Portable high-precision soil column evaporation device

Abstract

The utility model discloses a portable high-precision soil column evaporation device, which relates to the technical field of environmental ecology and comprises a soil column cylinder, a water supply cylinder, a soil column cylinder water supply valve, a water supply cylinder water supply valve and a weighing device. The top of the soil column cylinder is open; the top of the water supply cylinder is closed and is provided with a vent pipe; the soil column cylinder and the water supply cylinder are arranged on the weighing device; a soil column cylinder water supply valve is arranged at the lower part of the soil column cylinder; a water supply cylinder water supply valve is arranged at the lower part of the water supply cylinder; the soil column cylinder water supply valve is communicated with the water supply cylinder water supply valve through a pipeline; the weighing device is in communication connection with the computer. The portable high-precision soil column evaporation device disclosed by the utility model can accurately measure the evaporation capacity of a soil column, accurately control the underground water level to be maintained at a preset height, continuously measure the soil moisture evaporation capacity, automatically record and store the soil column moisture evaporation capacity and store data in a computer, so that the workload of testers is reduced, the test cost is saved, and the test efficiency is improved. The method has great advantages in ecological environment research.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of environmental ecology technology, in particular to a kind of light high-precision soil column evaporation device. BACKGROUND

[0002] Soil moisture evaporation is an important part of land water vapor circulation. After atmospheric precipitation reaches the ground, part of it forms runoff and flows into rivers and lakes, part of it seeps into the soil to form soil water, and part of it returns to the atmosphere through water vapor evaporation. Soil water seeping into the soil is the water on which vegetation depends and is the main source of groundwater recharge. On land not completely covered by vegetation, part of the soil water directly returns to the atmosphere through soil moisture evaporation. In arid regions, the surface vegetation is sparse, the proportion of bare soil is high, and the evaporation potential is large. The amount of water returned to the atmosphere by soil moisture evaporation exceeds 60% of the amount of precipitation. Soil moisture evaporation has become an important research content in the study of land water vapor circulation in arid regions.

[0003] In the study of soil moisture evaporation, soil column evaporation test is the most common research method. For example, the patent with publication number CN112666039A discloses a soil column evaporation test device under the action of temperature gradient. Soil column evaporation test is used to simulate the process of soil moisture evaporation, reveal the mechanism of soil moisture transport, and form a soil moisture evaporation model. In soil column evaporation test, the speed of soil moisture evaporation is slow, the daily evaporation amount is small, and the soil column test device cannot measure the hourly soil moisture evaporation amount.

[0004] Currently, most soil column test devices use an enlarged soil column surface to increase the daily soil evaporation amount. However, enlarging the soil column surface increases the weight of the soil column, which requires a larger range weighing device. The accuracy of the large range weighing device is low, and the hourly evaporation amount of the soil column cannot be accurately measured. Currently, the measurement accuracy of the soil column test device is the most critical factor affecting the results of the soil column test. In addition, the current soil column test device cannot accurately control the water level. During the soil column evaporation process, the water level of the soil column continuously decreases, causing the movement distance of water to increase. This reduces the amount of soil moisture evaporation and makes the soil moisture evaporation process more complex, affecting the revelation of the mechanism of soil moisture transport. SUMMARY

[0005] The utility model discloses a light high-precision soil column evaporation device to solve the problem of insufficient measurement accuracy and inability to accurately control the underground water level in current soil column tests. The device improves the accuracy of soil column evaporation tests, reduces the cost of soil column evaporation test devices, shortens the time of soil column evaporation tests, and saves the cost of soil column evaporation tests.

[0006] To achieve the above-mentioned purpose, the utility model provides the following scheme:

[0007] The utility model provides a kind of portable high-precision soil column evaporation device, including soil column cylinder, water supply cylinder, soil column cylinder water supply valve, water supply cylinder water supply valve and weighing device;The top of the soil column cylinder is open setting;The top of the water supply cylinder is closed setting and is provided with air pipe;The soil column cylinder and the water supply cylinder are all set on the weighing device;The lower part of the soil column cylinder is provided with the soil column cylinder water supply valve, and the lower part of the water supply cylinder is provided with the water supply cylinder water supply valve;The soil column cylinder water supply valve and the water supply cylinder water supply valve are connected by pipeline;The weighing device is connected with computer communication.

[0008] Optionally, the soil column cylinder is a cylindrical tube.

[0009] Optionally, the water supply cylinder is a cylindrical tube.

[0010] Optionally, the weighing device is a high-precision electronic scale.

[0011] Optionally, the soil column cylinder and the water supply cylinder are both made of acrylic material.

[0012] Optionally, the height of the soil column cylinder is 200mm, the inner diameter is 90mm, and the wall thickness is 5mm.

[0013] Optionally, the height of the water supply cylinder is 250mm, the inner diameter is 90mm, and the wall thickness is 5mm.

[0014] Optionally, the bottom end of the air pipe extends into the water supply cylinder by 200mm, and the top end of the air pipe extends out of the water supply cylinder by 50mm.

[0015] Optionally, the top of the water supply cylinder is provided with a water inlet, and a soft rubber plug is arranged on the water inlet.

[0016] Optionally, the soil column cylinder water supply valve and the water supply cylinder water supply valve are connected by a rubber tube.

[0017] The utility model has the following technical effects compared with the prior art:

[0018] The portable high-precision soil column evaporation device can accurately measure the hourly evaporation of the soil column, accurately control the underground water level to maintain a preset height, continuously measure the soil moisture evaporation, automatically record and store the soil moisture evaporation, save the data to the computer, reduce the workload of the test personnel, save the test cost, and have great advantages in ecological environment research. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0020] Figure 1 A front view of the portable high-precision soil column evaporation test device provided by the present application is shown in the figure.

[0021] Figure 2 A plan view of the portable high-precision soil column evaporation test device provided by the present application is shown in the figure.

[0022] 1, soil column cylinder; 2, soil column cylinder water supply valve; 3, water supply cylinder; 4, soft rubber plug; 5, air pipe; 6, water supply cylinder water supply valve; 7, high-precision electronic scale. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail in combination with the drawings and specific embodiments.

[0025] As shown in Figure 1 and 2 The present embodiment provides a portable high-precision soil column evaporation device, which comprises a soil column cylinder 1, a water supply cylinder 3, a soil column cylinder water supply valve 2, a water supply cylinder water supply valve 6 and a high-precision electronic scale 7.

[0026] The soil column cylinder 1 is made of transparent acrylic material. The height of the soil column cylinder 1 is 200 mm, the inner diameter is 90 mm, and the wall thickness is 5 mm. The bottom of the soil column cylinder 1 is closed with an acrylic plate, and the top is open. The soil column cylinder 1 is filled with test soil inside, which is used for soil moisture test. A copper soil column cylinder water supply valve 2 is installed at the lower part of the soil column cylinder 1, 25 mm away from the lower bottom surface of the soil column cylinder 1, for water supply for the test soil column.

[0027] The water supply cylinder 3 is made of transparent acrylic material. The water supply cylinder 3 is 250mm high, 90mm in inner diameter and 5mm in wall thickness. The upper and lower bottom surfaces of the water supply cylinder 3 are closed by acrylic plates. A water adding hole with a diameter of 20mm is formed in the upper bottom surface of the water supply cylinder 3 for adding test water into the stable water supply device. The water adding hole is tightly plugged by a soft rubber plug 4 after water is added, so as to prevent air leakage. An acrylic air pipe 5 is installed on the top of the water supply cylinder 3. The air pipe 5 protrudes 50mm above the upper bottom surface and extends into the water supply cylinder 3 by 200mm. The diameter of the air pipe 5 is 8mm. The air pipe 5 is sealed to the top of the water supply cylinder 3 by glue, so as to prevent air leakage. A water supply valve 6 is installed on the lower part of the water supply cylinder 3, 25mm away from the lower bottom surface of the water supply cylinder 3. The water supply valve 2 of the soil column cylinder and the water supply valve 6 of the water supply cylinder are connected by a rubber pipe, so as to continuously supply water to the soil column.

[0028] The maximum range of the high-precision electronic scale 7 is 10kg, and the measurement accuracy is 0.01g. The electronic scale is connected to the computer through a R232 communication data line. A program is written on the computer to automatically collect and store weight data.

[0029] From the implementation effect, the portable high-precision soil column evaporation test device in the embodiment has a soil surface area of 6358.5mm 2 The measurement accuracy of the evaporation amount reaches 0.01g, and the hourly evaporation amount of the soil column can be accurately measured. The opening degree of the water supply valve 2 of the soil column cylinder and the water supply valve 6 of the water supply cylinder can be controlled to accurately maintain the underground water level at a height of about 150mm. The soil water evaporation amount can be continuously measured by the computer and the high-precision electronic scale, and the soil water evaporation amount can be automatically recorded and stored, and the data can be saved to the computer, so as to reduce the workload of the test personnel and save the test cost. The soil column evaporation test device has great advantages in ecological environment research.

[0030] It should be noted that, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, and any reference signs in the claims should not be regarded as limiting the claims.

[0031] The principle and implementation mode of the present application are described in the specification by using specific examples, and the above examples are only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, the specific implementation mode and application range will be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A lightweight, high-precision soil column evaporation device, characterized in that, The system includes a soil column, a water supply cylinder, a water supply valve for the soil column, a water supply valve for the water supply cylinder, and a weighing device. The top of the soil column is open. The top of the water supply cylinder is closed and equipped with a vent pipe. Both the soil column and the water supply cylinder are mounted on the weighing device. The soil column has a water supply valve at its lower part, and the water supply cylinder has a water supply valve at its lower part. The soil column and water supply cylinder are connected by a pipeline. The weighing device is connected to a computer for communication.

2. The lightweight, high-precision soil column evaporation device according to claim 1, characterized in that, The soil column is a cylindrical tube.

3. The lightweight, high-precision soil column evaporation device according to claim 1, characterized in that, The water supply cylinder is a cylindrical tube.

4. The lightweight, high-precision soil column evaporation device according to claim 1, characterized in that, The weighing device is a high-precision electronic scale.

5. The lightweight, high-precision soil column evaporation device according to claim 1, characterized in that, Both the soil column and the water supply cylinder are made of acrylic material.

6. The lightweight, high-precision soil column evaporation device according to claim 1, characterized in that, The soil column has a height of 200mm, an inner diameter of 90mm, and a wall thickness of 5mm.

7. The lightweight, high-precision soil column evaporation device according to claim 1, characterized in that, The water supply cylinder has a height of 250mm, an inner diameter of 90mm, and a wall thickness of 5mm.

8. The lightweight, high-precision soil column evaporation device according to claim 7, characterized in that, The bottom end of the vent pipe extends 200mm into the water supply cylinder, and the top end of the vent pipe extends 50mm out of the water supply cylinder.

9. The lightweight, high-precision soil column evaporation device according to claim 1, characterized in that, The top of the water supply cylinder is provided with a water inlet, and a soft rubber stopper is provided on the water inlet.

10. The lightweight, high-precision soil column evaporation device according to claim 1, characterized in that, The water supply valve of the soil column and the water supply valve of the water supply cylinder are connected by a rubber tube.

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