A groundwater sampling system

Abstract

The present invention belongs to the field of groundwater sampling devices, and specifically relates to a groundwater sampling system, including a water extractor and a winch for the water extractor below, wherein a collection bottle is provided on the water extractor, and the water extractor includes a bracket plate, a detachment airbag and a force-applying airbag, wherein the detachment airbag and the force-applying airbag are respectively connected to an air pump, wherein the detachment airbag is arranged on the front side of the bracket plate, and the force-applying airbag is arranged on the rear side of the bracket plate, wherein a sampling tube is arranged on the front side of the bracket plate, and the collection bottle is arranged on the rear side of the bracket plate, and the sampling tube passes through the bracket plate and extends into the collection bottle. The water extractor of the present invention inserts the collection tube into the well wall for sampling by cooperating with the detachment airbag and the force-applying airbag to avoid mixing of seepage water from each aquifer, thereby helping to improve the sampling accuracy of the water body. The sampling system of the present invention has a simple structure, is easy to control, and has a high sampling efficiency. It can collect water samples from aquifers of different depths in the sampling well, thereby helping to reduce sampling costs and being suitable for large-scale promotion and application.

Description

Technical Field

[0001] The invention belongs to the field of groundwater sampling devices, and in particular relates to a groundwater sampling system. Background Art

[0002] Groundwater sampling usually involves building special sampling wells based on the area being measured. In order for the aquifer water to flow into the well, no support pipes need to be laid in the aquifer, allowing the water from the aquifer to seep into the well cavity, where it can then be sampled by pumping or lowering a water collector. However, the groundwater seeping into the well cavity can be considered a mixed water body from aquifers at different depths. In order to study, for example, the infiltration depth of ground pollutants or the water quality of aquifers at different depths, stratified sampling is required. Currently, sampling of aquifer water is mainly carried out by setting up sampling wells of different depths in the measured area. However, this method results in high initial construction costs for sampling and is not applicable in areas with less available land. Summary of the Invention

[0003] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a groundwater sampling system, which can sample water bodies in aquifers of different depths in one sampling well, has strong applicability, and can effectively reduce sampling costs.

[0004] The specific technical solution adopted in the present invention is:

[0005] A groundwater sampling system includes a water extractor and a winch for the water extractor below. A collection bottle is provided on the water extractor. The water extractor includes a bracket plate, a detachment airbag and a force-applying airbag. The detachment airbag and the force-applying airbag are respectively connected to an air pump. The detachment airbag is arranged on the front side of the bracket plate, and the force-applying airbag is arranged on the rear side of the bracket plate. A sampling tube is arranged on the front side of the bracket plate, and the collection bottle is arranged on the rear side of the bracket plate. The sampling tube passes through the bracket plate and extends into the collection bottle.

[0006] The detachable airbags are strip-shaped and arranged in two groups side by side along the vertical direction of the support plate, and the sampling tube is arranged between the two groups of detachable airbags.

[0007] The force-applying airbags are strip-shaped and arranged in two groups side by side along the vertical direction of the bracket plate, and the collection bottle is arranged between the two groups of force-applying airbags.

[0008] The sampling tube is provided with a fixed clip and a threaded clip. The fixed clip is fixedly connected to the sampling tube. The sampling tube passes through the bracket plate from back to front. The threaded clip is arranged on the front side of the bracket plate and is threadedly connected to the sampling tube to form a detachable clamping fit.

[0009] The end of the sampling tube is provided with a water inlet filtering hole.

[0010] The air inlet of the force-applying airbag is connected to the air pump via a first vent valve, the air deflation port of the force-applying airbag is connected to the first deflation valve, the air inlet of the detachment airbag is connected to the air pump via a second vent valve, and the air deflation port of the detachment airbag is connected to the second deflation valve.

[0011] The collecting bottle is arranged in a fixing groove on the rear side of the bracket plate, and the collecting bottle is also connected to an air pressure balance pipe.

[0012] Also included are sampling methods based on groundwater sampling systems:

[0013] a. According to the depth interval required for on-site measurement, pre-install the collection bottle and collection tube on the bracket plate to complete the assembly of the water collector;

[0014] b. Inflate the detached airbag to cover the sampling tube, and lower the water collector to the predetermined depth of the sampling well by a winch;

[0015] c. The force-applying airbag is inflated until both the force-applying airbag and the detaching airbag are in contact with and squeeze the wall of the sampling well;

[0016] d. The force-applying airbag continues to inflate, while the airbag is released. Under the push of the force-applying airbag, the sampling tube is inserted into the well wall for sampling;

[0017] e. After the sampling is completed, the airbag is deflated and the airbag is inflated at the same time. The sampling tube is pulled out from the well wall and the winch is used to lift the water collector to complete the sampling work.

[0018] The beneficial effects of the present invention are:

[0019] The water collector of the present invention inserts the collection tube into the well wall for sampling by cooperating with the detachment airbag and the force-applying airbag, thereby avoiding the mixing of seepage water from various aquifers, and helping to improve the accuracy of water sampling. The sampling system of the present invention has a simple structure, convenient control, and high sampling efficiency. It can collect water samples from aquifers at different depths in the sampling well, helps to reduce sampling costs, and is suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the present invention when in use;

[0021] Figure 2 It is a structural schematic diagram of the water dispenser of the present invention;

[0022] Figure 3 A schematic diagram of the air path connecting the detachment airbag and the force-applying airbag to the air pump;

[0023] Figure 4 Schematic diagram of the structure of the sampling tube;

[0024] Figure 5 This is a schematic diagram of the airbag being released and the airbag applying force to squeeze the well wall;

[0025] Figure 6 This is a schematic diagram of the sampling tube inserted into the well wall;

[0026] In the attached figure, 1, winch, 2, collection bottle, 3, bracket plate, 4, detachment airbag, 5, force-applying airbag, 6, air pump, 7, sampling tube, 8, fixing clip, 9, threaded clip, 10, air pressure balance tube. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0028] Specific implementation examples Figure 1 and Figure 2 As shown, the present invention is a groundwater sampling system, including a water collector and a winch 1 for the water collector below, a collection bottle 2 is provided on the water collector, and the water collector includes a bracket plate 3, a separation airbag 4 and a force airbag 5, the separation airbag 4 and the force airbag 5 are respectively connected to an air pump 6, the separation airbag 4 is arranged on the front side of the bracket plate 3, the force airbag 5 is arranged on the rear side of the bracket plate 3, the front side of the bracket plate 3 is provided with a sampling tube 7, the collection bottle 2 is arranged on the rear side of the bracket plate 3, and the sampling tube 7 passes through the bracket plate 3 and extends into the collection bottle 2.

[0029] When the sampling system of the present invention is used, the sampling tube 7 is shielded and protected by pre-inflating the detached airbag 4 to prevent it from scraping against the well wall during the lifting process, causing blockage and wear, and also to prevent it from being rubbed with impurities, thereby ensuring a high-precision sampling effect.

[0030] Further, such as Figure 2 and Figure 5 As shown, the detachable airbags 4 are strip-shaped and arranged in two groups side by side along the vertical direction of the support plate 3 , and the sampling tube 7 is arranged between the two groups of detachable airbags 4 .

[0031] The two groups of detached air bags 4 clamp the sampling tube 7 in the inflated state, ensuring that the sampling tube 7 does not contact the external well wall and ensures relative cleanliness during the lifting process. At the same time, the two groups of detached air bags 4 keep the bracket plate 3 balanced, so that the sampling tube 7 can be directly inserted into the well wall.

[0032] Furthermore, the force-applying airbags 5 are strip-shaped and arranged in two groups side by side along the vertical direction of the bracket plate 3 , and the collecting bottle 2 is arranged between the two groups of force-applying airbags 5 .

[0033] The bracket plate 3 is a vertical long strip structure, and the force-applying airbag 5 and the separation airbag 4 are both set to be long strips, so that when the airbag is inflated, the airbag is clamped and supported by the vertical well cavity, ensuring that the axis of the bracket plate 3 is parallel to the axis of the well cavity, and the sampling tubes 7 of various heights can be inserted into the well wall basically synchronously.

[0034] The support plate 3 is configured as an arc structure, such as Figure 5 and Figure 6 As shown, the inner side of the arc surrounds the force-applying airbag 5 and one side of the collection bottle 2. When the detachment airbag 4 is inflated and hung down, the bracket plate 3 and the well wall support slide down to prevent the bracket plate 3 from shaking and damaging the well wall, thereby preventing defects in the sampling well wall and reducing the risk of well wall collapse.

[0035] Further, such as Figure 4 As shown, the sampling tube 7 is provided with a fixed clip 8 and a threaded clip 9, the fixed clip 8 is fixedly connected to the sampling tube 7, the sampling tube 7 passes through the bracket plate 3 from back to front, and the threaded clip 9 is provided on the front side of the bracket plate 3 and is threadedly connected to the sampling tube 7 to form a detachable clamping fit.

[0036] The bracket plate 3 is provided with a plurality of through holes in the vertical direction, so as to facilitate on-site disassembly and flexible adjustment of the position of the sampling tube 7 on the bracket plate 3 through the threaded clip 9, thereby sampling aquifers at different depths.

[0037] Furthermore, a water inlet filter hole is provided at the end of the sampling tube 7. The sediment is partially filtered out through the water inlet filter hole, so that liquid water can flow into the sampling tube 7, avoiding clogging of the sampling tube 7 by sediment, and reducing the difficulty of equipment maintenance.

[0038] Furthermore, the air inlet of the force-applying airbag 5 is connected to the air pump 6 by means of a first vent valve, and the air deflation port of the force-applying airbag 5 is connected to the first deflation valve. The air inlet of the detachment airbag 4 is connected to the air pump 6 by means of a second vent valve, and the air deflation port of the detachment airbag 4 is connected to the second deflation valve.

[0039] When the force airbag 5 and the separation airbag 4 are inflated, the first ventilation valve and the second ventilation valve are opened, so that the corresponding airbags are connected to the air pump 6 for inflation. When deflation is required, the first deflation valve and the second deflation valve are opened for deflation. The first ventilation valve, the second ventilation valve, the first deflation valve and the second deflation valve are all solenoid valves. The switch valves of each airbag are independently set to facilitate flexible inflation adjustment of each force airbag 5 and the separation airbag 4, and the position of the bracket plate 3 is finally adjusted by the inflation and deflation of the airbags.

[0040] Furthermore, the collection bottle 2 is set in a fixed groove on the rear side of the bracket plate 3, and the collection bottle 2 is also connected to an air pressure balance pipe 10. The air pressure inside and outside the collection bottle 2 is balanced by the air pressure balance pipe 10 to ensure that the collected water flows smoothly into the collection bottle 2.

[0041] Also included are sampling methods based on groundwater sampling systems:

[0042] a. Pre-install the collection bottle 2 and the collection tube on the bracket plate 3 according to the depth interval required for on-site measurement to complete the assembly of the water dispenser;

[0043] b. Inflate the detached airbag 4 to cover the sampling tube 7, and lower the water collector to the predetermined depth of the sampling well by the winch 1;

[0044] c. Inflate the force-applying airbag 5 until both the force-applying airbag 5 and the separation airbag 4 are in contact with and squeeze the wall of the sampling well;

[0045] d. The force-applying airbag 5 continues to inflate, while the airbag 4 is released. Under the push of the force-applying airbag 5, the sampling tube 7 is inserted into the well wall for sampling;

[0046] e. After the sampling is completed, the force airbag 5 is deflated and the separation airbag 4 is inflated. The sampling tube 7 is pulled out from the well wall and the winch 1 lifts the water collector out to complete the sampling work.

[0047] After the water collector is assembled in step a, water can be released and pumped out of the sampling well to wash the well, thereby improving sampling accuracy. In step c, the well wall is squeezed, which, on the one hand, reinforces the well wall, and on the other hand, squeezes the well-washing water, making the collected water closer to the actual water condition of the aquifer, thereby improving sampling accuracy. The present invention can directly collect fresh water samples seeping from aquifers of different depths in the sampling well by directly inserting the air bag into the side wall of the sampling well with the sampling tube 7, thereby maximizing sampling accuracy and eliminating the need to set up multiple sampling wells, thereby helping to reduce sampling costs and being suitable for large-scale promotion and application.

Claims

1. A groundwater sampling system, comprising a water collector and a winch (1) for the water collector below, wherein a collection bottle (2) is provided on the water collector, and characterized in that: The water dispenser comprises a support plate (3), a detachable air bag (4) and a force-applying air bag (5), wherein the detachable air bag (4) and the force-applying air bag (5) are respectively connected to an air pump (6), the detachable air bag (4) is arranged on the front side of the support plate (3), the force-applying air bag (5) is arranged on the rear side of the support plate (3), a sampling tube (7) is arranged on the front side of the support plate (3), the collection bottle (2) is arranged on the rear side of the support plate (3), and the sampling tube (7) passes through the support plate (3) and extends into the collection bottle (2); The detachable airbags (4) are strip-shaped and arranged in two groups in a vertical direction of the support plate (3), and the sampling tube (7) is arranged between the two groups of detachable airbags (4); The force-applying airbags (5) are strip-shaped and arranged in two groups in a vertical direction of the support plate (3), and the collection bottle (2) is arranged between the two groups of force-applying airbags (5).

2. A groundwater sampling system according to claim 1, characterized in that: The sampling tube (7) is provided with a fixed clip (8) and a threaded clip (9), the fixed clip (8) is fixedly connected to the sampling tube (7), the sampling tube (7) passes through the bracket plate (3) from back to front, and the threaded clip (9) is provided on the front side of the bracket plate (3) and is threadedly connected to the sampling tube (7) to form a detachable clamping fit.

3. A groundwater sampling system according to claim 1, characterized in that: The end of the sampling tube (7) is provided with a water inlet filter hole.

4. A groundwater sampling system according to claim 1, characterized in that: The air inlet of the force-applying airbag (5) is connected to the air pump (6) via a first vent valve, and the air outlet of the force-applying airbag (5) is connected to the first air outlet valve. The air inlet of the separation airbag (4) is connected to the air pump (6) via a second vent valve, and the air outlet of the separation airbag (4) is connected to the second air outlet valve.

5. A groundwater sampling system according to claim 1, characterized in that: The collecting bottle (2) is arranged in a fixing groove on the rear side of the support plate (3), and the collecting bottle (2) is also connected to an air pressure balance pipe (10).

6. A groundwater sampling system according to claim 1, characterized in that: Also included are sampling methods based on groundwater sampling systems: a. Pre-install the collection bottle (2) and the collection tube on the bracket plate (3) according to the depth interval required for on-site measurement to complete the assembly of the water collector; b. Inflate the detached airbag (4) to cover the sampling tube (7), and lower the water collector to a predetermined depth in the sampling well by means of a winch (1); c. Inflate the force-applying airbag (5) until both the force-applying airbag (5) and the separation airbag (4) are in contact with and squeeze the wall of the sampling well; d. The force-applying airbag (5) continues to be inflated, while the airbag (4) is separated and deflated. Under the push of the force-applying airbag (5), the sampling tube (7) is inserted into the well wall for sampling; e. After the sampling is completed, the force airbag (5) is deflated and the separation airbag (4) is inflated at the same time, the sampling tube (7) is pulled out from the well wall, and the winch (1) lifts the water collector out to complete the sampling work.

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