A gas sampling device

Abstract

The utility model discloses a kind of gas sampling equipment, belong to sampling equipment technical field, including storage tank and integrally formed mounting pipe and air inlet pipe in both ends of storage tank, sealing piston is inserted in anastomosis in the storage tank, fixed pull rod with sealing piston is incommodely arranged in the mounting pipe, first control valve is installed on the air inlet pipe, and mounting pipe is integrally formed on the lateral wall of air inlet pipe, wherein suction pipe is welded and fixed on the air inlet pipe, second control valve is installed on the suction pipe, and the lateral wall of suction pipe is fixedly connected with micro air pump, the gas sampling equipment moves sealing piston in storage tank by opening first control valve hand holding pull rod, harmful gas is inhaled into storage tank in the process of sealing piston moving, residual air in sampling tube is conveniently discharged in advance, reduce the residual air in pipeline and detection air mixing influence detection result.

Description

Technical Field

[0001] This utility model belongs to the field of sampling equipment technology, specifically relating to a gas sampling device. Background Technology

[0002] Harmful gases refer to gases that have an adverse effect on the health of humans or animals, or gases that, while having no effect on the health of humans or animals, make them feel uncomfortable and affect their comfort. Examples include NH3, H2S, and CO. When detecting harmful gases in the environment, it is usually necessary to collect the gases in the atmosphere using sampling equipment, then bring the sampling equipment into the detection chamber, and finally take out the sample gas through the sampling port for testing.

[0003] When sampling and testing harmful gases, sampling tubes are usually used for direct sampling. However, the air present in the sampling tube can affect the content of harmful gases, resulting in inaccurate test results. Utility Model Content

[0004] (1) Technical problems to be solved In view of the shortcomings of the prior art, the purpose of this utility model is to provide a gas sampling device that aims to solve the technical problem that the air present in the sampling tube under the prior art can affect the content of harmful gases, resulting in inaccurate test results.

[0005] (2) Technical solution To solve the above-mentioned technical problems, this utility model provides a gas sampling device, including a storage tank and an installation pipe and an air inlet pipe integrally formed at both ends of the storage tank. A sealing piston is inserted into the storage tank. A pull rod fixed to the sealing piston is embedded in the installation pipe. A first control valve is installed on the air inlet pipe, and the installation pipe is integrally formed on the side wall of the air inlet pipe. An extraction pipe is welded and fixed on the air inlet pipe. A second control valve is installed on the extraction pipe, and a miniature air pump is fixedly connected to the side wall of the extraction pipe.

[0006] When using this technical solution, an extraction pipe is fixed to the air inlet pipe. During sampling, the sampling tube is inserted into the sampling point, and the micro air pump is started after the second control valve is opened. The micro air pump extracts the residual air inside the sampling tube and discharges it from the outlet pipe. The second control valve is then closed, and the first control valve is opened. By holding the lever, the sealing piston moves in the storage tank. During the movement of the sealing piston, harmful gases are drawn into the storage tank, which facilitates the pre-discharge of residual air in the sampling tube and reduces the impact of residual air in the pipeline on the detection air. By setting a bolt at the top of the mounting tube, the mounting part on the sealing piston extends into the mounting tube shaft, and the bolt thread is inserted into the bolt hole to keep the sealing piston fixed, which improves the stability of the sealing piston during transportation. After the lever is unscrewed from the mounting part, it is snapped into the support block through a groove, which facilitates the disassembly and storage of the lever.

[0007] Preferably, both ends of the storage tank are fixedly fitted with fixing rings, the side walls of the two fixing rings are welded and fixed with support blocks, and a handle is welded and installed between the two fixing rings.

[0008] Furthermore, an air outlet pipe is fixedly connected to the side wall of the micro air pump, and a sampling tube is tightly fitted onto the mounting pipe.

[0009] Furthermore, the inner wall of the storage tank is integrally formed with a protrusion, which fits into the sealing piston.

[0010] Furthermore, the sidewall of the sealing piston is bonded and fixed with a mounting part, and the top end of the mounting part is provided with a screw hole.

[0011] Furthermore, a bolt is provided at the top of the mounting tube, and the bottom end of the bolt passes through the thread of the mounting tube and is inserted into the screw hole.

[0012] Furthermore, the pull rod is threaded into the mounting part, and both ends of the pull rod are provided with grooves, through which the pull rod is engaged between the two support blocks.

[0013] (3) Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: This invention features an extraction tube fixed to the air inlet pipe. During sampling, the sampling tube is inserted into the sampling point, and the second control valve is opened to start the micro air pump. The micro air pump extracts the residual air inside the sampling tube and discharges it through the outlet pipe. The second control valve is then closed, and the first control valve is opened. By holding the lever, the sealing piston moves in the storage tank. During the movement of the sealing piston, harmful gases are drawn into the storage tank, which facilitates the pre-discharge of residual air in the sampling tube and reduces the impact of residual air in the pipeline on the detection air and the detection results. By setting a bolt at the top of the mounting tube, the mounting part on the sealing piston extends into the mounting tube shaft, and the bolt thread is inserted into the bolt hole to keep the sealing piston fixed, which improves the stability of the sealing piston during transportation. After the pull rod is unscrewed from the mounting part, it is snapped into the support block through the groove, which facilitates the disassembly and storage of the pull rod. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 Enlarged schematic diagram of the structure at point A; Figure 3 This is a cross-sectional view of the structure of this utility model; Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point B.

[0016] The labels in the attached diagram are as follows: 1. Storage tank; 2. Support block; 3. Sampling tube; 4. Handle; 5. Fixing ring; 6. Bolt; 7. Pull rod; 8. Mounting tube; 9. First control valve; 10. Air inlet pipe; 11. Second control valve; 12. Suction pipe; 13. Miniature air pump; 14. Air outlet pipe; 15. Mounting tube; 16. Protrusion; 17. Sealing piston; 18. Mounting part; 19. Groove; 20. Screw hole. Detailed Implementation

[0017] 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.

[0018] This specific embodiment is a gas sampling device, the structural schematic diagram of which is shown below. Figures 1 to 4As shown, the device includes a storage tank 1 and an installation pipe 15 and an air inlet pipe 10 integrally formed at both ends of the storage tank 1. A sealing piston 17 is inserted into the storage tank 1. A pull rod 7 fixed to the sealing piston 17 is embedded in the installation pipe 15. A first control valve 9 is installed on the air inlet pipe 10, and the installation pipe 15 is integrally formed on the side wall of the air inlet pipe 10. An air extraction pipe 12 is welded and fixed on the air inlet pipe 10. A second control valve 11 is installed on the air extraction pipe 12, and a miniature air pump 13 is fixedly connected to the side wall of the air extraction pipe 12.

[0019] Both ends of the storage tank 1 are fixedly fitted with retaining rings 5. Support blocks 2 are welded to the side walls of both retaining rings 5, and a handle 4 is welded between the two retaining rings 5. An air outlet pipe 14 is fixedly connected to the side wall of the micro air pump 13. A sampling tube 3 is tightly fitted onto the mounting pipe 15. The inner wall of the storage tank 1 has an integrally formed protrusion 16, which fits into the sealing piston 17. The protrusion 16 keeps the sealing piston 17 axially positioned, thereby aligning the screw hole 20 on the mounting part 18 with the bolt 6. During sampling... Insert the sampling tube 3 into the sampling point, open the second control valve 11, and start the micro air pump 13. The micro air pump 13 extracts the residual air inside the sampling tube 3 and discharges it from the air outlet 14. Then close the second control valve 11 and open the first control valve 9. Hold the lever 7 to move the sealing piston 17 in the storage tank 1. During the movement, the sealing piston 17 draws harmful gas into the storage tank 1, which facilitates the pre-discharge of residual air in the sampling tube 3 and reduces the impact of residual air in the pipeline on the detection air.

[0020] The side wall of the sealing piston 17 is bonded and fixed with a mounting part 18. The top end of the mounting part 18 is provided with a screw hole 20. The top end of the mounting tube 15 is provided with a bolt 6. The bottom end of the bolt 6 passes through the mounting tube 15 and is threaded into the screw hole 20. After the mounting part 18 on the sealing piston 17 extends into the mounting tube 15 shaft, the bolt 6 is threaded into the screw hole 20 to keep the sealing piston 17 fixed. The pull rod 7 is threaded into the mounting part 18, and both ends of the pull rod 7 are provided with grooves 19. The pull rod 7 is engaged between two support blocks 2 through the grooves 19. After the pull rod 7 is unscrewed from the mounting part 18, it is engaged in the support block 2 through the grooves 19, which facilitates the disassembly and storage of the pull rod 7.

[0021] Working principle: When using the device of this technical solution, the sampling tube 3 is inserted into the sampling point during sampling. After opening the second control valve 11, the micro air pump 13 is started. The micro air pump 13 extracts the residual air inside the sampling tube 3 and discharges it from the air outlet pipe 14. The second control valve 11 is closed, and the first control valve 9 is opened. By holding the pull rod 7, the sealing piston 17 is moved in the storage tank 1. During the movement, the sealing piston 17 draws harmful gas into the storage tank 1, and the residual air in the sampling tube 3 is discharged in advance, reducing the impact of residual air in the pipeline on the detection air and affecting the detection results. After the mounting part 18 on the sealing piston 17 extends into the mounting tube 15 shaft, the bolt 6 is threaded into the screw hole 20 to keep the sealing piston 17 fixed, which improves the stability of the sealing piston 17 during transportation. After sampling, the pull rod 7 is unscrewed from the mounting part 18 and then snapped into the support block 2 through the groove 19, which facilitates the disassembly and storage of the pull rod 7.

[0022] All technical features in this embodiment can be freely combined according to actual needs.

[0023] 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 gas sampling device, characterized in that, The system includes a storage tank (1) and an installation tube (15) and an air inlet tube (10) integrally formed at both ends of the storage tank (1). A sealing piston (17) is inserted into the storage tank (1). A pull rod (7) fixed to the sealing piston (17) is embedded in the installation tube (15). A first control valve (9) is installed on the air inlet tube (10). The installation tube (15) is integrally formed on the side wall of the air inlet tube (10). An air extraction tube (12) is welded and fixed on the air inlet tube (10). A second control valve (11) is installed on the air extraction tube (12). A miniature air pump (13) is fixedly connected to the side wall of the air extraction tube (12).

2. The gas sampling device according to claim 1, characterized in that, The storage tank (1) is fixedly fitted with fixing rings (5) at both ends. Support blocks (2) are welded to the side walls of the two fixing rings (5), and handles (4) are welded between the two fixing rings (5).

3. A gas sampling device according to claim 2, characterized in that, The side wall of the micro air pump (13) is fixedly connected to an air outlet pipe (14), and a sampling pipe (3) is tightly sleeved on the mounting pipe (15).

4. A gas sampling device according to claim 1, characterized in that, The inner wall of the storage tank (1) is integrally formed with a protrusion (16), which fits into the sealing piston (17).

5. A gas sampling device according to claim 4, characterized in that, The side wall of the sealing piston (17) is bonded and fixed with an installation part (18), and the top end of the installation part (18) is provided with a screw hole (20).

6. A gas sampling device according to claim 5, characterized in that, The top end of the mounting tube (15) is provided with a bolt (6), and the bottom end of the bolt (6) passes through the mounting tube (15) and is threaded into the screw hole (20).

7. A gas sampling device according to claim 6, characterized in that, The pull rod (7) is threaded into the mounting part (18), and both ends of the pull rod (7) are provided with grooves (19), wherein the pull rod (7) is engaged between the two support blocks (2) through the grooves (19).

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