A nanodust sampler

Abstract

The utility model relates to a kind of nanometer dust samplers, it includes sampling box, air inlet pipe, air pump, exhaust pipe, air inlet humidity control assembly and apron;Air inlet pipe one end is located in the outside of sampling box as air inlet, the other end is located in sampling box, and the air inlet of air pump is communicated;The air outlet of air pump is communicated with the one end of exhaust pipe;The other end of exhaust pipe is located in the outside of sampling box as air outlet;Apron is rotatably set on the air outlet of exhaust pipe, and can be opened when air pump works, and it is closed when air pump stops working;Air inlet humidity control assembly includes moisture-absorbing piece and humidity measuring element;Moisture-absorbing piece is set on the air inlet of air inlet pipe, for the gas that enters air inlet pipe to carry out dehumidification;Humidity measuring element is used to measure the gas humidity after dehumidification by moisture-absorbing piece.The utility model can guarantee that the gas in sampling bag is stable, avoid condensation due to excessive humidity, guarantee the accuracy of subsequent detection.

Description

Technical Field

[0001] This utility model relates to the field of occupational health testing equipment technology, and in particular to a nano dust sampler. Background Technology

[0002] A dust sampler is a portable device used to collect dust samples from dusty air. Measuring the concentration of dust in the air is necessary not only for safety management but also to provide a scientific basis for researching dust prevention, reduction, and removal measures. Using a sampler to measure dust is a widely recognized method with high accuracy. It is widely used in occupational health monitoring and evaluation in sectors such as disease prevention, environmental monitoring, labor protection, safety supervision, military, scientific research and teaching, metallurgy, petrochemicals, railways, and building materials, and is specifically used to determine the average dust concentration in the air within production workshops. Most existing samplers use an air pump to extract ambient gas and then inject the extracted gas into a sampling bag. However, in actual use, it has been found that dust clumps inside the sampling bag, affecting the accuracy of subsequent measurements, especially when sampling tiny particles such as nanoparticles. These problems urgently need to be addressed. Utility Model Content

[0003] This utility model discloses a nano dust sampler, which aims to solve the technical problems existing in the prior art.

[0004] The present invention adopts the following technical solution:

[0005] This invention provides a nanoparticle dust sampler, comprising a sampling chamber, an air inlet pipe, an air pump, an exhaust pipe, an air inlet humidity control component, and a cover plate. One end of the air inlet pipe is located outside the sampling chamber as an air inlet, and the other end is located inside the sampling chamber and connected to the air inlet of the air pump. The exhaust port of the air pump is connected to one end of the exhaust pipe. The other end of the exhaust pipe is located outside the sampling chamber as an exhaust port. The cover plate is rotatably mounted on the exhaust port of the exhaust pipe and can be opened when the air pump is working and closed when the air pump stops working. The air inlet humidity control component includes a moisture-absorbing element and a humidity measuring element. The moisture-absorbing element is disposed on the air inlet of the air inlet pipe and is used to dehumidify the gas entering the air inlet pipe. The humidity measuring element is used to measure the humidity of the gas after it has been dehumidified by the moisture-absorbing element.

[0006] In a nanoparticle dust sampler of this utility model, a pressure control component is also included; the pressure control component is disposed on the exhaust pipe and is used to open when the pressure in the exhaust pipe exceeds a threshold, so as to discharge the gas in the exhaust pipe.

[0007] In a nanoparticle dust sampler of this utility model, the pressure control component includes a sealing component and a counterweight. The sealing component is disposed on the pressure relief port at the top of the exhaust pipe, with one end located outside the pressure relief port to seal it, and the other end located inside the exhaust pipe and having a limiting part. The limiting part is used to restrict the sealing component from detaching from the pressure relief port, and the sealing component can move to open or close the pressure relief port. The counterweight is disposed on the sealing component and is used to adjust the pressure inside the exhaust pipe required when the sealing component is raised.

[0008] In a nanoparticle dust sampler of this utility model, the pressure control component includes a sealing component and an elastic component; the sealing component is disposed on the pressure relief port of the exhaust pipe; the elastic component is connected to the sealing component and the inner wall of the exhaust pipe, so that the sealing component abuts against the pressure relief port to achieve a sealed connection between the two.

[0009] In a nanoparticle dust sampler of this utility model, the elastic component includes a fixed sleeve, an elastic element, a sleeve rod, and a nut; the fixed sleeve is fixedly disposed inside the exhaust pipe and is disposed corresponding to the pressure relief port; one end of the sleeve rod is located at the sealing element, the fixed sleeve, and the elastic element and has a limiting flange at the end, and the other end is screwed to the nut; the limiting flange is used to restrict the elastic element from detaching from the sleeve rod.

[0010] In a nanoparticle dust sampler of this invention, a valve is provided on the exhaust pipe.

[0011] In a nanoparticle dust sampler of this utility model, the cover plate includes a sleeve and a cover body; the sleeve is fitted onto the end of the exhaust pipe; the cover body is placed over the port of the sleeve, and its edge is rotatably connected to the sleeve.

[0012] In a nanoparticle dust sampler of this utility model, the moisture-absorbing component includes an elastic sleeve and an adsorbent container; the elastic sleeve is fitted onto the adsorbent container and inserted into the end of the air inlet pipe; the adsorbent container is provided with vent holes at the two ends corresponding to the elastic sleeve, and contains adsorbent inside.

[0013] In a nanoparticle dust sampler of this invention, a controller is also included; the controller is connected to the humidity measuring element and the air pump to control the rotation speed of the air pump based on the measured value of the humidity measuring element.

[0014] In a nanoparticle dust sampler of this invention, the air pump is a variable frequency pump.

[0015] The technical solution adopted in this utility model can achieve the following beneficial effects:

[0016] This invention provides a nanoparticle dust sampler. Based on a moisture-absorbing component to treat the incoming air, it reduces the humidity of the gas entering the sampling bag, thus preventing dust agglomeration due to excessive humidity and ensuring the accuracy of subsequent testing. Furthermore, by installing a cover at the exhaust port of the exhaust pipe, a vacuum pump and the moisture-absorbing component work together to expel moisture from the inlet and outlet pipes during the initial sampling stage, preventing it from affecting the stability of the gas inside the sampling bag. After the moisture in the inlet and outlet pipes is expelled, the cover automatically closes, preventing re-entry of ambient moisture. Sampling at this time ensures the stability of the gas inside the sampling bag, preventing agglomeration due to excessive humidity and ensuring the accuracy of subsequent testing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of this utility model. The illustrative embodiments of this utility model and their descriptions explain this utility model and do not constitute an improper limitation of this utility model. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a nanoparticle dust sampler according to the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of a nanoparticle dust sampler according to the present invention;

[0020] Figure 3 This is a schematic diagram of the pressure control component in a preferred embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the pressure control component in another preferred embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the cover plate of this utility model;

[0023] Figure 6 This is a schematic diagram of the moisture-absorbing component of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Sampling box; 2. Air inlet pipe; 3. Air pump; 4. Exhaust pipe; 5. Air inlet humidity control component; 51. Moisture absorbent component; 511. Elastic sleeve; 512. Adsorbent container; 52. Humidity measuring element; 6. Cover plate; 61. Sleeve sleeve; 62. Cover body; 7. Pressure control component; 71. Sealing component; 72. Elastic component; 721. Fixing sleeve; 722. Elastic component; 723. Sleeve rod; 724. Nut; 73. Counterweight; 8. Controller; 9. Valve. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this utility model, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly stated otherwise.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a magnetic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0028] Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] To address the problems existing in the prior art, this application provides a nanoparticle dust sampler.

[0030] like Figure 1 and Figure 2 As shown, a nanoparticle dust sampler includes a sampling chamber 1, an air inlet pipe 2, an air pump 3, an exhaust pipe 4, an air inlet humidity control component 5, and a cover plate 6. One end of the air inlet pipe 2 is located outside the sampling chamber 1 as an air inlet, and the other end is located inside the sampling chamber 1 and connected to the air inlet of the air pump 3. The exhaust port of the air pump 3 is connected to one end of the exhaust pipe 4. The other end of the exhaust pipe 4 is located outside the sampling chamber 1 as an exhaust port. The cover plate 6 is rotatably mounted on the exhaust port of the exhaust pipe 4 and can be opened when the air pump 3 is working and closed when the air pump 3 stops working. The air inlet humidity control component 5 includes a moisture-absorbing element 51 and a humidity measuring element 52. The moisture-absorbing element 51 is disposed on the air inlet of the air inlet pipe 2 and is used to dehumidify the gas entering the air inlet pipe 2. The humidity measuring element 52 is used to measure the humidity of the gas after it has been dehumidified by the moisture-absorbing element 51.

[0031] This invention discloses a nano-dust sampler. Based on the use of a moisture-absorbing component 51 to treat the incoming air, the humidity of the gas entering the sampling bag can be reduced, thereby avoiding dust agglomeration caused by excessive humidity and ensuring the accuracy of subsequent detection. Furthermore, based on the cover plate 6 installed at the exhaust port of the exhaust pipe 4, the air pump 3 and the moisture-absorbing component 51 work together to expel moisture from the air inlet pipe 2 and exhaust pipe 4 at the beginning of sampling, preventing it from affecting the stability of the gas in the sampling bag. After the moisture in the air inlet pipe 2 and exhaust pipe 4 is expelled, the cover plate 6 automatically closes, preventing moisture from the environment from re-entering. Sampling at this time ensures the stability of the gas in the sampling bag, avoiding agglomeration caused by excessive humidity and ensuring the accuracy of subsequent detection.

[0032] In some preferred embodiments, such as Figure 2 As shown, it also includes a pressure control component 7; the pressure control component 7 is disposed on the exhaust pipe 4 and is used to open when the pressure in the exhaust pipe 4 exceeds the threshold, so as to discharge the gas in the exhaust pipe 4; based on the setting of the pressure control component 7, it is possible to avoid filling the sampling bag with too much gas and causing it to burst.

[0033] In some preferred embodiments, such as Figure 3 As shown, the pressure control component 7 includes a plug 71 and an elastic component 72; the plug 71 is disposed on the pressure relief port of the exhaust pipe 4; the elastic component 72 is connected to the plug 71 and the inner wall of the exhaust pipe 4 so that the plug 71 abuts against the pressure relief port to achieve a sealed connection between the two.

[0034] Preferably, the elastic component 72 includes a fixed sleeve 721, an elastic element 722, a sleeve rod 723, and a nut 724; the fixed sleeve 721 is fixedly disposed inside the exhaust pipe 4 and is disposed corresponding to the pressure relief port; one end of the sleeve rod 723 is located between the sealing component 71, the fixed sleeve 721, and the elastic element 722 and has a limiting flange at the end, and the other end is screwed to the nut 724; the limiting flange is used to restrict the elastic element 722 from disengaging from the sleeve rod 723; based on this, the pressure required for opening the sealing component 71 can be continuously adjusted, thereby achieving a wider range of adjustments.

[0035] In some preferred embodiments, such as Figure 4As shown, the pressure control component 7 includes a sealing component 71 and a counterweight 73. The sealing component 71 is disposed on the pressure relief port at the top of the exhaust pipe 4, with one end located outside the pressure relief port to seal it, and the other end located inside the exhaust pipe 4, and has a limiting part. The limiting part is used to restrict the sealing component 71 from disengaging from the pressure relief port. The sealing component 71 can move to open or close the pressure relief port, that is, it can move telescopically along the pressure relief port. The counterweight 73 is disposed on the sealing component 71 and is used to adjust the pressure inside the exhaust pipe 4 required when the sealing component 71 is raised. By setting different numbers of counterweights 73, the pressure inside the exhaust pipe 4 required when the sealing component 71 is raised can be adjusted. This pressure control component 7 has a simple structure and is easy to adjust. Specifically, the top of the sealing component 71 has a receiving groove, and the counterweight 73 is disposed in the receiving groove.

[0036] In some preferred embodiments, such as Figure 5 As shown, the cover plate 6 includes a sleeve 61 and a cover body 62; the sleeve 61 is fitted onto the end of the exhaust pipe 4; the cover body 62 is placed on the port of the sleeve 61, and its edge is rotatably connected to the sleeve 61; the cover body 62 can be placed on the port of the sleeve 61 by its own weight, or can be automatically closed after being opened by a torsion spring.

[0037] Preferably, the cover 62 is automatically reset to the port position of the sealing sleeve 61 by a torsion spring.

[0038] In some preferred embodiments, such as Figure 1 and Figure 2 As shown, a valve 9 is installed on the exhaust pipe 4. Based on the valve 9, the sampling bag can be placed on the exhaust port of the exhaust pipe 4 at the beginning of sampling. When the humid air in the intake pipe 2 and the exhaust pipe 4 is discharged, the valve 9 is closed so that the gas is discharged by the pressure control component 7. After the moisture in the pipe is emptied, the valve 9 is opened to take a sample.

[0039] In some preferred embodiments, such as Figure 6 As shown, the moisture-absorbing component 51 includes an elastic sleeve 511 and an adsorbent container 512; the elastic sleeve 511 is fitted onto the adsorbent container 512 and inserted into the end of the air inlet pipe 2; the adsorbent container 512 has vent holes at the two ends corresponding to the elastic sleeve 511, and contains adsorbent inside; by fixing the adsorbent container 512 with the elastic sleeve 511, on the one hand, installation is easy and it is convenient to replace the adsorbent in the adsorbent container 512; on the other hand, it prevents the drawn-in gas from flowing in through the gap between the adsorbent container 512 and the air inlet pipe 2, ensuring that the drawn-in gas is fully dried; specifically, the adsorbent can be a molecular sieve, water-absorbing resin, or other moisture-absorbing material.

[0040] In some preferred embodiments, such as Figure 1As shown, it also includes a controller 8; the controller 8 is connected to the humidity measuring element 52 and the air pump 3 to control the rotation speed of the air pump 3 based on the measurement value of the humidity measuring element 52; based on the control of the rotation speed of the air pump 3 by the controller 8, only the humidity value of the discharged gas can be controlled, that is, when it is necessary to reduce the humidity value of the discharged gas, the controller 8 controls the rotation speed of the air pump 3 to decrease, thereby increasing the residence time of the gas in the adsorbent container 512 and thus reducing the humidity value of the discharged gas; conversely, the rotation speed of the air pump 3 is increased, thereby increasing the humidity value of the discharged gas.

[0041] In some preferred embodiments, the air pump 3 is a variable frequency pump.

[0042] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A nanoparticle sampler comprising: Includes sampling box, air inlet pipe, air pump, exhaust pipe, air inlet humidity control components and cover plate; One end of the air inlet pipe is located outside the sampling box as an air inlet, and the other end is located inside the sampling box and is connected to the air inlet of the air pump. The exhaust port of the air pump is connected to one end of the exhaust pipe; The other end of the exhaust pipe is located outside the sampling box and serves as the exhaust port. The cover plate is rotatably disposed on the exhaust port of the exhaust pipe and can be opened when the air pump is working and closed when the air pump stops working; The air intake humidity control component includes a moisture-absorbing element and a humidity measuring element; The moisture-absorbing element is disposed on the air inlet of the air inlet pipe and is used to dehumidify the gas entering the air inlet pipe; The humidity measuring element is used to measure the humidity of the gas after it has been dehumidified by the moisture-absorbing element.

2. The nano-dust sampler according to claim 1, wherein It also includes pressure control components; The pressure control component is installed on the exhaust pipe and is used to open when the pressure in the exhaust pipe exceeds a threshold, so as to discharge the gas in the exhaust pipe.

3. The nanoparticle sampler according to claim 2, characterized in that, The pressure control component includes a sealing component and a counterweight; The sealing member is disposed on the pressure relief port at the top of the exhaust pipe, with one end located outside the pressure relief port to block the pressure relief port, and the other end located inside the exhaust pipe and having a limiting part; the limiting part is used to restrict the sealing member from detaching from the pressure relief port, and the sealing member can move to open or close the pressure relief port; The counterweight is disposed on the sealing member and is used to adjust the pressure inside the exhaust pipe required when the sealing member is raised.

4. The nano-dust sampler according to claim 2, wherein The pressure control component includes a sealing element and an elastic component; The sealing element is disposed on the pressure relief port of the exhaust pipe; The elastic component is connected to the sealing member and the inner wall of the exhaust pipe so that the sealing member abuts against the pressure relief port to achieve a sealed connection between the two.

5. A nano-dust sampler according to claim 4, characterized in that The elastic component includes a fixed sleeve, an elastic element, a sleeve rod, and a nut; The fixing sleeve is fixedly installed inside the exhaust pipe and is provided corresponding to the pressure relief port; One end of the sleeve is located between the sealing member, the fixing sleeve and the elastic member and has a limiting flange at the end, and the other end is screwed to the nut; The limiting flange is used to prevent the elastic element from disengaging from the sleeve.

6. The nano-dust sampler according to claim 2, wherein A valve is installed on the exhaust pipe.

7. A nano-dust sampler according to any of the preceding claims 1-6, characterized in that The cover plate includes a sleeve and a cover body; The sleeve is fitted onto the end of the exhaust pipe; The cover is placed over the port of the sleeve, and its edge is rotatably connected to the sleeve.

8. A nano-dust sampler according to any of the preceding claims 1-6, characterized in that The moisture-absorbing component includes an elastic sleeve and an adsorbent container; The elastic sleeve is fitted onto the adsorbent container and inserted into the end of the air inlet pipe; The adsorbent container has vent holes at the two ends corresponding to the elastic sleeve, and contains adsorbent inside.

9. A nano-dust sampler according to any of the preceding claims 1-6, characterized in that It also includes the controller; The controller is connected to the humidity measuring element and the air pump to control the rotational speed of the air pump based on the measured value of the humidity measuring element.

10. A nano-dust sampler according to any of the preceding claims 1-6, characterized in that The air pump is a variable frequency pump.

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