CN117695547A - Mining high-efficient low-resistance dustproof mask - Google Patents
Mining high-efficient low-resistance dustproof mask Download PDFInfo
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- CN117695547A CN117695547A CN202410003579.0A CN202410003579A CN117695547A CN 117695547 A CN117695547 A CN 117695547A CN 202410003579 A CN202410003579 A CN 202410003579A CN 117695547 A CN117695547 A CN 117695547A
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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
- A62B23/00—Filters for breathing-protection purposes
- A62B23/02—Filters for breathing-protection purposes for respirators
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Abstract
A mining high-efficiency low-resistance dustproof mask, wherein a filter box is connected to a mask main body; the composite filter core is arranged in the filter box and isolates the inner cavity of the filter box into a pre-filter cavity and a post-filter cavity; the composite filter core consists of a metal base layer and a film coating layer; the metal base layer is made of a metal wire mesh, and irregular mesh holes are distributed on the mesh body; the metal base layer is sequentially provided with a plurality of grooves which are recessed towards the rear side along the length direction, and the recess depths of the plurality of grooves are different; the coating layer is a PTFE microporous film and is arranged on the surface of the front side of the metal base layer in a laminating way; the flow guiding ash removing pad is arranged in the filter box and is positioned at the rear side of the composite filter element; the front side of the flow guiding ash cleaning pad is provided with a plurality of protruding parts extending over the surface of the flow guiding ash cleaning pad, and the center of each protruding part is provided with a conical hole penetrating through the length direction of the protruding part, wherein the small opening end of the conical hole is positioned at the front end. The mask has good filtering effect, large dust holding capacity and long service life, can be used for purging, deashing and washing, and can be used repeatedly.
Description
Technical Field
The invention belongs to the technical field of dust prevention, and particularly relates to a mining high-efficiency low-resistance dust mask.
Background
Along with the continuous increase of mechanized mining level of coal mines, the problem of dust exposure is increasingly aggravated, and the dust concentration in the mines can reach 4000-8000mg/m at maximum 3 The normal work and health of mine workers are seriously affected. According to the ministry of health data, 2022 pneumoconiosis amounts to about 1 ten thousand cases, with silicosis and coal pneumoconiosis being the predominant pneumoconiosis, accounting for up to 90.8%, thus preventing pneumoconiosis has a high practical need. In this regard, wet dust suppression measures such as coal seam water injection, spray dust fall and the like are adopted in China, the working environment is improved to a certain extent, but due to certain hydrophobicity of coal dust, the dust concentration under the wet dust suppression measures still exceeds the national standard, so that wearing individual dustproof equipment becomes an effective means for protecting mine workers from pneumoconiosis.
The coal mine is in a high-concentration dust environment in the pit, and the dust protection level requirement is high. At present, mine operators wear self-priming KN95 and KN100 masks to carry out dust protection, KN95 adopts one-piece electrostatic adsorption filter cotton or active carbon fiber cotton to carry out protection, the dust filtration efficiency is 95%, the wearing comfort is higher, the respiratory resistance is smaller, but the filtration efficiency on respiratory dust (dust aerodynamic diameter is less than 7.07 mu m) is poor; the filtration efficiency of KN100 is 99.97%, can effectively isolate the respiratory dust, prevent the emergence of pneumoconiosis, and it is most on KN 95's basis with the filter media thickening treatment in order to realize higher protection efficiency, this has also led to its wearing travelling comfort lower, and the respiratory resistance is great, and especially colliery is engaged in high strength operation personnel in the pit and very easily gives up wearing because of the respiratory resistance is big. In addition, the existing dust mask has the problem that the dust holding amount is small, the service life of the existing dust mask is short when the existing dust mask is used in a high-dust-concentration environment, the replacement frequency is high, and the protection cost is increased. Therefore, there is a need to provide a dust mask having high dust-proof efficiency, low respiratory resistance, good wearing comfort, and a large dust-holding capacity.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the mining high-efficiency low-resistance dustproof mask which has small breathing resistance, good wearing comfort, high dust holding capacity and good filtering performance, has long service life, can be used for purging, deashing and washing, can be repeatedly used, and is beneficial to reducing the protection cost.
In order to achieve the aim of the invention, the invention provides a mining high-efficiency low-resistance dustproof mask, which comprises a mask main body, a filter box, a composite filter element and a diversion ash removal pad;
the filter box is connected to the mask main body;
the composite filter core is arranged in the filter box and isolates the inner cavity of the filter box into a pre-filter cavity and a post-filter cavity; the composite filter core consists of a metal base layer and a film coating layer;
the metal base layer is made of a metal wire mesh, and irregular holes are distributed on the mesh body of the metal base layer; the metal base layer is sequentially provided with a plurality of grooves which are recessed towards the rear side along the length direction, and the recess depths of the plurality of grooves are different;
the film coating layer is a PTFE microporous film and is arranged on the surface of the front side of the metal base layer in a laminating way;
the flow guide ash removing pad is arranged in the filter box and is positioned at the rear side of the composite filter element; the front side of the flow guiding ash cleaning pad is provided with a plurality of protruding parts extending over the surface of the flow guiding ash cleaning pad, and the center of each protruding part is provided with a conical hole penetrating through the length direction of the protruding part, wherein the small opening end of the conical hole is positioned at the front end.
According to the invention, the grooves with different depths which are recessed towards the rear side are sequentially arranged in the length direction of the metal base layer, compared with the traditional planar filter material or the filter material with a plurality of folds with uniform depths, the filter area and dust volume of the filter material in a limited area can be obviously increased through the grooves with different depths, the filter effect is improved, the dust holding capacity is also obviously increased, and the effective service time of the filter element is prolonged. In addition, the grooves with different depths can guide and disperse the air flow entering the pre-filtration chamber more uniformly and effectively through the unique geometric shapes of the grooves, so that the air can change more directions when passing through the filter element, the multidirectional air flow path increases the opportunity that suspended particles in the air are contacted with the surface of the filter material, the capture efficiency of the particles is improved, meanwhile, the dispersed air flow path reduces the pressure concentration at any single point, the reduction of the overall respiratory resistance is facilitated, and the comfort of a user is greatly improved. Furthermore, the grooves with different depths create additional collision and interception points, so that particles are more easily disturbed by the structures and finally caught when passing through the filter material, and the success rate of dust catching is improved. The PTFE microporous membrane has a microporous structure with staggered fibers, the porosity can reach 80% -90%, the microporous structure is special, no through holes exist, the aperture is small and uniform, dust particles can be effectively intercepted, the PTFE microporous membrane has a surface filtering mechanism and good non-adhesive capacity, the PTFE microporous membrane is strong in hydrophobicity, good in durability and low in surface tension, dust accumulated on the surface can be easily and effectively removed, the filtering performance of the PTFE microporous membrane can be quickly recovered through washing or back blowing, the PTFE microporous membrane has a long service life, and the filtering efficiency can reach 99.999995%. Therefore, the PTFE microporous membrane is adopted as a membrane covering layer, the special microporous structure of the PTFE microporous membrane can be fully utilized, only gas can pass through the PTFE microporous membrane, dust can not enter the inside of the membrane or the substrate through the surface of the membrane, and meanwhile, the dust can be filtered and remained on the surface of the membrane by utilizing the processes of direct interception, collision, brownian motion, electret effect and the like, so that the high-efficiency separation of the dust and the gas is realized. The invention effectively combines the metal base layer and the film coating layer, fully utilizes the structural stability of the metal base layer, the low surface tension, the water resistance and the special micropore structure of the film coating layer, and ensures that the composite filter core has the characteristics of washability, good antistatic performance and repeated beating for ash removal, so that when the dust accumulated on the filter core is excessive, the accumulated dust on the filter core can be removed conveniently by means of washing, beating and the like, and the repeated utilization of the filter core can be realized. The rear side of the composite filter element is provided with the flow guide ash removal pad with the plurality of protruding parts, the center of the protruding parts is provided with the conical hole, and meanwhile, the small opening end of the conical hole is positioned at the front end, so that when in air suction, the air inlet resistance can be obviously reduced by utilizing the transition change of gradually increasing the aperture, and the flow speed of the air inlet air flow is reduced, thereby effectively reducing the respiratory pressure and the respiratory resistance, being beneficial to ensuring that the whole respiratory process is performed more smoothly and naturally, and simultaneously, the reduction of the flow speed of the air flow can be beneficial to improving the purification effect of the air. In addition, when the air flow passes reversely, the air flow can flow out through the smaller end and then is ejected out, the air flow is accelerated when passing through the diversion layer due to the design of gradually reducing the cross section from wide to narrow, so that a jet flow effect is generated, when the air flow passes through the shrinkage channel, the cross section area of the inner part of the pipeline is reduced, the flow speed of the air flow can be increased, and meanwhile, the pressure of the air flow can also be increased. The accelerated and pressurized air flow has stronger impact force when passing through the filter element layer, and can more effectively wash and remove the particles attached to the surface of the filter material. In addition, because the water conservancy diversion deashing pad can provide the efflux effect repeatedly many times, therefore can clear away the granule on the accumulation filter media repeatedly, can not only clear away the dust on filter media surface by this process high-efficiently, still prevented deep infiltration and piling up of particulate matter, it can reduce the performance decline or the risk of blocking that the filter media leads to because of particulate matter piles up, high filtration ability and the permeability of filter layer have been maintained, this has not only ensured the high filtration efficiency during the use, and also effectively alleviate the problem that the filter core layer appears breathing resistance and increases after long-time use, the frequency and the degree of difficulty of filter core maintenance have been reduced, the effective life cycle of filter core has been prolonged, stability and reliability in high concentration dust operation place have been guaranteed, simultaneously, user's travelling comfort experience has also been strengthened. The mask has the advantages of small respiratory resistance, good wearing comfort, high dust holding capacity, good filtering performance, long service life, capability of purging, ash removal and washing cleaning, repeated use for multiple times, contribution to reducing protection cost and good popularization and application prospect.
Further, in order to better improve the filtering effect, and simultaneously, in order to further improve the dust holding capacity, the plurality of grooves are formed by dust holding filtering units I and dust holding filtering units II which are alternately distributed in sequence;
the first dust-containing filtering unit is a deep groove or a plurality of deep grooves which are distributed continuously, and the second dust-containing filtering unit is a shallow groove or a plurality of shallow grooves which are distributed continuously.
Through the combination setting of regular depth recess, can be when increasing filter core effective filtration area, increase and hold the dirt volume, make the holistic stability of filter core better, simultaneously, be favorable to guaranteeing that the different regions of filter core homoenergetic plays good filter effect.
Further, in order to equalize the filtering pressure, the thickness of the coating layer is greater in the respiratory core area portion than in the respiratory auxiliary area portion. The structure of the filter element is effectively optimized, through the design of the variable density gradient, the airflow resistance of the respiratory core area part is larger in the expiration process, and meanwhile, the airflow resistance of the respiratory auxiliary area part is smaller, so that when the inspiration negative pressure acts on the filtered cavity, the entering airflow can be better dispersed to the respiratory auxiliary areas on two sides, the overuse and quick failure of the respiratory core area are reduced through the diversion of the airflow, the whole filter element layer can be more uniformly utilized, the whole area of the composite filter element can play a good filtering role, the aim of partition purification is fulfilled, the integral airflow resistance is reduced, the service life and the replacement period of each part of the filter element are guaranteed, the occurrence of waste is avoided, and meanwhile, the respiratory auxiliary area can be more fully used for capturing dust, and the utilization efficiency of the respiratory auxiliary area is remarkably improved. Therefore, through the design of the variable density gradient, the invention optimizes the air flow distribution and the resistance characteristic of the whole filter element layer while maintaining the high-efficiency filtering performance, so that the filter element layer can meet the requirements of long-time wearing and high-efficiency filtering.
Further, in order to improve the dust holding capacity of the groove, the cross section of the groove is trapezoid or U-shaped, and when the cross section of the groove is trapezoid, the opening end of the groove corresponds to the long side of the trapezoid. When the cross section of the groove is trapezoidal, the groove is of an involute structure, so that the filtering area and the volume of a single groove are remarkably improved, and the integral filtering area and the volume of the filter element are increased.
Further, to better equalize the filtering pressure, the distribution density of the plurality of grooves in the respiratory core region is greater than the distribution density of the plurality of grooves in the respiratory assistance region. The distribution density of the grooves in the breathing core area is larger, the distribution density of the grooves in the breathing auxiliary area is smaller, the airflow resistance of the breathing core area can be further increased, meanwhile, the airflow resistance of the breathing auxiliary area is further reduced, the airflow can be better dispersed into the breathing auxiliary areas on the two sides, and the filter element can be further fully utilized in all parts.
Further, the lateral dimensions of the grooves in the breathing core area are smaller than the lateral dimensions of the grooves in the breathing assistance area. The transverse size of the groove in the breathing core area is larger, the effective filtering area and the effective volume of the filter element in the breathing core area can be further increased, the filtering effect and the dust holding capacity of the breathing area can be further remarkably improved, and the whole service life is prolonged.
Further, the outer contour of the protrusion is conical or cylindrical. The outer contour of the protruding part is conical or cylindrical, and the composite filter core can be supported and isolated to a certain extent, so that an airflow buffer chamber can be formed between the composite filter core and the guide ash removal pad main body, and the airflow can smoothly enter the post-filter chamber.
Further, in order to ensure that the air flow entering the filter box can not directly enter the filtered cavity from the peripheral edge of the composite filter element, the peripheral edge part of the composite filter element is in sealing connection with the peripheral edge part of the inner cavity of the filter box through the first sealing component, and in order to ensure that the air flow can more effectively act on the composite filter element when passing reversely, so as to realize a more efficient ash removal effect, the peripheral edge part of the flow guiding ash removal pad is in sealing connection with the peripheral edge part of the composite filter element through the second sealing component.
Further, in order to facilitate maintenance and replacement of the filter assembly, the filter box is of a transversely extending arc-shaped structure and is formed by buckling a front side shell and a rear side shell relatively;
an air inlet groove communicated with the pre-filtration cavity is formed in the front side shell;
the upper part of the rear side surface of the rear side shell is fixedly connected with a first air passage connector communicated with the filtered cavity;
the lower part of the mask main body is provided with an air outlet, and a breather valve is arranged in the air outlet; the upper part of the mask main body is provided with an air inlet, an air suction valve is arranged in the air inlet, and meanwhile, the front side of the mask main body is connected with a second air passage connector communicated with the air inlet, and the second air passage connector is matched with the first air passage connector; the mask body is connected with the filter box through a second gas circuit connector and a first gas circuit connector which are connected with each other. Through connect gas circuit joint one on the rear side shell, not only can be convenient for establish the connection gas circuit between filter cartridge and the face guard main part, but also can utilize gas circuit joint one directly to blow in the deashing air current to the cavity after straining in the in-process of deashing, easily realize the high-efficient operation of cleaing away of dust attached to compound filter core.
Further, in order to facilitate rapid assembly and rapid separation between the mask body and the filter box, the sections of the first air passage connector and the second air passage connector are circular or elliptical, and the first air passage connector and the second air passage connector are connected in a sleeved mode.
Drawings
FIG. 1 is a schematic diagram of a split construction of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a rear view of the present invention;
FIG. 4 is a schematic view of the structure of the composite filter element of the present invention;
FIG. 5 is a partial schematic view of FIG. 5;
FIG. 6 is a schematic structural view of a deflector ash pad according to the invention.
In the figure: 1. the mask comprises a mask main body, 2, a filter box, 3, a composite filter core, 4, a metal base layer, 5, a film coating layer, 6, a flow guiding ash removing pad, 7, a protruding part, 8, a groove, 9, a conical hole, 10, a deep groove, 11, a shallow groove, 12, a front side shell, 13, a rear side shell, 14, an air inlet groove, 15, a first air passage connector, 16, a second air passage connector, 17, an air outlet, 18, a breather valve, 19, an air inlet, 20, an air suction valve, 21 and a hanging lug.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 6, the invention provides a mining high-efficiency low-resistance dustproof mask, which comprises a mask main body 1, a filter box 2, a composite filter element 3 and a diversion ash removal pad 6;
the filter box 2 is connected to the mask main body 1, and the inner cavity of the filter box 2 is connected with the inner cavity of the mask main body 1 through a breathing channel; preferably, the filter box 2 has a transversely extending arc structure, and two ends of the filter box are in arc transition towards the direction approaching the face;
the composite filter element 3 is arranged in the filter box 2 and isolates the inner cavity of the filter box 2 into a pre-filtration chamber and a post-filtration chamber;
the composite filter element 3 can be subjected to partition protection design by adopting a targeted structural design according to the breathing characteristics of a human body and the adhesion characteristics of dust, and specifically, the breadth of the composite filter element 3 is enabled to be a breathing core area at the part close to a breathing channel, and two breathing auxiliary areas are formed at the two side areas far from the breathing channel; wherein, the composite filter element 3 consists of a metal base layer 4 and a film coating layer 5;
the metal base layer 4 is made of a metal wire mesh, and irregular holes are distributed on the mesh body of the metal base layer; the metal base layer 4 is sequentially provided with a plurality of grooves 8 which are recessed towards the rear side along the length direction, and the recess depths of the plurality of grooves 8 are different; in the worn state, the recess 8 extends in a vertical manner. According to the invention, the grooves with different depths which are recessed towards the rear side are sequentially arranged in the length direction of the metal base layer, compared with the traditional planar filter material or the filter material with a plurality of folds with uniform depths, the filter area and dust volume of the filter material in a limited area can be obviously increased through the grooves with different depths, the filter effect is improved, the dust holding capacity is also obviously increased, and the effective service time of the filter element is prolonged. In addition, the grooves with different depths can guide and disperse the air flow entering the pre-filtration chamber more uniformly and effectively through the unique geometric shapes of the grooves, so that the air can change more directions when passing through the filter element, the multidirectional air flow path increases the opportunity that suspended particles in the air are contacted with the surface of the filter material, the capture efficiency of the particles is improved, meanwhile, the dispersed air flow path reduces the pressure concentration at any single point, the reduction of the overall respiratory resistance is facilitated, and the comfort of a user is greatly improved. Furthermore, the grooves with different depths create additional collision and interception points, so that particles are more easily disturbed by the structures and finally caught when passing through the filter material, and the success rate of dust catching is improved.
The film coating layer 5 is arranged on the surface of the front side of the metal base layer 4 in a laminating way; the coating layer 5 is preferably a PTFE microporous membrane. The PTFE microporous membrane has a microporous structure with staggered fibers, the porosity can reach 80% -90%, the microporous structure is special, no through holes exist, the aperture is small and uniform, dust particles can be effectively intercepted, the surface filtering mechanism and the good non-adhesion capability are realized, meanwhile, the PTFE microporous membrane, as a novel nano filter material, has the advantages of high chemical stability, high and low temperature resistance, corrosion resistance, weather resistance, high lubrication, good non-adhesion, air permeability, hydrophobicity, good durability, low surface tension, flexibility and the like, dust accumulated on the surface can be easily and effectively removed, the filtering performance can be quickly recovered through water washing or back blowing, the service life is long, and the filtering efficiency can reach 99.999995%. Therefore, the PTFE microporous membrane is adopted as a membrane covering layer, the special microporous structure of the PTFE microporous membrane can be fully utilized, only gas can pass through the PTFE microporous membrane, dust can not enter the inside of the membrane or the substrate through the surface of the membrane, and meanwhile, the dust can be filtered and remained on the surface of the membrane by utilizing the processes of direct interception, collision, brownian motion, electret effect and the like, so that the high-efficiency separation of the dust and the gas is realized. Utilize PTFE microporous membrane to carry out dust filtration, not only can play good filter effect, simultaneously, can effectively prevent the accumulational problem of dust adhesion and produce to can make compound filter core be but the washing filter core, effectively prolonged the life of filter core.
The invention effectively combines the metal base layer and the film coating layer, fully utilizes the structural stability of the metal base layer, the low surface tension, the water resistance and the special micropore structure of the film coating layer, and ensures that the composite filter core has the characteristics of washability, good antistatic performance and repeated beating for ash removal, so that when the dust accumulated on the filter core is excessive, the accumulated dust on the filter core can be removed conveniently by means of washing, beating and the like, and the repeated utilization of the filter core can be realized.
The flow guide ash removal pad 6 is arranged in the filter box 2 and is positioned at the rear side of the composite filter element 3; the front side of the flow guiding ash cleaning pad 6 is provided with a plurality of protruding parts 7 extending over the surface thereof, and the center of each protruding part 7 is provided with a conical hole 9 penetrating through the length direction thereof, wherein the small opening end of the conical hole 9 is positioned at the front end. The outer contour of the protrusion 7 may be conical or cylindrical. The outer contour of the protruding part is conical or cylindrical, and the composite filter core can be supported and isolated to a certain extent, so that an airflow buffer chamber can be formed between the composite filter core and the guide ash removal pad main body, and the airflow can smoothly enter the post-filter chamber. The protruding portion 7 is preferably conical in shape, so that a more stable supporting effect can be obtained.
As a further preferred option, the guiding ash cleaning pad 6 is provided with a plurality of rows of protruding parts 7 in sequence along the length direction, the plurality of rows of protruding parts 7 are arranged in one-to-one correspondence with the plurality of grooves 8 on the metal base layer 4, and in the assembling process, each row of protruding parts 7 on the guiding ash cleaning pad 6 is aligned with each groove 8 on the composite filter 3, therefore, the reverse ash cleaning airflow can be enabled to intensively act on the corresponding groove 8 in the ash cleaning process, and dust attached to the composite filter element 3 can be removed more efficiently.
The rear side of the composite filter element is provided with the flow guide ash removal pad with the plurality of protruding parts, the center of the protruding parts is provided with the conical hole, and meanwhile, the small opening end of the conical hole is positioned at the front end, so that when in air suction, the air inlet resistance can be obviously reduced by utilizing the transition change of gradually increasing the aperture, and the flow speed of the air inlet air flow is reduced, thereby effectively reducing the respiratory pressure and the respiratory resistance, being beneficial to ensuring that the whole respiratory process is performed more smoothly and naturally, and simultaneously, the reduction of the flow speed of the air flow can be beneficial to improving the purification effect of the air. In addition, when the air flow passes reversely, the air flow can flow out through the smaller end and then is ejected out, the air flow is accelerated when passing through the diversion layer due to the design of gradually reducing the cross section from wide to narrow, so that a jet flow effect is generated, when the air flow passes through the shrinkage channel, the cross section area of the inner part of the pipeline is reduced, the flow speed of the air flow can be increased, and meanwhile, the pressure of the air flow can also be increased. The accelerated and pressurized air flow has stronger impact force when passing through the filter element layer, and can more effectively wash and remove the particles attached to the surface of the filter material. In addition, because the water conservancy diversion deashing pad can provide the efflux effect repeatedly many times, therefore can clear away the granule on the accumulation filter media repeatedly, can not only clear away the dust on filter media surface by this process high-efficiently, still prevented deep infiltration and piling up of particulate matter, it can reduce the performance decline or the risk of blocking that the filter media leads to because of particulate matter piles up, high filtration ability and the permeability of filter layer have been maintained, this has not only ensured the high filtration efficiency during the use, and also effectively alleviate the problem that the filter core layer appears breathing resistance and increases after long-time use, the frequency and the degree of difficulty of filter core maintenance have been reduced, the effective life cycle of filter core has been prolonged, stability and reliability in high concentration dust operation place have been guaranteed, simultaneously, user's travelling comfort experience has also been strengthened. The mask has the advantages of small respiratory resistance, good wearing comfort, high dust holding capacity, good filtering performance, long service life, capability of purging, ash removal and washing cleaning, and repeated use.
In order to better improve the filtering effect and further improve the dust holding capacity, the grooves 8 are composed of dust holding filtering units I and dust holding filtering units II which are alternately distributed in sequence;
the first dust-containing filtering unit is a deep groove 10 or a plurality of deep grooves 10 which are continuously distributed, and the second dust-containing filtering unit is a shallow groove 11 or a plurality of shallow grooves 11 which are continuously distributed, wherein the depth of the deep groove 10 is larger than that of the shallow groove 11. Preferably, the depth of the deep grooves 10 in the first dust-holding filter units is the same, and the depth of the shallow grooves 11 in the second dust-holding filter units is the same. Through the combination setting of regular depth recess, can be when increasing filter core effective filtration area, increase and hold the dirt volume, make holistic stability of filter core better, simultaneously, be favorable to guaranteeing that the different regions homoenergetic of filter core plays good filter effect.
In order to equalize the filtering pressure, the thickness of the coating layer 5 is greater in the respiratory core area than in the respiratory auxiliary area. The structure of the filter element is effectively optimized, through the design of the variable density gradient, the airflow resistance of the respiratory core area part is larger in the expiration process, and meanwhile, the airflow resistance of the respiratory auxiliary area part is smaller, so that when the inspiration negative pressure acts on the post-filtration cavity, the airflow entering the pre-filtration cavity can be better dispersed to the respiratory auxiliary areas on two sides, the overuse and quick failure of the respiratory core area are reduced through the diversion of the airflow, the whole filter element layer can be more uniformly utilized, the whole area of the composite filter element can play a good filtering role, the aim of partition purification is fulfilled, the integral airflow resistance is reduced, the service life and the replacement period of each part of the filter element are guaranteed, the occurrence of the waste condition is avoided, and meanwhile, the respiratory auxiliary area can capture dust more fully, and the utilization efficiency of the respiratory auxiliary area is remarkably improved. Therefore, through the design of the variable density gradient, the invention optimizes the air flow distribution and the resistance characteristic of the whole filter element layer while maintaining the high-efficiency filtering performance, so that the filter element layer can meet the requirements of long-time wearing and high-efficiency filtering.
As a further preferable aspect, for better realizing the purpose of partition purification, the film coating layer 5 has an axisymmetric structure, and both halves thereof are divided into a plurality of filter segments from the respiratory core region to the respiratory auxiliary region, and the thicknesses of the plurality of filter segments are sequentially thinned step by step.
In order to increase the dust holding capacity of the groove, the cross section of the groove 8 is trapezoid or U-shaped, preferably trapezoid, and when the cross section of the groove 8 is trapezoid, the opening end of the groove 8 corresponds to the long side of the trapezoid. When the cross section of the groove is trapezoidal, the groove is of an involute structure, so that the filtering area and the volume of a single groove are remarkably improved, and the integral filtering area and the volume of the filter element are increased.
In order to better equalize the filtering pressure, the distribution density of the plurality of grooves 8 in the breathing core area is greater than the distribution density of the plurality of grooves 8 in the breathing assistance area. The distribution density of the grooves in the breathing core area is larger, the distribution density of the grooves in the breathing auxiliary area is smaller, the airflow resistance of the breathing core area can be further increased, meanwhile, the airflow resistance of the breathing auxiliary area is further reduced, the airflow can be better dispersed into the breathing auxiliary areas on the two sides, and the filter element can be further fully utilized in all parts. As a further preferred option, in order to match the variable density gradient design of the thickness of the coating layer 5 gradually becoming thinner from the respiratory core region to the respiratory auxiliary region, so as to achieve a better airflow dispersion effect, the filtering operation is performed by using each region of the composite filter element 3 more efficiently, and the distribution density of the plurality of grooves 8 (the interval between the adjacent grooves 8) is reduced stepwise from the respiratory core region to the respiratory auxiliary region.
The lateral dimensions of the grooves 8 in the breathing core area are smaller than the lateral dimensions of the grooves 8 in the breathing assistance area. The transverse size of the groove in the breathing core area is larger, the effective filtering area and the effective volume of the filter element in the breathing core area can be further increased, the filtering effect and the dust holding capacity of the breathing area can be further remarkably improved, and the whole service life is prolonged. As a further preference, the lateral dimensions of the plurality of grooves 8 decrease stepwise from the breathing core area to the breathing assistance area in order to achieve an optimization of the filtering efficiency.
In order to ensure that the air flow entering the filter box can not directly enter the filtered cavity from the peripheral edge of the composite filter element, the peripheral edge part of the composite filter element 3 is in sealing connection with the peripheral edge part of the inner cavity of the filter box 2 through the first sealing component, and in order to ensure that the air flow can more effectively act on the composite filter element when passing reversely, so as to realize a more efficient ash removal effect, the peripheral edge part of the flow guiding ash removal pad 6 is in sealing connection with the peripheral edge part of the composite filter element 3 through the second sealing component.
In order to facilitate maintenance and replacement of the filter assembly, the filter cartridge 2 is formed by relatively fastening the front side housing 12 and the rear side housing 13, and assembling and separating processes of the front side housing 12 and the rear side housing 13 can be facilitated by a fastening assembly mode. Of course, screw holes may be provided at the edge portions where the front side case 12 and the rear side case 13 are connected, and the front side case 12 and the rear side case 13 may be connected more stably by bolts;
the front side shell 12 is provided with an air inlet groove 14 communicated with the pre-filtering cavity, and as a further preferable mode, the area of the air inlet groove 14 extends from the breathing core area to the breathing auxiliary area, and the whole area of the air inlet groove 14 is elliptical or rectangular, so that the area of the air inlet groove 14 is larger, the air inlet resistance can be further reduced, the breathing resistance is further reduced, and the comfort level of a wearer is improved;
the upper part of the rear side surface of the rear side shell 13 is fixedly connected with a first air passage connector 15 communicated with the filtered cavity, and as a further preferred mode, the first air passage connector 15 is positioned in the central area of the filter box 2 in the width direction, and the first air passage connector 15 is a breathing passage between the filter box 2 and the mask main body 1; through connect gas circuit joint one on the rear side shell, not only can be convenient for establish the connection gas circuit between filter cartridge and the face guard main part, but also can utilize gas circuit joint one directly to blow in the deashing air current to the cavity after straining in the in-process of deashing, easily realize the high-efficient operation of cleaing away of dust attached to compound filter core.
The lower part of the mask main body 1 is provided with an air outlet 17, and a breather valve 18 is arranged in the air outlet 17; the upper part of the mask main body 1 is provided with an air inlet 19, an air suction valve 20 is arranged in the air inlet 19, meanwhile, the front side of the mask main body 1 is connected with a second air passage connector 16 communicated with the air inlet 19, and the second air passage connector 16 is matched with the first air passage connector 15; the mask body 1 is connected with the filter box 2 through a second gas circuit connector 16 and a first gas circuit connector 15 which are connected with each other.
In order to facilitate rapid assembly and rapid detachment between the mask body and the filter box, the sections of the first air passage connector 15 and the second air passage connector 16 are circular or elliptical, and the two connectors are connected in a sleeved mode.
As a further preferred option, the periphery of the opening end of the mask body 1 is made of silica gel, so that the periphery of the mask body 1 can be more attached to the face, and the wearing comfort is improved and the tightness in the protection process can be ensured. Wherein, two hanging lugs 21 can be symmetrically arranged on two sides of the mask body 1 for fixing the wearing rope or the elastic band, and the mask body 1 can be stably connected on the face of a wearer through the arrangement of the fixing wearing rope or the elastic band.
Claims (10)
1. The mining high-efficiency low-resistance dustproof mask comprises a mask main body (1) and a filter box (2), wherein the filter box (2) is connected to the mask main body (1), and is characterized by further comprising a composite filter element (3) and a diversion ash removal pad (6);
the composite filter element (3) is arranged in the filter box (2) and isolates the inner cavity of the filter box (2) into a pre-filter cavity and a post-filter cavity; the composite filter element (3) consists of a metal base layer (4) and a film coating layer (5);
the metal base layer (4) is made of a metal wire mesh, and irregular holes are distributed on the mesh body of the metal base layer; the metal base layer (4) is sequentially provided with a plurality of grooves (8) which are recessed towards the rear side along the length direction, and the recess depths of the plurality of grooves (8) are different;
the film coating layer (5) is a PTFE microporous film, and the film coating layer (5) is arranged on the surface of the front side of the metal base layer (4) in a laminating way;
the flow guide ash removal pad (6) is arranged in the filter box (2) and is positioned at the rear side of the composite filter element (3); the front side of the flow guiding ash removing pad (6) is provided with a plurality of protruding parts (7) extending over the surface of the front side, the center of each protruding part (7) is provided with a conical hole (9) penetrating through the length direction of the protruding part, and the small opening end of each conical hole (9) is positioned at the front end.
2. The mining high-efficiency low-resistance dustproof mask according to claim 1, wherein the grooves (8) are formed by dust containing filter units I and dust containing filter units II which are alternately distributed in sequence;
the first dust-containing filtering unit is a deep groove (10) or a plurality of deep grooves (10) which are distributed continuously, and the second dust-containing filtering unit is a shallow groove (11) or a plurality of shallow grooves (11) which are distributed continuously.
3. A mining high efficiency low resistance dust mask according to claim 1 or 2, wherein the thickness of the film layer (5) is greater in the respiratory core area than in the respiratory auxiliary area.
4. The mining high-efficiency low-resistance dustproof mask according to claim 3, wherein the cross section of the groove (8) is trapezoid or U-shaped, and when the cross section of the groove (8) is trapezoid, the open end of the groove (8) corresponds to the long side of the trapezoid.
5. A mining high efficiency low drag dust mask according to claim 3, wherein the distribution density of the plurality of grooves (8) in the respiratory core area is greater than the distribution density of the plurality of grooves (8) in the respiratory assist area.
6. A mining high efficiency low resistance dust mask according to claim 4, wherein the transverse dimension of the recess (8) in the breathing core area is smaller than the transverse dimension of the recess (8) in the breathing assistance area.
7. A mining high efficiency low resistance dust mask according to claim 1, characterized in that the outer contour of the protrusion (7) is conical or cylindrical.
8. The mining high-efficiency low-resistance dustproof mask according to claim 1, wherein the peripheral edge part of the composite filter element (3) is connected with the peripheral edge part of the inner cavity of the filter box (2) in a sealing way through a first sealing component, and the peripheral edge part of the flow guiding ash removing pad (6) is connected with the peripheral edge part of the composite filter element (3) in a sealing way through a second sealing component.
9. The mining high-efficiency low-resistance dustproof mask according to claim 1, wherein the filter box (2) is of a transversely extending arc structure and is formed by relatively buckling a front side shell (12) and a rear side shell (13);
an air inlet groove (14) communicated with the pre-filtration cavity is formed in the front side shell (12);
the upper part of the rear side surface of the rear side shell (13) is fixedly connected with a first air passage connector (15) communicated with the filtered cavity;
an air outlet (17) is formed in the lower part of the mask main body (1), and a breather valve (18) is arranged in the air outlet (17); an air inlet (19) is formed in the upper portion of the mask main body (1), an air suction valve (20) is arranged in the air inlet (19), meanwhile, a second air passage connector (16) communicated with the air inlet (19) is connected to the front side of the mask main body (1), and the second air passage connector (16) is matched with the first air passage connector (15); the mask main body (1) is connected with the filter box (2) through a second gas circuit connector (16) and a first gas circuit connector (15) which are connected with each other.
10. The mining high-efficiency low-resistance dustproof mask according to claim 9, wherein the sections of the first air passage connector (15) and the second air passage connector (16) are round or elliptical, and the first air passage connector and the second air passage connector are connected in a sleeved mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410003579.0A CN117695547B (en) | 2024-01-02 | 2024-01-02 | A high-efficiency, low-resistance dustproof mask for mining |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410003579.0A CN117695547B (en) | 2024-01-02 | 2024-01-02 | A high-efficiency, low-resistance dustproof mask for mining |
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| CN117695547A true CN117695547A (en) | 2024-03-15 |
| CN117695547B CN117695547B (en) | 2026-03-24 |
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| CN202410003579.0A Active CN117695547B (en) | 2024-01-02 | 2024-01-02 | A high-efficiency, low-resistance dustproof mask for mining |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119034126A (en) * | 2024-09-23 | 2024-11-29 | 中国安全生产科学研究院 | Step filtering dustproof mask |
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| CN103230706A (en) * | 2013-04-27 | 2013-08-07 | 中材科技股份有限公司 | Replaceable film filter core for PM2.5 purifying mouth mask and preparation method of filter core |
| CN207905965U (en) * | 2018-03-09 | 2018-09-25 | 周天娇 | New air filter |
| KR20210009943A (en) * | 2019-07-18 | 2021-01-27 | 김회철 | A mask for preventing yellow dust that improves air resistance on the face |
| CN115814949A (en) * | 2021-09-16 | 2023-03-21 | 中国石油化工股份有限公司 | Gas dust removal device and scale deposit subassembly thereof |
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2024
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230706A (en) * | 2013-04-27 | 2013-08-07 | 中材科技股份有限公司 | Replaceable film filter core for PM2.5 purifying mouth mask and preparation method of filter core |
| CN207905965U (en) * | 2018-03-09 | 2018-09-25 | 周天娇 | New air filter |
| KR20210009943A (en) * | 2019-07-18 | 2021-01-27 | 김회철 | A mask for preventing yellow dust that improves air resistance on the face |
| CN115814949A (en) * | 2021-09-16 | 2023-03-21 | 中国石油化工股份有限公司 | Gas dust removal device and scale deposit subassembly thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119034126A (en) * | 2024-09-23 | 2024-11-29 | 中国安全生产科学研究院 | Step filtering dustproof mask |
| WO2026060913A1 (en) * | 2024-09-23 | 2026-03-26 | 中国安全生产科学研究院 | Stepped filter dust mask |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117695547B (en) | 2026-03-24 |
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