Underground water sampling device

Abstract

The underground water sampling device comprises an air compressor, an air bag, an air bag pump, connecting plates and a connecting rod, the air bag comprises an upper air bag and a lower air bag, a water sampling cavity is formed between the two air bags, the connecting plates comprise an upper connecting plate and a lower connecting plate, and the upper connecting plate and the lower connecting plate are connected through the air bag pump. Two or more telescopic connecting rods are arranged between the upper connecting plate and the lower connecting plate, the upper air bag and the lower air bag are installed on the telescopic connecting rods in a penetrating mode, sealing is formed at the penetrating position, the air bag pump is fixed to the telescopic connecting rods through fixing rings, and an air outlet of the air compressor is connected with a first air pipe and a second air pipe. The first air pipe is connected with the air bag, the second air pipe is connected with the air bag pump, the first air pipe and the second air pipe are provided with a first valve and a second valve respectively, the air bag pump is provided with an air pipe connector and a water sampling pipe connector and connected with a second air pipe and a water sampling pipe respectively, and the air bag is provided with an air pipe connector connected with the first air pipe.

Description

Technical Field

[0001] The utility model relates to the field of groundwater monitoring, in particular to a low-flow and non-disturbing groundwater sampling device. Background Technique

[0002] Groundwater is not only an indispensable natural resource, but also an important environmental element and ecological support condition. With the continuous development of social economy, the degree of development and utilization of groundwater by people is getting higher and higher, and thus it is necessary to monitor the groundwater quality.

[0003] The accuracy of groundwater monitoring depends on whether representative water samples can be collected. Traditional groundwater sampling usually uses a bailer or a manual inertial pump as a sampling tool. The use of a bailer or a manual inertial pump will inevitably disturb the water samples in the monitoring well, and cannot meet the monitoring requirements for special indicators such as volatile organic compounds, thus affecting the accuracy of water quality monitoring data. Therefore, it is particularly important to use a suitable sampling device in groundwater monitoring. Summary of the Utility Model

[0004] The utility model provides a low-flow and non-disturbing groundwater sampling device. As a reasonable supplement to the existing technical solutions and products, the utility model is realized through the following technical solutions:

[0005] A groundwater sampling device, the groundwater sampling device includes an air compressor, an airbag, an airbag pump, a connecting plate, and a connecting rod. The airbag includes an upper airbag and a lower airbag. The part between the two airbags forms a water collection cavity. The connecting plate includes an upper connecting plate and a lower connecting plate. There are more than two telescopic connecting rods between the upper connecting plate and the lower connecting plate. The upper airbag and the lower airbag are installed through the telescopic connecting rods, and a seal is formed at the penetration. The airbag pump is fixed on the telescopic connecting rod through a fixing ring. The air outlet of the air compressor is respectively connected to a first air pipe and a second air pipe. The first air pipe is connected to the airbag, and the second air pipe is connected to the airbag pump. A first valve and a second valve are respectively installed on the first air pipe and the second air pipe. An air pipe interface and a water sampling pipe interface are arranged on the airbag pump, and are respectively connected to a second air pipe and a water sampling pipe. An air pipe interface is arranged on the airbag and is connected to the first air pipe.

[0006] Preferably, a pressure gauge is installed on the first air pipe.

[0007] Preferably, a hook is arranged on the upper connecting plate for fixing a steel wire rope, which is convenient for the device to go down the well for sampling.

[0008] Preferably, the number of the connecting rods is 4, and they are fixed on the upper and lower connecting plates by screws.

[0009] The utility model has the following beneficial effects: The utility model uses an airbag pump as a sampling pump, which can achieve low-flow and non-disturbing well washing and sampling, fully meeting the sampling requirements for volatile organic compounds in the Technical Specification for Groundwater Environmental Monitoring HJ 164-2020. It uses less water, the water sample has no contact with air, and the original state of the water sample is retained to the greatest extent. The utility model is equipped with two airbags, upper and lower, which can form a sealed water sampling cavity during the sampling process, effectively preventing the groundwater at the upper and lower water levels from mixing into the collected water sample, and the collected water sample is more representative. In addition, the size of the water intake cavity can be changed by adjusting the length of the connecting rod to meet the need for collecting a sufficient amount of samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0011] Figure 1 is a schematic diagram of the principle of a low-flow and non-disturbing groundwater sampling device of the present utility model;

[0012] Figure 2 is a pre-sampling state diagram of a low-flow and non-disturbing groundwater sampling device of the present utility model;

[0013] Figure 3 is a sampling state diagram of a low-flow and non-disturbing groundwater sampling device of the present utility model; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model belong to the protection scope of the present utility model.

[0015] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0016] Please refer to Figure 1 、 Figure 2As shown in the figure, the groundwater sampling device of the present utility model comprises an air compressor 1, an airbag 11, an airbag pump 12, a connecting plate 9, and a connecting rod 10911. The airbag 11 includes an upper airbag and a lower airbag. The part between the two airbags forms a water sampling cavity. The connecting plate 9 includes an upper connecting plate and a lower connecting plate. There are 4 telescopic connecting rods 10 between the upper connecting plate and the lower connecting plate. The connecting rods 10 are fixed to the connecting plate 9 by screws. The upper airbag and the lower airbag are installed through the telescopic connecting rods 10, and a seal is formed at the penetration. The airbag pump 12 is fixed to the telescopic connecting rod 10 by a fixing ring 13. The air outlet of the air compressor 1 is respectively connected to a first air pipe 3 and a second air pipe 6. The first air pipe 3 is connected to the airbag, and the second air pipe 6 is connected to the airbag pump. A first valve 2 and a second valve 5 are respectively installed on the first air pipe and the second air pipe. A pressure gauge 4 is also installed on the first air pipe 3. The first air pipe 3 is connected to the airbag, and the second air pipe 6 is connected to the airbag pump. The airbag pump 12 is provided with an air pipe interface and a water sampling pipe interface, which are respectively connected to the second air pipe 6 and the water sampling pipe 8. The airbag 11 is provided with an air pipe interface connected to the first air pipe 3.

[0017] The connecting plate 9 is provided with a fixing hook for a steel wire rope 7, which is convenient for the sampling device to go down the well for sampling.

[0018] When sampling with the groundwater sampling device:

[0019] First, lower the sampling device to an appropriate well depth position through the steel wire rope 7, such as Figure 3 shown in the figure. Open the first valve 2, close the second valve 5, and turn on the air compressor 1 to inflate the airbag 11; observe the pressure gauge 4. When the pressure reaches the specified air pressure value, the airbag 11 is in close contact with the inner wall of the well, as Figure 3 shown in the figure; close the first valve 2, open the second valve 5, the air compressor 1 supplies air to the airbag pump 12, and the airbag pump 12 starts the well washing process. By monitoring the water quality indicators at the outlet of the water sampling pipe 8, it is judged whether the well washing is over. After the well washing is over, the sampling process is entered to collect samples. When enough samples are collected, stop sampling, turn off the air compressor 1, close the second valve 5, open the first valve 2, release the air pressure of the airbag 11, and the sampling device can be retrieved through the steel wire rope 7.

[0020] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, according to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A groundwater sampling device, characterized in that: The groundwater sampling device includes an air compressor, an airbag, an airbag pump, a connecting plate, and a connecting rod. The airbag includes an upper airbag and a lower airbag. The connecting plate includes an upper connecting plate and a lower connecting plate. Two or more retractable connecting rods are arranged between the upper connecting plate and the lower connecting plate. The upper airbag and the lower airbag are installed through the retractable connecting rod to form a seal at the penetration. The airbag pump is fixed to the retractable connecting rod by a fixing ring. The air outlet of the air compressor is respectively connected to the first air pipe and the second air pipe. The first air pipe is connected to the airbag, and the second air pipe is connected to the airbag pump. The first air pipe and the second air pipe are respectively installed with a first valve and a second valve. The airbag pump is provided with an air pipe interface and a water sampling pipe interface, which are respectively connected to the second air pipe and the water sampling pipe. The airbag is provided with an air pipe interface to connect the first air pipe.

2. The groundwater sampling device according to claim 1, characterized in that: A pressure gauge is installed on the first air pipe.

3. The groundwater sampling device according to claim 1, characterized in that: The upper connecting plate is provided with a hook for fixing the wire rope, so as to facilitate the equipment to go down the well for sampling.

4. The groundwater sampling device according to claim 1, characterized in that: There are four connecting rods, which are fixed on the upper and lower connecting plates by screws.

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