CN216449399U - Glass cavity device for detecting filtering efficiency of mask - Google Patents
Glass cavity device for detecting filtering efficiency of mask Download PDFInfo
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- CN216449399U CN216449399U CN202122987790.5U CN202122987790U CN216449399U CN 216449399 U CN216449399 U CN 216449399U CN 202122987790 U CN202122987790 U CN 202122987790U CN 216449399 U CN216449399 U CN 216449399U
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Abstract
The utility model discloses a glass cavity device for detecting the filtering efficiency of a mask. The mask comprises two hollow cylinders with the same size and without covers and a clamping groove which can fix the two cylinders on the left side and the right side respectively, wherein the two cylinders form a closed organic glass cavity, and a mask to be detected is arranged at the position corresponding to the clamping groove. The bottom of each hollow cylinder is provided with a hole for gas to enter and exit; the wall surface is provided with holes for detecting the effect of the mask after filtration, so as to facilitate comparison. The utility model provides convenient experimental conditions for comparing the filtering efficiency of different types of masks by detecting the concentration and the type of gas before and after filtering through the mask.
Description
Technical Field
The utility model relates to the field of mask quality detection, and particularly provides a glass cavity device for detecting the filtering efficiency of a mask.
Background
The mask is a necessity in our human life, and comprises a daily protective mask, an occupational protective mask and a medical protective mask. In daily life, people usually wear civil masks and medical masks mainly made of melt-blown cloth in order to prevent toxic and harmful substances from being absorbed into the human body, however, a lot of mask manufacturers exist, the quality of masks of the same type on the market is uneven, and the filtering efficiency is also different.
Therefore, in order to identify the filtering efficiency, i.e., the filtering efficiency, of different masks, different kinds of masks need to be detected and then compared to find out the mask kind with higher filtering efficiency. In some mask manufacturers, sodium chloride solution is commonly used to make particles, and then a photometer and a flowmeter are used to control the counting of the particles, so as to detect the filtration efficiency of different masks.
Disclosure of Invention
The utility model aims to provide a glass cavity device for detecting the filtering efficiency of a mask.
The mask comprises two hollow cylinders with the same size and without covers and a clamping groove which can fix the two cylinders on the left side and the right side respectively, wherein the two cylinders form a closed organic glass cavity;
the center of the bottom of one of the hollow cylinders is provided with an 1/8 threaded hole for connecting an air inlet pipe, so that gas generated by the particle generator enters the organic glass cavity through the air inlet pipe, and the wall of the hollow cylinder is also provided with a 1/8 threaded hole for connecting a particle detector and detecting the concentration and the type of impurity gas before filtering by the mask.
The center of the bottom of the other hollow cylinder is provided with an 1/8 threaded hole for discharging gas in the glass cavity, and the wall of the hollow cylinder is also provided with a 1/8 threaded hole for connecting a particle detector and detecting the concentration and the type of impurity gas filtered by the mask.
Furthermore, the hollow cylinder and the clamping groove are made of organic glass.
Furthermore, the mask further comprises a buckle which is arranged on the other hollow cylinder and the clamping groove and is used for fixing the mask and enabling the clamping groove to be completely matched with the hollow cylinder without air leakage.
Furthermore, a stop valve is arranged on a threaded hole of 1/8 on the wall of the hollow cylinder and is used for externally connecting the particle detector.
Furthermore, the mask is tightly attached by a rubber ring.
The utility model has the beneficial effects that:
the utility model provides a glass cavity experimental device capable of detecting the filtering efficiency of the mask in a laboratory environment by detecting the concentration and the type of gas before and after filtering through the mask, and provides convenient experimental conditions for comparing the filtering efficiency of different types of masks;
according to the utility model, the buckle is arranged on the clamping groove and the cylinder on the right side of the clamping groove, so that the mask is perfectly arranged in the glass cavity, the air tightness of the glass cavity is ensured, and great convenience is provided for switching the mask in the experiment;
the stop valve is screwed on the threaded hole in the glass cavity through the quick plug, so that great convenience is brought to the control of the gas flow rate in the experiment.
Drawings
FIG. 1 is a left side view of the device (with no clasp installed);
FIG. 2 is a right side view of the device (with no clasp installed);
FIG. 3 is a top view of the assembled buckle;
FIG. 4 is an isometric view after the buckle is installed;
a1, a left hollow cylinder; a2, a right hollow cylinder B is a clamping groove; c1, gas input end; c2: a gas discharge end; c3, C4: a particle detector probe reserved port; e, a rubber ring; and D, a rubber ring.
Detailed Description
The utility model is further explained below with reference to fig. 1 and 2:
the utility model comprises two hollow cylinders A1 and A2 with the same size and without a bottom and a cover, and a clamping groove B which can respectively fix the two hollow cylinders A1 and A2 at the left side and the right side, wherein the three are made of organic glass to form a closed organic glass cavity.
A cylinder A1 is arranged on the left side of a clamping groove of the glass cavity, a threaded hole C1 of 1/8 is formed in the center of the bottom of the glass cavity and used for being connected with a 6mm pipe, gas generated by the particle generator enters the organic glass cavity through the pipe, and a threaded hole C3 of 1/8 is formed in the wall of the cylinder A1 and used for being connected with a particle detector to detect the concentration and the type of impurity gas before being filtered by the mask.
The draw-in groove right side in this glass chamber is a hollow cylinder A2, its bottom center also has a screw hole C2 of 1/8, be used for the gas in the discharge glass chamber, there is a screw hole C4 of 1/8 on the cylinder A2 wall, also be used for connecing the particle detector, detect impurity gas concentration and the kind after the gauze mask filters, under the prerequisite of guaranteeing glass chamber gas tightness, through the gas concentration and the contrast of kind before and after the gauze mask filters, explore the filtration efficiency of gauze mask.
This draw-in groove B in glass chamber will guarantee with the left and right sides cylinder A1, the switching of gauze mask will conveniently carry out in the gas tightness after A2 assembles together.
Furthermore, the size between the clamping groove B and the left cylinder A1 is reasonable, so that the cylinder A1 can be fixed in the clamping groove B, and meanwhile, the gap at the assembly position of the cylinder A1 and the clamping groove B is bonded by aerosol, and the air tightness of the part of the glass cavity can be guaranteed.
Further, the switching of the mask refers to that the mask to be tested is fixed in the glass cavity while the air tightness is guaranteed between the clamping groove B and the right cylinder A2.
Further, clamping a layer of mask means that the mask is paved, cut into a circular sheet with the size similar to the outer diameter of the cylinder, and placed at the position of the opening of the cylinder A2, so that the mask is attached to the opening of the cylinder, and meanwhile, an annular rubber ring is placed in the right groove of the clamping groove B.
Further, the thickness of the rubber ring E is approximately 3mm, and the purpose is to fix the cylinder A2 port attached to the mask on the clamping groove B with the rubber ring and then fix the cylinder A2 port by the spring buckle D, so that the mask can be placed in the sealed glass cavity.
Furthermore, buckle D installs on right side cylinder A2 wall and draw-in groove B for fixed gauze mask and make draw-in groove B and the perfect adaptation of right side cylinder A2, do not run out.
Furthermore, the closed glass cavity formed by assembling the cylinders A1 and A2 and the clamping groove B is made of high-temperature and high-pressure resistant transparent organic glass.
The experimental use method of the device is as follows:
firstly, the two cylinders A1 and A2 and the clamping groove B are sequentially placed according to the positions of the cylinder A1, the clamping groove B and the cylinder A2 from left to right, and the rubber ring is placed in a right groove of the clamping groove B.
And secondly, assembling the cylinder A1 on the left side of the clamping groove B with the clamping groove B to fix the cylinder A1 in the clamping groove B, and sticking the joint of the clamping groove B and the cylinder A1 by aerosol to ensure that the clamping groove B and the cylinder A1 are airtight.
And thirdly, screwing the two threaded holes C1 and C2 into the quick insertion of the butt joint, screwing the two threaded holes C3 and C4 into the stop valve of the butt joint and the pipe of the corresponding model.
Fourthly, placing the disc-shaped mask at the position of the cylinder A2 on the right side of the clamping groove B, fixing the mask and the cylinder in the clamping groove B together, and clamping the mask by the buckle.
And fifthly, introducing nitrogen into the pipe at the center of the bottom of the cylinder A1 at the left side of the clamping groove B, wherein only the threaded hole C2 at the center of the bottom of the cylinder A2 at the right side of the clamping groove B is provided with air, and the rest parts are closed.
And sixthly, after the air in the glass cavity is driven, switching the nitrogen into the gas generated by the particle generator.
And seventhly, when the gas is filled and stabilized in the glass cavity, a particle probe is firstly connected to the quick plug on the wall of the left cylinder A1, and the stop valve is opened to ventilate the gas, so that the concentration and the type of the gas which is not filtered by the mask can be detected. The particle probe is then inserted into the quick plug on the wall of the right cylinder a2 and the shut-off valve is opened to allow venting, thus allowing detection of the concentration and type of gas filtered through the mask.
And eighthly, observing the gas concentration and the gas type before and after filtering through the mask, and obtaining the filtering efficiency of the mask.
The buckle is opened, the masks are switched, the steps are repeated, and the filtering efficiency of different masks is compared, so that the mask type with higher requirements can be obtained.
The utility model is not the best known technology. The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. The utility model provides a glass chamber device for detecting gauze mask filtration efficiency which characterized in that:
the mask comprises two hollow cylinders with the same size and without covers and a clamping groove which can fix the two cylinders on the left side and the right side respectively, wherein the two cylinders form a closed organic glass cavity;
the center of the bottom of one hollow cylinder is provided with an 1/8 threaded hole for connecting an air inlet pipe, so that air generated by a particle generator enters an organic glass cavity through the air inlet pipe, and the wall of the hollow cylinder is also provided with a 1/8 threaded hole for connecting a particle detector and detecting the concentration and the type of impurity gas before being filtered by the mask;
the center of the bottom of the other hollow cylinder is provided with an 1/8 threaded hole for discharging gas in the glass cavity, and the wall of the hollow cylinder is also provided with a 1/8 threaded hole for connecting a particle detector and detecting the concentration and the type of impurity gas filtered by the mask.
2. A glass chamber assembly for testing filtration efficiency of a facemask as defined in claim 1, wherein: the hollow cylinder and the clamping groove are made of organic glass.
3. A glass chamber assembly for testing filtration efficiency of a facemask as defined in claim 1, wherein: the mask is characterized by further comprising a buckle which is arranged on the other hollow cylinder and the clamping groove and used for fixing the mask and enabling the clamping groove to be completely matched with the hollow cylinder without air leakage.
4. A glass chamber assembly for testing filtration efficiency of a facemask as defined in claim 1, wherein: a stop valve is arranged on a threaded hole of the 1/8 on the wall of the hollow cylinder and is used for externally connecting the particle detector.
5. A glass chamber device for testing the filtering efficiency of a respirator as set forth in claim 1, wherein: the mask is tightly attached by a rubber ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122987790.5U CN216449399U (en) | 2021-12-01 | 2021-12-01 | Glass cavity device for detecting filtering efficiency of mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122987790.5U CN216449399U (en) | 2021-12-01 | 2021-12-01 | Glass cavity device for detecting filtering efficiency of mask |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216449399U true CN216449399U (en) | 2022-05-06 |
Family
ID=81356074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122987790.5U Active CN216449399U (en) | 2021-12-01 | 2021-12-01 | Glass cavity device for detecting filtering efficiency of mask |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216449399U (en) |
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2021
- 2021-12-01 CN CN202122987790.5U patent/CN216449399U/en active Active
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