CN113398504B

CN113398504B - Protective mask for disaster relief

Info

Publication number: CN113398504B
Application number: CN202110684127.XA
Authority: CN
Inventors: 李燕; 韦秋银; 龙秋香
Original assignee: Liuzhou Workers Hospital
Current assignee: Liuzhou Workers Hospital
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-12-20
Anticipated expiration: 2041-06-21
Also published as: CN113398504A

Abstract

The invention discloses a protective mask for disaster relief, which comprises a mask body, a breather valve, a dust-proof net and a cleaning assembly, wherein the mask body is provided with an air suction hole and a one-way exhaust hole; the filter element assembly is detachably mounted in the mounting cavity, the lower side wall of the outward end of the mounting cavity is communicated with an ash discharge channel, and the ash discharge channel is communicated with the air outlet end of the one-way exhaust hole; the dust separation net mounting cavity is positioned in a corresponding area of the air inlet front end of the filter element assembly; the cleaning assembly comprises a cleaning filter disc and an adjusting rod piece, one end of the adjusting rod piece can extend out of the mounting cavity, the other end of the adjusting rod piece sequentially penetrates through the dust separation net and the filter element assembly in a movable mode, the cleaning filter disc is movably sleeved on the adjusting rod piece, and a plurality of cleaning structures capable of deforming are arranged on two sides of the cleaning filter disc. This protective face mask for relief of disaster can effectively avoid outside dust tail shutoff filtration.

Description

Protective face mask for disaster relief

Technical Field

The invention relates to the technical field of disaster relief protective tools, in particular to a protective mask for disaster relief.

Background

At present, a fire-fighting tool and an escape tool are generally arranged in a building main body, so that the survival opportunity of internal personnel can be increased when the building main body is in a fire disaster, collapses of buildings or explodes of dust. When a building main body is in fire, collapsed or dust exploded, a large amount of dust and toxic smoke can be generated on site; it has been found that the death of people dying at the scene of a fire or explosion is mainly due to asphyxia caused by abnormal breathing, and therefore the protective mask is most used in the escape apparatus. The use of protective masks can ensure that trapped or disaster relief personnel can breathe normally and protect the face, or even the head, of a patient when a disaster occurs.

At present, the existing protective mask generally mainly comprises a mask body, goggles and a breather valve, wherein a filtering structure is arranged in the breather valve, and the filtering structure is used for filtering out tiny dust particles and toxic substances in air, so that the normal breathing of trapped people or disaster relief people is ensured. However, in the long-term use process of the protective mask, the filtered particulate matters in the air gradually adhere to and are deposited on the filtering structure, so that the filtering effect is reduced, and the breathing of users is difficult. In view of the above, the protective mask used by the disaster relief personnel is a special protective device with its own oxygen supply, since the disaster relief personnel need to perform a rescue operation in addition to the complex environment of the disaster site, which requires a great deal of physical power and oxygen. However, a large amount of smoke dust is generated at the disaster site, and a filtering structure on a protective mask used by ordinary trapped people is easily blocked by dust particles in the using process, so that the trapped people are difficult to breathe, and escape is influenced. In addition, the service environment of current protective mask generally takes place in conflagration or explosion scene, has leaded to the user of service to sweat more, because protective mask and patient's head or facial constitution an airtight environment, and then has leaded to a large amount of water smoke to condense on the goggles, influences user of service's vision, very influences the efficiency of fleing.

Disclosure of Invention

The present invention is directed to at least solve one of the above mentioned problems, and provides a protective mask for disaster relief, which can effectively prevent the filter structure from being blocked by external dust particles, and improve the using effect.

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

the utility model provides a protective face mask for relief of disaster, includes the face guard body, at least one suction opening and at least one-way exhaust hole have on the face guard body, be provided with the goggles on the face guard body, still include:

the breather valve is arranged on the air suction hole, an installation cavity is arranged in the breather valve, and the outside is communicated with the air suction hole through the installation cavity; the filter element assembly is detachably mounted in the mounting cavity, the lower side wall of the outward end of the mounting cavity is communicated with an ash discharge channel, and the ash discharge channel is communicated with the air outlet end of the one-way exhaust hole in an opening and closing manner;

the dust separation net is detachably plugged in a corresponding area of the mounting cavity, which is positioned at the air inlet front end of the filter element assembly; and

the cleaning assembly comprises a cleaning filter disc and an adjusting rod piece, one end of the adjusting rod piece can extend out of the mounting cavity, the other end of the adjusting rod piece sequentially and movably penetrates through the dust separation net and the filter element assembly, the cleaning filter disc is movably sleeved on an area, located between the filter element assembly and the dust separation net, of the adjusting rod piece, a plurality of deformable cleaning structures are arranged on two sides of the cleaning filter disc, and the cleaning structures can be abutted to the dust separation net and the filter element assembly;

the air outlet end of the air suction hole is communicated with an air inlet end of an air flow conveying pipeline, the air outlet end of the air flow conveying pipeline is arranged on a corresponding area, located on any side edge of the goggles, of the inner side wall of the mask body, the air inlet end of the one-way exhaust hole is connected with a collecting cover, the air inlet end of the collecting cover is arranged on a corresponding area, located on the opposite side of the air outlet end of the air flow conveying pipeline, of the inner side wall of the mask body, the air inlet end of the one-way exhaust hole is communicated with an air injection channel, the air outlet end of the air injection channel is communicated with the outlet end of the ash discharge channel, a deformable plugging tongue piece is arranged between the air outlet end of the air injection channel and the outlet end of the ash discharge channel, and the plugging tongue piece can plug the air outlet end of the air injection channel;

wherein, the regulating rod piece can drive the cleaning filter disc to rotate so as to scrape and clean the dust separation net.

As the improvement of the technical scheme, the inlet end of the ash discharge channel is arranged at the air inlet front position of the filter element assembly in the mounting cavity, and the air outlet end of the one-way exhaust hole is arranged below the mounting cavity.

As an improvement of the technical scheme, the peripheral side of the adjusting rod piece is provided with a spiral guide groove, the cleaning filter disc is movably sleeved on the corresponding outer wall of the adjusting rod piece in the installation cavity, and the inner ring of the cleaning filter disc is provided with a chuck which can be clamped into the spiral guide groove.

As an improvement of the technical scheme, the breather valve comprises a shell and at least one-way air inlet valve arranged on the shell, the mounting cavity is arranged in the shell, and the bottom of the mounting cavity is communicated with the air suction hole; the mounting cavity is communicated with the outside through the one-way air inlet valve, one outward end of the adjusting rod piece movably penetrates through the shell, and a pressing part is formed outside the shell; the ash discharge channel is arranged in the side wall of the shell.

As an improvement of the technical scheme, the one-way air inlet valve comprises an air inlet cavity and an air inlet hole communicated with the air inlet cavity and the outside, and the air inlet cavity is communicated with the installation cavity; the diameter of one end of the air inlet hole close to the air inlet cavity is larger than that of the other end of the air inlet hole; a first blocking bead is movably arranged in the air inlet cavity.

As an improvement of the above technical scheme, the filter element assembly comprises a bottom filter disc and a movable filter disc, the movable filter disc is movably sleeved on the adjusting rod member, the inner ring of the movable filter disc is also provided with the chuck, and the chuck is clamped in the spiral guide groove; a plurality of filter sheets are arranged on the opposite sides of the bottom filter sheet and the movable filter sheet in a staggered manner, and can be bent and deformed; the adjustment rod can drive the movable filter element to move away from or close to the bottom filter element so as to change the effective filtering thickness of the filter element component.

As an improvement of the technical scheme, the adjusting rod pieces are movably sleeved with return springs in the areas between the dust separation net and the cleaning filter disc and between the cleaning filter disc and the filter element assembly.

As an improvement of the above technical scheme, an air outlet hopper is arranged at an air outlet end of the air flow conveying pipeline, a small end of the air outlet hopper is connected with the air outlet end of the air flow conveying pipeline, a large end of the air outlet hopper is flat and forms a linear air outlet nozzle, and the length direction of the air outlet nozzle is consistent with the length direction of the side edge of the corresponding side of the goggles.

As an improvement of the technical scheme, the novel face mask further comprises a soft protective hood, the edge of the soft protective hood is connected to the periphery of the face mask body, and the soft protective hood and the face mask body are buckled to form a protective cavity for accommodating the head of a user; the both sides of face guard body are provided with and connect fixed knot to construct, connect fixed knot to construct and can closely detain the face guard body and paste in order to form airtight sealed on user's face.

Compared with the prior art, the beneficial effects of this application are:

according to the protective mask for disaster relief, the dust isolating net is arranged in the breather valve, and the cleaning filter disc and the dust isolating net can be used for primarily isolating large-particle dust in air from entering the filter element assembly, so that the situation that the large-particle dust blocks and blocks the normal air circulation of the filter element assembly is avoided; the cleaning filter disc can be driven to rotate by utilizing the adjusting rod piece so as to scrape and clean the dust separation net and the dust deposit adhered to the air inlet end of the filter element assembly, the dust separation net is convenient to conduct, and the ventilation area is increased. Simultaneously, the design of the cleaning filter disc effectively increases the filtering area of the whole protective mask, the deformable cleaning structure can also clean large particles and tiny dust deposited on the cleaning filter disc when the dust separation net is scraped, and the cleaning effect is good. In addition, the lower side wall of the outer end of the mounting cavity is communicated with the dust discharging channel, dust falling on the lower side wall of the mounting cavity can be effectively collected through the dust discharging channel, meanwhile, negative pressure formed by airflow discharged from the one-way exhaust hole drives deposited micro dust in the dust discharging channel to be discharged outwards, micro dust is prevented from being blocked in the mounting cavity and the dust discharging channel, and automatic dust cleaning is achieved.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a first schematic view of a mask body according to an embodiment of the present invention;

FIG. 3 is a second schematic structural view of a mask body according to an embodiment of the present invention;

FIG. 4 is a partial exploded view of a mask body in accordance with an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a mask body in an embodiment of the present invention;

FIG. 6 is a schematic diagram of the construction of a filter element assembly in an embodiment of the invention;

fig. 7 is a cross-sectional view of a one-way intake valve in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

As shown in fig. 1 to 7, the present invention provides a protective mask for disaster relief, which comprises a mask body 10, wherein the mask body 10 has at least one air suction hole 20 and at least one-way exhaust hole 30, the mask body 10 is provided with goggles 40, the protective mask further comprises a breather valve 50, a dust-proof net 60 and a cleaning assembly 70, the breather valve 50 is installed on the air suction hole 20, a mounting cavity 51 is arranged in the breather valve 50, and the outside is communicated with the air suction hole 20 through the mounting cavity 51; the filter element assembly is detachably mounted in the mounting cavity 51, an ash discharge channel 52 is communicated with the lower side wall of the outward end of the mounting cavity 51, the ash discharge channel 52 is communicated with the air outlet end of the one-way exhaust hole 30 in an opening and closing manner, and the ash discharge channel 52 is communicated with the air outlet end of the one-way exhaust hole 30 through a one-way valve body; the dust separation net 60 can be detachably plugged in a corresponding area of the mounting cavity 51 positioned at the air inlet front end of the filter element assembly; the cleaning assembly 70 comprises a cleaning filter disc 71 and an adjusting rod 72, one end of the adjusting rod 72 can extend out of the mounting cavity 51, the other end of the adjusting rod 72 sequentially and movably penetrates through the dust separation net 60 and the filter element assembly, the cleaning filter disc 71 is movably sleeved on an area, located between the filter element assembly and the dust separation net 60, of the adjusting rod 72, a plurality of deformable cleaning structures 73 are arranged on two sides of the cleaning filter disc 71, and the cleaning structures 73 can be abutted to the dust separation net 60 and the filter element assembly; wherein, the adjusting rod 72 can drive the cleaning filter disc 71 to rotate so as to scrape and clean the dust-separation net 60. Wherein, the end of the installation cavity 51 communicated with the air suction hole 20 is the bottom in the application, and the lower side wall of the installation cavity 51 is the side of the installation cavity 51 pointing to the ground when the mask body 10 is worn on the face of a user, so that dust particles deposited in the installation cavity 51 can automatically converge into the dust discharge channel 52 due to the self gravity in normal use, and the one-way exhaust hole 30 only discharges air flow outwards, so that the discharged air flow can suck and take away the dust particles in the dust discharge channel 52, thereby realizing the function of automatic dust discharge in use. The function of the one-way valve body is to prevent outside air from entering the installation cavity 51 through the ash discharge channel 52 during air suction, and to avoid the ash discharge function of the ash discharge channel 52 from losing.

It should be noted that, because the protective mask is used for self-rescue in disaster sites, the environment in disaster sites is very complex, in order to make the protective mask capable of being effectively worn on the head of a user, the protective mask further comprises a soft protective hood 11, the edge of the soft protective hood 11 is connected to the peripheral edge of the mask body 10, and the soft protective hood 11 is buckled with the mask body 10 to form a protective cavity 12 for accommodating the head of a user; the two sides of the mask body 10 are provided with connecting and fixing structures 13, and the connecting and fixing structures 13 can tightly buckle the mask body 10 on the face of a user to form airtight sealing. Wherein the soft protective head cover 11 is made of fireproof and heat-insulating material, so as to effectively protect and protect the head of the patient, and the connecting and fixing structure 13 can be a conventional elastic band or a helmet-like fixing structure, which is not described in detail herein. The attachment structure 13 is preferably an elastic band in this application, which facilitates efficient storage when the protective mask is not in use. In addition, the lower part of the protection cavity 12 is provided with an opening for accommodating the head of a user to enter, and the opening can be further provided with a contraction rope, so that the opening can be tightened, and the phenomenon that external smoke or toxic gas enters the protection cavity 12 from a gap between the opening and the neck skin of the user to influence the use effect is avoided.

Referring to fig. 1 to 5, the main function of the dust exhaust channel 52 in the present application is to collect the particles deposited on the lower side wall of the installation chamber 51, and for this reason, the inlet end of the dust exhaust channel 52 is shaped like a funnel, which is designed to effectively converge the dust particles deposited on the lower side wall of the installation chamber 51 in the installation chamber 51. Wherein in order to collect the dust particle that drops on clean filter disc 71 cleanness dust screen 60 and the filter element group spare better, arrange ash passageway 52's entry end setting in the installation cavity 51 lie in the filter element group spare the place ahead position of admitting air on, the end setting in the below of installation cavity 51 of giving vent to anger of one-way exhaust hole 30, the one-way exhaust hole 30 spun air current of such design can cooperate gravity to outwards take away the dust particle in arranging ash passageway 52, realizes arranging the ash. Of course, in some embodiments, the receiving end of the dust exhaust passage 52 may also completely cover all active areas of the dust screen 60 and the filter element assembly, wherein the dust exhaust passage 52 is disposed between the dust screen 60 and the filter element assembly in the manner shown in fig. 5, which is only one example.

Referring to fig. 3 and 5, the water mist condensation phenomenon occurs on the goggles 40 mainly because the temperature of the inner side wall of the goggles 40 is higher than that of the outer side wall thereof, because a patient feels a lot of sweat due to tension or movement during the escape process, and the sweat is evaporated due to the skin temperature of the human body, so that a lot of water vapor exists in the protective cavity 12, and the water vapor or the water mist condensation phenomenon occurs due to the temperature of the inner side and the outer side of the goggles 40. In order to better demist the goggles 40, the air outlet end of the air suction hole 20 is communicated with the air inlet end of the air flow transmission pipeline 80, the air outlet end of the air flow transmission pipeline 80 is arranged on the corresponding area, located on any side edge of the goggles 40, of the inner side wall of the mask body 10, the air inlet end of the one-way exhaust hole 30 is connected with the collection cover 31, and the air inlet end of the collection cover 31 is arranged on the corresponding area, located on the opposite side of the air outlet end of the air flow transmission pipeline 80, of the inner side wall of the mask body 10. Wherein, outside cold air after purifying is inhaled in suction hole 20, cold air can be cooled down to goggles 40 inside wall effectively, take away the steam that condenses on goggles 40 simultaneously, at this moment, collect cover 31 and can receive these air that have steam effectively, and outside discharge to one-way exhaust hole 30, realized that the user of service breathes in the use and carries out defogging work to goggles 40 automatically, need not the user of service and carry out any other operations, only need breathe and to have improved this protective face mask's convenience in use and practicality.

Referring to fig. 5, in an improved embodiment of the present application, the air inlet end of the one-way exhaust hole 30 is communicated with the air injection channel 32, the air outlet end of the air injection channel 32 is communicated with the outlet end of the ash discharge channel 52, of course, the air injection channel 32 may also be disposed in the middle of the one-way exhaust hole 30 or on the air outlet end, which is designed as required, in the present application, the inlet end of the air injection channel 32 is directly opposite to the bottom of the collecting cover 31, such a design is convenient for increasing the flow rate of the air flow ejected by the air injection channel 32, and further improves the suction capability of the matching ash discharge channel 52. In addition, the air inlet end of the one-way exhaust hole 30 communicates with the side of the bottom of the collection cover 31. In order to prevent outside air from entering the installation cavity 51 from the ash discharge channel 52 when a user inhales, a deformable blocking tongue piece 33 is arranged between the air outlet end of the air injection channel 32 and the outlet end of the ash discharge channel 52, and the blocking tongue piece 33 can block the air outlet end of the air injection channel 32. The plugging tongue piece 33 is used for plugging the air outlet end of the air injection channel 32 immediately when a user inhales air, so that outside air cannot enter the protection cavity 12 or the breather valve 50 through the air injection channel 32, when the user exhales air, the plugging tongue piece 33 is flushed due to the existence of air flow, and the air flow ejected at high speed can take out dust particles deposited at the bottom of the dust exhaust channel 52 to realize dust exhaust.

In order to better blow away the water vapor condensed on the inner side wall of the goggles 40, in an improved embodiment of the present application, the air outlet end of the air flow transmission pipeline 80 is provided with an air outlet hopper 81, the small end of the air outlet hopper 81 is connected with the air outlet end of the air flow transmission pipeline 80, the large end of the air outlet hopper 81 is flat and forms a linear air outlet nozzle 82, and the length direction of the air outlet nozzle 82 is consistent with the length direction of the side edge of the corresponding side of the goggles 40. It should be noted that, because the goggles 40 are opposite to the eyes of the user and are generally in a strip shape, for this reason, the air outlet direction of the air outlet funnel 81 in the present application is arranged on the inner side wall of the mask body 10, which is located on the upper side of the goggles 40, and meanwhile, the length of the air outlet nozzle 82 is the same as the side edge of the goggles 40 in the length direction, so that when the user inhales air, the outside air is purified by the breather valve 50 and then is downwards sprayed out from the air outlet nozzle 82, and the condensed water mist on the goggles 40 can be just blown away. The collecting hood 31 is positioned on the side opposite to the air outlet nozzle 82, so that the collecting hood is positioned just below the goggles 40, and can collect and take away a part of air sprayed by the air outlet nozzle 82 and turbid air with water mist.

In this application, besides the air outlet end of the inhalation hole 20 communicating with the air flow transfer line 80 for demisting, in order not to affect the normal breathing of the user, in a modified embodiment of this application, the inhalation hole 20 is provided with an air outlet hole in the area corresponding to the nose when the user correctly wears the mask body 10, so as to facilitate the breathing of the user. In this application, air current transfer line 80, the structure of giving vent to anger fill 81 and collecting cover 31 all sets up in face guard body 10 or on the inside wall, because carry out the lock with user's face during face guard body 10's the inside wall, in order to guarantee a suitable breathing space, breather valve 50 is that outside protrusion sets up and is located corresponding user's nose region at face guard body 10, can also set up some structures of filling up on face guard body 10's the inner wall simultaneously, in order to play the effect of buffering.

Referring further to fig. 1-7, in order to better drive the cleaning filter disc 71 to clean the inlet end of the filter element assembly and the dust particles deposited on the dust barrier 60, in one embodiment of the present application, the adjustment rod 72 directly drives the cleaning filter disc 71 to rotate to clean the inlet end of the filter element assembly and the dust particles adhered to the dust barrier 60, but such a structure requires a certain skill and is difficult to clean carefully in a disaster site. For the sake of easy cleaning, the present application shows a specific structure of the adjusting rod 72 for driving the cleaning filter disc 71 to clean. Wherein, the peripheral side of regulating rod piece 72 is provided with a spiral guide groove 74, the movable sleeve of cleaning filter disc 71 is arranged on the corresponding outer wall of regulating rod piece 72 in installation cavity 51, and the inner ring of cleaning filter disc 71 is provided with a chuck 75 which can be clamped into spiral guide groove 74. The design is that when a user presses the adjusting rod piece 72, the adjusting rod piece 72 moves towards the face of the user, the cleaning filter disc 71 is simultaneously subjected to the same acting force along the moving direction of the adjusting rod piece 72 due to the limitation of the inner wall of the spiral guide groove 74, and the acting force along the circumferential direction of the adjusting rod piece 72 can drive the cleaning filter disc 71 to rotate, so that the cleaning structure 73 on the cleaning filter disc can rotate to clean dust particles adhered to the air inlet end of the filter element assembly. When the adjustment lever 72 is pulled out, the cleaning structure 73 is now close to the dust screen 60, so that the dust screen 60 can be cleaned. In the present case, the cleaning structures 73 are arranged on both sides of the cleaning disk 71, so that by pressing or pulling the adjusting lever 72, a rotation is achieved and the cleaning filter element assembly and the dust particles adhering to the dust screen 60 are approached. Since the cleaning structure 73 can be deformed in the present application, the cleaning filter disc 71 can be moved close to the dust-separation net 60 or the filter element assembly to clean dust particles by using the deformed cleaning structure 73, wherein the cleaning structure 73 can be a conventional dental film, a post tooth structure or a bristle structure.

It should be noted that, in order to better drive the adjusting rod 72 and avoid the adjusting rod 72 from rotating along with the cleaning filter disc 71 when being pressed or pulled, the adjusting rod 72 and the breather valve 50 can be limited from rotating by some limiting structures in the present application, so that the adjusting rod 72 can only move axially along the axial direction thereof. The limiting structure can be a conventional key groove structure or a conventional sliding block and sliding groove matched structure, and the application is not detailed here.

In a modified embodiment, in order to facilitate the resetting of the adjusting lever 72 after the operation, the adjusting lever 72 is movably sleeved with a return spring 7a in the area between the dust separation net 60 and the cleaning filter disc 71 and between the cleaning filter disc 71 and the filter element assembly. When a user presses the adjusting rod piece 72 to clean the filter element assembly, the return spring 7a between the cleaning filter disc 71 and the filter element assembly is compressed, when the user releases the adjusting rod piece 72, the return spring 7a can force the adjusting rod piece 72 to be pulled out and reset outwards, and the cleaning filter disc 71 rotates to realize secondary cleaning. Similarly, when the dust-proof net 60 is cleaned, the return spring 7a between the dust-proof net 60 and the cleaning filter disc 71 is compressed, and then after the user releases the adjusting rod member 72, the return spring 7a is reset, so that the adjusting rod member 72 is forced to retract inwards and reset, and then the cleaning filter disc 71 is close to the cleaning structure 73 on one side of the dust-proof net 60 to clean the dust-proof net 60. The whole structure is simple and convenient, repeated cleaning can be realized without secondary operation after the user operates the adjusting rod piece 72, the convenience of operation is improved, dust removal work can be conveniently carried out on a disaster site or a dust site, and the whole protective mask can be continuously used.

With further reference to fig. 2 to 7, the breather valve 50 includes a housing 53 and at least one-way air inlet valve 54 disposed on the housing 53, the mounting cavity 51 is disposed in the housing 53, and the bottom of the mounting cavity 51 is communicated with the inhalation hole 20; the mounting cavity 51 is communicated with the outside through the one-way air inlet valve 54, one outward end of the adjusting rod 72 movably penetrates through the shell 53, and a pressing part 76 is formed outside the shell 53; the ash discharge passage 52 is provided in a side wall of the housing 53. The shell 53 is detachably mounted on the structure of the mask body 10 corresponding to the inhalation hole 20, wherein the shell 53 is a cylindrical structure, and the shell 53 is provided with a hole for the adjusting rod 72 to pass through. The hole can be designed to be non-circular, and the end of the adjusting rod 72 that passes through the hole is matched with the shape of the hole, so that the adjusting rod 72 can be effectively prevented from rotating along with the cleaning filter disc 71 when the adjusting rod 72 is pulled or pressed. And the one-way intake valve 54 may be of conventional one-way valve body construction in this application.

With further reference to fig. 7 in some embodiments of the present application, the one-way intake valve 54 includes an intake cavity 541 and an intake hole 542 communicating the intake cavity 541 with the outside, the intake cavity 541 communicates with the installation cavity 51; the diameter of one end of the air inlet hole 542 close to the air inlet cavity 541 is larger than that of the other end; a first blocking bead 543 is movably arranged in the air inlet cavity 541. Due to the design, when the whole one-way air inlet valve 53 is normally used for inhaling, the whole first blocking bead 543 can not block the air inlet hole 542, when a user exhales, the air pressure in the whole mask body 10 is higher than the external air pressure, at the moment, the first blocking bead 543 can be pushed to block the air inlet hole 542, so that the exhaled air in the whole mask body 10 can be discharged outwards only through the one-way exhaust hole 30, and the one-way air flowing in and out of the mask body 10 is realized. Further, the structure of the one-way exhaust hole 30 in the present application may be identical to that of the one-way intake valve 54, but installed in the opposite direction. It should be noted that the one-way valve body is similar to the one-way intake valve 54 in structure in the present application, except that the conducting direction of the one-way valve body is the direction of the outward discharge of the ash discharge passage 52 when it is installed, and will not be described in detail herein.

With further reference to fig. 4 to 6, in the present application, the filter element assembly includes a bottom filter element 77 and a movable filter element 78, the movable filter element 78 is movably sleeved on the adjusting rod member 72, the inner ring of the movable filter element 78 is also provided with the chuck 75, and the chuck 75 is clamped in the spiral guide groove 74; in practice, bottom filter element 77 may be fixed to the bottom of mounting chamber 51, or may be movably mounted to adjustment rod 72, which is designed according to the requirement. If both bottom filter element 77 and movable filter element 78 are capable of moving on adjusting rod element 72, chuck 75 can also be disposed on the inner ring of bottom filter element 77, and at this time, two sets of spiral guide grooves 74 are needed, and the turning directions of two sets of spiral guide grooves 74 are different, or adjusting rod element 72 is disposed on the position corresponding to bottom filter element 77 and another set of spiral guide grooves 74 with turning directions different from the corresponding area of movable filter element 78. In this way, when the adjustment rod 72 is driven, the bottom filter sheet 77 and the movable filter sheet 78 can be moved close to or away from each other, so that the bottom filter sheet 77 and the movable filter sheet 78 can be effectively deformed to shake off dust particles adhered to the bottom filter sheet 77 and the movable filter sheet 78. In the present application, it is preferred that bottom filter 77 be of a fixed design and movable filter 78 be slidable on adjustment lever 72.

Wherein, a plurality of filter sheets 79 are arranged on the opposite sides of the bottom filter sheet 77 and the movable filter sheet 78 in a staggered manner, and the filter sheets 79 can be bent and deformed; the adjustment lever 72 can drive the movable filter 78 away from or toward the bottom filter 77 to vary the effective filter thickness of the filter element assembly. It should be noted that, when the whole adjusting rod 72 moves along its own axial direction, the spiral guide groove 74 can force the movable filter 78 to perform a circumferential rotation motion while pressing down, that is, gradually approaching the bottom filter 77, such design can force the filter 79 on the movable filter 78 to contact the filter 79 on the bottom filter 77, and at the same time, the filter 79 on the movable filter 78 drives the filter 79 on the bottom filter 77 to bend and deform in the spiral direction of the spiral guide groove 74, so that the overlapping phenomenon occurs, and further, the effect of increasing the filtering area and the breathing resistance is achieved. Such design especially uses in the environment that some poisonous flue gases produced is particularly important, and the filter thickness and the filter area of some filter element subassemblies at present are fixed, and it all can have a filterable limit, and consequently the filter thickness and the filter area of the filter element subassembly of various designs of this application are all adjustable, are convenient for adjust the filterability and the filter area of whole filter element subassembly according to actual service environment like this, have improved the convenience of using.

According to the protective mask for disaster relief, the dust isolating net 60 is arranged in the breather valve 50, and the cleaning filter disc 71 and the dust isolating net 60 can be used for primarily isolating large-particle dust in air from entering the filter element assembly, so that the situation that the normal air circulation of the filter element assembly is obstructed by the large-particle dust is avoided; the cleaning filter disc 71 can be driven to rotate by the adjusting rod piece 72 so as to scrape and clean the dust separation net 60 and dust deposition adhered to the air inlet end of the filter element assembly, the dust separation net 60 is convenient to conduct, and the ventilation area is increased. Meanwhile, the design of the cleaning filter disc 71 effectively increases the filtering area of the whole protective mask, and the deformable cleaning structure 73 can also clean large particles and tiny dust deposited on the cleaning filter disc 71 when the dust separation net 60 is scraped, so that the cleaning effect is good. In addition, the lower side wall of the outward end of the installation cavity 51 is communicated with the dust discharging channel 52, dust falling on the lower side wall of the installation cavity 51 can be effectively collected through the dust discharging channel 52, meanwhile, negative pressure formed by airflow discharged from the one-way exhaust hole 30 drives deposited micro dust in the dust discharging channel 52 to be discharged outwards, micro dust is prevented from being blocked in the installation cavity 51 and the dust discharging channel 52, and automatic dust cleaning is achieved.

The above embodiments are only for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the technical solutions of the present invention.

Claims

1. The utility model provides a protective face mask for relief of disaster, includes face guard body (10), at least one suction hole (20) and at least one-way exhaust hole (30) have on face guard body (10), be provided with goggles (40) on face guard body (10), its characterized in that still includes:

the breathing valve (50) is arranged on the inspiration hole (20), an installation cavity (51) is arranged in the breathing valve (50), and the outside is communicated with the inspiration hole (20) through the installation cavity (51); a filter element assembly is detachably mounted in the mounting cavity (51), an ash discharge channel (52) is communicated with the lower side wall of the outward end of the mounting cavity (51), and the ash discharge channel (52) is communicated with the air outlet end of the one-way exhaust hole (30) in an opening and closing manner;

a dust separation net (60) which can be detachably plugged in a corresponding area of the mounting cavity (51) positioned at the air inlet front end of the filter element assembly; and

the cleaning assembly (70) comprises a cleaning filter disc (71) and an adjusting rod piece (72), one end of the adjusting rod piece (72) can extend out of the mounting cavity (51), the other end of the adjusting rod piece sequentially and movably penetrates through the dust separation net (60) and the filter element assembly, the cleaning filter disc (71) is movably sleeved on an area, located between the filter element assembly and the dust separation net (60), of the adjusting rod piece (72), a plurality of deformable cleaning structures (73) are arranged on two sides of the cleaning filter disc (71), and the cleaning structures (73) can be abutted to the dust separation net (60) and the filter element assembly; a spiral guide groove (74) is formed in the peripheral side of the adjusting rod piece (72), the cleaning filter disc (71) is movably sleeved on the corresponding outer wall of the adjusting rod piece (72) in the installation cavity (51), and a clamping head (75) capable of being clamped into the spiral guide groove (74) is designed on the inner ring of the cleaning filter disc (71);

the air outlet end of the air suction hole (20) is communicated with an air inlet end of an air flow conveying pipeline (80), the air outlet end of the air flow conveying pipeline (80) is arranged on a corresponding area, located on any side edge of the goggles (40), of the inner side wall of the mask body (10), the air inlet end of the one-way exhaust hole (30) is connected with a collecting cover (31), the air inlet end of the collecting cover (31) is arranged on a corresponding area, located on one side opposite to the air outlet end of the air flow conveying pipeline (80), of the inner side wall of the mask body (10), the air inlet end of the one-way exhaust hole (30) is communicated with an air injection channel (32), the air outlet end of the air injection channel (32) is communicated with the outlet end of the ash discharge channel (52), a deformable plugging tongue piece (33) is arranged between the air outlet end of the air injection channel (32) and the outlet end of the ash discharge channel (52), and the plugging tongue piece (33) can plug the air outlet end of the air injection channel (32); the inlet end of the ash discharge channel (52) is arranged in the mounting cavity (51) and positioned in the air inlet front position of the filter element assembly, and the air outlet end of the one-way exhaust hole (30) is arranged below the mounting cavity (51);

the adjusting rod piece (72) can drive the cleaning filter disc (71) to rotate so as to scrape and clean the dust separation net (60).

2. A protective mask for disaster relief according to claim 1, wherein said breathing valve (50) comprises a housing (53) and at least one-way air inlet valve (54) arranged on the housing (53), said mounting cavity (51) is arranged in the housing (53), and the bottom of the mounting cavity (51) is communicated with the air suction hole (20); the mounting cavity (51) is communicated with the outside through the one-way air inlet valve (54), one outward end of the adjusting rod piece (72) movably penetrates through the shell (53), and a pressing part (76) is formed outside the shell (53); the ash discharge passage (52) is provided in a side wall of the housing (53).

3. A protective mask for disaster relief according to claim 2, wherein said one-way air intake valve (54) comprises an air intake chamber (541) and an air intake hole (542) communicating the air intake chamber (541) with the outside, said air intake chamber (541) communicating with the installation chamber (51); the diameter of one end of the air inlet hole (542) close to the air inlet cavity (541) is larger than that of the other end; a first blocking bead (543) is movably arranged in the air inlet cavity (541).

4. A disaster relief face shield according to any one of claims 1-3, wherein said filter element assembly comprises a bottom filter (77) and a movable filter (78), said movable filter (78) is movably sleeved on the adjusting rod (72), said inner ring of said movable filter (78) is also provided with said chuck (75), said chuck (75) is clamped in said spiral guide groove (74); a plurality of filter sheets (79) are arranged on opposite sides of the bottom filter sheet (77) and the movable filter sheet (78) in a staggered mode, and the filter sheets (79) can be bent and deformed; the adjustment lever (72) is capable of driving the movable filter element (78) away from or toward the bottom filter element (77) to vary the effective filter thickness of the filter element assembly.

5. The protective mask for disaster relief according to claim 1, wherein the adjusting rod member (72) is movably sleeved with a return spring (7 a) in the area between the dust-proof net (60) and the cleaning filter disc (71) and the area between the cleaning filter disc (71) and the filter element assembly.

6. The protective mask for disaster relief according to claim 1, wherein an air outlet funnel (81) is arranged at the air outlet end of the air flow transmission pipeline (80), the small end of the air outlet funnel (81) is connected with the air outlet end of the air flow transmission pipeline (80), the large end of the air outlet funnel (81) is flat and forms a straight air outlet nozzle (82), and the length direction of the air outlet nozzle (82) is consistent with the length direction of the side edge of the corresponding side of the goggles (40).

7. The protective face mask for disaster relief according to any one of claims 1-3, further comprising a soft protective head mask (11), wherein the edge of the soft protective head mask (11) is connected to the periphery of the mask body (10), the soft protective head mask (11) is buckled with the mask body (10) to form a protective cavity (12) for accommodating the head of a user; the mask is characterized in that connecting and fixing structures (13) are arranged on two sides of the mask body (10), and the connecting and fixing structures (13) can tightly buckle the mask body (10) on the face of a user to form airtight sealing.