Device for evaluating protective performance of mask

Abstract

The utility model relates to the technical field of breathing simulation of medical masks, in particular to a device for evaluating the protective performance of a mask, which comprises a support frame, a connecting seat is welded above the support frame, a peristaltic pump is arranged on one side of the connecting seat, and a dust collecting cup is arranged on one side of the peristaltic pump; a discharging pipe and a feeding pipe are inserted into one side of the peristaltic pump, the feeding pipe is arranged below the discharging pipe, a clamping groove is connected to the lower portion of the peristaltic pump in a glued mode, and an inserting plate is clamped to a hole groove in one side of the clamping groove. The mask can be conveniently and accurately fixed, meanwhile, the simulation device can simulate whether the mask can filter when a user wears the mask to breathe so as to judge whether the protection capacity of the mask meets the specific standard and requirement, and meanwhile, a plurality of disassembly structures are arranged, so that the suction cup assembly is convenient to disassemble, replace and clean, and the dust collection cup is convenient to disassemble and clean.

Description

Technical Field

[0001] The utility model relates to the technical field of medical mask breathing simulation, in particular to a device for evaluating the protection performance of masks. Background Technique

[0002] The air contains a large number of fine particles, and its impact on human health is related to its properties, inhalation amount and particle size. Generally speaking, particles with a size greater than 10μm in the air will basically be blocked by the human nasal cavity; about 90% of the particles between 2μm and 10μm may enter the respiratory tract, and 10% may reach the lungs; while particles smaller than 2μm will be inhaled into the lungs by our respiratory system, and among them, particles with a size of 0.3 - 2μm will be deposited in the lungs, causing serious impacts and harms to the human body.

[0003] The inventor found the following problems in the process of implementing the present utility model in the prior art: 1. It is impossible to accurately evaluate the protection performance of masks, which may lead to the masks used being unable to effectively block harmful particles in actual applications, increasing the risk of users being exposed to pollution or pathogens; 2. Since masks are relatively light, if fixed limit devices are used, the masks will shift during the simulation test, resulting in the simulation structure being affected and the accuracy of the simulation results cannot be accurately ensured. Content of the Utility Model

[0004] The purpose of the present utility model is to provide a device for evaluating the protection performance of masks to solve the problem that there is no limit fixing component during the detection of masks in the above-mentioned background technique, which may cause the masks to shift during simulation and lead to inaccurate simulation results. To achieve the above purpose, the present utility model provides the following technical solution: A device for evaluating the protection performance of masks, including a support frame, a connecting seat is welded above the support frame, a peristaltic pump is arranged on one side of the connecting seat, and a dust collection cup is arranged on one side of the peristaltic pump;

[0005] One side of the peristaltic pump is respectively inserted with a discharge pipe and a feed pipe, the feed pipe is arranged below the discharge pipe, a clamping groove is glued below the peristaltic pump, a plug board is clamped in the hole groove on one side of the clamping groove, a support seat is glued below the plug board, and a special suction cup is arranged below the support seat.

[0006] Further preferably, a support plate is welded on one side of the connecting seat, a sliding rod is welded above the support plate, a sliding sleeve is attached to the outer wall of the sliding rod, a pushing plate is welded above the sliding sleeve, a cylinder is installed above the pushing plate, and the pushing plate and the sliding sleeve form a sliding structure through the cylinder.

[0007] Further preferably, the outer wall of the dust cup is provided with a transparent observation window, a threaded sleeve is welded at the bottom of the dust cup, an upper cover is fitted on the top of the dust cup, and the upper inner ring diameter of the dust cup is consistent with the lower outer ring diameter of the upper cover, and a vertical rectangular transparent observation window is provided on the outer wall of the dust cup, and the external structural dimensions of the single-threaded screw above the support seat are consistent with the internal structural dimensions of the slot.

[0008] Further preferably, a rectangular hole is opened inside the card slot, the plug plate is an "n"-shaped plate, and the internal structural dimensions of the card slot are consistent with the dimensions of the upper rectangular plate of the plug plate, and the lower plate is glued to the top of the support seat.

[0009] Further preferably, a fixing plate is connected to the top of the support frame by a hinge, a limiting rod is welded to the bottom of the fixing plate, a first magnetic sheet and a second magnetic sheet are glued to the bottom of the fixing plate, the first magnetic sheet and the second magnetic sheet are respectively located on both sides of the limiting rod, a fixing seat is installed on one side of the support frame by screws, a limiting hole is provided at the inner center position of the fixing seat, a first suction sheet groove and a second suction sheet groove are respectively provided inside the fixing seat, the first suction sheet groove and the second suction sheet groove are respectively located on both sides of the limiting hole, and the external structural size of the limiting rod is consistent with the internal hole size of the limiting hole.

[0010] Further preferably, the external structural dimensions of the first magnetic attraction sheet are consistent with the internal structural dimensions of the first attraction sheet groove, and the external structural dimensions of the second magnetic attraction sheet are consistent with the internal structural dimensions of the second attraction sheet groove.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] In the utility model, a suction cup is used to suck dust or tiny particles below through the mask to simulate the situation of a person wearing a mask and breathing in a normal environment, which is helpful to evaluate the filtering performance of the mask. By simulating the airflow and particle movement during human breathing, the blocking effect of the mask on particles of various sizes under different conditions can be accurately understood, thereby judging whether its protective ability meets specific standards and requirements.

[0013] In the utility model, a clamping fixation is provided through the mask fixing device, and a limit rod and two magnetic suction plates are provided on one side of the fixing plate for fixing. The mask can be quickly fixed, the difficulty of fixed installation is reduced, and the installation time of the simulation experiment is conveniently saved. The middle part of the support frame adopts a hollow design, which is convenient for placing tiny particles that need to be simulated below for testing, which is convenient for testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0015] Figure 2 This is a schematic side view structure diagram of the utility model;

[0016] Figure 3 This is a schematic structure diagram above the support frame of the utility model;

[0017] Figure 4 This is a schematic structure diagram of one side of the connecting seat of the utility model;

[0018] Figure 5 This is a schematic structure diagram of the outer wall of the dust collection cup of the utility model;

[0019] Figure 6 This is a schematic structure diagram of one side of the peristaltic pump of the utility model.

[0020] In the figure: 1. Support frame; 101. Fixed plate; 102. Second magnetic sheet; 103. Limit rod; 104. First magnetic sheet; 105. First magnetic sheet groove; 106. Limit hole; 107. Second magnetic sheet groove; 108. Fixed seat; 2. Connecting seat; 201. Sliding sleeve; 202. Cylinder; 203. Push plate; 204. Slide bar; 205. Support plate; 3. Dust collection cup; 301. Upper cover; 302. Transparent observation window; 303. Threaded sleeve; 4. Peristaltic pump; 401. Support seat; 402. Special suction cup; 403. Insertion plate; 404. Card slot; 405. Discharge pipe; 406. Feed pipe. Specific implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 to 6 , the present utility model provides a technical solution: a device for evaluating the protection performance of a mask, including a support frame 1, a connecting seat 2 is welded above the support frame 1, a peristaltic pump 4 is provided on one side of the connecting seat 2, and a dust collection cup 3 is provided on one side of the peristaltic pump 4;

[0023] The discharge pipe 405 and the feed pipe 406 are respectively inserted on one side of the peristaltic pump 4, the feed pipe 406 is provided below the discharge pipe 405, a card slot 404 is adhesively connected below the peristaltic pump 4, an insertion plate 403 is clamped in the hole groove on one side of the card slot 404, a support seat 401 is adhesively connected below the insertion plate 403, and a special suction cup 402 is provided below the support seat 401.

[0024] In this embodiment, as Figure 1 , Figure 2 ,Figure 4 and Figure 6 As shown in Figure 6 , a support plate 205 is welded to one side of the connecting seat 2, a sliding rod 204 is welded above the support plate 205, a sliding sleeve 201 is attached to the outer wall of the sliding rod 204, a push plate 203 is welded above the sliding sleeve 201, a cylinder 202 is installed above the push plate 203, and the push plate 203 and the sliding sleeve 201 form a sliding structure through the cylinder 202; the output shaft of the cylinder 202 pushes the push plate 203 fixedly installed by a bolt to move downward, so that the sliding sleeve 201 below the push plate 203 moves on the sliding rod 204. The cylinder 202 is located at the center of the push plate 203 to play a pushing role. The sliding sleeve 201 moves vertically on the sliding rod 204, which can increase the smoothness of the downward movement, facilitate the special suction cup 402 to stably suck the simulated particulate matter below the mask, facilitate the testing of the filtering performance of the mask, and facilitate detection.

[0025] In this embodiment, as Figure 1 、 Figure 2 、 Figure 5 and Figure 6 shown, a transparent observation window 302 is provided on the outer wall of the dust collection cup 3. A threaded sleeve 303 is welded below the dust collection cup 3. An upper cover 301 is attached above the dust collection cup 3. The inner ring diameter of the upper part of the dust collection cup 3 is the same as the outer ring diameter of the lower part of the upper cover 301. And a vertical rectangular transparent observation window 302 is provided on the outer wall of the dust collection cup 3. And the external structure size of the single-threaded screw rod above the support seat 401 is the same as the internal structure size of the card slot 404; the lower part of the dust collection cup 3 is installed on the single-threaded screw rod on the support seat 401 by a threaded sleeve 303, which is convenient for disassembly and installation. The transparent observation window 302 can observe the amount of inhaled particulate matter. The detachable structure is convenient for disassembly, cleaning and weighing, and for detecting the filtering efficiency of masks of different batches for reference and comparison.

[0026] In this embodiment, as Figure 1 、 Figure 2 and Figure 6 shown, a rectangular hole is opened inside the card slot 404. The plug board 403 is in the shape of an "n" - shaped board, and the internal structure size of the card slot 404 is the same as the size of the upper rectangular board of the plug board 403. The lower board is glued to the upper part of the support seat 401; a card slot 404 is provided below the peristaltic pump 4, and a plug board 403 is provided above the support seat 401. The plug board 403 and the card slot 404 are fixed by a snap - fit connection, which is convenient for installation and disassembly. The working principle of the peristaltic pump 4 (model: DP3G16) makes the shear force generated on the transported fine particles smaller, can better maintain the integrity and activity of the particles, reduce the damage and destruction of the particles, can provide accurate and stable flow control, ensure that the amount of fine particles sucked each time is relatively accurate and repeatable, is conducive to quantitative analysis and quality control in the experimental and production processes, and is convenient for accurate measurement and observation under the simulated breathing environment.

[0027] In this embodiment, as Figure 1 , Figure 2 and Figure 3 shown, a fixed plate 101 is hinged above the support frame 1. A limiting rod 103 is welded below the fixed plate 101. A first magnetic sheet 104 and a second magnetic sheet 102 are adhesively bonded below the fixed plate 101. The first magnetic sheet 104 and the second magnetic sheet 102 are respectively located on both sides of the limiting rod 103. A fixed seat 108 is installed on one side of the support frame 1 by screws. A limiting hole 106 is opened at the central position inside the fixed seat 108. A first magnetic sheet groove 105 and a second magnetic sheet groove 107 are respectively opened inside the fixed seat 108. The first magnetic sheet groove 105 and the second magnetic sheet groove 107 are respectively located on both sides of the limiting hole 106, and the external structure size of the limiting rod 103 is consistent with the internal hole size of the limiting hole 106; the size of the limiting rod 103 below the fixed plate 101 is consistent with the size of the limiting hole 106, which can prevent the fixed plate 101 from shifting, ensure accurate clamping of the mask, and avoid shifting during measurement, affecting the accuracy of the measurement result.

[0028] In this embodiment, as Figure 3 shown, the external structure size of the first magnetic sheet 104 is consistent with the internal structure size of the first magnetic sheet groove 105, and the external structure size of the second magnetic sheet 102 is consistent with the internal structure size of the second magnetic sheet groove 107; after the limiting rod 103 is clamped with the limiting hole 106, the first magnetic sheet 104 is accurately fixed in the second magnetic sheet groove 107 and the first magnetic sheet groove 105 through the second magnetic sheet 102, which can effectively prevent shifting during the measurement process.

[0029] Usage method and advantages of the present utility model: When using this device for evaluating the protection performance of masks, the working process is as follows:

[0030] As shown in FIGS. 1, 2, 3, 4, Figure 5 and Figure 6 shown, first, lay the mask flat above the support frame 1, place the fixed plate 101 vertically above the mask, insert the limiting rod 103 connected to the fixed plate 101 into the internal limiting hole 106, and the first magnetic sheet 104 and the second magnetic sheet 102 below the fixed plate 101 fit into the internal first magnetic sheet groove 105 and the second magnetic sheet groove 107 to prevent the mask from moving during the measurement. The air cylinder 202 drives the push plate 203 and the sliding sleeve 201 to move vertically downward in sequence, so that the peristaltic pump 4 connected to the push plate 203 moves. When the special suction cup 402 below the peristaltic pump 4 fits onto the mask, the device operates to suck materials. The particulate matter in the support seat 401 is sucked by the feed pipe 406, the particulate matter is transmitted to the discharge pipe 405, and is transmitted into the dust collection cup 3 through the discharge pipe 405, and the transparent observation window 302 is used for observation.

[0031] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A device for evaluating the protective performance of a mask, comprising a support frame (1), characterized in that: A connecting seat (2) is welded above the support frame (1), a peristaltic pump (4) is provided on one side of the connecting seat (2), and a dust collecting cup (3) is provided on one side of the peristaltic pump (4); A discharge pipe (405) and a feed pipe (406) are respectively plugged into one side of the peristaltic pump (4), a feed pipe (406) is provided below the discharge pipe (405), a card slot (404) is glued to the bottom of the peristaltic pump (4), a plug plate (403) is snapped into a hole groove on one side of the card slot (404), a support seat (401) is glued to the bottom of the plug plate (403), and a special suction cup (402) is provided below the support seat (401).

2. A device for evaluating the protective performance of a mask according to claim 1, characterized in that: A support plate (205) is welded to one side of the connecting seat (2), a slide bar (204) is welded above the support plate (205), a slide sleeve (201) is attached to the outer wall of the slide bar (204), a push plate (203) is welded above the slide sleeve (201), a cylinder (202) is installed above the push plate (203), and the push plate (203) forms a sliding structure with the slide sleeve (201) through the cylinder (202).

3. A device for evaluating the protective performance of a mask according to claim 1, characterized in that: The outer wall of the dust cup (3) is provided with a transparent observation window (302), a threaded sleeve (303) is welded at the bottom of the dust cup (3), an upper cover (301) is attached to the top of the dust cup (3), and the diameter of the upper inner ring of the dust cup (3) is consistent with the diameter of the lower outer ring of the upper cover (301), and a vertical rectangular transparent observation window (302) is provided on the outer wall of the dust cup (3), and the external structural dimensions of the upper single-threaded screw of the support seat (401) are consistent with the internal structural dimensions of the slot (404).

4. A device for evaluating the protective performance of a mask according to claim 1, characterized in that: The slot (404) is provided with a rectangular hole inside, the plug plate (403) is in the shape of an "n"-shaped plate, and the internal structural dimensions of the slot (404) are consistent with the dimensions of the upper rectangular plate of the plug plate (403), and the lower plate is glued to the top of the support seat (401).

5. A device for evaluating the protective performance of a mask according to claim 1, characterized in that: A fixing plate (101) is connected to the top of the support frame (1) through a hinge, a limiting rod (103) is welded to the bottom of the fixing plate (101), a first magnetic sheet (104) and a second magnetic sheet (102) are glued to the bottom of the fixing plate (101), the first magnetic sheet (104) and the second magnetic sheet (102) are respectively located on both sides of the limiting rod (103), a fixing seat (108) is installed on one side of the support frame (1) through screws, a limiting hole (106) is provided at the inner center position of the fixing seat (108), a first sheet suction groove (105) and a second sheet suction groove (107) are respectively provided inside the fixing seat (108), the first sheet suction groove (105) and the second sheet suction groove (107) are respectively located on both sides of the limiting hole (106), and the external structural size of the limiting rod (103) is consistent with the internal hole size of the limiting hole (106).

6. A device for evaluating the protective performance of a mask according to claim 5, characterized in that: The external structural dimensions of the first magnetic attraction sheet (104) are consistent with the internal structural dimensions of the first attraction sheet groove (105), and the external structural dimensions of the second magnetic attraction sheet (102) are consistent with the internal structural dimensions of the second attraction sheet groove (107).

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