Plant drainage and irrigation lysimeter

Abstract

The plant drainage and irrigation lysimeter comprises a base table and a lysimeter measuring cylinder, and the four corners of the lysimeter measuring cylinder are installed at the top of the base table through weighing mechanisms; the weighing mechanism comprises an installation shell fixedly connected to the top of the base table, a connecting sliding block is slidably connected to the inner wall of the installation shell, and an extrusion assembly is installed at the bottom of the connecting sliding block. Soil to be tested is put into the lysimeter measuring cylinder, the lysimeter measuring cylinder and the soil in the lysimeter measuring cylinder can drive the connecting sliding block to move downwards through the positioning sliding sleeve, and the pressure sensor is extruded through the extrusion block at the bottom of the extrusion assembly; according to the lysimeter disclosed by the utility model, when the lysimeter measures the change of soil moisture in the cylinder body, the change of the moisture in the soil can be conveniently measured through real-time monitoring of the pressure sensor, so that the practicability of the lysimeter disclosed by the utility model is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lysimeters, and particularly relates to a plant irrigation and drainage lysimeter. Background Art

[0002] A plant irrigation and drainage lysimeter is an experimental device used to measure plant water use and soil water balance. It usually consists of a container filled with soil, in which plants are planted. The design of the lysimeter enables it to accurately measure the water changes in the soil, including the water absorbed by plants, the water evaporated from the soil, and the water discharged through the drainage system.

[0003] Chinese Patent No. CN210347377U discloses a lysimeter, which includes a sampling cylinder and a cylinder bottom sleeve. The sampling cylinder penetrates up and down. The top of the cylinder bottom sleeve is open and the bottom is sealed. The inner wall of the cylinder bottom sleeve is adapted to the outer wall of the bottom end of the sampling cylinder. The bottom end of the sampling cylinder passes through the top end of the cylinder bottom sleeve and is embedded in the cylinder bottom sleeve. The sampling cylinder and the cylinder bottom sleeve are detachably connected.

[0004] The lysimeter in the above technology is not convenient for real-time monitoring of water changes in the soil, reducing its practicability. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a plant irrigation and drainage lysimeter to solve the technical defects that the existing lysimeter is not convenient for real-time monitoring of water changes in the soil and has low practicability.

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

[0007] A plant irrigation and drainage lysimeter includes a base and a lysimeter measuring cylinder body. The four corners of the lysimeter measuring cylinder body are installed on the top of the base through weighing mechanisms.

[0008] Among them, the weighing mechanism includes a mounting shell fixedly connected to the top of the base. A connecting slider is slidably connected to the inner wall of the mounting shell. An extrusion assembly is installed at the bottom of the connecting slider. A pressure sensor is installed at the bottom of the inner wall of the mounting shell corresponding to the extrusion assembly. A limiting assembly is installed on the side of the mounting shell.

[0009] As a further scheme of the utility model, a plurality of equally spaced penetration holes are opened at the bottom of the lysimeter measuring cylinder body.

[0010] As a further scheme of the utility model, the extrusion assembly includes a mounting cylinder fixedly connected to the bottom of the connecting slider. A connecting spring is fixedly connected to the top of the inner wall of the mounting cylinder. A connecting sliding rod is fixedly connected to the bottom of the connecting spring. An extrusion block is fixedly connected to the bottom of the connecting sliding rod corresponding to the position of the pressure sensor.

[0011] As a further solution of the present utility model, one side of the extrusion block close to the pressure sensor is in contact with the pressure sensor.

[0012] As a further preferred solution of the present utility model, the limiting component includes a mounting block fixedly connected to the top of the side of the mounting shell. A positioning slide bar is fixedly connected to the bottom of the mounting block, and a positioning slide sleeve is slidably connected to the positioning slide bar.

[0013] As a further preferred solution of the present utility model, the bottom of the positioning slide bar is fixedly connected to the top of the base table, and one side of the positioning slide sleeve close to the lysimeter measuring cylinder is fixedly connected to the side of the lysimeter measuring cylinder.

[0014] Compared with the prior art, the plant drainage and irrigation lysimeter provided by the present utility model has the following beneficial effects:

[0015] Put the soil to be tested inside the lysimeter measuring cylinder. The lysimeter measuring cylinder and the soil inside the lysimeter measuring cylinder will drive the connecting slider to move downward through the positioning slide sleeve, and the extrusion block at the bottom of the extrusion component will squeeze the pressure sensor. Therefore, when the soil moisture inside the lysimeter measuring cylinder changes, it can be monitored in real time through the pressure sensor, which greatly facilitates the measurement of the moisture change in the soil by the test personnel, thereby improving the practicability of the lysimeter of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only the case of the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2 It is a schematic cross-sectional structural diagram of an embodiment of the present utility model;

[0019] Figure 3 It is a schematic structural diagram of the weighing mechanism in an embodiment of the present utility model;

[0020] Figure 4 It is a schematic structural diagram of the extrusion component in an embodiment of the present utility model.

[0021] Reference numerals:

[0022] 1. Base table; 2. Lysimeter measuring cylinder; 3. Weighing mechanism;

[0023] 301. Installation shell; 302. Connection slider; 303. Extrusion assembly; 304. Pressure sensor; 305. Limiting assembly;

[0024] 3031. Installation cylinder; 3032. Connection spring; 3033. Connection slide bar; 3034. Extrusion block;

[0025] 3051. Installation block; 3052. Positioning slide bar; 3053. Positioning slide sleeve. Detailed implementation manner

[0026] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer and more understandable, the following further details the embodiments of the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present utility model.

[0028] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the communication inside two elements; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0029] See the attached Figures 1-4 As shown, the plant drainage and irrigation lysimeter of the embodiment of the present utility model includes a base 1 and a lysimeter measuring cylinder 2. The four corners of the lysimeter measuring cylinder 2 are all installed on the top of the base 1 through a weighing mechanism 3.

[0030] Among them, the weighing mechanism 3 includes an installation shell 301 fixedly connected to the top of the base 1. A connection slider 302 is slidably connected to the inner wall of the installation shell 301. An extrusion assembly 303 is installed at the bottom of the connection slider 302. A pressure sensor 304 is installed at the bottom of the inner wall of the installation shell 301 and corresponding to the position of the extrusion assembly 303. A limiting assembly 305 is installed on the side of the installation shell 301.

[0031] The pressure sensor 304 converts analog voltage or current into digital values through an externally connected analog-to-digital converter, and the digital signal is sent to a microprocessor or microcontroller for processing. The processed digital signal is sent to the display screen through a parallel interface, facilitating the observation by the test personnel.

[0032] See the appendix Figures 1-4 As shown, a plurality of permeation holes arranged at equal distances are provided at the bottom of the lysimeter measurement cylinder 2.

[0033] See the appendix Figure 4 As shown, the extrusion assembly 303 includes an installation cylinder 3031 fixedly connected to the bottom of the connection slider 302. A connection spring 3032 is fixedly connected to the top of the inner wall of the installation cylinder 3031. The bottom of the connection spring 3032 is fixedly connected to a connection slide rod 3033. A pressing block 3034 is fixedly connected to the bottom of the connection slide rod 3033 and at a position corresponding to the pressure sensor 304.

[0034] One side of the pressing block 3034 close to the pressure sensor 304 is in contact with the pressure sensor 304.

[0035] See the appendix Figure 3 As shown, the limiting assembly 305 includes an installation block 3051 fixedly connected to the top of the side of the installation shell 301. A positioning slide rod 3052 is fixedly connected to the bottom of the installation block 3051. A positioning slide sleeve 3053 is slidably connected to the positioning slide rod 3052.

[0036] The bottom of the positioning slide rod 3052 is fixedly connected to the top of the base 1. One side of the positioning slide sleeve 3053 close to the lysimeter measurement cylinder 2 is fixedly connected to the side of the lysimeter measurement cylinder 2.

[0037] When using the embodiment of the present utility model, the soil to be tested is placed inside the lysimeter measurement cylinder 2. The lysimeter measurement cylinder 2 and the soil inside the lysimeter measurement cylinder 2 will drive the connection slider 302 to move downward through the positioning slide sleeve 3053, and the pressing block 3034 at the bottom of the extrusion assembly 303 will press the pressure sensor 304. Therefore, when the soil moisture inside the lysimeter measurement cylinder 2 changes, it can be monitored in real time through the pressure sensor 304, which greatly facilitates the test personnel to measure the moisture change in the soil, thereby improving the practicability of the lysimeter of the present utility model.

[0038] The above shows and describes the basic principles of the present invention. The above is only the preferred embodiment of the present invention and is not used to limit the present invention. The descriptions in the above embodiments and the specification only illustrate the principles of the present invention. Without departing from the scope of the present invention, any modifications, equivalent replacements, and improvements made within the spirit and scope of the present invention shall be included in the protection scope of the present invention.

Claims

1. Plant irrigation and drainage lysimeter, characterized by: It comprises a base (1) and a lysimeter measuring cylinder (2), wherein the four corners of the lysimeter measuring cylinder (2) are mounted on the top of the base (1) via a weighing mechanism (3); The weighing mechanism (3) comprises a mounting shell (301) fixedly connected to the top of the base (1); a connecting slider (302) is slidably connected to the inner wall of the mounting shell (301); an extrusion assembly (303) is installed at the bottom of the connecting slider (302); a pressure sensor (304) is installed at the bottom of the inner wall of the mounting shell (301) and at a position corresponding to the extrusion assembly (303); and a limit assembly (305) is installed on the side of the mounting shell (301).

2. The plant irrigation and drainage lysimeter according to claim 1, characterized in that: The bottom of the lysimeter measuring cylinder (2) is provided with a plurality of permeation holes arranged at equal distances.

3. The plant irrigation and drainage lysimeter according to claim 2, characterized in that: The extrusion assembly (303) comprises a mounting tube (3031) fixedly connected to the bottom of the connecting slider (302); a connecting spring (3032) is fixedly connected to the top of the inner wall of the mounting tube (3031); a connecting slide rod (3033) is fixedly connected to the bottom of the connecting spring (3032); and an extrusion block (3034) is fixedly connected to the bottom of the connecting slide rod (3033) and at a position corresponding to the pressure sensor (304).

4. The plant irrigation and drainage lysimeter according to claim 3, characterized in that: A side of the extrusion block (3034) close to the pressure sensor (304) is in contact with the pressure sensor (304).

5. The plant irrigation and drainage lysimeter according to claim 4, characterized in that: The limiting assembly (305) comprises a mounting block (3051) fixedly connected to the top of the side of the mounting shell (301), a positioning slide rod (3052) fixedly connected to the bottom of the mounting block (3051), and a positioning sleeve (3053) slidably connected to the positioning slide rod (3052).

6. The plant irrigation and drainage lysimeter according to claim 5, characterized in that: The bottom of the positioning slide rod (3052) is fixedly connected to the top of the base (1), and the side of the positioning slide sleeve (3053) close to the lysimeter measuring cylinder (2) is fixedly connected to the side of the lysimeter measuring cylinder (2).

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