An agricultural field drainage system

Abstract

The application discloses a farmland drainage system, which comprises a water collecting well for collecting redundant water in farmland, a water pumping and draining system and a drainage pipeline, the water pumping and draining system comprises a solar-powered submersible pump, and the end of the drainage pipeline is connected with an open ditch; the system is characterized in that the system further comprises a siphon supplementary drainage system, the siphon supplementary drainage system comprises a siphon water inlet pipe and a water outlet combination device, the siphon water inlet pipe is connected with the drainage pipeline, and the water outlet combination device is arranged at the end of the drainage pipeline; the water outlet combination device comprises a water outlet adjusting device and a water tank, the water tank is fixed at the port of the drainage pipeline, and the drainage pipeline extends into the water tank; the water outlet adjusting device is sleeved outside the drainage pipeline and comprises a water tank water outlet cover which can move axially along the drainage pipeline, and the water tank water outlet cover is pressed at the opening of the water tank through a spring; when the water pressure of the drainage pipeline is enough, the water tank water outlet cover is pushed to move upwards to compress the spring, the water tank is opened, and water is drained.

Description

Technical Field

[0001] This invention relates to a drainage system, and more particularly to a farmland drainage system. Background Technology

[0002] Currently, farmland drainage mostly employs underground pipe drainage technology, which is a highly efficient drainage technique that combines underground pipes to remove excess water from the soil. By burying underground pipes at an appropriate depth in the farmland, excess water is collected in a collection pipe, which then carries the water to a collection well. A submersible pump in the collection well typically pumps the water into open ditches, thereby removing excess water from the soil and appropriately lowering the groundwater level.

[0003] Subsurface drainage systems are typically built outdoors, and solar panels and batteries are usually the main energy sources for the submersible pumps in the collection wells to operate normally. However, due to limitations in sunlight intensity and duration, the power generation intensity and duration of solar panels are limited. Relying solely on solar panels cannot fully guarantee the daily power needs of the submersible pumps, thus limiting the overall efficiency of the drainage system. To effectively improve the power supply efficiency of solar devices, batteries are often installed to store the power generated by the solar panels, achieving "storing power during good times and compensating for power during bad times." While this method can effectively solve the problem of continuous power supply at night and under conditions of poor sunlight, the cost of installing batteries is too high, making it difficult to widely promote in practical applications. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide a farmland drainage system that utilizes siphon action to supplement drainage and improve drainage efficiency.

[0005] Technical Solution: The present invention discloses a farmland drainage system, comprising a pumping system, which includes a collection well for collecting excess water from the farmland, a solar-powered submersible pump, and a drainage pipeline, with the drainage pipe leading to an open ditch at its end; it also includes a siphon-supplemented drainage system, which includes a siphon inlet pipe, a check valve, and an outlet assembly. The siphon inlet pipe is connected to the drainage pipeline and is equipped with a check valve, while the outlet assembly is located at the end of the drainage pipeline. The outlet assembly includes an outlet regulating device and a water tank, which is fixed at the outlet port of the drainage pipeline, with the drainage pipeline extending into the water tank. The outlet regulating device is fitted outside the drainage pipeline and includes a water tank outlet cover that can move axially along the drainage pipeline, with the water tank outlet cover pressed against the opening of the water tank by a spring. When the water pressure in the drainage pipeline is sufficient, it pushes the water tank outlet cover upward, compressing the spring and realizing drainage.

[0006] Preferably, the water outlet regulating device further includes an upper cover and a spring limiting and fixing plate. The spring is disposed between the spring limiting and fixing plate and the water tank outlet cover. The spring limiting and fixing plate abuts against the bottom of the upper cover, and the upper cover is fixed to the drain pipe.

[0007] Preferably, the water outlet regulating device further includes a protective shell, which is fixedly installed on the lower side of the upper cover, and includes a blocking spring and a spring limiting fixing plate.

[0008] Preferably, a lever is fixedly provided on one side of the spring limiting and fixing piece, and a pressure adjustment button is provided on the protective shell to move the lever. Sliding the pressure adjustment button changes the position of the spring limiting and fixing piece.

[0009] Preferably, when the spring limiting fixing plate is at its highest point, the water tank outlet cover closes the water tank, the spring is in its natural state, and its elastic potential energy is zero; when the pressure adjustment button is slid down, the spring's elastic potential energy increases, and the water outlet combination device controls the water outlet pressure to increase.

[0010] Preferably, the water outlet assembly further includes a housing with several water outlet holes, which covers the outside of the water outlet regulating device.

[0011] Preferably, the inlet end of the drainage pipe is provided with a T-connector, which connects the submersible pump drainage pipe and the siphon inlet pipe.

[0012] Preferably, the drainage pipeline includes a connecting pipe that connects the water inlet of the pumping drainage system and the siphon supplementary drainage system, and a negative pressure pipe that connects the negative pressure pipe to the water outlet pipe of the water outlet assembly.

[0013] Preferably, an air vent valve is provided at the highest point of the drainage pipe to remove gas accumulated in the drainage pipe and the negative pressure pipe, thereby maintaining a negative pressure state inside the negative pressure pipe.

[0014] Preferably, a water-stop plastic plug is provided between the water tank outlet cover and the drain pipe to seal the gap between the drain pipe of the water outlet assembly and the water tank outlet cover, preventing water leakage and air intake.

[0015] Working principle: The submersible pump of the drainage system uses the electricity generated by the solar panel to pump the water in the collection well into the open ditch. When the submersible pump cannot work, the siphon supplement drainage system uses the siphon effect to guide the water in the collection well to the open ditch. The water in the drain pipe pushes the water tank outlet cover to move up under the action of pressure difference, and the compression spring opens the water tank to realize drainage.

[0016] Beneficial Effects: Compared with the prior art, the present invention has the following significant advantages: 1. When the water level in the collection well is higher than the water level control threshold value corresponding to the water level control threshold value of the outlet combination device, the system automatically drains water under the action of siphon, and automatically stops draining when the water level in the collection well drops to the water level control threshold value corresponding to the set water level control threshold value of the outlet combination device; it can solve the drainage problem under the condition that the submersible pump stops working; 2. The outlet combination device of the present invention can ensure that the drainage pipeline is always full of water and maintained in a negative pressure state, ensuring that the siphon supplementary drainage system is continuously available under the set conditions; 3. By adjusting the pressure adjustment button of the outlet combination device, the working condition of the siphon supplementary drainage can be adjusted, and the water level in the collection well can be effectively controlled within a certain range; 4. The present invention can operate automatically without external energy, which not only saves energy, but also saves capital investment and labor costs compared with the method of adding a battery, and is suitable for more complex field conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the water outlet assembly device of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the water outlet assembly device of the present invention, showing the separation of the outer shell.

[0020] Figure 4 This is an exploded view of the water outlet regulating device of the present invention;

[0021] Figure 5 This is a cross-sectional view of the water outlet assembly of the present invention. Detailed Implementation

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1 As shown, a farmland drainage system includes a collection well 3, drainage pipes, an open ditch 6, a pumping system, and a siphon-supplemented drainage system. The open ditch 6 is located below the collection well 3. The drainage pipes include a connecting pipe 4 connecting the inlets of the pumping system and the siphon-supplemented drainage system, an outlet pipe 71 located at the end of the pipes, and a negative pressure pipe 5 located between the connecting pipe 4 and the outlet pipe 71.

[0024] The drainage system includes solar panels 11, an inverter 12, a power transmission line 13, a submersible pipe 14, and a submersible pump 15. The drainage pipe connects a collection well 3 and an open ditch 6. The submersible pipe 14 collects excess soil moisture from the farmland and flows it into the collection well 3. The solar panels 11, inverter 12, and power transmission line 13 convert solar energy into electrical energy to power the submersible pump 15. The submersible pump 15 draws water from the collection well 3 and pumps it into the drainage pipe, discharging the water into the open ditch 6. The open ditch 6 collects farmland drainage and transports it to a downstream catchment area.

[0025] The siphon-assisted drainage system includes a siphon inlet pipe 21, a check valve 22, and an outlet assembly 7. A check valve is installed at the upper end of the siphon inlet pipe 21 and connects to the drainage pipe. The check valve 22 prevents water from flowing back through the siphon inlet during submersible pump 15 operation. A T-junction pipe 8 is installed at the inlet end of the connecting pipe 4, connecting the submersible pump drainage pipe 16 and the siphon inlet pipe 21 respectively. An air vent valve 9 is installed at the highest point of the drainage pipe to remove gas accumulated in the connecting pipe 4 and the negative pressure pipe 5, maintaining a negative pressure state within the negative pressure pipe 5.

[0026] like Figure 2-5 As shown, the water outlet assembly 7 is located at the outlet end of the negative pressure pipe 5, including an outlet pipe 71, and can be placed at any elevation below the top of the open ditch 6. The water outlet assembly 7 includes an outlet regulating device 74, a water tank 72, and a housing 73. The water tank 72 has a recessed structure to ensure that it always stores a certain amount of water. The water tank 72 is fixed at the port of the outlet pipe 71, and its inner side is provided with a fixing beam connecting the outlet pipe 71. The outlet pipe 71 extends into the water tank 72 to drain water into the tank. The housing 73 covers the outside of the water outlet assembly 7, is threaded, and has several outlet holes.

[0027] The water outlet regulating device 74 is sleeved outside the water outlet pipe 71 and includes a top cover 741, a spring-limiting fixing plate 742, a spring 743, a water tank outlet cover 744, and a protective shell 745. The top cover 741 is a through-hole frustum shape and is fixedly sleeved on the outside of the water outlet pipe 71, providing a certain degree of protection for the water outlet regulating device 74. The spring-limiting fixing plate 742 abuts against the bottom of the top cover 741, and a lever 746 is fixedly provided on one side. The protective shell 745 is provided with a pressure regulating button 747 that moves the lever 746. Sliding the pressure regulating button 747 changes the position of the spring-limiting fixing plate 742. The spring 743 is located between the spring-limiting fixing plate 742 and the water tank outlet cover 744. When the spring-limiting fixing plate 742 or the water tank outlet cover 744 moves, the state of the spring 743 changes accordingly. The spring-limiting fixing plate 742 and the water tank outlet cover 744 are annular. The water tank outlet cover 744 can move axially along the water outlet pipe 71. A water-stop plastic plug 748 is provided at the contact point between the water tank outlet cover 744 and the water outlet pipe 71. The water tank outlet cover 744 is pressed against the opening of the water tank 72 by a spring 743. When the state of the spring 743 changes, the pressure of the water tank outlet cover 744 on the water tank 72 changes accordingly. The protective shell 745 is fixedly installed on the lower side of the upper cover 741 and can cover the spring 743 and the spring-limiting fixing plate 742. The water outlet regulating device 74 can close the water tank 72 and automatically open the water tank 72 to achieve drainage by relying on the drainage water pressure. When the water pressure is insufficient, the water tank 72 automatically closes, so that the connecting pipe 4 to the water tank 72 is always in a state of full liquid, ensuring that the water level in the collection well 3 can achieve siphon drainage at any time when the elevation is sufficient.

[0028] Adjusting the pressure regulating button 747 compresses the spring 743, storing elastic potential energy and adjusting the water pressure control threshold of the water outlet regulating device 74. When the pressure regulating button 747 is at its highest position, the spring is relaxed, the elastic potential energy is zero, and the water tank outlet cover 744 is just abutting against the opening of the water tank 72, sealing the water tank 72. During drainage, the water pressure pushes up the water tank outlet cover 744, opening the water tank 72 to achieve drainage. When the pressure regulating button 747 moves downward, the elastic potential energy stored in the spring 743 increases, the water outlet assembly generates pressure, the pressure exerted by the water tank outlet cover 744 on the water tank 72 increases, and the water pressure required to push up the water tank outlet cover 744 to achieve drainage increases.

[0029] The pumping and drainage system of the present invention uses the electrical energy generated by the solar panel 11 to pump the water in the collection well 3 into the open ditch 6, and the siphon supplemental drainage system uses the siphon effect to guide the water in the collection well 3 to the open ditch 6.

[0030] In practical application of this invention, first install the pumping and drainage system and the siphon replenishment drainage system, select and set the control threshold of the water outlet combination device, and slide the pressure adjustment button to the appropriate position.

[0031] When the lighting conditions are good and the water level in the collection well 3 is higher than the installation position of the submersible pump 15, the drainage work is mainly carried out by the pumping and drainage system. When the submersible pump 15 is working normally, the drainage accumulates in the water tank 72 of the outlet assembly 7. When a certain amount is reached, the water in the water tank 72 pushes the water tank outlet cover 744 and the spring 743 upward. At this time, the spring 743 is compressed and stores elastic potential energy, and the water is discharged into the open ditch 6 through the water tank 72.

[0032] When the lighting conditions are poor, but the water level in the collection well 3 is high enough that the hydraulic pressure difference between the siphon inlet pipe 21 and the outlet assembly 7 is greater than the water pressure required by the water level control threshold of the outlet assembly 7, the submersible pump 15 stops working. Under the siphon effect, some of the water in the collection well 3 enters the outlet assembly 7 through the siphon inlet pipe 21, connecting pipe 4, and negative pressure pipe 5. The water stored in the water tank 72 pushes the water tank outlet cover 744 and the spring 743 to move upward and open the water tank 72. At this time, the spring 743 stores elastic potential energy, and the water is discharged into the open ditch 6 through the water tank 72.

[0033] When the lighting conditions are poor, or when the water level in the collection well 3 is high enough that the hydraulic pressure difference between the siphon inlet pipe 21 in the collection well 3 and the location of the outlet assembly 7 is not greater than the water pressure required by the water level control threshold of the outlet assembly 7, the submersible pump 15 stops working. The water stored in the water tank 72 is unable to push the water tank outlet cover 744 and the spring 743 of the outlet assembly 7 upward. At this time, the spring 743 releases its elastic potential energy, and the water tank outlet cover 744 of the outlet assembly 7 presses against the opening of the water tank 72, so that the water tank 72 is in a closed state. At this time, some water is still stored in the water tank 72 to maintain the negative pressure state in the negative pressure pipe 5.

Claims

1. A farmland drainage system, comprising a collection well for collecting excess water from farmland, a pumping system, and drainage pipes, wherein the pumping system includes a solar-powered submersible pump, and the drainage pipes terminate in an open ditch; characterized in that, It also includes a siphon-assisted drainage system, which comprises a siphon inlet pipe, a check valve, and an outlet assembly. The siphon inlet pipe is connected to the drainage pipe and is equipped with a check valve. The outlet assembly is located at the end of the drainage pipe. The outlet assembly includes an outlet regulating device and a water tank. The water tank is fixed at the end of the drainage pipe, and the drainage pipe extends into the water tank. The outlet regulating device is fitted outside the drainage pipe and includes a water tank outlet cover that can move axially along the drainage pipe. The water tank outlet cover is pressed against the opening of the water tank by a spring. When the water pressure in the drainage pipe is sufficient, it pushes the water tank outlet cover upward to compress the spring, opening the water tank to achieve drainage.

2. The farmland drainage system according to claim 1, characterized in that, The water outlet regulating device also includes an upper cover and a spring limiting and fixing plate. The spring is disposed between the spring limiting and fixing plate and the water tank outlet cover. The spring limiting and fixing plate abuts against the bottom of the upper cover, and the upper cover is fixed to the drain pipe.

3. The farmland drainage system according to claim 2, characterized in that, The water outlet regulating device also includes a protective shell, which is fixedly installed on the lower side of the upper cover, and includes a blocking spring and a spring limiting fixing plate.

4. The farmland drainage system according to claim 3, characterized in that, A lever is fixedly provided on one side of the spring limiting and fixing plate, and a pressure adjustment button is provided on the protective shell to move the lever. Sliding the pressure adjustment button changes the position of the spring limiting and fixing plate.

5. The farmland drainage system according to claim 4, characterized in that, When the spring limiting and fixing plate is at its highest point, the water tank outlet cover closes the water tank, the spring is in its natural state, and its elastic potential energy is zero; when the pressure adjustment button is slid down, the spring's elastic potential energy increases, and the water outlet combination device controls the water outlet pressure to increase.

6. The farmland drainage system according to claim 1, characterized in that, The water outlet assembly also includes a housing with several water outlet holes, which covers the outside of the water outlet regulating device.

7. The farmland drainage system according to claim 1, characterized in that, The drainage pipe is equipped with a T-connector at the water inlet end, which connects the submersible pump drainage pipe and the siphon water inlet pipe.

8. The farmland drainage system according to claim 1, characterized in that, The drainage pipeline includes a negative pressure pipe, which is connected to the water outlet assembly.

9. The farmland drainage system according to claim 1, characterized in that, An air vent valve is installed at the highest point of the drainage pipe.

10. The farmland drainage system according to claim 1, characterized in that, A water-stop plastic plug is installed between the water tank outlet cover and the drainage pipe.

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