A device suitable for irrigation of slope farmland

Abstract

The present invention discloses a device suitable for irrigation of slope farmland. A water reservoir is arranged at the top of the slope. A plurality of drainage pipes are connected to the bottom of the water reservoir. Each drainage pipe is arranged from top to bottom in an S-shape along the height direction of the slope. The water outlet of the drainage pipe is connected to the ditch. A gate is arranged at each bend of the S-shaped drainage pipe. The present invention can store water on rainy days and drain water on sunny days. It can also be used for external water diversion irrigation, realizing efficient utilization of water resources at low economic cost. The drainage pipe and the gate adopt segmentation technology. The S-shaped drainage pipe can be widely used in hilly, basin and other terrains. The relationship between the water pressure of the pipe and the gravity of the gate is used to realize automatic water storage and drainage, so as to avoid excessive water pressure at the lower end of the pipe, and to ensure smooth water discharge.

Description

Technical Field

[0001] The invention relates to the technical field of farmland irrigation, and in particular to a device suitable for irrigating sloped farmland. Background Art

[0002] Irrigation is not only related to crop yields, but also closely related to global water consumption. However, the current farmland irrigation facilities are either too simple, resulting in serious waste of water resources; or relatively advanced, but the economic cost of irrigation is too high, which is not applicable to most areas, especially mountainous farmland. Therefore, it is very necessary to design an irrigation system that can adapt to local conditions and give full play to the characteristics of mountainous terrain to achieve low-cost optimization. Summary of the invention

[0003] The purpose of the present invention is to provide a farmland irrigation system based on slope topography, which can automatically store water on rainy days, effectively drain water after sunny days, or artificially introduce water sources.

[0004] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0005] A device suitable for irrigating sloped farmland, wherein a water reservoir is arranged on the top of the slope, and a plurality of drainage pipes are connected to the bottom of the water reservoir, each drainage pipe is arranged in an S shape from top to bottom along the height direction of the slope, the water outlet of the drainage pipe is connected to a ditch, and a gate is arranged at each bend of the S-shaped drainage pipe.

[0006] The drainage pipe can be regarded as a connection of multiple sections of pipes, and the total length of the drainage pipe can be determined according to different terrains and different altitudes. The drainage pipe is generally designed in an "S" shape to facilitate buffering of the downstream water flow.

[0007] Furthermore, the gate is connected to the bend of the drainage pipe through a rotating shaft, wherein the gate and the rotating shaft are made of stainless steel, covered with a rubber layer, and have a high degree of sealing. The gate includes an external gate and an internal gate connected by rotation, the internal gate is located in the drainage pipe, and the external gate is outside the drainage pipe. The mass of the external gate is greater than that of the internal gate. Under the action of gravity, the external gate forces the internal gate to press against the inner wall of the pipe, thereby playing a role in sealing and blocking water.

[0008] Preferably, a flow rate control device is also provided on the gate at the end of each drainage pipe. Since an excessively high water velocity is prone to cause accidents and waste such as insufficient irrigation, a flow rate control device is introduced. The flow rate control device can be provided on the last section of the pipe. When the water begins to be discharged, the water pressure at the bottom of the pipe is extremely high, and the water flows from the valve into the upper hydraulic device. According to Pascal's theorem, the pressure on both sides of the hydraulic pipe is equal, that is, a greater force can be applied to the other end of the hydraulic pipe, so that the gate is closed or even closed, and the flow rate in the lowest section of the pipe is slowed down; after the slowdown, the pressure in the valve drops, the gate opens slightly, the flow rate increases, and the flow rate flows into the valve again, activating the flow rate control device. This cycle is repeated to achieve a dynamic balance, so that the water flows out evenly.

[0009] After the water in the reservoir is drained, the remaining water in the pipe can be stored there for subsequent external water diversion and irrigation: by turning on the water storage switch and allowing external water to flow into the drainage pipe, uniform and stable irrigation of the farmland ditches can be achieved, thereby improving irrigation efficiency.

[0010] Furthermore, a cross-sectional schematic diagram of the flow rate control device includes a steel capillary tube, one end of the capillary tube is fixedly connected to an external gate, and the other end is fixedly connected to a downstream drainage pipe, and the other end is connected to the downstream drainage pipe, and a valve is provided at the connection with the drainage pipe. Liquid blocks, air layers, oil layers and rubber tubes are sequentially provided in the capillary tube from the valve to the end away from the valve, and one end of the capillary tube fixedly connected to the external gate is in a trumpet shape.

[0011] Furthermore, a water storage switch is provided at the water inlet of the drainage pipe in the water reservoir, and the water storage switch includes a fir block, a pulley, a water storage cover, thin rope one and thin rope two. One end of the fir block is fixedly connected to thin rope one, and the other end of thin rope one passes around the pulley and is fixedly connected to the water storage cover. One end of thin rope two is fixedly connected to the water storage cover, and the other end extends out of the water reservoir and is located outside the water reservoir.

[0012] Preferably, the water reservoir is fixed to the top of the ramp by brackets.

[0013] Preferably, the drainage pipe is made of PVC hard plastic with a square cross section. The water reservoir can also be made of PVC soft plastic with metal brackets around it to ensure strength.

[0014] Preferably, the upper end of the drainage pipe is buried in the soil on the top of the slope.

[0015] At the beginning of rainfall, rainwater in the reservoir flows into the drainage pipe from the water storage switch and gradually fills up the first section of the pipe; at this time, the gate is slightly opened, and rainwater flows into the second section of the drainage pipe and gradually fills up the second section of the pipe; and so on. As the rainfall time progresses, rainwater will gradually fill up the entire drainage pipe and slowly flow out through the bottom section of the pipe.

[0016] Since the bottom gate is slightly open and the water flows slowly, the overall water level in the water supply pipe is still rising until it reaches a certain water level in the reservoir. The fir with lower density floats up and pulls the water storage cover through the pulley to close it. At this time, it enters the water storage mode: the water level in the upper reservoir gradually rises; since there is no rainwater input in the lower water supply pipe, after a small amount of water flows out, the gates are closed and water is stored. There are holes around the upper part of the reservoir. Under normal circumstances, the water level will not be higher than 1 meter. If the water level is close to 1 meter, it will flow out through the holes, thus ensuring overall safety.

[0017] After the weather clears up, a large amount of rainwater is still stored in the reservoir and water supply pipes. You can pull the thin rope connected to the edge of the reservoir and each water storage cover to open the water storage switch. At this time, it enters the drainage mode: the water pressure on the first gate is greater than its set water pressure, so it opens smoothly; the water flows into the second section of the pipe, and the second gate also opens smoothly; and so on, all gates open quickly, forming a domino effect, and the water flows into the last section of the pipe at high speed.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention can store water on rainy days and drain water on sunny days, and can also be used for external water diversion irrigation, realizing efficient use of water resources at low economic cost. The drainage pipe and gate adopt segmentation technology, and the S-shaped drainage pipe can be widely used in hills, basins and other terrains. The relationship between the water pressure of the pipe and the gravity of the gate is used to realize automatic water storage and drainage, so as to avoid excessive water pressure at the lower end of the pipe, and to ensure smooth water discharge; the water storage switch system uses the principle of buoyancy and fixed pulley, and can automatically close to store water after reaching a certain water level, and can also be opened more conveniently for drainage; the flow rate control device is located at the bottom of the drainage pipe, and the hydraulic pipe is designed in layers, and the Pascal principle is used to automatically control the closure of the gate to prevent the flow rate from being too fast, thereby achieving dynamic balance, and the water flow can flow out evenly, making irrigation more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front cross-sectional view of a device suitable for irrigation of sloped farmland according to the present invention.

[0021] Figure 2 It is a side sectional view of a device suitable for irrigation of sloped farmland according to the present invention.

[0022] Figure 3 is a schematic diagram of a drainage pipe cross section with the gate closed.

[0023] Figure 4 is a schematic diagram of the drainage pipe cross section with the gate open.

[0024] Figure 5 It is a schematic cross-sectional view of a water storage switch, in which the water storage switch is in an open state.

[0025] Figure 6 It is a cross-sectional schematic diagram of a water storage switch, in which the water storage switch is in a closed state.

[0026] Figure 7 It is a cross-sectional schematic diagram of a flow rate control device. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0028] Figure 1 , Figure 2 Shown are the front cross-sectional view and the side cross-sectional view of the present invention, in which a device suitable for irrigation of sloped farmland is arranged on a slope 1, a water reservoir 2 is arranged on the top of the slope, a plurality of drainage pipes 5 are connected to the bottom of the water reservoir, the drainage pipes 5 are arranged in an S shape on the slope, the water outlet ends of the drainage pipes are connected to the ditch 4, and a gate 6 is arranged at each bend of the S-shaped drainage pipe.

[0029] A flow rate control device 7 is also provided on the gate at the end of each drainage pipe. Figure 1 It is only shown that the flow rate control device is arranged at the end of the drainage pipe, and the flow rate control device can also be arranged on the gate of each section of the drainage pipe.

[0030] The water reservoir is fixed to the top of the ramp by brackets 3. The water reservoir 2 is located on the upper part of the slope 1 and is made of PVC soft plastic. It is about 1 meter high and occupies an area depending on the specific situation. It is supported by metal brackets 3 on all sides to ensure strength. The drainage pipe 5 is located outside the slope and placed according to the slope. Its uppermost end is buried in the soil on the top of the slope and is connected to the bottom of the water reservoir 2. The drainage pipe 5 is made of PVC hard plastic and has a square cross-section. It can be regarded as a connection of multiple sections of pipes, and the total length of the drainage pipe can be determined according to different terrains and different heights. The drainage pipe 5 is generally designed in an "S" shape to facilitate buffering the downward water flow. Each gate 6 is located at the turning point of the drainage pipe 5 to play a layered water blocking role. The water flow in the drainage pipe 5 will eventually flow into the ditch 4 to effectively irrigate the farmland.

[0031] Figure 3 , 4The figure shows a cross-sectional schematic diagram of a drainage pipe of a device suitable for irrigation of sloped farmland of the present invention. The gate is connected to the bend of the drainage pipe through a rotating shaft, wherein the gate 6 and the rotating shaft 8 are both made of stainless steel, covered with a rubber layer, and have a high degree of sealing. The gate 6 includes an external gate 61 and an internal gate 61 which are rotatably connected through a rotating shaft. The internal gate is located in the drainage pipe 5, and the external gate is outside the drainage pipe 5. The mass of the external gate 61 is greater than that of the internal gate 61. Under the action of gravity, the external gate forces the internal gate 61 to press against the inner wall of the pipe, playing a role of sealing and blocking water. It can be designed so that the water depth in each section of the pipe is close to the height difference between the internal and external gates, that is, when the section of the pipe is nearly filled, the water pressure causes the gate 6 to open automatically.

[0032] Figure 7 The figure shows a schematic cross-sectional view of a flow rate control device of a device suitable for irrigation of sloped farmland according to the present invention, comprising a thin steel tube, one end of which is fixedly connected to an external gate, and the other end of which is fixedly connected to a downstream drainage pipe, and the other end is connected to the downstream drainage pipe, a valve 14 is provided at the connection point with the drainage pipe, and a liquid block 15, an air layer 16, an oil layer 17 and a rubber tube 18 are sequentially provided in the thin tube from the valve to the end away from the valve, and one end of the thin tube fixedly connected to the external gate is in a bell-mouth shape.

[0033] Since the water level in the drainage pipe 5 is too high during water discharge, the water flow rate is too fast, which is easy to cause accidents, so this flow rate control device is designed to control the water speed. The air layer plays a stratification role and has good sealing performance. Due to the driving effect of the liquid block, pressure is generated in the capillary tube, pushing the oil layer to move away from the valve end, and compressing the rubber tube 18 to deform, so that the external valve is downward, driving the internal valve upward, and closing the valve. In the early stage of water discharge, the water pressure in the end pipeline is extremely large, and the water flow quickly flows into the capillary tube, rushing open the valve 14, pushing the liquid block 15, and then compressing the air layer 16, and applying thrust to the oil layer 17. According to Pascal's theorem, the pressure at both ends of the oil layer 17 is equal, and the area of ​​the other end is larger, so the oil layer 17 will exert force on the external gate, so that the gate 6 is closed or even closed, and the flow rate in the bottom pipeline is reduced; after the flow rate decreases, the pressure in the valve drops, the gate opens slightly, the flow rate increases, and then flows into the valve, activating the flow rate control device. This cycle repeats itself to achieve a dynamic balance, allowing water to flow out evenly.

[0034] At the beginning of rainfall, rainwater in the reservoir 2 flows down the drainage pipe 5 and gradually fills up the first section of the pipe; at this time, the gate 6 is slightly opened, and rainwater flows into the second section of the drainage pipe and gradually fills up the second section of the pipe; and so on, as the rainfall time progresses, rainwater will gradually fill up the entire drainage pipe 5 and slowly flow out through the bottom section of the pipe.

[0035] Figure 5 , 6The figure shows a cross-sectional schematic diagram of a water storage switch of a device suitable for irrigation of sloped farmland according to the present invention, the water storage switch comprises a fir wood block 9, a pulley 10, a water storage cover 11, a thin rope 12 and a thin rope 2 13. One end of the fir wood block is fixedly connected to the thin rope 1, the other end of the thin rope 1 passes over the pulley and is fixedly connected to the water storage cover, one end of the thin rope 2 is fixedly connected to the water storage cover, and the other end extends out of the water storage tank and is located outside the water storage tank.

[0036] When the drainage pipe is full of water, the water flow rate is extremely slow due to the slight opening of the lowest gate, and the water volume is greater than the water output, so the overall water level in the water supply pipe is still rising. When the water level in the reservoir 2 reaches a certain level, the fir block 9 with a smaller density and a larger volume floats up, and the water storage cover 11 is pulled by the thin rope 1 and the pulley 10 to make it horizontal, and is covered at the water inlet of the drainage pipe to close the water inlet of the drainage pipe. At this time, the water storage mode is entered: the water level in the upper reservoir gradually rises; since there is no rainwater input in the lower water supply pipe, the gates are closed and water is stored after a small amount of water flows out. There are holes around the upper part of the reservoir. Under normal circumstances, the water level will not be higher than 1 meter. If the water level is close to 1 meter, it will flow out through the holes, thereby ensuring overall safety. If the thin rope 13 is pulled up and the water storage cover 11 is opened, drainage can be achieved.

[0037] After the weather clears up, a large amount of rainwater is still stored in the water reservoir 2 and the water supply pipe 5. At this time, the water storage switch can be turned on to enter the drainage mode: the water pressure on the first gate 6 is greater than its set water pressure, so it opens smoothly; the water flows into the second section of the pipe, and the second gate 6 also opens smoothly; and so on, all the gates 6 are opened quickly, forming a domino effect, and the water flows out through the last section of the pipe into the ditch 4.

[0038] The remaining water in the pipeline can be stored therein for subsequent external water diversion and irrigation: by turning on the water storage switch and allowing external water to flow into the drainage pipe, uniform and stable irrigation of the farmland ditches can be achieved, thereby improving irrigation efficiency.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The undescribed parts involved in the present invention are the same as the prior art or are implemented using the prior art.

Claims

1. A device suitable for irrigation of sloped farmland, characterized in that : A water reservoir is set at the top of the ramp, and the bottom of the water reservoir is connected to multiple drainage pipes. Each drainage pipe is set from top to bottom along the height direction of the ramp in an S shape. The water outlet of the drainage pipe is connected to the ditch, and a gate is set at each bend of the S-shaped drainage pipe; A flow rate control device is also provided on the gate at the end of each drainage pipe; the flow rate control device comprises a steel capillary tube, one end of which is fixedly connected to the external gate, and the other end is fixedly connected to the downstream drainage pipe, and the other end is connected to the downstream drainage pipe, and a valve is provided at the connection with the drainage pipe, and a liquid block, an air layer, an oil layer and a rubber tube are sequentially provided in the capillary tube from the valve to the end away from the valve, and one end of the capillary tube fixedly connected to the external gate is in a bell-mouth shape; The gate is connected to the bend of the drainage pipe through a rotating shaft. The gate includes an external gate and an internal gate connected by rotation. The internal gate is located inside the drainage pipe, and the external gate is outside the drainage pipe. The mass of the external gate is greater than that of the internal gate. Under the action of gravity, the external gate prompts the internal gate to press against the inner wall of the pipe, thereby playing a role in sealing and blocking water.

2. A device suitable for irrigation of sloped farmland according to claim 1, characterized in that A water storage switch is provided at the water inlet of the drainage pipe in the water reservoir, and the water storage switch comprises a fir block, a pulley, a water storage cover, a thin rope 1 and a thin rope 2. One end of the fir block is fixedly connected to the thin rope 1, and the other end of the thin rope 1 passes around the pulley and is fixedly connected to the water storage cover. One end of the thin rope 2 is fixedly connected to the water storage cover, and the other end extends out of the water reservoir and is located outside the water reservoir.

3. A device suitable for irrigation of sloped farmland according to claim 1, characterized in that :The water reservoir is fixed to the top of the ramp by brackets.

4. A device suitable for irrigation of sloped farmland according to claim 1, characterized in that :The drainage pipe is made of PVC hard plastic and has a square cross-section.

5. A device suitable for irrigation of sloped farmland according to claim 4, characterized in that :The upper end of the drainage pipe is buried in the soil on the top of the slope.

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