arranged on the side wall of the detection piston 412, and the other end of the piston rod 417 is rotatably connected to the side wall of the transmission gear 416 at a position far from the rotation axis of the transmission gear 416.

[0043] Among them, the full-power exhaust mechanism 420 includes a ventilation sleeve 421 and a ventilation hydraulic device 422. The ventilation sleeves 421 are slidably arranged in pairs on the inner wall of the T-shaped intake pipe 201, and one end of each pair of the ventilation hydraulic devices 422 is fixedly arranged on the inner wall of the T-shaped intake pipe 201, and the other end of the ventilation hydraulic device 422 is fixedly connected to the side wall of the ventilation sleeve 421.

[0044] Among them, the explosion-proof main fan 202, the explosion-proof auxiliary fan 203, the induction switch 315, the detection coil 507, the gas concentration detector 413, the detection explosion-proof servo motor 414, and the ventilation hydraulic device 422 are electrically connected to the outer wall electric control system through wires, and the fault-proof explosion generator 503 is electrically connected to the detection electromagnet 505 through wires.

[0045] Among them, the detection half gear 415 meshes with the transmission gear 416, and the number of teeth on the detection half gear 415 is half of the number of teeth on the transmission gear 416.

[0046] Among them, the diameter of the sealing ring 313 is larger than the diameter of the T-shaped intake pipe 201.

[0047] During specific use, first connect the T-shaped intake pipe 201 outside the integrated box body 1 to the underground exhaust pipe, and connect the T-shaped exhaust pipe 204 outside the integrated box body 1 to an external gas treatment device. Subsequently, the user can control the operation of the explosion-proof main fan 202 through an external electronic control system (this is prior art and will not be elaborated here). A negative pressure will be generated in the T-shaped intake pipe 201, and then the gas mixture (hereinafter referred to as gas) will enter the explosion-proof main fan 202 through the T-shaped intake pipe 201 and be discharged to the external gas treatment device through the T-shaped exhaust pipe 204. When the gas passes through the switching chamber 311 communicated with the explosion-proof main fan 202, the gas will drive the induction plate 312 to rotate on the inner wall of the switching chamber 311. Through the transmission of the guide rod 314 and the transmission rod 322, one end of the transmission lever 327 on this side will move downward, thereby driving the other side of the transmission lever 327 to move upward. And through the transmission of the transmission rod 322 and the guide rod 314, the induction plate 312 will be rotated and tightly attached to the side wall of the switching chamber 311 through the sealing ring 313, and contact the induction switch 315. The balance spring 328 on one side of the explosion-proof main fan 202 will be compressed, and the balance spring 328 on one side of the explosion-proof auxiliary fan 203 will be stretched. When the explosion-proof main fan 202 is operating, a negative pressure will be generated in the T-shaped intake pipe 201. The air pressures at both ends of the induction plate 312 on one side of the explosion-proof auxiliary fan 203 are different, which will push the induction plate 312 tightly against the side wall of the switching chamber 311. When the explosion-proof main fan 202 fails and stops operating, due to the restoring force of the two balance springs 328, the balance spring 328 on one side of the explosion-proof main fan 202 will apply an upward elastic force to the transmission lever 327, and the balance spring 328 on one side of the explosion-proof auxiliary fan 203 will apply a downward elastic force to the transmission lever 327, thereby driving the transmission lever 327 to rotate. Through the transmission of the transmission rod 322 and the guide rod 314 on one side of the explosion-proof auxiliary fan 203, the induction plate 312 on this side will be driven to rotate, so that the induction switch 315 is separated from the induction plate 312, and then the explosion-proof auxiliary fan 203 is started to operate. The structures on both sides of the explosion-proof main fan 202 and the explosion-proof auxiliary fan 203 are the same. Similarly, the induction plate 312 on one side of the explosion-proof main fan 202 will be tightly attached to the inner wall of the switching chamber 311 and touch the induction switch 315 on this side, thus achieving the technical effect of automatically switching the fan in case of a failure, and effectively solving the technical problem of gas accumulation caused by fan failure;

[0048] The user can simultaneously control the operation of the detection explosion-proof servo motor 414 through an external electronic control system, thereby driving the rotation of the detection semi-gear 415 and simultaneously driving the rotation of the transmission gear 416. Since the number of teeth of the detection semi-gear 415 is half that of the transmission gear 416, when the detection semi-gear 415 rotates normally, the transmission gear 416 rotates half a turn, pauses for a while, and then rotates half a turn, cycling in turn. The detection piston 412 is driven by the piston rod 417 to reciprocate inside the inner wall of the concentration rack 411, thereby driving the gas in the T-shaped intake pipe 201 to be brought into the inner wall of the concentration rack 411 through the notch of the detection piston 412, and the gas concentration in the T-shaped intake pipe 201 is detected by the gas concentration detector 413. When the gas concentration detected by the gas concentration detector 413 is too high, the ventilation hydraulic device 422 will be controlled to contract through the external electronic control system, thereby driving the ventilation sleeve 421 to slide on the inner wall of the T-shaped intake pipe 201 towards the induction plate 312, thereby driving the rotation of the two-sided induction plate 312, and squeezing the transmission lever 327 and the adaptation rack 324 downward through the two-sided guide rod 314 and the transmission rod 322, and driving the adaptation rack 324 to slide downward on the side wall of the adaptation groove 323, thereby squeezing the full-power spring 325, and at the same time causing the two-sided induction plate 312 to be disengaged from the induction switch 315, thereby simultaneously starting the explosion-proof main fan 202 and the explosion-proof auxiliary fan 203 to work simultaneously, thereby increasing the discharge of gas, achieving the technical effect of increasing the pumping and exhausting force according to the gas concentration, and effectively solving the technical problem of manual intervention for power adjustment in the prior art;

[0049] When the device is operating normally, the gas is discharged outward from the T-shaped exhaust pipe 204, thereby driving the rotation of the fault wind wheel 502, and then driving the operation of the fault explosion-proof generator 503. The generated current will be transmitted to the detection electromagnet 505, so that the detection electromagnet 505 and the detection magnet 506 are in contact through magnetic force. When the pipeline is blocked or the explosion-proof main fan 202 and the explosion-proof auxiliary fan 203 fail simultaneously, the fault wind wheel 502 will have no gas to push, so that the fault explosion-proof generator 503 stops working, so that the detection electromagnet 505 loses its magnetic force, and the detection magnet 506 will move downward under the action of its own gravity and pass through the detection coil 507. Due to the principle of electromagnetic induction, the detection coil 507 will generate current and output it externally, thereby starting an external alarm to evacuate the crowd, achieving the technical effect of dealing with faults caused by the entire circuit, effectively solving the safety hazard caused by the malfunction of the device in the prior art, and adding a double insurance for the operation of the device.

[0050] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0051] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention. The actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design, without creative efforts, structural manners and embodiments similar to the technical solution without departing from the gist of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A fault-free self-switching dual-fan gas extraction device, characterized in that: The invention comprises an integrated box (1), a power extraction mechanism (2), an automatic switching mechanism (3), a power control mechanism (4) and a fault feedback mechanism (5), wherein the power extraction mechanism (2) is arranged inside the integrated box (1), the automatic switching mechanism (3) is arranged on the power extraction mechanism (2), the power control mechanism (4) is arranged on the power extraction mechanism (2), the power control mechanism (4) is arranged inside the integrated box (1), the fault feedback mechanism (5) is arranged on the power extraction mechanism (2), and the The automatic switching mechanism (3) comprises a fault detection mechanism (310) and a real-time switching mechanism (320), and the fault detection mechanism (310) and the real-time switching mechanism (320) are both arranged inside the power pumping mechanism (2). The power control mechanism (4) comprises a static detection mechanism (410) and a full-power pumping mechanism (420), and the static detection mechanism (410) is arranged on a side wall of the power pumping mechanism (2), and the full-power pumping mechanism (420) is arranged inside the power pumping mechanism (2).

2. A fault-free self-switching dual-fan gas extraction device according to claim 1, characterized in that: The power extraction mechanism (2) comprises a T-shaped air intake pipe (201), an explosion-proof main fan (202), an explosion-proof auxiliary fan (203), a T-shaped exhaust pipe (204) and a switching box (205); the explosion-proof main fan (202) and the explosion-proof auxiliary fan (203) are fixedly arranged side by side on the inner bottom wall of the integrated box (1); one end of the T-shaped air intake pipe (201) penetrates and is fixedly arranged on the side wall of the integrated box (1); the other two ends of the T-shaped air intake pipe (201) are respectively connected to the explosion-proof The air inlets of the main fan (202) and the explosion-proof auxiliary fan (203) are fixedly connected; one end of the T-shaped exhaust pipe (204) is fixedly penetrated through the side wall of the integrated box body (1); the other two ends of the T-shaped exhaust pipe (204) are respectively fixedly connected to the air outlets of the explosion-proof main fan (202) and the explosion-proof auxiliary fan (203); and the switching box (205) is fixedly sleeved on the outer walls of the two ends of the T-shaped air inlet pipe (201) connected to the explosion-proof main fan (202) and the explosion-proof auxiliary fan (203).

3. A fault-free self-switching dual-fan gas extraction device according to claim 2, characterized in that: The fault detection mechanism (310) comprises a switching chamber (311), a sensing plate (312), a sealing ring (313), a guide rod (314) and a sensing switch (315). The switching chambers (311) are provided in pairs in the switching box (205). The two switching chambers (311) are respectively connected to two ends of the T-shaped air intake pipe (201). The sensing plates (312) are rotatably arranged on the inner wall of the switching chamber (311) in pairs. The sealing ring (313) is fixedly arranged on one side wall of the sensing plate (312). One end of the guide rod (314) is rotatably arranged on the other side wall of the sensing plate (312). The sensing switches (315) are fixedly arranged on the inner walls of the two switching chambers (311) in pairs.

4. A fault-free self-switching dual-fan gas extraction device according to claim 3, characterized in that: The real-time switching mechanism (320) comprises a transmission slot (321), a transmission rod (322), an adapting slot (323), an adapting frame (324), a full-power spring (325), a slot hole (326), a transmission lever (327) and a balance spring (328); the adapting slot (323) is arranged inside the switching box (205); the adapting frame (324) is slidably arranged on a side wall of the adapting slot (323); one end of the full-power spring (325) is fixedly arranged on a bottom wall of the adapting slot (323); the other end of the full-power spring (325) is fixedly connected to the bottom end of the adapting frame (324); the transmission slot (321) is arranged on the switching box (205); 5) inside, the transmission groove (321) is communicated with the switching chamber (311), the transmission rod (322) is slidably arranged on the inner wall of the transmission groove (321), the top end of the transmission rod (322) is rotatably connected to one end of the guide rod (314), the transmission lever (327) is rotatably arranged on the top end of the adaptation frame (324), the slot holes (326) are opened at both ends of the transmission lever (327), the bottom end of the transmission rod (322) is slidably arranged on the inner wall of the slot hole (326), the balance springs (328) are fixedly arranged in pairs on the bottom wall of the adaptation groove (323), and the two balance springs (328) are respectively fixedly connected to the bottoms of both ends of the transmission lever (327).

5. A fault-free self-switching dual-fan gas extraction device according to claim 4, characterized in that: The fault feedback mechanism (5) comprises an outlet detection frame (501), a fault wind wheel (502), a fault explosion prevention motor (503), an alarm frame (504), a detection electromagnet (505), a detection magnet (506) and a detection coil (507); the outlet detection frame (501) is arranged on the inner wall of the T-shaped exhaust pipe (204); the fault wind wheel (502) is rotatably arranged on the side wall of the outlet detection frame (501); the fault explosion prevention motor (503) is fixedly arranged on the side wall of the outlet detection frame (501); The rotating shaft of the faulty wind wheel (502) is coaxially fixedly connected with the power shaft of the faulty explosion-proof motor (503); the alarm frame (504) is fixedly arranged at the top of the outer wall of the T-shaped exhaust pipe (204); the detection electromagnet (505) is fixedly arranged at the top of the inner wall of the alarm frame (504); the detection magnet (506) is slidably arranged on the inner wall of the alarm frame (504); the detection coil (507) is fixedly arranged on the inner wall of the alarm frame (504); and the central axis of the detection magnet (506) coincides with the central axis of the detection coil (507).

6. A fault-free self-switching dual-fan gas extraction device according to claim 5, characterized in that: The static detection mechanism (410) comprises a concentration frame (411), a detection piston (412), a gas concentration detector (413), a detection explosion-proof servo motor (414), a detection half gear (415), a transmission gear (416) and a piston rod (417); the concentration frame (411) is arranged on a side wall of the T-shaped air intake pipe (201); the concentration frame (411) penetrates the T-shaped air intake pipe (201); the detection piston (412) is slidably arranged on an inner wall of the concentration frame (411); the gas concentration detector (413) is fixed to the inner wall of the concentration frame (411); The detection explosion-proof servo motor (414) is fixedly arranged on the inner wall of the concentration frame (411), the detection half gear (415) is coaxially fixedly arranged on the output end of the detection explosion-proof servo motor (414), the transmission gear (416) is rotatably arranged on the side wall of the concentration frame (411), one end of the piston rod (417) is rotatably arranged on the side wall of the detection piston (412), and the other end of the piston rod (417) is rotatably connected to the side wall of the transmission gear (416) away from the rotation axis of the transmission gear (416).

7. A fault-free self-switching dual-fan gas extraction device according to claim 6, characterized in that: The full-power extraction mechanism (420) comprises a ventilation sleeve (421) and a ventilation hydraulic device (422), wherein the ventilation sleeves (421) are slidably arranged in pairs on the inner wall of the T-shaped air intake pipe (201), and the ventilation hydraulic devices (422) are fixedly arranged at one end on the inner wall of the T-shaped air intake pipe (201) in pairs, and the other end of the ventilation hydraulic devices (422) is fixedly connected to the side wall of the ventilation sleeve (421).

8. A fault-free self-switching dual-fan gas extraction device according to claim 7, characterized in that: The explosion-proof main fan (202), the explosion-proof auxiliary fan (203), the induction switch (315), the detection coil (507), the gas concentration detector (413), the detection explosion-proof servo motor (414) and the ventilation hydraulic device (422) are electrically connected to the outer wall electric control system through wires, and the fault explosion-proof motor (503) is electrically connected to the detection electromagnet (505) through wires.

9. A fault-free self-switching dual-fan gas extraction device according to claim 8, characterized in that: The detection half gear (415) meshes with the transmission gear (416), and the number of teeth on the detection half gear (415) is half the number of teeth on the transmission gear (416).

10. A fault-free self-switching dual-fan gas extraction device according to claim 9, characterized in that: The diameter of the sealing ring (313) is greater than the diameter of the T-shaped air intake pipe (201).

Images