An air sampling device for environmental monitoring

Abstract

The utility model discloses an air sampling device for environmental monitoring, comprising a sampling platform, wherein an air pump is fixed at the top center of the sampling platform, an adjusting unit is connected to the air inlet end of the air pump, a connecting pipe is arranged at the exhaust end of the air pump, the connecting pipe is in a "question mark" shaped structure, and air collecting units are arranged around the sampling platform, the air collecting units are composed of an air collecting cylinder, a guide rod, a piston plate, a limit block and a compression spring, five air collecting cylinders are arranged, and the air collecting cylinders are respectively arranged around the sampling platform, and air supply pipes are respectively arranged on the top of one side of the air collecting cylinder adjacent to the air pump, and the other ends of the air supply pipes are respectively connected to the connecting pipes. The air sampling device for environmental monitoring is simple and quick to operate, and sampling of air at different heights can be achieved by adjusting the height of the sampling head and coordinating the arrangement of multiple air collecting units. At the same time, its unique emptying mechanism also makes it easier to empty the collected air in the air collecting cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental monitoring, in particular to an air sampling device for environmental monitoring. Background Art

[0002] The existing air sampling devices have obvious deficiencies and cannot meet the needs of comprehensive and accurate monitoring of ambient air quality. Specifically, the existing sampling devices mainly have the following problems:

[0003] 1. Single sampling point. Traditional air sampling devices can usually only sample at a fixed location and cannot collect air samples from multiple locations at the same time, resulting in weak sampling representativeness and difficulty in fully reflecting the ambient air quality status;

[0004] 2. It is impossible to sample the air at different heights. Since the distribution of air pollutants at different heights is different, it is necessary to sample the air at different heights. However, the existing sampling devices often cannot flexibly adjust the sampling height and cannot meet the needs of air sampling at different heights.

[0005] 3. After air collection, the air in the gas collection bottle is not easy to be discharged. After collecting the air sample, the air in the gas collection bottle needs to be discharged for the next sampling. However, the existing sampling device often has difficulties in discharging air, and requires manual operation or the use of complex mechanical structures, which is cumbersome and inefficient.

[0006] In response to the above problems, we proposed an air sampling device for environmental monitoring. Utility Model Content

[0007] In view of the problems existing in the prior art, the utility model discloses an air sampling device for environmental monitoring, and the technical scheme adopted is that it comprises a sampling platform, an air pump is fixed at the top center of the sampling platform, an adjusting unit is connected to the air inlet end of the air pump, a connecting pipe is provided at the exhaust end of the air pump, and the connecting pipe is in a "question mark" shaped structure. Gas collecting units are respectively provided on the four sides of the sampling platform, and the gas collecting units are composed of a gas collecting cylinder, a guide rod, a piston plate, a limit block and a compression spring. There are five gas collecting cylinders, and the gas collecting cylinders are respectively arranged around the sampling platform. An air supply pipe is respectively provided on the top of one side of the gas collecting cylinder adjacent to the air pump, and the other end of the air supply pipe is respectively connected to the connecting pipe, and the top opposite end of the air supply pipe is respectively provided with Exhaust pipe, the exhaust pipes are respectively fixedly installed on the outer top of the gas collecting cylinder, the exhaust pipe and one end of the air supply pipe are respectively provided with a solenoid valve, the inner side of the gas collecting cylinder is respectively slidably installed with a piston plate, the bottom center of the piston plate is respectively fixedly installed with a guide rod, the bottom of the guide rod is respectively slidably installed in a sliding hole provided in the bottom center of the gas collecting cylinder, the outer side of the guide rod is respectively sleeved with a compression spring, the upper and lower ends of the compression spring are respectively fixedly connected with the bottom of the piston plate and the inner bottom of the gas collecting cylinder, a limiting block is respectively provided at the top center of the piston plate, the height of the limiting block is respectively greater than the pipe orifice diameter of the exhaust pipe and the air supply pipe, the top of the limiting block is respectively in active contact with the inner top of the gas collecting cylinder, and the limiting block limits the piston plate respectively.

[0008] As a preferred technical solution of the utility model, the adjustment unit is composed of an electric telescopic rod, a connecting plate, a fixed tube, a sealing tube and a gas sampling head. The fixed tube is fixedly installed at the exhaust end of the air pump, a sealing tube is slidably installed on the inner side of the fixed tube, and the top of the sealing tube is connected to the gas sampling head. The gas sampling head is arranged with filter holes in an array around the electric telescopic rod, and the electric telescopic rod is fixedly installed at the top right end of the sampling platform. The telescopic end of the electric telescopic rod is fixedly installed with a connecting plate, and the other end of the connecting plate is fixedly connected to the outer top of the sealing tube. By controlling the telescopic length of the electric telescopic rod, the connecting plate and the sealing tube are driven to slide up and down inside the fixed tube. Such a design allows the gas sampling head to be flexibly adjusted to different heights, thereby realizing the collection of air samples at different heights. In addition, the filter holes arranged in an array around the gas sampling head can effectively filter large particles of impurities in the air, ensuring the purity of the collected air samples.

[0009] As a preferred technical solution of the utility model, it also includes support legs, and the support legs are provided with two groups, and the support legs are respectively arranged at the left and right ends of the bottom of the sampling platform. The stability of the sampling platform is enhanced by the design of the support legs.

[0010] As a preferred technical solution of the utility model, a base is welded at the bottom of the support leg, and four universal wheels are arranged in an equidistant circular array at the bottom of the base. The design of the universal wheels makes the whole sampling device mobile and flexible.

[0011] As a preferred technical solution of the utility model, a pull rod is welded on the top right end of the sampling platform, and the pull rod is an inverted "L" structure.

[0012] As a preferred technical solution of the utility model, a controller is also included, the controller is arranged at the front end of the top surface of the sampling platform, the output end of the controller is electrically connected to the input end of the electric telescopic rod, the air pump and the solenoid valve, and the input end of the controller is electrically connected to the output end of the external power supply. Through the design of the controller, it is convenient for users to accurately control the electric telescopic rod, the air pump and the solenoid valve respectively.

[0013] Beneficial effects of the utility model: the utility model can adjust the height of the gas sampling head through the design of the electric telescopic rod and the connecting plate to achieve sampling of air at different heights. At the same time, with the setting of multiple gas collection units, it can collect air samples at multiple different positions, thereby greatly improving the representativeness of the sampling and making the collected air samples more comprehensive;

[0014] The air pump is one of the core components of the device. It can extract air at different heights through the adjustment unit. The extracted air is transported to the gas collecting cylinder through the connecting pipe and the air supply pipe. When the air enters the gas collecting cylinder, it will generate thrust on the piston plate, causing it to squeeze the compression spring. At the same time, the guide rod at the bottom of the piston plate will slide downward along the sliding hole at the center of the bottom of the gas collecting cylinder. The user can intuitively understand the gas collection state inside the gas collecting cylinder by observing the length of the guide rod extending downward. When the preset sampling volume is reached, the solenoid valve on the air supply pipe is closed to complete the air collection.

[0015] When the air sample collected in the air collecting cylinder needs to be transferred or emptied, it is only necessary to open the solenoid valve on the corresponding exhaust pipe. Under the elastic force of the compression spring, the piston plate will discharge the collected air to the outside.

[0016] In summary, the air sampling device for environmental monitoring is easy and quick to operate. By adjusting the height of the sampling head and coordinating the setting of multiple gas collecting units, it can achieve sampling of air at different heights. At the same time, its unique emptying mechanism also makes it easier to empty the collected air in the gas collecting cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2This is a schematic diagram of the structure of the utility model when viewed from above;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the utility model in a partial cross-section viewed from above;

[0021] Figure 5 It is a partial enlarged structural schematic diagram of point A of the utility model.

[0022] In the figure: 1. sampling platform; 2. supporting legs; 3. controller; 4. pull rod; 5. adjustment unit; 51. electric telescopic rod; 52. connecting plate; 53. fixing tube; 54. sealing tube; 55. gas sampling head; 6. gas collecting unit; 61. gas collecting cylinder; 62. guide rod; 63. piston plate; 64. limit block; 65. compression spring; 7. air pump; 8. connecting pipe; 9. air supply pipe; 10. exhaust pipe; 11. solenoid valve; 12. base; 13. universal wheel. DETAILED DESCRIPTION

[0023] Example 1

[0024] like Figures 1 to 5As shown, the utility model discloses an air sampling device for environmental monitoring, and the technical scheme adopted is that it comprises a sampling platform 1, an air pump 7 is fixed at the top center of the sampling platform 1, an adjusting unit 5 is connected to the air inlet end of the air pump 7, the adjusting unit 5 is composed of an electric telescopic rod 51, a connecting plate 52, a fixed tube 53, a sealing tube 54 and a gas sampling head 55, the fixed tube 53 is fixedly installed at the exhaust end of the air pump 7, a sealing tube 54 is slidably installed on the inner side of the fixed tube 53, a gas sampling head 55 is connected and installed on the top of the sealing tube 54, and filter holes are arranged in an array around the gas sampling head 55, the electric telescopic rod 51 is fixedly installed at the top right end of the sampling platform 1, a connecting plate 52 is fixedly installed at the telescopic end of the electric telescopic rod 51, and the other end of the connecting plate 52 is connected to the The outer top of the sealing tube 54 is fixedly connected, and the electric telescopic rod 51 is operated so that its telescopic end drives the sealing tube 54 connected thereto to slide on the inner side of the fixed tube 53 through the connecting plate 52. As the telescopic end of the electric telescopic rod 51 is extended or shortened, the height of the gas sampling head 55 is adjusted. This design allows the user to collect air samples at different heights according to different needs. The filter holes arranged in an array around the gas sampling head 55 can effectively filter out debris in the air, ensuring that the collected air samples are purer. It also includes support legs 2. The support legs 2 are provided with two groups. The support legs 2 are respectively arranged at the left and right ends of the bottom of the sampling platform 1. The support legs 2 can stably support the sampling platform 1. The bottom of the support legs 2 is welded with a base 12. The base 12 Four universal wheels 13 are arranged in an equidistant circular array at the bottom, a pull rod 4 is welded at the top right end of the sampling platform 1, and the pull rod 4 is an inverted "L" structure. The base 12 and the universal wheel 13 are arranged to facilitate the user to move the device through the pull rod 4, and a connecting pipe 8 is arranged at the exhaust end of the air pump 7, and the connecting pipe 8 is in a "question mark" shape. Gas collecting units 6 are arranged around the sampling platform 1, and the gas collecting unit 6 is composed of a gas collecting cylinder 61, a guide rod 62, a piston plate 63, a limit block 64 and a compression spring 65. There are five gas collecting cylinders 61, and the gas collecting cylinders 61 are respectively arranged around the sampling platform 1. An air supply pipe 9 is arranged on the top of one side of the gas collecting cylinder 61 adjacent to the air pump 7, and the other end of the air supply pipe 9 is connected to the connecting pipe 8, and the top of the air supply pipe 9 An exhaust pipe 10 is provided at the opposite end, and the exhaust pipe 10 is fixedly installed on the outer top of the air collecting cylinder 61. A solenoid valve 11 is provided at one end of the exhaust pipe 10 and the air supply pipe 9. A piston plate 63 is slidably installed on the inner side of the air collecting cylinder 61. A guide rod 62 is fixedly installed at the bottom center of the piston plate 63. The bottom of the guide rod 62 is slidably installed in a sliding hole provided at the bottom center of the air collecting cylinder 61. A compression spring 65 is sleeved on the outer side of the guide rod 62. The upper and lower ends of the compression spring 65 are fixedly connected to the bottom of the piston plate 63 and the inner bottom of the air collecting cylinder 61, respectively. The air pump 7 is operated so that the air inlet end thereof draws external air through the fixed tube 53 and the sealing tube 54. Then, the user can collect air samples according to their collection height.Open the solenoid valve 11 on the corresponding set of air supply pipes 9 and exhaust pipes 10 connected to the air collecting cylinder 61 on the sampling platform 1, so that the air pump 7 can transport the extracted air to the air collecting cylinder 61 through the connecting pipe 8 and the set of air supply pipes 9. After the residual air in the air collecting cylinder 61 is discharged, the solenoid valve 11 on the exhaust pipe 10 is closed. As the air pressure entering the air collecting cylinder 61 continues to increase, the air pushes the piston plate 63, causing the piston plate 63 to squeeze the compression spring 65, and the guide rod 62 at the bottom of the piston plate 63 slides downward along the sliding hole at the bottom center of the air collecting cylinder 61. The user can know the air collection state inside the air collecting cylinder 61 by observing the length of the guide rod 62 extending downward, and close the solenoid valve 11 on the air supply pipe 9 to complete the air collection. A limit block 64 is respectively set at the top center of the piston plate 63, and the height of the limit block 64 is respectively greater than the exhaust pipe 10 and the air supply pipe 9, the top of the limit block 64 is in active contact with the inner top of the air collecting cylinder 61, and the limit block 64 limits the piston plate 63 respectively. When the air sample collected in the air collecting cylinder 61 is transferred or emptied, the solenoid valve 11 on the exhaust pipe 10 connected to it can be opened. Under the action of the compression spring 65, the piston plate 63 discharges the collected air outward, and the height of the limit block 64 is respectively greater than the diameter of the exhaust pipe 10 and the pipe mouth of the air supply pipe 9, and the piston plate 63 is limited at the same time, so as to ensure that the air supply pipe 9 can smoothly send air into the air collecting cylinder 61 during the next collection process, and push the piston plate 63 downward. It also includes a controller 3, which is arranged at the front end of the top surface of the sampling platform 1, and the output end of the controller 3 is electrically connected to the input end of the electric telescopic rod 51, the air pump 7 and the solenoid valve 11, and the input end of the controller 3 is electrically connected to the output of the external power supply.

[0025] The working principle of the utility model is as follows: when in use, by pulling the pull rod 4, the universal wheel 13 at the bottom of the base 12 slides on the ground, so that the sampling platform 1 can be easily moved to a suitable sampling position. After the sampling platform 1 is moved to a suitable sampling position, first, the user can start the electric telescopic rod 51 through the controller 3. When the electric telescopic rod 51 is in operation, the telescopic end drives the sealing tube 54 connected to it to slide on the inner side of the fixed tube 53 through the connecting plate 52. As the telescopic end of the electric telescopic rod 51 extends or shortens, the height of the gas sampling head 55 is adjusted. This design allows the user to collect air samples at different heights according to different needs. In addition, the moving sampling head 55 can be adjusted to adjust the height of the gas sampling head 55. The sample table 1 can collect air samples at different positions. At the same time, the user starts the air pump 7 through the controller 3. The air pump 7 operates so that the air inlet end thereof draws external air through the fixed tube 53 and the sealing tube 54. The filter holes arranged in an array around the gas sampling head 55 can effectively filter large particles of dust or poplar fluff and other debris in the air, ensuring that the collected air sample is purer. Subsequently, the user can open the corresponding group of solenoid valves 11 on the air supply pipe 9 and the exhaust pipe 10 connected to the air collecting cylinder 61 on the sampling table 1 according to the collection height of the air sample, so that the air pump 7 can deliver the extracted air to the air collecting cylinder 61 through the connecting pipe 8 and the group of air supply pipes 9. The solenoid valve 11 on the exhaust pipe 10 is in an open state, so that the air initially entering the gas collecting cylinder 61 discharges the residual air in the gas collecting cylinder 61 to the outside through the exhaust pipe 10, and then the solenoid valve 11 on the exhaust pipe 10 is closed. As the air pressure entering the gas collecting cylinder 61 continues to increase, the air pushes the piston plate 63, causing the piston plate 63 to squeeze the compression spring 65, and the guide rod 62 at the bottom of the piston plate 63 slides downward along the sliding hole at the center of the bottom of the gas collecting cylinder 61. The user can know the gas collection state inside the gas collecting cylinder 61 by observing the length of the guide rod 62 extending downward. When the guide rod 62 no longer extends downward, the solenoid valve 11 on the air supply pipe 9 is closed. , thereby completing air collection; when sampling air at other heights or different positions, it can be carried out in the above manner, and different air collecting cylinders 61 can be selected to collect the air; when the air sample collected in the air collecting cylinder 61 is transferred or emptied, the solenoid valve 11 on the corresponding exhaust pipe 10 can be opened, and under the action of the compression spring 65, the piston plate 63 discharges the collected air outward, and the height of the limit block 64 is respectively greater than the pipe orifice diameter of the exhaust pipe 10 and the air supply pipe 9, and the piston plate 63 is limited at the same time, so as to ensure that the air supply pipe 9 can smoothly deliver the air into the air collecting cylinder 61 during the next collection process, and push the piston plate 63 downward.

[0026] The circuit connection involved in the utility model is a common means used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, and it belongs to the widely used existing technology.

[0027] Components not described in detail herein are prior art.

[0028] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the scope of protection of the present invention.

Claims

1. An air sampling device for environmental monitoring, comprising a sampling station (1), characterized in that: An air pump (7) is fixed at the top center of the sampling platform (1); an adjusting unit (5) is connected to the air inlet end of the air pump (7); a connecting pipe (8) is provided at the air outlet end of the air pump (7); the connecting pipe (8) is in the shape of a "question mark"; air collecting units (6) are respectively provided around the sampling platform (1); the air collecting units (6) are composed of an air collecting cylinder (61), a guide rod (62), a piston plate (63), a limit block (64) and a compression spring (65). The gas collecting cylinder (61) is composed of five gas collecting cylinders (61), which are respectively arranged on the four sides of the sampling platform (1), and the top of the gas collecting cylinder (61) adjacent to the air pump (7) is respectively provided with an air supply pipe (9), and the other end of the air supply pipe (9) is respectively communicated with the connecting pipe (8), and the opposite end of the top of the air supply pipe (9) is respectively provided with an exhaust pipe (10), and the exhaust pipe (10) is respectively fixedly installed on the outer top of the gas collecting cylinder (61), and one end of the exhaust pipe (10) and the gas supply pipe (9) is respectively provided with an electromagnetic valve (11), and the inner side of the gas collecting cylinder (61) is respectively slidably installed with a piston plate (63), and the bottom center of the piston plate (63) is respectively fixedly installed with a guide rod (62), and the bottom of the guide rod (62) is respectively slidably installed in a sliding hole provided in the bottom center of the gas collecting cylinder (61), and the outer side of the guide rod (62) is respectively provided with a compression spring (65), and the compression spring ( The upper and lower ends of the piston plate (65) are respectively fixedly connected to the bottom of the piston plate (63) and the inner bottom of the gas collecting cylinder (61); a limit block (64) is respectively arranged at the top center of the piston plate (63); the height of the limit block (64) is respectively greater than the diameter of the pipe opening of the exhaust pipe (10) and the air supply pipe (9); the top of the limit block (64) is respectively in active contact with the inner top of the gas collecting cylinder (61); and the limit block (64) limits the piston plate (63).

2. An air sampling device for environmental monitoring according to claim 1, characterized in that: The regulating unit (5) is composed of an electric telescopic rod (51), a connecting plate (52), a fixed tube (53), a sealing tube (54) and a gas sampling head (55); the fixed tube (53) is fixedly mounted on the exhaust end of the air pump (7); a sealing tube (54) is slidably mounted on the inner side of the fixed tube (53); the top end of the sealing tube (54) is connected to and mounted with a gas sampling head (55); filter holes are arranged in an array around the gas sampling head (55); the electric telescopic rod (51) is fixedly mounted on the top right end of the sampling platform (1); a connecting plate (52) is fixedly mounted on the telescopic end of the electric telescopic rod (51); the other end of the connecting plate (52) is fixedly connected to the outer top of the sealing tube (54).

3. The air sampling device for environmental monitoring according to claim 1, characterized in that: It also comprises support legs (2), wherein the support legs (2) are provided in two groups, and the support legs (2) are respectively arranged at the left and right ends of the bottom of the sampling platform (1).

4. An air sampling device for environmental monitoring according to claim 3, characterized in that: A base (12) is welded to the bottom of the support leg (2), and four universal wheels (13) are arranged in an equidistant circular array at the bottom of the base (12).

5. The air sampling device for environmental monitoring according to claim 1, characterized in that: A pull rod (4) is welded to the top right end of the sampling platform (1), and the pull rod (4) is an inverted "L" structure.

6. The air sampling device for environmental monitoring according to claim 1, characterized in that: The device also includes a controller (3), which is arranged at the front end of the top surface of the sampling platform (1), the output end of the controller (3) is electrically connected to the input end of the electric telescopic rod (51), the air pump (7) and the solenoid valve (11), and the input end of the controller (3) is electrically connected to the output end of an external power supply.

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