Narrow space gas sampling device

Abstract

The utility model discloses a narrow space gas sampling device which comprises a transfer sleeve, a gas guide pipe is arranged at the bottom of the transfer sleeve, a gas inlet pipe is communicated with the outer wall of the bottom of the transfer sleeve through an opening, a one-way gas inlet valve is installed on the gas inlet pipe, and an exhaust pipe is communicated with the outer wall of one side of the bottom of the gas guide pipe through an opening. A one-way exhaust valve is installed on the exhaust pipe, the outer wall of the bottom of the air guide pipe is communicated with a flat suction pipe, and air suction holes distributed at equal intervals are formed in the outer wall of the bottom and the side wall of the flat suction pipe. The flat suction pipe communicated with one end of the bottom of the gas guide pipe can be inserted into the inner wall of the gap, gas can be sucked into the transfer sleeve through the gas guide pipe by matching with the suction hole formed in the bottom of the flat suction pipe, and the gas in the transfer sleeve is input into the sampling bottle to be stored; the gas in the narrow gap can be conveniently sampled and collected.

Description

Technical Field

[0001] This utility model relates to the field of gas sampling technology, specifically to a gas sampling device for confined spaces. Background Technology

[0002] There are two types of gas sampling methods: one type involves passing a large amount of air through a liquid or solid absorbent to concentrate pollutants at low concentrations in the atmosphere, such as the air extraction method and the membrane filtration method. The other type involves collecting air containing pollutants using a container.

[0003] There are many types of gases, and different gases have different densities. When it is necessary to collect gases that rise or sink in a room, they tend to accumulate in narrow gaps and crevices. Therefore, it is necessary to collect the gases in these narrow gaps. However, existing gas sampling devices are difficult to collect gases in narrow gaps in a room. To address this, we have developed a gas sampling device for confined spaces. Utility Model Content

[0004] The purpose of this invention is to provide a gas sampling device for confined spaces to address the aforementioned shortcomings in the technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas sampling device for confined spaces, comprising a transfer sleeve, a gas guide tube at the bottom of the transfer sleeve, an air inlet pipe connected to the bottom outer wall of the transfer sleeve through an opening, a one-way air inlet valve installed on the air inlet pipe, an exhaust pipe connected to the bottom outer wall of the gas guide tube through an opening, a one-way exhaust valve installed on the exhaust pipe, a flat suction tube connected to the bottom outer wall of the gas guide tube, and suction holes evenly distributed on the bottom outer wall and side wall of the flat suction tube.

[0006] Preferably, a first pipe connector is fixedly provided on the top outer wall of the air guide pipe, and the inner wall contour of the first pipe connector is adapted to the inner wall contour of the air intake pipe, so as to facilitate the connection between the air guide pipe and the air intake pipe.

[0007] Preferably, a sampling bottle is provided on one side of the transfer sleeve, and a second pipe connector is connected to the outer wall of one end of the sampling bottle through an opening. The inner wall contour of the second pipe connector is adapted to the outer wall contour of the exhaust pipe, and a valve is installed on the second pipe connector.

[0008] Preferably, a first piston plate is slidably connected to the inner wall of the transfer sleeve, and a first push-pull rod is fixedly provided on the top outer wall of the first piston plate. A first extrusion plate is fixedly provided on the top outer wall of the first push-pull rod. The first extrusion plate facilitates the control of the rise and fall of the first piston plate provided in the transfer sleeve.

[0009] Preferably, a second piston plate is slidably connected to the inner wall of the sampling bottle, a second push-pull rod is fixedly provided on one side of the outer wall of the second piston plate, and a second extrusion plate is fixedly provided on the outer wall of one end of the second push-pull rod. The second piston plate inside the sampling bottle is pushed by the second extrusion plate, which facilitates the ejection of the gas collected in the sampling bottle.

[0010] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0011] A flat straw connected to one end of the air delivery tube can be inserted into the inner wall of the slit. With the air intake hole at the bottom of the flat straw, gas can be drawn into the transfer sleeve through the air delivery tube. The gas in the transfer sleeve is then transferred into the sampling bottle for storage, which facilitates the sampling and collection of gas in narrow slits. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0013] Figure 1 This is a three-dimensional structural diagram of a gas sampling device for confined spaces according to the present invention;

[0014] Figure 2 This is a schematic diagram of the suction pipe structure of a gas sampling device for a confined space according to the present invention;

[0015] Figure 3 This utility model relates to a gas sampling device for confined spaces. Figure 2 Enlarged structural diagram of section A in the middle;

[0016] Figure 4 This is a schematic diagram of the cross-sectional structure of the sleeve of a gas sampling device for confined spaces according to this utility model;

[0017] Figure 5 This is a schematic cross-sectional view of the sampling bottle structure of a gas sampling device for a confined space according to this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Transfer sleeve, 2. Air guide tube, 3. Sampling bottle, 4. One-way air inlet valve, 5. One-way exhaust valve, 6. First pipe connector, 7. Flat suction tube, 8. Suction hole, 9. First piston plate, 10. First push-pull rod, 11. First extrusion plate, 12. Second piston plate, 13. Second push-pull rod, 14. Second extrusion plate, 15. Second pipe connector, 16. Valve. Detailed Implementation

[0020] The following drawings will disclose several embodiments of this utility model. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these physical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0021] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this utility model.

[0022] Example 1

[0023] Refer to the instruction manual appendix Figure 1-5 A gas sampling device for confined spaces includes a transfer sleeve 1, a gas guide tube 2 at the bottom of the transfer sleeve 1, an air inlet pipe connected to the bottom outer wall of the transfer sleeve 1 through an opening, a one-way air inlet valve 4 installed on the air inlet pipe, an exhaust pipe connected to the bottom outer wall of the gas guide tube 2 through an opening, a one-way exhaust valve 5 installed on the exhaust pipe, a flat suction tube 7 connected to the bottom outer wall of the gas guide tube 2, and air inlets 8 evenly distributed on the bottom outer wall and side wall of the flat suction tube 7.

[0024] Example 2

[0025] Based on Embodiment 1, a first pipe connector 6 is fixedly provided on the top outer wall of the air guide pipe 2. The inner wall contour of the first pipe connector 6 is adapted to the inner wall contour of the air inlet pipe, which facilitates the connection between the air guide pipe 2 and the air inlet pipe. A sampling bottle 3 is provided on one side of the transfer sleeve 1. A second pipe connector 15 is connected to the outer wall of one end of the sampling bottle 3 through an opening. The inner wall contour of the second pipe connector 15 is adapted to the outer wall contour of the exhaust pipe, which facilitates the connection between the sampling bottle 3 and the exhaust pipe. A valve 16 is installed on the second pipe connector 15.

[0026] Example 3

[0027] Based on Embodiment 1, a first piston plate 9 is slidably connected to the inner wall of the transfer sleeve 1. A first push-pull rod 10 is fixedly provided on the top outer wall of the first piston plate 9, and a first extrusion plate 11 is fixedly provided on the top outer wall of the first push-pull rod 10. The first extrusion plate 11 facilitates the control of the rise and fall of the first piston plate 9 in the transfer sleeve 1. A second piston plate 12 is slidably connected to the inner wall of the sampling bottle 3. A second push-pull rod 13 is fixedly provided on one side outer wall of the second piston plate 12, and a second extrusion plate 14 is fixedly provided on one end outer wall of the second push-pull rod 13. The second extrusion plate 14 pushes the second piston plate 12 in the sampling bottle 3, which facilitates the ejection of the gas collected in the sampling bottle 3.

[0028] Working principle of this utility model:

[0029] Refer to the instruction manual appendix Figure 1-5 In use, the gas guide tube 2 is connected to the bottom of the suction tube via the first pipe connector 6, and the sampling bottle 3 is connected to the exhaust pipe via the second pipe connector 15. At this time, the valve 16 is opened, and the first extrusion plate 11 is pulled upwards, causing the first piston plate 9 to rise on the inner wall of the transfer sleeve 1. External gas is drawn into the gas guide tube 2 through the suction hole 8 at the bottom of the flat suction tube 7. The gas in the gas guide tube 2 is then drawn into the transfer sleeve 1. Then, the first extrusion plate 11 is pressed down, causing the first piston plate 9 to descend on the inner wall of the transfer sleeve 1, inputting the gas from the transfer sleeve 1 into the sampling bottle 3. The second piston plate 12 inside the sampling bottle 3... Squeezed and sliding on the inner wall of sampling bottle 3, the gas is compressed by repeatedly inputting gas into sampling bottle 3. After the gas collection is completed, the valve 16 on the second pipe connector 15 is closed to seal and store the gas in sampling bottle 3. When it is necessary to sample the gas in the gap, the flat suction tube 7 connected to one end of the gas guide tube 2 can be inserted into the inner wall of the gap. With the suction hole 8 at the bottom of the flat suction tube 7, the gas can be sucked into the transfer sleeve 1 through the gas guide tube 2, and the gas in the transfer sleeve 1 is input into sampling bottle 3 for storage, which facilitates the sampling and collection of gas in narrow gaps.

[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A gas sampling device for confined spaces, comprising a transfer sleeve (1), characterized in that: The bottom of the transfer sleeve (1) is provided with an air guide pipe (2). The bottom outer wall of the transfer sleeve (1) is connected to an air inlet pipe through an opening. A one-way air inlet valve (4) is installed on the air inlet pipe. The bottom outer wall of the air guide pipe (2) is connected to an exhaust pipe through an opening. A one-way exhaust valve (5) is installed on the exhaust pipe. The bottom outer wall of the air guide pipe (2) is connected to a flat suction pipe (7). The bottom outer wall and side wall of the flat suction pipe (7) have equally spaced suction holes (8).

2. The gas sampling device for a confined space according to claim 1, characterized in that: The top outer wall of the air duct (2) is fixedly provided with a first pipe joint (6), and the inner wall contour of the first pipe joint (6) is adapted to the inner wall contour of the air inlet pipe.

3. The gas sampling device for a confined space according to claim 1, characterized in that: The transfer sleeve (1) is equipped with a sampling bottle (3) on one side. The outer wall of one end of the sampling bottle (3) is connected to a second pipe connector (15) through an opening. The inner wall profile of the second pipe connector (15) is adapted to the outer wall profile of the exhaust pipe. A valve (16) is installed on the second pipe connector (15).

4. A gas sampling device for a confined space according to claim 1, characterized in that: The inner wall of the transfer sleeve (1) is slidably connected to a first piston plate (9), and the top outer wall of the first piston plate (9) is fixedly provided with a vertically upward first push-pull rod (10), and the top outer wall of the first push-pull rod (10) is fixedly provided with a first extrusion plate (11).

5. A gas sampling device for a confined space according to claim 3, characterized in that: The inner wall of the sampling bottle (3) is slidably connected to a second piston plate (12), and a second push-pull rod (13) is fixedly provided on one side of the outer wall of the second piston plate (12), and a second extrusion plate (14) is fixedly provided on one end of the outer wall of the second push-pull rod (13).

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