Regulable soil layered application type soil column test device

Abstract

The utility model discloses an adjustable soil layering application type soil column test device, belongs to the technical field of soil column tests, and solves the problem that an existing soil column test device is inconvenient for layered sampling. The soil column comprises a soil column pipe, a plurality of sleeves which are different in length and are arranged in a mutually-nested mode are contained in the soil column pipe, the top of each sleeve is provided with a limiting flange, and the bottom of each sleeve is provided with a water-permeable partition plate used for supporting soil. According to the utility model, the plurality of sleeves which are mutually nested are arranged, so that soil layering is realized, each layer of soil is kept independent and is prevented from being mixed in an experiment process, the soil can be conveniently sampled in a layered manner, and the device has higher controllability and repeatability and is convenient to use. The migration rule of pollutants in different media can be more accurately simulated and researched, and the reliability of an experimental result is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of soil column test, specifically relates to a kind of adjustable soil layering nested soil column test device. BACKGROUND

[0002] Soil column experiment is an important means to study the migration and transformation of pollutants in soil and groundwater. However, the existing soil column test device has some defects, such as difficult soil filling, difficult to guarantee the compaction degree of each layer of soil, etc., which limits the accuracy and reliability of the experiment.

[0003] Specifically, the soil column device is an experimental equipment for simulating the leaching process of soil. By simulating natural rainfall and soil water movement, the migration and transformation of substances in soil are studied. The traditional soil column device mainly consists of a support, a soil column pipe and a water supply device. The soil column pipe is a hollow cylinder, and the inside is divided into layers by multiple water-permeable partitions. This device has a simple structure and is easy to clean, but it has some problems such as difficult soil filling, difficult to achieve precise soil layering, and difficult to guarantee the compaction degree of each layer of soil.

[0004] To solve the above problems, a rotatable series soil column test device is disclosed in Chinese patent No. CN210720067U. In order to better achieve the use effect and realize multi-layer soil column experiment, at least one intermediate cylinder can be arranged between the top cylinder and the bottom cylinder. The structure of the intermediate cylinder is the same as that of the top cylinder, and the bottom is provided with a water leakage plate. The upper part of the water leakage plate is provided with a filter layer. One side of the intermediate cylinder is rotatably installed on the support rod. The top cylinder, the intermediate cylinder and the bottom cylinder are equal-diameter cylinders, and the connection between the cylinders is provided with a sealing ring on the outside. Although this rotatable series soil column test device realizes layering, the sealing between the multiple cylinders needs to be ensured by the sealing ring, which is not convenient for fixing and dismounting, and sampling is not convenient. UTILITY MODEL CONTENTS

[0005] In view of the above problems in the prior art, the utility model provides a soil column test device with adjustable soil layering and nested application, which solves the problem of inconvenient layering sampling of the existing soil column test device.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A soil column test device with adjustable soil layering and nested application is provided, which includes a soil column pipe. The inside of the soil column pipe contains multiple sleeves with different lengths and nested with each other. The top of each sleeve is provided with a limiting flange, and the bottom of each sleeve is provided with a water-permeable partition for supporting soil.

[0008] In the scheme, by setting multiple sleeves nested with each other, the soil is respectively put into each sleeve, so that each layer of soil remains independent during the experiment process, prevents mixing, facilitates more accurate simulation and research on the migration rule of pollutants in different media, improves the reliability of experimental results, and at the same time, after the experiment is completed, the layered sampling of soil can be directly realized by taking out each sleeve, which is not only convenient for sampling, but also provides a solution for the later treatment and repair of pollutants.

[0009] Further, each sleeve is a telescopic cylinder, and each telescopic cylinder comprises a first cylinder and a second cylinder movably arranged in the bottom of the first cylinder. By adjusting the length of the telescopic cylinder, the height of each layer of soil can be changed as needed, so that the experimenter can more flexibly set the experimental conditions and adapt to different research needs.

[0010] Further, the bottom surface of the first cylinder is provided with an annular channel, and the second cylinder is inserted into the annular channel and threadedly connected with the annular channel. The threaded connection of the first cylinder and the second cylinder enables the second cylinder to stably rotate and move up and down in the first cylinder, facilitating the adjustment of the height of the soil layer while ensuring the stability of the structure. The annular channel avoids interference of the soil with the threaded connection of the first cylinder and the second cylinder.

[0011] Further, the bottom surface of the first cylinder is provided with an annular channel, and the outer wall of the second cylinder is provided with a friction layer, and the second cylinder is inserted into the annular channel and the friction layer is extruded with the outer wall of the annular channel. Since the weight of each layer of soil in the soil column test is small, increasing the friction between the second cylinder and the annular channel through the friction layer can support the soil and prevent loosening while facilitating adjustment.

[0012] Further, the friction layer is a rubber layer or a polyurethane layer.

[0013] Further, each water-permeable partition is provided with a water-permeable membrane. The water-permeable membrane can allow water to permeate while preventing soil particles from flowing away, ensuring that cross-contamination does not occur between layers of soil, and improving the accuracy of experimental data.

[0014] Further, a plurality of liquid injection ports are provided on the outer wall of the soil column pipe in the vertical direction. These liquid injection ports allow liquid to be injected directly at different depths, which can simulate the process of rainfall or irrigation and better study the migration rule of pollutants in different depths of soil.

[0015] Further, the soil column pipe is vertically fixed on the top surface of the base, and the bottom of the soil column pipe penetrates through the top surface of the base and communicates with the collector. The collector facilitates the collection of liquid seeping from the soil column pipe, simplifies the cleaning work after the experiment, and helps the analysis of the seepage liquid.

[0016] Further, a liquid injection tank is detachably arranged on the top opening of the soil column pipe, and an adjusting valve is arranged on the top opening of the liquid injection tank.

[0017] Further, the lengths of the plurality of sleeves gradually increase in the vertical downward direction. The arrangement of the plurality of sleeves in this way ensures the stability of the device during installation, and also facilitates the sequential removal of the uppermost sleeve, facilitating layered sampling and cleaning operations.

[0018] The utility model discloses a kind of adjustable soil layered sleeve type soil column test devices, and its beneficial effects are as follows:

[0019] The utility model discloses a plurality of sleeves arranged in each other not only realize soil layering, ensure that each layer of soil remains independent during the experiment, prevent mixing, and can conveniently carry out layered sampling to soil, with higher controllability and repeatability, facilitate more accurately simulate and study the migration law of pollutant in different medium, improve the reliability of experimental results. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure diagram of adjustable soil layered sleeve type soil column test device;

[0021] Figure 2 It is an explosion diagram of adjustable soil layered sleeve type soil column test device;

[0022] Wherein: 1, soil column pipe;11, liquid injection port;12, collector;2, sleeve;21, limiting flange;22, water-permeable partition;23, first cylinder;24, second cylinder;3, liquid injection tank. DETAILED DESCRIPTION

[0023] The specific embodiments of the utility model are described below, so that the person skilled in the art can understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific embodiments, for the person skilled in the ordinary skill in the art, as long as various changes are within the spirit and scope of the utility model defined and determined by the appended claims, these changes are obvious, all the utility model creations using the utility model concept are within the scope of protection.

[0024] Reference Figure 1 And Figure 2 The embodiment provides a kind of adjustable soil layered sleeve type soil column test device, including soil column pipe 1 and multiple sleeves 2.

[0025] The soil column tube 1 is a hollow cylinder structure with an open top, and is vertically fixed on the top surface of the base, and the bottom of the soil column tube 1 communicates with the collector 12 through the top surface of the base. The collector 12 is a funnel structure and is provided with a control valve at the bottom, and is used to collect the liquid seeped from the soil column tube 1.

[0026] A plurality of liquid injection ports 11 are arranged on the outer wall of the soil column tube 1 in the vertical direction. These liquid injection ports 11 allow direct injection of liquid at different depths, can simulate the rainfall or irrigation process, and better study the migration rules of pollutants in soil at different depths.

[0027] A plurality of sleeves 2 are arranged in the interior of the soil column tube 1 and are nested with each other, the top of each sleeve 2 is provided with a limiting flange 21, and the bottom of each sleeve 2 is provided with a water-permeable partition plate 22 for supporting soil. The water-permeable partition plate 22 is provided with a water-permeable membrane. The water-permeable membrane can allow water to permeate and prevent soil particles from flowing away, and can prevent cross contamination between different layers of soil, and can improve the accuracy of experimental data.

[0028] As a further structure of the soil column tube 1, the top opening of the soil column tube 1 is communicated with a liquid injection tank 3, the top opening of the liquid injection tank 3 is provided with an adjusting valve, and the bottom of the soil column tube 1 is provided with a water-permeable partition plate 22. The combination of the liquid injection tank 3 and the adjusting valve can control the flow rate and amount of water, simulate different rainfall intensities, and increase the controllability of the experimental conditions.

[0029] As a further scheme of the embodiment, the lengths of the plurality of sleeves 2 gradually increase in the vertical downward direction. The arrangement of the plurality of sleeves 2 at different heights ensures the stability of the device during installation, and facilitates the removal of the uppermost sleeve 2, and facilitates the operation of layered sampling and cleaning.

[0030] As a specific structure of the sleeve 2, each sleeve 2 is a telescopic cylinder, and each telescopic cylinder includes a first cylinder 23 and a second cylinder 24 movably arranged in the bottom of the first cylinder 23. By adjusting the length of the telescopic cylinder, the height of each layer of soil can be changed as needed, so that the experimenter can more flexibly set the experimental conditions to adapt to different research needs.

[0031] The embodiment provides two structures of the telescopic cylinder. As one scheme of the telescopic cylinder, the bottom surface of the first cylinder 23 is provided with an annular channel, and the second cylinder 24 is inserted into the annular channel and is threadedly connected with the annular channel. The threaded connection of the first cylinder 23 and the second cylinder 24 enables the second cylinder 24 to stably rotate and move up and down in the first cylinder 23, facilitates the adjustment of the height of the soil layer, and ensures the stability of the structure. The arrangement of the annular channel avoids the interference of the soil with the threaded connection of the first cylinder 23 and the second cylinder 24.

[0032] As another scheme of the telescopic cylinder, the bottom surface of the first cylinder 23 is provided with an annular channel, the outer wall of the second cylinder 24 is provided with a friction layer, the second cylinder 24 is inserted into the annular channel, and the friction layer is extruded with the outer wall of the annular channel. The friction layer is a rubber layer or a polyurethane layer. Considering that the weight of each layer of soil in the soil column test is small, the friction between the second cylinder 24 and the annular channel is increased through the friction layer to support the soil, prevent loosening, and facilitate adjustment.

[0033] In summary, the beneficial effects of the present scheme are:

[0034] By setting multiple sleeves 2 nested with each other, the soil is respectively placed in each sleeve 2, so that each layer of soil remains independent during the experiment, prevents mixing, facilitates more accurate simulation and research on the migration rule of pollutants in different media, improves the reliability of the experimental results, and directly realizes the layered sampling of the soil by taking out each sleeve 2 after the experiment, which is not only convenient for sampling, but also provides a solution for the later treatment and repair of the pollutant approach.

[0035] Although the specific embodiments of the utility model are described in detail in combination with the drawings, it should not be understood as limiting the protection scope of the patent. Various modifications and changes made by those skilled in the art within the scope described in the claims are still within the protection scope of the patent.

Claims

1. A soil layering and adjustable sleeve type soil column test device, characterized by, The utility model relates to a soil column pipe (1), the inside of the soil column pipe (1) contains a plurality of sleeves (2) of different lengths and mutual nesting, the top of each sleeve (2) is provided with a limiting flange (21), and the bottom of each sleeve (2) is provided with a water-permeable partition (22) for supporting soil.

2. The controllable soil layering jacketed soil column test apparatus according to claim 1, wherein, Each sleeve (2) is a telescopic cylinder, and each telescopic cylinder comprises a first cylinder (23) and a second cylinder (24) movably arranged in the bottom of the first cylinder (23).

3. The controllable soil layering jacketed soil column test apparatus according to claim 2, wherein, The bottom surface of the first cylinder (23) is provided with an annular channel, and the second cylinder (24) is inserted into the annular channel and is threadedly connected with the annular channel.

4. The controllable soil layering jacketed soil column test apparatus according to claim 2, wherein The bottom surface of the first cylinder (23) is provided with an annular channel, and the outer wall of the second cylinder (24) is provided with a friction layer, the second cylinder (24) is inserted into the annular channel, and the friction layer and the outer wall of the annular channel are extruded with each other.

5. The controllable soil layering jacketed soil column test apparatus according to claim 4, wherein, The friction layer is a rubber layer or a polyurethane layer.

6. The controllable soil layering jacketed soil column test apparatus according to claim 1, wherein, Each water-permeable partition (22) is provided with a water-permeable membrane.

7. The controllable soil layering jacketed soil column test apparatus according to claim 1, wherein, The outer wall of the soil column pipe (1) is provided with a plurality of liquid injection openings (11) in the vertical direction.

8. The controllable soil layering jacketed soil column test apparatus according to claim 1, wherein, The soil column pipe (1) is vertically fixed on the top surface of a base, and the bottom of the soil column pipe (1) penetrates through the top surface of the base and is communicated with a collector (12).

9. The controllable soil layering jacketed soil column test apparatus according to claim 1, wherein, A liquid injection tank (3) is detachably arranged on the top opening of the soil column pipe (1), and the top opening of the liquid injection tank (3) is provided with an adjusting valve.

10. The controllable soil layering jacketed soil column test apparatus of claim 1, wherein, The lengths of the plurality of sleeves (2) gradually increase in the vertical downward direction.

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