Sampling head structure of dust sampler

Abstract

The utility model discloses a sampling head structure of a dust sampler, which belongs to the technical field of dust samplers and comprises a sampling head component, a moisture-proof structure is mounted at the front end of the sampling head component and comprises a moisture-proof shell and a plurality of air inlets B uniformly formed in the surface of the moisture-proof shell, a mounting plate is mounted in the moisture-proof shell, and the air inlets B are communicated with the moisture-proof shell. A plurality of heating wires are evenly distributed on the inner side of the installation plate, a guide cover used for guiding air is further installed in the damp-proof shell, the heating wires are turned on, dust can be heated, moisture can be removed, dust condensation can be effectively avoided, then dust and air continue to flow and enter the sampling head shell, and the sampling head can be used for sampling. Dust and air can be dried through a drying agent in the dehumidifying box, moisture in the dust is reduced, then the dust can be filtered through the filter membrane, the dust is collected through the collecting box, and the purpose of dust sampling and collecting can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust samplers, and particularly to a sampling head structure of a dust sampler. Background Technique

[0002] Dust samplers are devices used to collect samples of suspended particulate matter in the air. They are commonly used in environmental monitoring, industrial safety, and occupational health and safety fields. When conducting occupational health tests, the sampler inhales air and deposits the particulate matter therein on a sample collector, and then further analysis can be carried out to determine the composition and concentration thereof.

[0003] The existing Chinese patent with the publication number CN207456871U discloses a sampling head mechanism of an individual dust sampler, which includes a holding box. The interior of the holding box is a cylindrical cavity, and the downward extending part is a spherical cavity. An air inlet pipe is arranged on one side of the holding box, and the air inlet pipe communicates with the upper cylindrical cavity of the holding box. A threaded pipe is threadedly connected to the other side of the holding box, and a filter screen is arranged at the connection between the threaded pipe and the holding box. A coarse particle storage box is threadedly connected to the bottom of the lower spherical cavity of the holding box; it also includes a first filter membrane clip and a second filter membrane clip. A filter membrane is arranged between the first filter membrane clip and the second filter membrane clip. The filtering holes of the filter membrane are smaller than those of the filter screen. The first filter membrane clip and the second filter membrane clip are threadedly connected, and one end of the first filter membrane clip away from the second filter membrane clip is connected to one end of the threaded pipe away from the holding box. The filter screen is provided to facilitate the precipitation of dust particles with larger diameters into the coarse particle storage box. The filter membrane collects the dust particles passing through the filter screen.

[0004] In view of the above related technologies, the filter membrane can be fixed inside the sampling head structure by using the first filter membrane clip and the second filter membrane clip, and dust can be filtered. However, during the process of dust collection by the sampling head, in a high-humidity environment, the dust is likely to contain moisture, resulting in the condensation of particulate matter together, causing the dust to accumulate on the filter membrane, affecting the collection of dust and the subsequent result analysis.

[0005] Therefore, we propose a sampling head structure of a dust sampler to facilitate the solution of the problems raised above. Content of the Utility Model

[0006] The purpose of the utility model is to provide a sampling head structure of a dust sampler. By using this device for work, the problems that the dust is likely to contain moisture, resulting in the condensation of particulate matter together, causing the dust to accumulate on the filter membrane, affecting the collection of dust and the subsequent result analysis are solved.

[0007] To achieve the above object, the present utility model provides the following technical solutions: A sampling head structure of a dust sampler, including a sampling head component, a moisture-proof structure is installed at the front end of the sampling head component. The moisture-proof structure includes a moisture-proof housing and a plurality of air inlets B evenly opened on the surface of the moisture-proof housing. An installation plate is installed inside the moisture-proof housing, and a plurality of heating wires are evenly distributed on the inner side of the installation plate. A guiding cover for guiding air is also installed inside the moisture-proof housing. A sealing gasket is provided on one side of the moisture-proof housing close to the sampling head component, and the sealing gasket plays a sealing role. When the heating wires are turned on, the dust can be heated to remove moisture.

[0008] Preferably, an installation block is further provided on one side of the moisture-proof housing close to the sampling head component. The moisture-proof housing can be fixed on the sampling head component through the cooperation of the installation block and bolts.

[0009] Preferably, a dust sampler body is further provided on one side of the sampling head component. An installation seat is provided on one side of the dust sampler body close to the sampling head component. The sampling head component and the dust sampler body are connected through the installation seat.

[0010] Preferably, the sampling head component includes a sampling head housing and an air inlet A provided at the front end of the sampling head housing. A filter membrane is provided inside the sampling head housing, and a collection box for collecting dust is connected to the lower end of the sampling head housing. A dehumidification box is also provided inside the sampling head housing, and desiccants are distributed inside the dehumidification box.

[0011] Preferably, a connecting conduit is connected to one end of the sampling head housing away from the air inlet A, and the connecting conduit is threadedly connected inside the installation seat.

[0012] Preferably, a dust guiding tube is connected to the upper end of the collection box, the top end of the dust guiding tube is rotatably connected to the bottom wall of the sampling head housing, and the top opening of the dust guiding tube is placed on one side of the filter membrane.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By providing the moisture-proof structure and the sampling head component, before the sampling head component is used, the moisture-proof housing is sleeved on the sampling head component and fixed through the cooperation of the installation block and bolts, and the moisture-proof housing and the sampling head component can be sealed by using the sealing gasket, so that the moisture-proof structure can be fixed on the sampling head component, and the disassembly and assembly are simple.

[0015] 2. By providing the sampling head housing, the dehumidification box, the filter membrane, the heating wires and the collection box, when the heating wires are started, heat can be generated to dry the incoming air and dust, and the moisture in the air can be absorbed by the dehumidification box, which can dry the dust, so as to avoid the dust from accumulating on the filter membrane due to moisture condensation. Dehumidification is beneficial to the collection of dust. Brief Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the structure of the sampling head member of the present utility model;

[0018] Figure 3 is a schematic diagram of the internal structure of the sampling head housing of the present utility model;

[0019] Figure 4 is a schematic diagram of the moisture-proof structure of the present utility model.

[0020] In the figure: 1. Sampling head member; 11. Sampling head housing; 12. Air inlet A; 13. Connecting conduit; 14. Collection box; 141. Dust guide pipe; 15. Filter membrane; 16. Dehumidification box; 2. Dust sampler body; 3. Moisture-proof structure; 31. Moisture-proof housing; 311. Mounting block; 32. Air inlet B; 33. Mounting plate; 34. Heating wire; 35. Guide cover; 36. Sealing gasket; 4. Mounting seat. Detailed Description of the Preferred Embodiments

[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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment 1: Please refer to Figures 1-4 , a sampling head structure of a dust sampler, which includes a sampling head member 1. A moisture-proof structure 3 is installed at the front end of the sampling head member 1. The moisture-proof structure 3 includes a moisture-proof housing 31 and a plurality of air inlets B32 uniformly opened on the surface of the moisture-proof housing 31. An installation plate 33 is installed inside the moisture-proof housing 31. A plurality of heating wires 34 are uniformly distributed on the inner side of the installation plate 33. A guide cover 35 for guiding air is also installed inside the moisture-proof housing 31. A sealing gasket 36 is provided on one side of the moisture-proof housing 31 close to the sampling head member 1. The sealing gasket 36 plays a sealing role. Dust can enter the inside of the moisture-proof housing 31 through the air inlet B32, and then the heating wire 34 is turned on to heat the dust, which can remove moisture and effectively avoid dust condensation.

[0023] On one side of the moisture-proof housing 31 close to the sampling head member 1, there is also an installation block 311. Through the cooperation of the installation block 311 and bolts, the moisture-proof housing 31 can be fixed on the sampling head member 1. One end of the moisture-proof housing 31 with an opening is sleeved on the sampling head member 1, and a sealing gasket 36 is used to increase the sealing performance of the connection between the two. The installation block 311 will contact the sampling head member 1 and can be fixed with bolts. Conversely, it can be disassembled, thus achieving the purpose of disassembling and assembling the moisture-proof structure 3.

[0024] On one side of the sampling head member 1, there is also a dust sampler body 2. On the side of the dust sampler body 2 close to the sampling head member 1, there is an installation seat 4. The sampling head member 1 and the dust sampler body 2 are connected through the installation seat 4. The dust sampler body 2 can inhale air, so that dust enters the moisture-proof structure 3 along with the air.

[0025] The sampling head member 1 includes a sampling head housing 11 and an air inlet A12 provided at the front end of the sampling head housing 11. Inside the sampling head housing 11, there is a filter membrane 15, and at the lower end of the sampling head housing 11, there is a collection box 14 for collecting dust. Inside the sampling head housing 11, there is also a dehumidification box 16, and desiccants are distributed inside the dehumidification box 16. When dust and air enter the sampling head housing 11 from the air inlet A12, the desiccants inside the dehumidification box 16 can dry the dust and air, reducing the moisture in the dust. Then the dust can be filtered by the filter membrane 15, and the dust is collected through the collection box 14, thus completing the purpose of dust sampling and collection.

[0026] One end of the sampling head housing 11 away from the air inlet A12 is connected to a connecting conduit 13. The connecting conduit 13 is threadedly connected inside the installation seat 4. Through the connecting conduit 13 and the installation seat 4, the sampling head housing 11 and the dust sampler body 2 can be connected. The dust sampler body 2 can use a fan to guide the airflow and dust.

[0027] The upper end of the collection box 14 is connected to a dust guide pipe 141. The top end of the dust guide pipe 141 is rotatably connected to the bottom wall of the sampling head housing 11, and the top opening of the dust guide pipe 141 is placed on one side of the filter membrane 15. The dust that falls from the filter membrane 15 can enter the collection box 14 through the dust guide pipe 141, thus completing the collection of dust.

[0028] In this embodiment: The connecting conduit 13 is threadedly connected inside the mounting base 4 so that the sampling head housing 11 is connected to the dust sampler body 2. Then, one end opening of the moisture-proof housing 31 is sleeved on the sampling head member 1, and a gasket 36 is used to increase the sealing performance of the connection between the two. The mounting block 311 and bolts can be used for fixation, and vice versa, it can be disassembled, thus achieving the purpose of disassembling and assembling the moisture-proof structure 3. The dust sampler body 2 can use a fan to guide the airflow and dust, so that the dust and air enter the moisture-proof housing 31 from the air inlet B32. Then, the heating wire 34 is turned on to heat the dust, which can remove moisture and effectively avoid dust condensation. Then, the dust and air continue to flow and enter the sampling head housing 11. The desiccant in the dehumidification box 16 can dry the dust and air, reducing the moisture in the dust. Then, the dust can be filtered by the filter membrane 15, and the dust is collected by the collection box 14, thus completing the purpose of dust sampling and collection.

[0029] Working principle: The sampling head housing 11 is connected to the dust sampler body 2 through the cooperation of the connecting conduit 13 and the mounting base 4. Then, the moisture-proof housing 31 is fixedly installed at the front end of the sampling head housing 11. Then, the dust sampler body 2 can use a fan to guide the airflow and dust. The air and dust can enter the moisture-proof housing 31 from the air inlet B32. The heating wire 34 is used to dry the dust. When the dust and air continue to flow, they can enter the sampling head housing 11. The desiccant in the dehumidification box 16 can dry the dust and air. The dust can be filtered by the filter membrane 15, and the collection box 14 is used to complete the collection of the dust.

[0030] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. The sampling head structure of a dust sampler, comprising a sampling head member (1), characterized in that: A moisture-proof structure (3) is installed at the front end of the sampling head member (1). The moisture-proof structure (3) includes a moisture-proof housing (31) and a number of air inlets B (32) evenly opened on the surface of the moisture-proof housing (31). An installation plate (33) is installed inside the moisture-proof housing (31). A number of heating wires (34) are evenly distributed on the inner side of the installation plate (33). A guiding cover (35) for guiding air is also installed inside the moisture-proof housing (31). A sealing gasket (36) is arranged on the side of the moisture-proof housing (31) close to the sampling head member (1), and the sealing gasket (36) plays a sealing role.

2. The sampling head structure of a dust sampler according to claim 1, characterized in that: An installation block (311) is also arranged on the side of the moisture-proof housing (31) close to the sampling head member (1). The moisture-proof housing (31) can be fixed on the sampling head member (1) through the cooperation of the installation block (311) and bolts.

3. The sampling head structure of a dust sampler according to claim 2, characterized in that: A dust sampler body (2) is also arranged on one side of the sampling head member (1). An installation seat (4) is arranged on the side of the dust sampler body (2) close to the sampling head member (1).

4. The sampling head structure of a dust sampler according to claim 3, characterized in that: The sampling head member (1) includes a sampling head housing (11) and an air inlet A (12) arranged at the front end of the sampling head housing (11). A filter membrane (15) is arranged inside the sampling head housing (11). A collection box (14) for collecting dust is connected to the lower end of the sampling head housing (11). A dehumidification box (16) is also arranged inside the sampling head housing (11).

5. The sampling head structure of a dust sampler according to claim 4, characterized in that: A connecting conduit (13) is connected to the end of the sampling head housing (11) away from the air inlet A (12). The connecting conduit (13) is threadedly connected inside the installation seat (4).

6. The sampling head structure of a dust sampler according to claim 5, characterized in that: A dust guiding pipe (141) is connected to the upper end of the collection box (14). The top end of the dust guiding pipe (141) is rotatably connected to the bottom wall of the sampling head housing (11), and the top opening of the dust guiding pipe (141) is placed on one side of the filter membrane (15).

Images