Sampling device for gas detection

Abstract

The utility model discloses a sampling device for gas detection, and relates to the technical field of gas sampling equipment. The sampling device for gas detection comprises a gas storage tank, a sampling device and a filtering device, the sampling device comprises a fixing plate, a support, a sealing plate, a first air cylinder, a second air cylinder and a piston, a side plate is fixedly connected to the surface of the fixing plate, the second air cylinder is fixedly connected with the side plate, the first air cylinder is fixedly connected with the side plate, and the sealing plate is fixedly connected with the second air cylinder. As the volume of the left cavity of the gas storage tank is gradually increased from zero during sampling, the problem that the quality of air to be detected is affected by residual air does not exist, and as the interior of the gas storage tank does not need to be vacuumized, the operation is more convenient; the problems that according to an existing gas sampling device, air in a storage tank is pumped out in advance through an air pump, but the mode is too complex, resources are wasted, and use is inconvenient are solved.

Description

Technical Field

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

[0002] Environmental monitoring involves monitoring and measuring indicators that reflect environmental quality in order to determine the level of environmental pollution and environmental quality. The main contents of environmental monitoring include the monitoring of physical indicators, chemical indicators, and ecosystems.

[0003] In environmental monitoring, it is necessary to detect and sample gases. When gas sampling devices collect and sample gases, the air inside the storage tank mixes with the air inside the environment to be tested, which can affect the test results. Most existing gas sampling devices use an air pump to extract the air inside the storage tank in advance, but this method is too complicated, wastes resources, and is inconvenient to use. Therefore, a simple sampling device for gas detection is needed. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a sampling device for gas detection. This device can solve the problem that most existing gas sampling devices use an air pump to extract the air inside the storage tank in advance, but this method is too complicated, wastes resources, and is inconvenient to use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A sampling device for gas detection, comprising a gas storage tank, a sampling device, and a filtering device. The sampling device includes a fixed plate, a support, a sealing plate, a first cylinder, a second cylinder, and a piston. The support is fixedly connected to one side of the gas storage tank, the fixed plate is fixedly connected to the support, a side plate is fixedly connected to the surface of the fixed plate, the second cylinder is fixedly connected to the side plate, the first cylinder is fixedly connected to the side plate, the sealing plate is fixedly connected to the second cylinder, and the sealing plate is slidably connected to the first cylinder. The piston is fixedly connected to the end of the first cylinder away from the side plate and is slidably connected to the inner wall of the gas storage tank. The filtering device includes a filter box, an outlet pipe, a sampling pipe, a filter screen, and a collection box. The outlet pipe is fixedly connected to the bottom of the gas storage tank, the filter box is fixedly connected to the outlet pipe, the sampling pipe is fixedly connected to the filter box, the filter screen is fixedly connected inside the filter box, and the collection box is movably connected inside the filter box.

[0006] Preferably, the surface of the gas storage tank is provided with an outlet and an inlet.

[0007] Preferably, a sealing strip is fixedly connected to the surface of the sealing plate, and a sealing groove adapted to the sealing strip is opened on the surface of the gas storage tank.

[0008] Preferably, a shut-off valve is installed on the air outlet pipe.

[0009] Preferably, a handle is fixedly connected to the surface of the collection box.

[0010] Preferably, the bottom of the gas storage tank and the side plate are both fixedly connected to a support plate, the bottom of the support plate is fixedly connected to a base plate, and the filter box is fixedly connected to the base plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] (1) The sampling device for gas detection has no problem of residual air affecting the quality of the air to be detected because the volume of the left chamber of the gas storage tank gradually increases from zero during sampling. Furthermore, since it is not necessary to evacuate the gas storage tank to a vacuum, the operation is more convenient. This solves the problem that existing gas sampling devices use an air pump to extract the air inside the storage tank in advance, but this method is too complicated, wastes resources, and is inconvenient to use.

[0013] (2) In the sampling device for gas detection, the gas is drawn out through the gas outlet pipe and passes through the filter box. The filter screen inside the filter box can filter out solid particles in the gas, so as to avoid particulate impurities from affecting the air detection results and improve the detection accuracy. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a schematic diagram of the main body of this utility model;

[0016] Figure 2 This is a schematic diagram of the sampling device of this utility model;

[0017] Figure 3 This is a schematic diagram of the filtration device of this utility model;

[0018] Figure 4 This is a schematic diagram of the sealing plate of this utility model.

[0019] Reference numerals in the attached drawings: 1. Gas storage tank; 2. Support plate; 3. Base plate; 4. Side plate; 5. Fixing plate; 6. Bracket; 7. Sealing plate; 8. First cylinder; 9. Second cylinder; 10. Sealing groove; 11. Air inlet; 12. Piston; 13. Air outlet; 14. Filter box; 15. Air outlet pipe; 16. Sampling pipe; 17. Sealing strip; 18. Filter screen; 19. Collection box. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Please see Figure 1-4This utility model provides a technical solution: a sampling device for gas detection, including a gas storage tank 1, a sampling device, and a filtering device. The sampling device includes a fixed plate 5, a support 6, a sealing plate 7, a first cylinder 8, a second cylinder 9, and a piston 12. The support 6 is fixedly connected to one side of the gas storage tank 1. The fixed plate 5 is fixedly connected to the support 6. A side plate 4 is fixedly connected to the surface of the fixed plate 5. The second cylinder 9 is fixedly connected to the side plate 4. The first cylinder 8 is fixedly connected to the side plate 4. The sealing plate 7 is fixedly connected to the second cylinder 9. 7 is slidably connected to the first cylinder 8, and piston 12 is fixedly connected to the end of the first cylinder 8 away from the side plate 4. Piston 12 is slidably connected to the inner wall of gas storage tank 1. Before sampling, piston 12 is moved to the side closer to sealing plate 7, and the air in the left chamber of gas storage tank 1 is discharged. Then the device is placed in the environment to be tested, and the first cylinder 8 is started to drive piston 12 to move away from sealing plate 7, so that the air in the environment is slowly drawn into the interior of gas storage tank 1. Finally, the second cylinder 9 is started to move sealing plate 7 and seal the air inlet 11. This allows for gas sampling and storage. Since the volume of the left chamber of gas storage tank 1 gradually increases from zero during sampling, there is no issue of residual air affecting the quality of the air being tested. Furthermore, because it eliminates the need to evacuate the gas storage tank 1 into a vacuum, operation is more convenient. This solves the problem of existing gas sampling devices that require a pump to pre-extract air from the tank, a method that is overly complex, wasteful of resources, and inconvenient to use. The filtration device includes a filter box 14, an outlet pipe 15, a sampling pipe 16, a filter screen 18, and a collection box 19. The outlet pipe... The gas storage tank 15 is fixedly connected to the bottom of the gas storage tank 1. The filter box 14 is fixedly connected to the gas outlet pipe 15. The sampling pipe 16 is fixedly connected to the filter box 14. The filter screen 18 is fixedly connected inside the filter box 14. The collection box 19 is movably connected inside the filter box 14. When it is necessary to take out the stored gas, the shut-off valve is opened. The gas is drawn out through the gas outlet pipe 15 and passes through the filter box 14. The filter screen 18 set inside the filter box 14 can filter out solid particles in the gas, avoid particulate impurities from affecting the air detection results, and improve the detection accuracy.

[0025] Furthermore, the surface of the gas storage tank 1 is provided with an outlet 13 and an inlet 11. A sealing strip 17 is fixedly connected to the surface of the sealing plate 7. A sealing groove 10 adapted to the sealing strip 17 is provided on the surface of the gas storage tank 1. A shut-off valve is provided on the outlet pipe 15. A handle is fixedly connected to the surface of the collection box 19. Support plates 2 are fixedly connected to the bottom of both the gas storage tank 1 and the side plate 4. A bottom plate 3 is fixedly connected to the bottom of the support plate 2. The filter box 14 is fixedly connected to the bottom plate 3.

[0026] Working principle: Before sampling, move piston 12 to the side closer to sealing plate 7 to expel air from the left chamber of gas storage tank 1. Then place the device in the environment to be tested, start the first cylinder 8 to drive piston 12 to the side away from sealing plate 7, and slowly draw air from the environment into the interior of gas storage tank 1. Finally, start the second cylinder 9 to move sealing plate 7 and seal the air inlet 11, thus completing gas sampling and storage. When it is necessary to take out the stored gas, open the shut-off valve, and the gas is drawn out through the outlet pipe 15 and passes through the filter box 14. The filter screen 18 set inside the filter box 14 can filter out solid particles in the gas, avoiding particulate impurities from affecting the air detection results and improving detection accuracy.

[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A sampling device for gas detection, characterized in that, include: Gas storage tank (1); The sampling device includes a fixed plate (5), a bracket (6), a sealing plate (7), a first cylinder (8), a second cylinder (9), and a piston (12). The bracket (6) is fixedly connected to one side of the gas storage tank (1). The fixed plate (5) is fixedly connected to the bracket (6). The side plate (4) is fixedly connected to the surface of the fixed plate (5). The second cylinder (9) is fixedly connected to the side plate (4). The first cylinder (8) is fixedly connected to the side plate (4). The sealing plate (7) is fixedly connected to the second cylinder (9). The sealing plate (7) is slidably connected to the first cylinder (8). The piston (12) is fixedly connected to the end of the first cylinder (8) away from the side plate (4). The piston (12) is slidably connected to the inner wall of the gas storage tank (1). The filtration device includes a filter box (14), an outlet pipe (15), a sampling pipe (16), a filter screen (18), and a collection box (19). The outlet pipe (15) is fixedly connected to the bottom of the gas storage tank (1). The filter box (14) is fixedly connected to the outlet pipe (15). The sampling pipe (16) is fixedly connected to the filter box (14). The filter screen (18) is fixedly connected inside the filter box (14). The collection box (19) is movably connected inside the filter box (14).

2. The sampling device for gas detection according to claim 1, characterized in that: The gas storage tank (1) has an outlet (13) on its surface and an inlet (11) on its surface.

3. A sampling device for gas detection according to claim 2, characterized in that: A sealing strip (17) is fixedly connected to the surface of the sealing plate (7), and a sealing groove (10) adapted to the sealing strip (17) is opened on the surface of the gas storage tank (1).

4. A sampling device for gas detection according to claim 3, characterized in that: A shut-off valve is provided on the air outlet pipe (15).

5. A sampling device for gas detection according to claim 4, characterized in that: The surface of the collection box (19) is fixedly connected with a handle.

6. A sampling device for gas detection according to claim 5, characterized in that: The gas storage tank (1) and the bottom of the side plate (4) are both fixedly connected to the support plate (2), and the bottom of the support plate (2) is fixedly connected to the bottom plate (3). The filter box (14) is fixedly connected to the bottom plate (3).

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