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Manufacturing method of low-speed automatic sampling device for groundwater

发布日期:2020-01-07 13:11 Document serial number: 19641801 Release date: 2020-01-07 13:11
Manufacturing method of low-speed automatic sampling device for groundwater

The invention relates to the field of environmental monitoring, hydrogeology and natural resources, in particular to the standardized sampling of volatile organic compounds in groundwater, and in particular to a low-speed automatic sampling device for groundwater.



Background technique:

When sampling and detecting volatile organic compounds in groundwater, it is necessary to take 3-5 times the volume of the well to wash the well, replace the water body deposited in the well for a long time, and then extract the water sample for testing, and determine whether the sampling conditions are available according to the sampling standards. The traditional method is to manually extract the well water through a pump, and then perform multi-parameter detection (ph, temperature, conductivity, redox potential, dissolved oxygen, turbidity) on the well water, detect unqualified water samples and discard the qualified ones. Water samples were collected. Because the traditional methods are all done manually, there are problems such as long sampling time, large well washing volume, and low sampling efficiency. At the same time, the water disturbance is large and the volatile organic compounds in the water are lost, resulting in inaccurate detection results.

Aiming at the problems in related technologies, no effective solution has been proposed at present.



Technical realization elements:

In view of the above technical problems in the related art, the present invention proposes a low speed automatic sampling device for groundwater, which can solve the above problems.

To achieve the above technical objectives, the technical solution of the present invention is implemented as follows:

A low-speed automatic sampling device for groundwater. A low-speed water pump is installed in a water well, and a water level gauge is placed on the water surface. A water level gauge control cable is connected to the other end of the water level gauge, the water level gauge control cable is wound on a water level gauge reel, and the other end of the water level gauge control cable is connected to a central control unit. One end of the low-speed water pump is connected with a pumping pipe and an inflation pipe. The pumping pipe bypasses the pump spool and is connected with a three-way valve. The inflation pipe is wound on the pump spool and the other end of the inflation pipe is connected to the central control unit. The central control unit is connected with a multi-parameter detector and a display screen through a cable. The three-way valve is connected to the central control unit, the three-way valve is connected to the left side of the multi-parameter detector, a water sample collector is connected to the lower side of the three-way valve, and a waste water collector is connected to the lower side of the multi-parameter detector.

Further, the three-way valve and the multi-parameter detector are connected by a cable.

Further, the central control unit, three-way valve, multi-parameter detector, display screen, waste water collector and water sample collector are all installed in the ground controller.

The beneficial effects of the present invention are as follows: (1) the quality of the sample is improved, and turbidity and volatility can be reduced by applying low-speed well washing and sampling methods. Because turbidity no longer interferes with the determination of physical and chemical indicators, no sample filtration step is required, which further reduces the cost of sampling and analysis;

(2) Improve the accuracy and precision of samples, so that users can accurately judge the true trend of the physical and chemical indicators of collected groundwater samples, and avoid the supervision and unnecessary costs of repeated sampling to prevent sample contamination;

(3) Compared with traditional well washing and sampling with high flow rate, the system is more economical and convenient;

(4) Through low-speed sampling, reduce sediments entering the well, avoid the impact of large water pressure on the well wall, extend the service life of the well and reduce the need for well maintenance.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. For those of ordinary skill in the art, other embodiments may be obtained based on these drawings without paying creative effort.

FIG. 1 is a schematic structural diagram of a low-speed automatic sampling device for groundwater.

In the picture: 1. Low-speed water pump, 2. Water level gauge, 3. Water pump, 4. Water level gauge control cable, 5. Inflatable pipe, 6. Water level gauge coil, 7. Water pump coil, 8. Central control unit, 9. Three-way valve, 10. Multi-parameter detector, 11. Display screen, 12. Ground controller, 13. Wastewater collector, 14. Water sample collector.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of the present invention.

As shown in FIG. 1, a low-speed automatic sampling device for groundwater according to an embodiment of the present invention includes a low-speed water pump 1, a water level gauge 2, and a ground controller 12. The low-speed water pump 1 is installed in a water well, and the water level gauge 2 Place on water. A water level gauge control cable 4 is connected to the other end of the water level gauge 2, the water level gauge control cable 4 is wound on a water level gauge reel 6, and the other end of the water level gauge control cable 4 is connected to a central control unit 8. . A pumping pipe 3 and an inflation pipe 5 are connected to one end of the low-speed water pump 1. The pumping pipe 3 is connected to a three-way valve 9 bypassing the pump spool 7, and the inflatable pipe 5 is wound on the pump spool 7. The other end of the inflatable tube 5 is connected to the central control unit 8. The central control unit 8 is connected with a multi-parameter detector 10 and a display screen 11 through a cable. The three-way valve 9 is connected to the central control unit 8, the three-way valve 9 is connected to the left of the multi-parameter detector 10, and a water sample collector 14 is connected to the lower side of the three-way valve 9. A wastewater collector 13 is connected to the lower side of the multi-parameter detector 10. Groundwater pumps water samples from the well sieve at a low flow rate, and only draws groundwater samples from the area to be sampled instead of groundwater in the entire volume of the well.

In a specific embodiment of the present invention, the three-way valve 9 and the multi-parameter detector 10 are connected by a cable.

In a specific embodiment of the present invention, the central control unit 8, the three-way valve 9, the multi-parameter detector 10, the display screen 11, the waste water collector 13, and the water sample collection The controllers 14 are all installed in the ground controller 12.

In a specific embodiment of the present invention, groundwater pumps water samples from the well sieve at a low flow rate, and only extracts groundwater samples from the area to be sampled instead of groundwater in the entire well volume, which causes water disturbance in the well washing and sampling process and The effects of wells and surrounding formations are minimized, reducing sample turbidity.

In order to facilitate the understanding of the above technical solution of the present invention, the above technical solution of the present invention will be described in detail through specific use modes below.

In specific use, a low speed automatic sampling device for groundwater according to the present invention includes a low speed water pump 1, a water level gauge 2 and a ground controller 12, the low speed water pump 1 is installed in a water well, and the water level gauge 2 is placed on the water surface. . A water level gauge control cable 4 is connected to the other end of the water level gauge 2, the water level gauge control cable 4 is wound on a water level gauge reel 6, and the other end of the water level gauge control cable 4 is connected to a central control unit 8. . A pumping pipe 3 and an inflation pipe 5 are connected to one end of the low-speed water pump 1. The pumping pipe 3 is connected to a three-way valve 9 bypassing the pump spool 7, and the inflatable pipe 5 is wound on the pump spool 7. The other end of the inflatable tube 5 is connected to the central control unit 8. The central control unit 8 is connected with a multi-parameter detector 10 and a display screen 11 through a cable. The three-way valve 9 is connected to the central control unit 8, the three-way valve 9 is connected to the left of the multi-parameter detector 10, and a water sample collector 14 is connected to the lower side of the three-way valve 9. A wastewater collector 13 is connected to the lower side of the multi-parameter detector 10.

The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall be included in the present invention. Within the scope of protection.

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