A filter membrane type dust sampler

Abstract

The utility model discloses a filter membrane formula dust sampler relates to dust sampler technical field, and its technical scheme main points are: including sampler and install on the sampler's sampling head, install in the sampling head has filter membrane, install on the sampling head with the filter head screw connection of sampling head, be provided with a plurality of longitudinal distribution's installation port on the filter head, install the filter plate in the installation port, be provided with the limiting mechanism for limiting filter plate on the filter head, the baffle for sealing installation port is slidably installed on the filter head. The utility model discloses set up the filter head with the screw connection of sampling head, and set up a plurality of longitudinal distribution's installation port on the filter head, and then can install the filter plate of different aperture in the installation port according to actual demand, and then can simplify the installation process, and do not need to carry too many filter heads, make and carry and install become simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of dust sampler technology, and more specifically, to a membrane dust sampler. Background Technology

[0002] A dust sampler is a portable device that collects dust samples from dusty air to determine the concentration of dust in the air. In addition to the needs of safe production management, it is also used to provide a scientific basis for research on dust prevention, dust reduction, and dust removal measures. Using a sampler to measure dust is a recognized method with high accuracy. It is widely used in health monitoring and evaluation in departments such as disease prevention, environmental monitoring, labor protection, safety supervision, military, scientific research and teaching, metallurgy, petrochemicals, railways, and building materials. It is specifically used to determine the average concentration of dust in the air in the workplace of production teams.

[0003] The dust sampler has a detachable sampling head with a filter membrane inside. By installing filter heads with different pore sizes on the sampling head, it is possible to collect particles of different sizes. However, when it is necessary to collect small dust particles, both large-pore and small-pore filter heads need to be installed at the same time to filter the dust layer by layer. This requires carrying multiple filter heads, which is not only very inconvenient to carry, but also very inconvenient to install.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a membrane dust sampler in order to solve the above-mentioned problems.

[0006] The above-mentioned technical objective of this utility model embodiment is achieved through the following technical solution: a membrane dust sampler, including a sampler and a sampling head installed on the sampler, a filter membrane is installed inside the sampling head, a filter head threadedly connected to the sampling head is installed on the sampling head, a plurality of longitudinally distributed mounting ports are provided on the filter head, a filter plate is installed inside the mounting ports, a limiting mechanism for limiting the position of the filter plate is provided on the filter head, and a baffle for sealing the mounting ports is slidably installed on the filter head.

[0007] The present invention is further configured such that: the filter plate includes a mounting plate that abuts against the mounting port and a filter screen fixedly connected to the mounting plate; when the mounting plate is fitted with the mounting port, the filter screen is located inside the sampler and the edge of the filter screen is in contact with the inner wall of the sampler; the limiting mechanism includes a connecting block fixedly connected to the mounting plate; a limiting block is slidably connected inside the connecting block; a fixing block is fixedly connected to the filter head; and a limiting groove that engages with the limiting block is provided inside the fixing block.

[0008] The present invention is further configured such that: a groove is provided on the connecting block, and an abutment plate extending out of the groove is fixedly connected to one end of the limiting block located in the groove, and a spring is fixedly connected between the abutment plate and the connecting block.

[0009] The present invention is further configured such that a guide surface is provided at one end of the limiting block near the fixing block.

[0010] The present invention is further configured such that: a cavity is provided inside the mounting port, the baffle slides in fit with the cavity, and a slot is provided on the lower surface of the mounting port to engage with the baffle.

[0011] The present invention is further configured such that: the filter head is provided with a sliding groove communicating with the cavity at the upper end of the installation port, and an adjustment block extending out of the sliding groove and slidingly engaging with the sliding groove is fixedly connected to the baffle.

[0012] In summary, this utility model has the following beneficial effects:

[0013] By setting a filter head that is threadedly connected to the sampling head, and setting multiple longitudinally distributed mounting ports on the filter head, filter plates with different pore sizes can be installed in the mounting ports according to actual needs. When collecting large dust particles, only one filter plate needs to be installed at the top mounting port, and the mounting ports below are sealed by sliding baffles to collect dust. When collecting small dust particles, filter plates are installed in the mounting ports in descending order of pore size to collect small dust particles. This simplifies the installation process and eliminates the need to carry too many filter heads, making both carrying and installation simple and convenient. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a membrane dust sampler according to the present invention;

[0015] Figure 2 This is a schematic diagram of the filter head in this utility model;

[0016] Figure 3 This is a cross-sectional view of the filter head in this utility model;

[0017] Figure 4 This is a schematic diagram of the filter plate in this utility model.

[0018] Reference numerals in the attached drawings: 1. Sampler; 2. Sampling head; 3. Filter head; 4. Mounting port; 5. Filter plate; 6. Limiting mechanism; 7. Baffle; 8. Mounting plate; 9. Filter screen; 10. Connecting block; 11. Limiting block; 12. Fixing block; 13. Limiting groove; 14. Groove; 15. Abutment plate; 16. Spring; 17. Guide surface; 18. Cavity; 19. Slot; 20. Slide groove; 21. Adjusting block. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] In one possible embodiment, please refer to Figure 1 , Figure 2 and Figure 3 As shown, a membrane dust sampler includes a sampler 1 and a sampling head 2 mounted on the sampler 1. A filter membrane is installed inside the sampling head 2, and a filter head 3 is threadedly connected to the sampling head 2. Dust is collected through the filter head 3, causing the dust to gather on the filter membrane. After sampling, the filter membrane can be removed for testing by unscrewing the filter head 3 to determine the air quality. The filter head 3 is provided with multiple longitudinally distributed mounting ports 4, and filter plates 5 are installed in the mounting ports 4. Filter plates 5 with different pore sizes can be installed in the mounting ports 4 according to actual needs, which simplifies the installation process and eliminates the need to carry too many filter heads 3, making both carrying and installation simple and convenient.

[0021] For further details, please refer to Figure 2 , Figure 3 and Figure 4 As shown, the filter head 3 is provided with a limiting mechanism 6 for limiting the filter plate 5. By setting the limiting mechanism 6, the stability of the filter plate 5 installation can be ensured, and it is not easy to detach from the filter head 3. The filter plate 5 includes a mounting plate 8 that abuts against the mounting port 4 and a filter screen 9 fixedly connected to the mounting plate 8. When the mounting plate 8 is fitted with the mounting port 4, the filter screen 9 is located inside the sampler 1 and the edge of the filter screen 9 is in contact with the inner wall of the sampler 1. The limiting mechanism 6 includes a connecting block 10 fixedly connected to the mounting plate 8. A limiting block 11 is slidably connected in the connecting block 10. A fixing block 12 is fixedly connected to the filter head 3. A limiting groove 13 that engages with the limiting block 11 is provided in the fixing block 12. By engaging the limiting block 11 with the limiting groove 13, the filter head 3 limits the filter plate 5.

[0022] For further details, please refer to Figure 2 , Figure 3 and Figure 4 As shown, the connecting block 10 is provided with a groove 14. The end of the limiting block 11 located in the groove 14 is fixedly connected to an abutment plate 15 extending out of the groove 14. A spring 16 is fixedly connected between the abutment plate 15 and the connecting block 10. By pushing the abutment plate 15 upward, the limiting block 11 can be engaged with the limiting groove 13. The end of the limiting block 11 near the fixing block 12 is provided with a guide surface 17. Therefore, during the installation process, only the filter plate 5 needs to be pressed inward, and the limiting block 11 will slide upward into the limiting block 13. When the limiting block 11 slides to the upper end of the limiting groove 13, the limiting block 11 will slide down under the action of the spring 16 and engage with the limiting groove 13 again.

[0023] For further details, please refer to Figure 2 and Figure 3 As shown, a baffle 7 for sealing the mounting port 4 is slidably installed on the filter head 3. By setting the baffle 7, when it is necessary to collect large dust particles, simply install the large-diameter filter plate 5 in the mounting port 4 at the top of the filter head 3, and then seal the multiple mounting ports 4 below with the baffle 7. This will allow the large dust particles to be collected smoothly and prevent dust from entering the filter head 3 through the mounting ports 4, thus avoiding any impact on the collected data. A cavity 18 is provided inside the mounting port 4, and the baffle 7 slides in conjunction with the cavity 18. A slot 19 is provided on the lower surface of the mounting port 4 to engage with the baffle 7. The engagement of the slot 19 with the baffle 7 ensures the sealing performance of the baffle 7.

[0024] For further details, please refer to Figure 2 and Figure 3 As shown, the filter head 3 is located at the upper end of the mounting port 4 and is provided with a slide groove 20 that communicates with the cavity 18. An adjustment block 21 that extends out of the slide groove 20 and slides with the slide groove 20 is fixedly connected to the baffle 7. The file can be moved up and down by sliding the adjustment block 21 up and down.

[0025] For details, please refer to Figure 2 , Figure 3 and Figure 4As shown, when large dust particles need to be collected, by applying force to the adjusting block 21, the baffle 7 in the uppermost mounting port 4 is slid upward into the cavity 18, and the large-diameter filter plate 5 is installed in the uppermost mounting port 4. At this time, the limiting block 11 is engaged with the limiting groove 13, thereby limiting the filter head 3 to the filter plate 5. When the force applied to the adjusting block 21 is released, the baffle 7 abuts against the mounting plate 8 of the filter plate 5, while the lower baffles 7 are engaged with the slots 19 under the action of gravity, thereby limiting the filter head 3. The sealing allows the filter head 3 to collect large dust particles smoothly. When it is necessary to collect small dust particles, the filter plates 5 are installed in the installation port 4 in descending order of pore size. After collection, simply apply force to the abutment plate 15 to move it upward, causing the limiting block 11 to separate from the limiting groove 13. Then pull the filter plate 5 outward to complete the disassembly of the filter plate 5. At this time, the baffle 7 will slide down under the action of gravity and re-engage with the slot 19.

[0026] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A filter membrane dust sampler, comprising a sampler (1) and a sampling head (2) mounted on the sampler (1), characterized in that: A filter membrane is installed inside the sampling head (2). A filter head (3) is threadedly connected to the sampling head (2). A plurality of longitudinally distributed mounting ports (4) are provided on the filter head (3). A filter plate (5) is installed inside the mounting port (4). A limiting mechanism (6) for limiting the position of the filter plate (5) is provided on the filter head (3). A baffle (7) for sealing the mounting port (4) is slidably installed on the filter head (3).

2. The membrane dust sampler according to claim 1, characterized in that: The filter plate (5) includes a mounting plate (8) that abuts against the mounting port (4) and a filter screen (9) fixedly connected to the mounting plate (8). When the mounting plate (8) is fitted into the mounting port (4), the filter screen (9) is located inside the sampler (1) and the edge of the filter screen (9) is in contact with the inner wall of the sampler (1). The limiting mechanism (6) includes a connecting block (10) fixedly connected to the mounting plate (8). A limiting block (11) is slidably connected inside the connecting block (10). A fixing block (12) is fixedly connected to the filter head (3). A limiting groove (13) that engages with the limiting block (11) is provided inside the fixing block (12).

3. The membrane dust sampler according to claim 2, characterized in that: The connecting block (10) is provided with a groove (14), and the end of the limiting block (11) located in the groove (14) is fixedly connected to an abutment plate (15) extending out of the groove (14), and a spring (16) is fixedly connected between the abutment plate (15) and the connecting block (10).

4. A membrane dust sampler according to claim 2, characterized in that: The limiting block (11) has a guide surface (17) at one end near the fixing block (12).

5. A membrane dust sampler (1) according to claim 1, characterized in that: The mounting port (4) is provided with a cavity (18), the baffle (7) is slidably engaged with the cavity (18), and the lower surface of the mounting port (4) is provided with a slot (19) that engages with the baffle (7).

6. A membrane dust sampler according to claim 5, characterized in that: The filter head (3) is provided with a slide groove (20) at the upper end of the mounting port (4) that communicates with the cavity (18). An adjustment block (21) that extends out of the slide groove (20) and slides with the slide groove (20) is fixedly connected to the baffle (7).

Images