Air suspended particulate matter sampling device

Abstract

The utility model discloses an air suspended particulate matter sampling device, which relates to the technical field of air sampling and comprises a protective box body, a group of self-locking universal wheels are mounted on the bottom surface of the protective box body, an access door is mounted on the front surface of the protective box body, and a negative pressure component is mounted in the protective box body. Through cooperative arrangement of a protection box body, a negative pressure assembly, a rotating seat, a mounting hole, a sampling cylinder, a filter membrane I, a filter membrane II, a filter membrane III and a rotating assembly, air can enter the sampling cylinder by utilizing the negative pressure assembly, suspended particulate matters in the air can be blocked by the filter membrane I, the filter membrane II and the filter membrane III, and the air is prevented from entering the sampling cylinder. The sampling device has the advantages that the sampling device is simple in structure and convenient to use, the channeling volcanic particles in the air can be conveniently sampled, the rotating seat can be driven to rotate by utilizing the rotating assembly, so that other sampling cylinders are matched with the negative pressure assembly, a plurality of samples can be conveniently and automatically collected, the use convenience of the sampling device can be improved, and the use effect of the sampling device can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of air sampling, in particular to an air suspended particulate matter sampling device. Background Art

[0002] Air suspended particulate matter refers to solid and liquid particulate substances floating in the air. It mainly comes from soot generated during fuel combustion, dust generated during production and processing, construction and traffic dust, etc. These particulate matters contain a large amount of impurity substances, and many of them are toxic substances that can cause harm to the human body. Suspended particulate matter enters the human body through the respiratory tract, stimulating and damaging the airway and lung tissues, and may lead to acute and chronic bronchitis, asthma attacks, etc. Air suspended particulate matter has an important impact on human health and environmental quality. With the continuous advancement of the industrialization process, air pollution is becoming increasingly severe. Therefore, it is crucial to take effective measures to reduce its emission and diffusion. To understand the air quality in various places, it is necessary to regularly collect air at each detection point. When sampling air suspended particulate matter, a suspended particulate matter sampling device is required.

[0003] According to the patent with application number 201921781244.2, an air suspended particulate matter sampling device is disclosed, which relates to the field of environmental monitoring sampling equipment. It includes a box body, and an air inlet mechanism is connected to the top wall of the box body. A negative pressure mechanism is fixed inside the box body. The negative pressure mechanism includes an air pump, and the air pump is provided with an air outlet. The air inlet mechanism includes an air inlet pipe passing through the top wall of the box body and connected to the negative pressure mechanism. The other end of the air inlet pipe is connected to a communication pipe. The communication pipe includes several branch pipes. The end of the branch pipe away from the air inlet pipe is connected to a sub-air inlet pipe. The end of the sub-air inlet pipe is connected to a sampling head, and a filter membrane is placed in the internal cavity of the sampling head.

[0004] Adopting the above solution, multiple samples can be collected simultaneously. When samples need to be collected at intervals at the same monitoring site, the user only needs to selectively sample by opening and closing the sampling head valve, which is simple to operate and has higher efficiency. However, the above solution still has certain defects when in use. When using the above solution, the user needs to close the sampling head valve to collect multiple samples, and it is not possible to automatically collect multiple samples, which affects the convenience of use of the sampling device and thus affects the use effect of the sampling device. Therefore, we provide an air suspended particulate matter sampling device to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and provide an air suspended particulate matter sampling device.

[0006] To achieve the above object, the present utility model provides the following technical solutions: An air suspended particulate matter sampling device, comprising a protective box body, a set of self-locking universal wheels are installed on the bottom surface of the protective box body, a maintenance door is installed on the front surface of the protective box body, a negative pressure component is installed inside the protective box body, a rotating seat is arranged on the upper surface of the protective box body, a set of mounting holes are opened on the upper surface of the rotating seat, a sampling cylinder is placed inside each mounting hole, two mounting components are installed between each sampling cylinder and the rotating seat, a shielding plate is arranged above each sampling cylinder, a set of connecting columns are installed on the bottom surface of each shielding plate, and the bottom end of the connecting column is connected to the upper surface of the sampling cylinder, a sealing ring is installed on the bottom surface of each sampling cylinder, and the sealing ring is in contact with the inner bottom wall of the mounting hole, a filter membrane I is installed inside each sampling cylinder, a filter membrane II is installed inside each sampling cylinder, a filter membrane III is installed inside each sampling cylinder, and a rotating component is arranged outside the rotating seat.

[0007] Preferably, the negative pressure component includes an air extraction pump installed on the inner bottom wall of the protective box body and a set of air outlet holes opened on the outer surface of the protective box body, and the output end of the air extraction pump is fixedly communicated with an air outlet pipe.

[0008] Preferably, the input end of the air extraction pump is fixedly communicated with an air extraction pipe, the top end of the air extraction pipe is fixedly communicated with a connecting pipe, and the connecting pipe is embedded in the inner top wall of the protective box body.

[0009] Preferably, the mounting component includes a connecting block fixedly connected to the outer surface of the sampling cylinder, and a limiting groove is opened on the upper surface of the connecting block.

[0010] Preferably, the mounting component further includes an L-shaped plate installed on the upper surface of the rotating seat, a threaded rod is threadedly connected to the upper surface of the L-shaped plate, a rotating block is installed at the top end of the threaded rod, the bottom end of the threaded rod is rotatably connected to a limiting plate, and the limiting plate is located inside the limiting groove.

[0011] Preferably, a guiding groove is opened on the outer surface of the connecting block, a guiding block is slidably connected to the inner wall of the guiding groove, and the guiding block is connected to the limiting plate.

[0012] Preferably, the rotating component includes a bracket fixedly connected to the inner top wall of the protective box body, a servo motor is fixedly embedded in the inner wall of the bracket, an output end of the servo motor is installed with a rotating rod, and the top end of the rotating rod is connected to the bottom surface of the rotating seat.

[0013] Preferably, the rotating component further includes an annular sliding groove opened on the upper surface of the protective box body, a set of arc-shaped sliding blocks are slidably connected to the inner wall of the annular sliding groove, and the arc-shaped sliding blocks are connected to the rotating seat.

[0014] Beneficial effects:

[0015] Compared with the prior art, the air suspended particulate matter sampling device has the following beneficial effects:

[0016] First, through the cooperation of the protective box body, negative pressure component, rotating seat, mounting hole, sampling cylinder, filter membrane 1, filter membrane 2, filter membrane 3 and rotating component, the negative pressure component can make air enter the sampling cylinder. The suspended particulate matter in the air can be blocked by filter membrane 1, filter membrane 2 and filter membrane 3, which is convenient for sampling the suspended particulate matter in the air. The rotating component can drive the rotating seat to rotate, so that other sampling cylinders are adapted to the negative pressure component, which is convenient for automatically collecting multiple samples, improving the use convenience of the sampling device, and thus ensuring the use effect of the sampling device.

[0017] Second, through the cooperation of the protective box body, rotating seat, sampling cylinder, air extraction pump, air outlet pipe, air outlet hole, air extraction pipe, connecting pipe, bracket, servo motor, rotating rod, annular sliding groove and arc-shaped slider, when the air extraction pump works, the air in the air extraction pipe and the connecting pipe can be extracted through the air outlet pipe, so that the external air enters the sampling cylinder, and the suspended matter in the air is blocked by filter membrane 1, filter membrane 2 and filter membrane 3, which is convenient for sampling the suspended particulate matter. When the servo motor works, it can drive the rotating seat to rotate under the guidance of the annular sliding groove and the arc-shaped slider through the rotating rod, so that another sampling cylinder rotates above the connecting pipe and is connected to the inside of the connecting pipe, which is convenient for using another sampling cylinder to sample the air, thus realizing the automatic conversion of the sampling cylinder and enabling the device to automatically collect multiple samples. Description of the drawings

[0018] Figure 1 is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 is an internal structural diagram of the protective box body of the present invention;

[0020] Figure 3 is a three-dimensional structural diagram of the rotating seat of the present invention;

[0021] Figure 4 is an internal structural diagram of the sampling cylinder of the present invention;

[0022] Figure 5 is a three-dimensional structural diagram of the mounting component of the present invention.

[0023] In the figure: 1. Protective box body; 2. Self-locking universal wheels; 3. Maintenance door; 4. Negative pressure assembly; 401. Air extraction pump; 402. Air outlet pipe; 403. Air outlet holes; 404. Air extraction pipe; 405. Connecting pipe; 5. Rotating seat; 6. Mounting holes; 7. Sampling cylinder; 8. Mounting assembly; 801. Connecting block; 802. Limiting groove; 803. L-shaped plate; 804. Threaded rod; 805. Rotating block; 806. Limiting plate; 807. Guide groove; 808. Guide block; 9. Baffle plate; 10. Connecting column; 11. Sealing ring; 12. First filter membrane; 13. Second filter membrane; 14. Third filter membrane; 15. Rotating assembly; 151. Bracket; 152. Servo motor; 153. Rotating rod; 154. Annular sliding groove; 155. Arc-shaped sliding block. Detailed implementation manners

[0024] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0025] See Figures 1 to 5 , an air suspended particulate matter sampling device, including a protective box body 1. A group of self-locking universal wheels 2 are installed on the bottom surface of the protective box body 1. The number of self-locking universal wheels 2 is four, and each self-locking universal wheel 2 is respectively located at the four corners of the bottom surface of the protective box body 1. By using the provided self-locking universal wheels 2, it is convenient to move and fix the device, facilitating the use of the device.

[0026] A maintenance door 3 is installed on the front surface of the protective box body 1. The maintenance door 3 is hinged to the protective box body 1 through a hinge. A handle is installed on the front surface of the protective box body 1, which can facilitate opening the maintenance door 3 and facilitate the maintenance of the interior of the protective box body 1.

[0027] A negative pressure assembly 4 is installed inside the protective box body 1. The negative pressure assembly 4 includes an air extraction pump 401 installed on the inner bottom wall of the protective box body 1 and a group of equally spaced air outlet holes 403 opened on the outer surface of the protective box body 1. The output end of the air extraction pump 401 is fixedly connected to an air outlet pipe 402. When the air extraction pump 401 works, it can extract air through the air outlet pipe 402, enabling the air discharged from the air outlet pipe 402 to be discharged to the outside of the protective box body 1 through the air outlet holes 403, facilitating the use of the device.

[0028] The input end of the air extraction pump 401 is fixedly connected to an air extraction pipe 404. The top end of the air extraction pipe 404 is fixedly connected to a connecting pipe 405, and the connecting pipe 405 is embedded in the inner top wall of the protective box body 1. When the air extraction pump 401 works, it can extract the air inside the air extraction pipe 404 and the connecting pipe 405 through the air outlet pipe 402, enabling a negative pressure to be generated inside the connecting pipe 405, so that external air can enter the inside of the connecting pipe 405 through the sampling cylinder 7, facilitating the subsequent sampling of suspended particulate matter in the air.

[0029] A rotating seat 5 is provided on the upper surface of the protective box body 1. A group of mounting holes 6 are formed on the upper surface of the rotating seat 5. A sampling cylinder 7 is placed inside each mounting hole 6. The position of one of the mounting holes 6 corresponds to the position of the communicating pipe 405. Installing the sampling cylinder 7 into the mounting hole 6 can make the sampling cylinder 7 communicate with the communicating pipe 405, which is convenient for sampling suspended particulate matter in the air.

[0030] A shielding plate 9 is provided above each sampling cylinder 7. A group of connecting columns 10 arranged in a circular array are installed on the bottom surface of each shielding plate 9, and the bottom ends of the connecting columns 10 are connected to the upper surface of the sampling cylinder 7. By using the provided connecting columns 10, the shielding plate 9 can be supported. The shielding plate 9 can shield the top end of the sampling cylinder 7 to prevent foreign objects from entering the sampling cylinder 7.

[0031] A sealing ring 11 is installed on the bottom surface of each sampling cylinder 7, and the sealing ring 11 is in contact with the inner bottom wall of the mounting hole 6. By using the provided sealing ring 11, the sealing performance between the mounting hole 6 and the sampling cylinder 7 can be ensured. A first filter membrane 12 is installed inside each sampling cylinder 7, a second filter membrane 13 is installed inside each sampling cylinder 7, and a third filter membrane 14 is installed inside each sampling cylinder 7. By using the provided first filter membrane 12, second filter membrane 13 and third filter membrane 14, suspended particulate matter with different particle sizes can be filtered and blocked, different particle sizes of suspended particulate matter can be collected simultaneously, and the working efficiency of the device can be improved.

[0032] Two symmetrically arranged mounting components 8 are installed between each sampling cylinder 7 and the rotating seat 5. The mounting component 8 includes a connecting block 801 fixedly connected to the outer surface of the sampling cylinder 7. A limiting groove 802 is formed on the upper surface of the connecting block 801. The mounting component 8 further includes an L-shaped plate 803 installed on the upper surface of the rotating seat 5. A threaded rod 804 is threadedly connected to the upper surface of the L-shaped plate 803. A rotating block 805 is installed at the top end of the threaded rod 804. The bottom end of the threaded rod 804 is rotatably connected to a limiting plate 806, and the limiting plate 806 is located inside the limiting groove 802. The bottom end of the threaded rod 804 is rotatably connected to the upper surface of the limiting plate 806 through a bearing. A circle of anti-slip lines is formed on the outer surface of the rotating block 805. Rotating the rotating block 805 can drive the threaded rod 804 to rotate. The rotation of the threaded rod 804 can make the limiting plate 806 move downward, so that the limiting plate 806 can move into the limiting groove 802 to limit the connecting block 801, thereby facilitating the installation of the sampling cylinder 7. A guiding groove 807 is formed on the outer surface of the connecting block 801. A guiding block 808 is slidably connected to the inner wall of the guiding groove 807, and the guiding block 808 is connected to the limiting plate 806.

[0033] When the threaded rod 804 drives the limiting plate 806 to move, the guiding block 808 can slide on the inner wall of the guiding groove 807, guiding and limiting the limiting plate 806, and ensuring the stability of the limiting plate 806 during movement.

[0034] A rotating assembly 15 is arranged outside the rotating seat 5. The rotating assembly 15 includes a bracket 151 fixedly connected to the inner top wall of the protective box body 1. A servo motor 152 is fixedly embedded in the inner wall of the bracket 151. The output end of the servo motor 152 is provided with a rotating rod 153, and the top end of the rotating rod 153 is connected to the bottom surface of the rotating seat 5.

[0035] By using the provided bracket 151, the servo motor 152 can be conveniently carried. A bearing is fixedly embedded in the inner top wall of the protective box body 1. The top end of the rotating rod 153 penetrates through the bearing and extends above the protective box body 1, and the outer surface of the rotating rod 153 is connected to the inner ring of the bearing. The servo motor 152 is equipped with a dedicated controller, which can control the output end of the servo motor 152 to rotate precisely, rotating only one-sixth of a circle each time, so that the rotating rod 153 can conveniently drive the rotating seat 5 to rotate one-sixth of a circle each time, enabling each sampling cylinder 7 to be adapted to the communicating pipe 405 during rotation.

[0036] The rotating assembly 15 further includes an annular sliding groove 154 opened on the upper surface of the protective box body 1. A group of arc-shaped sliding blocks 155 arranged in a circumferential array are slidably connected to the inner wall of the annular sliding groove 154, and the arc-shaped sliding blocks 155 are connected to the rotating seat 5.

[0037] When the servo motor 152 drives the rotating seat 5 to rotate through the rotating rod 153, the arc-shaped sliding blocks 155 can slide on the inner wall of the annular sliding groove 154, guiding and limiting the rotating seat 5, and ensuring the stability of the rotating seat 5 during rotation.

[0038] Working principle: When the device is in use, first move the device to the sampling position for use. After placing the sampling cylinder 7 to be sampled inside the mounting hole 6, rotate the sampling cylinder 7 to a certain extent so that the connecting block 801 can be located below the limiting plate 806. Then rotate the rotating block 805. The rotating block 805 can drive the threaded rod 804 to rotate. By using the thread fit between the threaded rod 804 and the L-shaped plate 803, the rotation of the threaded rod 804 can cause the limiting plate 806 to move under the guidance of the guide groove 807 and the guide block 808, and the limiting plate 806 can be moved into the limiting groove 802 to limit the connecting block 801, thus facilitating the installation of the sampling cylinder 7 and the use of the sampling cylinder 7. When sampling airborne particulate matter, first start the air pump 401. The operation of the air pump 401 can extract the air inside the air extraction pipe 404 and the communication pipe 405 through the air outlet pipe 402, which can create a negative pressure inside the communication pipe 405. As a result, external air can enter the communication pipe 405 through the sampling cylinder 7, and the suspended substances in the air can be blocked by the first filter membrane 12, the second filter membrane 13, and the third filter membrane 14, facilitating the sampling of airborne particulate matter. When multiple samples need to be collected, first control the servo motor 152 to work through the controller. The operation of the servo motor 152 can drive the rotating seat 5 to rotate under the guidance of the annular sliding groove 154 and the arc-shaped slider 155 through the rotating rod 153, enabling another sampling cylinder 7 to rotate above the communication pipe 405 and making another sampling cylinder 7 communicate with the inside of the communication pipe 405, facilitating the use of another sampling cylinder 7 to sample air. Thus, the automatic conversion of the sampling cylinder 7 can be achieved, enabling the device to automatically collect multiple samples.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An airborne particle sampling device, comprising a protective box (1), characterized in that: The protective box (1) is provided with an inspection door (3), a negative pressure assembly (4) is installed inside the protective box (1), a rotating seat (5) is provided on the upper surface of the protective box (1), a group of mounting holes (6) are opened on the upper surface of the rotating seat (5), a sampling cylinder (7) is placed inside each of the mounting holes (6), two mounting assemblies (8) are installed between each of the sampling cylinders (7) and the rotating seat (5), and a rotating assembly (15) is provided outside the rotating seat (5).

2. The airborne particulate matter sampling device according to claim 1, characterized in that: A baffle plate (9) is arranged above each sampling tube (7), a group of connecting columns (10) are installed on the bottom surface of each baffle plate (9), and the bottom end of the connecting column (10) is connected to the upper surface of the sampling tube (7), a sealing ring (11) is installed on the bottom surface of each sampling tube (7), and the sealing ring (11) is in contact with the inner bottom wall of the mounting hole (6), and a filter membrane 1 (12), a filter membrane 2 (13), and a filter membrane 3 (14) are installed inside each sampling tube (7).

3. The airborne particulate matter sampling device according to claim 2, characterized in that: The negative pressure component (4) comprises an air pump (401) installed on the inner bottom wall of the protective box (1) and a group of air outlet holes (403) opened on the outer surface of the protective box (1), and the output end of the air pump (401) is fixedly connected to an air outlet pipe (402).

4. The airborne particulate matter sampling device according to claim 3, characterized in that: The input end of the air extraction pump (401) is fixedly connected to an air extraction pipe (404), the top end of the air extraction pipe (404) is fixedly connected to a connecting pipe (405), and the connecting pipe (405) is embedded in the inner top wall of the protective box (1).

5. The airborne particulate matter sampling device according to claim 2, characterized in that: The mounting assembly (8) comprises a connection block (801) fixedly connected to the outer surface of the sampling cylinder (7), and a limiting groove (802) is provided on the upper surface of the connection block (801).

6. The airborne particulate matter sampling device according to claim 5, characterized in that: The mounting assembly (8) further comprises an L-shaped plate (803) mounted on the upper surface of the rotating seat (5); the upper surface of the L-shaped plate (803) is threadedly connected to a threaded rod (804); a rotating block (805) is mounted on the top end of the threaded rod (804); the bottom end of the threaded rod (804) is rotatably connected to a limiting plate (806), and the limiting plate (806) is located inside the limiting groove (802).

7. The airborne particulate matter sampling device according to claim 6, characterized in that: The outer surface of the connecting block (801) is provided with a guide groove (807), the inner wall of the guide groove (807) is slidably connected with a guide block (808), and the guide block (808) is connected to the limiting plate (806).

8. The airborne particulate matter sampling device according to claim 2, characterized in that: The rotating assembly (15) comprises a bracket (151) fixedly connected to the inner top wall of the protective box (1), a servo motor (152) is fixedly embedded in the inner wall of the bracket (151), a rotating rod (153) is installed at the output end of the servo motor (152), and the top end of the rotating rod (153) is connected to the bottom surface of the rotating seat (5).

9. The airborne particulate matter sampling device according to claim 8, characterized in that: The rotating assembly (15) further comprises an annular slide groove (154) formed on the upper surface of the protective box (1), the inner wall of the annular slide groove (154) being slidably connected to a group of arc-shaped sliding blocks (155), and the arc-shaped sliding blocks (155) are connected to the rotating seat (5).

Images