A field calibration device for large flow air samplers

Abstract

The utility model discloses an on-site calibration device for a large-flow air sampler, which specifically relates to the technical field of air sampling, including a collection box, an air tank and an air pump. A retractable and adjustable air intake assembly is provided on one side of the collection box, and the air intake assembly includes an air intake pipe, an adjusting bolt and an extension pipe. A base is installed at the bottom end of one side of the collection box, and an air intake pipe is installed at the top of the base. An adjusting platform is fixed at the top of one side of the air intake pipe, and an adjusting bolt is provided inside the adjusting platform. An extension pipe is provided inside the air intake pipe, and an orifice flow calibrator is installed at the top of the extension pipe. The utility model is provided with an air intake pipe and an extension pipe, and after the adjusting bolt at the side end of the air intake pipe is loosened, the position of the inner extension pipe can be manually adjusted upward, so that the height of the air intake end can be adjusted, thereby realizing the convenience of adjusting the height of the air intake end of the on-site calibration device for a large-flow air sampler.

Description

Technical Field

[0001] The utility model relates to the technical field of air sampling, in particular to an on-site calibration device for a large-flow air sampler. Background Art

[0002] The gas sampler is generally composed of three parts: collector, flow meter and air extraction power control system. The flow meter calibration device refers to a standard volume flow device that performs real liquid calibration on the flow meter in use to determine the instrument coefficient and accuracy of the flow meter. The calibration equipment includes fixed or mobile standard volume tubes, standard flow meters, etc.

[0003] When the large-flow air sampler field calibration device is in use, its air inlet is installed around the device for use. Later, if its height needs to be adjusted, it is inconvenient, so it needs to be improved to make it more convenient to use. Utility Model Content

[0004] The utility model aims to provide a field calibration device for a large-flow air sampler, so as to solve the problem in the above-mentioned background technology that it is inconvenient to adjust the height position of the air inlet end of the field calibration device for a large-flow air sampler.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an on-site calibration device for a large-flow air sampler, comprising a collection box, an air tank and an air pump, a retractable and adjustable air intake assembly is arranged on one side of the collection box, the air intake assembly comprises an air intake pipe, an adjusting bolt and an extension tube, a base is installed at the bottom end of one side of the collection box, an air intake pipe is installed at the top of the base, an adjusting platform is fixed at the top of one side of the air intake pipe, an adjusting bolt is arranged inside the adjusting platform, an extension tube is arranged inside the air intake pipe, and an orifice flow calibrator is installed at the top of the extension tube.

[0006] Preferably, a machine box is installed on one side of the collection box, and an air tank is provided on the other side of the collection box.

[0007] Preferably, a weighing platform is installed at the bottom end of the collection box, and a gas tank is provided at the top end of the weighing platform.

[0008] Preferably, an exhaust port is installed at the top end of the gas tank, and a threaded cap is arranged on the outside of the exhaust port.

[0009] Preferably, an air inlet is installed at the bottom end of one side of the gas tank, and a connecting sleeve is installed on one side of the air inlet.

[0010] Preferably, a connecting head is provided inside the connecting sleeve, a tail ring is installed on one side of the connecting head, a sealing head is movably installed on the inner side of the tail ring, and a connecting pipe is installed on one side of the sealing head.

[0011] Preferably, an air pump is installed at the bottom end of the connecting pipe, and an air suction pipe is installed on one side of the air pump.

[0012] Preferably, a limiting ring is provided on the outer side of the gas tank, a fixing platform is fixed on one side of the limiting ring, a fixing bolt is provided on the inner side of the fixing platform, one side of the fixing bolt extends to the inner side of the limiting ring, a pressure plate is movably installed on one side of the fixing bolt, and a cushion is fixed on one side of the pressure plate.

[0013] Compared with the prior art, the utility model has the following beneficial effects: by providing an air intake pipe and an extension pipe, after the adjustment bolt at the side end of the air intake pipe is loosened, the position of the inner extension pipe can be manually adjusted upward, so that the height of the air intake end can be adjusted, thereby realizing the convenience of adjusting the height of the air intake end of the field calibration device of the large-flow air sampler;

[0014] By providing a connecting sleeve and a connecting head, the connecting sleeve is located at the side end of the air inlet. When in use, the connecting head at the side end of the connecting pipe can be inserted into the inner side of the connecting sleeve, and the connecting head can be rotated. The thread on the surface of the connecting head cooperates with the thread inside the connecting sleeve, and the connection operation can be performed, thereby realizing the convenience of connecting the connecting pipe of the large-flow air sampler on-site calibration device to the air inlet.

[0015] By setting a limiting ring and a pressure plate, when in use, the gas tank can be inserted into the inner side of the limiting ring, and the gas tank can be limited with the help of the limiting ring. By rotating the fixing bolt on the side end of the limiting ring, the inner pressure plate can be driven to press on the surface of the gas tank, and the gas tank can be fixed with the help of the pressure plate, thereby realizing the convenience of fixing the gas tank in the on-site calibration device of the large-flow air sampler. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the front cross-sectional structure of the air intake pipe and the extension pipe of the utility model;

[0019] Figure 4 This is a schematic diagram of the front cross-sectional structure of the connecting sleeve and the connecting head of the utility model;

[0020] Figure 5 It is a schematic diagram of the front cross-sectional structure of the limit ring of the utility model.

[0021] In the figure: 1. Collection box; 2. Base; 3. Air inlet pipe; 4. Adjustment table; 5. Adjustment bolt; 6. Extension tube; 7. Orifice flow calibrator; 8. Chassis; 9. Gas tank; 10. Exhaust port; 11. Threaded cap; 12. Air groove; 13. Weighing table; 14. Air inlet; 15. Connecting sleeve; 16. Connecting head; 17. Tail ring; 18. Sealing head; 19. Connecting pipe; 20. Air pump; 21. Suction pipe; 22. Limiting ring; 23. Fixing table; 24. Fixing bolt; 25. Pressure plate; 26. Cushion. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 The utility model provides an embodiment: a field calibration device for a large-flow air sampler, comprising a collection box 1, an air tank 9 and an air pump 20, a retractable and adjustable air intake assembly is arranged on one side of the collection box 1, the air intake assembly comprises an air intake pipe 3, an adjusting bolt 5 and an extension pipe 6, a bottom platform 2 is installed at the bottom end of one side of the collection box 1, an air intake pipe 3 is installed at the top of the bottom platform 2, an adjusting platform 4 is fixed at the top of one side of the air intake pipe 3, an adjusting bolt 5 is arranged inside the adjusting platform 4, an extension pipe 6 is arranged inside the air intake pipe 3, and an orifice flow calibrator 7 is installed at the top of the extension pipe 6;

[0024] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, when in use, the top of the extension tube 6 is the air inlet end. After the adjusting bolt 5 at the side end of the air inlet pipe 3 is loosened, the extension tube 6 can be manually moved upward to adjust the height of the air inlet end at the top of the extension tube 6. After the adjustment is completed, the adjusting bolt 5 can be tightened to fix it.

[0025] A case 8 is installed on one side of the collection box 1, an air groove 12 is provided on the other side of the collection box 1, a weighing platform 13 is installed on the bottom end of the collection box 1, a gas tank 9 is provided on the top of the weighing platform 13, an exhaust port 10 is installed on the top of the gas tank 9, a threaded cap 11 is provided on the outside of the exhaust port 10, an air inlet 14 is installed on the bottom end of one side of the gas tank 9, a connecting sleeve 15 is installed on one side of the air inlet 14, a connecting head 16 is provided inside the connecting sleeve 15, a tail ring 17 is installed on one side of the connecting head 16, a sealing head 18 is movably installed on the inner side of the tail ring 17, a connecting pipe 19 is installed on one side of the sealing head 18, an air pump 20 is installed on the bottom end of the connecting pipe 19, and an air suction pipe 21 is installed on one side of the air pump 20;

[0026] Specifically, Figure 2 and Figure 4 As shown, when in use, the connector 16 at the front end of the connecting pipe 19 is inserted into the inner side of the connecting sleeve 15 at the rear end of the air inlet 14, and then the connector 16 is rotated, and the connection operation can be performed by means of the threaded fit between the connector 16 and the connecting sleeve 15;

[0027] A limit ring 22 is arranged on the outer side of the gas tank 9, a fixing platform 23 is fixed on one side of the limit ring 22, a fixing bolt 24 is arranged on the inner side of the fixing platform 23, one side of the fixing bolt 24 extends to the inner side of the limit ring 22, a pressing plate 25 is movably installed on one side of the fixing bolt 24, and a cushion 26 is fixed on one side of the pressing plate 25;

[0028] Specifically, Figure 2 and Figure 5 As shown, when in use, the gas tank 9 is placed inside the limiting ring 22, and then the outer fixing bolt 24 is rotated to push the inner pressure plate 25 to press on the surface of the gas tank 9, which can assist in fixing the gas tank 9. A soft pad 26 is fixed on the surface of the pressure plate 25 to provide auxiliary protection for the contact end.

[0029] Working principle: When in use, the air inlet pipe 3 and the extension pipe 6 are located at the side end of the collection box 1. An orifice flow calibrator 7 is installed at the air inlet end at the top of the extension pipe 6. The door of the collection box 1 is opened, and the gas tank 9 is inserted into the inner side of the limiting ring 22. The bottom end is placed on the weighing platform 13. After that, the fixing bolt 24 on the outer side of the limiting ring 22 can be rotated to push the inner pressure plate 25 to move and press on the surface of the gas tank 9 to assist in fixing the gas tank 9. A soft pad 26 is fixed on the surface of the pressure plate 25 to protect the pressing end and avoid damage to the surface of the gas tank 9. After that, the front end of the connecting pipe 19 can be connected. The connector 16 is inserted into the connector sleeve 15 at the rear end of the air inlet 14, and the connector 16 is rotated. The connector sleeve 15 and the connector 16 are connected by threads. The intake pipe 21 at the front end of the air pump 20 is connected to the intake pipe 3. When in use, the air pump 20 is started, and the outside air enters the intake pipe 21 through the extension pipe 6 and the intake pipe 3, and then is transported to the interior of the gas tank 9 through the connecting pipe 19 and the air inlet 14. If the adjusting bolt 5 at the side end of the intake pipe 3 is loosened, the extension pipe 6 inside the intake pipe 3 can be moved upward, so that the height position of the intake end at the top of the extension pipe 6 can be adjusted.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A field calibration device for a large-flow air sampler, comprising a collection box (1), an air tank (9) and an air pump (20), characterized in that: A retractable and adjustable air intake assembly is provided on one side of the collection box (1); The air intake assembly comprises an air intake pipe (3), an adjusting bolt (5) and an extension pipe (6); a base (2) is installed at the bottom end of one side of the collection box (1); an air intake pipe (3) is installed at the top end of the base (2); an adjusting platform (4) is fixed at the top end of one side of the air intake pipe (3); an adjusting bolt (5) is arranged inside the adjusting platform (4); an extension pipe (6) is arranged inside the air intake pipe (3); and an orifice flow calibrator (7) is installed at the top end of the extension pipe (6).

2. The on-site calibration device for a large-flow air sampler according to claim 1, characterized in that: A machine box (8) is installed on one side of the collection box (1), and an air groove (12) is provided on the other side of the collection box (1).

3. The on-site calibration device for a large-flow air sampler according to claim 1, characterized in that: A weighing platform (13) is installed at the bottom end of the collection box (1), and a gas tank (9) is arranged at the top end of the weighing platform (13).

4. The on-site calibration device for a large-flow air sampler according to claim 3 is characterized in that: An exhaust port (10) is installed at the top end of the gas tank (9), and a threaded cap (11) is arranged on the outside of the exhaust port (10).

5. The on-site calibration device for a large-flow air sampler according to claim 3 is characterized in that: An air inlet (14) is installed at the bottom end of one side of the gas tank (9), and a connecting sleeve (15) is installed on one side of the air inlet (14).

6. The on-site calibration device for a large-flow air sampler according to claim 5, characterized in that: A connecting head (16) is arranged inside the connecting sleeve (15), a tail ring (17) is installed on one side of the connecting head (16), a sealing head (18) is movably installed inside the tail ring (17), and a connecting pipe (19) is installed on one side of the sealing head (18).

7. The on-site calibration device for a large-flow air sampler according to claim 6, characterized in that: An air pump (20) is installed at the bottom end of the connecting pipe (19), and an air suction pipe (21) is installed on one side of the air pump (20).

8. The on-site calibration device for a large-flow air sampler according to claim 1, characterized in that: A limiting ring (22) is arranged on the outer side of the gas tank (9), a fixing platform (23) is fixed on one side of the limiting ring (22), a fixing bolt (24) is arranged on the inner side of the fixing platform (23), one side of the fixing bolt (24) extends to the inner side of the limiting ring (22), a pressure plate (25) is movably mounted on one side of the fixing bolt (24), and a soft cushion (26) is fixed on one side of the pressure plate (25).

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