CN211603181U - Farmland salinity drip washing analogue means under concealed conduit drainage - Google Patents

Abstract

The utility model discloses a farmland salt leaching simulation device under the drainage of a hidden pipe, which comprises a plexiglass soil box, the interior of the plexiglass soil box is divided into several sub-regions, the interior of the plexiglass soil box is provided with a drainage pipe, each sub-region is There is an outlet at the bottom of the soil tank, several salt sensors are arranged in the soil filled in each sub-area, two telescopic bases are arranged on one side of the plexiglass soil box, and each telescopic base is provided with a Martens bottle: Bottle a and Martens bottle b, the bottom of Martens bottle a is communicated with the organic glass soil box through pipes, and the Martens bottle b is communicated with the bottom of the organic glass soil box. The utility model provides a new idea for the study of soil water and salt migration, and provides a simulation device for the research on farmland soil salt leaching under the condition of drainage. Various factors are fully considered, so that the device design can simulate the real situation as accurately as possible. Reduce the experimental error, and consider the maximum utilization of the device in the design, so as to realize the multi-purpose of one device.

Description

A simulation device for farmland salt leaching under the drainage of the dark pipe

technical field

The utility model belongs to the field of soil water and salt migration test equipment, in particular to a farmland salt leaching simulation device under the drainage of a hidden pipe.

Background technique

In the experimental study of soil water and salt transport, soil column test and soil box test are effective means to observe the movement process of soil water and salt and study the law of water and salt movement. The soil box test is mostly used to study the two-dimensional movement of water and salt, but at present most soil boxes are traditional simple soil boxes, which do not consider the situation when there are drainage conditions and the soil salt is not evenly distributed.

Utility model content

The purpose of the utility model is to provide a simulation device of farmland salt leaching under the drainage of a hidden pipe, which solves the problem of soil leaching of non-uniform salt content under the drainage condition.

The technical scheme adopted by the utility model is: a simulating device for farmland salt leaching under the drainage of a hidden pipe, comprising a plexiglass soil box, the interior of the plexiglass soil box is divided into several sub-regions, and the adjacent sub-regions are separated by detachable The plexiglass soil box is provided with a drainage pipe, the bottom of each sub-region is provided with an outlet, and the soil filled in each sub-region is provided with several salinity sensors. One side of the plexiglass soil box There are two telescopic bases, and each telescopic base is provided with a Martens bottle: Martens a and Martens b. The bottom of Martens a is connected to the organic glass soil box through pipes, and the Martens b is connected to the organic glass. Bottom connection of earth box.

The utility model is characterized in that:

The outlet of the bottom end of the martensitic bottle a is connected to a main pipe, one end of the main pipe is set on the plexiglass soil box, and a number of branch pipes connected to the main pipe are arranged in sequence along the radial direction of the main pipe, and all the branch pipes are arranged in each sub-pipe in turn. In the area, a control valve is arranged at one end of each branch pipe that communicates with the main pipe.

There is a control valve at the outlet, a filtrate collector is placed at the lower end of the outlet, and a filtrate collector is also placed at the bottom of the drain pipe.

The drainage pipe is arranged at a slope of 5‰, the drainage pipe is arranged in the inner middle of the plexiglass soil box, and one end of the outlet of the drainage pipe is perpendicular to the filtrate collector.

A plurality of holes are evenly opened on the drainage pipe, the drainage pipe is covered with a filter material layer and a water-permeable non-woven geotextile, and the water-permeable non-woven geotextile is arranged between the drainage pipe and the filter material layer.

Both sides of the bottom of the plexiglass earth box are fixed with a fixed base.

The beneficial effects of the farmland salt leaching simulation device under the underground pipe drainage of the utility model are as follows: the farmland salt washing simulation device under the hidden pipe drainage enriches the test simulation device in the technical field of soil water and salt migration test equipment, and is also a The research on the movement of soil water and salt provides a new idea. The salinity sensor is used to monitor the soil salinity in real time and reduce the disturbance to the soil. The device can carry out various experiments and realize multiple uses in one box.

Description of drawings

Fig. 1 is the structural representation of a kind of farmland salt leaching simulation device under the drainage of the utility model;

Fig. 2 is the top view of the simulation device of farmland salt leaching under a kind of hidden pipe drainage of the present invention;

FIG. 3 is a front view of a simulation device of farmland salt leaching under the drainage of a hidden pipe according to the present invention.

In the figure, 1. Plexiglass soil box, 2. Separation plate, 3. Drain pipe, 4. Salt sensor, 5. Martens bottle, 5-1. Martens bottle a, 5-2. Martens bottle b, 6. Telescopic base, 7. Main pipe, 8. Branch pipe, 9. Control valve, 10. Outlet, 11. Filtrate collector, 12. Fixed base, 13. Sub-area.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 , it is a schematic structural diagram of a farmland salt leaching simulation device under dark pipe drainage of the present invention, including a plexiglass soil box 1, and the interior of the plexiglass soil box 1 is provided with several freely detachable partition plates 2. The partition plate 2 divides the plexiglass soil box 1 into a plurality of sub-regions 13. A drain pipe 3 is installed in the middle of the inner side of the plexiglass soil box 1. The salinity sensor 4 is vertically and equally spaced in the soil filled in the plexiglass soil box 1. , two telescopic bases 6 are set on one side of the plexiglass soil box 1, and each telescopic base 6 is set with a Martens bottle 5: Martens bottle a5-1 and Martens bottle b5-2, as shown in Figure 2, the Martens bottle The bottom of a5-1 is connected to the main pipe 7, one end of the main pipe 7 is set on the plexiglass soil box 1, and several branch pipes 8 connected to the main pipe 7 are arranged in sequence along the radial direction of the main pipe 7, and all the branch pipes 8 are arranged in sequence In each sub-area 13, the main pipe 7 supplies water to the plexiglass soil box 1 through the branch pipes 8 respectively, the Martens bottle b5-2 is connected to the bottom inner side of the plexiglass soil box 1, and each branch pipe 8 is installed with a control valve 9. An outlet 10 is provided at the bottom of each sub-area 13 in the plexiglass soil box 1, and a control valve 9 is also provided at the outlet 10. The outlet 10 is controlled by the control valve 9, and the lower end of the outlet 10 is placed with filtrate. The collector 11 is also provided with a filtrate collector 11 at the lower end of the drain pipe 3 , and one end of the outlet of the drain pipe 3 is perpendicular to the filtrate collector 11 .

Both sides of the bottom of the plexiglass soil box 1 are fixedly connected to a fixed base 12 .

The interior of the plexiglass soil box 1 has several freely detachable partition plates 2 to divide it into a plurality of sub-regions 13. The partition plates 2 can be used for the simulation study of soil non-uniform salt leaching, and can also be used to separate independent soil columns. use. When carrying out the irrigation and leaching test of uniformly saline soil, the partition plate 2 is removed, and the entire plexiglass soil box 1 is used for the test, so that the two-dimensional dynamic change process of water and salt migration can be easily observed; In the irrigation and leaching test of the soil with uniform salinity, the soil with different salinity is separated by the partition plate 2 in the process of filling the soil. Press it to the specified height; when the one-dimensional soil column test is performed, all the partition plates 2 are installed, and multiple independent soil column tests can be carried out at the same time.

Drain pipe 3 is installed in the middle of the inner side of the plexiglass soil box 1 according to the slope of 5‰. The drainage pipe 3 is a PVC hard plastic pipe. There are several holes evenly opened on the pipe. Different grades of sand and gravel filter materials are used as filter layers to prevent soil particles from blocking the drainage pipe. When using the device of the utility model, one end of the drainage pipe 3 is blocked, and a filtrate collector is placed at the outlet of the other end of the drainage pipe 3 to collect the leaching liquid. The effluent can be used to determine the concentration and volume of the eluate later.

The salinity sensor 4 is used to automatically monitor the change process of soil salinity with the movement of water. The layout method is vertical and equidistant layout, which can obtain the overall salinity change of the soil during the irrigation and leaching process, and provide technical and data support for exploring the law of water and salt migration. .

The Martens bottle a5-1 is used to simulate irrigation and rinsing water supply. The water outlet at the lower end of the Martens bottle a5-1 is connected to the main pipe 7. The main pipe 7 is branched into the branch pipe 8 and enters the sub-area of the plexiglass soil box 1 respectively. There is an outlet 10 at the bottom of each sub-area, and a control valve 9 is installed in each branch pipe 8 and each outlet 10, and the valve can be switched on and off according to the test needs. When using the entire plexiglass soil box 1 for the two-dimensional motion study of water and salt migration, the control valve 9 of the outflow port 10 at the bottom of the sub-region is closed, and the branch pipe control valves 9 are all opened, thereby eliminating the need for the long length of the plexiglass soil box 1. , only rely on the test error caused by the uneven water seepage of one water inlet; when conducting a one-dimensional soil column test, only open the branch pipe control valve 9 and the outlet control valve 9 where the required soil column area 13 is located, The device is utilized to the maximum extent, and multiple uses of one device are realized.

Martens bottle b5-2 is used to simulate groundwater supply.

As shown in FIG. 3 , the Martens bottle 5 is fixed on the telescopic base 6 , and the height of the water surface above the soil layer and the buried depth of the groundwater can be controlled by adjusting the height of the telescopic base 6 .

The fixed base 12 is used to fix the limit plexiglass and plexiglass soil box 11 to prevent it from moving and falling.

The utility model is a simulation device of farmland salt leaching under the drainage of a hidden pipe, which provides a new idea for studying soil water and salt migration, and provides a simulation device for the research on farmland soil salt leaching under the condition of drainage, which fully considers various factors, so that the device design simulates the real situation as accurately as possible, reduces the experimental error, and considers the maximum utilization of the device in the design, so as to realize a multi-purpose device.

Claims (7)

1. The utility model provides a farmland salinity drip washing analogue means under dark pipe drainage, a serial communication port, including organic glass soil box (1), a plurality of subregion (13) is divided into to the inside of organic glass soil box (1), is separated by through detachable division board (2) between adjacent subregion (13), and the inside of organic glass soil box (1) is equipped with drain pipe (3), the bottom of every subregion (13) is provided with outlet (10), is equipped with a plurality of salinity sensor (4) in the soil that every subregion (13) was loaded, and one side of organic glass soil box (1) is equipped with two telescopic base (6), be equipped with mah's bottle (5) on every telescopic base (6): the device comprises a Marble's bottle a (5-1) and a Marble's bottle b (5-2), wherein the bottom of the Marble's bottle a (5-1) is communicated with the organic glass soil box (1) through a pipeline, and the Marble's bottle b (5-2) is communicated with the inner side of the bottom of the organic glass soil box (1).

2. The device for simulating farmland salinity leaching under concealed pipe drainage according to claim 1, characterized in that the drain pipe (3) is arranged at a gradient of 5 ‰, the drain pipe (3) is arranged at the middle of the inner side of the plexiglas tank (1), and one end of the outlet of the drain pipe (3) is perpendicular to the filtrate collector (11).

3. The device for simulating salt leaching of farmland under concealed pipe drainage according to claim 2, characterized in that the drain pipe (3) is provided with a plurality of holes uniformly, the drain pipe (3) is wrapped with a filter layer and a water-permeable non-woven geotextile, and the water-permeable non-woven geotextile is arranged between the drain pipe (3) and the filter layer.

4. A farmland salt leaching simulation device under concealed pipe drainage according to claim 1, characterized in that the bottom outlet of the Ma-Er bottle a (5-1) is communicated with a main pipe (7), one end of the main pipe (7) is arranged on the organic glass soil box (1), a plurality of branch pipes (8) communicated with the main pipe (7) are sequentially arranged along the radial direction of the main pipe (7), all the branch pipes (8) are sequentially arranged in each subarea (13), and one end of each branch pipe (8) communicated with the main pipe (7) is provided with a control valve (9).

5. The underground pipe drainage farmland salt leaching simulation device according to claim 1, wherein a control valve (9) is arranged at the position of the outflow opening (10), a filtrate collector (11) is arranged at the lower end of the outflow opening (10), and the filtrate collector (11) is also arranged at the bottom of the drainage pipe (3).

6. A simulator for salt leaching in farmland under sewer drain according to claim 1, characterized in that the salt sensors (4) are vertically and equally spaced in the soil in the subarea (13).

7. The device for simulating salt leaching of farmland under the concealed pipe drainage of any one of claims 1 to 6, wherein two sides of the bottom of the organic glass soil box (1) are fixedly connected with fixed bases (12).

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