CN112107807A - Oxygen-enriched dust mask for plateau tunnel - Google Patents
Oxygen-enriched dust mask for plateau tunnel Download PDFInfo
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- CN112107807A CN112107807A CN202010880171.3A CN202010880171A CN112107807A CN 112107807 A CN112107807 A CN 112107807A CN 202010880171 A CN202010880171 A CN 202010880171A CN 112107807 A CN112107807 A CN 112107807A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/02—Masks
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
- A62B18/10—Valves
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/02—Respiratory apparatus with compressed oxygen or air
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/02—Valves
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Abstract
The invention discloses an oxygen-enriched dust mask for a plateau long tunnel, and relates to the technical field of dust masks; comprises a mask part, an oxygen diffusion part, a trachea and a winding mechanism; the winding mechanism comprises a shell, a plurality of sliding chutes, sliding pieces, an inlet pipe orifice and an outlet pipe orifice; the air pipe penetrates through the shell, the part of the air pipe, which is positioned in the shell, is wound into an annular winding part, and the sliding part comprises a sliding cap, a connecting piece, a limiting block and a tension spring; the mask part comprises a mask body, a mixing mechanism which is positioned on the mask body and used for mixing air and oxygen, and a one-way air outlet valve which is positioned on the mask body and faces the outer side of the mask body in the direction; the oxygen diffusion part is connected with the mixing mechanism. The invention provides an oxygen-enriched dust mask for a plateau long tunnel, which can provide more oxygen for a wearer, so that the safety of the wearer in an oxygen-deficient environment is improved.
Description
Technical Field
The invention belongs to the technical field of dust masks, and particularly relates to an oxygen-enriched dust mask for a highland and long tunnel.
Background
In the special environment of long and large tunnel engineering construction, a large amount of particulate matters such as blast fume, dust, motor vehicle tail gas, flying dust and the like are generated due to manual and mechanical operation, and the oxygen consumption of equipment application is large, the ventilation effect of a construction site is poor, and the oxygen content in the air is low. Workers inhale a large amount of dust during construction, lung tissue fibrosis is caused, so that formed silicon nodules are irreversible and gradually develop, and finally death is caused due to respiratory function loss of lungs, namely pneumoconiosis. The data show that about thirty thousand new occupational diseases occur annually in recent years, and the pneumoconiosis is the most common occupational disease in China and accounts for about 90 percent of the total number of occupational patients. In such harsh environments, the problem of low oxygen content further increases the difficulty of construction. When the construction is carried out in an oxygen-deficient environment, the operation personnel still need to bear heavy labor, the production efficiency is extremely low, the construction quality and the construction progress can not be guaranteed, and the health of the operation personnel is threatened and even the life safety is threatened.
The existing dust mask can not provide more oxygen for a wearer.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an oxygen-enriched type dust mask for a plateau long tunnel, which can provide more oxygen for a wearer so as to improve the safety of the wearer in an oxygen-deficient environment.
In order to achieve the purpose, the invention adopts the following technical scheme:
an oxygen-enriched dust mask for a plateau tunnel comprises a mask part, an oxygen diffusion part for conveying oxygen, an air pipe for connecting the mask part and the oxygen diffusion part, and a winding mechanism for winding the air pipe; the winding mechanism comprises a shell, a plurality of sliding chutes positioned in the shell, sliding pieces connected in the sliding chutes in a sliding manner, an air inlet pipe orifice positioned at one side of the shell and used for penetrating an air pipe, and an air outlet pipe orifice positioned at one side of the shell and used for penetrating the air pipe; the air pipe penetrates through the shell, the part of the air pipe, which is positioned in the shell, is wound into an annular winding part, and the sliding part abuts against the inner side of the winding part; the sliding part comprises a sliding cap positioned in the shell, a connecting piece inserted into the sliding cap after penetrating through the sliding groove, a limiting block positioned at one end of the connecting piece far away from the sliding cap, and a tension spring positioned in the sliding cap and used for extruding the limiting block on the shell; the mask part comprises a mask body, a mixing mechanism which is positioned on the mask body and used for mixing air and oxygen, and a one-way air outlet valve which is positioned on the mask body and faces the outer side of the mask body in the direction; the oxygen diffusion part is connected with the mixing mechanism.
The mixing mechanism comprises a main body, a driving cavity positioned in the main body, a mixing cavity positioned in the main body, a plurality of driving blades positioned in the driving cavity, a plurality of mixing blades positioned in the mixing cavity and a rotating shaft penetrating through the main body; the rotating shaft penetrates through the driving cavity and the mixing cavity, one end of the driving blade is fixed on the rotating shaft, and one end of the mixing blade is fixed on the rotating shaft; the mixing mechanism comprises an air inlet, an air outlet, a second air inlet, a second air outlet, a one-way valve, a second one-way valve and a locking mechanism, wherein the air inlet is positioned on one side of the driving cavity and used for inputting air in the atmosphere into the driving cavity so as to drive the mixing blades to rotate, the air outlet is positioned on the other side of the driving cavity and used for outputting air corresponding to the second air inlet, the one-way valve is positioned in the air inlet and faces towards the inside of the driving cavity, the one-way valve is positioned in the air outlet and faces towards the outside of the driving cavity, the one-way valve is positioned in the second air inlet and faces towards the inside of the driving cavity, the second one-way valve is positioned in the second air outlet and faces towards the outside of the driving cavity, and the locking mechanism; the direction in which the air inlet drives the driving blade to rotate is the same as the direction in which the second air inlet drives the driving blade to rotate; the air outlet is communicated with the mixing cavity, one end of the air pipe is connected with the mixing cavity, and the air pipe is provided with a valve mechanism which is in an open state when the rotating shaft rotates; and a main outlet for outputting gas mixed by air and oxygen is arranged on one side of the mixing cavity.
Preferably, the valve mechanism comprises a through hole which is positioned on one side of the mixing cavity, away from the driving cavity, and is used for the rotating shaft to pass through, a cover plate which covers the through hole, an oxygen input port positioned on the cover plate, a valve core which is rotatably connected in the cover plate, an oxygen channel which is positioned on the valve core and is used for communicating the oxygen input port with the through hole, a return spring which is used for connecting the valve core and the cover plate, and damping oil positioned between the valve core and the rotating shaft; the valve core is attached to the oxygen input port, the oxygen diffusion part is connected to the oxygen input port, and the oxygen channel and the oxygen input port are staggered; the cover body is internally provided with a limiting mechanism which ensures that the oxygen channel is communicated with the oxygen input port after the rotating shaft drives the valve core to rotate.
Preferably, the second one-way valve comprises a valve plate, a second return spring and a second limiting block, wherein one end of the valve plate is hinged to the inner wall of the second air outlet, the second return spring is located at the hinged end of the valve plate, and the second limiting block is located at one end, far away from the second return spring, of the valve plate; the second limiting block is abutted against one side, close to the driving cavity, of the valve plate and fixed on the inner wall of the second air outlet; the locking mechanism comprises a winding wheel sleeved on the rotating shaft, damping oil positioned between the rotating shaft and the winding wheel, a slot positioned on the inner wall of the second air outlet, a limiting column with one end fixed at the bottom of the slot, a bolt with one end inserted into the slot, a bolt spring sleeved on the limiting column and a wire groove positioned on the limiting column; one end of the bolt, which is positioned outside the slot, abuts against one side of the valve plate, which is far away from the second limiting block, and the bolt abuts against one end of the valve plate, which is far away from the second return spring; one end of the bolt spring is connected to the bottom of the slot, and the other end of the bolt spring is connected to the bolt; the locking mechanism also comprises a pull wire with one end connected with one end of the bolt far away from the valve plate and a guide surface positioned at one end of the bolt close to the valve plate; one end of the pull wire, which is far away from the bolt, penetrates through the wire groove and then is connected to the winding wheel, and the guide surface gradually approaches to the pull wire direction from one end close to the valve plate to the other end; the distance from the limiting column to the bolt is greater than the length of the bolt extending out of the slot part.
Preferably, the limiting mechanism comprises a groove positioned at the outer edge of the valve core and a third limiting block positioned in the groove; the third limiting block is fixed on the cover plate and is abutted against one end of the groove; when the third limiting block is abutted against the other end of the groove, the oxygen channel is aligned with the oxygen input port.
Preferably, the number of the driving blades is at least six, and the driving blades are arranged in an annular array centering on the rotating shaft.
Preferably, the number of mixing blades is at least six, the mixing blades being arranged in an annular array centered on the axis of rotation.
The invention has the beneficial effects that: the invention provides an oxygen-enriched dust mask for a plateau long tunnel, which can provide more oxygen for a wearer, so that the safety of the wearer in an oxygen-deficient environment is improved.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic view of the winding mechanism with the upper cover hidden;
FIG. 3 is a cross-sectional view of the winding mechanism;
FIG. 4 is a cross-sectional view of the present invention;
FIG. 5 is a cross-sectional view B-B of FIG. 4;
FIG. 6 is an enlarged view at C of FIG. 4;
FIG. 7 is a cross-sectional view taken along line D-D of FIG. 4;
FIG. 8 is a schematic view of the present invention during inspiration;
FIG. 9 is a schematic view of a one-way outlet valve during gentle inspiration;
FIG. 10 is a schematic view of the present invention during a gentle exhalation;
FIG. 11 is a schematic view of the one-way exhalation valve during tachypnea;
FIG. 12 is a schematic view of the present invention during a rush exhalation;
FIG. 13 is a schematic view of the airflow through the drive chamber during a rapid exhalation;
fig. 14 is a schematic view showing the valve plate being locked again by the latch pin at the time of suction.
In the figure: the air pipe comprises an air pipe 1, a shell 2, a chute 3, a sliding piece 4, an inlet pipe orifice 5, an outlet pipe orifice 6, a sliding cap 7, a connecting piece 8, a limiting block 9, a tension spring 10, a winding part 11, a cover body 12, a main body 13, a driving cavity 14, a mixing cavity 15, a rotating shaft 16, a driving blade 17, a mixing blade 18, an air inlet 19, an air outlet 20, a second air inlet 21, a second air outlet 22, a one-way valve 23, a second one-way valve 24, a through hole 25 and a cover plate 26, the valve core 27, the oxygen input port 28, the oxygen channel 29, the return spring 30, the winding wheel 31, the total outlet 32, the valve plate 33, the second limit block 35, the slot 36, the limit post 37, the bolt 38, the bolt spring 39, the wire groove 40, the pull wire 41, the guide surface 42, the groove 43, the third limit block 44, the bottom shell 45, the upper cover 46, the valve body 47, the one-way valve plate 49, the first valve hole 50, the second valve hole 51, the oxygen diffusion part 52 and the winding mechanism 53.
Detailed Description
The invention is explained in further detail below with reference to the figures and the detailed description:
example (b):
referring to fig. 1 to 14, an oxygen-rich type dust mask for a plateau tunnel comprises a mask portion, an oxygen diffusion portion 52 for delivering oxygen, an air tube 1 for connecting the mask portion and the oxygen diffusion portion, and a winding mechanism 53 for winding the air tube 1; the winding mechanism comprises a shell 2, a plurality of sliding chutes 3 positioned in the shell, sliding pieces 4 connected in the sliding chutes 3 in a sliding manner, a pipe inlet 5 positioned at one side of the shell and used for penetrating an air pipe 1, and a pipe outlet 6 positioned at one side of the shell and used for penetrating the air pipe 1; the air pipe 1 penetrates through the shell, the part of the air pipe 1 in the shell is wound into a winding part 11 in an annular shape, and the sliding part 4 abuts against the inner side of the winding part 11; the sliding part 4 comprises a sliding cap 7 positioned in the shell, a connecting piece 8 inserted into the sliding cap 7 after penetrating through the sliding chute 3, a limiting block 9 positioned at one end of the connecting piece 8 far away from the sliding cap 7, and a tension spring 10 positioned in the sliding cap 7 and used for extruding the limiting block 9 on the shell; the mask part comprises a mask body 12, a mixing mechanism which is positioned on the mask body 12 and is used for mixing air and oxygen, and a one-way air outlet valve which is positioned on the mask body 12 and faces the outer side of the mask body 12; the oxygen diffusion part is connected with the mixing mechanism.
The one-way air outlet valve comprises a valve body 47 and a one-way valve plate 49 positioned in the valve body 47; one end of the one-way valve plate 49 is hinged to one side of the inner wall of the valve body 47, which is close to the inside of the cover body 12, one side of the valve body 47, which is close to the inside of the cover body 12, is provided with a first valve hole 50, and one side of the valve body 47, which is close to the outside of the cover body 12, is provided with a second valve hole 51; the hinged end of the check valve plate 49 is provided with a valve plate spring for attaching the check valve plate 49 to the first valve hole 50.
The mixing mechanism comprises a main body 13, a driving cavity 14 positioned in the main body 13, a mixing cavity 15 positioned in the main body 13, a plurality of driving blades 17 positioned in the driving cavity 14, a plurality of mixing blades 18 positioned in the mixing cavity 15 and a rotating shaft 16 penetrating through the main body 13;
the rotating shaft 16 penetrates through the driving cavity 14 and the mixing cavity 15, one end of the driving blade 17 is fixed on the rotating shaft 16, and one end of the mixing blade 18 is fixed on the rotating shaft 16;
the number of the driving blades 17 is at least six, and the driving blades 17 are arranged in an annular array with the rotating shaft 16 as the center.
The number of mixing blades 18 is at least six, the mixing blades 18 being arranged in an annular array centered on the axis of rotation 16.
The mixing mechanism comprises an air inlet 19 which is positioned at one side of the driving cavity 14 and used for inputting air in the atmosphere into the driving cavity 14 so as to drive the mixing blade 18 to rotate, an air outlet 20 which is positioned at the other side of the driving cavity 14 and used for outputting air corresponding to the air inlet 19, a second air inlet 21 which is positioned at one side of the driving cavity 14 and used for inputting air exhaled by a human body into the driving cavity 14 so as to drive the mixing blade 18 to rotate, a second air outlet 22 which is positioned at the other side of the driving cavity 14 and used for outputting air corresponding to the second air inlet 21, and a one-way valve 23 which is positioned in the air inlet 19 and faces into the driving cavity 14, the one-way valve 23 is positioned in the air outlet 20 and faces the outside of the driving cavity 14, the one-way valve 23 is positioned in the second air inlet 21 and faces the inside of the driving cavity 14, the second one-way valve 24 is positioned in the second air outlet 22 and faces the outside of the driving cavity 14, and the locking mechanism is used for locking the second one-way valve 24;
the direction in which the air inlet 19 drives the driving blade 17 to rotate is the same as the direction in which the second air inlet 21 drives the driving blade 17 to rotate; the air outlet 20 is communicated with the mixing cavity 15, one end of the air pipe 1 is connected with the mixing cavity 15, and the air pipe 1 is provided with a valve mechanism which is opened when the rotating shaft 16 rotates;
the mixing chamber 15 is provided at one side with a main outlet 32 for outputting a gas in which air and oxygen are mixed.
The valve mechanism comprises a through hole 25 which is positioned on one side of the mixing cavity 15 away from the driving cavity 14 and used for the rotating shaft 16 to pass through, a cover plate 26 which covers the through hole 25, an oxygen input port 28 positioned on the cover plate 26, a valve core 27 rotatably connected in the cover plate 26, an oxygen channel 29 which is positioned on the valve core 27 and used for communicating the oxygen input port 28 with the through hole 25, a return spring 30 used for connecting the valve core 27 and the cover plate 26, and damping oil positioned between the valve core 27 and the rotating shaft 16;
the valve core 27 is attached to the oxygen input port 28, the oxygen diffusion part is connected to the oxygen input port 28, and the oxygen channel 29 and the oxygen input port 28 are staggered;
a limiting mechanism which ensures that the oxygen channel 29 is communicated with the oxygen input port 28 after the rotating shaft 16 drives the valve core 27 to rotate is arranged in the cover body 12.
The second one-way valve 24 comprises a valve plate 33, one end of which is hinged on the inner wall of the second air outlet 22, a second return spring positioned at the hinged end of the valve plate 33, and a second limiting block 35 positioned at one end of the valve plate 33 far away from the second return spring;
the second limiting block 35 is abutted against one side of the valve plate 33 close to the driving cavity 14, and the second limiting block 35 is fixed on the inner wall of the second air outlet 22;
the locking mechanism comprises a winding wheel 31 sleeved on the rotating shaft 16, damping oil positioned between the rotating shaft 16 and the winding wheel 31, a slot 36 positioned on the inner wall of the second air outlet 22, a limiting column 37 with one end fixed at the bottom of the slot 36, a plug pin 38 with one end inserted into the slot 36, a plug pin spring 39 sleeved on the limiting column 37, and a wire slot 40 positioned on the limiting column 37;
one end of the bolt 38, which is positioned outside the slot 36, abuts against one side of the valve plate 33, which is far away from the second limiting block 35, and the bolt 38 abuts against one end of the valve plate 33, which is far away from the second return spring; one end of the bolt spring 39 is connected to the bottom of the slot 36, and the other end of the bolt spring 39 is connected to the bolt 38;
the locking mechanism further comprises a pull wire 41 with one end connected to the end of the bolt 38 far away from the valve plate 33, and a guide surface 42 positioned at one end of the bolt 38 close to the valve plate 33;
one end of the pull wire 41, which is far away from the bolt 38, passes through the wire groove 40 and then is connected to the winding wheel 31, and the guide surface 42 gradually approaches to the pull wire 41 from one end close to the valve plate 33 to the other end;
the distance from the limiting column 37 to the bolt 38 is larger than the length of the part of the bolt 38 extending out of the slot 36.
The limiting mechanism comprises a groove 43 positioned on the outer edge of the valve core 27 and a third limiting block 44 positioned in the groove 43;
the third limiting block 44 is fixed on the cover plate 26, and the third limiting block 44 abuts against one end of the groove 43;
when the third stopper 44 abuts against the other end of the groove 43, the oxygen passage 29 and the oxygen input port 28 are aligned.
Principle of embodiment:
when the mask is used, the oxygen diffusion part is hung on the body, then the mask part is worn on the face, and the oxygen diffusion part is mature in the prior art and is not unfolded; for some short people, the trachea 1 may be long, and at this time, the trachea 1 may interfere with the work, so a winding mechanism is proposed.
The working principle of the winding mechanism is as follows:
the housing 2 includes a bottom shell 45 and an upper cover 46 covering the bottom shell 45, and the inlet 5 and the outlet 6 are located on the bottom shell 45.
The upper cover 46 is removed from the bottom case 45, and then the extra length of the air tube 1 is wound around the slider 4, thereby changing the radius of the winding part 11 by adjusting the position of the slider 4 on the chute 3.
Under the action of the tension spring 10, a relatively large friction force exists between the stopper 9 and the housing, so that the slider 4 is stabilized on the chute 3.
In addition, in use, the engineering personnel find that when the construction is carried out at a place close to the tunnel opening, although the oxygen content is not much outside the tunnel, the influence on the breathing of the engineering personnel is small, and at the moment, the breathing of the engineering personnel is gentle; in the deep part of the tunnel, the oxygen content is much lower than that in the outside, so that the engineering personnel can breathe rapidly under the condition of oxygen deficiency.
Before further explanation of the use of the present embodiment, it is prioritized to:
when breathing is gentle (oxygen content is not very low): when air is sucked, air in the atmosphere enters the driving cavity 14 from the air inlet 19, the driving blade 17 rotates to drive the rotating shaft 16 to rotate, and when the rotating shaft 16 rotates, the rotating shaft 16 drives the winding wheel 31 to rotate under the action of the damping oil, a rotating speed difference exists between the rotating shaft 16 and the winding wheel 31, the damping force between the rotating shaft 16 and the winding wheel 31 is in direct proportion to the rotating speed difference, therefore, when the winding wheel 31 is rotated, the pulling wire 41 is pulled, the latch spring 39 is shortened and the elastic force is increased, and the latch 38 moves toward the inside of the slot 36, which needs to be mentioned, in one suction, the difference in rotational speed between the rotary shaft 16 and the winding wheel 31 is increased and then decreased, therefore, the tension of the wire 41 by the winding wheel 31 is increased and then decreased, that is, the latch 38 moves a distance into the slot 36 and then returns under the action of the latch spring 39. It should be noted here that the suction is relatively gentle, which results in a relatively slow rotation speed of the driving vane 17, and at this time, the latch 38 cannot be disengaged from the valve plate 33 all the time when moving, and at this time, the second check valve 24 is in a locked state, and the valve plate 33 cannot rotate. When the air is sucked, the air in the driving cavity 14 enters the mixing cavity 15 through the air outlet 20, meanwhile, the rotating shaft 16 also drives the valve core 27 to rotate after rotating, the third limiting block 44 abuts against the other end of the groove 43, the return spring 30 is twisted, the oxygen input port 28 is aligned with the oxygen channel 29, the oxygen in the oxygen dispersion part enters the mixing cavity 15 through the oxygen input port 28 and the oxygen channel 29, because the mixing blade 18 rotates at the moment, the oxygen and the air can be well mixed under the stirring of the mixing blade 18, and the mixed gas enters the cover body 12 from the main outlet 32 and is absorbed by a human body, see fig. 8. After the air suction is finished, the rotating shaft 16 stops rotating, the valve core 27 is reset under the action of the reset spring 30, and the oxygen in the oxygen diffusion part is blocked by the valve core 27 (because the oxygen content in the environment is not very low at this time, the valve core 27 timely cuts off the oxygen after each air suction, thereby greatly saving the oxygen). When exhaling, the exhaled gas exits the one-way outlet valve.
When breathing is rapid (at this time, it may be in the deep tunnel, and the oxygen content in the environment is low), at this time, the rotation speed of the driving blade 17 is faster than that when breathing is slow, which results in that, when breathing in, the damping force of the rotating shaft 16 to the winding wheel 31 is larger, the latch 38 will abut against the limit column 37, see fig. 11, at this time, the latch 38 and the valve plate 33 are disengaged, and when breathing out, the path of the air and oxygen is the same as that when breathing in. At this time, because the breath is relatively rapid, the breath is immediately switched from inspiration to expiration, and at this time, a part of the exhaled air will go out from the one-way air outlet valve, and another part of the exhaled air will go out through the second air inlet 21 and the second air outlet 22, as shown in fig. 12. It should be noted that the air also drives the rotating shaft 16 to rotate during the process from the second air inlet 21 to the second air outlet 22, so as to ensure that the rotating shaft 16 is always in a rotating state during the process of breathing, and the latch 38 and the valve plate 33 are always disengaged, see fig. 13. In addition, it should be noted that, in order to prevent the latch 38 from locking the valve plate 33 again in the neutral position of switching between inhalation and exhalation, the length of the projection of the latch 38 from the slot 36 is smaller than the distance between the limit post 37 and the latch 38, which will make the latch 38 and the valve plate 33 have a distance when the latch 38 abuts against the limit post 37, and even if the latch 38 moves toward the valve plate 33 under the action of the latch spring 39, the latch 33 will not be locked again immediately.
Meanwhile, in the case of shortness of breath, since the rotating shaft 16 is always in a rotating state, the rotating shaft 16 always has a damping force on the valve element 27, and the oxygen input port 28 and the oxygen channel 29 are always aligned, and at this time, the oxygen diffusion portion keeps supplying oxygen to the mixing chamber 15. The oxygen is mixed in the mixing cavity and then goes out from the main outlet and is finally absorbed by the human body.
When the breath is rapid, the exhaled air is divided into two parts to be discharged, which is also beneficial to smooth breath.
When breathing turns to gently from the scram, at this moment, the bolt stretches out the slot under the effect of bolt spring, and the valve plate can support and lean on the spigot surface under the effect of second reset spring, and at this moment, when next gentle breathing in, the atmospheric pressure in the drive chamber can reduce, and the valve plate can push away the bolt and support again and lean on the second stopper under the effect of atmospheric pressure and spigot surface, then the bolt is dead the valve plate again under the effect of bolt spring.
Claims (7)
1. An oxygen-enriched dust mask for a plateau tunnel is characterized by comprising a mask part, an oxygen diffusion part for conveying oxygen, an air pipe for connecting the mask part and the oxygen diffusion part, and a winding mechanism for winding the air pipe;
the winding mechanism comprises a shell, a plurality of sliding chutes positioned in the shell, sliding pieces connected in the sliding chutes in a sliding manner, an air inlet pipe orifice positioned at one side of the shell and used for penetrating an air pipe, and an air outlet pipe orifice positioned at one side of the shell and used for penetrating the air pipe;
the air pipe penetrates through the shell, the part of the air pipe, which is positioned in the shell, is wound into an annular winding part, and the sliding part abuts against the inner side of the winding part;
the sliding part comprises a sliding cap positioned in the shell, a connecting piece inserted into the sliding cap after penetrating through the sliding groove, a limiting block positioned at one end of the connecting piece far away from the sliding cap, and a tension spring positioned in the sliding cap and used for extruding the limiting block on the shell;
the mask part comprises a mask body, a mixing mechanism which is positioned on the mask body and used for mixing air and oxygen, and a one-way air outlet valve which is positioned on the mask body and faces the outer side of the mask body in the direction;
the oxygen diffusion part is connected with the mixing mechanism.
2. The oxygen-enriched dust mask for the plateau long tunnel as claimed in claim 1, wherein the mixing mechanism comprises a main body, a driving cavity located in the main body, a mixing cavity located in the main body, a plurality of driving blades located in the driving cavity, a plurality of mixing blades located in the mixing cavity, and a rotating shaft penetrating through the main body;
the rotating shaft penetrates through the driving cavity and the mixing cavity, one end of the driving blade is fixed on the rotating shaft, and one end of the mixing blade is fixed on the rotating shaft;
the mixing mechanism comprises an air inlet, an air outlet, a second air inlet, a second air outlet, a one-way valve, a second one-way valve and a locking mechanism, wherein the air inlet is positioned on one side of the driving cavity and used for inputting air in the atmosphere into the driving cavity so as to drive the mixing blades to rotate, the air outlet is positioned on the other side of the driving cavity and used for outputting air corresponding to the second air inlet, the one-way valve is positioned in the air inlet and faces towards the inside of the driving cavity, the one-way valve is positioned in the air outlet and faces towards the outside of the driving cavity, the one-way valve is positioned in the second air inlet and faces towards the inside of the driving cavity, the second one-way valve is positioned in the second air outlet and faces towards the outside of the driving cavity, and the locking mechanism;
the direction in which the air inlet drives the driving blade to rotate is the same as the direction in which the second air inlet drives the driving blade to rotate; the air outlet is communicated with the mixing cavity, one end of the air pipe is connected with the mixing cavity, and the air pipe is provided with a valve mechanism which is in an open state when the rotating shaft rotates;
and a main outlet for outputting gas mixed by air and oxygen is arranged on one side of the mixing cavity.
3. The oxygen-enriched plateau long tunnel dust mask as claimed in claim 2, wherein the valve mechanism comprises a through hole located on one side of the mixing chamber away from the driving chamber for the passage of the rotating shaft, a cover plate covering the through hole, an oxygen inlet located on the cover plate, a valve core rotatably connected in the cover plate, an oxygen channel located on the valve core for communicating the oxygen inlet and the through hole, a return spring for connecting the valve core and the cover plate, and damping oil located between the valve core and the rotating shaft;
the valve core is attached to the oxygen input port, the oxygen diffusion part is connected to the oxygen input port, and the oxygen channel and the oxygen input port are staggered;
the cover body is internally provided with a limiting mechanism which ensures that the oxygen channel is communicated with the oxygen input port after the rotating shaft drives the valve core to rotate.
4. The oxygen-rich type dust mask for the plateau long tunnel as claimed in claim 3,
the second one-way valve comprises a valve plate, a second return spring and a second limiting block, wherein one end of the valve plate is hinged to the inner wall of the second air outlet;
the second limiting block is abutted against one side, close to the driving cavity, of the valve plate and fixed on the inner wall of the second air outlet;
the locking mechanism comprises a winding wheel sleeved on the rotating shaft, damping oil positioned between the rotating shaft and the winding wheel, a slot positioned on the inner wall of the second air outlet, a limiting column with one end fixed at the bottom of the slot, a bolt with one end inserted into the slot, a bolt spring sleeved on the limiting column and a wire groove positioned on the limiting column;
one end of the bolt, which is positioned outside the slot, abuts against one side of the valve plate, which is far away from the second limiting block, and the bolt abuts against one end of the valve plate, which is far away from the second return spring; one end of the bolt spring is connected to the bottom of the slot, and the other end of the bolt spring is connected to the bolt;
the locking mechanism also comprises a pull wire with one end connected with one end of the bolt far away from the valve plate and a guide surface positioned at one end of the bolt close to the valve plate;
one end of the pull wire, which is far away from the bolt, penetrates through the wire groove and then is connected to the winding wheel, and the guide surface gradually approaches to the pull wire direction from one end close to the valve plate to the other end;
the distance from the limiting column to the bolt is greater than the length of the bolt extending out of the slot part.
5. The oxygen-enriched plateau long tunnel dust mask as claimed in claim 3 or 4, wherein the limiting mechanism comprises a groove located at the outer edge of the valve core, and a third limiting block located in the groove;
the third limiting block is fixed on the cover plate and is abutted against one end of the groove;
when the third limiting block is abutted against the other end of the groove, the oxygen channel is aligned with the oxygen input port.
6. The oxygen-enriched plateau long tunnel dust mask as claimed in claim 2, wherein the number of the driving blades is at least six, and the driving blades are arranged in an annular array around the rotating shaft.
7. The oxygen-enriched dust mask for the plateau long tunnel as claimed in claim 2, wherein the number of the mixing blades is at least six, and the mixing blades are arranged in an annular array around the rotating shaft.
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| CN202010880171.3A CN112107807B (en) | 2020-08-27 | 2020-08-27 | Oxygen-enriched dust mask for plateau tunnel |
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| CN202010880171.3A CN112107807B (en) | 2020-08-27 | 2020-08-27 | Oxygen-enriched dust mask for plateau tunnel |
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| CN112107807B CN112107807B (en) | 2021-09-03 |
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|---|---|
| CN112107807B (en) | 2021-09-03 |
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Inventor after: Lou Baigen Inventor after: Sun Li Inventor after: Si Hang Jun Inventor after: Lou Jieli Inventor after: Qian Jing Inventor before: Lou Baigen Inventor before: Sun Li Inventor before: Si Jun Inventor before: Lou Jieli Inventor before: Qian Jing |