CN113340787B - Breathing mask performance testing device - Google Patents
Breathing mask performance testing device Download PDFInfo
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- CN113340787B CN113340787B CN202110645143.8A CN202110645143A CN113340787B CN 113340787 B CN113340787 B CN 113340787B CN 202110645143 A CN202110645143 A CN 202110645143A CN 113340787 B CN113340787 B CN 113340787B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
Abstract
The invention discloses a respiratory mask performance testing device which comprises a laboratory table, a testing box, a smoke discharging mechanism, a respiratory simulation mechanism, a mask frame and a first smoke analyzer. The invention can solve the following problems when the existing equipment is used for testing the performance of the breathing mask: the variable that first, current equipment tested when carrying out performance test to respirator is less for the test result is reliable enough and rigorous, and second, because the variable of test is less, make test function comparatively single, need use many equipment to test, improved the test cost, and third, current equipment operation is comparatively complicated, and inconvenient tester uses. The invention greatly increases the reliability and the rigidness of the test by increasing a plurality of variables of the mask test by the equipment, can carry out a plurality of tests by using one equipment to reduce the equipment cost, and has simple use and more convenient and reliable operation.
Description
Technical Field
The invention relates to the technical field of performance testing, in particular to a device for testing the performance of a breathing mask.
Background
The common mask of the breathing mask mainly takes a gas mask for preventing harmful substances such as toxic gas and the like as a personal protection device, and is used for providing effective protection for respiratory organs, eyes and facial skin of people. The mask is an important component of a gas mask and is a component that isolates the face of a person from the outside contaminated air. The gas mask consists of a face mask, a gas-guide tube and a canister, and the face mask can be directly connected with the canister for use or connected with the canister for use by the gas-guide tube. The gas mask can be applied to chemical industry, warehouses, scientific research and various toxic and harmful operating environments by respectively selecting various types of gas canisters according to protection requirements, and after the production of the gas mask is finished, the gas mask needs to be subjected to sampling performance test.
However, the existing device has the following problems when the performance of the breathing mask is tested: firstly, the existing equipment has less testing variables when testing the performance of the breathing mask, so that the testing result is not reliable and rigorous; secondly, because the testing variables are few, the testing function is single, multiple devices are needed for testing, and the testing cost is increased; thirdly, the operation of the existing equipment is complex, and the use by testers is inconvenient.
Disclosure of Invention
In order to solve the above problems, the present invention provides a device for testing the performance of a respiratory mask, which can solve the problems mentioned in the background art.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: a respiratory mask performance testing device comprises an experiment table, a testing box, a smoke discharging mechanism, a respiratory simulation mechanism, a mask frame and a first smoke analyzer, wherein the testing box is arranged at the upper end of the experiment table; wherein:
the respiration simulation mechanism comprises a respiration cylinder, a reciprocating piston, a sealing ring, a reciprocating drive branched chain, a first connecting pipe, a first check valve and a second check valve, the respiration cylinder is of a barrel-shaped structure with an opening at the upper end, the respiration cylinder is arranged on a test table on the left side of the test box, the reciprocating piston is arranged on the lower side in the respiration cylinder in a sliding manner, a plurality of sealing rings are embedded in the outer wall of the reciprocating piston, the reciprocating drive branched chain is arranged on the upper side of the respiration cylinder, the first connecting pipe penetrating through the test table is arranged at the lower end of the respiration cylinder, the connecting pipe is communicated with the interior of the respiration cylinder, the first check valve and the second check valve are sequentially arranged on the lower side of the first connecting pipe, and one end of the second check valve is communicated with the exterior;
the mask frame comprises a mounting frame, a T-shaped groove, a sliding plate, positioning branch chains, a face model, a first connecting through hole, a second connecting through hole and a second connecting pipe, the mounting frame is arranged at the lower end in the test box, the T-shaped groove is formed in the upper end of the mounting frame, the sliding plate is I-shaped and is in sliding fit with the T-shaped groove, the positioning branch chains are arranged on the left side and the right side of the T-shaped groove, the face model is arranged at the upper end of the sliding plate, the first connecting through hole which enables the nostril of the face model to be communicated with the lower end of the sliding plate is formed in the face model and the sliding plate, the second connecting through hole which is matched with the first connecting hole in position is formed in the T-shaped groove, the second connecting through hole is communicated with the lower end face of the experiment table, and the second connecting pipe is arranged at the lower end of the second connecting through hole;
the laboratory bench lower extreme is provided with the seal box, is provided with No. two flue gas analysis appearance in the seal box, and a connecting pipe and No. two connecting pipes are connected respectively in the left and right sides of seal box, UNICOM in check valve and the seal box.
As a preferred technical scheme of the invention, the test box is a hollow box body, the front end of the test box is provided with an opening communicated with the inside, the left side of the opening is hinged with a sealing door, the periphery of the inner side wall of the sealing door is embedded with a rubber sealing gasket, and the test box on the upper side and the lower side of the sealing door is provided with a locking branched chain.
As a preferred technical scheme, the locking branched chain comprises a first sliding groove, a second sliding groove, a sliding block, a first jacking spring and a locking block, the first sliding groove is formed in the front end of the test box on the upper side and the lower side of the sealing door, the second sliding groove is formed in the rear end of the first sliding groove, the first jacking spring is arranged at one end, away from the second sliding groove, of the two second sliding grooves, the sliding block is connected to one end, close to the first jacking spring, of the first jacking spring, the sliding block is in sliding fit in the second sliding groove, the locking block is arranged on the front end face, close to the sliding block, of the side, the locking block is in sliding fit with the first sliding groove, the locking block is in an L shape, and one end, close to the locking block, of the locking block is provided with an inclined guide face.
As a preferred technical scheme of the invention, the smoke discharging mechanism comprises a smoke discharging pipe, guide plates, a rotating motor and turbulence rods, the smoke discharging pipe communicated with the inside of the test box is arranged at the right end of the test box, the guide plates are arranged on the inner wall of one side of the test box close to the smoke discharging pipe and are arranged in a divergent mode, the rotating motor is arranged on the inner wall of the test box at the left side of each guide plate through a motor frame, and the turbulence rods are uniformly arranged on an output shaft of the rotating motor along the circumferential direction of the output shaft.
As a preferred technical scheme of the invention, the left end of the test box is provided with a smoke discharge pipe communicated with the interior of the test box, and the left end of the smoke discharge pipe is connected with an air filter.
As a preferred technical scheme of the invention, the reciprocating drive branched chain comprises a drive motor, a rotating disk, an adjusting groove, an adjusting screw, a rotating shaft, an inner hexagonal screwing block, an adjusting block and a connecting rod, wherein the drive motor is arranged on the upper side of the outer wall of the breathing cylinder through a motor base, an output shaft of the drive motor enters the breathing cylinder and is provided with the rotating disk, the adjusting groove is formed in the front end of the rotating disk, the adjusting screw is rotatably arranged in the adjusting groove, the rotating shaft is rotatably connected to the outer wall of the rotating disk, one end of the rotating shaft in the rotating disk is connected with the adjusting screw, the inner hexagonal screwing block is arranged at one end of the rotating shaft outside the rotating disk, the adjusting block is screwed on the outer wall of the adjusting screw, one end of the connecting rod is rotatably connected to the front end of the adjusting block, and the other end of the connecting rod is hinged to the upper end of the reciprocating piston.
According to a preferred technical scheme, the positioning branched chain comprises a telescopic groove, a second jacking spring, a positioning pin and a positioning groove, the telescopic groove is formed in the upper ends of the left side and the right side of the inside of the T-shaped groove, the positioning pin is arranged in the telescopic groove in a sliding mode through the second jacking spring, the lower end of the positioning pin is circular, and the upper ends of two wings on the lower side of the sliding plate are provided with the positioning grooves matched with the lower ends of the positioning pin.
As a preferred technical scheme of the invention, the heat insulation plate is embedded in the inner wall of the test box, so that the influence of the external temperature on the environment in the test box is prevented.
The invention has the beneficial effects that:
1. the invention can solve the following problems when the existing equipment is used for testing the performance of the breathing mask: the variable that first, current equipment tested when carrying out performance test to respirator is less for the test result is reliable enough and rigorous, and second, because the variable of test is less, make test function comparatively single, need use many equipment to test, improved the test cost, and third, current equipment operation is comparatively complicated, and inconvenient tester uses. The invention greatly increases the reliability and the rigidness of the test by increasing a plurality of variables of the mask test by the equipment, can carry out a plurality of tests by using one equipment to reduce the equipment cost, and has simple use and more convenient and reliable operation.
2. The reciprocating driving branched chain can use a hexagonal wrench to screw the inner hexagonal screwing block from the upper end of the breathing cylinder, the inner hexagonal screwing block drives the rotating shaft to rotate, the rotating shaft drives the adjusting screw to rotate, the adjusting screw drives the adjusting block to slide in the adjusting groove through threads, when the adjusting block is gradually far away from the center of the rotating disc, the adjusting block drives the connecting rod to enable the reciprocating piston to reciprocate up and down, the distance between the reciprocating piston and the adjusting groove is gradually increased, a test variable can be changed according to the change of the breathing capacity of the breathing simulation mechanism, and the reliability and the rigor of detection are further increased.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of a first configuration of the present invention;
FIG. 2 is a second schematic structural view of the present invention;
FIG. 3 is a front cross-sectional view of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 according to the present invention;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4 in accordance with the present invention;
FIG. 6 is an enlarged view of a portion of the invention at C of FIG. 3;
FIG. 7 is a cross-sectional view of the present invention between the opening of the test chamber, the sealing door, the rubber gasket, and the locking arm;
FIG. 8 is an enlarged view of a portion of the invention at D of FIG. 7;
fig. 9 is a schematic structural view of the hexagonal socket head of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Referring to 1-9, the respiratory mask performance testing device comprises an experiment table 1, a testing box 2, a smoke discharging mechanism 3, a respiratory simulation mechanism 4, a mask frame 5 and a smoke analyzer 6, wherein the testing box 2 is arranged at the upper end of the experiment table 1, the smoke discharging mechanism 3 is arranged at the right side of the testing box 2, the respiratory simulation mechanism 4 is arranged at the left side of the testing box 2, the mask frame 5 is arranged at the lower end in the testing box 2, and the smoke analyzer 6 is arranged at the right side of the mask frame 5; wherein:
the mask frame 5 comprises a mounting frame 51, a T-shaped groove 52, a sliding plate 53, a positioning branch chain 54, a human face model 55, a first connecting through hole 56, a second connecting through hole 57 and a second connecting pipe 58, the mounting frame 51 is arranged at the lower end in the test box 2, the T-shaped groove 52 is formed in the upper end of the mounting frame 51, the sliding plate 53 is I-shaped and is in sliding fit with the T-shaped groove 52, the positioning branch chain 54 is arranged on the left side and the right side of the T-shaped groove 52, the human face model 55 is arranged at the upper end of the sliding plate 53, the first connecting through hole 56 which enables the nostril of the human face model 55 to be communicated with the lower end of the sliding plate 53 is formed in the human face model 55 and the sliding plate 53, the second connecting through hole 57 which is matched with the first connecting through hole 56 is formed in the T-shaped groove 52, the second connecting through hole 57 is communicated with the lower end face of the experiment table 1, and the second connecting pipe 58 is arranged at the lower end of the second connecting through hole 57;
when the breathing mask is worn on the face of the human face model 55 during specific work, the breathing mask is tightly attached to the human face model 55, the lower side of the sliding plate 53 is correspondingly inserted into the T-shaped groove 52 and pushed to the rear side, and when the first connecting through hole 56 and the second connecting through hole 57 correspond in position, the sliding plate 53 is positioned through the positioning branched chain 54; the human face models 55 with different facial features can be replaced, so that the testing variables are increased, the reliability and the rigor of the experiment are improved, and the human face models 55 can be replaced conveniently and quickly.
The positioning branched chain 54 comprises an expansion groove 541, a second top extension spring 542, a positioning pin 543 and a positioning groove 544, wherein the expansion groove 541 is formed in the upper ends of the left side and the right side of the inside of the T-shaped groove 52, the positioning pin 543 is slidably arranged in the expansion groove 541 through the second top extension spring 542, the lower end of the positioning pin 543 is circular, and the upper ends of two wings on the lower side of the sliding plate 53 are provided with the positioning groove 544 matched with the lower end of the positioning pin 543;
when the positioning device works specifically, when positioning is needed, the lower side of the sliding plate 53 is correspondingly inserted into the T-shaped groove 52 and is gradually pushed towards the rear side, the round structure of the lower ends of the positioning pins 543 is pushed by two wings at the lower side of the sliding plate 53, so that the positioning pins 543 are pushed into the telescopic groove 541, the second pushing spring 542 is compressed, the sliding plate 53 is pushed towards the rear, when the sliding plate 53 slides to a certain position in the T-shaped groove 52, the positioning pins 543 are correspondingly matched with the positioning grooves 544, the positioning pins 543 are pushed downwards by the second pushing spring 542, so that the lower ends of the positioning pins 543 extend out to be matched with the positioning grooves 544, and the sliding plate 53 is stopped being pushed; when the sliding plate 53 needs to be taken down, the sliding plate 53 is pulled forwards with force, so that the edge of the positioning groove 544 pushes the circular structure at the lower end of the positioning pin 543, so that the positioning pin 543 is pushed into the telescopic groove 541, the positioning of the sliding plate 53 is cancelled, and the sliding plate 53 is pulled forwards so that the sliding plate 53 exits from the T-shaped groove 52; the positioning branches 54 described above serve primarily to quickly determine the correct position.
The testing box 2 is a hollow box body, the front end of the testing box 2 is provided with an opening 21 communicated with the inside, the left side of the opening 21 is hinged with a sealing door 22, the periphery of the inner side wall of the sealing door 22 is embedded with a rubber sealing gasket 23, the testing box 2 on the upper side and the lower side of the sealing door 22 is provided with a locking branched chain 24, and the inner wall of the testing box 2 is embedded with a heat insulation plate 27 to prevent the external temperature from influencing the environment in the testing box 2;
the locking branched chain 24 comprises a first sliding groove 241, a second sliding groove 242, a sliding block 243, a first pushing spring 244 and a locking block 245, the front end of the test box 2 on the upper side and the lower side of the sealing door 22 is provided with the first sliding groove 241, the rear end of the first sliding groove 241 is provided with the second sliding groove 242, one end, away from each other, of the two second sliding grooves 242 is provided with the first pushing spring 244, one end, close to the first pushing spring 244, of the first pushing spring is connected with the sliding block 243, the sliding block 243 is in sliding fit in the second sliding groove 242, the locking block 245 is arranged on the front end face of one side, close to the sliding block 243, of the locking block 245 is in sliding fit with the first sliding groove 241, the locking block 245 is in an L shape, and one end, close to the locking block 245, of the locking block is provided with an inclined guide face;
when the sealing door 22 is closed, the edge of the sealing door 22 presses against the guide surface on the locking block 245 when the sealing door 22 is closed, so that the locking block 245 drives the sliding block 243 to slide towards one end of the second sliding groove 242 away from the opening 21, the first push-extension spring 244 is compressed, when the sealing door 22 is tightly attached to the opening 21, the first push-extension spring 244 pushes the sliding block 243 and drives the locking block 245 to slide towards the direction close to the opening 21, so that the locking block 245 clamps the sealing door 22 by using an L-shaped structure, the sealing door 22 is locked, and the rubber sealing gasket 23 is tightly pressed on the edge of the opening 21 to form a sealing state; when the sealing door 22 is to be opened, the locking block 245 is pulled away from each other, so that the locking block 245 drives the sliding block 243 to slide towards one end of the second sliding groove 242 away from the opening 21, the first ejection spring 244 is compressed, and when the locking block 245 moves to a certain position, the sealing door 22 is unlocked, so that the sealing door 22 is opened, the structure is reliable, and the operation is convenient.
The smoke discharging mechanism 3 comprises a smoke discharging pipe 31, guide plates 32, a rotating motor 33 and turbulence rods 34, the smoke discharging pipe 31 communicated with the inside of the test box 2 is arranged at the right end of the test box 2, the guide plates 32 are arranged on the inner wall of one side, close to the smoke discharging pipe 31, of the test box 2, the guide plates 32 are arranged in a dispersing mode, the rotating motor 33 is arranged on the inner wall of the test box 2 on the left side of each guide plate 32 through a motor frame, and the turbulence rods 34 are evenly arranged on an output shaft of the rotating motor 33 along the circumferential direction of the output shaft;
when the smoke detector works specifically, the right end of the smoke discharging pipe 31 is connected to smoke generating equipment outside, smoke contains harmful substances to be tested, the smoke enters the testing box 2 through the smoke discharging pipe 31 and then is divided by the guide plate 32 and flows to the left side, so that the aim of uniformly distributing the smoke on the upper side and the lower side in the testing box 2 is fulfilled, the rotating motor 33 works, the output shaft of the rotating motor 33 rotates to drive the turbulence rods 34 to rotate, when the smoke flows to the turbulence rods 34, the turbulence rods 34 stir and disturb the smoke, the smoke can be uniformly distributed when reaching the human face model 55, the reliability and the rigidness of the test are improved, and meanwhile, when the harmful substances in the testing box 2 shown by the smoke analyzer 6 reach a certain amount, the smoke feeding is stopped; the test variable is changed by changing the smoke concentration in the test box 2, so that the reliability and the rigor of the test are further improved.
The left end of the test box 2 is provided with a smoke discharge pipe 25 communicated with the interior of the test box, and the left end of the smoke discharge pipe 25 is connected with an air filter 26;
during specific work, because the difficult income of airtight flue gas of test box 2, the flue gas can be gradually with the inside air of test box 2 through flue gas discharge pipe 25 discharge when getting into test box 2 gradually, and the flue gas can be followed and discharged through flue gas discharge pipe 25 when reaching certain concentration simultaneously, filters harmful substance in a large number when air cleaner 26, effectively prevents the polluted air.
The respiratory simulation mechanism 4 comprises a respiratory cylinder 41, a reciprocating piston 42, a sealing ring 43, a reciprocating driving branched chain 44, a first connecting pipe 45, a first check valve 46 and a second check valve 47, the respiratory cylinder 41 is of a barrel-shaped structure with an upper end opening 21, the respiratory cylinder 41 is arranged on a laboratory table 1 on the left side of a test box 2, the reciprocating piston 42 is arranged on the lower side in the respiratory cylinder 41 in a sliding mode, the sealing rings 43 are embedded in the outer wall of the reciprocating piston 42, the reciprocating driving branched chain 44 is arranged on the upper side of the respiratory cylinder 41, the first connecting pipe 45 penetrating through the laboratory table 1 is arranged at the lower end of the respiratory cylinder 41 and communicated with the interior of the respiratory cylinder 41, the first check valve 46 and the second check valve 47 are sequentially arranged on the lower side of the first connecting pipe 45, and one end of the second check valve 47 is communicated with the outside;
a sealing box 11 is arranged at the lower end of the experiment table 1, a second flue gas analyzer 12 is arranged in the sealing box 11, a first connecting pipe 45 and a second connecting pipe 58 are respectively connected to the left side and the right side of the sealing box 11, and a first check valve 46 is communicated with the inside of the sealing box 11;
when the reciprocating piston 42 descends, the filtered smoke enters the lower side of the breathing tube 41 through the first connecting hole 56, the second connecting hole 57 and the second connecting pipe 58, the second check valve 47 is sealed in a one-way mode, the second smoke analyzer 12 detects the content of harmful substances in the filtered smoke, the front data and the rear data of the first smoke analyzer 6 and the second smoke analyzer 12 are compared to obtain the filtering performance of the breathing mask under different smoke concentrations, the filtered smoke enters the lower side of the breathing tube 41 through the first connecting pipe 45 and the first check valve 46, when the reciprocating piston 42 descends, the first check valve 46 is sealed in a one-way mode when the filtered smoke passes through the first connecting pipe 45, and the filtered smoke is discharged through the second check valve 47, in the test process, because the smoke in the test box 2 is consumed, the smoke is continuously supplied by external smoke generating equipment to keep the concentration of the smoke in the test box 2 stable and balanced; when keeping the smoke concentration in the test box 2 unchanged during detection, long-time durability test is carried out, the change of data shown by the second smoke analyzer 12 is observed and recorded, the test is stopped when the shown numerical value does not accord with the using effect of the breathing mask, and the service life of the breathing mask can be obtained.
The reciprocating driving branched chain 44 comprises a driving motor 441, a rotating disc 442, an adjusting groove 443, an adjusting screw rod 444, a rotating shaft 445, an inner hexagonal screwing block 446, an adjusting block 447 and a connecting rod 448, the driving motor 441 is arranged on the upper side of the outer wall of the breathing cylinder 41 through a motor base, the output shaft of the driving motor 441 enters the breathing cylinder 41 and is provided with the rotating disc 442, the front end of the rotating disc 442 is provided with the adjusting groove 443, the adjusting groove 443 is rotatably provided with the adjusting screw rod 444, the rotating shaft 445 is rotatably connected to the outer wall of the rotating disc 442, one end of the rotating shaft 445 in the rotating disc 442 is connected with the adjusting screw rod 444, one end of the rotating shaft 445 outside the rotating disc 442 is provided with the inner hexagonal screwing block 446, the outer wall of the adjusting screw rod 444 is in threaded connection with the adjusting block 447, one end of the connecting rod 448 is rotatably connected to the front end of the adjusting block 447, and the other end of the connecting rod 448 is hinged to the upper end of the reciprocating piston 42;
when the reciprocating piston 42 works, the driving motor 441 works, the output shaft of the driving motor 441 rotates to drive the rotating disc 442 to rotate, the rotating disc 442 drives the adjusting block 447 to rotate around the center of the rotating disc 442, and the adjusting block 447 drives the connecting rod 448 to enable the reciprocating piston 42 to reciprocate up and down; an inner hexagonal screwing block 446 is screwed from the upper end of the breathing cylinder 41 by using a hexagonal wrench, the inner hexagonal screwing block 446 drives the rotating shaft 445 to rotate, the rotating shaft 445 drives the adjusting screw rod 444 to rotate, the adjusting screw rod 444 drives the adjusting block 447 to slide in the adjusting groove 443 through threads, when the adjusting block 447 is gradually far away from the center of the rotating disc 442, the adjusting block 447 drives the connecting rod 448 to enable the reciprocating piston 42 to reciprocate up and down, the distance is gradually increased, the test variable can be changed according to the breathing amount of the breathing simulation mechanism 4, and the reliability and the rigor of the detection are further increased.
When in work:
the first step is as follows: the breathing mask is worn on the face of the human face model 55, so that the breathing mask is tightly attached to the human face model 55, the lower side of the sliding plate 53 is correspondingly inserted into the T-shaped groove 52 and pushed to the rear side, and when the first connecting through hole 56 corresponds to the second connecting through hole 57, the sliding plate 53 is positioned through the positioning branched chain 54;
the second step is that: when the sealing door 22 is closed, the edge of the sealing door 22 presses against the guide surface on the locking block 245, so that the locking block 245 drives the sliding block 243 to slide towards one end of the second sliding groove 242 away from the opening 21, the first push-extension spring 244 is compressed, when the sealing door 22 is tightly attached to the opening 21, the first push-extension spring 244 pushes the sliding block 243 and drives the locking block 245 to slide towards the direction close to the opening 21, so that the locking block 245 locks the sealing door 22 by using an L-shaped structure, the sealing door 22 is locked, and the rubber gasket 23 is tightly pressed on the edge of the opening 21 to form a sealing state;
the third step: the right end of a smoke discharge pipe 31 is connected to smoke generation equipment outside, the smoke contains harmful substances to be tested, the smoke enters a test box 2 through the smoke discharge pipe 31 and then is divided by a guide plate 32 and flows to the left side, so that the aim of uniformly distributing the smoke on the upper side and the lower side in the test box 2 is fulfilled, a rotating motor 33 works, an output shaft of the rotating motor 33 rotates to drive a turbulence rod 34 to rotate, when the smoke flows to the turbulence rod 34, the turbulence rod 34 agitates the smoke, the smoke can be uniformly distributed when reaching a human face model 55, and meanwhile, when the harmful substances in the test box 2 shown by a smoke analyzer 6 reach a certain amount, the smoke supply is stopped;
the fourth step: the reciprocating drive branched chain 44 drives the reciprocating piston 42 to reciprocate up and down, when the reciprocating piston 42 rises, gas is sucked from the lower side of the breathing tube 41, due to pressure difference, the gas passes through the breathing mask, the gas is filtered by the breathing mask and then enters the sealing box 11 through the first connecting hole 56, the second connecting hole 57 and the second connecting pipe 58, the second check valve 47 is sealed in a one-way mode, the second flue gas analyzer 12 detects the content of harmful substances in the sucked and filtered gas, the front data and the rear data of the first flue gas analyzer 6 and the second flue gas analyzer 12 are compared to obtain the filtering performance of the breathing mask under different gas concentrations, the filtered gas then enters the lower side of the breathing tube 41 through the first connecting pipe 45 and the first check valve 46, when the reciprocating piston 42 descends, the filtered gas passes through the first connecting pipe 45, the first check valve 46 is sealed in a one-way, so that the filtered gas is discharged through the second check valve 47, in the test process, because the smoke in the test box 2 is consumed, the smoke is continuously supplied by external smoke generating equipment to keep the concentration of the smoke in the test box 2 stable and balanced; when keeping the smoke concentration in the test box 2 unchanged during detection, long-time durability test is carried out, the change of data shown by the second smoke analyzer 12 is observed and recorded, the test is stopped when the shown numerical value does not accord with the using effect of the breathing mask, and the service life of the breathing mask can be obtained.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a respiratory mask capability test device, includes laboratory bench (1), test box (2), flue gas discharge mechanism (3), breathing simulation mechanism (4), face guard frame (5) and a flue gas analyzer (6), its characterized in that: the testing box (2) is arranged at the upper end of the experiment table (1), the smoke discharging mechanism (3) is arranged at the right side of the testing box (2), the breathing simulation mechanism (4) is arranged at the left side of the testing box (2), the mask frame (5) is arranged at the lower end in the testing box (2), the first smoke analyzer (6) is arranged at the right side of the mask frame (5), and the second smoke analyzer (12) is arranged at the lower end of the experiment table (1); wherein:
breathe analog mechanism (4) including breathing a section of thick bamboo (41), reciprocating piston (42), sealing washer (43), reciprocating drive branched chain (44), connecting pipe (45), check valve (46) and No. two check valves (47), breathe a section of thick bamboo (41) and be the tubbiness structure of upper end opening (21), and breathe a section of thick bamboo (41) and set up on left laboratory bench (1) of test box (2), the downside in breathing a section of thick bamboo (41) slides and is provided with reciprocating piston (42), reciprocating piston (42) outer wall inlays and is equipped with a plurality of sealing washers (43), reciprocating drive branched chain (44) set up the upside in breathing a section of thick bamboo (41), breathe a section of thick bamboo (41) lower extreme and be provided with connecting pipe (45) of passing laboratory bench (1), and connecting pipe and breathing a section of thick bamboo (41) interior UNICOM, a connecting pipe (45) downside has set gradually check valve (46) and No. two check valves (47), one end of the second check valve (47) is communicated with the outside;
the mask frame (5) comprises a mounting frame (51), a T-shaped groove (52), a sliding plate (53), positioning branch chains (54), a face model (55), a first connecting through hole (56), a second connecting through hole (57) and a second connecting pipe (58), the mounting frame (51) is arranged at the lower end in the test box (2), the T-shaped groove (52) is formed in the upper end of the mounting frame (51), the sliding plate (53) is I-shaped and is in sliding fit with the T-shaped groove (52), the positioning branch chains (54) are arranged on the left side and the right side of the T-shaped groove (52), the face model (55) is arranged at the upper end of the sliding plate (53), the first connecting through hole (56) enabling the nostril of the face model (55) to be communicated with the lower end of the sliding plate (53) is formed in the face model (55) and the sliding plate (53), the second connecting through hole (57) matched with the first connecting through hole (56) is formed in the T-shaped groove (52), the second connecting through hole (57) is communicated with the lower end face of the experiment table (1), and a second connecting pipe (58) is arranged at the lower end of the second connecting through hole (57);
a sealing box (11) is arranged at the lower end of the experiment table (1), a second flue gas analyzer (12) is arranged in the sealing box (11), a first connecting pipe (45) and a second connecting pipe (58) are respectively connected to the left side and the right side of the sealing box (11), and a first check valve (46) is communicated with the inside of the sealing box (11);
the smoke discharging mechanism (3) comprises a smoke discharging pipe (31), guide plates (32), a rotating motor (33) and turbulence rods (34), the smoke discharging pipe (31) communicated with the inside of the test box (2) is arranged at the right end of the test box (2), the guide plates (32) are arranged on the inner wall of one side, close to the smoke discharging pipe (31), of the test box (2), the guide plates (32) are arranged in a dispersing manner, the rotating motor (33) is arranged on the inner wall of the test box (2) on the left side of the guide plates (32) through a motor frame, and the turbulence rods (34) are uniformly arranged on an output shaft of the rotating motor (33) along the circumferential direction of the output shaft;
the reciprocating driving branched chain (44) comprises a driving motor (441), a rotating disc (442), an adjusting groove (443), an adjusting screw rod (444), a rotating shaft (445), an inner hexagonal screwing block (446), an adjusting block (447) and a connecting rod (448), the driving motor (441) is arranged on the upper side of the outer wall of the breathing tube (41) through a motor base, an output shaft of the driving motor (441) enters the breathing tube (41) and is provided with the rotating disc (442), the front end of the rotating disc (442) is provided with the adjusting groove (443), the adjusting screw rod (444) is rotationally arranged in the adjusting groove (443), the rotating shaft (445) is rotationally connected to the outer wall of the rotating disc (442), one end of the rotating shaft (445) in the rotating disc (442) is connected with the adjusting screw rod (444), one end of the rotating shaft (445) outside the rotating disc (442) is provided with the inner hexagonal screwing block (446), and the outer wall of the adjusting screw rod (444) is screwed with the adjusting block (447), one end of the connecting rod (448) is rotatably connected with the front end of the adjusting block (447), and the other end of the connecting rod (448) is hinged at the upper end of the reciprocating piston (42).
2. A respiratory mask performance testing device according to claim 1, wherein: the test box (2) is a hollow box body, the front end of the test box (2) is provided with an opening (21) communicated with the inside, the left side of the opening (21) is hinged with a sealing door (22), a rubber sealing gasket (23) is embedded around the inner side wall of the sealing door (22), and locking branched chains (24) are arranged on the test box (2) on the upper side and the lower side of the sealing door (22).
3. A respiratory mask performance testing device according to claim 2, wherein: locking branch chain (24) include spout (241), No. two spout (242), slider (243), top and stretch spring (244) and latch segment (245), test box (2) front end of both sides has seted up spout (241) about sealing door (22), spout (242) have been seted up No. two to spout (241) rear end, the one end of keeping away from each other of two spout (242) is provided with top and stretches spring (244) No. one, the one end that spring (244) are stretched in top and are close to each other is connected with slider (243), slider (243) sliding fit is in No. two spout (242), latch segment (245) set up the terminal surface before the one side that slider (243) are close to each other, and latch segment (245) and spout (241) sliding fit, latch segment (245) are L shape, the one end that latch segment (245) are close to each other is equipped with the spigot surface of slope.
4. A respiratory mask performance testing device according to claim 1, wherein: the left end of the test box (2) is provided with a smoke discharge pipe (25) communicated with the interior of the test box, and the left end of the smoke discharge pipe (25) is connected with an air filter (26).
5. A respiratory mask performance testing device according to claim 1, wherein: the positioning branched chain (54) comprises an expansion groove (541), a second top extension spring (542), a positioning pin (543) and a positioning groove (544), wherein the expansion groove (541) is formed in the upper ends of the left side and the right side of the inside of the T-shaped groove (52), the positioning pin (543) is arranged in the expansion groove (541) in a sliding mode through the second top extension spring (542), the lower end of the positioning pin (543) is circular, and the positioning groove (544) matched with the lower end of the positioning pin (543) is formed in the upper ends of two wings on the lower side of the sliding plate (53).
6. A respiratory mask performance testing device according to claim 1, wherein: and a heat insulation plate (27) is embedded in the inner wall of the test box (2).
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| CN117419945B (en) * | 2023-12-19 | 2024-03-12 | 四川烈火胜服科技有限公司 | Closed circulation type respirator performance detection device |
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| CN209167076U (en) * | 2018-12-12 | 2019-07-26 | 南华大学 | Radon gas type of respiration armour performance detecting platform |
| CN212308804U (en) * | 2020-04-01 | 2021-01-08 | 廖丹 | Breathe internal medicine vital capacity training instrument |
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| US8011380B2 (en) * | 2009-10-01 | 2011-09-06 | Vision Tech International Llp | Single component two-stage regulator |
| CN210090236U (en) * | 2019-05-31 | 2020-02-18 | 温州际高检测仪器有限公司 | Breath resistance tester |
| CN210604328U (en) * | 2019-06-14 | 2020-05-22 | 柴诺未(天津)文化传播有限公司 | Be used for shockproof testing arrangement of motion brassiere |
| CN211426504U (en) * | 2020-01-03 | 2020-09-04 | 新疆中测测试有限责任公司 | Portable positive pressure type air respirator detector |
| CN112304850A (en) * | 2020-11-23 | 2021-02-02 | 中国矿业大学 | Self-absorption filter type protective mask comprehensive performance test experimental device and method |
| CN112588543A (en) * | 2020-12-04 | 2021-04-02 | 付小豪 | Spraying process for decorative aluminum plate of building curtain wall |
| CN112719463A (en) * | 2020-12-25 | 2021-04-30 | 孙坤坤 | Manufacturing and processing technology of transmission gear of speed reducer |
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| CN209167076U (en) * | 2018-12-12 | 2019-07-26 | 南华大学 | Radon gas type of respiration armour performance detecting platform |
| CN212308804U (en) * | 2020-04-01 | 2021-01-08 | 廖丹 | Breathe internal medicine vital capacity training instrument |
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