CN211086294U - Earth pillar experimental device for simulating evaporation of underground water - Google Patents
Earth pillar experimental device for simulating evaporation of underground water Download PDFInfo
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- CN211086294U CN211086294U CN201922074047.3U CN201922074047U CN211086294U CN 211086294 U CN211086294 U CN 211086294U CN 201922074047 U CN201922074047 U CN 201922074047U CN 211086294 U CN211086294 U CN 211086294U
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Abstract
The utility model relates to the field of soil water environment research, in particular to a soil column experimental device for simulating groundwater evaporation, which comprises a soil column barrel, a water injection device, a base, a permeable plate and a water sample collecting device; the soil column barrel is of a cylindrical structure, one end of the soil column barrel is arranged on the base, the other end of the soil column barrel is provided with an opening at the top, the water permeable plate is arranged in the soil column barrel and close to the base, scale marks are arranged on the side wall of the soil column barrel, a plurality of water outlet holes and pressure measuring pipe holes are further arranged on the side wall of the soil column barrel, and the pressure measuring pipe holes are connected with pressure measuring pipes; a water inlet is arranged on the side wall between the bottom surface of the soil column barrel and the water permeable plate, and the water injection device is communicated with the water inlet through a pipeline; the water sample collecting device can be communicated with the water outlet hole through a pipeline and is used for collecting water samples; and a water leakage prevention device is arranged on the water outlet hole. The utility model has the advantages of being simple in structure and simple and convenient in operation, the device can accurately simulate the water environment in the saturated area in underground and package gas area to reflect the true process of groundwater evaporation, satisfy the experimental requirement.
Description
Technical Field
The utility model relates to a soil water environment research field especially relates to a soil column experimental apparatus of simulation groundwater evaporation.
Background
The evaporation of underground water is always the key research object in the field of hydrogeology research, and mainly means that one part of the underground water enters the atmosphere in a soil evaporation mode and the other part of the underground water is diffused by plants under the action of soil capillary tubes. If the groundwater level is shallow and the gap of the rock soil is large, the groundwater can be directly evaporated. In arid and semiarid regions in northwest, particularly desert regions, evaporation of shallow groundwater is an important way for groundwater excretion in the regions and is a key factor influencing the overall water environment of groundwater. Factors affecting groundwater evaporation are mainly: climate factors, soil, buried depth, vegetation conditions, and the like. The research on the water chemical migration rule in the groundwater evaporation process and the influence of various factors on the evaporation process has important significance in the research on the soil water evaporation phenomenon in the aspect of agriculture, the development and the utilization of groundwater, the ecological environment protection in arid regions and the like. Therefore, in order to explore the evaporation law of underground water under different influence factors, an experimental device capable of simulating the evaporation phenomenon of underground water is urgently needed to be designed.
Disclosure of Invention
For solving the problem that exists among the above-mentioned background art, the utility model provides a soil column experimental apparatus of simulation groundwater evaporation, its simple structure, easy and simple to handle, the device can accurately simulate the water environment in the saturated area in underground and package gas area to reflect the true process of groundwater evaporation, satisfy the experimental requirement.
The utility model provides a technical scheme of above-mentioned problem is: the utility model provides a soil column experimental apparatus of simulation groundwater evaporation which characterized in that:
comprises a soil pillar barrel, a water injection device, a base, a permeable plate and a water sample collecting device;
the soil column barrel is of a cylindrical structure, one end of the soil column barrel is arranged on the base, the other end of the soil column barrel is provided with an opening at the top, the water permeable plate is arranged in the soil column barrel and close to the base, scale marks are arranged on the side wall of the soil column barrel, a plurality of water outlet holes and pressure measuring pipe holes are further arranged on the side wall of the soil column barrel, and the pressure measuring pipe holes are connected with pressure measuring pipes; a water inlet is formed in the side wall between the soil column barrel base and the water permeable plate, and the water injection device is communicated with the water inlet through a pipeline; the water sample collecting device can be communicated with the water outlet hole through a pipeline and is used for collecting water samples;
and a water leakage prevention device is arranged on the water outlet hole.
Furthermore, a filter screen is arranged on the inner wall of the soil column barrel corresponding to the water outlet to prevent soil from entering the water outlet and causing the water outlet to be blocked.
Furthermore, a filter screen is arranged above the permeable plate to prevent soil particles from falling into the lower part of the permeable plate, and meanwhile, water can uniformly enter the soil column in the water saturation process.
Furthermore, the pressure measuring pipe is a right-angle guide pipe and uniformly extends upwards to a position which is flush with the top end of the earth pillar barrel.
Furthermore, the water outlet holes are formed in the side wall of the soil column barrel along the axial direction of the soil column barrel, and the distance between every two adjacent water outlet holes is equal; the pressure measuring pipe is arranged on one side, opposite to the water outlet holes, of the side wall of the soil column barrel, and the pressure measuring pipe hole is located in the middle of every two adjacent water outlet holes on the opposite side.
Furthermore, the water leakage prevention device is a hose which is connected with the water outlet hole, and a water stop clamp is arranged on the hose.
Furthermore, the base is a disc, an annular groove is formed in the disc, and the lower end of the soil column barrel is embedded into the annular groove.
Further, above-mentioned water sample collection device is the wide-necked glass bottle.
Furthermore, the permeable plate is evenly provided with permeable micropores.
Furthermore, the distance between the permeable plate and the bottom surface of the soil column barrel is 5 cm.
The utility model has the advantages that:
the utility model provides a soil column experimental device for simulating groundwater evaporation, which has simple structure and simple operation, and can accurately simulate the water environment of an underground saturated zone and an aeration zone, thereby reflecting the real process of groundwater evaporation and meeting the experimental requirements; and utilize the utility model discloses can be through the all sorts of variables that change external environment to explore the groundwater evaporation condition under the different external condition, solved traditional organic glass post height, difficult transport, earth pillar preparation and the inconvenient difficulty of later stage water sample collection.
Drawings
FIG. 1 is a schematic structural diagram of the soil column experimental device for simulating groundwater evaporation of the present invention.
The water-saving device comprises a soil column barrel 1, a water outlet hole 2, a water injection device 3, a base 4, a water permeable plate 5, a pressure measuring pipe 6, a scale mark 7, a water sample collecting device 8 and a water inlet 9.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Referring to fig. 1, an earth pillar experimental device for simulating groundwater evaporation comprises an earth pillar barrel 1, a water injection device 3, a base 4, a water permeable plate 5 and a water sample collecting device 8.
The pressure measuring pipes 6 are right-angle pipes and extend upwards to positions flush with the top end of the soil column barrel 1 in a unified mode, and when the water level in each pressure measuring pipe is consistent, the water level value is an accurate water level value.
The water leakage preventing device is a hose which is connected with the water outlet hole 2, and a water stopping clamp is arranged on the hose.
The base 4 is a glass plate disc, an annular groove is arranged on the glass plate disc, and the lower end of the soil column barrel 1 is embedded into the annular groove.
The diameter of the base 4 is 20cm, the thickness is 2cm, and the annular grooves distributed on the base are 5mm deep and 6mm wide. The outer diameter of the soil column barrel 1 is 15cm, and the barrel wall thickness is 6 mm.
The water injection device 3 is provided with an organic glass cover with an openable top end, the bottom and the four walls of the water tank are closed except for the water outlet hole, a water outlet is formed in the side wall of the lower portion of the water tank, and water injection is achieved by connecting the water tank and adjusting the height of the water tank. The wall thickness of 3 columnar water tanks in water injection device is 10mm, and the diameter is 40cm, and height 30cm places the saturated water progress of high control through the adjustment water tank, and saturated water adopts even saturated water many times.
The water sample collecting device 8 is a wide-mouth glass bottle.
Permeable micropores are uniformly formed in the permeable plate 5.
The distance between the permeable plate 5 and the bottom surface of the soil column barrel 1 is 5 cm.
Of course, the utility model discloses a device size can be adjusted according to different experimental needs.
As an optimal embodiment of the utility model, it is equipped with the filter screen to correspond water outlet department on 1 inner wall of soil column casing to prevent that soil from getting into apopore 2, lead to apopore 2 to block up. A filter screen is arranged above the water permeable plate 5 to prevent soil particles from falling into the lower part of the water permeable plate 5, and meanwhile, water can uniformly enter the soil column in the water saturation process.
As a preferred embodiment of the present invention, the plurality of water outlet holes 2 are arranged on the sidewall of the soil column casing 1 along the axial direction of the soil column casing 1, and the distances between two adjacent water outlet holes 2 are equal; the pressure measuring pipe 6 is arranged on one side, opposite to the water outlet holes 2, of the side wall of the soil column barrel 1, and the pressure measuring pipe hole is located in the middle of every two adjacent water outlet holes 2 on the opposite side. The distance between the water outlet hole 2 and the bottom surface of the soil column barrel 1 is 0cm, 10cm, 20cm, 30cm, 40cm and 50cm respectively, and the distance between the pressure measuring pipe hole on the opposite side and the bottom surface of the soil column barrel 1 is 5cm, 15cm, 25cm, 35cm, 45cm and 55cm respectively.
The utility model discloses the device is used for exploring the test device of different humidoments to groundwater evaporation influence for study in the evaporation process under different humiture conditions, the change of isotope, water chemistry characteristic and quality of water in the groundwater, concrete operation as follows:
(1) obtaining a plurality of representative natural soil samples through field investigation and sampling, and drying the soil samples in a drying oven at 105 ℃ to constant weight to remove water in the soil;
(2) placing the dried soil sample on an electronic scale, and drying at a certain dry density (such as 1.3 g/cm)3) Calculating the weight of the required soil according to the diameter of the pipe and the thickness of the saturated soil, adding water, uniformly stirring until the water content reaches a set water content (such as 15%), filling the soil into a plastic bag, sealing, standing for several hours to make the soil sample uniform, filling the soil sample with uniform water content into a soil column barrel 1 in multiple times (such as filling soil with the height of 5cm each time) and compacting, and controlling the soil filling progress according to a scale mark 7;
(3) water is fed from a water inlet 9, soil with a certain height (such as 60 cm) is saturated by using a water tank, whether the part of the soil column is saturated or not is judged by reading water level data by using a scale mark 7, if the water level data of a piezometer tube and the water tank are not changed and are flush after 24 hours, the lower soil column is considered to be a saturated water zone, and the upper 10cm soil column is an air-entrapping zone;
(4) putting the assembled soil column into a constant temperature and humidity box, setting a certain temperature and humidity by adjusting the intelligent constant temperature and humidity box, regularly observing the water level value of the pressure measuring pipe, taking out water samples of each layer from top to bottom through water outlets respectively when water saturated parts in the soil column are evaporated in a certain proportion (for example, the water level of the pressure measuring pipe 6 is reduced by 10cm, namely the water level of the pressure measuring pipe is at a position of 50 cm), and respectively measuring the isotope and water chemical characteristics of the unevaporated residual water samples of each layer;
(5) and (5) repeating the steps 1-4, adjusting the temperature and humidity of the constant temperature and humidity box, and setting the soil columns with the same structure but different temperatures or humidities for comparison test.
The constant temperature and humidity box used in the experiment adopts a 40A mortar maintenance box, the effective volume is 510mm × 620mm × 1230mm, the set temperature is 0-90 ℃, the precision is +/-2 ℃, the set humidity is 20-70%, and the precision is +/-5% RH, and the temperature and humidity of the air around the earth pillar barrel can be accurately controlled in the effective volume.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes made by the contents of the specification and the drawings are used for conversion, or directly or indirectly applied to other related system fields, and the same principle is included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a soil column experimental apparatus of simulation groundwater evaporation which characterized in that:
comprises a soil column barrel (1), a water injection device (3), a base (4), a permeable plate (5) and a water sample collecting device (8);
the soil column barrel (1) is of a cylindrical structure, one end of the soil column barrel is arranged on the base (4), the other end of the soil column barrel is open at the top, the water permeable plate (5) is arranged in the soil column barrel (1) and close to the base (4), scale marks (7) are arranged on the side wall of the soil column barrel (1), a plurality of water outlet holes (2) and pressure measuring pipe holes are further arranged on the side wall of the soil column barrel (1), and the pressure measuring pipe holes are connected with pressure measuring pipes (6); a water inlet (9) is formed in the side wall between the bottom end of the soil column barrel (1) and the water permeable plate (5), and the water injection device (3) is communicated with the water inlet (9) through a pipeline; the water sample collecting device (8) can be communicated with the water outlet (2) through a pipeline and is used for collecting water samples;
and a water leakage prevention device is arranged on the water outlet hole (2).
2. The soil column experimental facility for simulating groundwater evaporation as claimed in claim 1, wherein:
and a filter screen is arranged on the inner wall of the soil column barrel (1) corresponding to the water outlet hole (2).
3. The soil column experimental facility for simulating groundwater evaporation as claimed in claim 2, wherein:
a filter screen is arranged above the permeable plate (5).
4. The soil column experimental facility for simulating groundwater evaporation as claimed in claim 3, wherein:
the pressure measuring pipe (6) is a right-angle pipe and extends upwards uniformly to a position flush with the top end of the soil column casing (1).
5. A soil column experimental facility for simulating evaporation of groundwater according to any one of claims 1 to 4, wherein:
the water outlets (2) are arranged on the side wall of the soil column barrel (1) along the axial direction of the soil column barrel (1), and the distances between every two adjacent water outlets (2) are equal; the pressure measuring pipe (6) is arranged on one side, opposite to the water outlet holes (2), of the side wall of the soil column barrel (1), and the pressure measuring pipe holes are located in the middle of every two adjacent water outlet holes (2) on the opposite side.
6. The soil column experimental facility for simulating groundwater evaporation as claimed in claim 5, wherein:
the water leakage preventing device is a hose which is connected with the water outlet hole (2), and a water stopping clamp is arranged on the hose.
7. The soil column experimental facility for simulating groundwater evaporation as claimed in claim 6, wherein:
the base (4) is a disc, an annular groove is formed in the disc, and the lower end of the soil column barrel (1) is embedded into the annular groove.
8. The soil column experimental facility for simulating groundwater evaporation as claimed in claim 7, wherein:
the water sample collecting device (8) is a wide-mouth glass bottle.
9. The soil column experimental facility for simulating groundwater evaporation of claim 8, wherein:
permeable micropores are uniformly formed in the permeable plate (5).
10. The soil column experimental facility for simulating groundwater evaporation of claim 9, wherein:
the distance between the water permeable plate (5) and the bottom surface of the soil column barrel (1) is 5 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922074047.3U CN211086294U (en) | 2019-11-26 | 2019-11-26 | Earth pillar experimental device for simulating evaporation of underground water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922074047.3U CN211086294U (en) | 2019-11-26 | 2019-11-26 | Earth pillar experimental device for simulating evaporation of underground water |
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| Publication Number | Publication Date |
|---|---|
| CN211086294U true CN211086294U (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922074047.3U Expired - Fee Related CN211086294U (en) | 2019-11-26 | 2019-11-26 | Earth pillar experimental device for simulating evaporation of underground water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736822A (en) * | 2019-11-26 | 2020-01-31 | 长安大学 | method for simulating groundwater evaporation and soil column experimental device thereof |
| CN113207475A (en) * | 2021-04-19 | 2021-08-06 | 北京林业大学 | Experimental device for research plant roots growth situation |
-
2019
- 2019-11-26 CN CN201922074047.3U patent/CN211086294U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736822A (en) * | 2019-11-26 | 2020-01-31 | 长安大学 | method for simulating groundwater evaporation and soil column experimental device thereof |
| CN113207475A (en) * | 2021-04-19 | 2021-08-06 | 北京林业大学 | Experimental device for research plant roots growth situation |
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Granted publication date: 20200724 Termination date: 20201126 |
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