CN201724843U - Manpower wetland pore water hole in situ stratified sampler - Google Patents

Abstract

An in-situ layered sampler for pore water in constructed wetlands, which includes a benchmark, a thin hose and an extraction device connected to the thin hose, characterized in that the thin hose is fixed on the benchmark, and the lower end of the thin hose is It is flush with the 0 scale of the benchmark, and the upper end is connected with the extraction device; there is also a tubular filter cartridge, the bottom end of which is closed, and the permeable holes are evenly distributed on the tubular filter cartridge wall, and the outer surface of the tubular filter cartridge wall is wrapped geotextile. It is mainly used in the manufacture of samplers.

Description

In-Situ Layered Sampler for Constructed Wetland Pore Water

technical field

The utility model relates to a sampler used for in-situ layered collection of artificial wetland pore water.

Background technique

The collection of pore water in constructed wetlands has always been a difficult problem in the monitoring of constructed wetland water, especially the in-situ layered monitoring of wetland water. The traditional layered collection method of constructed wetland pore water is to collect wetland sediment or matrix samples layer by layer, and then obtain water samples by centrifugation in the laboratory. This method is not only time-consuming and laborious, but also greatly interferes with water quality and components during water sample collection and centrifugation, especially for easily oxidized low-valence element ions (such as ferrous ions).

In addition, the common soil water sample collection device is mainly to bury clay pipes in layers, and then use a vacuum pump to extract water samples. The cost of this sampling device is high, and the operation is complicated in the process of collecting wetland stratified water samples, and the field operation is easily limited by various natural factors or power sources. Therefore, it is very necessary to develop an in-situ layered sampler for constructed wetland water that is easy to operate, applicable, high in precision, and less intrusive.

Contents of the invention

The utility model proposes an in-situ layered sampler for artificial wetland pore water aiming at the deficiencies in the prior art.

This program is achieved through the following technical measures: an in-situ layered sampler for constructed wetland pore water, which includes a benchmark, a thin hose and an extraction device communicated with the thin hose, characterized in that the thin hose is fixed Set on the benchmark pole, the lower end of the thin hose is flush with the 0 scale of the benchmark pole, and the upper end is connected with the extraction device; a tubular filter cartridge is also provided, the bottom end of the tubular filter cartridge is closed, and the water is evenly distributed on the wall of the tubular filter cartridge holes, and wrap the geotextile on the outer surface of the tube wall of the tubular filter cartridge.

The concrete feature of this scheme also has the wall of described tubular filter cylinder to be PVC pipe. The bottom end of the tubular filter cartridge is sealed with a plug. The upper end of the tubular filter cartridge is at least 20cm higher than the highest water level of the wetland.

The extraction device is a syringe.

The diameter of the permeable holes on the wall of the tubular filter cartridge is 1-5 mm, and the distribution density is 4-9 holes/cm ² .

The benchmark rod is preferably made of stainless steel or a material with higher hardness, the smaller the diameter, the better, and marked with obvious scale marks. It is advisable that the length of the benchmark pole should be 20cm or more greater than the height of the PVC pipe, and the specific situation is subject to the convenience of operation.

The thin hose is preferably a plastic hose, the smaller the diameter, the better, fixed on the scale and connected to the needle of the syringe. It is advisable that the length of the thin hose is 20cm or more longer than the length of the benchmark, and the specific situation is based on the ease of operation.

Syringes generally adopt medical plastic syringes (glass material syringes are also acceptable). When collecting water samples, different types of syringes can be selected according to different sampling volumes.

The beneficial effects of this scheme can be known from the description of the above scheme, and water samples of different depths can be collected by moving the benchmark up and down. The utility model can more conveniently and rapidly sample in-situ pore water of different buried depths in the artificial wetland, and the samples can better preserve geochemical information such as water quality and chemical components of the pore water in the wetland. Therefore, compared with the prior art, the utility model has achieved the technical purpose.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Figure 1: Schematic diagram of in-situ layered sampler for pore water in constructed wetland; Figure 2: Schematic diagram of the benchmark part of in-situ layered sampler for pore water in constructed wetland.

In the figure, 1. Syringe; 2. Thin hose; 3. Benchmark; 4. Geotextile; 5. Water level line; 6. Substrate interface; 7. Substrate layer; 8. Soil layer; 9. Tubular filter cartridge; 10. Fixed bracket.

a: the height of the PVC pipe above the interface; b: the height of the matrix layer; c: the length of the benchmark

Detailed ways

As shown in Figures 1-2, an in-situ layered sampler for constructed wetland pore water includes a benchmark 3, a thin hose 2 and an extraction device connected to the thin hose 2, and the thin hose 2 is fixedly arranged on the On the benchmark post 3, the lower end of the thin hose 2 is flush with the 0 scale of the benchmark post 3, and the upper end is connected to the extraction device; a tubular filter cartridge 9 is also provided, and water permeable holes are evenly distributed on the wall of the tubular filter cartridge 9. The outer surface of the cylinder wall of cylinder 9 is wrapped with geotextile 4 . The wall of the tubular filter cartridge 9 is a PVC pipe. The bottom end of the tubular filter cartridge 9 is sealed with a plug.

The extraction device is a syringe 1 . The pre-embedded tubular filter cartridge 9 is a PVC pipe, which is designed and constructed simultaneously with the constructed wetland. The part below the matrix interface 6 of the PVC pipe is uniformly and densely perforated (density 4-9 holes/cm ² , hole diameter 1-5mm), and a layer of geotextile 4 with good water permeability is wrapped on the surface to maintain pore water with the surrounding wetland matrix. Connect freely. It is advisable that the upper end of the PVC pipe is more than 20cm higher than the highest water level of the wetland.

when using it:

(1) Insert the benchmark pole 3 into the PVC pipe to an initial depth of c-a, as shown in Figure 1. Then according to the sampling requirements, move the benchmarks down in turn to collect samples at different depths below the matrix interface layer. Water samples above the matrix interface layer can be collected in layers by moving the benchmark rod to the outside of the PVC pipe.

(2) Transfer the water sample in the syringe to the sampling bottle.

(3) Repeat step (2).

(4) After the sample collection is completed, it should be sealed and stored and sent to the laboratory for analysis. When not sampling at ordinary times, cover the top of the PVC pipe with gauze to prevent debris from polluting the water body.

Claims (6)

1. artificial swamp pore water original position stratified sampler, it comprises mark post, and small hose and the draw-out device that is communicated with small hose is characterized in that described small hose is fixedly set on the mark post, described small hose lower end flushes with mark post 0 scale, and the upper end is communicated with draw-out device; Also be provided with pre-buried tubulose filter cylinder, the sealing of described tubulose filter cylinder bottom, uniform permeable hole on tubulose filter cylinder barrel is in tubulose filter cylinder barrel outside surface parcel geotextile.

2. artificial swamp pore water original position stratified sampler according to claim 1 is characterized in that described tubulose filter cylinder barrel is a pvc pipe.

3. artificial swamp pore water original position stratified sampler according to claim 2 is characterized in that tubulose filter cylinder bottom plug seal.

4. artificial swamp pore water original position stratified sampler according to claim 1 is characterized in that the aperture of the permeable hole on the described tubulose filter cylinder barrel is 1-5mm, and distribution density is 4-9 hole/cm ²

5. artificial swamp pore water original position stratified sampler according to claim 1 is characterized in that described draw-out device is a syringe.

6. artificial swamp pore water original position stratified sampler according to claim 1 is characterized in that the upper end of tubulose filter cylinder is higher than wetland maximum water level 20cm at least.

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