Improved leaching irrigation system for saline-alkali soil

Abstract

The utility model discloses an improved saline and alkaline land leaching irrigation system, including field, buried pipe, drainage canal and water inlet channel, the inside of field is paved with buried pipe, the one side of field is drainage canal and is the water inlet channel of other side, and the both ends of buried pipe extend to drainage canal and water inlet channel respectively, and the periphery of field is provided with field ridge, and the ditch both sides of drainage canal and water inlet channel are water lifting, and water lifting is flush with field ridge and is higher than the height of field. The improved saline and alkaline land leaching irrigation system, through the setting of gate valve and the reform of ditch, makes the water storage in the water inlet channel can be distributed from the buried pipe to the underground, and penetrates into the soil under the action of water pressure, and the saline in the soil is dissolved from below to above and is carried out, thereby reaches the effect of cleaning, and the cleaning mode can effectively reduce the probability of buried pipe hole blockage, and maintains the cleaning efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of saline-alkali land improvement systems, specifically an improved saline-alkali land leaching irrigation system. Background Technology

[0002] Saline-alkali land reclamation requires comprehensive measures of "salt reduction, acid adjustment, and structural improvement," combined with water conservancy, agriculture, and biological methods to gradually improve soil conditions to meet usage needs. Leaching irrigation is a key means of reducing soil salinity by dissolving soil salts with sufficient irrigation water and then draining the salt water through a drainage system. The core lies in the synergy of "sufficient irrigation + effective salt drainage." The soil must have a certain degree of permeability and must be equipped with a drainage system (subsurface pipes, open ditches, etc.) to prevent salts from flowing back and accumulating after infiltration with water.

[0003] The leaching irrigation improvement of saline-alkali land requires burying underground pipes in the soil. Water on the surface dissolves salt and alkali through irrigation or natural rainfall and seeps into the ground. The water carrying salt and alkali enters the underground pipes through the holes and flows out through open ditches. Although this method is low-cost and requires minimal modification, most of the salt and alkali will still be stored underground during the infiltration process. In the underground pipes of saline-alkali land leaching irrigation, the soil silt, calcium carbonate and calcium sulfate deposits formed during the leaching process, and soil microorganisms multiply in a suitable environment. Their metabolic products combine with soil particles to form biofilms or flocculents, which block the pores of the underground pipes, preventing the salt and alkali from being discharged.

[0004] Based on the problems raised above, technical improvements and optimizations are made to the existing saline-alkali land improvement leaching irrigation system to improve the leaching efficiency of saline-alkali land. Utility Model Content

[0005] The purpose of this invention is to provide an improved saline-alkali land leaching irrigation system to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An improved saline-alkali land leaching irrigation system includes a field, a culvert, a drainage ditch, and an inlet ditch. The culvert is laid inside the field. One side of the field is a drainage ditch and the other side is an inlet ditch. The two ends of the culvert extend to the drainage ditch and the inlet ditch, respectively. The field is surrounded by field ridges. Water embankments are set on both sides of the drainage ditch and the inlet ditch. The water embankments are level with the field ridges and higher than the height of the field.

[0007] As a further embodiment of this utility model: the field consists of a water level layer, a planting layer and a sand and gravel layer. The planting layer is located on the surface of the field, and the planting layer is above the water level layer. A hidden pipe is buried between the planting layer and the water level layer, and the outside of the hidden pipe is filled with a sand and gravel layer.

[0008] As a further improvement of this utility model: both ends of the concealed pipe are open, a gate valve F is provided at the end of the concealed pipe that connects to the drainage ditch, and an opening for water inlet is provided at the end of the concealed pipe that connects to the water inlet ditch, and a filter screen is installed at the opening to intercept impurities.

[0009] As a further embodiment of this utility model: the water pump is equipped with a drainage pipe for draining water above the planting layer in the field into a drainage ditch, and a gate valve F is installed on the drainage pipe.

[0010] As a further embodiment of this utility model: an inlet ditch and a drainage ditch are provided at both ends of the drainage ditch and the inlet ditch, a dam is provided between the drainage ditch and the inlet ditch to intercept the water flow, the drainage ditch and the drainage ditch are connected, and a gate valve F is provided at the connection between the drainage ditch and the drainage ditch.

[0011] As a further embodiment of this utility model: the water inlet channel is interconnected with the water inlet ditch and the drainage ditch, and a gate valve F and a gate valve F are installed at the connection between the water inlet channel and the water inlet ditch and the drainage ditch.

[0012] As a further improvement of this utility model: the terrain of the inlet ditch is higher than that of the inlet channel, the terrain of the inlet channel is higher than that of the field, the terrain of the field is higher than that of the drainage ditch, and the terrain of the drainage ditch is higher than that of the drainage ditch.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This improved saline-alkali land leaching irrigation system, through the installation of gate valves and the modification of ditches, allows the water stored inside the inlet canal to be distributed underground through underground pipes. Under the action of water pressure, the water seeps into the soil, dissolving and carrying away the salt and alkali in the soil from bottom to top, thereby achieving the cleaning effect. This cleaning method can effectively reduce the probability of blockage in the underground pipe holes and maintain cleaning efficiency. Attached Figure Description

[0014] Figure 1 A schematic diagram of an improved saline-alkali land leaching irrigation system; Figure 2 This is a top view of the structure of an improved saline-alkali land leaching irrigation system.

[0015] In the diagram: 1. Field; 101. Water level; 102. Planting layer; 103. Gravel layer; 2. Underground pipe; 3. Drainage ditch; 4. Inlet ditch; 5. Gate valve F1; 6. Drainage pipe; 7. Gate valve F2; 8. Water lift; 9. Field ridge; 10. Inlet ditch; 11. Gate valve F3; 12. Gate valve F5; 13. Gate valve F4; 14. Drainage ditch. Detailed Implementation

[0016] Please see Figure 1 and 2In this embodiment of the invention, an improved saline-alkali land leaching irrigation system includes a field 1, a culvert 2, a drainage ditch 3, and an inlet ditch 4. The culvert 2 is laid inside the field 1. One side of the field 1 is the drainage ditch 3, and the other side is the inlet ditch 4. The two ends of the culvert 2 extend to the drainage ditch 3 and the inlet ditch 4, respectively. A field ridge 9 is set around the field 1. Water lifts 8 are set on both sides of the drainage ditch 3 and the inlet ditch 4. The water lifts 8 are level with the field ridges 9 and higher than the height of the field 1. This application utilizes the water storage method of the inlet ditch 4 to distribute the irrigation water inside the inlet ditch 4 to the lower layer of the field 1 through the culvert 2. Under the action of water pressure, the irrigation water flows from the culvert 2 to the lower layer of the field 1. The water infiltrates into the outer field 1, causing the water at the bottom of field 1 to flow upwards, carrying the salt and alkali out of the soil and reaching the surface of field 1. With the help of the field ridge 9, the water on the surface of field 1 can be stored for about five to ten centimeters. Then, the water in field 1 is drained and sent into the drainage ditch 3 for treatment, such as through a screen → sedimentation → filtration process, to reduce the salinity and reuse it after it meets the irrigation standards. It is then pumped to the inlet ditch 4 for reuse. This method can effectively reduce the probability of blockage in the pores of the underground pipe 2, maintain the efficiency of leaching, and the water infiltration efficiency is higher than that of ordinary leaching irrigation. The recycling of saline water is also simpler.

[0017] In a preferred embodiment, field 1 consists of a water level layer 101, a planting layer 102, and a gravel layer 103. The planting layer 102 is located on the surface of field 1, and the planting layer 102 is on top of the water level layer 101. A buried pipe 2 is installed between the planting layer 102 and the water level layer 101. The outside of the buried pipe 2 is filled with the gravel layer 103. A buried trench with a width of 50-80cm and a depth set according to the actual groundwater level is dug in the planting layer 102 using mechanical equipment. A 5-10cm layer of gravel is laid at the bottom of the buried trench, and then the buried pipe 2 is buried. Another 5-10cm layer of gravel is laid on the buried pipe 2, so that the gravel creates pores between the buried pipe 2 and the gravel, which have good permeability and can intercept and filter holes in the soil that are easy to clog the buried pipe 2, thus maintaining good permeability, whether the soil permeates into the buried pipe 2 or the buried pipe 2 permeates into the soil.

[0018] In a preferred embodiment, both ends of the underground pipe 2 are open. A gate valve F15 is installed at the end of the underground pipe 2 that connects to the drainage ditch 3, and an opening for water intake is provided at the end of the underground pipe 2 that connects to the water inlet ditch 4. A filter screen is installed at the opening to intercept impurities. The water inlet ditch 4 is an open ditch that contains a large amount of impurities. It is necessary to filter in advance to intercept the impurities outside the underground pipe 2. After the gate valve F15 is closed, the drainage end of the underground pipe is sealed. Under the action of water pressure, the irrigation water in the underground pipe 2 is evenly squeezed and penetrated into the field 1 to achieve the effect of uniform rinsing irrigation.

[0019] In a preferred embodiment, the water pump 8 is equipped with a drainage pipe 6 for draining water above the planting layer 102 in the field 1 into the drainage ditch 3. A gate valve F27 is installed on the drainage pipe 6, and the drainage pipe 6 is used to drain saline water from inside the field 1.

[0020] In a preferred embodiment, an inlet ditch 10 and a drainage ditch 14 are provided at both ends of the drainage ditch 3 and the inlet ditch 4. A dam is provided between the drainage ditch 3 and the inlet ditch 10 to intercept the water flow. The drainage ditch 3 and the drainage ditch 14 are connected. A gate valve F311 is provided at the connection between the drainage ditch 3 and the drainage ditch 14. When multiple plots 1 are combined, the inlet ditch 4 is located between the plots 1, maintaining a system module where one side of the plot 1 is the drainage ditch 3 and the other side is the inlet ditch 4. The inlet ditch 10 pumps irrigation water into the inlet ditch 10 with a higher water level. The irrigation water in the inlet ditch 10 flows into the inlet ditch 4 and through each underground pipe 2. Under the action of water pressure, the irrigation water dissolves salt and alkali through infiltration and carries it out of the soil to the surface of the plot 1. The water flows out of the plot 1 through the drainage pipe 6. The salt and alkali water inside the drainage pipe 6 is collected and treated through the drainage ditch 14.

[0021] In a preferred embodiment, the inlet channel 4 is interconnected with the inlet ditch 10 and the drainage ditch 14. Gate valves F413 and F512 are installed at the connection points between the inlet channel 4 and the inlet ditch 10 and the drainage ditch 14. The underground pipe 2 has many functions. It can not only allow water to seep outward to clean the saline-alkali land, but also, during periods of heavy rainfall, close gate valves F27 and F512 and open gate valve F413. Rainwater collects in the field 1 and seeps downward into the underground pipe 2, which then flows into the drainage ditch 3 and the inlet channel 4, thus cleaning the saline-alkali land. After cleaning, during the planting stage, the underground pipe 2 can also be used for irrigation. By controlling the water level inside the inlet channel 4, the moisture content and water level of the planting layer 102 can be observed. Irrigation water does not enter the soil but is discharged directly through gate valve F15 to clean and flush the underground pipe 2.

[0022] In a preferred embodiment, the terrain of the inlet ditch 10 is higher than that of the inlet channel 4, the terrain of the inlet channel 4 is higher than that of the field 1, the terrain of the field 1 is higher than that of the drainage ditch 3, and the terrain of the drainage ditch 3 is higher than that of the drainage ditch 14. The irrigation water is no longer connected to a water pump and flows directly through the terrain.

[0023] It should be noted that all the above embodiments belong to the same utility model concept, and the descriptions of each embodiment have different focuses. Where the description in a particular embodiment is not detailed, please refer to the description in other embodiments.

[0024] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An improved saline-alkali land leaching irrigation system, comprising a field (1), a submerged pipe (2), a drainage ditch (3), and an inlet ditch (4), wherein the submerged pipe (2) is laid inside the field (1), characterized in that, The field (1) has a drainage ditch (3) on one side and an inlet ditch (4) on the other side. The two ends of the underground pipe (2) extend to the drainage ditch (3) and the inlet ditch (4) respectively. The field (1) is surrounded by field ridges (9). The drainage ditch (3) and the inlet ditch (4) are connected by water embankments (8) on both sides. The water embankments (8) are level with the field ridges (9) and higher than the height of the field (1).

2. The improved saline-alkali land leaching irrigation system according to claim 1, characterized in that, The field (1) consists of a water level layer (101), a planting layer (102) and a gravel layer (103). The planting layer (102) is located on the surface of the field (1), and the planting layer (102) is above the water level layer (101). A hidden pipe (2) is buried between the planting layer (102) and the water level layer (101), and the outside of the hidden pipe (2) is filled with the gravel layer (103).

3. The improved saline-alkali land leaching irrigation system according to claim 1, characterized in that, Both ends of the concealed pipe (2) are open. A gate valve F1 (5) is installed at one end of the concealed pipe (2) that is connected to the drainage ditch (3). An opening for water intake is provided at one end of the concealed pipe (2) that is connected to the water inlet ditch (4), and a filter screen is installed at the opening to intercept impurities.

4. The improved saline-alkali land leaching irrigation system according to claim 3, characterized in that, The water pump (8) is equipped with a drainage pipe (6) for draining water above the planting layer (102) in the field (1) to the drainage ditch (3), and a gate valve F2 (7) is installed on the drainage pipe (6).

5. The improved saline-alkali land leaching irrigation system according to any one of claims 1-4, characterized in that, The drainage ditch (3) and the inlet ditch (4) are provided with an inlet ditch (10) and a drainage ditch (14) at both ends. A dam is provided between the drainage ditch (3) and the inlet ditch (10) to intercept the water flow. The drainage ditch (3) and the drainage ditch (14) are connected. A gate valve F3 (11) is provided at the connection between the drainage ditch (3) and the drainage ditch (14).

6. The improved saline-alkali land leaching irrigation system according to claim 5, characterized in that, The water inlet channel (4) is interconnected with the water inlet ditch (10) and the drainage ditch (14), and gate valves F4 (13) and F5 (12) are installed at the connection between the water inlet channel (4) and the water inlet ditch (10) and the drainage ditch (14).

7. The improved saline-alkali land leaching irrigation system according to claim 6, characterized in that, The terrain of the inlet ditch (10) is higher than that of the inlet canal (4), the terrain of the inlet canal (4) is higher than that of the field (1), the terrain of the field (1) is higher than that of the drainage ditch (3), and the terrain of the drainage ditch (3) is higher than that of the drainage ditch (14).

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