Self-rescue device for drowning prevention of coal mine well

Abstract

The invention relates to the technical field of self-rescue in coal mine wells, and discloses a self-rescue device for drowning prevention in coal mine wells, which comprises a self-rescuer shell, a shoulder strap and a waist strap are respectively arranged on the self-rescuer shell, a life buoy is arranged on the outer surface of the self-rescuer shell, and an oxygen bottle group is detachably mounted in the self-rescuer shell. A cleaning tank is fixedly installed in the self-rescuer shell, a first one-way valve is arranged at the top of the cleaning tank, a valve hole is formed in the first one-way valve, and the top of the first one-way valve fixedly communicates with a breathing air bag. According to the self-rescue device for drowning prevention of the coal mine well, comprehensive optimization of the carbon dioxide absorption process is achieved through the dustproof assembly, the material turning and shifting net push-pull mechanism and the guide limiting mechanism; the absorption efficiency of the carbon dioxide is remarkably improved by increasing the contact area of the carbon dioxide and the carbon dioxide absorbent, reducing the obstruction of a precipitation layer, optimizing the flowing of airflow, reducing the raising of dust and the blockage of meshes and the like.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine self-rescue, in particular to a self-rescue device for preventing drowning in coal mines. Background Art

[0002] During work underground in a coal mine, there may be a variety of water sources, such as aquifers, fault water, old empty water, etc. These water sources may suddenly flow into the mine during the mining process. Although coal mines are usually equipped with drainage systems to deal with water disasters, the drainage capacity is often limited. When the amount of water exceeds the drainage capacity, a flood will occur. Therefore, in order to prevent drowning, it is necessary to use a self-rescue device for self-rescue before the arrival of outside rescue. The self-rescue device currently commonly used in coal mines is an isolated compressed oxygen self-rescuer. This isolated compressed oxygen self-rescuer is connected to the human respiratory system to form an isolated closed-circuit breathing system. After the user's exhaled gas passes through a purifier (usually using calcium hydroxide as an absorbent) to absorb carbon dioxide, the remaining oxygen is mixed with the fresh oxygen output by the pressure reducer and supplied to the user for inhalation again. In this way, the user can continue to obtain breathable oxygen without directly inhaling outside air.

[0003] The existing carbon dioxide absorbent is generally placed in a clean tank inside the shell of an isolated compressed oxygen self-rescuer. This natural convection method in a static state has significant limitations. First, the diffusion of carbon dioxide mainly depends on natural convection, which leads to a relatively limited contact area between it and the calcium hydroxide particles. Carbon dioxide will first react with the uppermost calcium hydroxide particles in the clean tank. The speed of this diffusion reaction is relatively slow. Secondly, as the reaction proceeds, it is easily hindered by a precipitation layer. This precipitation layer mainly comes from the calcium carbonate precipitate produced by the reaction of calcium hydroxide and carbon dioxide. This layer of precipitation may hinder the carbon dioxide from further contacting with the unreacted calcium hydroxide particles in the lower layer (having a certain blocking effect on the infiltration of carbon dioxide), thereby further reducing the reaction rate, which may easily lead to the inability to effectively reduce the carbon dioxide concentration inside the self-rescuer. Users may feel shortness of breath or insufficient oxygen supply when wearing the self-rescuer. For this reason, we propose a self-rescue device for preventing drowning in coal mines. Summary of the invention

[0004] The purpose of the present invention is to provide a self-rescue device for preventing drowning in coal mines to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a self-rescue device for preventing drowning in coal mines, comprising a self-rescue device shell, a shoulder strap and a waist belt are respectively arranged on the self-rescue device shell, a life buoy is arranged on the outer surface of the self-rescue device shell, an oxygen cylinder group is detachably installed inside the self-rescue device shell, a purification tank is fixedly installed inside the self-rescue device shell, a first one-way valve is arranged on the top of the purification tank, a valve hole is opened on the first one-way valve, a breathing air bag is fixedly connected to the top of the first one-way valve, and the oxygen cylinder in the oxygen cylinder group supplies oxygen to the breathing air bag through a pressure reducing valve, a mouthpiece is fixedly connected to the top of the breathing air bag, a nasal plug is arranged on the outer surface of the breathing air bag, an inhalation valve and an exhalation valve are respectively arranged on one side of the mouthpiece on the breathing air bag, and the exhalation valve is away from the mouthpiece on one side A hose is fixedly connected to the end thereof, a connecting pipe is arranged at the bottom of the first one-way valve, a guide pipe rack is fixedly connected to the connecting pipe, an air flow channel is fixedly connected to the inner side of the cleaning tank, and the air flow channel is connected to the guide pipe rack, a plurality of groups of second one-way valves are arranged on the air flow channel, a guide air bag is fixedly connected to the bottom end of the guide pipe rack, a dustproof component is arranged inside the cleaning tank, a material turning and net pushing and pulling mechanism is arranged on the cleaning tank, a guide limiting mechanism is arranged inside the guide pipe rack, a plug is arranged at the bottom of the cleaning tank, and the plug is designed here to be directly screwed from the outside, and the used carbon dioxide absorbent (generally calcium hydroxide particles) in the cleaning tank can be replaced after it is unscrewed, and the plug can be in a stable state after being stably screwed into the bottom of the cleaning tank, and the sealing performance is good.

[0006] Preferably, the oxygen cylinder group includes an oxygen cylinder, a pressure gauge, a valve knob, and an air supply pressure plate, and the oxygen cylinders in the oxygen cylinder group are connected to the breathing airbag through a pressure reducing valve.

[0007] Preferably, both the inhalation valve and the exhalation valve are one-way valves, and their airflow directions are opposite, wherein the exhalation valve is fixedly connected to the connecting pipe at the bottom of the first one-way valve through a hose arranged inside the breathing airbag, and the valve hole opened on the surface of the first one-way valve only allows airflow to enter the breathing airbag from bottom to top.

[0008] Preferably, there are two groups of the guide tube racks, and the guide airbags connected at the bottom of the two groups of the guide tube racks are respectively located in relatively independent spaces on both sides of the purification tank, and the guide airbags in the spaces can undergo a certain degree of telescopic deformation.

[0009] Preferably, the dustproof component includes a fixed cylinder fixedly connected to the inner side of the purification tank, a rubber spring is arranged in the fixed cylinder, a dust filter is arranged on the top of the rubber spring, and a rubber strip is arranged at the edge of the dust filter, the rubber strip is basically in contact with the inner wall of the purification tank, and the dustproof component can prevent the dust generated by the carbon dioxide absorbent when being flipped and stirred from entering the breathing airbag.

[0010] Preferably, the material turning, net prying and pushing-pull mechanism includes a servo motor fixedly mounted on the outer surface of the purification tank, the output end of the servo motor is fixedly connected to a screw, and the end of the screw away from the servo motor is fixedly connected to a driving gear. The material turning, net prying and pushing-pull mechanism can turn the carbon dioxide absorbent (calcium hydroxide particles) stored in the purification tank while moving the dust filter net to reduce dust adhesion and clogging, and can also stretch and squeeze the guide airbag to accelerate the flow of carbon dioxide airflow and improve its absorption rate with the carbon dioxide absorbent.

[0011] Preferably, the inner surface of the cleaning tank is rotatably connected to a transverse shaft, and the end of the transverse shaft close to the driving gear is fixedly connected to a transmission gear, and the outer surface of the transmission gear is meshingly connected to the outer surface of the driving gear, and the outer surface of the transverse shaft is provided with a plurality of groups of evenly distributed material removing claws.

[0012] Preferably, a lower gear is fixedly sleeved on the outer surface of the transverse shaft, a rack rack is slidably connected to the inner side of the purification tank, and the outer surface of the rack rack is meshedly connected to the outer surface of the lower gear, and the top of the rack rack is fixedly connected to the bottom of the guide airbag.

[0013] Preferably, the inner wall of the cleaning tank is rotatably connected with a longitudinal axis, the outer surface of the longitudinal axis is provided with three groups of evenly distributed mesh strips, and the outer surface of the longitudinal axis is fixedly sleeved with an upper gear.

[0014] Preferably, a strip hole is opened on the inner side of the purification tank close to the screw, an L-shaped rod is threadedly sleeved on the outer surface of the screw, and the outer surface of the L-shaped rod is slidably connected to the inner side of the strip hole, and a rack plate is fixedly connected to the end of the L-shaped rod away from the screw, and the outer surface of the rack plate is meshingly connected to the outer surface of the upper gear.

[0015] Preferably, the guide and limiting mechanism includes a fixed block arranged on the inner wall of the guide tube frame, a limit spring is arranged on the outer surface of the fixed block, a piston is arranged at one end of the limit spring away from the fixed block, and the piston is slidably connected to the inner wall of the guide tube frame. When the guide airbag is stretched or compressed, the flow of carbon dioxide in the hose can be accelerated through the guide and limiting mechanism. Compared with the natural convection method, the pressure is changed at the same time to accelerate the airflow circulation, thereby further improving the rate at which carbon dioxide is absorbed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention drives the screw rod through a servo motor to drive the material-moving claw to flip and stir the stationary carbon dioxide absorbent in the purification tank, so that the carbon dioxide absorbent is converted from a static state to a moving state, thereby significantly increasing the contact area between carbon dioxide and calcium hydroxide particles. Compared with the traditional static state, this dynamic contact mode greatly improves the contact area between carbon dioxide and the carbon dioxide absorbent. At the same time, this dynamic agitation effectively reduces the accumulation of calcium carbonate precipitates produced by the reaction of the carbon dioxide absorbent with carbon dioxide on the upper layer of the carbon dioxide absorbent inside the purification tank, avoiding the obstruction of the precipitation layer to the infiltration of carbon dioxide, ensuring that carbon dioxide can smoothly contact and react with the calcium hydroxide particles in the lower layer, further improving the absorption efficiency, and ensuring that the carbon dioxide concentration inside the self-rescuer is effectively absorbed and reduced.

[0017] Secondly, by designing the guide airbag, airflow channel and related guide and limiting mechanisms, the airflow is optimized, so that the device can accelerate the airflow in the hose and the purification tank, so that the exhaled carbon dioxide and oxygen can be distributed more quickly into the purification tank from different directions, and fully contact and react with the calcium hydroxide particles. This design not only improves the absorption efficiency, but also prolongs the continuous supply of oxygen inside the self-rescuer.

[0018] Finally, the design of the dust filter and rubber spring effectively prevents the dust generated by the calcium hydroxide particles during the flipping process from rising, thus avoiding the dust contamination of the breathing airbag. At the same time, through the linkage mechanism of the L-shaped rod, rack plate, upper gear and mesh plate, the dust filter is periodically beaten, which effectively reduces the blockage of the dust filter mesh and ensures the smooth flow of carbon dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the breathing airbag of the present invention; Figure 3 This is a schematic diagram of the internal structure of the cleaning tank of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the connecting pipe of the present invention; Figure 5 It is a schematic diagram of the surface structure of the dust filter of the present invention; Figure 6 This is a schematic diagram of the outer surface structure of the cleaning tank of the present invention; Figure 7 This is a schematic diagram of the structure of the cleaning tank of the present invention near the strip-shaped hole; Figure 8 This is a schematic diagram of the connection structure of the flow guide pipe rack of the present invention; Fig. 9 This is a schematic diagram of the internal structure of the flow guide tube rack of the present invention; Fig.10It is a schematic diagram of the airflow flow inside the guide tube frame during the expansion and contraction process of the guide airbag of the present invention.

[0020] In the figure: 1-self-rescuer housing; 2-shoulder strap; 3-waist belt; 4-lifebuoy; 5-oxygen cylinder group; 6-purifying tank; 7-first one-way valve; 8-valve hole; 9-breathing airbag; 10-mouthpiece; 11-nasal plug; 12-inhalation valve; 13-exhalation valve; 14-hose; 15-connecting pipe; 16-guiding pipe rack; 1601-fixing block; 1602-limiting spring; 1603-piston; 17-air flow channel; 18 - the second one-way valve; 19- the guide air bag; 20- the fixing cylinder; 21- the rubber spring; 22- the dust filter; 23- the servo motor; 24- the screw; 25- the driving gear; 26- the transverse axis; 27- the transmission gear; 28- the material-moving claw; 29- the lower gear; 30- the rack; 31- the longitudinal axis; 32- the screen-moving strip plate; 33- the upper gear; 34- the strip hole; 35- the L-shaped rod; 36- the rack plate; 37- the plug. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-10The present invention provides a technical solution: a self-rescue device for preventing drowning in coal mines, comprising a self-rescue device shell 1, on which a shoulder strap 2 and a waist belt 3 are respectively arranged, the shoulder strap 2 and the waist belt 3 can be hung on the shoulder and tied around the waist respectively, so as to stabilize the self-rescue device shell 1 in front of the chest, a life buoy 4 is arranged on the outer surface of the self-rescue device shell 1, and the design of this inflatable life buoy 4 can ensure that the head and neck of the user are out of the water when there is not much water accumulation, an oxygen cylinder group 5 is detachably installed inside the self-rescue device shell 1, and the internal fixed installation of the self-rescue device shell 1 A cleaning tank 6 is provided, the bottom of the inner side of the cleaning tank 6 is of arc-shaped design, a first one-way valve 7 is provided on the top of the cleaning tank 6, a valve hole 8 is provided on the first one-way valve 7, a breathing air bag 9 is fixedly connected to the top of the first one-way valve 7, and the oxygen cylinder in the oxygen cylinder group 5 supplies oxygen to the breathing air bag 9 through a pressure reducing valve, a mouthpiece 10 is fixedly connected to the top of the breathing air bag 9, a nasal plug 11 is provided on the outer surface of the breathing air bag 9, and the mouthpiece 10 is located on one side of the breathing air bag 9 and is respectively provided with an inhalation valve 12 and an exhalation valve 13, and the exhalation valve 13 is fixed at one end away from the mouthpiece 10 A hose 14 is connected (the hose 14 and the airflow in the breathing airbag 9 will not penetrate each other in the breathing airbag 9), a connecting pipe 15 is arranged at the bottom of the first one-way valve 7, and the bottom opening of the inner side of the connecting pipe 15 is arched. This design is to balance the airflow in the hose 14 and the cleaning tank 6 to a certain extent when the guide pipe holder 16 evacuates or exhausts the connecting pipe 15 (at the same time, accelerate the airflow in the hose 14 and the cleaning tank 6), the connecting pipe 15 is fixedly connected with the guide pipe holder 16, and the inner side of the cleaning tank 6 is fixedly connected with the airflow channel 17 , and the air flow channel 17 is connected with the guide pipe rack 16, a plurality of groups of second one-way valves 18 are arranged on the air flow channel 17, the bottom end of the guide pipe rack 16 is fixedly connected with a guide air bag 19, a dustproof component is arranged inside the cleaning tank 6, a material turning and net pushing and pulling mechanism is arranged on the cleaning tank 6, a guide limiting mechanism is arranged inside the guide pipe rack 16, and a plug 37 is arranged at the bottom of the cleaning tank 6. After the self-rescue device is used, the plug 37 can be rotated to open it, so as to replace the used carbon dioxide absorbent in the cleaning tank 6 from the bottom.

[0023] Through the above technical scheme, during the use of the entire anti-drowning self-rescue device, the user needs to first hang the shoulder strap 2 on the shoulder and neck and tie the waist belt 3 around the waist (the shoulder strap 2 and the waist belt 3 are adjustable in length), so as to stabilize the self-rescue device shell 1 in front of the chest. At this time, the inflated life buoy 4 is under the two armpits. When the water in the coal mine is not deep, there is no need to turn on the switch on the oxygen cylinder group 5 temporarily, and normal breathing can be maintained by relying on the outside air. When the water accumulates to the danger zone (or you feel shortness of breath), you can immediately hold the mouthpiece 10 in your mouth and squeeze your nose with the nasal plug 11. Finally, open the valve knob on the oxygen cylinder group 5 to allow the oxygen cylinder to vent the breathing gas through the pressure reducing valve. The bag 9 is inflated to supply oxygen for normal breathing (the correct way to wear a traditional isolated compressed oxygen self-rescuer). During this process, the carbon dioxide absorbent (generally calcium hydroxide particles) stationary in the purification tank 6 can be turned over and shifted through the flipping and net pushing and pulling mechanism in conjunction with the dustproof component and the guide limit mechanism, so that it is converted from a static state to a dynamic motion process, and the circulation of internal airflow is accelerated to increase the contact area between the exhaled carbon dioxide and the carbon dioxide absorbent, thereby increasing the rate at which carbon dioxide is absorbed. Finally, the dust raised during the stirring process is blocked to prevent it from entering the breathing airbag 9 through the first one-way valve 7 and causing breathing disorders.

[0024] Specifically, the oxygen cylinder group 5 includes an oxygen cylinder, a pressure gauge, a valve knob, and an air supply pressure plate, and the oxygen cylinder in the oxygen cylinder group 5 is connected to the breathing airbag 9 through a pressure reducing valve.

[0025] Through the above technical scheme, the oxygen cylinder, pressure gauge, valve knob and air supply pressure plate in the oxygen cylinder group 5 are all normal component configurations of the existing isolated compressed oxygen self-rescuer. The pressure gauge can observe the pressure inside the oxygen cylinder, turning the valve knob can inject the oxygen in the oxygen cylinder into the breathing bag 9 through the pressure reducing valve, and the air supply pressure plate controls the rate at which oxygen is injected into the breathing bag 9.

[0026] Specifically, the inhalation valve 12 and the exhalation valve 13 are both one-way valves, and the airflow directions of the two are opposite. The exhalation valve 13 is fixedly connected to the connecting pipe 15 at the bottom of the first one-way valve 7 through a hose 14 arranged inside the breathing airbag 9, and the valve hole 8 opened on the surface of the first one-way valve 7 only allows the airflow to enter the breathing airbag 9 from bottom to top.

[0027] Through the above technical solution, when the oxygen cylinder group 5 supplies oxygen to the breathing bag 9 for inflation, the breathing bag 9 expands, and the oxygen in the breathing bag 9 can be inhaled through the inhalation valve 12 on the mouthpiece 10, while the exhaled carbon dioxide enters the hose 14 through the exhalation valve 13, and finally enters the purification tank 6 through the connecting pipe 15, and is absorbed by the carbon dioxide absorbent stored in the purification tank 6.

[0028] Specifically, there are two groups of guide tube racks 16, and the guide air bags 19 connected at the bottom of the two groups of guide tube racks 16 are respectively located in relatively independent spaces on both sides of the purification tank 6, and the guide air bags 19 in the spaces can undergo a certain degree of telescopic deformation.

[0029] Through the above technical solution, the guide airbags 19 are evenly distributed near the left and right sides of the purification tank 6. When the guide airbags 19 are stretched or compressed, the deformation process will accelerate the airflow in the guide tube frame 16.

[0030] Specifically, the dustproof component includes a fixed cylinder 20 fixedly connected to the inner side of the cleaning tank 6, a rubber spring 21 is arranged in the fixed cylinder 20, a dust filter net 22 is arranged on the top of the rubber spring 21, and a rubber strip is arranged at the edge of the dust filter net 22, and the rubber strip is basically in contact with the inner wall of the cleaning tank 6.

[0031] Through the above technical solution, the rubber strip at the edge of the dust filter 22 is designed to be able to move up and down basically in contact with the inner wall of the purification tank 6, and the rubber spring 21 cooperates with the fixed cylinder 20 to accelerate the vibration amplitude after the dust filter 22 is moved, thereby scattering the dust attached to the lower surface of the dust filter 22 downward. While the fixed cylinder 20 supports the rubber spring 21, the hollow design of the top can also maintain the relatively stable up and down vibration of the rubber spring 21 to a certain extent, thereby reducing the lateral swing of the rubber spring 21.

[0032] Specifically, the material turning and net pulling and pushing mechanism includes a servo motor 23 fixedly mounted on the outer surface of the cleaning tank 6 , the output end of the servo motor 23 is fixedly connected to a screw rod 24 , and the end of the screw rod 24 away from the servo motor 23 is fixedly connected to a driving gear 25 .

[0033] Through the above technical solution, when the servo motor 23 drives the screw rod 24 to rotate, on the one hand, it will drive the driving gear 25 to rotate, and on the other hand, under the relative limiting effect of the bar hole 34, the L-shaped rod 35 will slide along the bar hole 34. It should be noted here that the servo motor 23 itself carries a small battery to power it. The parameters of the servo motor 23 driving the screw rod 24 to rotate are designed, and it will periodically rotate forward and reverse.

[0034] Specifically, the inner surface of the cleaning tank 6 is rotatably connected to a transverse shaft 26, and one end of the transverse shaft 26 close to the driving gear 25 is fixedly connected to a transmission gear 27, and the outer surface of the transmission gear 27 is meshed with the outer surface of the driving gear 25, and the outer surface of the transverse shaft 26 is provided with a plurality of groups of evenly distributed material removing claws 28.

[0035] Through the above technical solution, the end of the material-moving claw 28 is designed with an arc-shaped transition to match the bottom arc-shaped design on the inner side of the cleaning tank 6, thereby reducing wear during the flipping and material-moving process of the material-moving claw 28 and reducing dead angles for material-moving, thereby maximizing the material-moving range.

[0036] Specifically, a lower gear 29 is fixedly sleeved on the outer surface of the transverse shaft 26, a rack rack 30 is slidably connected to the inner side of the purification tank 6, and the outer surface of the rack rack 30 is meshedly connected to the outer surface of the lower gear 29, and the top of the rack rack 30 is fixedly connected to the bottom of the guide airbag 19.

[0037] Through the above technical solution, the transverse shaft 26 will link the two groups of lower gears 29 on its surface to rotate synchronously during the rotation process, and the two groups of lower gears 29 will drive the rack racks 30 at the corresponding positions, thereby stretching or compressing the guide airbag 19 through the rack racks 30.

[0038] Specifically, the inner wall of the cleaning tank 6 is rotatably connected with a longitudinal shaft 31 , the outer surface of the longitudinal shaft 31 is provided with three groups of evenly distributed mesh strips 32 , and the outer surface of the longitudinal shaft 31 is fixedly sleeved with an upper gear 33 .

[0039] Through the above technical solution, the longitudinal axis 31 and the transverse axis 26 are vertically staggered (at different heights), and the rack plate 36 drives the upper gear 33 meshing with it to rotate during the transverse movement of the L-shaped rod 35, and finally enables the three sets of net-moving strips 32 to periodically beat the dust filter 22 through the longitudinal axis 31.

[0040] Specifically, a strip hole 34 is opened on the inner side of the purification tank 6 near the screw 24, an L-shaped rod 35 is threadedly sleeved on the outer surface of the screw 24, and the outer surface of the L-shaped rod 35 is slidingly connected to the inner side of the strip hole 34, and the end of the L-shaped rod 35 away from the screw 24 is fixedly connected to a rack plate 36, and the outer surface of the rack plate 36 is meshingly connected to the outer surface of the upper gear 33.

[0041] Through the above technical solution, the strip hole 34 is arranged above the dust filter 22, and the dust filter 22 can prevent dust from overflowing from the strip hole 34, wherein the length of the strip hole 34 is consistent with the thread length of the surface of the screw rod 24, thereby limiting the lateral movement distance of the L-shaped rod 35.

[0042] Specifically, the guide limiting mechanism includes a fixed block 1601 arranged on the inner wall of the guide tube rack 16, a limiting spring 1602 is arranged on the outer surface of the fixed block 1601, a piston 1603 is arranged at one end of the limiting spring 1602 away from the fixed block 1601, and the piston 1603 is slidably connected to the inner wall of the guide tube rack 16.

[0043] Through the above technical solution, the flow direction of the internal airflow of the guide airbag 19 will change during the process of being stretched and then compressed, and the position of the piston 1603 will be adjusted by air pressure, wherein the guide tube frame 16 is connected with the airflow channel 17 and the second one-way valve 18, wherein the airflow direction of the second one-way valve 18 is obliquely downward, and the airflow in the airflow channel 17 can only be discharged, but the airflow cannot be sucked into the airflow channel 17.

[0044] Working principle and process: In order to avoid drowning in coal mines, when the user uses this self-rescue device, the carbon dioxide and oxygen produced during the exhalation process will roughly move in the following directions and react as follows: 1. Exhaled gas introduction: When using exhaled gas, these gases (mainly including carbon dioxide and oxygen) are directly introduced into the purification tank 6 through the exhalation valve 13 and the breathing hose 14. In the purification tank 6, the exhaled carbon dioxide reacts chemically with the calcium hydroxide particles to generate calcium carbonate (CaCO3) and water (H2O). This reaction can be expressed as: CO2+Ca(OH)2→CaCO3↓+H2O, in which calcium carbonate exists in the form of precipitation, while water exists in gaseous or liquid form.

[0045] 2. Oxygen retention: Since oxygen does not chemically react with calcium hydroxide, it will be retained and re-integrated into the breathing airbag 9 (the oxygen returns to the breathing airbag 9 through the valve hole 8 of the first one-way valve 7). In this way, a certain concentration of oxygen is always maintained in the breathing airbag 9.

[0046] 3. Oxygen supply: At the same time, the compressed oxygen injected from the oxygen cylinder will also enter the air bag and be inhaled by the user together with the retained oxygen. In this way, workers can get a continuous oxygen supply in dangerous environments.

[0047] In order to increase the contact area and speed between carbon dioxide and the carbon dioxide absorbent (calcium hydroxide particles), and at the same time reduce the influence of calcium carbonate precipitation produced after the reaction of calcium hydroxide and carbon dioxide on the infiltration of carbon dioxide, the servo motor 23 can be turned on to drive the screw 24 to rotate, during which the driving gear 25 will drive the transmission gear 27 meshing with it to rotate, and finally link the horizontal shaft 26 to rotate. During this process, the material claw 28 will flip and stir the carbon dioxide absorbent (calcium hydroxide particles) along the inner wall of the cleaning tank 6, so that the carbon dioxide absorbent is converted from a static state to a moving state, which means that the contact area between the carbon dioxide absorbent and carbon dioxide during the movement is increased, and the calcium carbonate precipitation produced will not be affected by It is kept still on the upper layer to prevent the carbon dioxide from contacting and reacting with the carbon dioxide absorbent on the lower layer. Considering that the carbon dioxide absorbent is prone to raise a certain amount of dust during the flipping process, a dust filter 22 is designed to prevent the dust from rising and being discharged upward into the breathing airbag 9 through the valve hole 8 of the first one-way valve 7. At the same time, it prevents the dust from rising too much and causing the mesh of the dust filter 22 to be blocked, affecting the contact and absorption of carbon dioxide and the carbon dioxide absorbent (allowing carbon dioxide to basically pass through the dust filter 22 and flow downward). Therefore, when the screw 24 rotates forward and reversely, under the relative limiting effect of the strip hole 34, the L-shaped rod 35 can slide back and forth along the strip hole 34, thereby driving the rack plate 36 to move horizontally synchronously, and driving the upper gear 33 and The longitudinal shaft 31 rotates, and finally links the screen strip 32 to periodically beat the dust filter 22 during the rotation process. After the dust filter 22 is beaten, the rubber spring 21 accelerates the vibration of the dust filter 22, and then the dust attached to the lower surface of the dust filter 22 is beaten downward. During this period, the dust filter 22 is under the elastic vibration of the rubber spring 21, and it will accelerate the shaking to enhance the effect of dust dispersion, thereby reducing the blockage of the mesh of the dust filter 22. Finally, when the transverse shaft 26 rotates, the lower gear 29 on the surface of the transverse shaft 26 will rotate synchronously. In this process, the lower gear 29 will drive the meshing rack 30 to slide up and down along the inner side of the cleaning tank 6 (the space close to the left and right sides of the cleaning tank 6). During this period, the rack frame 30 will stretch and compress the guide airbag 19 (corresponding to the forward or reverse driving rotation of the screw 24 by the servo motor 23), so as to use the deformation of the guide airbag 19 (internal pressure change) to change the airflow direction in the guide tube frame 16 to accelerate the airflow in the hose 14 and the entire purification tank 6. In addition, since the exhaled carbon dioxide and oxygen in the hose 14 will enter the purification tank 6 through the connecting pipe 15, the guide tube frame 16, the airflow channel 17 and the second one-way valve 18 respectively (that is, mainly through different directions to spray carbon dioxide into the purification tank 6 to contact and react with the carbon dioxide absorbent), the airflow inside the guide tube frame 16 during this period is as follows with the deformation of the guide airbag 19 ( Fig.10 Movement shown): When the guide airbag 19 begins to be stretched, its internal space increases and gradually draws air into the guide tube rack 16, so that the area on the left side of the piston 1603 inside the guide tube rack 16 is in a low-pressure state. At the same time, due to the airflow direction restriction of the second one-way valve 18 (the airflow passing direction is obliquely downward), the airflow flow direction in the guide tube rack 16 will enter the guide airbag 19 as shown in state 1. At this time, the piston 1603 will be driven by the suction force to slide to the left and pull the limit spring 1602 to stretch. When the piston 1603 moves to the first node passing through the guide tube rack 16, the airflow can enter the airflow channel 17 and the guide airbag 19 from the guide tube rack 16 located on the right side of the piston 1603 (that is, the guide tube rack 16 and the guide airbag 19 are fully connected with the hose 14 and the purification tank 6). The airflow flow diagram is shown in Fig.10 As shown in state 2, the airflow entering the guide tube rack 16 and the guide airbag 19 is sourced from, on the one hand, being sucked from the hose 14 through the connecting pipe 15 at the top of the guide tube rack 16, and on the other hand being sucked from the inside of the purification tank 6, until the guide airbag 19 is stretched to the maximum position. At this time, the area on the left side of the piston 1603 in the guide tube rack 16 is no longer in a low-pressure state, and there is not enough suction force to "pull" the piston 1603. Therefore, under the resetting action of the limit spring 1602, the fixing block 1601 is used to basically restore the piston 1603 to its original position. Fig.10 As shown in state 3, at this time, the area inside the guide tube frame 16 located on the left side of the piston 1603 and the air flow channel 17, the second one-way valve 18 and the guide airbag 19 are in a relatively sealed state, and the pipe inside the guide tube frame 16 located on the left side of the piston 1603 is full of air flow. Finally, after the guide airbag 19 is squeezed, due to the sealing effect of the piston 1603, the area inside the guide tube frame 16 located on the left side of the piston 1603 is in a high-pressure state, and the air flow will be squeezed into the air flow channel 17 and discharged from the second one-way valve 18. Fig.10 As shown in state 4, that is, during the process of human body exhaling air flow, the air flow in the entire purification tank 6 is accelerated, and the exhaled air flow is allowed to enter the purification tank 6 through the hose 14 from different directions to react with the carbon dioxide absorbent in the movement process, thereby accelerating the absorption rate of the exhaled carbon dioxide gas and comprehensively optimizing the carbon dioxide absorption process, namely, by increasing the contact area between carbon dioxide and calcium hydroxide particles, reducing the obstruction of the precipitation layer, optimizing the air flow, preventing dust from rising and mesh clogging, etc., the carbon dioxide absorption efficiency is significantly improved, ensuring the stability of the oxygen concentration inside the self-rescuer, reducing the breathing problem felt by the user when using it, and at the same time extending the oxygen supply time.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-rescue device for preventing drowning in a coal mine, comprising a self-rescue device housing (1), characterized in that: The self-rescuer shell (1) is provided with shoulder straps (2) and waist belts (3), respectively; the outer surface of the self-rescuer shell (1) is provided with a life buoy (4); an oxygen cylinder group (5) is detachably mounted inside the self-rescuer shell (1); a purification tank (6) is fixedly mounted inside the self-rescuer shell (1); a first one-way valve (7) is arranged on the top of the purification tank (6); a valve hole (8) is provided on the first one-way valve (7); a breathing air bag (9) is fixedly connected to the top of the first one-way valve (7); and the oxygen cylinder in the oxygen cylinder group (5) supplies oxygen to the breathing air bag (9) through a pressure reducing valve; a mouthpiece (10) is fixedly connected to the top of the breathing air bag (9); a nasal plug (11) is arranged on the outer surface of the breathing air bag (9); and an inhalation valve (12) is arranged on one side of the breathing air bag (9). 12) and an exhalation valve (13), one end of the exhalation valve (13) away from the mouthpiece (10) is fixedly connected to a hose (14), a connecting pipe (15) is provided at the bottom of the first one-way valve (7), a guide pipe rack (16) is fixedly connected to the connecting pipe (15), an air flow channel (17) is fixedly connected to the inner side of the cleaning tank (6), and the air flow channel (17) is in a connected state with the guide pipe rack (16), a plurality of groups of second one-way valves (18) are provided on the air flow channel (17), a guide air bag (19) is fixedly connected to the bottom end of the guide pipe rack (16), a dustproof component is provided inside the cleaning tank (6), a material turning and net pulling mechanism is provided on the cleaning tank (6), a guide limiting mechanism is provided inside the guide pipe rack (16), and a stopcock (37) is provided at the bottom of the cleaning tank (6).

2. A self-rescue device for preventing drowning in coal mines according to claim 1, characterized in that: The oxygen cylinder group (5) comprises an oxygen cylinder, a pressure gauge, a valve knob, and an air supply pressure plate, and the oxygen cylinders in the oxygen cylinder group (5) are connected to the breathing airbag (9) via a pressure reducing valve.

3. A self-rescue device for preventing drowning in coal mines according to claim 1, characterized in that: The inhalation valve (12) and the exhalation valve (13) are both one-way valves, and the airflow directions of the two valves are opposite. The exhalation valve (13) is fixedly connected to the connecting pipe (15) at the bottom of the first one-way valve (7) through a hose (14) arranged inside the breathing airbag (9), and the valve hole (8) provided on the surface of the first one-way valve (7) only allows airflow to enter the breathing airbag (9) from bottom to top.

4. A self-rescue device for preventing drowning in coal mines according to claim 1, characterized in that: There are two groups of the guide tube racks (16), and the guide air bags (19) connected at the bottom of the two groups of the guide tube racks (16) are respectively located in relatively independent spaces on both sides of the purification tank (6), and the guide air bags (19) in the spaces can undergo a certain degree of telescopic deformation.

5. A self-rescue device for preventing drowning in coal mines according to claim 1, characterized in that: The dustproof component comprises a fixed cylinder (20) fixedly connected to the inner side of the cleaning tank (6), a rubber spring (21) being arranged in the fixed cylinder (20), a dust filter (22) being arranged on the top of the rubber spring (21), and a rubber strip being arranged at the edge of the dust filter (22), the rubber strip being substantially in contact with the inner wall of the cleaning tank (6).

6. A self-rescue device for preventing drowning in coal mines according to claim 5, characterized in that: The material turning and net pulling and pushing mechanism comprises a servo motor (23) fixedly mounted on the outer surface of the cleaning tank (6); an output end of the servo motor (23) is fixedly connected to a screw rod (24); and an end of the screw rod (24) away from the servo motor (23) is fixedly connected to a driving gear (25).

7. A self-rescue device for preventing drowning in coal mines according to claim 6, characterized in that: The inner surface of the cleaning tank (6) is rotatably connected to a transverse shaft (26); one end of the transverse shaft (26) close to the driving gear (25) is fixedly connected to a transmission gear (27); the outer surface of the transmission gear (27) is meshingly connected to the outer surface of the driving gear (25); and the outer surface of the transverse shaft (26) is provided with a plurality of groups of evenly arranged material-moving claws (28).

8. A self-rescue device for preventing drowning in coal mines according to claim 7, characterized in that: A lower gear (29) is fixedly sleeved on the outer surface of the transverse shaft (26), a rack frame (30) is slidably connected to the inner side of the cleaning tank (6), and the outer surface of the rack frame (30) is meshingly connected to the outer surface of the lower gear (29), and the top of the rack frame (30) is fixedly connected to the bottom of the guide airbag (19).

9. A self-rescue device for preventing drowning in coal mines according to claim 8, characterized in that: The inner wall of the cleaning tank (6) is rotatably connected to a longitudinal axis (31), the outer surface of the longitudinal axis (31) is provided with three groups of evenly distributed net-pulling strips (32), and the outer surface of the longitudinal axis (31) is fixedly sleeved with an upper gear (33); a strip-shaped hole (34) is provided on the inner side of the cleaning tank (6) close to the screw rod (24), an L-shaped rod (35) is threadedly sleeved on the outer surface of the screw rod (24), and the outer surface of the L-shaped rod (35) is slidably connected to the inner side of the strip-shaped hole (34), and the end of the L-shaped rod (35) away from the screw rod (24) is fixedly connected to a rack plate (36), and the outer surface of the rack plate (36) is meshingly connected to the outer surface of the upper gear (33).

10. A self-rescue device for preventing drowning in coal mines according to claim 1, characterized in that: The guide limit mechanism comprises a fixed block (1601) arranged on the inner wall of the guide tube rack (16); a limit spring (1602) is arranged on the outer surface of the fixed block (1601); a piston (1603) is arranged at one end of the limit spring (1602) away from the fixed block (1601); and the piston (1603) is slidably connected to the inner wall of the guide tube rack (16).

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