Irrigation system based on canal

Abstract

An irrigation system based on a water channel comprises the water channel and a vehicle body walking on the water channel, and the vehicle body comprises a centrifugal pump, a spray gun and a water inlet pipe; a water inlet of the centrifugal pump is connected with a water inlet pipe; the water inlet pipe ascends and descends on the vehicle body in the vertical direction; a water outlet of the centrifugal pump is connected with the spray gun; the bottom end of the water inlet pipe is connected with a bottom valve; a protective cover covers the outer side of the bottom valve; the bottom valve is a one-way valve, and a wrench is arranged on the bottom valve and can reversely open the bottom valve. The utility model discloses an irrigation system based on a water channel, which can be used for irrigating a farmland, has the characteristics of high controllability in an irrigation process, high irrigation efficiency, better irrigation effect, water saving and uniform irrigation, is easy to implement in the field, has practical significance in accelerating and promoting agricultural modernization, and has a wide application prospect. The influence of the plant height is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of farmland irrigation, and in particular relates to an irrigation system based on a canal. Background Art

[0002] Currently, modern smart agricultural facilities are primarily found in facility agriculture, such as modern greenhouses and cash crop cultivation, primarily serving cash crops. Field staple crops are still largely cultivated manually, mostly using flood irrigation, short-range spray guns, or large sprinklers.

[0003] Among them, short-distance spray guns require laying a large number of pipes in the farmland, which is very costly and seriously affects the planting and harvesting of crops; large sprinklers are expensive, and power cords need to be dragged during irrigation, and the spray pipes are uneven, which can easily cause crushing of tall crops.

[0004] Patent publication number CN214015389U discloses a farmland irrigation robot, comprising a base, the bottom of which is driven by a walking structure and tracks located in a canal; a water tank secured to the base by columns and connected to the canal via a water pump and a water pipe equipped with an on / off valve; and multiple nozzles of varying lengths located on the sides of the water tank, connected to a compressor that generates high pressure within the water tank, causing water to be ejected from the nozzles. This utility model achieves the following beneficial effects: a wide spraying range, high efficiency, good spraying effect, high stability and reliability, and water conservation.

[0005] This structure has the following problems: 1. A nozzle is provided on the vehicle body, and the width of the nozzle is used to adjust the irrigation width, which is inconvenient to use for tall crops; 2. A water tank is provided on the vehicle body, and the water drawn from the canal will enter the nozzle after passing through the water tank, making the entire structure more cumbersome and not convenient to use.

[0006] Patent application number CN115804333A discloses a farmland irrigation robot, a control assembly for the robot, and an irrigation method using the control assembly. Developed by the inventors, the application discloses the following: The farmland irrigation robot comprises a body and a chassis located at the bottom of the body, with wheels disposed on the chassis; a sprinkler assembly is disposed on the body, and the sprinkler assembly includes a power module, a water pump, and a spray gun. The power module supplies power to the water pump, and the water pump's inlet pipe is movably mounted on the body. The water pump's outlet is connected to the spray gun, which is mounted on the body. The control method described in the present invention features compact steps, low power consumption during operation, and stable movement of the robot along a canal, making it less susceptible to external interference. Furthermore, the robot's actual trajectory closely matches the preset trajectory, with minimal deviation, significantly ensuring effective irrigation and vehicle operation.

[0007] However, there are the following problems during use: this solution requires adding water to the water inlet pipe when starting the water pump, so that it can be started, which is relatively troublesome and requires repeated disassembly of mechanical parts, which can easily cause damage to the equipment. Summary of the Invention

[0008] The utility model aims to provide an irrigation system based on a canal with a simple structure and good use effect.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: an irrigation system based on a canal, comprising a canal and a vehicle body moving on the canal, wherein a centrifugal pump, a spray gun, a water inlet pipe and a water outlet pipe are provided on the vehicle body; the water inlet of the centrifugal pump is connected to the water inlet pipe, and the water inlet pipe rises and falls along the vertical direction on the vehicle body; the water outlet of the centrifugal pump is connected to the spray gun through the water outlet pipe; the bottom end of the water inlet pipe is connected to a bottom valve, a filter is provided at the bottom end of the bottom valve, and a protective cover is provided on the outer cover of the bottom valve; the bottom valve is a one-way valve, and a wrench is provided on the bottom valve, which can open the bottom valve in the reverse direction.

[0010] A main controller is also provided on the vehicle body, and a pressure sensor, a flow sensor and a flow valve are connected to the water outlet pipe; the signal output ends of the pressure sensor and the flow sensor are connected to the main controller.

[0011] The water inlet pipe is connected with a liquid level sensor; the signal output end of the liquid level sensor is connected to the main controller.

[0012] An IoT card is connected to the main controller.

[0013] A crawler track and a travel motor are provided at the bottom of the vehicle body, and the crawler track drives the vehicle body to move on the canal through the travel motor.

[0014] A diaphragm pump is also provided on the vehicle body, and a water outlet of the diaphragm pump is connected to a water inlet pipe.

[0015] A camera is provided on the rear side of the water outlet of the spray gun.

[0016] A diesel generator and a power adapter are installed in the vehicle body. The diesel generator supplies power to the travel motor and the power adapter; the power adapter supplies power to the main controller and the diaphragm pump.

[0017] A mounting seat is provided at the bottom end of the water inlet pipe, and the bottom valve is installed on the water inlet pipe through the mounting seat.

[0018] The liquid level sensor is arranged on the mounting base, and the liquid level sensor transmits the collected liquid level information to the main controller.

[0019] Through the above technical scheme, the technical effects of the present invention are as follows: 1. The present invention can irrigate farmland, and the irrigation process saves time and effort. It only needs to fill water into the canal. As the vehicle body moves on the canal, the centrifugal pump can suck the water in the canal into the spray gun to achieve irrigation. The irrigation process can save water resources. At the same time, no human participation is required, which reduces the intensity of human labor; 2. The bottom valve provided can ensure the water storage in the water inlet pipe, thereby ensuring the operation of the centrifugal pump and reducing energy consumption; in addition, it can also be opened in reverse in special weather or when the filter is dirty to allow the water in the water inlet pipe to flow out, which can avoid freezing on the one hand and automatically flush the filter on the other hand, which is more convenient to use; 3. The pressure sensor and flow sensor provided can collect the water pressure and flow signals in the outlet pipe. When the water pressure and water flow are lower than the set value, a signal is sent through the Internet of Things card, which effectively avoids the damage of the centrifugal pump caused by dirt blockage or the problem of poor sprinkler irrigation effect caused by dirt blockage; 4. The Internet of Things card provided can realize the networking of the vehicle body, so that the background can know the operation status and operation data of the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of Example 1;

[0021] Figure 2 Schematic diagram of the vehicle body structure;

[0022] Figure 3 for Figure 2 Schematic diagram after rotation;

[0023] Figure 4 for Figure 3 Internal schematic diagram;

[0024] Figure 5 Schematic diagram of the water inlet pipe structure;

[0025] Figure 6 Schematic diagram of the water outlet pipe structure;

[0026] Figure 7 This is a schematic diagram of the bottom valve structure;

[0027] Figure 8 This is a cross-sectional view of the bottom valve;

[0028] Figure 9 This is the circuit schematic diagram of Example 2;

[0029] Figure 10 This is a schematic diagram of the control circuit of Example 5;

[0030] 1-vehicle body; 2-water channel; 3-track; 4-spray gun; 5-camera; 6-tool cabinet; 7-power distribution cabinet; 8-bottom valve; 9-protective cover; 10-wrench; 11-filter; 12-mounting seat; 13-water inlet pipe; 14-liquid level sensor; 15-electric push rod; 16-valve body; 17-valve core; 18-valve body; 19-valve core; 20-centrifugal pump; 21-diaphragm pump; 22-water outlet pipe; 23-pressure sensor; 24-flow sensor; 25-flow regulating valve. DETAILED DESCRIPTION

[0031] Example 1, an irrigation system based on a canal, such as Figures 1 to 8 As shown, the water channel 2 is a paved water channel. When in use, the water channel 2 is laid in the farmland. In essence, it is a trench dug in the farmland. Both sides of the trench are hardened ground. The hardened ground is achieved by hardening with concrete or compacting the soil. In this embodiment, concrete hardening is used.

[0032] A water channel 2 is filled with water, and a vehicle body 1 travels on it. Tracks 3 are located on the bottom of the vehicle body 1. Furthermore, a travel motor (not shown) is provided on the vehicle body 1. This motor drives the tracks 3, thereby moving the vehicle body 1. The movement of the tracks 3 drives the vehicle body 1, and the track 3 has a large contact area with the ground, making the vehicle body 1 more stable. In this embodiment, the travel motor driving the tracks 3 is a mature prior art technique, and this embodiment does not involve improvements in this aspect.

[0033] A centrifugal pump 20, a spray gun 4, a water inlet pipe 13 and a water outlet pipe 22 are provided on the vehicle body 1; the water inlet of the centrifugal pump 20 is connected to the water inlet pipe 13, and the water in the canal 2 can be sucked into the centrifugal pump 20 through the water inlet pipe 13. At the same time, the outlet of the centrifugal pump 20 is connected to the spray gun 4 through the water outlet pipe 22, wherein a rotary seal is provided between the spray gun 4 and the water outlet. The rotary seal is a mature existing technology, and its implementation method will not be repeated in this embodiment.

[0034] The spray gun 4 is located on the top of the vehicle body 1. During the implementation process, the spray gun 4 uses the American Toro P2M piston-driven spray gun. The spray gun 4 is tilted upward by 30 to 45 degrees. The centrifugal pump 20 draws water from the canal 2 into the water inlet pipe 13, and then allows the water to enter the spray gun 4 from the water outlet pipe 22, and finally spray out from the spray gun 4. Under the action of the water, the spray gun 4 rotates on the top of the vehicle body 1, thereby achieving irrigation of the fields on both sides of the canal 2. Among them, when water enters the spray gun 4, the spray gun rotates, which is a prior art. You can refer to the current flower garden irrigation scene. In this embodiment, you can directly connect the water outlet of the commercially available spray gun centrifugal pump 20.

[0035] In this embodiment, the water inlet pipe 13 on the vehicle body 1 can be raised and lowered in the vertical direction, so that when the vehicle body 1 moves from the canal 2 to the ground under the drive of the track 3, the water inlet pipe 13 can be raised so that the water inlet pipe 13 does not affect the normal movement of the vehicle body 1 on the ground.

[0036] In order to ensure that the water inlet pipe 13 is raised and lowered vertically on the vehicle body 1, a vertically arranged electric push rod 15 is provided on the vehicle body 1, and the water inlet pipe 13 is connected to the movable end of the electric push rod 15. The electric push rod used in this embodiment is a mature existing technology and can be purchased directly.

[0037] When the vehicle body 1 moves onto the canal 2, the electric push rod 15 extends, causing the water inlet pipe 13 to descend and eventually fall into the canal 2; when the vehicle body 1 moves down from the canal 2 and before entering the ground, the electric push rod 15 shortens, causing the water inlet pipe 13 to rise, preventing the water inlet pipe 13 from affecting the movement of the vehicle body 1.

[0038] In order to ensure the lifting and lowering of the water inlet pipe 13, the water inlet pipe 13 is set as a soft pipe during implementation, so that the water inlet pipe 13 will not affect the position of the centrifugal pump 20 during the lifting process. In this embodiment, the centrifugal pump 20 is fixed on the vehicle body 1, and only the water inlet pipe 13 is lifted and lowered by the electric push rod 15.

[0039] To ensure the normal operation of the centrifugal pump 20, a diaphragm pump 21 is further provided on the vehicle body 1, and the water outlet of the diaphragm pump 21 is connected to the water inlet pipe 13. When the diaphragm pump 21 is working, water can be pumped into the water inlet pipe 13, thereby ensuring the use effect of the centrifugal pump 20.

[0040] As a supplement to this embodiment, in order to ensure the operation of the diaphragm pump 21, a soft tube is connected to the water inlet of the diaphragm pump 21, and the soft tube is also connected to the electric push rod 15. When the electric push rod 15 drives the water inlet pipe 13 into the canal 2, the soft tube connected to the water inlet of the diaphragm pump 21 is also lowered into the canal 2. In this way, when the diaphragm pump 21 is working, the water in the canal 2 can be pumped into the water inlet pipe 13.

[0041] It is worth noting that the diaphragm pump 21 is only needed to pump water into the water inlet pipe 13 when the device is first started. Normally, due to the one-way flow of the bottom valve 8, water is often stored in the water inlet pipe 13, so the diaphragm pump 21 is not required. In this embodiment, if the bottom valve 8 is not open, the water inlet pipe 13 is full of water and the diaphragm pump 21 is not required to draw water. Only when the water in the bottom valve 8 is released and the water inlet pipe 13 is empty, the diaphragm pump 21 is required to draw water from the water channel 2 into the water inlet pipe 13, facilitating the startup of the centrifugal pump 20.

[0042] In order to protect the diaphragm pump 21, a one-way valve is provided between the water outlet of the diaphragm pump 21 and the water inlet pipe of the centrifugal pump 20. Through the one-way valve, water can only flow from the water outlet of the diaphragm pump 21 into the water inlet pipe of the centrifugal pump 20, and cannot return. In this embodiment, the one-way valve is a commercially available product and is used directly in this embodiment without involving any improvement thereto.

[0043] To improve the performance of this system, a bottom valve 8 is connected to the bottom end of the water inlet pipe 13. The bottom valve 8 is a one-way valve, which means that water can only flow from below the bottom valve 8 to above the bottom valve 8. The water in the water inlet pipe 13 cannot flow out due to the action of the bottom valve 8. In this way, when the centrifugal pump 20 stops working, the water inlet pipe 13 can be filled with water, avoiding the problem of needing to start the diaphragm pump 21 every time, and reducing the power consumption of the entire system. At the same time, a filter screen 11 is connected to the bottom valve 8. Before entering the bottom valve 8, the water must first pass through the filter screen 11 before entering the bottom valve 8. The filter screen 11 can prevent impurities from entering the centrifugal pump 20 through the bottom valve 8.

[0044] The structure of bottom valve 8 is as follows: bottom valve 8 includes a valve body 16 and a valve core 17. Valve core 17 is rotatably mounted within valve body 16. A volute spring is connected to valve core 17. After valve core 17 rotates under the action of water, it is reset by the action of the volute spring. A stopper 18 is provided below the free end of valve core 17. This stopper 18 prevents valve core 17 from rotating downward, only upward, thus achieving a one-way flow. A sealing ring is also provided on valve core 17 to ensure a tight seal between valve core 17 and valve body 16. When water flows above valve core 17, stopper 18 intercepts the water. When water flows in from below valve core 17, the water pressure causes valve core 17 to rotate relative to valve body 16, allowing water to flow above valve core 17.

[0045] A protective cover 9 is provided on the outer side of the bottom valve 8. The protective cover 9 is in the shape of a filter mesh. On the one hand, it ensures the normal operation of water. On the other hand, it filters impurities through the protective cover 9 to protect the bottom valve 8. At the same time, it prevents debris from entering the water inlet pipe 13 through the bottom valve 8, thereby ensuring the normal operation of the entire system.

[0046] During normal operation, under the operation of the centrifugal pump 20, water is filtered through the protective cover 9 and the filter screen 11 and enters the water inlet pipe 13 through the bottom valve 8. The water from the centrifugal pump 20 is sprayed out from the spray gun 4 through the water outlet pipe 22.

[0047] As a supplement to this embodiment, after the centrifugal pump 20 stops working, since the bottom valve 8 is a one-way valve, the water inlet pipe 13 is filled with water. In cold weather, in order to prevent the water in the water inlet pipe 13 from freezing and causing damage, a wrench 10 is provided on the bottom valve 8. The wrench 10 can drive the one-way valve to open in reverse, thereby allowing the water in the water inlet pipe 13 to flow out. This method can, on the one hand, prevent ice from forming in the water inlet pipe 13, and on the other hand, flush the protective cover 9 and the filter at the bottom end of the bottom valve 8, thereby improving convenience during use.

[0048] To achieve this effect, the stopper 18 is connected to the wrench 10; a horizontally arranged hole 19 is provided in the valve body 16, and the hole 19 is arranged toward the stopper 18; the stopper 18 is slidably arranged at the hole 19 in the horizontal direction, and when the wrench 10 drives the stopper 18 to slide into the hole 19, the stopper 18 cannot block the rotation of the valve core 17, so that under the action of water, the valve core 17 rotates downward, and water comes out of the water inlet pipe 13. When the water has come out, the valve core 17 returns to a horizontal state under the action of the volute spring, and then the stopper 18 is pushed out of the hole 19 to block the rotation of the valve body 16.

[0049] Example 2, this example is supplemented on the basis of Example 1 as follows: During the operation of the vehicle body 1, in order to ensure the use effect of the vehicle body 1, as shown in FIG. Figure 9 As shown, the vehicle body 1 is also provided with a main controller U1 (a single chip microcomputer of model STC15F2K60S2_QFP32), a pressure sensor 23 (model: DSTP140 075G1056 G1 / 4 0-16bar 4-20mA, manufactured by: Jiaxing Aoto Maxun Automation Control Technology Co., Ltd.), a flow sensor 24 (ZEF series electromagnetic flow sensor 24, manufactured by: Kaifeng Zhongzhi Industrial Control Instrument Co., Ltd.), and a liquid level sensor 14. Among them, the liquid level sensors all use CYW11 submersible liquid level transmitters.

[0050] The liquid level sensor 14 is connected to the water inlet pipe 13 and is used to collect the liquid level at the water inlet pipe 13. The signal output of the liquid level sensor 14 is connected to the main controller U1. As a supplement to this embodiment, the signal output of the liquid level sensor 14 can be connected to the signal input of the main controller U1 (pin P1.6), so that the liquid level sensor 14 transmits the collected liquid level information to the main controller U1.

[0051] To facilitate the installation of liquid level sensor 14, a mounting base 12 is provided at the bottom end of water inlet pipe 13. Bottom valve 8 is mounted on water inlet pipe 13 via mounting base 12. Liquid level sensor 14 is also mounted on mounting base 12, facing downward. The signal output of liquid level sensor 14 is connected to the signal input of main controller U1. This allows liquid level sensor 14 to collect a liquid level signal at its location and transmit it to main controller U1. Based on the received signal, main controller U1 determines whether centrifugal pump 20 is functioning properly. Here, liquid level sensor 14 is used to measure the water level in the canal.

[0052] The signal output end of the liquid level sensor 14 is connected to the signal input end of the main controller U1. As a supplement to this embodiment, the signal output end of the liquid level sensor 14 can be connected to the signal input end (pin P1.5) of the main controller U1, so that the liquid level sensor 14 transmits the collected liquid level information to the main controller U1.

[0053] A pressure sensor 23 is installed within the outlet pipe 22 to measure the water pressure within the pipe. A flow sensor 24 is also installed within the pipe to measure the flow rate within the pipe. If the pipe is clogged with dirt, the water pressure and flow rate within the pipe will drop below the set values. A flow control valve 25 is also installed within the pipe to adjust the flow rate. While commercially available, this valve is a manual valve.

[0054] The signal output end (pin 2) of the pressure sensor 23 is connected to the signal input end (pin P1.3) of the main controller U1. The pressure sensor 23 is used to collect the water pressure in the water outlet pipe 22 and transmit the collected water pressure signal to the main controller U1.

[0055] The flow sensor 24 is also arranged on the water outlet pipe 22. The signal output end (pin 2) of the flow sensor 24 is connected to the signal input end (pin P1.4) of the main controller U1. The flow sensor 24 is used to collect the flow information in the water outlet pipe 22 and transmit the collected flow information to the main controller U1.

[0056] The pressure sensor 23 and the flow sensor 24 transmit the collected water pressure information and flow information to the main controller U1 respectively. The main controller U1 compares the received signals with the set values. When the result is lower than the set value, the main controller U1 sends a signal.

[0057] In this way, when the water pressure or flow rate in the outlet pipe 22 of the centrifugal pump 20 is too low during operation, the main controller U1 can send a signal in time to prevent blockage from causing insufficient flow rate and affecting the irrigation effect.

[0058] As a supplement to this embodiment, to obtain parameters during the operation of vehicle body 1, an Internet of Things card U2 (SIM800C module) is connected to main controller U1. Main controller U1 transmits the water pressure signal collected by pressure sensor 23, the flow signal collected by flow sensor 24, and the liquid level signal collected by liquid level sensor 14 through Internet of Things card U2. When the water pressure signal and flow signal fall below the set value, main controller U1 also transmits this signal through Internet of Things card U2.

[0059] The SIM800C module is connected to the main controller U1 via a serial port. The actual connection method is as follows: the UART1-TXD and UART1-RXD pins of the SIM800C module are connected to the P1.0 and P1.1 pins of the main controller U1, respectively. The SIM800C module is connected to the card slot via the SIMDATA, SIMCLK, SIMRST, and SIMVDD pins of the SIM800C module.

[0060] In this way, the main controller U1 can send relevant data to the background through the SIM800C module, and the background can learn the working status of the vehicle body 1 in a timely manner based on the data.

[0061] As a supplement to this embodiment, in order to locate the position of the vehicle body 1, a positioning chip (GPS chip is selected) is connected to the main controller U1. The positioning chip can collect position information and transmit the collected position information to the main controller U1.

[0062] The working process of this embodiment is as follows: the vehicle body 1 enters the canal 2 under the drive of the travel motor. After entering the canal 2, the electric push rod 15 drives the water inlet pipe 13 to descend, and the water inlet pipe 13 enters the canal 2; at the same time, the centrifugal pump 20 is started, and the centrifugal pump 20 sucks water from the canal 2 into the water outlet pipe 22, and finally sprays it out from the spray gun 4. The water sprayed from the spray gun 4 is sprayed onto the ground, thereby realizing the irrigation of farmland; in this process, the bottom valve 8 and the protective cover 9 filter the water; the pressure sensor 23, the flow sensor 24, the liquid level sensor 14 and the main controller U1 together ensure the stability of the working process.

[0063] This system is applied to a field planted with corn, which has an area of ​​300 mu, 500m long and 400m wide. A canal 2 is built in the field, which passes through the middle of the field. When irrigation is needed, water is filled into the canal 2 from the well in the field. When the water depth in the canal 2 reaches 0.5m, the vehicle body 1 is moved to the canal 2 under the drive of the track 3. The electric push rod 15 drives the water inlet pipe 13 to descend and extend below the liquid surface, and the track 3 drives the vehicle body 1 to move. At the same time, the centrifugal pump 20 draws the water in the canal 2 into the water inlet pipe 13, and after coming out of the water outlet pipe 22, it enters the spray gun 4 and is finally sprayed out from the spray gun 4 and falls into the field. The spraying distance can reach 130m. The track 3 drives the vehicle body 1 to move along the canal 2, and the water drives the spray gun 4 to rotate, so as to achieve uniform irrigation of the field. This irrigation process simulates precipitation and can achieve better irrigation effect. At the same time, this irrigation system is also relatively simple when it is not needed later. It only needs to destroy the canal 2. Compared with the form of burying underground pipes, the maintenance cost is lower and it is more convenient.

[0064] Example 3. This example differs from Example 2 in that a camera 5 is further connected to the spray gun 4 and positioned toward the water outlet of the spray gun 4. As the spray gun 4 rotates during operation, the camera 5 also rotates, thereby collecting external image information. The camera 5 transmits the collected image information to the main controller, which then transmits the image information via the IoT card. In this example, the camera 5 is powered by a solar panel to prevent the camera 5's wires from becoming entangled when the spray gun 4 rotates.

[0065] Example 4. This example differs from Example 3 in that a diesel generator and a diesel engine are installed on the vehicle body 1. The diesel engine provides power to the centrifugal pump 20, and the diesel generator provides power to the travel motor. Furthermore, a power distribution cabinet 7 is embedded in the vehicle body 1. This cabinet houses a power adapter (model: LM1000-20B12). This power adapter converts 220V AC to 12V DC. Furthermore, the cabinet 7 houses a servo driver that drives the travel motor.

[0066] Example 5. The difference between this example and Examples 1, 2, 3, and 4 is that an emergency stop switch SB1 and a three-color indicator light are provided at the rear of the vehicle body 1. The emergency stop switch SB1 controls the emergency stop of the travel motor. When the emergency stop switch SB1 is pressed, the travel motor is powered off and cannot work. When the travel motor has power, the three-color indicator light is green. The user can check whether the power supply to the travel motor is normal by observing the indicator light.

[0067] The specific method is as follows: the travel motor includes a main circuit and a control circuit. The main circuit is connected to the main contacts of the contactor KM. The travel motor is connected to the power supply through the main contacts of the contactor KM; the coil of the contactor KM is connected to the control circuit.

[0068] like Figure 10 As shown, the control circuit includes a normally closed emergency stop switch SB1, a first end of the normally closed emergency stop switch SB1 is connected to a power supply, and a second end is connected to the coil of the contactor KM through a start button SB2.

[0069] The second end of the normally closed emergency stop switch SB1 is also connected in sequence to the first normally open auxiliary contact of the contactor KM and the start indicator light L4; the second end of the normally closed emergency stop switch SB1 is also connected in sequence to the first normally closed auxiliary contact of the contactor KM and the stop indicator light L1; the second end of the normally closed emergency stop switch SB1 is also connected in sequence to the second normally open auxiliary contact of the contactor KM and the three-color indicator light green light L2; the second end of the normally closed emergency stop switch SB1 is also connected in sequence to the second normally closed auxiliary contact of the contactor KM and the three-color indicator light red light L3.

[0070] The three-color indicator light is installed next to the emergency stop switch SB1.

[0071] In this way, under normal circumstances, the emergency stop switch SB1 is closed. After pressing the start button, the coil of the contactor KM can be energized, the travel motor moves, and the start indicator light L4 lights up; the three-color indicator light green light L2 is on; when the emergency stop switch SB1 is pressed, the coil of the contactor KM is de-energized, the travel motor stops running, the start indicator light L4 is not on, and the three-color indicator light red light L3 is on, so that the status of the travel motor can be judged according to the status of the light.

[0072] Example 6. The difference between this example and Examples 1, 2, 3, 4, and 5 is that a tool cabinet 6 is embedded in the vehicle body 1, and a cabinet door is provided on the tool cabinet 6. By providing the tool cabinet 6, users can place tools therein, thereby improving the convenience of using the vehicle body 1.

[0073] Example 7. The difference between this example and Example 1 is that an ultrasonic obstacle avoidance sensor (model AVG) is provided on the vehicle body 1. There are multiple ultrasonic obstacle avoidance sensors. In this example, the number of ultrasonic obstacle avoidance sensors is 8, 4 of which are evenly distributed on the front of the vehicle body 11 and 4 are evenly distributed on the rear of the vehicle body 1.

[0074] The ultrasonic obstacle avoidance sensor is used to collect obstacle information and transmit a signal to the main controller U1 when an obstacle is detected. The ultrasonic obstacle avoidance sensor communicates with the main controller U1 through the serial port.

[0075] When working, the ultrasonic obstacle avoidance sensor collects the distance to the obstacle and transmits the information to the main controller U1 through the serial port. The main controller U1 compares the received signal with the threshold. When the distance to the obstacle is close, it stops working or turns to achieve the purpose of obstacle avoidance.

[0076] The utility model discloses an irrigation system based on a water channel, through which farmland can be irrigated, the irrigation process is highly controllable, the irrigation efficiency is high, the irrigation effect is better, and it has the characteristics of water saving and uniform irrigation. At the same time, the system is easy to implement in large fields, has practical significance for accelerating the promotion of agricultural modernization, and is not affected by the height of plants.

Claims

1. A canal-based irrigation system, characterized by: It includes a canal and a vehicle body that moves on the canal, and a centrifugal pump, a spray gun, a water inlet pipe and a water outlet pipe are arranged on the vehicle body; the water inlet of the centrifugal pump is connected to the water inlet pipe, and the water inlet pipe rises and falls along the vertical direction on the vehicle body; the water outlet of the centrifugal pump is connected to the spray gun through the water outlet pipe; the bottom end of the water inlet pipe is connected to a bottom valve, wherein the bottom valve is a one-way valve, and a wrench is provided on the bottom valve, and the wrench can open the bottom valve in the reverse direction, and a filter is provided at the bottom end of the bottom valve, and a protective cover is provided on the outer cover of the bottom valve.

2. The canal-based irrigation system of claim 1, wherein: A diaphragm pump is also provided on the vehicle body, and a water outlet of the diaphragm pump is connected to a water inlet pipe.

3. The canal-based irrigation system of claim 2, wherein: A main controller is also provided on the vehicle body, and a pressure sensor, a flow sensor and a flow valve are connected to the water outlet pipe; the signal output ends of the pressure sensor and the flow sensor are connected to the main controller.

4. The canal-based irrigation system of claim 2, wherein: A liquid level sensor is connected to the water inlet pipe; The signal output end of the liquid level sensor is connected to the main controller.

5. The canal-based irrigation system of claim 3, wherein: An IoT card is connected to the main controller.

6. The canal-based irrigation system of claim 4, wherein: A crawler track and a travel motor are provided at the bottom of the vehicle body, and the crawler track drives the vehicle body to move on the canal through the travel motor.

7. The canal-based irrigation system of claim 6, wherein: A diesel generator and a power adapter are installed in the vehicle body, and the diesel generator supplies power to the travel motor and the power adapter; The power adapter supplies power to the main controller and diaphragm pump.

8. The canal-based irrigation system according to any one of claims 1 to 7, wherein: A mounting seat is provided at the bottom end of the water inlet pipe, and the bottom valve is installed on the water inlet pipe through the mounting seat.

9. The canal-based irrigation system of claim 8, wherein: The liquid level sensor is arranged on the mounting base, and the liquid level sensor transmits the collected liquid level information to the main controller.

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