CN111068198B - Dust filtering and air supplying type dust mask for mine, wearing method and testing method thereof - Google Patents

Abstract

The invention belongs to mine personal protection portable instrument equipment, and relates to a mine dust filtering and air supplying type dustproof mask, which comprises a breathing mask, wherein the breathing mask covers the mouth and the nose of a user, and a breathing exchange space is formed between the breathing mask and the mouth and the nose of the user; the head lacing is connected to the breathing mask and used for assisting the breathing mask to cover the mouth and nose of a user in a mode of being fixed on the head, the shoulders and the neck of the user; the main body of the main machine is of a tubular structure, and the main machine is internally provided with a micro fan; the filter is connected to one end part of the tubular structure of the main body of the main machine, and the main machine and the filter form a tubular assembly body; the assembly body is connected with the breathing mask to enable the breathing exchange space to be communicated with the main body tube of the assembly body, the assembly body is arranged on the shoulder and neck of a user, and external air is driven by the micro fan to enter the host through the filter. This dustproof mask initiative air supply, and portable high efficiency. The invention also provides the dustproof mask, a testing method and a wearing method thereof.

Description

Dust filtering and air supplying type dust mask for mine, wearing method and testing method thereof

Technical Field

The invention belongs to portable instrument equipment of personal protection type of mine, belongs to a dust filtering mask for mine, and particularly relates to a dust filtering and air supplying type dust filtering mask for mine.

Background

The environment of colliery operation is abominable, and the dust is serious, and ventilation condition is very poor, and pneumoconiosis is high, seriously endangers worker's healthy, and colliery underground working personnel need wear corresponding breathing protective equipment, avoid high dust environment to healthy harm, reduce the probability of suffering from pneumoconiosis, promote colliery underground work efficiency. However, in the existing mining breathing dust cover, dust particles are gradually deposited on a filter layer after the self-suction filtering type dust cover is used for a long time, so that the breathing resistance is continuously increased, the dust cover is laborious and sultry after long-time use, the dust cover is poor in fit with the face, air leakage is easily caused, and the filtering effect is reduced; the external supply air supply type dustproof shield has large overall mass, long air supply pipeline and inconvenient long-time high-intensity flexible labor operation. Therefore, it is necessary to develop a portable, small-sized mining breathing dust-proof device which can effectively overcome the breathing resistance and has good dust-proof effect to solve the problems in the prior art.

In the prior art, when the self-suction type dust mask is worn, the respiratory resistance is large, the feeling of oppression exists, the air leakage is easy, and the dust-proof filtering effect is extremely poor; the self-contained air respirator needs to carry an oxygen bottle, has larger mass and belongs to emergency rescue equipment; the long-tube respirator is required to be worn between the waists and connected by a longer conduit, has a complex structure and is not beneficial to flexible labor.

Disclosure of Invention

In order to solve the problems, the invention provides the dust-filtering air-supplying type dust mask for mines, which solves the technical problems of the existing dust-preventing shield products for mines, overcomes the defects of the prior art, provides the dust-filtering air-supplying type dust mask for mines, which has high filtering efficiency, small respiratory resistance and flexible and portable wearing, is worn at the shoulder and neck part according to the labor intensity and vital capacity requirements of underground operation staff in China, can overcome the defect of large respiratory resistance of the dust mask, can solve the problem of complex and heavy wearing of a long-tube respirator, and has important significance for strengthening the professional safety and health protection capability in China and improving the level of personal protection technical equipment of mines. In addition, the invention also provides the dustproof mask, a testing method and a wearing method thereof.

In order to achieve the above purpose, the invention adopts the following technical scheme:

in a first embodiment, a dust filtering and air blowing dust mask for mines comprises:

the breathing mask covers the mouth and the nose of the user, a breathing exchange space is formed between the breathing mask and the mouth and the nose of the user, and an exhalation valve is arranged on the breathing mask;

the head lacing is connected to the breathing mask and used for assisting the breathing mask to cover the mouth and nose of a user in a mode of being fixed on the head, the shoulders and the neck of the user;

the main body of the main machine is of a tubular structure, and the main machine is internally provided with a micro fan;

the filter is connected to one end part of the tubular structure of the main body of the main machine, and the main machine and the filter form a tubular assembly body;

the assembly body is connected with the breathing mask to enable the breathing exchange space to be communicated with the main body pipe of the assembly body, the breathing mask and the assembly body form a surrounding structure, the assembly body is arranged on the neck of a shoulder of a user, and external air is driven by the micro fan to enter the host through the filter and is finally conveyed to the breathing exchange space.

In a first embodiment, preferably, the host further includes a corrugated hose, an internal thread nut, and a controller, the corrugated hose is sleeved outside the mini fan, the internal thread nut is installed at two ends of the corrugated hose through internal threads, a first end of the controller and a first end of the filter are connected at two ends of the corrugated hose through the internal thread nut respectively, and a second end of the controller and a second end of the filter are connected with the breathing mask respectively.

In a first embodiment, as an preference, the controller further includes a control unit, a controller housing, an air passage unit and a quick rotary joint, where the control unit is electrically connected with the micro fan and is used for controlling the micro fan, a first end of the air passage unit is connected with an end of the corrugated hose through an internal thread nut, the quick rotary joint is installed at a second end of the air passage unit, the second end of the air passage unit is connected with the breathing mask through the quick rotary joint, the controller housing is externally hung outside the air passage unit, a part of the control unit is arranged in the controller housing, and the control unit is used for detecting the pressure of gas in the host and controlling the working state of the micro fan.

In a first embodiment, as an preference, the micro fan is a variable frequency fan, the control unit includes a CPU control module, a man-machine interaction module, and a power module, the air channel unit has a pressure balance film covering the cross section of the air channel unit, a pressure sensor is attached to the pressure balance film, the CPU control module is used as a core, the CPU control module is respectively and electrically connected with the man-machine interaction module, the power module, the micro fan and the pressure sensor, the pressure sensor is used for measuring the gas pressure of an internal pipeline and transmitting a pressure signal to the CPU control module through a cable, and the CPU control module transmits a control signal to the micro fan by analyzing the pressure signal so as to adjust the air supply quantity.

In a first embodiment, as an preference, the man-machine interaction module includes a keypad disposed on the controller housing, where the keypad includes a start key, a test key, three power indicator lamps for displaying a remaining power of the power module, a filter indicator lamp, and a test indicator lamp.

In the first embodiment, as a preferred embodiment, the circuit of the man-machine interaction module is as follows, pins 1 and 2 of the wiring terminal J1 are respectively connected with the test key SW2 and the start key SW1, pins 3, 4, 5, 6 and 7 of the wiring terminal J1 are respectively connected with the light emitting diodes LED1, LED2, LED3, LED4 and LED5, and pin 8 of the wiring terminal J1 is grounded; j1 and J2 are internally connected through a flat cable;

the 1 pin of the wiring terminal J2 is grounded, the 2 pin series resistor R6 of the J2 is connected with the LED5 pin of the CUP control module 40, the 3 pin series resistor R8 of the J2 is connected with the LED4 pin of the CUP control module, the 4 pin series resistor R10 of the J2 is connected with the LED3 pin of the CUP control module, the 5 pin series resistor R11 of the J2 is connected with the LED2 pin of the CUP control module, the 6 pin series resistor R12 of the J2 is connected with the LED1 pin of the CUP control module, the 7 pin series resistor R14 of the J2 is connected with the K1 pin of the CUP control module, the 8 pin series resistor R15 of the J2 is connected with the K2 pin of the CUP control module, the 7 pin series resistor R3 of the J2 is connected with the power VCC, and the 8 pin series resistor R4 of the J2 is connected with the power VCC;

the LED control module comprises a voltage stabilizing tube TS2, a CUP control module, an LED2 pin, a CUP control module, a voltage stabilizing tube TS2, a CUP control module and a CUP control module, wherein the 1 pin of the voltage stabilizing tube TS2 is connected with the LED2 pin, the 3 pin of the voltage stabilizing tube TS2 is connected with the LED3 pin of the CUP control module, the 4 pin of the voltage stabilizing tube TS2 is connected with the LED5 pin of the CUP control module, and the 6 pin of the voltage stabilizing tube TS2 is connected with the LED4 pin of the CUP control module; the 1 pin of the voltage stabilizing tube TS3 is connected with a power supply, the 3 pin of the voltage stabilizing tube TS3 is connected with the LED1 pin of the CUP control module, the 4 pin of the voltage stabilizing tube TS3 is connected with the K2 pin of the CUP control module 40, and the 6 pin of the voltage stabilizing tube TS3 is connected with the K1 pin of the CUP control module; pins 2 and 5 of the voltage stabilizing tubes TS2 and TS3 are grounded.

In a first embodiment, as a preference, the filter includes an air duct, a first stage filter module, a first stage filter screen frame, a filter housing, a second stage filter module and an air blocking plug, wherein a first end of the air duct is connected with an end portion of the bellows through an internal thread nut, a second end of the air duct is connected with the breathing mask through a quick rotary joint, the air blocking head is arranged at a second end of the air duct, the filter housing is arranged outside the air duct, the second stage filter module is filled in the filter housing, the first stage filter screen frame is of an annular structure, the first stage filter module covers a surrounding area in the middle of the first stage filter screen frame, and the first stage filter screen frame can be buckled in an opening area outside the filter housing.

In a first embodiment, as the preference, the respiratory mask is provided with a cone-shaped outer taper sleeve joint, the quick rotary joint comprises an outer ring, a spring ring and an inner taper sleeve joint, wherein the outer ring is sleeved outside the inner taper sleeve joint, spring clamping grooves are designed inside the outer ring and the inner taper sleeve joint, the spring ring is installed in the spring clamping grooves, an annular groove is arranged on the outer ring surface of the outer taper sleeve joint, the outer ring rotates relative to the inner taper sleeve joint to adjust the size of the spring ring, the inner taper sleeve joint is sleeved on the outer ring surface of the outer taper sleeve joint, and when the spring ring is embedded into the annular groove, the outer taper sleeve joint is sealed with the inner taper sleeve joint through the conical surface.

In a first embodiment, as an preference, the micro fan is composed of a PCB board, a fan upper cover, fan blades, a motor shaft, a fan housing, a permanent magnet rotor, a motor housing rotor liner, a soft magnet ring, a stator coil and a motor housing, wherein the motor housing is arranged inside the fan housing, the motor housing and the fan housing are both tubular and coaxially arranged, an air circulation channel is formed between the motor housing and the fan housing, the motor shaft is arranged at the axial position of the motor housing through a bearing, the permanent magnet rotor is fixedly sleeved on the motor shaft, the motor housing rotor liner, the soft magnet ring, the stator coil and the PCB board are arranged in the motor housing, the first end of the motor shaft extends out of the motor housing, and the fan blades are arranged at the position of the first end of the fan housing, which is close to the motor shaft, and cover the fan blades.

In a first embodiment, preferably, the host has a neck pad, the neck pad is located near the back side of the neck of the user, and the contact surface of the neck pad is curved.

In the first embodiment, preferably, the breathing mask is in an inverted T-shaped structure, the two wings of the mouth of the breathing mask extend backwards, and the two wings of the mouth of the breathing mask are respectively connected with the host machine and the filter.

In a first embodiment, preferably, the control unit further comprises a communication module for transmitting wearer information and pressure data in the dust mask, wherein the communication module comprises a bluetooth module or a WiFi module or a ZigBee module or a LoRa module, or a combination of the above different modules.

In a second technical scheme, the wearing method of the mining dust-filtering air-supplying type dust mask uses the mining dust-filtering air-supplying type dust mask in the first technical scheme, and comprises the following steps:

step A1, wearing a breathing mask on the mouth and nose of a user, enabling the edge of the inner side of the breathing mask to be attached to the face, and wearing head ties on the head and the shoulder and neck of the user after the breathing mask is worn, so that the breathing mask is comfortably fixed on the face;

a2, waking up and starting the micro fan;

step A3, sleeving the assembly body from the rear side of the neck and surrounding the assembly body on the neck of the shoulder, holding an outer cone sleeve joint at one side of the breathing mask by one hand, holding a quick rotary joint of the host by the other hand, pushing the outer cone sleeve joint into the quick rotary joint, and rotating an outer ring to connect the host with the breathing mask;

and A4, holding the outer cone sleeve joint at the other side of the breathing mask by one hand, holding the quick rotary joint of the filter by the other hand, pushing the outer cone sleeve joint into the quick rotary joint, and then rotating the outer ring to connect the filter with the breathing mask.

In a third technical scheme, the method for testing the dust-filtering air-supplying type dust mask for mines uses the dust-filtering air-supplying type dust mask for mines in the first technical scheme, and comprises the following steps:

step B1, wearing a dust filtering and air supplying type dust mask for mines on the head of a user, and pressing a start key device to start a host;

step B2, after the wearer breathes normally, the system starts to adjust the air supply quantity according to the breathing quantity;

step B3, after a test key is pressed for a set time, entering a test mode, starting the micro fan and blowing the air with the maximum air quantity, then pressing the test key to reduce the primary air quantity for blowing, and pressing the test key to re-blow the micro fan with the maximum air quantity for blowing, thus the cycle is performed;

and step B4, pressing a start key in the test mode to exit the test mode.

The beneficial effects of using the invention are as follows:

the dustproof mask is miniaturized, small in size, light in weight, convenient to wear, suitable for high-intensity labor operation and comfortable to wear, and can be placed on the neck and shoulder of a user in an inserting mode of the host, the filter and the breathing mask, and meanwhile the whole structure is kept at about 450 g. The miniature fan is arranged in the dustproof mask, and power is actively provided by the fan, so that the dustproof mask is high in filtering efficiency and small in respiratory resistance. The dustproof mask is connected with the host, the filter and the breathing mask through the quick rotary joint, is of a new structural design, is simple and convenient to operate, has good sealing performance, and can realize quick connection and disconnection. The filtering mode adopts a two-stage filtering mode, wherein a two-stage filtering mode of primary coarse filtering and secondary fine filtering is adopted, the filter has a filter element performance monitoring function, when the dust concentration is high, an anti-static dust-proof sleeve can be added outside the filter to prevent the filter from being blocked too fast, and three-layer filtering is formed. The breathing response air flow intelligent control, the built-in pressure sensor of host computer controller, through breathing air flow pressure intelligent control regulation miniature fan rotational speed and then adjust the air supply volume. The air is inhaled from the bottom of the filter, enters the corrugated hose after primary coarse filtration and secondary fine filtration and is transmitted to the breathing mask, compared with a long-tube respirator, the air transmission distance is greatly shortened, the air quantity is greatly improved, and the breathing wearing comfort is remarkably improved. The maximum air quantity of the dustproof mask is more than or equal to 200L/min, the continuous working time is more than or equal to 8 hours, the built-in communication module has a filter element performance monitoring function, personnel information and pressure values are output, a long-time high-efficiency working state can be maintained, and the dustproof mask is suitable for special environments such as underground coal mines.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the dust filtering and air supplying type dust mask for mine.

Fig. 2 is a schematic diagram of a main machine structure of the dust filtering and air supplying type dust mask for mine.

Fig. 3 is a schematic diagram of a micro fan in the dust filtering and air supplying type dust mask for mine.

Fig. 4 is a schematic diagram of a controller in the dust filtering and air supplying type dust mask for mine.

Fig. 5 is a schematic structural view of a quick rotary joint in the dust filtering and air supplying type dust mask for mine.

Fig. 6 is a schematic diagram of a filter structure in the dust filtering and air supplying type dust mask for mine.

Fig. 7 is a schematic diagram of the structure of a breathing mask in the dust filtering and air supplying type dust mask for mine.

Fig. 8 is a schematic diagram showing connection of a control system in the dust filtering and air supplying type dust mask for mine.

Fig. 9 is a schematic view of a keypad in the dust filtering and air supplying type dust mask for mine use of the present invention.

Fig. 10 is a schematic circuit diagram of a man-machine interaction module in the dust filtering and air supplying type dust mask for mine.

The reference numerals include:

101-mainframe, 102-filter, 103-respiratory mask, 104-head tie;

11-neck protection pad, 12-mini fan, 120-PCB board, 121-fan upper cover, 122-fan blade, 123-motor shaft, 124-fan shell, 125-permanent magnet rotor, 126-motor shell rotor lining, 127-soft magnetic ring, 128-stator coil, 129-motor shell, 13-corrugated hose, 14-internal thread nut, 15-controller, 152-key board, 153-controller shell, 155-air channel unit, 156-pressure sensor, 157-pressure balance film, 158-quick rotary joint, 1581-outer ring, 1582-spring ring, 1583-internal taper sleeve joint;

21-primary filter module, 22-primary filter net rack, 23-filter shell, 24-secondary filter module and 25-air choke plug;

31-an outer taper sleeve joint, 32-an exhalation valve, 33-a silica gel mask;

40-CPU control module, 41-man-machine interaction module, 42-power module, 43-communication module;

411-start key, 412-test key, 413-power indicator, 414-cartridge indicator, 415-test indicator.

Detailed Description

In order to make the objects, technical solutions and advantages of the present technical solution more apparent, the present technical solution is further described in detail below in conjunction with the specific embodiments. It should be understood that the description is only illustrative and is not intended to limit the scope of the present technical solution.

As shown in fig. 1 to 10, the mining dust filtering and air supplying type dustproof mask provided by the embodiment comprises a breathing mask 103, wherein the breathing mask 103 covers the mouth and the nose of a user, a breathing exchange space is formed between the breathing mask 103 and the mouth and the nose of the user, and an exhalation valve 32 is arranged on the breathing mask 103; a head tie 104 connected to the breathing mask 103, the head tie 104 assisting the breathing mask 103 to cover the mouth and nose of the user by being fixed on the head and the shoulders and the neck of the user; the main body of the main machine 101 is of a tubular structure, and the main machine 101 is internally provided with a micro fan 12; a filter 102 connected to one end of the tubular structure of the main body 101, the main body 101 and the filter 102 forming an assembly body having a tubular shape; the assembly body is connected with the breathing mask 103 so that the breathing exchange space is communicated with the main body pipe of the assembly body, the breathing mask 103 and the assembly body form a surrounding structure, the assembly body is arranged on the neck of the shoulder of a user, and external air is driven by the micro fan 12 to enter the host 101 through the filter 102 and finally is conveyed to the breathing exchange space.

Preferably, the main unit 101 has a neck pad 11, the neck pad 11 is near the back side of the neck of the user, and the contact surface of the neck pad 11 is curved.

The main unit 101 is fixed with the filter 102 through threaded connection, the breathing mask 103 is connected with the main unit 101 and the filter 102 through a quick adapter device, and the quick adapter device is connected with a quick adapter taper sleeve in a matching way through a quick rotary connector 158, so that the breathing mask is convenient to disassemble and assemble. Head strap 104 is threaded through the lacing columns of respiratory mask 103 and secured with a retaining ring, and head strap 104 is adjustable in length to cooperate with neck pad 11 in main frame 101 to assist in securing the dust mask to the head of a user, and main frame 101 and filter 102 are placed on the shoulders of the user.

As shown in fig. 2, in the host 101, the corrugated hose 13, the internal thread nut 14 and the controller 15 are sleeved outside the micro fan 12, the internal thread nut 14 is installed at two ends of the corrugated hose 13 through internal threads, a first end of the controller 15 and a first end of the filter 102 are respectively connected at two ends of the corrugated hose through the internal thread nut 14, and a second end of the controller 15 and a second end of the filter 102 are respectively connected with the breathing mask 103.

The neck protection pad 11 and the two corrugated hoses 13 are sleeved on the shell of the micro fan 12, and the corrugated hoses 13 are provided with inner screw nuts 14 which are used for being connected and fixed with the controller 15 and the outer screw studs in the filter 102.

As shown in fig. 3, the micro fan 12 is composed of a PCB board 120, a fan upper cover 121, fan blades 122, a motor shaft 123, a fan housing 124, a permanent magnet rotor 125, a motor housing rotor liner 126, a soft magnetic ring 127, a stator coil 128 and a motor housing 129, wherein the motor housing 129 is disposed inside the fan housing 124, the motor housing 129 and the fan housing 124 are all tubular and coaxially disposed, an air circulation channel is formed between the motor housing 129 and the fan housing 124, the motor shaft 123 is mounted at the axial position of the motor housing 129 through a bearing, the permanent magnet rotor 125 is fixedly sleeved on the motor shaft 123, the motor housing rotor liner 126, the soft magnetic ring 127, the stator coil 128 and the PCB board 120 are mounted in the motor housing 129, a first end of the motor shaft 123 extends out of the motor housing 129, and the fan blades 122 are mounted at a first end position of the fan housing 124 close to the motor shaft 123 and cover the fan blades 122.

Permanent magnet rotor 125 is installed in motor casing rotor inside lining 126, and motor casing 129 is interior to install soft magnetic ring 127, stator coil 128 and PCB board 120, and fan leaf 122 is installed on motor shaft 123, and fan upper cover 121 and fan lower cover are with all parts combination in the inside.

As shown in fig. 4, the controller 15 further includes a control unit, a controller housing 153, an air channel unit 155, and a quick rotary joint 158, where the control unit is electrically connected with the micro fan 12 and is used for controlling the micro fan 12, the first end of the air channel unit 155 is connected with the end of the corrugated hose 13 through the internal thread nut 14, the quick rotary joint 158 is installed at the second end of the air channel unit 155, the second end of the air channel unit 155 is connected with the respiratory mask 103 through the quick rotary joint 158, the controller housing 153 is hung outside the air channel unit 155, part of the components of the control unit are disposed in the controller housing 153, and the control unit is used for detecting the gas pressure in the host 101 and controlling the working state of the micro fan 12.

The CPU control module 40 is connected to the key sheet 152 and the battery module by cables, and a control core forming a dust mask is fixed in the controller housing 153. The air channel unit 155 is provided with an external screw bolt on one side for fixing with the corrugated hose 13, a quick rotary joint 158 on the other side for fixing with the breathing mask 103, a pressure balance film 157 is arranged in the air channel unit 155, a pressure sensor 156 is arranged on the pressure balance film 157 for measuring the gas pressure of the internal pipeline and transmitting a pressure signal to the CPU control module 40 through a cable, and the CPU control module 40 transmits a control signal to the micro fan 12 through analyzing the pressure signal so as to adjust the air supply quantity.

As shown in fig. 5, the respiratory mask 103 is provided with a cone-shaped outer cone sleeve joint 31, the quick rotary joint 158 comprises an outer ring 1581, a spring ring 1582 and an inner cone sleeve joint 1583, wherein the outer ring 1581 is sleeved outside the inner cone sleeve joint 1583, spring clamping grooves are designed in the outer ring 1581 and the inner cone sleeve joint 1583, the spring ring 1582 is installed in the spring clamping grooves, the outer ring 1581 surface of the outer cone sleeve joint 31 is provided with an annular groove, the outer ring 1581 rotates relative to the inner cone sleeve joint 1583 to adjust the size of the spring ring 1582, the inner cone sleeve joint 1583 is sleeved on the outer ring 1581 surface of the outer cone sleeve joint 31, and when the spring ring 1582 is embedded into the annular groove, the outer cone sleeve joint 31 and the inner cone sleeve joint 1583 are sealed through conical surfaces.

Spring clamping grooves are formed in the outer ring 1581 and the inner cone sleeve joint 1583, the spring ring 1582 is embedded, the size of the spring ring 1582 can be controlled through rotating the outer ring 1581, the quick rotary joint 158 is matched with the outer cone sleeve joint 31, when the spring ring 1582 is clamped into the clamping groove of the outer cone sleeve joint 31, the inner cone sleeve and the outer cone sleeve are sealed through conical surfaces, quick adapter installation is achieved, the outer ring 1581 is rotated, and the spring ring 1582 is expanded to be separated from the clamping groove of the outer cone sleeve, so that the spring ring 1582 can be detached from the outer cone sleeve joint 31. The quick adapter device can realize the quick assembly disassembly of the breathing mask 103, the host 101 and the filter 102, and is more convenient for a user to wear and disassemble the dust mask. The CPU control module 40, the key board 152, the battery module and the pressure sensor 156 are all designed by mine intrinsic safety, and the application in the field of coal mines is safe and reliable.

As shown in fig. 6, the filter 102 comprises an air pipe, a first-stage filter module 21, a first-stage filter screen frame 22, a filter housing 23, a second-stage filter module 24 and an air blocking head 25, wherein a first end of the air pipe is connected with an end portion of the corrugated hose 13 through an internal thread nut 14, a second end of the air pipe is connected with the breathing mask 103 through a quick rotating joint 158, the air blocking head 25 is provided with a second end of the air pipe, the filter housing 23 is arranged outside the air pipe, the second-stage filter module 24 is filled in the filter housing 23, the first-stage filter screen frame 22 is of an annular structure, the first-stage filter screen frame 21 covers a surrounding area in the middle of the first-stage filter screen frame 22, and the first-stage filter screen frame 22 can be buckled in an opening area outside the filter housing 23.

The primary filter module 21 is housed in a primary filter screen frame 22 and is secured in a filter housing 23 along with a secondary filter module 24 to form a secondary filter system for the air. One side of the air transmission pipeline of the filter housing 23 is blocked by an air blocking head 25 to form a unidirectional air transmission pipeline, one side of the filter housing 23 is provided with a quick rotary joint 158 for being fixed with the breathing mask 103, and the other side is provided with an external thread stud for being fixed with the corrugated hose 13. When the dust concentration is large, an antistatic dust-proof sleeve can be arranged outside the filter to prevent the filter from being blocked too fast.

As shown in fig. 7, the breathing mask 103 has an inverted T-shaped structure, the two wings at the mouth of the breathing mask 103 extend backward, and the two wings at the mouth of the breathing mask 103 are respectively connected with the host 101 and the filter 102. The main body of the breathing mask 103 is a silica gel mask 33. The two wings at the mouth of the breathing mask 103 are respectively provided with an outer taper sleeve joint 31, and the position of the silica gel mask 33 corresponding to the mouth is provided with a 32 breathing valve.

As shown in fig. 8, the micro fan 12 is a variable frequency fan, the control unit includes a CPU control module 40, a man-machine interaction module 41, and a power module 42, the air duct unit 155 has a pressure balancing film 157 covering the cross section of the air duct unit, a pressure sensor 156 is attached to the pressure balancing film 157, the CPU control module 40 is used as a core, the CPU control module 40 is respectively electrically connected with the man-machine interaction module 41, the power module 42, the micro fan 12, and the pressure sensor 156, the pressure sensor 156 is used for measuring the pressure of the air in the internal pipeline and transmitting the pressure signal to the CPU control module 40 through a cable, and the CPU control module 40 further transmits a control signal to the micro fan 12 through analyzing the pressure signal to adjust the air volume.

The CPU control module 40 monitors the air pressure in the breathing mask in real time through the pressure sensor 156, and continuously adjusts the air supply amount of the micro fan 12 according to the pressure feedback value, so that the inside of the mask always maintains a positive pressure state relative to the external air pressure. The power module 42 is used for system power.

As shown in fig. 9, the man-machine interaction module 41 includes a keypad 152 disposed on a controller housing 153, and the keypad 152 includes a power-on key 411, a test key 412, three power indicator lamps 413 for displaying the remaining power of the power module 42, a filter indicator lamp 414, and a test indicator lamp 415.

Referring to fig. 8-10, the power indicator 413 is three yellow LED lamps, and the three lamps are turned on to indicate that the power remains 85% -100%; the two lamps are lighted to show the residual electric quantity of 25% -85%; one lamp is lighted to indicate that the electric quantity is 5% -25%; the lamp is turned off completely to indicate that the electric quantity is less than 5%. The cartridge indicator light 414 is a yellow/green LED light, and when the cartridge performance is good, the cartridge indicator light 414 is green, and when the cartridge is blocked or otherwise abnormal, the cartridge indicator light 414 is yellow. The test indicator 415 is an orange LED light that lights up to indicate that the system is in a test state and is turned off after exiting the test state.

As shown in fig. 10, the circuit of the man-machine interaction module 41 is as follows, pins 1 and 2 of the wiring terminal J1 are connected with the start key SW1 and the test key SW2, pins 3, 4, 5, 6 and 7 of the wiring terminal J1 are connected with the light emitting diodes (LED 1, LED2, LED3, LED4 and LED 5), and pin 8 of the wiring terminal J1 is grounded; j1 and J2 are internally connected through a flat cable;

the 1 pin of the wiring terminal J2 is grounded, the 2 pin series resistor R6 of the J2 is connected with the LED5 pin of the CUP control module 40, the 3 pin series resistor R8 of the J2 is connected with the LED4 pin of the CUP control module, the 4 pin series resistor R10 of the J2 is connected with the LED3 pin of the CUP control module, the 5 pin series resistor R11 of the J2 is connected with the LED2 pin of the CUP control module, the 6 pin series resistor R12 of the J2 is connected with the LED1 pin of the CUP control module, the 7 pin series resistor R14 of the J2 is connected with the K1 pin of the CUP control module, the 8 pin series resistor R15 of the J2 is connected with the K2 pin of the CUP control module, the 7 pin series resistor R3 of the J2 is connected with the power VCC, and the 8 pin series resistor R4 of the J2 is connected with the power VCC;

the LED control module comprises a voltage stabilizing tube TS2, a CUP control module, an LED2 pin, a CUP control module, a voltage stabilizing tube TS2, a CUP control module and a CUP control module, wherein the 1 pin of the voltage stabilizing tube TS2 is connected with the LED2 pin, the 3 pin of the voltage stabilizing tube TS2 is connected with the LED3 pin of the CUP control module, the 4 pin of the voltage stabilizing tube TS2 is connected with the LED5 pin of the CUP control module, and the 6 pin of the voltage stabilizing tube TS2 is connected with the LED4 pin of the CUP control module; the 1 pin of the voltage stabilizing tube TS3 is connected with a power supply, the 3 pin of the voltage stabilizing tube TS3 is connected with the LED1 pin of the CUP control module, the 4 pin of the voltage stabilizing tube TS3 is connected with the K2 pin of the CUP control module 40, and the 6 pin of the voltage stabilizing tube TS3 is connected with the K1 pin of the CUP control module; pins 2 and 5 of the voltage stabilizing tubes TS2 and TS3 are grounded.

Preferably, the control unit further comprises a communication module 43 for transmitting wearer information and pressure data in the dust mask, wherein the communication module 43 comprises a Bluetooth module, a WiFi module, a ZigBee module or a LoRa module, or a combination of the above modules

Example 2

In a second embodiment, a method for wearing a dust-filtering and air-blowing dust mask for mines, using the dust-filtering and air-blowing dust mask for mines in embodiment 1, comprises the following steps:

step A1, wearing a breathing mask 103 on the mouth and nose of a user, enabling the inner side edge of the breathing mask 103 to be attached to the face, and wearing a head lacing 104 on the head, the shoulders and the neck of the user after the breathing mask 103 is worn, so that the breathing mask 103 is comfortably fixed on the face;

step A2, waking up and starting the micro fan 12;

step A3, sleeving the assembly body from the rear side of the neck and surrounding the neck of the shoulder, holding the outer cone sleeve joint 31 at one side of the breathing mask 103 by one hand, holding the quick rotary joint 158 of the host 101 by the other hand, pushing the outer cone sleeve joint 31 into the quick rotary joint 158, and then rotating the outer ring 1581 to connect the host 101 with the breathing mask 103;

step A4, holding the outer cone joint 31 on the other side of the breathing mask 103 with one hand, holding the quick rotary joint 158 of the filter 102 with the other hand, pushing the outer cone joint 31 into the quick rotary joint 158, and then rotating the outer ring 1581 to connect the filter 102 with the breathing mask 103.

The method for wearing the dust mask will be described in detail with reference to example 1, in which the breathing mask 103 is worn first: the annular headband with the buckles is sleeved on the neck, and then the head fixing ring is sleeved on the top of the head and the back of the brain.

The breathing mask 103 is adjusted to be in perfect fit with the face by adjusting the position of the face, and then the buckle is appropriately adjusted to be comfortably fixed to the face by the breathing mask 103. With helmets (if needed). Pressing the power-on key 411 causes the host 101 to transition from the sleep state to the standby state. The main machine 101 is worn from the neck, one hand holds the outer cone sleeve joint 31 at the end of the breathing mask 103, and the other hand holds the main machine 101 controller 15 to push the joint into the side connecting port; the outer cone of the other end of the breathing mask 103 is held by one hand to the connector 31, and the other hand holds the filter 102 to push the connector into the side connection port. The dust mask can automatically supply air when breathing normally.

Example 3

In a third embodiment, a method for testing a dust-filtering and air-supplying dust mask for mine, using the dust-filtering and air-supplying dust mask for mine in embodiment 1, comprises the following steps:

step B1, wearing a dust filtering and air supplying type dust mask for mines on the head of a user, and pressing a start key 411 to start a host 101;

step B2, after the wearer breathes normally, the system starts to adjust the air supply quantity according to the breathing quantity;

step B3, after the test key 412 is pressed for a set time, entering a test mode, starting the micro fan 12 and blowing the air at the maximum air volume, pressing the test key 412 to reduce the primary air volume and blowing the air, pressing the test key 412 to blow the micro fan again at the maximum air volume, and circulating in this way;

step B4, the test mode is exited by pressing the start button 411 in the test mode.

The foregoing is merely exemplary of the present invention, and those skilled in the art can make many variations in the specific embodiments and application scope according to the spirit of the present invention, as long as the variations do not depart from the spirit of the invention.

Claims (9)

1. Mining dust filtration air supply formula dust mask, its characterized in that: comprising

The breathing mask covers the mouth and the nose of the user, a breathing exchange space is formed between the breathing mask and the mouth and the nose of the user, and an exhalation valve is arranged on the breathing mask;

the head lacing is connected to the breathing mask and used for assisting the breathing mask to cover the mouth and nose of a user in a mode of being fixed on the head, the shoulders and the neck of the user;

the main body of the main machine is of a tubular structure, and the main machine is internally provided with a micro fan;

the filter is connected to one end part of the tubular structure of the main body of the main machine, and the main machine and the filter form a tubular assembly body;

the breathing mask is of an inverted T-shaped structure, two wings at the mouth of the breathing mask extend backwards, and the two wings at the mouth of the breathing mask are respectively connected with the host machine and the filter;

the assembly body is connected with the breathing mask to enable the breathing exchange space to be communicated with the main body pipe of the assembly body, the breathing mask and the assembly body form a surrounding structure, the assembly body is arranged on the neck of the shoulder of a user, and external air is driven by the micro fan to enter the host through the filter and is finally conveyed to the breathing exchange space;

the main machine further comprises a corrugated hose, an internal thread nut and a controller, the corrugated hose is sleeved outside the micro fan, the internal thread nut is arranged at two ends of the corrugated hose through internal threads, a first end of the controller and a first end of the filter are respectively connected at two ends of the corrugated hose through the internal thread nut, and a second end of the controller and a second end of the filter are respectively connected with the breathing mask;

the controller also comprises a control unit, a controller shell, an air passage unit and a quick rotary joint, wherein the control unit is electrically connected with the micro fan and used for controlling the micro fan, a first end of the air passage unit is connected with the end part of the corrugated hose through an internal thread nut, the quick rotary joint is arranged at a second end of the air passage unit, the second end of the air passage unit is connected with the breathing mask through the quick rotary joint, the controller shell is hung outside the air passage unit, a part of the control unit component is arranged in the controller shell, and the control unit is used for detecting the gas pressure in a host and controlling the working state of the micro fan;

the filter comprises an air pipeline, a first-stage filter module, a first-stage filter screen frame, a filter shell, a second-stage filter module and an air blocking plug, wherein the first end of the air pipeline is connected with the end part of the corrugated hose through an internal thread nut, the second end of the air pipeline is connected with a breathing mask through a quick rotary joint, the air blocking plug is arranged at the second end of the air pipeline, the filter shell is arranged outside the air pipeline, the second-stage filter module is filled in the filter shell, the first-stage filter screen frame is of an annular structure, the first-stage filter module covers a surrounding area in the middle of the first-stage filter screen frame, and the first-stage filter screen frame can be buckled in an opening area outside the filter shell;

the respiratory mask is provided with a conical outer taper sleeve joint, the quick rotary joint comprises an outer ring, a spring ring and an inner taper sleeve joint, wherein the outer ring is sleeved outside the inner taper sleeve joint, spring clamping grooves are formed in the outer ring and the inner taper sleeve joint, the spring ring is arranged in the spring clamping grooves, an annular groove is formed in the outer annular surface of the outer taper sleeve joint, the outer ring rotates relative to the inner taper sleeve joint to adjust the size of the spring ring, the inner taper sleeve joint is sleeved on the outer annular surface of the outer taper sleeve joint, and when the spring ring is embedded into the annular groove, the outer taper sleeve joint is sealed with the inner taper sleeve joint through the conical surface.

2. The mining dust filtering and air-supplying type dust mask according to claim 1, wherein: the micro fan is a variable frequency fan, the control unit comprises a CPU control module, a man-machine interaction module and a power supply module, the air channel unit is provided with a pressure balance film covering the cross section of the air channel unit, a pressure sensor is attached to the pressure balance film, the CPU control module is used as a core, the CPU control module is respectively and electrically connected with the man-machine interaction module, the power supply module, the micro fan and the pressure sensor, the pressure sensor is used for measuring the gas pressure of an internal pipeline and transmitting a pressure signal to the CPU control module through a cable, and the CPU control module is used for transmitting a control signal to the micro fan through analyzing the pressure signal so as to adjust the air supply quantity;

the CPU control module, the key board, the battery module and the pressure sensor are designed through mine intrinsic safety.

3. The mining dust filtering and air supplying type dust mask according to claim 2, wherein: the man-machine interaction module comprises a key board arranged on the controller shell, wherein the key board comprises a start key, a test key, three electric quantity indicating lamps for displaying the residual electric quantity of the power supply module, a filter element indicating lamp and a test indicating lamp.

4. A mining dust filtering and air-supplying dust mask according to claim 3, wherein: the circuit of the man-machine interaction module is as follows, pins 1 and 2 of the wiring terminal J1 are respectively connected with a test key SW2 and a start key SW1, pins 3, 4, 5, 6 and 7 of the wiring terminal J1 are respectively connected with light emitting diodes LED1, LED2, LED3, LED4 and LED5, and pin 8 of the wiring terminal J1 is grounded; j1 and J2 are internally connected through a flat cable;

the 1 pin of the wiring terminal J2 is grounded, the 2 pin serial resistor R6 of the J2 is connected with the LED5 pin of the CPU control module, the 3 pin serial resistor R8 of the J2 is connected with the LED4 pin of the CPU control module, the 4 pin serial resistor R10 of the J2 is connected with the LED3 pin of the CPU control module, the 5 pin serial resistor R11 of the J2 is connected with the LED2 pin of the CPU control module, the 6 pin serial resistor R12 of the J2 is connected with the LED1 pin of the CPU control module, the 7 pin serial resistor R14 of the J2 is connected with the K1 pin of the CPU control module, the 8 pin serial resistor R15 of the J2 is connected with the K2 pin of the CPU control module, the 7 pin serial resistor R3 of the J2 is connected with the power VCC, and the 8 pin serial resistor R4 of the J2 is connected with the power VCC;

the LED control module comprises a voltage stabilizing tube TS2, a CPU control module, an LED2 pin, a CPU control module and a CPU control module, wherein the 1 pin of the voltage stabilizing tube TS2 is connected with the LED2 pin, the 3 pin of the voltage stabilizing tube TS2 is connected with the LED3 pin of the CPU control module, the 4 pin of the voltage stabilizing tube TS2 is connected with the LED5 pin of the CPU control module, and the 6 pin of the voltage stabilizing tube TS2 is connected with the LED4 pin of the CPU control module; the 1 pin of the voltage stabilizing tube TS3 is connected with a power supply, the 3 pin of the voltage stabilizing tube TS3 is connected with the LED1 pin of the CPU control module, the 4 pin of the voltage stabilizing tube TS3 is connected with the K2 pin of the CPU control module, and the 6 pin of the voltage stabilizing tube TS3 is connected with the K1 pin of the CPU control module; pins 2 and 5 of the voltage stabilizing tubes TS2 and TS3 are grounded.

5. The mining dust filtering and air-supplying type dust mask according to claim 1, wherein: the miniature fan comprises a PCB board, a fan upper cover, fan blades, a motor shaft, a fan housing, a permanent magnet rotor, a motor housing rotor lining, a soft magnetic ring, a stator coil and a motor housing, wherein the motor housing is arranged inside the fan housing, the motor housing and the fan housing are both tubular and coaxially arranged, an air circulation channel is formed between the motor housing and the fan housing, the motor shaft is arranged at the axial position of the motor housing through a bearing, the permanent magnet rotor is fixedly sleeved on the motor shaft, the motor housing rotor lining, the soft magnetic ring, the stator coil and the PCB board are arranged in the motor housing, the first end part of the motor shaft extends out of the motor housing, and the fan blades are arranged at the position, close to the first end part of the motor shaft, of the fan housing and cover the fan blades.

6. The mining dust filtering and air-supplying type dust mask according to claim 1, wherein: the host machine is provided with a neck protection pad, the neck protection pad is close to the back side of the neck of a user, and the joint surface of the neck protection pad is a curved surface.

7. The mining dust filtering and air supplying type dust mask according to claim 2, wherein: the control unit also comprises a communication module for transmitting the information of the wearer and the pressure data in the dust mask, wherein the communication module comprises a Bluetooth module or a WiFi module or a ZigBee module or a LoRa module, and the communication module can also be a combination of the different modules.

8. A method for wearing a dust-filtering air-supplying type dust mask for mines, which uses the dust-filtering air-supplying type dust mask for mines according to claim 1, and is characterized by comprising the following steps:

step A1, wearing a breathing mask on the mouth and nose of a user, enabling the edge of the inner side of the breathing mask to be attached to the face, and wearing head ties on the head and the shoulder and neck of the user after the breathing mask is worn, so that the breathing mask is comfortably fixed on the face;

a2, waking up and starting the micro fan;

step A3, sleeving the assembly body from the rear side of the neck and surrounding the assembly body on the neck of the shoulder, holding an outer cone sleeve joint at one side of the breathing mask by one hand, holding a quick rotary joint of the host by the other hand, pushing the outer cone sleeve joint into the quick rotary joint, and rotating an outer ring to connect the host with the breathing mask;

and A4, holding the outer cone sleeve joint at the other side of the breathing mask by one hand, holding the quick rotary joint of the filter by the other hand, pushing the outer cone sleeve joint into the quick rotary joint, and then rotating the outer ring to connect the filter with the breathing mask.

9. A method for testing a dust-filtering air-supplying type dust mask for mines, which uses the dust-filtering air-supplying type dust mask for mines according to claim 3 or 4, and is characterized by comprising the following steps:

step B1, wearing a dust filtering and air supplying type dust mask for mines on the head of a user, and pressing a start key device to start a host;

step B2, after the wearer breathes normally, the system starts to adjust the air supply quantity according to the breathing quantity;

step B3, after a test key is pressed for a set time, entering a test mode, starting the micro fan and blowing the air with the maximum air quantity, then pressing the test key to reduce the primary air quantity for blowing, and pressing the test key to re-blow the micro fan with the maximum air quantity for blowing, thus the cycle is performed;

and step B4, pressing a start key in the test mode to exit the test mode.