Sampler for environmental waste gas detection

Abstract

The utility model discloses a sampler for environmental waste gas detection, which comprises a supporting seat, the top of the supporting seat is rotatably connected with two annular frames, each annular frame is provided with a plurality of annular grooves and a threaded groove, the interior of each threaded groove is in threaded connection with a plurality of collecting tanks, and the collecting tanks are connected with the supporting seat. The top and the outer surface of the collecting tank are fixedly connected with a connecting pipe and an air inlet pipe respectively. Through the arrangement of the supporting base, the annular frame, the first one-way valve, the exhaust pipe, the second one-way valve and the like, the overlapping position of the collecting tank and the annular frame can be automatically sealed, the collecting tank can collect and store waste gas immediately, in the waste gas collecting process, backflow of the waste gas can be avoided, and after the collecting tank is replaced, the waste gas collecting efficiency is improved. The exhaust gas collecting device is simple in structure and convenient and fast to use, exhaust gas at another position can be directly extracted, the problem that the exhaust gas collecting device needs to be cleaned after collecting the exhaust gas every time, and then the exhaust gas collecting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of waste gas sampling technology, and in particular to a sampler for environmental waste gas detection. Background Technology

[0002] In environmental safety testing, one very important test is the detection of gases in the environment. In order to improve the accuracy of test results, it is necessary to sample and test exhaust gases at different locations in the environment.

[0003] For example, utility model patent application number 202323345387.8 discloses a sampler for environmental waste gas detection, including: a base, a waste gas collection chamber, and a waste gas collection component. Multiple waste gas collection chambers are fixedly installed on the top of the base, and each chamber is connected to the waste gas collection component. A piston is installed inside each waste gas collection chamber. The waste gas collection component is fixedly connected to the top of each chamber. The waste gas collection component includes an inlet pipe, a branch pipe, and multiple manifolds. The inlet pipe is connected to the branch pipe, and one end of each manifold is connected to a corresponding waste gas collection chamber. The other end of each manifold is connected to the branch pipe. By setting multiple waste gas collection chambers, when collecting waste gas, opening the corresponding valve opens the corresponding channel, facilitating the use of a vacuum pump to draw the waste gas into the collection chamber under negative pressure for separate storage. This improves the efficiency of waste gas collection, reduces the amount of equipment needed, and increases work efficiency.

[0004] Although the device in the aforementioned patent can store waste gas separately, improving the efficiency of waste gas collection and reducing the equipment used for waste gas collection, thus increasing work efficiency, in actual use, workers need to open the corresponding valves before the waste gas can be extracted. Furthermore, continuous extraction of waste gas is not possible, requiring the device to be cleaned after each extraction to prevent mixing with gas from another waste gas source before extraction can begin again. This inconvenience reduces the efficiency of waste gas collection. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sampler for detecting environmental exhaust gases.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a sampler for detecting environmental waste gas, comprising a support base, two annular frames rotatably connected to the top of the support base, the two annular frames being arranged opposite each other, the annular frames having a plurality of annular grooves and threaded grooves, a plurality of threaded rods arranged in a circumferential array, a plurality of collection cans being threadedly connected inside the threaded grooves, the top and outer surface of the collection cans being fixedly connected to a connecting pipe and an air inlet pipe respectively, the connecting pipe and the air inlet pipe being respectively provided with a sealing valve and a one-way valve, the top of the collection cans being provided with a sealing assembly, the top of the support base being fixedly connected to a bracket, the top of the bracket being fixedly connected to an extraction pipe and an extraction assembly, one end of the extraction pipe being fixedly connected to two annular frames, the extraction pipe being provided with two one-way valves, the bottom of the annular frames having a sealing groove, the inside of the sealing groove being provided with a sealing ring, and the support base being provided with a control assembly, a transmission assembly, and a drive assembly.

[0007] As a further description of the above technical solution:

[0008] The number of threaded grooves and annular grooves are the same and correspond one-to-one, and the air extraction pipe is T-shaped.

[0009] As a further description of the above technical solution:

[0010] The sealing assembly includes a connecting frame, which is fixedly connected to the top of the collection tank. A spring is fixedly connected inside the connecting frame, and a sealing block is fixedly connected to the top of the spring.

[0011] As a further description of the above technical solution:

[0012] The air extraction assembly includes an annular cylinder, which is fixedly connected to a support. A rotating shaft is rotatably connected inside the annular cylinder, and several fan plates are fixedly connected to the outer surface of the rotating shaft. The ends of the fan plates away from the rotating shaft are movably abutting against the inner wall of the annular cylinder. An exhaust pipe is fixedly connected to the outer surface of the annular cylinder.

[0013] As a further description of the above technical solution:

[0014] The annular cylinder is fixedly connected to the other end of the suction pipe, and a rotating plate is fixedly connected to one end of the rotating shaft.

[0015] As a further description of the above technical solution:

[0016] The control assembly includes two connecting shafts, a fixing plate, and a controller. The two connecting shafts are respectively fixedly connected to the bottom ends of two annular frames. A polygonal cam is fixedly connected to the outer surface of one of the connecting shafts. The number of protrusions of the polygonal cams corresponds one-to-one with the number of collection tanks. The fixing plate is fixedly connected to the bottom of the support base. A touch switch and a second spring are provided on one side of the fixing plate. A pressing block is fixedly connected to the other end of the second spring. The pressing block is slidably connected to the bottom of the support base. The controller is located on the top of the support base and is electrically connected to the stepper motor and the touch switch.

[0017] As a further description of the above technical solution:

[0018] The transmission assembly includes two pulleys, which are respectively fixedly sleeved on the outer surfaces of two connecting shafts, and an internal toothed belt is drivingly connected between the outer surfaces of the two pulleys.

[0019] As a further description of the above technical solution:

[0020] The drive assembly includes a U-shaped frame, which is fixedly connected to the bottom of the support base. A stepper motor is fixedly installed on the top of the inner wall of the U-shaped frame, and the output end of the stepper motor is fixedly connected to the bottom end of one of the connecting shafts.

[0021] This utility model has the following beneficial effects:

[0022] 1. Compared with existing technologies, this environmental waste gas sampler, through the design of a support base, annular frame, one-way valve, extraction pipe, and two-way valve, can not only automatically seal the overlap between the collection tank and the annular frame, allowing the collection tank to immediately collect and store waste gas, but also prevent backflow of waste gas during the collection process. This allows for direct extraction of waste gas from another location after the collection tank is replaced, which is convenient and quick. It also avoids the problem of needing to clean the device after each waste gas collection before the next collection, thereby improving the waste gas collection efficiency.

[0023] 2. Compared with existing technologies, this environmental waste gas sampler, through the setting of two sets of multiple collection tanks, can not only ensure the continuity of collection, but also obtain two samples in one collection, which facilitates the comparison of subsequent test results and improves the accuracy of the test.

[0024] 3. Compared with existing technologies, this environmental waste gas sampler, by starting a stepper motor to drive the polygonal cam to rotate, can limit the rotation angle of the collection tank under the cooperation of the control components. After the collection tank rotates to the point where it coincides with the bottom of the annular frame, the stepper motor can automatically stop working without the need for manual stopping by the worker. This not only reduces the workload of the workers but also improves the efficiency of the collection tank replacement, thereby improving the practicality of the device. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a sampler for detecting environmental waste gas proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the fan plate and rotating shaft of a sampler for detecting environmental exhaust gas proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the collection tank and one-way valve of a sampler for detecting environmental exhaust gas proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the annular groove and threaded groove of a sampler for detecting environmental exhaust gas proposed in this utility model.

[0029] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0030] Figure 6 This is a schematic diagram of the stepper motor and U-shaped frame of an environmental waste gas sampler proposed in this utility model;

[0031] Figure 7 This is a schematic diagram of the pressing block and pulley of an environmental waste gas sampler proposed in this utility model.

[0032] Legend:

[0033] 1. Support base; 2. Annular frame; 3. Annular groove; 4. Threaded groove; 5. Collection tank; 6. Connecting pipe; 7. Air inlet pipe; 8. One-way valve I; 9. Bracket; 10. Suction pipe; 11. Annular frame; 12. One-way valve II; 13. Sealing groove; 14. Sealing ring; 15. Connecting frame; 16. Spring I; 17. Sealing block; 18. Annular cylinder; 19. Rotating shaft; 20. Fan plate; 21. Exhaust pipe; 22. Rotating plate; 23. Connecting shaft; 24. Fixing plate; 25. Controller; 26. Multi-sided cam; 27. Stepper motor; 28. Touch switch; 29. ​​Spring II; 30. Pressing block; 31. Pulley; 32. Internal toothed belt; 33. U-shaped frame; 34. Sealing valve. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Reference Figure 1-7 This utility model provides a sampler for detecting environmental exhaust gas, comprising a support base 1, with two annular frames 2 rotatably connected to the top of the support base 1. The annular frames 2 have several annular grooves 3 and threaded grooves 4, the number of threaded grooves 4 and annular grooves 3 being the same and corresponding one-to-one. Several collection canisters 5 are threadedly connected inside the threaded grooves 4. Through the arrangement of the threaded grooves 4 and annular grooves 3, the collection canisters 5 can be unscrewed and removed for easy replacement. A connecting pipe 6 and an air inlet pipe 7 are fixedly connected to the top and outer surface of each collection canister 5, respectively. Sealing valves 34 and 35 are respectively installed on the connecting pipe 6 and the air inlet pipe 7. One-way valve 8, a sealing assembly is provided on the top of the collection tank 5, a bracket 9 is fixedly connected to the top of the support base 1, and an air extraction pipe 10 and an air extraction assembly are fixedly connected to the top of the bracket 9. The air extraction pipe 10 is T-shaped, and one end of the air extraction pipe 10 is fixedly connected to two annular frames 11. Both the annular frames 11 and the sealing block 17 are inclined to guide the sealing block 17. Two one-way valves 12 are provided on the air extraction pipe 10. A sealing groove 13 is opened at the bottom of the annular frame 11. A sealing ring 14 is provided inside the sealing groove 13. A control assembly, a transmission assembly and a drive assembly are provided on the support base 1.

[0036] The sealing assembly includes a connecting frame 15, which is fixedly connected to the top of the collection tank 5. A spring 16 is fixedly connected inside the connecting frame 15, and a sealing block 17 is fixedly connected to the top of the spring 16. Through the arrangement of the support base 1, the annular frame 2, the one-way valve 8, the extraction pipe 10, and the two one-way valves 12, the overlapping part of the collection tank 5 and the annular frame 11 can be automatically sealed, allowing the collection tank 5 to immediately collect and store waste gas. During the waste gas collection process, the backflow of waste gas can be avoided, so that after the collection tank 5 is replaced, another waste gas extraction can be carried out directly, which is convenient and quick. It also avoids the problem that the device needs to be cleaned after each waste gas collection before the next waste gas collection can be carried out, thereby improving the waste gas collection efficiency.

[0037] The air extraction assembly includes an annular cylinder 18, which is fixedly connected to the support 9. The annular cylinder 18 is fixedly connected to the other end of the air extraction pipe 10. A rotating shaft 19 is rotatably connected inside the annular cylinder 18. Several fan plates 20 are fixedly connected to the outer surface of the rotating shaft 19. A rotating plate 22 is fixedly connected to one end of the rotating shaft 19. An exhaust pipe 21 is fixedly connected to the outer surface of the annular cylinder 18. By setting up the air extraction assembly, not only can exhaust gas be collected, but the setting of the drive source is also reduced, energy waste is reduced, and the manufacturing cost of the device is reduced.

[0038] The control assembly includes two connecting shafts 23, a fixing plate 24, and a controller 25. The two connecting shafts 23 are respectively fixedly connected to the bottom ends of the two ring frames 2. A polygonal cam 26 is fixedly connected to the outer surface of one of the connecting shafts 23. The fixing plate 24 is fixedly connected to the bottom of the support base 1. A touch switch 28 and a spring 29 are provided on one side of the fixing plate 24. A pressing block 30 is fixedly connected to the other end of the spring 29. The pressing block 30 is slidably connected to the bottom of the support base 1. The controller 25 is located on the top of the support base 1.

[0039] The transmission assembly includes two pulleys 31, which are fixedly sleeved on the outer surfaces of two connecting shafts 23, and an internal toothed belt 32 is connected between the outer surfaces of the two pulleys 31.

[0040] The drive assembly includes a U-shaped frame 33, which is fixedly connected to the bottom of the support base 1. A stepper motor 27 is fixedly installed on the top of the inner wall of the U-shaped frame 33. The output end of the stepper motor 27 is fixedly connected to the bottom end of one of the connecting shafts 23. By starting the stepper motor 27, it drives the polygonal cam 26 to rotate. With the cooperation of the control assembly, the rotation angle of the collection tank 5 can be limited. After the collection tank 5 rotates to the point where it overlaps with the annular frame 11, the stepper motor 27 can be automatically stopped without the need for manual stopping by the worker. This not only reduces the workload of the workers but also improves the efficiency of replacing the collection tank 5, thereby improving the practicality of the device.

[0041] Working principle: In use, first open the sealing valve of one of the collection tanks 5 on each of the two ring frames 2. Then, start the stepper motor 27 through the controller 25, so that its output end drives one of the connecting shafts 23 and one of the pulleys 31 to rotate slowly and synchronously. Under the transmission action of the internal toothed belt 32, the other connecting shaft 23 rotates synchronously, so that the two ring frames 2 drive the corresponding collection tanks 5 to rotate synchronously. This causes the opened collection tank 5 to move downwards towards the ring frame 11, and after it abuts against the inclined part of the sealing block 17 and the inclined part of the ring frame 11, it is driven by the spring 16. After the dynamic sealing block 17 moves down and resets, it makes the sealing block 17 and the sealing ring 14 firmly abut against each other. At the same time, during the rotation of the connecting shaft 23, one of them synchronously drives the polygonal cam 26 to rotate. One of its protrusions abuts against the pressing block 30 and pushes the pressing block 30 to move. After the spring 29 is squeezed, the pressing block 30 abuts against the touch switch 28, which then transmits the signal to the controller 25. The controller 25 then stops the start of the stepper motor 27. At this time, the sealing block 17 abuts against the sealing ring 14, realizing the automatic sealing operation between the collection tank 5 and the annular frame 11.

[0042] After two of the collection tanks 5 come into contact with the two annular frames 11, they are manually rotated to drive the rotating shaft 19 and the fan plate 20 to rotate synchronously. The fan plate 20 draws the gas out of the suction pipe 10, creating a negative pressure. Under the action of the one-way valve 12 and the connecting pipe 6, the gas inside the collection tank 5 flows into the annular cylinder 18, creating a negative pressure inside. This causes the inlet pipe 7 to generate suction. With the cooperation of the one-way valve 8, the external gas and exhaust gas are synchronously drawn into the collection tank 5, and the collection is completed. After completion, the controller 25 can start the stepper motor 27 to drive the connecting shaft 23, the polygonal cam 26 and the ring frame 2 to rotate synchronously, thereby driving the collection tank 5 to rotate. After it separates from the ring frame 11, the corresponding sealing valve can be closed immediately to seal the waste gas inside the collection tank 5. At the same time, when moving the device to another place to collect waste gas or during collection, the rotating plate 22 can be rotated. Under the action of the one-way valve 12, the previously extracted waste gas can be discharged and prevented from flowing back and mixing with the waste gas extracted this time.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sampler for detecting environmental exhaust gas, comprising a support base (1), characterized in that: The top of the support base (1) is rotatably connected to two annular frames (2). Several annular grooves (3) and threaded grooves (4) are provided on the annular frames (2). Several collection tanks (5) are threadedly connected inside the threaded grooves (4). A connecting pipe (6) and an air inlet pipe (7) are fixedly connected to the top and outer surface of each collection tank (5). A sealing valve (34) and a one-way valve (8) are respectively installed on the connecting pipe (6) and the air inlet pipe (7). A sealing assembly is provided on the top of each collection tank (5). A bracket (9) is fixedly connected to the top of the support base (1). An air extraction pipe (10) and an air extraction assembly are fixedly connected to the top of the bracket (9). One end of the air extraction pipe (10) is fixedly connected to two annular frames (11). Two one-way valves (12) are provided on the air extraction pipe (10). A sealing groove (13) is opened at the bottom of the annular frame (11). A sealing ring (14) is provided inside the sealing groove (13). A control assembly, a transmission assembly, and a drive assembly are provided on the support base (1).

2. The sampler for detecting environmental waste gas according to claim 1, characterized in that: The number of threaded grooves (4) and annular grooves (3) are the same and correspond one-to-one, and the air extraction pipe (10) is T-shaped.

3. The sampler for detecting environmental waste gas according to claim 1, characterized in that: The sealing assembly includes a connecting frame (15), which is fixedly connected to the top of the collection tank (5). A spring (16) is fixedly connected inside the connecting frame (15), and a sealing block (17) is fixedly connected to the top of the spring (16).

4. The sampler for detecting environmental waste gas according to claim 1, characterized in that: The air extraction assembly includes an annular cylinder (18), which is fixedly connected to the bracket (9). A rotating shaft (19) is rotatably connected inside the annular cylinder (18). Several fan plates (20) are fixedly connected to the outer surface of the rotating shaft (19). An exhaust pipe (21) is fixedly connected to the outer surface of the annular cylinder (18).

5. The sampler for detecting environmental waste gas according to claim 4, characterized in that: The annular cylinder (18) is fixedly connected to the other end of the suction pipe (10), and a rotating plate (22) is fixedly connected to one end of the rotating shaft (19).

6. The sampler for detecting environmental waste gas according to claim 1, characterized in that: The control assembly includes two connecting shafts (23), a fixing plate (24), and a controller (25). The two connecting shafts (23) are respectively fixedly connected to the bottom ends of two ring frames (2). A polygonal cam (26) is fixedly connected to the outer surface of one of the connecting shafts (23). The fixing plate (24) is fixedly connected to the bottom of the support base (1). A touch switch (28) and a second spring (29) are provided on one side of the fixing plate (24). A pressing block (30) is fixedly connected to the other end of the second spring (29). The pressing block (30) is slidably connected to the bottom of the support base (1). The controller (25) is located on the top of the support base (1).

7. A sampler for detecting environmental waste gas according to claim 6, characterized in that: The transmission assembly includes two pulleys (31), which are respectively fixedly sleeved on the outer surfaces of two connecting shafts (23), and an internal toothed belt (32) is connected between the outer surfaces of the two pulleys (31).

8. A sampler for detecting environmental waste gas according to claim 6, characterized in that: The drive assembly includes a U-shaped frame (33) which is fixedly connected to the bottom of the support base (1). A stepper motor (27) is fixedly installed on the top of the inner wall of the U-shaped frame (33). The output end of the stepper motor (27) is fixedly connected to the bottom end of one of the connecting shafts (23).

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