Efficient and accurate soil pore measuring device

Abstract

The utility model discloses an efficient and accurate soil pore measuring device. The device comprises a placing box for placing a cutting ring; the containing box is cylindrical, a top cover used for preventing evaporation is connected to the top of the containing box in a clamped mode, a groove used for draining water and a drainage groove used for draining water are formed in the inner bottom of the containing box, a drainage pipe corresponding to the drainage groove is arranged at the lower end of the outer wall of the containing box, and a second valve is installed on the drainage pipe; the Markov bottle is used for supplying water to the placing box; a water supply pipe is connected to a water outlet in the lower end of the Markov bottle, a first valve is mounted on the water supply pipe, and an insertion hole is formed in one side of the top cover; the weighing balance is used for weighing the placing box; the weighing balance is provided with a tray, and the placing box is located on the tray. According to the device, efficient and accurate soil pore and moisture performance measurement can be achieved, meanwhile, data can be automatically recorded, whole-course supervision is not needed, and a large amount of manpower and time cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of soil pore measurement equipment, in particular to a highly efficient and accurate soil pore measurement device. Background Art

[0002] The determination of soil pore conditions and the calculation of its water properties are important contents in studying soil physical properties and water efficiency. The immersion test method is currently the most commonly used method with the best theoretical basis. However, the current indoor experimental determination method is the ring knife immersion method. After using the ring knife to collect soil, the supporting water supply, observation, and weighing are all dependent on manual operation when conducting indoor measurements. It is labor-intensive and time-consuming. In addition, due to untimely water level control, it is easy to cause the ring knife soil to be unsaturated in water absorption, and evaporation loss causes the later drainage results to be larger. The results have large errors, which is extremely unfavorable for in-depth scientific research. At present, there is no high-precision, labor-saving and automated measurement device.

[0003] Therefore, based on the principle of soil pore measurement, this application proposes a measurement device with high accuracy, labor saving and automatic recording. Utility Model Content

[0004] The purpose of the utility model is to provide an efficient and accurate soil porosity measuring device. The device has a simple structure and is easy to use. It can realize efficient and accurate soil porosity and moisture performance measurement. At the same time, it can automatically record data without the need for full-time supervision, saving a lot of manpower and time costs. It has high practical value and can solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An efficient and accurate soil pore measurement device, comprising:

[0007] A placement box for placing ring knives;

[0008] The placement box is cylindrical, a top cover for preventing evaporation is clamped on the top of the placement box, a groove for draining water and a drainage groove for draining water are arranged on the inner bottom of the placement box, a drainage pipe corresponding to the drainage groove is arranged at the lower end of the outer wall of the placement box, and a second valve is installed on the drainage pipe;

[0009] A Martens flask for supplying water to the placement box;

[0010] The water outlet at the lower end of the Malchnitz flask is connected to a water supply pipe, a first valve is installed on the water supply pipe, a plug hole is opened on one side of the top cover, and the lower end of the water supply pipe passes through the plug hole and extends to the inside of the placement box;

[0011] A weighing balance for weighing the placement box;

[0012] A tray is provided on the weighing balance, and the placement box is located on the tray.

[0013] Preferably, the diameter of the placement box is 10 - 10.4 cm, and the height of the placement box is 10 - 11 cm.

[0014] Preferably, the drainage groove is a semi-circular drainage groove with a diameter of 0.9 - 1.1 cm, and the drainage groove inclines 1 degree towards the drain pipe inlet for easy drainage.

[0015] Preferably, the drain pipe is a drain pipe with an inner diameter of 0.9 - 1.1 cm, and the inlet of the drain pipe communicates with the lower end of the drainage groove.

[0016] Preferably, multiple groups of grooves are equidistantly distributed on both sides of the drainage groove, and the grooves are inclined. The diameter of the grooves is 0.4 - 0.6 cm.

[0017] Preferably, the water supply pipe on the Mariotte bottle has a diameter of 0.5 - 0.8 cm, the top cover is an acrylic top cover with a diameter of 10.4 - 10.6 cm, and the diameter of the jack on the top cover is 1 - 1.2 cm to facilitate the insertion of the water supply pipe while maintaining ventilation.

[0018] Compared with the prior art, the beneficial effects of the present utility model are:

[0019] The present utility model is provided with a cylindrical placement box for placing the core cutter, a top cover with a jack is arranged on the top of the placement box, multiple groups of grooves and a set of drainage grooves are arranged at the inner bottom of the placement box, drain pipes corresponding to the drainage grooves and provided with second valves are arranged on the inner and outer walls of the placement box, a Mariotte bottle with a water supply pipe is also provided for supplying water into the placement box, and a weighing balance with a tray is provided for weighing and recording. The device has a simple structure and is convenient to use, can realize efficient and accurate determination of soil pore and moisture performance. At the same time, it can automatically record data, without the need for full-process supervision, saving a large amount of labor and time costs, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the top cover of the present utility model;

[0022] Figure 3 is a schematic structural diagram of the placement box of the present utility model;

[0023] Figure 4 is a schematic structural diagram of the drainage groove of the present utility model.

[0024] In the figure: 1, weighing balance; 2, tray; 3, Mariotte bottle; 4, water supply pipe; 5, first valve; 6, drain pipe; 7, second valve; 8, placement box; 9, top cover; 10, jack; 11, groove; 12, drainage groove. Detailed implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-4 , the present invention provides a technical solution:

[0027] An efficient and accurate soil pore determination device, comprising:

[0028] A placement box 8 for placing a core cutter; the placement box 8 is cylindrical, the top of the placement box 8 is clamped with a top cover 9 for preventing evaporation, the inner bottom of the placement box 8 is provided with a groove 11 for draining water and a drainage groove 12 for drainage, and the lower end of the outer wall of the placement box 8 is provided with a drain pipe 6 corresponding to the drainage groove 12, and a second valve 7 is installed on the drain pipe 6;

[0029] The diameter of the placement box 8 is 10 - 10.4 cm, and the height of the placement box 8 is 10 - 11 cm. The drainage groove 12 is a semi-circular drainage groove 12 with a diameter of 0.9 - 1.1 cm, and the drainage groove 12 is inclined 1 degree towards the inlet of the drain pipe 6 for easy drainage. The drain pipe 6 is a drain pipe 6 with an inner diameter of 0.9 - 1.1 cm, and the inlet of the drain pipe 6 communicates with the lower end of the drainage groove 12. Multiple groups of grooves 11 are equidistantly distributed on both sides of the drainage groove 12, and the grooves 11 are inclined, and the diameter of the grooves 11 is 0.4 - 0.6 cm.

[0030] The design that the drainage groove 12 is inclined 1 degree towards the inlet of the drain pipe 6 can facilitate drainage in the later stage;

[0031] A Mariotte bottle 3 for supplying water to the inside of the placement box 8; the lower water outlet of the Mariotte bottle 3 is connected with a water supply pipe 4, a first valve 5 is installed on the water supply pipe 4, a jack 10 is opened on one side of the top cover 9, and the lower end of the water supply pipe 4 passes through the jack 10 and extends into the inside of the placement box 8; the diameter of the water supply pipe 4 on the Mariotte bottle 3 is 0.5 - 0.8 cm, the top cover 9 is an acrylic top cover 9 with a diameter of 10.4 - 10.6 cm, and the diameter of the jack 10 on the top cover 9 is 1 - 1.2 cm to facilitate the insertion of the water supply pipe 4 while maintaining ventilation.

[0032] The use of a Mariotte bottle 3 can achieve the functions of water supply at a fixed water level (water head) and timed cut-off of water supply;

[0033] A weighing balance 1 for weighing the placement box 8; a tray 2 is provided on the weighing balance 1, and the placement box 8 is located on the tray 2.

[0034] The weighing balance 1 is set as an electronic balance with a self-recording percentile, which can achieve timed self-recording of weighing records.

[0035] Both the first valve 5 and the second valve 7 are valves with automatic control switches;

[0036] By setting a cylindrical placement box 8 for placing the core cutter, a top cover 9 with a jack 10 is provided at the top of the placement box 8, multiple groups of grooves 11 and a set of drainage grooves 12 are provided at the inner bottom of the placement box 8, and drain pipes 6 with second valves 7 corresponding to the drainage grooves 12 are provided on the inner and outer walls of the placement box 8. A Mariotte bottle 3 with a water supply pipe 4 is also provided for supplying water into the placement box 8, and a weighing balance 1 with a tray 2 is provided for weighing and recording. An efficient and accurate soil porosity measuring device that does not require full-time supervision, automatic water supply, and semi-automatic weighing is provided, and the soil water holding performance can be calculated using the measurement results, which can effectively solve the problems of low accuracy, time-consuming, and laborious in the existing methods;

[0037] During actual use, the following measurement steps are taken:

[0038] S1. Before collecting the soil, record the mass M0 of the core cutter (with cover and filter paper pad), record the mass M1 of the supporting non-perforated top cover 9, measure the mass M2 of the filter paper, and the mass M3 of the filter paper after being saturated with water;

[0039] S2. Collect the core cutter soil and weigh it on-site (with upper and lower covers and filter paper pad), denoted as M4;

[0040] S3. Bring it back to the indoor, remove the top cover 9 from the core cutter, only keep the bottom cover with mesh and filter paper pad, place the bottom cover downward in the core cutter placement box 8, cover the evaporation-proof top cover 9, and weigh it, automatically record as M5;

[0041] S4. Connect the Mariotte bottle 3, open the water inlet switch of the Mariotte bottle 3, close the external drainage switch, 100cm 3 The core cutter controls the water head height in the core cutter placement device at the 5.05 cm position, 200cm 3 The core cutter controls the water head height at the 7.00 cm position, and the time mark is 0h at this time;

[0042] S5. After setting 12.0 h (different durations can be set according to the soil texture), set to close the water inlet switch pipe of the Mariotte bottle 3, set to open the switch of the drain pipe 6 to drain the gravitational pore water, according to the previous experiment, set the delay (100cm 3The core cutter for 135 seconds, 12.039 h; 200 cm 3 After the core cutter for 175 seconds, 12.045 h), the weighing platform records the weight M6;

[0043] After S6.M6, place it again for about 2 h (100 cm 3 The core cutter for 14 h; 200 cm 3 The core cutter for 14 h), set to automatically record the weighing M7;

[0044] After S7.M7, place it again (sandy soil for 38 h, loam for 62 h, clay for 96 h), (set 100 cm 3 The core cutter for 110 h; 200 cm 3 The core cutter for 14.045 h), set to automatically weigh M8;

[0045] Take out a part of the soil after S8.M8 and use the drying method to measure the soil water content θ;

[0046] S9. Using the above various values, referring to the corresponding specifications or theories, the total soil porosity, capillary porosity, non-capillary porosity, saturated water holding capacity, capillary water holding capacity, and field water holding capacity can be calculated.

[0047] Generally speaking, the structure of this device is simple and easy to use. It can achieve efficient and accurate measurement of soil porosity and water performance. At the same time, it can automatically record data, without the need for full supervision, saving a large amount of labor and time costs, and has high practical value.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An efficient and accurate soil pore measurement device, characterized in that: include: A placement box (8) for placing the ring knife; The placement box (8) is arranged in a cylindrical shape, a top cover (9) for preventing evaporation is clamped on the top of the placement box (8), a groove (11) for draining water and a drainage groove (12) for draining water are arranged on the inner bottom of the placement box (8), a drainage pipe (6) corresponding to the drainage groove (12) is arranged at the lower end of the outer wall of the placement box (8), and a second valve (7) is installed on the drainage pipe (6); A Martens flask (3) for supplying water to the storage box (8); The water outlet at the lower end of the Martens flask (3) is connected to a water supply pipe (4), a first valve (5) is installed on the water supply pipe (4), a plug hole (10) is opened on one side of the top cover (9), and the lower end of the water supply pipe (4) passes through the plug hole (10) and extends to the inside of the placement box (8).

2. The efficient and accurate soil pore measurement device according to claim 1, characterized in that: The diameter of the placement box (8) is 10-10.4 cm, and the height of the placement box (8) is 10-11 cm.

3. The efficient and accurate soil pore measurement device according to claim 1, characterized in that: The drainage groove (12) is a semicircular drainage groove (12) with a diameter of 0.9-1.1 cm. The drainage groove (12) is inclined at 1 degree toward the inlet of the drainage pipe (6) to facilitate drainage.

4. The efficient and accurate soil pore measurement device according to claim 1, characterized in that: The drainage pipe (6) is a drainage pipe (6) with an inner diameter of 0.9-1.1 cm, and the inlet of the drainage pipe (6) is connected to the lower end of the drainage groove (12).

5. The efficient and accurate soil pore measurement device according to claim 1, characterized in that: The grooves (11) are arranged in multiple groups at equal intervals on both sides of the drainage groove (12), and the grooves (11) are arranged in an inclined manner. The diameter of the grooves (11) is 0.4-0.6 cm.

6. The efficient and accurate soil pore measurement device according to claim 1, characterized in that: The water supply pipe (4) on the Maltz flask (3) has a diameter of 0.5-0.8 cm.

7. The efficient and accurate soil pore measurement device according to claim 1, characterized in that: The top cover (9) is an acrylic plate with a diameter of 10.4-10.6 cm, and the diameter of the insertion hole (10) on the top cover (9) is 1-1.2 cm to facilitate the insertion of the water supply pipe (4) while maintaining ventilation.

8. The efficient and accurate soil pore measurement device according to claim 1, characterized in that: Also includes: A weighing balance (1) for weighing the placement box (8); The weighing balance (1) is provided with a tray (2), and the placement box (8) is located on the tray (2).

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