Positive pressure air supply type intelligent dust mask for coal mining face and its usage method

Abstract

The present invention belongs to the technical field of mine dust prevention, and specifically discloses a positive pressure air supply type intelligent dust mask for a coal mining face. It includes a positive pressure automatic air intake system, an air supply transfer system, and an intelligent dust mask system. The positive pressure automatic air intake system is arranged in the intake airway. Each system is connected by pipelines. The positive pressure automatic air intake system includes a fan and a signal receiving and processing device. The intelligent dust mask system includes a pressure detection device, a wireless signal transmitting device, and a breathing mask. The pressure detection device monitors the pressure inside the breathing mask in real time, synchronously transmits the pressure signal to the wireless signal transmitting device, and then converts it into a wireless signal and transmits it to the signal receiving and processing device, automatically adjusts the air intake volume of the fan according to the received signal, and transports it into the breathing mask through the air supply transfer system. The present invention fundamentally solves the problems existing in the existing self-priming dust masks and has significant progressive significance.

Description

Technical Field

[0001] The present invention belongs to the technical field of mine dust prevention, and particularly relates to a positive pressure air supply type intelligent dust mask for a coal mining face and a using method thereof. Background Art

[0002] China is rich in coal resources, and the energy provided by coal has always occupied a dominant position in China's energy structure. Therefore, the coal mining industry also occupies a relatively important position in the process of China's industrial development.

[0003] When working in a coal mining face, fresh air flow enters the working face through the intake airway to meet the oxygen demand of workers. However, the clean air introduced into the working face is easily mixed with the coal dust generated in the working face, resulting in a high dust concentration in the air at the working face. Taking personal protective measures is a commonly used protection means to ensure the safety and health of workers. At present, most mine dust masks are self-priming dust masks. After long-term wearing, a large amount of dust will adhere to the filter layer of the mask, increasing the breathing resistance. When mine workers perform high-intensity work underground, it is easy to cause physiological discomfort such as hypoxia.

[0004] Therefore, it is necessary to develop a protective mask that is portable, can perform positive pressure ventilation, intelligently adjust the oxygen demand of workers, and enables workers to still breathe clean air at the intake airway when working at the working face, so as to ensure the physical health of workers. Summary of the Invention

[0005] An object of the present invention is to provide a positive pressure air supply type intelligent dust mask for a coal mining face, which effectively solves the problem that the existing mine dust mask will cause an increase in breathing resistance after long-term wearing.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A positive pressure air supply type intelligent dust mask for a coal mining face includes a positive pressure automatic air intake system, an air supply transfer system, and an intelligent dust mask system. The positive pressure automatic air intake system is arranged in the intake airway, the air supply transfer system is arranged on the hydraulic support, and the intelligent dust mask system is arranged on the machine at the working face.

[0008] The positive pressure automatic air intake system and the air supply transfer system, as well as the air supply transfer system and the intelligent dust mask system, are all connected by pipelines.

[0009] The positive pressure automatic air intake system includes a fan and a signal receiving and processing device connected to the fan. The intelligent dust mask system includes a pressure detection device, a wireless signal transmitting device, and a breathing mask.

[0010] The pressure detection device monitors the pressure inside the breathing mask in real time and synchronously transmits the pressure signal to the wireless signal transmitting device. The wireless signal transmitting device converts the pressure signal into a wireless signal and transmits it to the signal receiving and processing device. After receiving the signal, the signal receiving and processing device automatically adjusts the air intake volume of the blower and conveys it into the breathing mask through the air supply transfer system.

[0011] Further, the positive pressure automatic air intake system further includes an air inlet pipe and a first automatic stretching and retracting device. The blower is arranged in the middle section of the air inlet pipe. The first automatic stretching and retracting device includes a first roller, a first spring device, a first fixing device, and a first air duct wound around the first roller. The first fixing device is used for fixedly installing the positive pressure automatic air intake system. The first air duct is communicated with the air outlet end of the air inlet pipe. The top end of the first roller is connected to the bottom end of the first spring device. The top end of the first spring device is connected to the bottom end of the first fixing device. The top end of the first fixing device is connected to one side of the coal mining face close to the air inlet roadway. When the first roller rotates, the first spring device also rotates, and at the same time, the first spring device gives the first roller a force to restore its original state.

[0012] Further, both ends of the first roller are closed and hollow inside. Bottom through holes and side through holes are respectively arranged on the bottom end and the side wall of the first roller. The air outlet end of the air inlet pipe is rotatably connected to the bottom through hole. One end of the first air duct is connected to the side through hole.

[0013] Further, the air supply transfer system includes a second automatic stretching and retracting device and a pipe quick-connecting device. The second automatic stretching and retracting device includes a second roller, a second spring device, a second fixing device, and a second air duct wound around the second roller. The top end of the second roller is connected to the bottom end of the second spring device. The top end of the second spring device is connected to the bottom end of the second fixing device. The top end of the second fixing device is connected to the hydraulic support.

[0014] Both ends of the second roller are closed and hollow inside. A second bottom through hole and a second side through hole are respectively arranged on the bottom end and the side wall of the second roller. The other end of the first air duct is rotatably connected to the second bottom through hole of the second roller. One end of the second air duct is connected to the second side through hole of the second roller. The other end of the second air duct is connected to the pipe quick-connecting device.

[0015] Further, the pipe quick-connecting device includes a quick-connect joint and a plurality of quick-connect interfaces. The quick-connect joint is communicated with the quick-connect interfaces. The other end of the second air duct is connected to the quick-connect joint.

[0016] Further, the intelligent dust-proof mask system further includes a pulley device, an annular magnet, a third air duct, and a third automatic stretching and retracting device. The third automatic stretching and retracting device is arranged inside the annular magnet, and the pulley device is fixedly connected to the top end of the annular magnet.

[0017] The third automatic stretching and retracting device includes a third roller, a third spring device, a third fixing device, and a fourth air duct wound around the third roller. The top end of the third roller is connected to the bottom end of the third spring device, the top end of the third spring device is connected to the bottom end of the third fixing device, and the top end of the third fixing device is fixedly connected to the inner wall of the annular magnet.

[0018] Both ends of the third roller are closed and hollow inside. A third bottom through hole and a third side through hole are respectively provided on the bottom end and the side wall of the third roller. One end of the third air duct is connected to the quick-connect interface, the other end of the third air duct is rotatably connected to the third bottom through hole of the third roller, one end of the fourth air duct is connected to the third side through hole of the third roller, and the other end of the fourth air duct is connected to the breathing mask.

[0019] Further, the pulley device includes two oppositely arranged pulleys for walking on the machine, a pillar, a pulley base, and a braking device for braking the pulley. The bottom end of the pulley base is fixedly connected to the top end of the annular magnet. The pulley is pivotally connected to one end of the pillar, and the other end of the pillar is fixedly connected to the top end of the pulley base. The braking device is arranged on the pillar.

[0020] The top end of the pulley base is closed and hollow inside. Through holes for the third air duct to pass through are provided on both the side wall and the bottom end of the pulley base.

[0021] Further, the end of the third air duct connected to the quick-connect interface is conical. The inside of the quick-connect interface is filled with a rubber plugging part for controlling the inner diameter of the quick-connect interface. The rubber plugging part includes two rubber pads with hemispherical surfaces arranged back to back and screws connected to the rubber pads. One end of the screw is connected to the lowest end of the rubber pad, and the other end of the screw passes through the pipe wall of the quick-connect interface. By screwing the screw in and out, the shape of the rubber pad is driven to change, thereby changing the inner diameter of the quick-connect interface.

[0022] Further, the breathing mask includes a head strap, an air intake channel, and an air exhaust channel. The air intake channel is arranged at the lower part of the breathing mask. The air intake channel is communicated with the fourth air duct. A plurality of air intake holes for the inside of the breathing mask to communicate with the outside air and safety valves for controlling the opening and closing of the air intake holes are provided on the air intake channel.

[0023] The exhaust passage is provided in the middle of the breathing mask. A micro-vane for opening the exhaust passage outward is provided in the exhaust passage. The pressure detection device is installed on the exhaust passage, and the wireless signal transmitting device is installed on the upper part of the breathing mask.

[0024] Another object of the present invention is to provide a method for using a positive-pressure air supply type intelligent dust-proof mask for a coal mining face, effectively solving the problem that the breathing resistance of the existing mine dust-proof mask increases after long-term wearing.

[0025] A method for using a positive-pressure air supply type intelligent dust-proof mask for a coal mining face as described in the above embodiment includes the following steps:

[0026] S1. The user carries the air supply transfer system and the intelligent dust-proof mask system into the working face at the same time, fixes the air supply transfer system on the hydraulic support near the working location, and at the same time connects the intelligent dust-proof mask system to the air supply transfer system, and fixes the intelligent dust-proof mask system to the machine on the working face.

[0027] S2. Send a start signal through the wireless signal transmitting device to start the positive-pressure automatic air intake system. The clean air flow in the intake airway enters the air supply transfer system, and then the air supply transfer system sends the clean air flow into the breathing mask. Finally, the user wears the breathing mask well and can use it normally.

[0028] S3. During the user's use, the pressure detection device monitors the pressure in the breathing mask in real time and synchronously transmits the pressure signal to the wireless signal transmitting device. The wireless signal transmitting device converts the pressure signal into a wireless signal and transmits it to the signal receiving and processing device. After receiving the signal, the signal receiving and processing device automatically adjusts the air intake volume of the fan to meet the oxygen demand of the user.

[0029] S4. When the user finishes working, send a shutdown signal through the wireless signal transmitting device to turn off the positive-pressure automatic air intake system, remove the intelligent dust-proof mask system and the air supply transfer system, and then leave the working face.

[0030] The beneficial technical effects of the present invention are:

[0031] (1) By arranging the positive-pressure automatic air intake system in the intake airway, and connecting the positive-pressure automatic air intake system, the air supply transfer system and the intelligent dust-proof mask system through pipelines, the user can directly inhale the clean air flow from the intake airway without dust removal, which is beneficial to fundamentally solve the problem that a large amount of dust will adhere to the filter layer of the existing self-priming dust-proof mask after long-term wearing, resulting in an increase in breathing resistance.

[0032] (2) By setting a blower and a signal receiving and processing device connected to the blower in the positive pressure automatic air intake system, and a pressure detection device and a wireless signal transmitting device in the intelligent dust-proof mask system, the present invention facilitates the automatic adaptation to the labor intensity according to the oxygen demand of the user at the working face and the automatic adjustment of the air supply volume, effectively solving the problems such as hypoxia that are likely to occur when mine workers perform high-intensity work underground with existing self-priming dust-proof masks.

[0033] (3) By setting an automatic stretching and retracting device, the present invention effectively avoids a series of safety problems such as damage to the air ducts caused by the entanglement and sagging of the air ducts for conveying clean air currents during system use and the falling of personnel; at the same time, when recovering the system after use, the automatic stretching and retracting device can automatically retract the air ducts, facilitating the next use.

[0034] (4) By setting a air supply transfer system, the present invention is conducive to the long-distance transmission of clean air currents.

[0035] (5) By setting a pulley device in the intelligent dust-proof mask system, the present invention is conducive to the movement and fixation of the main body of the intelligent dust-proof mask system on the machine. In addition, by setting an automatic stretching and retracting device in the intelligent dust-proof mask system, the activity range of the user is expanded when the user wears the breathing mask. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be described in detail below in conjunction with the drawings and specific embodiments.

[0037] Figure 1 is a schematic structural diagram of the present invention;

[0038] Figure 2 is a schematic diagram of the working site of the present invention;

[0039] Figure 3 is a sectional view of the working site of the present invention;

[0040] Figure 4 is Figure 1 a schematic structural diagram of the positive pressure automatic air intake system in

[0041] Figure 5 is Figure 1 a schematic structural diagram of the blower and the signal receiving and processing device in

[0042] Figure 6 is Figure 1 a schematic structural diagram of the air supply transfer system in

[0043] Figure 7 is Figure 1 a schematic structural diagram of the intelligent dust-proof mask system in

[0044] Figure 8 is Figure 1 a schematic structural diagram of a quick-insert device for a pipeline in

[0045] Figure 9 is Figure 1 a schematic structural diagram of a breathing mask in

[0046] Figure 10 is Figure 4 a schematic structural diagram of a first automatic stretching and retracting device in a tightened state and a stretched state in Detailed implementation mode

[0047] Embodiment 1

[0048] As Figures 1 - 3 shown, a positive-pressure air supply type intelligent dust mask for a coal mining face includes a positive-pressure automatic air intake system 1, an air supply transfer system 2, and an intelligent dust mask system 3. The positive-pressure automatic air intake system 1 is arranged in an intake airway, the air supply transfer system 2 is arranged on a hydraulic support, and the intelligent dust mask system 3 is arranged on a machine at the working face. The positive-pressure automatic air intake system 1 and the air supply transfer system 2, as well as the air supply transfer system 2 and the intelligent dust mask system 3, are connected by pipelines, so that the user can directly inhale the clean air flow from the intake airway without dust removal. The intelligent dust mask system 3 monitors the oxygen demand for the respiration of workers at the working face and synchronously sends out wireless signals. After receiving the wireless signals, the positive-pressure automatic air intake system 1 automatically adjusts the air intake volume and sends the appropriate air volume to the workers at the working face through the air supply transfer system 2, effectively solving problems such as easy oxygen deficiency when workers carry out high-intensity work underground.

[0049] As Figure 4 and Figure 5 shown, the positive-pressure automatic air intake system 1 includes a fan 4, a signal receiving and processing device 5 connected to the fan 4, an air intake pipe 6, and a first automatic stretching and retracting device 7. The air intake end of the air intake pipe 6 is arranged at the intake airway, and the air intake end of the air intake pipe 6 is in the shape of a flared trumpet opening outwards. The fan 4 is arranged in the middle section of the air intake pipe 6. The fan 4 is an axial-flow variable-frequency fan. The signal receiving and processing device 5 is arranged on the fan 4. The signal receiving and processing device 5 can receive the wireless signals sent from the intelligent dust mask system 3 and control the air intake volume of the fan 4 according to the wireless signals, ensuring that the air supply volume in the intelligent dust mask system 3 is always the required air volume of the user at the place with the largest oxygen consumption.

[0050] As Figure 4 and Figure 10 ​As shown in the figure, the first automatic stretching and retracting device 7 includes a first drum 71, a first spring device 72, a first fixing device 73, and a first air duct 74 wound around the first drum 71. The first fixing device 73 is used to fixedly install the positive pressure automatic air inlet system 1 on one side of the coal mining face close to the intake airway. Both ends of the first drum 71 are closed and hollow inside. A bottom through hole 711 and a side through hole 712 are respectively provided on the bottom end and the side wall of the first drum 71. The air outlet end of the intake air duct 6 is rotationally connected to the bottom through hole 711 through a pipe rotary bearing. One end of the first air duct 74 is connected to the side through hole 712. The top end of the first drum 71 is connected to the bottom end of the first spring device 72, the top end of the first spring device 72 is connected to the bottom end of the first fixing device 73, and the top end of the first fixing device 73 is connected to one side of the coal mining face close to the intake airway.

[0051] When the first drum 71 rotates, the first spring device 72 also rotates. At the same time, the first spring device 72 gives the first drum 71 a force to restore its original state, which can avoid damage and a series of safety problems caused by excessive sagging of the first air duct 74. In addition, when the positive pressure automatic air inlet system 1 is retracted, the first spring device 72 drives the first drum 71 to automatically retract the first air duct 74. The length of the first air duct 74 can reach the deepest part of the working face.

[0052] As Figure 6 shown in the figure, the air supply transfer system 2 includes a second automatic stretching and retracting device 8 and a pipe quick-connecting device 9. The pipe quick-connecting device 9 includes a quick-connecting joint 91 and a plurality of quick-connecting interfaces 92, and the quick-connecting joint 91 is communicated with the quick-connecting interfaces 92. The second automatic stretching and retracting device 8 includes a second drum 81, a second spring device 82, a second fixing device 83, and a second air duct 84 wound around the second drum 81. The connection structure of the second automatic stretching and retracting device 8 is the same as that of the first automatic stretching and retracting device 7.

[0053] Both ends of the second drum 81 are closed and hollow inside. A second bottom through hole and a second side through hole are respectively provided on the bottom end and the side wall of the second drum 81. The other end of the first air duct 74 is rotationally connected to the second bottom through hole of the second drum 81 through a pipe rotary bearing, thereby connecting the positive pressure automatic air inlet system 1 and the air supply transfer system 2. One end of the second air duct 84 is connected to the second side through hole of the second drum 81, and the other end of the second air duct 84 is connected to the quick-connecting joint 91.

[0054] The top end of the second roller 81 is connected to the bottom end of the second spring device 82. The top end of the second spring device 82 is connected to the bottom end of the second fixing device 83. The top end of the second fixing device 83 is connected to the hydraulic support. The second fixing device 83 is a magnetic attraction device, and the user can quickly install the air supply transfer system 2 onto the hydraulic support around the working site through the second fixing device 83.

[0055] As Figure 7 shown, the intelligent dust-proof mask system 3 includes a pressure detection device 10, a wireless signal transmitting device 11, a pulley device, an annular magnet 12, a third air duct 13, a third automatic stretching and retracting device 14, and a breathing mask 15. The intelligent dust-proof mask system 3 is adsorbed and fixed to the upper middle part of the machine at the working face through the annular magnet 12. One end of the third air duct 13 is connected to the quick-connect interface 92, thereby connecting the intelligent dust-proof mask system 3 to the air supply transfer system 2.

[0056] As Figure 7 and Figure 8 shown, in this embodiment, the end of the third air duct 13 connected to the quick-connect interface 92 is conical. The inside of the quick-connect interface 92 is filled with a rubber plug portion for controlling the inner diameter size of the quick-connect interface 92. The rubber plug portion includes two rubber pads 16 with hemispherical surfaces arranged back to back and a screw 17 connected to the rubber pad 16. One end of the screw 17 is connected to the lowest end of the rubber pad 16, and the other end of the screw 17 passes through the pipe wall of the quick-connect interface 92. By screwing the screw 17 in and out, the shape of the rubber pad 16 is driven to change, thereby changing the inner diameter of the quick-connect interface 92.

[0057] As Figure 7 shown, in order to facilitate the movement and fixation of the main body of the intelligent dust-proof mask system 3 on the machine, in this embodiment, the pulley device includes two relatively arranged pulleys 18 for walking on the machine, a support column 19, a pulley base 20, and a braking device 21 for braking the pulley 18. The bottom end of the pulley base 20 is fixedly connected to the top end of the annular magnet 12. The pulley 18 is pivotally connected to one end of the support column 19. The other end of the support column 19 is fixedly connected to the top end of the pulley base 20. The braking device 21 is arranged on the support column 19. The top end of the pulley base 20 is closed and hollow inside. Through holes for the third air duct 13 to pass through are provided on the side wall and the bottom end of the pulley base 20.

[0058] The third automatic stretching and retracting device 14 includes a third roller, a third spring device, a third fixing device 141, and a fourth air duct 142 wound around the third roller. The connection structure of the third automatic stretching and retracting device 14 is the same as that of the first automatic stretching and retracting device 7. The third automatic stretching and retracting device 14 is horizontally arranged inside the annular magnet 12. The top end of the third roller is connected to the bottom end of the third spring device, the top end of the third spring device is connected to the bottom end of the third fixing device, and the top end of the third fixing device 141 is fixedly connected to the inner wall of the annular magnet 12. The two ends of the third roller are closed and hollow inside. A third bottom through-hole and a third side through-hole are respectively provided on the bottom end and the side wall of the third roller. After the other end of the third air duct 13 passes through the side wall and the through-hole at the bottom end of the pulley base 20, it enters the inside of the annular magnet 12 and is rotationally connected to the third bottom through-hole of the third roller through a pipe rotary bearing. One end of the fourth air duct 142 is connected to the third side through-hole of the third roller, and the other end of the fourth air duct 142 is connected to the breathing mask 15. When the user wears the breathing mask 15, by stretching the fourth air duct 142, the activity range is effectively enlarged.

[0059] As Figure 9 shown, the breathing mask 15 includes a head strap 151, an air inlet channel 152, and an air outlet channel 153. The breathing mask 15 fits the size of the human head and face, and there is a certain breathing exchange space between the breathing mask 15 and the user's mouth and nose. The air inlet channel 152 is arranged at the lower part of the breathing mask 15, and the air inlet channel 152 is communicated with the fourth air duct 142. A plurality of air inlet holes 154 for the inside of the breathing mask 15 to communicate with the outside air and a safety valve 155 for controlling the opening and closing of the air inlet holes 154 are provided on the air inlet channel 152. The safety valve 155 controls the opening of the air inlet holes 154 when the air intake of the breathing mask 15 is insufficient, so that the inside of the breathing mask communicates with the outside air through the air inlet holes 154.

[0060] The air outlet channel 153 is arranged in the middle of the breathing mask 15, and a micro-vane 156 that can only open outward is arranged in the air outlet channel 153. The pressure detection device 10 is installed on the air outlet channel 153, and can monitor the pressure change inside the breathing mask 15 in real time and synchronously transmit the pressure signal to the wireless signal transmitting device 11. The wireless signal transmitting device 11 is installed on the upper part of the breathing mask 15, and the wireless signal transmitting device 11 can convert the pressure signal into a wireless signal and transmit it to the signal receiving and processing device 5. After receiving the signal, the signal receiving and processing device 5 automatically adjusts the air intake volume of the blower 4 and transports it into the breathing mask 15 through the air supply transfer system 2.

[0061] Embodiment 2

[0062] A method for using a positive pressure air supply type intelligent dust mask for a coal mining face described in Embodiment 1, comprising the following steps:

[0063] S1. The user simultaneously carries the air supply transfer system 2 and the intelligent dust mask system 3 into the working face, fixes the air supply transfer system 2 on a hydraulic support near the working location, and at the same time connects the intelligent dust mask system 3 to the air supply transfer system 2 through the pipe quick connector 9, and fixes the intelligent dust mask system 3 to the machine on the working face by using the annular magnet 12 of the intelligent dust mask system 3. The user stretches the fourth air pipe 142 according to his own needs and wears the breathing mask.

[0064] S2. The user sends a start signal through the wireless signal transmitter 11 to start the positive pressure automatic air intake system 1. The clean air flow in the intake airway enters the air supply transfer system 2, and then the air supply transfer system 2 sends the clean air flow into the breathing mask 15. Finally, the user wears the breathing mask 15 well and can use it normally.

[0065] S3. During the user's use, the pressure detection device 10 continuously monitors the pressure in the breathing mask 15, senses the user's labor intensity and oxygen demand, and synchronously transmits the pressure signal to the wireless signal transmitter 11. The wireless signal transmitter 11 converts the pressure signal into a wireless signal and transmits it to the signal receiving and processing device 5. After receiving the signal, the signal receiving and processing device 5 automatically adjusts the air intake volume of the blower 4 to meet the user's oxygen demand.

[0066] S4. When the user finishes working, a shutdown signal is sent through the wireless signal transmitter 11 to turn off the positive pressure automatic air intake system 1. After removing the intelligent dust mask system 3 and the air supply transfer system 2, the user leaves the working face, and the first air pipe 74 is automatically wound onto the first roller 71.

[0067] The present invention has the advantages of convenience, safety and dust prevention, realizes long-distance transportation of clean air flow, and ensures that the user can still breathe clean air in the harsh environment of the working face. The present invention not only fundamentally solves the problem that in the existing self-priming dust mask, after long-term wearing, a large amount of dust will adhere to the filter layer of the mask, resulting in an increase in breathing resistance; but also effectively solves the problem that the user is prone to hypoxia when working intensively underground, and has significant progressive significance.

[0068] The parts not described in the present invention can be realized by adopting or referring to the prior art. In addition, the above description is not a limitation to the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present invention shall also fall within the protection scope of the present invention.

Claims

1. A positive pressure air supply type intelligent dust mask for coal mining face, characterized in that, It includes a positive-pressure automatic air intake system, an air supply transfer system, and an intelligent dust-proof mask system. The positive-pressure automatic air intake system is installed in the intake airway, the air supply transfer system is installed on the hydraulic support, and the intelligent dust-proof mask system is installed on the machine at the working face; The positive-pressure automatic air intake system is connected to the air supply transfer system and the air supply transfer system is connected to the intelligent dust-proof mask system through pipelines; The positive-pressure automatic air intake system includes a fan and a signal receiving and processing device connected to the fan. The intelligent dust-proof mask system includes a pressure detection device, a wireless signal transmitting device, and a breathing mask; The pressure detection device monitors the pressure inside the breathing mask in real time and synchronously transmits the pressure signal to the wireless signal transmitting device. The wireless signal transmitting device converts the pressure signal into a wireless signal and transmits it to the signal receiving and processing device. After receiving the signal, the signal receiving and processing device automatically adjusts the air intake volume of the fan and transports it into the breathing mask through the air supply transfer system; The positive-pressure automatic air intake system further includes an intake pipe and a first automatic stretching and retracting device. The fan is arranged in the middle section of the intake pipe. The first automatic stretching and retracting device includes a first roller, a first spring device, a first fixing device, and a first air duct wound around the first roller. The first fixing device is used for fixedly installing the positive-pressure automatic air intake system. The first air duct is communicated with the air outlet end of the intake pipe. The top end of the first roller is connected to the bottom end of the first spring device. The top end of the first spring device is connected to the bottom end of the first fixing device. The top end of the first fixing device is connected to one side of the coal mining face close to the intake airway. When the first roller rotates, the first spring device also rotates. At the same time, the first spring device gives the first roller a force to restore its original state; Both ends of the first roller are closed and hollow inside. A bottom through hole and a side through hole are respectively provided on the bottom end and the side wall of the first roller. The air outlet end of the intake pipe is rotatably connected to the bottom through hole. One end of the first air duct is connected to the side through hole.

2. The positive pressure air supply type intelligent dust mask for coal mining face according to claim 1, characterized in that, The air supply transfer system includes a second automatic stretching and retracting device and a pipeline quick-insertion device. The second automatic stretching and retracting device includes a second roller, a second spring device, a second fixing device, and a second air duct wound around the second roller. The top end of the second roller is connected to the bottom end of the second spring device. The top end of the second spring device is connected to the bottom end of the second fixing device. The top end of the second fixing device is connected to the hydraulic support; Both ends of the second roller are closed and hollow inside. A second bottom through hole and a second side through hole are respectively provided on the bottom end and the side wall of the second roller. The other end of the first air duct is rotatably connected to the second bottom through hole of the second roller. One end of the second air duct is connected to the second side through hole of the second roller. The other end of the second air duct is connected to the pipeline quick-insertion device.

3. The positive pressure air supply type intelligent dust mask for coal mining face according to claim 2, characterized in that, The pipeline quick-insertion device includes a quick-insertion joint and a plurality of quick-insertion interfaces, which are connected and communicate with each other. The other end of the second air duct is connected to the quick-insertion joint.

4. The positive pressure air supply type intelligent dust mask for coal mining face according to claim 3, characterized in that, The intelligent dust-proof mask system further includes a pulley device, an annular magnet, a third air duct, and a third automatic stretching and retracting device. The third automatic stretching and retracting device is arranged inside the annular magnet, and the pulley device is fixedly connected to the top end of the annular magnet. The third automatic stretching and retracting device includes a third roller, a third spring device, a third fixing device, and a fourth air duct wound around the third roller. The top end of the third roller is connected to the bottom end of the third spring device, the top end of the third spring device is connected to the bottom end of the third fixing device, and the top end of the third fixing device is fixedly connected to the inner wall of the annular magnet. Both ends of the third roller are closed and hollow inside. A third bottom through hole and a third side through hole are respectively provided on the bottom end and the side wall of the third roller. One end of the third air duct is connected to the quick-insertion interface, and the other end of the third air duct is rotatably connected to the third bottom through hole of the third roller. One end of the fourth air duct is connected to the third side through hole of the third roller, and the other end of the fourth air duct is connected to the breathing mask.

5. The positive pressure air supply type intelligent dust mask for coal mining face according to claim 4, characterized in that, The pulley device includes two oppositely arranged pulleys for walking on the machine, a support column, a pulley base, and a braking device for braking the pulleys. The bottom end of the pulley base is fixedly connected to the top end of the annular magnet. The pulley is pivotally connected to one end of the support column, and the other end of the support column is fixedly connected to the top end of the pulley base. The braking device is arranged on the support column. The top end of the pulley base is closed and hollow inside. Through holes for the third air duct to pass through are provided on both the side wall and the bottom end of the pulley base.

6. The positive pressure air supply type intelligent dust mask for coal mining face according to claim 5, characterized in that, The end of the third air duct connected to the quick-insertion interface is conical. The inside of the quick-insertion interface is filled with a rubber plugging part for controlling the inner diameter of the quick-insertion interface. The rubber plugging part includes two oppositely arranged rubber pads with hemispherical surfaces and screws connected to the rubber pads. One end of the screw is connected to the lowest end of the rubber pad, and the other end of the screw passes through the pipe wall of the quick-insertion interface. By screwing the screw in and out, the shape of the rubber pad is driven to change, thereby changing the inner diameter of the quick-insertion interface.

7. The positive pressure air supply type intelligent dust mask for coal mining face according to claim 6, characterized in that, The breathing mask includes a head tie, an air intake channel, and an air exhaust channel. The air intake channel is arranged at the lower part of the breathing mask and is connected and communicates with the fourth air duct. A plurality of air intake holes for the inside of the breathing mask to communicate with the outside air and safety valves for controlling the opening and closing of the air intake holes are provided on the air intake channel. The air exhaust channel is arranged in the middle of the breathing mask. A micro blade for outwardly opening the air exhaust channel is arranged in the air exhaust channel. The pressure detection device is installed on the air exhaust channel, and the wireless signal transmitting device is installed on the upper part of the breathing mask.

8. A using method of the positive pressure air supply type intelligent dust mask for coal mining face according to any one of claims 1 - 7, characterized in that, Including the following steps: S1. The user carries the air supply transfer system and the intelligent dust-proof mask system into the working face at the same time, fixes the air supply transfer system on the hydraulic support near the working location, and at the same time connects the intelligent dust-proof mask system to the air supply transfer system, and fixes the intelligent dust-proof mask system to the machine on the working face; S2. Send a start signal through the wireless signal transmitting device to start the positive pressure automatic air intake system. The clean air flow in the intake airway enters the air supply transfer system, and then the air supply transfer system sends the clean air flow into the breathing mask. Finally, the user wears the breathing mask and can use it normally; S3. During the user's use, the pressure detection device monitors the pressure in the breathing mask in real time and synchronously transmits the pressure signal to the wireless signal transmitting device. The wireless signal transmitting device converts the pressure signal into a wireless signal and transmits it to the signal receiving and processing device. After receiving the signal, the signal receiving and processing device automatically adjusts the air intake volume of the fan to meet the user's oxygen demand; S4. When the user finishes working, send a shutdown signal through the wireless signal transmitting device to turn off the positive pressure automatic air intake system, remove the intelligent dust-proof mask system and the air supply transfer system, and then leave the working face.

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