Adjustable particulate dust calibration device

Abstract

This utility model discloses an adjustable particulate matter dust calibration device. The calibration structure includes a pump body, a dust meter to be tested, and a reference dust meter. The air inlet of the pump body is connected to the experimental chamber, and the air outlet of the pump body is connected to the dust meter to be tested and the reference dust meter respectively. The mixing structure includes an air inlet pipe, which is sealed and extends through the experimental chamber. An external fan is connected to the inlet of the air inlet pipe. One end of the air inlet pipe extending into the experimental chamber is fitted with a Y-shaped exhaust pipe. The exhaust pipe and the air inlet pipe are rotatably connected and sealed by a bearing. A first gear is fixed on the exhaust pipe. The first gear meshes with a second gear, and the second gear is driven to rotate by a motor fixed outside the experimental chamber. This utility model can ensure the uniformity of mixing between particles and dust during the detection process, and ensure the accuracy of the data during calibration and detection.

Description

Technical Field

[0001] This utility model relates to the field of metrology and calibration equipment technology, specifically to an adjustable particulate matter dust calibration device. Background Technology

[0002] Currently, digital dust meters are widely used in indoor air quality monitoring, workplace air quality monitoring, mine dust concentration monitoring, and outdoor air quality monitoring. Traditional calibration equipment suffers from insufficient mixing of particulate dust within the chamber, significantly impacting the accuracy of the test results. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To overcome the shortcomings of existing technologies, an adjustable particulate matter dust calibration device is proposed to solve the problems mentioned in the background art.

[0005] (II) Technical Solution

[0006] This utility model is achieved through the following technical solution: This utility model proposes an adjustable particulate matter dust calibration device, including an experimental chamber with a dust inlet connected to a dust generating device. It also includes a calibration structure and a mixing structure. The calibration structure includes a pump body, a dust meter to be tested, and a reference dust meter. The pump body's air inlet is connected to the experimental chamber, and its air outlet is connected to both the dust meter to be tested and the reference dust meter. The mixing structure includes an air inlet pipe, which is sealed and extends through the experimental chamber. An external fan is connected to the inlet of the air inlet pipe. One end of the air inlet pipe extending into the experimental chamber is fitted with a Y-shaped exhaust pipe. The exhaust pipe and the air inlet pipe are rotatably connected and sealed via bearings. A first gear is fixed on the exhaust pipe, meshing with a second gear, which is driven to rotate by a motor fixed outside the experimental chamber.

[0007] Furthermore, the dust generating device is a dust aerosol generator.

[0008] Furthermore, the pump body is a vacuum pump.

[0009] Furthermore, the motor shaft of the motor extends into the experimental chamber and is sealed.

[0010] (III) Beneficial Effects

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] The adjustable particulate matter dust calibration device mentioned in this utility model can ensure the uniformity of mixing between particles and dust during the testing process, and ensure the accuracy of the data during calibration testing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] 1-Experimental chamber; 2-Dust inlet; 21-Dust generating device; 3-Pump body; 4-Dust meter to be tested; 5-Reference dust meter; 6-Air inlet pipe; 61-Fan; 7-Exhaust pipe; 71-First gear; 72-Second gear; 73-Motor. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] like Figure 1 An adjustable particulate matter dust calibration device is shown, comprising an experimental chamber 1, a dust inlet 2 connected to a dust generating device 21, a calibration structure, and a mixing structure. The calibration structure includes a pump body 3, a dust meter 4 to be tested, and a reference dust meter 5. The air inlet of the pump body 3 is connected to the experimental chamber 1, and the air outlet of the pump body 3 is connected to the dust meter 4 to be tested and the reference dust meter 5, respectively. The mixing structure includes an air inlet pipe 6, which is sealed and extends through the experimental chamber 1. An external fan 61 is connected to the inlet of the air inlet pipe 6. One end of the air inlet pipe 6 extending into the experimental chamber 1 is fitted with a Y-shaped exhaust pipe 7. The exhaust pipe 7 and the air inlet pipe 6 are rotatably connected and sealed by a bearing. A first gear 71 is fixed on the exhaust pipe 7. The first gear 71 meshes with a second gear 72, and the second gear 72 is driven to rotate by a motor 73 fixed outside the experimental chamber 1.

[0017] As a preferred embodiment, the dust generating device 21 employs a dust aerosol generator.

[0018] In a preferred embodiment, the pump body 3 is a vacuum pump.

[0019] In a preferred embodiment, the motor shaft of the motor 72 extends into the experimental chamber 1 and is sealed.

[0020] The adjustable particulate matter dust calibration device mentioned in this utility model has an adjustable air intake structure, which makes the particulate matter dust in the experimental chamber more uniformly mixed, ensuring the accuracy of comparative detection calibration.

[0021] Specifically, during use, the user can control the dust generator 21 in the control room to input particulate dust into the experimental chamber through the dust inlet 2. Then, by starting the fan 61, airflow is input through the air inlet 6 and diffused into the experimental chamber through the exhaust duct 7, ensuring uniform mixing of the particulate dust. The rotation of the exhaust duct 7, driven by the control motor 73, engages with the first gear 71, causing the exhaust duct 7 to rotate. This results in the two air outlets of the exhaust duct 7 rotating and diffusing the dust throughout the experimental chamber, ensuring thorough mixing of the particulate dust.

[0022] Then, the fan is turned off, and after a period of settling, the pump body 3 is started. The particulate dust is then extracted and fed into the dust meter 4 and the reference dust meter 5 at both ends of the air outlet. The test data are compared to perform calibration testing.

[0023] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. An adjustable particulate dust calibration device, comprising an experimental bin (1), wherein an inlet (2) is arranged on the experimental bin (1), and the inlet (2) is connected to a dust emission device (21), characterized in that: It also includes a calibration structure and a mixing structure. The calibration structure includes a pump body (3), a dust meter to be tested (4), and a reference dust meter (5). The air inlet of the pump body (3) is connected to the experimental chamber (1), and the air outlet of the pump body (3) is connected to the dust meter to be tested (4) and the reference dust meter (5) respectively. The mixing structure includes an air inlet pipe (6). The air inlet pipe (6) is sealed and penetrates the experimental chamber (1). The inlet of the air inlet pipe (6) is connected to an external fan (61). One end of the air inlet pipe (6) that extends into the experimental chamber (1) is fitted with a Y-shaped air duct (7). The air duct (7) and the air inlet pipe (6) are rotatably connected and sealed by a bearing. A first gear (71) is fixed on the air duct (7). The first gear (71) meshes with a second gear (72). The second gear (72) is driven to rotate by a motor (73) fixed outside the experimental chamber (1).

2. A tunable particulate dust calibration device according to claim 1, wherein: The dust generating device (21) is a dust aerosol generator.

3. The adjustable particulate matter dust calibration device of claim 1, wherein: The pump body (3) is a vacuum pump.

4. The adjustable particulate matter dust calibration device of claim 1, wherein: The motor shaft of the motor (73) extends into the experimental chamber (1) and is sealed.

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