A gas sampler

Abstract

The utility model relates to gas sampling equipment technical field especially relates to a kind of gas sampler. Including first cylinder and second cylinder, first cylinder is closed arrangement up and down, the upper end opening of second cylinder and protrude first cylinder, lower end is equipped with air inlet pipe, air inlet pipe protrude first cylinder downward, piston rod is equipped in second cylinder, piston rod is attached with the inside wall of second cylinder, the upper end of piston rod protrude second cylinder, first cylinder and second cylinder between fixed with multiple baffle, the space between first cylinder and second cylinder is separated into multiple gas storage chamber, multiple through slots are set up on the lateral wall of second cylinder, for the intercommunication of second cylinder interior and gas storage chamber, multiple suction pipes are communicated on the outside wall of first cylinder, valve is equipped on suction pipe, the total pipe is communicated with the end of each suction pipe away from first cylinder, and the total pipe is connected with the suction equipment outside. Can extract multiple gas samples at a time, improve sampling efficiency.

Description

Technical Field

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

[0002] In industrial applications such as power, chemical, and coal mining, it is necessary to measure the concentration of gas inside pipelines. For pipelines unsuitable for online measurement or where the gas composition is complex and the accuracy of online instruments cannot meet the measurement requirements, it is necessary to extract the gas from the pipeline and then analyze the extracted gas.

[0003] In the process of gas sampling and testing, in order to reduce random errors in the samples, multiple samples are usually extracted for testing. However, most existing gas samplers can only extract one gas sample. This requires staff to move back and forth between the sampling location and the gas storage location, resulting in low work efficiency. Summary of the Invention

[0004] To address the problem that existing gas sampling devices can only extract one gas sample, requiring multiple sampling operations and resulting in low efficiency, this invention proposes a gas sampler that can extract multiple gas samples at once, thereby improving sampling efficiency.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A gas sampler includes a first cylinder and a second cylinder. The first cylinder is closed vertically, and the second cylinder is located inside the first cylinder and coincides with its axis. The upper end of the second cylinder is open and extends out of the first cylinder, and the lower end is provided with an air inlet pipe that extends downward out of the first cylinder. A piston rod is provided inside the second cylinder, and the piston rod is attached to the inner side wall of the second cylinder, with its upper end extending out of the second cylinder. Multiple partitions are fixed between the first cylinder and the second cylinder, dividing the space between the first cylinder and the second cylinder into multiple gas storage chambers. Multiple through slots are provided on the side wall of the second cylinder for communication between the interior of the second cylinder and the gas storage chambers. The piston rod can move freely up and down or rotate freely inside the second cylinder. Multiple suction pipes are connected to the outer side wall of the first cylinder, and the multiple suction pipes are correspondingly arranged with the multiple gas storage chambers. Valves are provided on the suction pipes. The end of each suction pipe away from the first cylinder is connected to a main pipe, and the main pipe is connected to an external suction device. Before use, the piston rod in the second cylinder is positioned to block the through groove. At this time, the gas is pumped out of the multiple gas storage chambers by an external pumping device to maintain a negative pressure environment in the multiple gas storage chambers.

[0007] Preferably, a groove is formed on the inner wall of the second cylinder, and a slider that cooperates with the groove is fixed on the outer wall of the piston rod. This allows the piston rod to move vertically within the second cylinder.

[0008] Preferably, the upper surfaces of the first and second cylinders are flush, and a limiting plate is fixed to the upper surface of the first cylinder, through which the upper end of the piston rod passes. The sliding groove and the slider cooperate to ensure the stability of the piston rod's up-and-down movement. The limiting plate further restricts the upward movement distance of the slider, ensuring that the piston rod will not detach from the second cylinder. At the same time, the length and position of the slider are set to ensure that the piston rod will not be blocked from the through groove when the upper end of the slider contacts the limiting plate.

[0009] Preferably, a telescopic tube is fixed to the lower end of the intake pipe. The telescopic tube includes a sleeve and an extension tube. The upper end of the sleeve is fixed to the lower end of the intake pipe, and a first limiting part is fixed to the inner side of the lower end of the sleeve. The upper end of the extension tube extends into the sleeve, and a second limiting part is fixed to its end. The second limiting part is located above the first limiting part, and the outer side of the second limiting part contacts the inner side of the extension tube. The telescopic tube can extend the length of the intake pipe, thereby enabling sampling in locations that are high or narrow and difficult to sample.

[0010] Preferably, the main pipe is annular and is arranged around the outside of the first cylinder. An air outlet pipe is connected to the main pipe and is connected to an external air extraction device.

[0011] Preferably, a handle is fixed to the upper end of the piston rod for easy gripping.

[0012] The beneficial effects of this utility model through the above technical solution are as follows: In this utility model, multiple partitions between the first cylinder and the second cylinder divide the space between the first cylinder and the second cylinder into multiple gas storage chambers. When the through slot is blocked by the piston rod in the second cylinder, the multiple gas storage chambers are made into a negative pressure state by the external air extraction device. The piston rod moves upward in the second cylinder to open the through slot. The sampling gas in the second cylinder, the inlet pipe and the lower side of the inlet pipe is forced into the multiple gas storage chambers under the action of external air pressure. At this time, the through slot is blocked by the piston rod again to complete the sampling work of multiple gas storage chambers. Multiple gas samples can be extracted at one time, reducing the frequency of the staff moving back and forth between the sampling position and the gas storage position and improving the efficiency of gas sampling. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a gas sampler according to the present invention;

[0014] Figure 2 This is a partial structural schematic diagram of a gas sampler according to the present invention;

[0015] Figure 3 This is a top view of a gas sampler according to the present invention;

[0016] Figure 4This utility model relates to a gas sampler. Figure 3 Structural cross-sectional view at point AA;

[0017] Figure 5 This utility model relates to a gas sampler. Figure 4 Enlarged view of the structure at point A in the middle.

[0018] In the attached diagram, the following numbers are used: 1 is the first cylinder, 2 is the second cylinder, 3 is the air inlet pipe, 4 is the piston rod, 5 is the partition plate, 6 is the air storage chamber, 7 is the through groove, 8 is the air extraction pipe, 9 is the valve, 10 is the main pipe, 11 is the slide groove, 12 is the limiting plate, 13 is the sleeve, 14 is the extension pipe, 15 is the first limiting part, 16 is the second limiting part, 17 is the air outlet pipe, and 18 is the handle. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] like Figures 1-5 As shown, this embodiment provides a gas sampler, including a first cylinder 1 and a second cylinder 2. The first cylinder 1 is closed at the top and bottom, and the second cylinder 2 is disposed inside the first cylinder 1 and coincides with its axis. The first cylinder 1 is welded and fixed inside the second cylinder 2. The upper end of the second cylinder 2 is open and extends out of the first cylinder 1, and the lower end is provided with an air inlet pipe 3, which extends downward out of the first cylinder 1. In this embodiment, the lower end of the second cylinder 2 extends out of the first cylinder 1, and the lower end of the second cylinder 2 is connected to the air inlet pipe 3.

[0021] refer to Figure 4 A piston rod 4 is provided inside the second cylinder 2. The piston rod 4 is attached to the inner wall of the second cylinder 2. In the initial position, the lower end of the piston rod 4 is in contact with the bottom surface inside the first cylinder 1, and the upper end of the piston rod 4 extends out of the second cylinder 2. A handle 18 is fixed to the upper end of the piston rod 4. A sliding groove 11 is provided on the inner wall of the second cylinder 2, and a slider that cooperates with the sliding groove 11 is fixed on the outer wall of the piston rod 4. In this embodiment, the lower end of the sliding groove 11 is flush with the bottom surface of the second cylinder 2, and the upper end is flush with the upper surface of the second cylinder 2. The lower end of the slider is flush with the lower surface of the piston rod 4, and the slider has a set height.

[0022] refer to Figure 2 Multiple partitions 5 are fixed between the first cylinder 1 and the second cylinder 2, dividing the space between the first cylinder 1 and the second cylinder 2 into multiple gas storage chambers 6. Multiple through grooves 7 are provided on the side wall of the second cylinder 2 for communication between the interior of the second cylinder 2 and the gas storage chambers 6. In this embodiment, three partitions 5 are welded and fixed between the first cylinder 1 and the second cylinder 2, dividing the space into three gas storage chambers 6. The gas storage chambers 6 are connected to the interior of the second cylinder 2 through the through grooves 7.

[0023] refer to Figure 4 The upper surfaces of the first cylinder 1 and the second cylinder 2 are flush. A limiting plate 12 is fixed to the upper surface of the first cylinder 1 by bolts, and the upper end of the piston rod 4 passes through the limiting plate 12. During the upward movement of the piston rod 4 in the initial position, the slider slides in the slide groove 11. When the upper end of the slider contacts the lower side of the limiting plate 12, the piston rod 4 reaches its movement limit. The slider has a set height to ensure that when the piston rod 4 reaches its movement limit, the position of the through groove 7 is no longer blocked by the piston rod 4.

[0024] refer to Figure 1 and Figure 2 Multiple suction pipes 8 are connected to the outer wall of the first cylinder 1, and the suction pipes 8 are correspondingly arranged with multiple air storage chambers 6. Valves 9 are provided on the suction pipes 8. The end of each suction pipe 8 furthest from the first cylinder 1 is connected to a main pipe 10, which is connected to an external suction device. The main pipe 10 is annular and is wound around the outside of the first cylinder 1. An outlet pipe 17 is connected to the main pipe 10, which is connected to the external suction device. In this embodiment, the suction device is a negative pressure pump. When a small pump is used, it can be directly fixed to the outer wall of the first cylinder 1. If fixing is inconvenient, a quick-connect plug can be used to connect the suction device to the outlet pipe 17.

[0025] In this embodiment, three exhaust pipes 8 are connected to the outer wall of the first cylinder 1, which are connected to three gas storage chambers 6. The end of the three exhaust pipes 8 away from the first cylinder 1 is connected to the annular main pipe 10. The main pipe 10 is connected to an external exhaust device through an exhaust pipe 17. The exhaust device is used to maintain a negative pressure environment in the gas storage chamber 6 when the through groove 7 is blocked by the piston rod 4.

[0026] Further, refer to Figure 4 and Figure 5 The lower end of the intake pipe 3 is fixed with a telescopic tube, which includes a sleeve 13 and an extension tube 14. The upper end of the sleeve 13 is fixed to the lower end of the intake pipe 3, and the upper end of the sleeve 13 is fitted onto the lower end of the intake pipe 3 and threadedly connected to it. A first limiting part 15 is fixed to the inner side of the lower end of the sleeve 13. The upper end of the extension tube 14 extends into the sleeve 13, and a second limiting part 16 is fixed to its end. The second limiting part 16 is located above the first limiting part 15, and the outer side of the second limiting part 16 contacts the inner side of the extension tube 14. The telescopic tube extends the length of the intake pipe 3, thereby enabling sampling at locations that are high or narrow and difficult to sample.

[0027] The working process of gas sampling in this device is as follows: Before gas sampling, the lower end of the piston rod 4 is manually pressed to fit against the bottom surface inside the second cylinder 2. At this time, the position of the through groove 7 is blocked by the piston rod 4. The valve 9 on the suction pipe 8 is opened, and the suction equipment is started to suck the air in the gas storage chamber 6, so that the gas storage chamber 6 is in a negative pressure state. At this time, the valve 9 and the suction equipment are closed, and the connection between the gas outlet pipe 17 and the suction equipment is disconnected.

[0028] With the inlet pipe 3 of the gas sampler aligned with the sampling position, manually move the piston rod 4 away from the inlet pipe 3, allowing the sampling gas at the end of the inlet pipe 3 to enter the first cylinder 1. When the piston rod 4 moves to the point where it no longer blocks the through groove 7, the gas storage chamber 6 is connected to the interior of the second cylinder 2. The negative pressure environment of the gas storage chamber 6 causes the sampling gas to be forced into multiple gas storage chambers 6 under the action of external air pressure. At this point, the through groove is blocked again with the piston rod 4, completing the sampling work of multiple gas storage chambers 6. Then, the sampling gas in each gas storage chamber 6 is extracted into the detection device by the gas extraction device to complete the gas detection work.

[0029] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A gas sampler, characterized in that, The first cylinder (1) and the second cylinder (2) are enclosed at the top and bottom. The second cylinder (2) is located inside the first cylinder (1) and coincides with its axis. The upper end of the second cylinder (2) is open and extends out of the first cylinder (1), and the lower end is provided with an air inlet pipe (3). The air inlet pipe (3) extends downward out of the first cylinder (1). The second cylinder (2) is provided with a piston rod (4). The piston rod (4) is attached to the inner side wall of the second cylinder (2). The upper end of the piston rod (4) extends out of the second cylinder (2). Multiple partitions (5) are fixed between the first cylinder (1) and the second cylinder (2) to divide the space between the first cylinder (1) and the second cylinder (2) into multiple air storage chambers (6). Multiple through grooves (7) are opened on the side wall of the second cylinder (2) for communication between the interior of the second cylinder (2) and the air storage chambers (6). Multiple air extraction pipes (8) are connected to the outer wall of the first cylinder (1). The multiple air extraction pipes (8) are correspondingly arranged with multiple air storage chambers (6). Valves (9) are provided on the air extraction pipes (8). Each air extraction pipe (8) is connected to a main pipe (10) at one end away from the first cylinder (1). The main pipe (10) is connected to an external air extraction device.

2. A gas sampler according to claim 1, characterized in that, The inner wall of the second cylinder (2) is provided with a sliding groove (11), and the outer wall of the piston rod (4) is fixed with a slider that cooperates with the sliding groove (11).

3. A gas sampler according to claim 2, characterized in that, The upper surfaces of the first cylinder (1) and the second cylinder (2) are flush. A limiting plate (12) is fixed on the upper surface of the first cylinder (1), and the upper end of the piston rod (4) passes through the limiting plate (12).

4. A gas sampler according to claim 1, characterized in that, The lower end of the air intake pipe (3) is provided with a telescopic tube, which includes a sleeve (13) and an extension tube (14). The upper end of the sleeve (13) is fixed to the lower end of the air intake pipe (3). A first limiting part (15) is fixed on the inner side of the lower end of the sleeve (13). The upper end of the extension tube (14) extends into the sleeve (13) and its end is fixed with a second limiting part (16). The second limiting part (16) is located above the first limiting part (15), and the outer side of the second limiting part (16) contacts the inner side of the extension tube (14).

5. A gas sampler according to claim 1, characterized in that, The main pipe (10) is circular and is arranged around the outside of the first cylinder (1). An air outlet pipe (17) is connected to the main pipe (10) and is connected to an external air extraction device.

6. A gas sampler according to claim 1, characterized in that, A handle (18) is fixed to the upper end of the piston rod (4).

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