Air sampling device for air detection

Abstract

The utility model discloses an air sampling device for air detection, which relates to the technical field of air detection and comprises a case and moving wheels, a sampling component and a mixing part are arranged in the case, the sampling component comprises a detection part, the detection part comprises a detection bin, a detection probe is arranged on the outer side of the detection bin, an exhaust pipe is fixedly mounted at the bottom of the detection bin, and the exhaust pipe is connected with the mixing part. A piston is arranged at the end, away from the exhaust pipe, of the detection bin, and the bottom of the piston is movably connected with an air plug. According to the air sampling device for air detection, the one-way valve on the exhaust pipe is opened, so that air in the detection bin is exhausted through the exhaust pipe, then after the one-way valve is closed, the air plug is driven by the piston to move in the detection bin, and therefore air pressure in the detection bin is gradually increased, and when the air pressure is completely larger than external air pressure, the detection bin is closed. And the air in the detection bin is completely discharged, so that the influence on subsequent air detection is avoided.

Description

Technical Field

[0001] This utility model relates to the field of air detection technology, and in particular to an air sampling device for air detection. Background Technology

[0002] As air pollution worsens, air quality detectors are used to sample and detect inhaled air in order to monitor air pollution levels. Air quality detection typically involves measuring various pollutants and components in the air.

[0003] An air sampling device is used to detect the components in the air. Chinese Patent CN216594396U discloses an air sampling device for environmental testing. By rotating a knob, a gear drives a rack, extending the sampling tube to sample air at different altitudes, improving sampling convenience and the accuracy of test results.

[0004] Air sampling devices typically draw outside air into a sampling chamber via a duct, and then use relevant detection probes in the sampling chamber to detect the drawn air and obtain air pollution data. However, when multiple air samples are required, the valve needs to be opened to discharge the previous batch of air, which can easily leave undetected air in the detection chamber and affect the detection accuracy. Utility Model Content

[0005] In view of the problem that the existing device, when sampling air multiple times, opens the valve to discharge the previous air, which easily results in residual undetected air in the detection chamber, affecting the detection accuracy, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide an air sampling device for air detection, which aims to increase the pressure in the detection chamber by moving the air plug in the chamber through the piston, thereby completely expelling the air in the detection chamber and avoiding any impact on subsequent air detection.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an air sampling device for air detection, comprising a chassis and casters, wherein the casters are located at the bottom of the chassis, and a sampling component and a mixing component are disposed in the chassis;

[0008] The sampling component includes a detection element, which includes a detection chamber. The detection chamber is fixedly installed inside the chassis, and a detection probe is provided on the outside of the detection chamber, with one end of the detection probe located inside the detection chamber.

[0009] An exhaust pipe is fixedly installed at the bottom of the detection chamber, a one-way valve is provided on the exhaust pipe, and a piston is provided at the end of the detection chamber opposite to the exhaust pipe.

[0010] One end of the piston protrudes from the bottom of the detection chamber, and an air plug is movably connected to the bottom of the piston, with the diameter of the air plug being the same as the inner diameter of the detection chamber.

[0011] In a preferred embodiment of the air sampling device for air detection according to the present invention, the detection component further includes a motor, which is fixedly mounted on the top of the housing. The output shaft of the motor is connected to a rotating wheel, and a connecting rod is hinged to the outer side of the rotating wheel. The other end of the connecting rod is hinged to the top of the piston.

[0012] As a preferred embodiment of the air sampling device for air detection according to the present invention, the sampling component further includes an adjusting component, the adjusting component includes an air pump, the air pump is fixedly installed inside the casing, the air pump is connected to a first air supply pipe, the other end of the first air supply pipe is located in the detection chamber, and a one-way valve is also provided on the first air supply pipe.

[0013] In a preferred embodiment of the air sampling device for air detection described in this utility model, the adjusting component further includes a sleeve, one end of which is fixedly installed with a first bend pipe, and a one-way valve is also provided on the first bend pipe. The sleeve communicates with the inside of the detection chamber through the first bend pipe.

[0014] In a preferred embodiment of the air sampling device for air detection described in this utility model, a second bend is provided on the inner side of the sleeve, and the second bend is movably connected in the sleeve by a limiting bolt.

[0015] In a preferred embodiment of the air sampling device for air detection described in this utility model, the second bend is provided with an extraction end at the end away from the first bend, and a filter end is provided at the other end of the second bend, wherein the filter end is located in the sleeve.

[0016] As a preferred embodiment of the air sampling device for air detection described in this utility model, the mixing component includes a standard gas tank, which is fixedly installed on the top of the chassis. The top of the standard gas tank is provided with an air injection port, and the bottom of the standard gas tank is connected to an air injection port. A second gas supply pipe and a flow meter are provided on the air injection port.

[0017] The beneficial effects of this utility model are:

[0018] 1. By opening the one-way valve on the exhaust pipe, the air in the detection chamber is discharged through the exhaust pipe. After the one-way valve is closed, the piston drives the air plug to move in the detection chamber, thereby gradually increasing the air pressure in the detection chamber. When the air pressure is completely greater than the external air pressure, the air in the detection chamber is completely discharged, thus avoiding any impact on subsequent air detection.

[0019] 2. By pulling the second bend out of the sleeve and fixing the second bend at the sleeve height with the limit bolt, and filtering the air through the extraction end and the filter end, the sampling requirements of air at different heights can be met.

[0020] 3. The special reaction gas in the standard gas tank is sent into the detection chamber through the second gas supply pipe for reaction, and the gas flow direction and rate are controlled by a one-way valve and a flow meter, thereby enabling the detection of special pollutants in the air. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 This is a schematic diagram of the overall structure of the air sampling device for air detection according to this utility model.

[0023] Figure 2 This is a cross-sectional structural schematic diagram of the air sampling device for air detection according to this utility model.

[0024] Figure 3 This is a schematic diagram of the sampling component structure of the air sampling device for air detection according to this utility model.

[0025] Figure 4 This is a cross-sectional structural diagram of the detection component of the air sampling device for air detection according to this utility model.

[0026] Figure 5 This is a schematic diagram of the exploded disassembly structure of the regulating component of the air sampling device for air detection according to this utility model.

[0027] Figure 6 This is a schematic diagram of the hybrid component structure of the air sampling device for air detection according to this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Chassis; 2. Casters; 3. Sampling assembly; 31. Detection component; 311. Detection chamber; 312. Detection probe; 313. Exhaust pipe; 314. One-way valve; 315. Piston; 316. Air plug; 317. Motor; 318. Rotary wheel; 319. Connecting rod; 32. Adjusting component; 321. Air pump; 322. First air supply pipe; 323. Sleeve; 324. First bend; 325. Second bend; 326. Limit bolt; 327. Extraction end; 328. Filter end; 4. Mixing component; 41. Standard gas tank; 42. Air injection port; 43. Second air supply pipe; 44. Flow meter. Detailed Implementation

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example 1

[0031] Reference Figure 1-6 This is the first embodiment of the present invention, providing an air sampling device for air detection. This air sampling device includes a housing 1 and casters 2. The casters 2 are located at the bottom of the housing 1. A sampling component 3 and a mixing component 4 are disposed within the housing 1. The sampling component 3 includes a detection component 31, which includes a detection chamber 311. The detection chamber 311 is fixedly installed inside the housing 1. A detection probe 312 is disposed on the outside of the detection chamber 311, with one end of the probe 312 located within the detection chamber 311. An exhaust pipe 313 is fixedly installed at the bottom of the detection chamber 311, and a one-way valve 314 is disposed on the exhaust pipe 313. A piston 315 is disposed at the end of the detection chamber 311 opposite to the exhaust pipe 313, with one end of the piston 315 protruding from the bottom of the detection chamber 311. An air plug 316 is movably connected to the bottom of the piston 315, and the air plug 316 is... The diameter of the inner ring of the detection chamber 311 is the same as that of the moving wheel 2, which can drive the housing 1 to move. The detection chamber 311 is a closed hollow canister structure. The detection probe 312 can detect the pollution of the air in the detection chamber 311 through its own electronic components. The exhaust pipe 313 can discharge the air in the detection chamber 311 during the detection, and the one-way valve 314 makes the air discharge direction unidirectional. The piston 315 can drive the air plug 316 to move in the detection chamber 311, thereby increasing the pressure in the detection chamber 311 and discharging all the undetected air in the detection chamber 311. During the exhaust stage, the one-way valve 314 of the exhaust pipe 313 remains open, and the piston 315 pushes the air plug 316 to completely discharge the gas. After the exhaust is completed, the one-way valve 314 closes, the piston 315 returns to its original position, and the detection chamber 311 enters a sealed state to await the next sampling.

[0032] The detection component 31 also includes a motor 317, which is fixedly mounted on the top of the housing 1. The output shaft of the motor 317 is connected to a rotating wheel 318. A connecting rod 319 is hinged to the outer side of the rotating wheel 318. The other end of the connecting rod 319 is hinged to the top of the piston 315. The output shaft of the motor 317 can drive the rotating wheel 318 to rotate under the constraint of the housing 1. When the rotating wheel 318 rotates, the connecting rod 319 makes a circular motion with the output shaft of the motor 317 as the center, so that the piston 315 drives the piston 315 to make a linear reciprocating motion in the housing 1, thereby continuously pressurizing the detection chamber 311.

[0033] The sampling assembly 3 also includes an adjusting component 32, which includes an air pump 321. The air pump 321 is fixedly installed inside the housing 1. A first air supply pipe 322 is connected to the air pump 321. The other end of the first air supply pipe 322 is located in the detection chamber 311. A one-way valve 314 is also provided on the first air supply pipe 322. When sampling, the air pump 321 can provide suction to the detection chamber 311 through the first air supply pipe 322, and the one-way valve 314 makes the flow direction of the suction move in one direction.

[0034] The adjusting component 32 also includes a sleeve 323. One end of the sleeve 323 is fixedly installed with a first bend 324 in the housing 1. A one-way valve 314 is also provided on the first bend 324. The sleeve 323 communicates with the inside of the detection chamber 311 through the first bend 324. Air in the sleeve 323 can enter the detection chamber 311 through the first bend 324. The one-way valve 314 on the first bend 324 can restrict the airflow direction in the first bend 324.

[0035] A second bend 325 is provided on the inner side of the sleeve 323. The second bend 325 is movably connected to the sleeve 323 by a limiting bolt 326. The length of the second bend 325 can vary in the sleeve 323, so that the device can sample air at different heights. The limiting bolt 326 can be threaded into the sleeve 323 and fix the second bend 325 when it contacts the second bend 325.

[0036] The second bend 325 is provided with an extraction end 327 at the end furthest from the first bend 324, and a filter end 328 at the other end furthest from the second bend 325. The filter end 328 is located in the sleeve 323. The extraction end 327 can perform preliminary filtration on the extracted air, and the filter end 328 can further filter the air in the second bend 325, thereby reducing the impact of dust in the air on the test results.

[0037] The mixing unit 4 includes a standard gas tank 41, which is fixedly installed on the top of the housing 1. The top of the standard gas tank 41 is provided with an air inlet 42, and the bottom of the standard gas tank 41 is connected to the air inlet 42. The air inlet 42 is provided with a second gas supply pipe 43 and a flow meter 44. The standard gas tank 41 is filled with a special reactive gas from the air in the detection chamber 311. The gas in the standard gas tank 41 can be discharged into the detection chamber 311 through the second gas supply pipe 43, thereby reacting with the air in the detection chamber 311 and cooperating with the detection probe 312 to complete the detection of the special gas. The one-way valve 314 and the flow meter 44 on the second gas supply pipe 43 can respectively limit the flow direction and flow rate of the special gas in the standard gas tank 41, thereby accurately detecting special pollutants in the air.

[0038] In use, the air pump 321 provides suction to the device, causing the first air supply pipe 322 to extract air from the air pump 321, reducing the pressure in the detection chamber 311. This allows external air to enter the detection chamber 311 through the first bend pipe 324 connected to the second bend pipe 325. The airflow direction is restricted by the second air supply pipe 43 and the one-way valve 314 on the first bend pipe 324. The second bend pipe 325 is pulled out of the sleeve 323 and fixed at the height of the sleeve 323 by the limiting bolt 326. The air is filtered by the extraction end 327 and the filter end 328 to meet the sampling requirements of air at different heights. The special reaction gas in the standard gas tank 41 is sent into the detection chamber 311 through the second air supply pipe 43 for reaction, and the gas flow is controlled by the one-way valve 314 and the flow meter 44. The flow direction and speed are controlled to detect specific pollutants in the air. When the next detection is needed, the one-way valve 314 on the exhaust pipe 313 is opened, allowing the air in the detection chamber 311 to be discharged through the exhaust pipe 313. After the one-way valve 314 is closed, the piston 315 drives the air plug 316 to move in the detection chamber 311, thereby gradually increasing the air pressure in the detection chamber 311. When the pressure is completely greater than the external air pressure, the air in the detection chamber 311 is completely discharged, thus avoiding any impact on subsequent air detection. During this process, the output shaft of the motor 317 drives the rotating wheel 318 to rotate, causing the connecting rod 319, which moves in a circular motion around the rotating wheel 318, to drive the air plug 316 connected to the piston 315 to make linear reciprocating motion in the detection chamber 311, thereby continuously pressurizing the air in the detection chamber 311.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An air sampling device for air detection, comprising a housing (1) and casters (2), wherein the casters (2) are located at the bottom of the housing (1), characterized in that: The chassis (1) is equipped with a sampling component (3) and a mixing component (4); The sampling component (3) includes a detection element (31), the detection element (31) includes a detection chamber (311), the detection chamber (311) is fixedly installed on the inside of the chassis (1), and a detection probe (312) is provided on the outside of the detection chamber (311), with one end of the detection probe (312) located in the detection chamber (311); An exhaust pipe (313) is fixedly installed at the bottom of the detection chamber (311), a one-way valve (314) is provided on the exhaust pipe (313), and a piston (315) is provided at the end of the detection chamber (311) away from the exhaust pipe (313). One end of the piston (315) protrudes from the bottom of the detection chamber (311), and an air plug (316) is movably connected to the bottom of the piston (315), and the diameter of the air plug (316) is the same as the inner diameter of the detection chamber (311).

2. The air sampling device for air detection according to claim 1, characterized in that: The detection component (31) also includes a motor (317), which is fixedly installed on the top of the housing (1). The output shaft of the motor (317) is connected to a rotating wheel (318). A connecting rod (319) is hinged to the outside of the rotating wheel (318), and the other end of the connecting rod (319) is hinged to the top of the piston (315).

3. An air sampling device for air detection according to claim 1, characterized in that: The sampling component (3) also includes an adjusting component (32), which includes an air pump (321). The air pump (321) is fixedly installed inside the housing (1). A first air supply pipe (322) is connected to the air pump (321). The other end of the first air supply pipe (322) is located in the detection chamber (311). A one-way valve (314) is also provided on the first air supply pipe (322).

4. An air sampling device for air detection according to claim 3, characterized in that: The adjusting component (32) also includes a sleeve (323), one end of which is fixedly installed with a first bend (324) in the housing (1). A one-way valve (314) is also provided on the first bend (324). The sleeve (323) communicates with the inside of the detection chamber (311) through the first bend (324).

5. An air sampling device for air detection according to claim 4, characterized in that: The inner side of the sleeve (323) is provided with a second bend (325), which is movably connected in the sleeve (323) by a limiting bolt (326).

6. An air sampling device for air detection according to claim 5, characterized in that: The second bend (325) is provided with an extraction end (327) at one end away from the first bend (324), and a filter end (328) is provided at the other end of the second bend (325), the filter end (328) being located in the sleeve (323).

7. An air sampling device for air detection according to claim 1, characterized in that: The mixing component (4) includes a standard gas tank (41), which is fixedly installed on the top of the chassis (1). The top of the standard gas tank (41) is provided with an air inlet (42), and the bottom of the standard gas tank (41) is connected to the air inlet (42). A second gas supply pipe (43) and a flow meter (44) are provided on the air inlet (42).

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