Method for discharging salt and alkali through concealed pipe

Abstract

The invention relates to the technical field of saline-alkali land treatment, in particular to a method for discharging salt and alkali through concealed pipes. A main pipeline is buried at the boundary of the field, one end of the main pipeline is communicated with the water collecting tank, and a first branch pipeline is vertically arranged at the other end; observation pits are formed in the middle line of the field in the same direction and the vertical direction of the main pipeline; arranging residual branch pipelines and switch control pipelines according to the observation pits; a fishpond is arranged to be communicated with the water collecting pond. By means of the designed method for removing salt and alkali through the concealed pipes, farmland transformation and improvement can be achieved, the per unit area potential can be effectively excavated, forage grass and modern animal husbandry are developed through saline-alkali soil according to local conditions, multiple food channels can be expanded, ecologically fragile saline-alkali areas can be treated, the wind prevention and sand fixation capacity can be improved, and saline-alkali soil desertification can be prevented; the agricultural production condition and the ecological environment are improved. The fishpond is additionally arranged to enrich product diversity and increase yield.

Description

Technical Field

[0001] The invention relates to the technical field of saline-alkali land treatment, and more specifically to a method for draining salt and alkali through concealed pipes. Background Art

[0002] The reason for the formation of saline-alkali land is that the groundwater level is above the ground surface (1.5 meters) and when the rainfall is less than the evaporation, the groundwater will rise due to the temperature and sunlight. Over time, capillary channels for groundwater to rise will be formed. The groundwater rises along the capillary channels and is evaporated into gas and rises into the air. Harmful substances such as salt-alkali green contained in the water will not be evaporated and remain on the surface. When the pH value accumulates, saline-alkali land is formed. When the pH value exceeds 8.5, the yield will be reduced. The more it exceeds, the less the yield. In severe cases, except for a few special grasses that are not afraid of salt and alkali, other grasses basically will not survive, and crops will find it even more difficult to survive. There is another type of saline-alkali land that is 2 to 3 meters deep and has no groundwater. It was formed decades to hundreds of years ago, and the local rainfall + water consumption for irrigation is less than the evaporation. This type of land is usually very fine clay. The salt and alkali will play hide-and-seek with you like a naughty child. When it rains and irrigates, it moves downward with the water for a small distance. Due to the limited depth of clay infiltration, it sinks to a certain position and quickly returns to the surface when the sun is good and the temperature is high, becoming an indestructible cockroach. The cost of governance is high and it takes a long time. It is best to use buried drainage pipes and deep plowing and deep loosening + large-scale irrigation. Let the saline-alkali water seep into the pipe and drain away. The conditions for the formation of saline-alkali water have been lost. This type of saline-alkali land is not easy to generate saline-alkali again after removal. The conditions for water and fertilizer conservation are good and the potential for increased production is great. There may be many types of surface salt-alkali green, all of which come to the soil surface with the evaporation of water, causing damage to the roots of crops and even weeds and affecting their normal growth. The law of the birth and death of saline-alkali land is that it comes with water and goes with water. When the temperature is high, salt and alkali are more soluble in water and the effect is better. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of one aspect of the present invention is to provide a method for discharging salt and alkali through a concealed pipe, wherein the specific steps of the method are: S1. A main pipeline is buried at the boundary of the field. One end of the main pipeline leads to the water collection tank, and the first branch pipeline is set in a vertical direction at the other end; S2. Set up observation pits in the same direction and perpendicular to the main pipeline in the center line of the field; S3. Set up the remaining branch pipes and switch control pipes according to the observation pit; S4. Connect the fish pond to the water collection pool, and set drainage pipes around the fish pond.

[0004] Preferably, water seepage holes are provided on the main pipe and the branch pipes in S1.

[0005] Preferably, the buried depth of the main pipeline in S1 is 2-2.5 meters, and the buried depth difference between the end of the main pipeline near the water collection tank and the end far from the water collection tank is more than 0.5 meters.

[0006] Preferably, switch control pipelines are sequentially arranged on the branch pipelines in S1, and the switch control pipelines are connected with the branch pipelines through a U-shaped structure.

[0007] Preferably, the U-shaped structure in S1 consists of three elbows and a tee.

[0008] Preferably, a baffle and a control rod are arranged in the switch control pipe in S1, the baffle is slidably connected to the switch control pipe, and a switch cap is arranged on the ground of the switch control pipe.

[0009] Preferably, the buried depth of the branch pipeline in S1 is 2-2.5 meters, and the buried depth difference between the end of the branch pipeline near the main pipeline and the end far from the main pipeline is more than 0.5 meters.

[0010] Preferably, the observation pit 4 in S2 is 2.5 meters deep and has a width that can be formed. The distance between adjacent observation pits is 10 meters. The distance between the first observation pit and the first branch pipeline in the same direction as the main pipeline is 10 meters. The distance between the first observation pit and the main pipeline in a direction perpendicular to the main pipeline is 10 meters.

[0011] Preferably, in S3, the remaining branch pipes and switch control pipes are set according to the water level height of the observation pit; for the observation pits in the same direction as the main pipe, a branch pipe is set at a distance twice as far as the observation pit where the water level drops from the first observation pit to 1.6 meters; for the observation pits in a direction perpendicular to the main pipe, a switch control pipe is set at a distance twice as far as the observation pit where the water level drops from the first observation pit to 1.6 meters.

[0012] Preferably, the fish pond 6 in S4 is 1.8 meters deep, and is watertight around the perimeter and bottom with thick plastic sheeting. A circle of drainage pipes is arranged around the bottom of the thick plastic sheeting, and the drainage pipes are connected to a water collection tank to collect seepage water. The beneficial effects of the present invention are as follows: The method of draining salt and alkali through concealed pipes designed by the present invention can improve the transformation of cultivated land, effectively tap the potential of per unit yield, develop forage and modern animal husbandry in saline-alkali land according to local conditions, expand diversified food channels, manage ecologically fragile saline-alkali areas, improve windbreak and sand fixation capabilities, prevent desertification of saline-alkali land, and improve agricultural production conditions and ecological environment. Adding fish ponds can enrich product diversity and increase production.

[0013] Additional aspects and advantages of the invention will become apparent from the following description, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the connection between the main pipeline and the branch pipeline in an embodiment of the present invention; Figure 2 This is a schematic diagram of a branch pipeline according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a fish pond according to an embodiment of the present invention; in, Figure 1 , Figure 2 and Figure 3 The corresponding relationship between the reference numerals and the component names is as follows: 1 is the main pipeline, 2 is the water collection tank, 3 is the branch pipeline, 4 is the observation pit, 5 is the switch control pipeline, 6 is the fish pond, 7 is the elbow, 8 is the tee, 9 is the baffle, 10 is the control rod, 11 is the switch cap, and 12 is the drain pipe. DETAILED DESCRIPTION

[0015] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0016] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from the description. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0017] S1. A main pipeline 1 is buried at the boundary of the field. One end of the main pipeline 1 leads to a water collecting tank 2, and the other end is vertically provided with a first branch pipeline 3. Seepage holes are provided on both the main pipeline 1 and the branch pipeline 3. The buried depth of the main pipeline 1 is about 2 meters. The buried depth difference between the end of the main pipeline 1 near the water collecting tank 2 and the end far from the water collecting tank 2 is about 0.5 meters. Switch control pipelines 5 are arranged in sequence on the branch pipelines 3. The switch control pipeline 5 is connected to the branch pipeline 3 through a U-shaped structure. The U-shaped structure consists of three elbows 7 and a tee 8. A baffle 9 and a control rod 10 are arranged in the switch control pipeline 5. The baffle 9 is slidably connected to the switch control pipeline 5. A switch cap 11 is arranged on the ground of the switch control pipeline 5. The buried depth of the branch pipeline 3 is about 1.6 meters. The buried depth difference between the end of the branch pipeline 3 near the main pipeline 1 and the end far from the main pipeline 1 is about 0.5 meters.

[0018] S2. Observation pits 4 are set up on the center line of the field in the same direction and perpendicular direction of the main pipeline 1. The depth of the observation pits 4 is 2.5 meters and the width is based on the shape. The distance between adjacent observation pits 4 is 10 meters. The distance between the first observation pit 4 and the first branch pipeline 3 in the same direction as the main pipeline 1 is 10 meters. The distance between the first observation pit 4 and the main pipeline 1 perpendicularly is 10 meters.

[0019] S3. Set the remaining branch pipes 3 and switch control pipes 5 according to the observation pit 4, and set the remaining branch pipes 3 and switch control pipes 5 according to the water level of the observation pit 4; when setting the second branch pipe 3, check the water level of the observation pit 4 first, observe the pit 4 in the same direction as the main pipe 1, and set the branch pipe 3 at the observation pit 42 times the distance of 1.6 meters from the first observation pit 4; observe the pit 4 in the vertical direction of the main pipe 1, and set the switch control pipe 5 at the observation pit 42 times the distance of 1.6 meters from the first observation pit 4. When the soil pH value is around 7.5 and in summer, watering, including drip irrigation, should be turned off in time to prevent water and fertilizer loss, which may cause crops to dehydrate and lose fertilizer, resulting in reduced production.

[0020] S4. The fish pond 6 is connected to the water collecting pool 2, and drainage pipes 12 are arranged around the fish pond 6. The fish pond 6 is 1.8 meters deep, and thick plastic sheets are used to isolate water around the periphery and the bottom. A circle of drainage pipes 12 is arranged around the bottom of the thick plastic sheet, and the drainage pipes 12 are connected to the water collecting pool 2 to collect the seepage water. This prevents the land around the fish pond from inevitably forming a phenomenon of salt and alkali backflow, which will cause the land around the fish pond to reduce production and fail to harvest. The water seepage water in the water collecting pool 2 is pumped into the fish pond 6 by a water pump.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may also have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for draining salt and alkali through a concealed pipe, characterized in that: The specific steps of the method are: S1. A main pipeline (1) is buried at the boundary of the field, one end of the main pipeline (1) leads to a water collection tank (2), and a first branch pipeline (3) is arranged in a vertical direction at the other end; S2. Setting observation pits (4) in the same direction and perpendicular direction along the main pipeline (1) at the center line of the field; S3. According to the observation pit (4), the remaining branch pipes (3) and the switch control pipe (5) are set; S4. A fish pond (6) is connected to the water collection pool (2), and drainage pipes (12) are arranged around the fish pond (6).

2. The method for draining salt and alkali through a concealed pipe according to claim 1, characterized in that: In the S1, both the main pipeline (1) and the branch pipeline (3) are provided with water seepage holes.

3. The method for draining salt and alkali through a concealed pipe according to claim 1, characterized in that: The buried depth of the main pipeline (1) in S1 is 2 to 2.5 meters, and the buried depth difference between the end of the main pipeline (1) near the water collection tank (2) and the end far from the water collection tank (2) is more than 0.5 meters.

4. The method for draining salt and alkali through a concealed pipe according to claim 1, characterized in that: The branch pipeline (3) in S1 is provided with a switch control pipeline (5) in sequence, and the switch control pipeline (5) is connected to the branch pipeline (3) via a U-shaped structure.

5. The method for draining salt and alkali through a concealed pipe according to claim 4, characterized in that: The U-shaped structure in S1 is composed of three elbows (7) and a tee (8).

6. The method for draining salt and alkali through a concealed pipe according to claim 4, characterized in that: A baffle (9) and a control rod (10) are arranged in the switch control pipe (5) in S1, the baffle (9) is slidably connected to the switch control pipe (5), and a switch cap is arranged on the ground of the switch control pipe (5).

7. The method for draining salt and alkali through a concealed pipe according to claim 1, characterized in that: The buried depth of the branch pipeline (3) in S1 is 2 to 2.5 meters, and the difference in buried depth between the end of the branch pipeline (3) near the main pipeline (1) and the end far from the main pipeline (1) is more than 0.5 meters.

8. The method for draining salt and alkali through a concealed pipe according to claim 1, characterized in that: The observation pit (4) in S2 is 2.5 meters deep and has a width that can be formed. The distance between adjacent observation pits (4) is 10 meters. The distance between the first observation pit (4) and the first branch pipeline (3) in the same direction as the main pipeline (1) is 10 meters. The distance between the first observation pit (4) and the main pipeline (1) in a direction perpendicular to the main pipeline (1) is 10 meters.

9. The method for draining salt and alkali through a concealed pipe according to claim 1, characterized in that: In the above-mentioned S3, the remaining branch pipes (3) and the switch control pipe (5) are arranged according to the water level height of the observation pit (4); the branch pipe (3) is arranged at a distance of 2 times the observation pit (4) from the first observation pit (4) where the water level drops to 1.6 meters in the same direction as the main pipe 1; and the switch control pipe (5) is arranged at a distance of 2 times the observation pit (4) from the first observation pit (4) where the water level drops to 1.6 meters in the vertical direction to the main pipe (1).

10. The method for draining salt and alkali through a concealed pipe according to claim 1, characterized in that: The fish pond (6) in S4 is 1.8 meters deep, and is watertight around the perimeter and bottom of the pond with thick plastic sheeting. A circle of drainage pipes (12) is arranged around the bottom of the thick plastic sheeting, and the drainage pipes (12) are connected to a water collection tank (2) to collect seepage water.

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