A fault-self-switching dual-fan gas extraction device

Abstract

The present invention belongs to the technical field of coal mine gas emission, and specifically refers to a fault-sensitive self-switching dual-fan gas extraction device, comprising an integrated box, a power extraction mechanism, an automatic switching mechanism, a power control mechanism, and a fault feedback mechanism, wherein the power extraction mechanism is arranged inside the integrated box, the automatic switching mechanism is arranged on the power extraction mechanism, the power control mechanism is arranged on the power extraction mechanism, the power control mechanism is arranged inside the integrated box, and the fault feedback mechanism is arranged on the power extraction mechanism. The present invention utilizes a mechanical linkage switching mechanism, and when the main fan fails, the balancing spring drives the auxiliary fan to automatically open and close, achieving seamless switching and eliminating the risk of gas accumulation; adaptive power adjustment concentration detection drives the dual fans to be linked, and high-concentration gas automatically triggers full-power operation without manual intervention; self-generation safety warning utilizes gas kinetic energy to generate electricity in the fault state, and triple monitoring triggers an alarm, breaking through the application limitations of power outage scenarios.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine gas emission, and in particular relates to a fault self-switching dual-fan gas extraction device. Background Art

[0002] Coal mining is a complex and high-risk operation that involves excavating underground mines to extract coal resources. During mining operations, methane, a common byproduct, can penetrate the coal seams and enter the mine. This methane contains toxic carbon monoxide, posing a serious threat to miners' lives. Furthermore, methane and other components in methane, when present in high concentrations, can easily cause fires and explosions, posing a significant challenge to mine safety.

[0003] Traditional gas extraction systems typically operate with a single main blower. Failure or maintenance of this blower necessitates system downtime, resulting in interrupted extraction. Gas can easily accumulate underground, posing explosion or suffocation risks. While some systems are equipped with backup blowers, these require manual switching, resulting in long delays (potentially tens of minutes), making them unable to meet the emergency needs of real-time changes in gas concentration.

[0004] A dual-fan system with a fast self-switching function is now needed. When the main fan is abnormal, the backup fan can seamlessly take over the extraction task within seconds. Therefore, a fault-proof self-switching dual-fan gas extraction device is proposed. Summary of the Invention

[0005] In order to solve the above-mentioned existing problems, the present invention provides a fault-switching dual-fan gas extraction device. The present invention has an original mechanical linkage switching mechanism. When the main fan fails, the balancing spring drives the auxiliary fan to automatically open and close, realizing seamless switching and eliminating the risk of gas accumulation; the adaptive power adjustment concentration detection drives the dual fans to be linked, and high-concentration gas automatically triggers full-power operation without manual intervention, thereby improving the extraction efficiency; the self-generation safety warning utilizes gas kinetic energy to generate electricity in the fault state, and triple monitoring (airflow / electromagnetic / mechanical) triggers an alarm, breaking through the application limitations of power outage scenarios; double-stage sealing protection pipeline sealing + box positive pressure protection reduces the leakage rate and meets the explosion-proof requirements of high-gas mines; the core function of the mechanical self-drive architecture relies on pure mechanical transmission, and fault switching does not require external power, thereby improving system reliability.

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

[0007] Furthermore, the power extraction and exhaust mechanism includes a T-shaped air 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 fixed side by side on the bottom wall inside the integrated box. One end of the T-shaped air intake pipe is fixedly provided on the side wall of the integrated box, and the other two ends of the T-shaped air 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 provided on the side wall of the integrated box, 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 at both ends of the T-shaped air intake pipe connected to the explosion-proof main fan and the explosion-proof auxiliary fan.

[0008] Furthermore, the fault detection mechanism includes a switching chamber, a sensing plate, a sealing ring, a guide rod and a sensing switch. The switching chambers are opened in pairs in the switching box, and the two switching chambers are respectively connected to the two ends of the T-shaped air intake pipe. The sensing plates are rotatably arranged on the inner wall of the switching chamber in pairs, the sealing ring is fixed on one side wall of the sensing plate, one end of the guide rod is rotatably arranged on the other side wall of the sensing plate, and the sensing switches are fixed in pairs on the inner walls of the two switching chambers.

[0009] Furthermore, 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 opened inside the switching box, and 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 opened 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, and 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, and the slot hole is opened 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 fixed in pairs on the bottom wall of the adaptation groove, and the two balance springs are respectively fixedly connected to the bottom 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 motor, 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 motor is fixedly arranged on the side wall of the outlet detection frame, the fault wind wheel rotation shaft is coaxially fixedly connected with the fault explosion-proof motor power shaft, the alarm frame is fixedly arranged on the top of the outer wall of the T-shaped exhaust pipe, the detection electromagnet is fixedly arranged on 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, and the center axis of the detection magnet coincides with the center 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 air intake pipe, the concentration frame passes through the T-shaped air intake pipe, the detection piston is slidably arranged on the inner wall of the concentration frame, the gas concentration detector is fixed on the inner wall of the concentration frame, the detection explosion-proof servo motor is fixed on the outer wall of the T-shaped air intake pipe, the detection half gear is coaxially fixed on 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 the side wall of the transmission gear away from the transmission gear rotation axis.

[0012] Furthermore, the full-power extraction mechanism includes a ventilation sleeve and a ventilation hydraulic valve, the ventilation sleeves are slidably arranged in pairs on the inner wall of the T-shaped intake pipe, the ventilation hydraulic valve is fixedly arranged at one end on the inner wall of the T-shaped intake pipe, and the other end of the ventilation hydraulic valve is fixedly connected to the side wall of the ventilation sleeve.

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

[0014] Furthermore, the detection half gear is meshed 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 air intake pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The present invention realizes seamless switching of the main / auxiliary fan failure through an innovative automatic switching mechanism. When the explosion-proof main fan is running, the negative pressure in the T-shaped air inlet pipe guides the gas to be discharged through the main fan; when the main fan stops due to a failure, the elastic difference of the balance spring drives the transmission lever to rotate. Through the mechanical linkage of the guide rod and the transmission rod, the auxiliary fan side induction plate automatically resets and triggers the induction switch, thereby starting the explosion-proof auxiliary fan. The mechanism adopts a symmetrical structural design to ensure that the main / auxiliary fans can serve as backup for each other, completely eliminating the risk of gas accumulation caused by single machine failure.

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

[0019] (3) The present invention innovates the fault feedback mechanism to build a three-level safety line: airflow monitoring: normal exhaust drives the faulty wind wheel to generate electricity, maintaining the suction of the detection electromagnet; fault triggering: when the main / auxiliary fan fails or the pipeline is blocked, the electromagnet loses power and causes the detection magnet to fall; self-generation alarm: the magnet falls and cuts the magnetic field of the detection coil to generate induced current, directly driving the external alarm system. This design breaks through the limitations of traditional reliance on external power supply and forms a closed-loop safety chain of "fault self-generation - immediate warning - personnel evacuation";

[0020] (4) The design combines tightly sealed pipe connections with integrated box secondary seals. Through the dual barriers of mechanical seals and box positive pressure protection, the gas leakage rate is lower than that of traditional devices. It is particularly suitable for the harsh working conditions of high-gas mines.

[0021] (5) The present invention abandons the complex electronic control system, and the core switching function relies on pure mechanical linkage to achieve. The balance spring-lever mechanism can complete the fault switching without external power. Combined with the self-generating characteristics of the fault feedback mechanism, the whole machine can maintain the basic warning function in a completely power-off environment, and the system's trouble-free operation time is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of a fault-proof automatic switching dual-fan gas extraction device proposed by the present invention;

[0023] Figure 2 This is a top view of the internal structure of a fault-proof automatic switching dual-fan gas extraction device proposed by the present invention;

[0024] Figure 3This is a front view of the internal structure of a fault-proof automatic switching dual-fan gas extraction device proposed by the present invention;

[0025] Figure 4 This is a three-dimensional diagram of the internal structure of a fault-proof automatic switching dual-fan gas extraction device proposed by the present invention;

[0026] Figure 5 This is a partial sectional right view of a fault-proof automatic switching dual-fan gas extraction device proposed by the present invention;

[0027] Figure 6 for Figure 5 Enlarged view of part A in the middle;

[0028] Figure 7 This is a partial sectional left view of a fault-proof automatic switching dual-fan gas extraction device proposed by the present invention;

[0029] Figure 8 for Figure 7 Enlarged view of middle part B;

[0030] Figure 9 This is a partial sectional front view of a fault-proof automatic switching dual-fan gas extraction device proposed by the present invention;

[0031] Figure 10 This is a partially cutaway perspective view of the automatic switching mechanism proposed by the present invention;

[0032] Figure 11 This is a partial sectional view from the left of the automatic switching mechanism proposed by the present invention;

[0033] Figure 12 This is a schematic diagram of the internal structure of the switch box proposed in the present invention.

[0034] Among them, 1. integrated box, 2. power extraction 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 extraction mechanism, 201. T-type air intake pipe, 202. explosion-proof main fan, 203. explosion-proof auxiliary fan, 204. T-type exhaust pipe, 205. switching box, 311. switching chamber, 312. induction plate, 313. sealing ring, 314. guide rod, 315. induction switch, 321. transmission slot, 322. transmission rod, 323. Should be slotted, 324, adaptation frame, 325, full power spring, 326, slot hole, 327, transmission lever, 328, balance spring, 501, outlet detection frame, 502, faulty wind wheel, 503, faulty explosion-proof motor, 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 valve.

[0035] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail with reference to the accompanying drawings.

[0037] like 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, this solution provides a fault-sensitive self-switching dual-fan gas extraction device, including 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. 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, and the fault feedback mechanism 5 is arranged on the power extraction mechanism 2. The automatic switching mechanism 3 includes a fault detection mechanism 310 and a real-time switching mechanism 320. The fault detection mechanism 310 and the real-time switching mechanism 320 are both arranged inside the power extraction mechanism 2. The power control mechanism 4 includes 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 and exhaust 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 1. One end of the T-shaped air intake pipe 201 is fixedly provided on the side wall of the integrated box 1, and the other two ends of the T-shaped air intake pipe 201 are fixedly connected to the air inlets of the explosion-proof main fan 202 and the explosion-proof auxiliary fan 203 respectively. One end of the T-shaped exhaust pipe 204 is fixedly provided on the side wall of the integrated box 1, and the other two ends of the T-shaped exhaust pipe 204 are fixedly connected to the air outlets of the explosion-proof main fan 202 and the explosion-proof auxiliary fan 203 respectively. 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 wall of the switching chamber 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 end 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 slot 321, a transmission rod 322, an adaptation slot 323, an adaptation frame 324, a full-power spring 325, a slot 326, a transmission lever 327 and a balance spring 328. The adaptation slot 323 is opened inside the switching box 205, the adaptation frame 324 is slidably arranged on the side wall of the adaptation slot 323, one end of the full-power spring 325 is fixedly arranged on the bottom wall of the adaptation slot 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 slot 321 is opened in the switching box Inside 205, 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 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 of the adaptation frame 324, the slots 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 326, and the balance springs 328 are fixed in pairs on the bottom wall of the adaptation groove 323, and the two balance springs 328 are respectively fixedly connected to the bottom 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 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-proof motor 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 fixedly connected with the power shaft of the fault explosion-proof motor 503, the alarm frame 504 is fixedly arranged on the top of the outer wall of the T-shaped exhaust pipe 204, the detection electromagnet 505 is fixedly arranged on 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.

[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 half 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 air inlet pipe 201, and the concentration frame 411 passes through the T-shaped air inlet pipe 201. The detection piston 412 is slidably arranged on the inner wall of the concentration frame 411. The gas concentration detector 413 is fixed on the inner wall of the concentration frame 411. The detection explosion-proof servo motor 414 is fixed on the outer wall of the T-shaped air inlet pipe 201. The detection half gear 415 is coaxially fixed 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 position of the transmission gear 416.

[0043] Among them, the full-power extraction and exhaust mechanism 420 includes a ventilation sleeve 421 and a ventilation hydraulic valve 422. 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 valve 422 is fixedly arranged at one end on the inner wall of the T-shaped air intake pipe 201, and the other end of the ventilation hydraulic valve 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 electronic control system through wires, and the fault-proof explosion-proof motor 503 is electrically connected to the detection electromagnet 505 through wires.

[0045] The detection half gear 415 is meshed 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] The diameter of the sealing ring 313 is larger than the diameter of the T-shaped air intake pipe 201 .

[0047] When in use, first connect the T-shaped air inlet pipe 201 outside the integrated box 1 to the underground exhaust pipe, and connect the T-shaped exhaust pipe 204 outside the integrated box 1 to the external gas processing device. Then the user can control the explosion-proof main fan 202 to work through the external electric control system (this is the existing technology and will not be described here). Negative pressure will be generated in the T-shaped air inlet pipe 201, and then the gas mixture (hereinafter referred to as gas) will enter the explosion-proof main fan 202 through the T-shaped air inlet pipe 201 and be discharged to the external gas processing device through the T-shaped exhaust pipe 204. When the gas passes through the switch connected to the explosion-proof main fan 202 When the switch is in the chamber 311, the gas will drive the induction plate 312 to rotate on the inner wall of the switching chamber 311, and the transmission lever 327 on this side can be moved downward through the guide rod 314 and the transmission rod 322, thereby driving the other side of the transmission lever 327 to move upward, and the induction plate 312 is rotated through the transmission rod 322 and the guide rod 314 and tightly attached to the side wall of the switching chamber 311 through the sealing ring 313, and contacts the induction switch 315, and the balance spring 328 on the side of the explosion-proof main fan 202 will be compressed, and the balance spring 328 on the side of the explosion-proof auxiliary fan 203 will be stretched. When 202 is working, negative pressure will be generated in the T-shaped air inlet pipe 201. The air pressure at both ends of the induction plate 312 on the side of the explosion-proof auxiliary fan 203 is 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 stops working due to a fault, due to the action of the two balance springs 328 restoring the elastic force, the balance spring 328 on the 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 the 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, and the explosion-proof auxiliary fan 203 will be turned to the left and right. The transmission rod 322 and the guide rod 314 on one side of 203 drive the induction plate 312 on that side to rotate, thereby causing the induction switch 315 to disengage from the induction plate 312, thereby starting the explosion-proof auxiliary fan 203. The explosion-proof main fan 202 and the explosion-proof auxiliary fan 203 have the same structure on both sides. Similarly, the induction plate 312 on one side of the explosion-proof main fan 202 is driven to closely contact the inner wall of the switching chamber 311 and touch the induction switch 315 on that side, thereby achieving the technical effect of automatically switching the fan in the event of a fault, effectively solving the technical problem of gas accumulation caused by fan fault.

[0048] The user can simultaneously control the detection explosion-proof servo motor 414 through the external electronic control system, thereby driving the detection half gear 415 to rotate, and at the same time driving the transmission gear 416 to rotate. Since the number of teeth of the detection half gear 415 is half of the transmission gear 416, when the detection half gear 415 rotates normally, the transmission gear 416 rotates half a circle, pauses for a while, and then rotates half a circle, and repeats the cycle in sequence. The piston rod 417 drives the detection piston 412 to reciprocate on the inner wall of the concentration frame 411, thereby driving the gas in the T-shaped air inlet pipe 201 to be brought into the inner wall of the concentration frame 411 through the gap of the detection piston 412, and the gas concentration in the T-shaped air inlet pipe 201 is detected by the gas concentration detector 413. When the gas concentration detected by the gas concentration detector 413 is too high, it will be detected by the gas concentration detector 413. The external electric control system controls the ventilation hydraulic valve 422 to contract, thereby driving the ventilation sleeve 421 to slide on the inner wall of the T-shaped air inlet pipe 201 toward the induction plate 312, thereby driving the induction plates 312 on both sides to rotate, and downwardly pressing the transmission lever 327 and the adaptation frame 324 through the guide rods 314 and the transmission rod 322 on both sides, and driving the adaptation frame 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 induction plates 312 on both sides to disengage 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 and achieving the technical effect of increasing the extraction force according to the gas concentration, effectively solving the technical problem of the prior art requiring manual intervention to adjust the power;

[0049] When the device is working normally, gas is discharged outward from the T-shaped exhaust pipe 204, which can drive the faulty wind wheel 502 to rotate, and then drive the faulty explosion-proof motor 503 to work. 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 at the same time, the faulty wind wheel 502 will have no gas to push, so that the faulty explosion-proof motor 503 stops working, and the detection electromagnet 505 loses its magnetic force. 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 magnetoelectricity, the detection coil 507 will generate current and output it to the outside, thereby activating an external alarm and evacuating people, achieving the technical effect of responding to failures caused by the entire circuit, effectively solving the safety hazards caused by device failure in the prior art, and adding double insurance to the operation of the device.

[0050] It should be noted that, in this document, relational terms such as first and second, etc. are merely 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 present invention and its embodiments are described above. This description is not restrictive. What is shown in the accompanying drawings is only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if ordinary technicians in this field are inspired by it and do not depart from the purpose of the invention, they can creatively design structural methods and embodiments similar to the technical solution, which should all fall within the scope of protection of the present invention.

Claims

1. A fault-proof self-switching dual-fan gas extraction device, characterized by: 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 power control mechanism (4) is arranged inside the integrated box (1). The automatic switching mechanism (3) includes a fault detection mechanism (310) and a real-time switching mechanism (320), both of which are arranged inside the power pumping mechanism (2). The power control mechanism (4) includes a static detection mechanism (410) and a full-power pumping mechanism (420), the static detection mechanism (410) is arranged on the side wall of the power pumping mechanism (2), and the full-power pumping mechanism (420) is arranged inside the power pumping mechanism (2). 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), wherein 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) passes through and is fixedly arranged on the side wall of the integrated box (1), and 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 and arranged on the side wall of the integrated box (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), 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); 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 provided in pairs in the switching box (205). The two switching chambers (311) are respectively connected to the two ends of the T-shaped air intake pipe (201). The sensing plates (312) are rotatably provided on the inner wall of the switching chamber (311) in pairs. The sealing ring (313) is fixedly provided on one side wall of the sensing plate (312). One end of the guide rod (314) is rotatably provided on the other side wall of the sensing plate (312). The sensing switches (315) are fixedly provided on the inner walls of the two switching chambers (311) in pairs. The real-time switching mechanism (320) includes a transmission slot (321), a transmission rod (322), an adaptation slot (323), an adaptation frame (324), a full-power spring (325), a slot (326), a transmission lever (327) and a balance spring (328), wherein the adaptation slot (323) is provided inside the switching box (205), the adaptation frame (324) is slidably provided on the side wall of the adaptation slot (323), one end of the full-power spring (325) is fixedly provided on the bottom wall of the adaptation slot (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 slot (321) is provided on the switching box (205), and the full-power spring (325) is fixedly provided on the bottom wall of the adaptation slot (323). 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 (326) is 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 (326), the balance springs (328) are fixed in pairs on the bottom wall of the adaptation groove (323), and the two balance springs (328) are respectively fixedly connected to the bottom of both ends of the transmission lever (327).

2. The fault-tolerant self-switching dual-fan gas extraction device according to claim 1, 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 to the power shaft of the faulty explosion-proof motor (503); the alarm frame (504) is fixedly arranged on the top of the outer wall of the T-shaped exhaust pipe (204); the detection electromagnet (505) is fixedly arranged on 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).

3. The fault-tolerant self-switching dual-fan gas extraction device according to claim 2, 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 the side wall of the T-shaped air inlet pipe (201). The concentration frame (411) passes through the T-shaped air inlet pipe (201). The detection piston (412) is slidably arranged on the inner wall of the concentration frame (411). The gas concentration detector (413) is fixed to the side wall of the T-shaped air inlet pipe (201). The detection explosion-proof servo motor (414) 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 air inlet pipe (201), 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 position of the transmission gear (416).

4. The fault-tolerant self-switching dual-fan gas extraction device according to claim 3, 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 one end of the ventilation hydraulic device (422) is fixedly arranged on the inner wall of the T-shaped air 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).

5. The fault-tolerant self-switching dual-fan gas extraction device according to claim 4, 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.

6. The fault-tolerant self-switching dual-fan gas extraction device according to claim 5, characterized in that: The detection half gear (415) is meshed 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).

7. The fault-tolerant self-switching dual-fan gas extraction device according to claim 6, characterized in that: The diameter of the sealing ring (313) is larger than the diameter of the T-shaped air intake pipe (201).

Images