Multi-water source water supply method and system and sprinkling method and system

Abstract

The present application relates to a kind of multi-source water supply method and system and sprinkling irrigation method and system, water supply method and system include the flow of frequency pump for underground water source and the flow of variable frequency pump for non-underground water source according to the maximum flow required for water supply Limit, according to the comparison of minimum water level and actual water level of each water source to determine the abundance, use minimum water level as limit under the condition of one or more water sources are abundant, use minimum water level and actual water level to obtain water shortage index under the condition that each water source is short of water, optimize the parallel water supply configuration of multiple water sources, reduce the use of underground water, and can be targeted for each water source to remove impurities to avoid the risk of blockage, sprinkling irrigation method and system according to irrigation demand and multi-source water supply flow configuration several parallel branch pipes are divided into several irrigation groups in turn sprinkling irrigation, nozzle valve can select different movement program according to the topography of sprinkling irrigation area to realize the dynamic pressure sprinkling irrigation of nozzle, effectively improve the intelligent irrigation efficiency, give consideration to sprinkling uniformity, system safety and agricultural water utilization.

Description

Technical Field

[0001] This invention belongs to the field of irrigation technology, specifically relating to a multi-source water supply method and system, and a sprinkler irrigation method and system. Background Technology

[0002] Compared to flood irrigation, sprinkler irrigation not only improves irrigation uniformity but also reduces surface runoff and deep seepage, effectively improving water accuracy and utilization, and saving water. However, due to differences in water resource distribution across regions and excessive exploitation of deep groundwater, the contradiction between water supply and demand is becoming increasingly prominent, and single-source irrigation can no longer meet the needs of agricultural production. Existing multi-source water supply methods and systems, such as the "Indoor Multi-Source Flexible Switching System and Method Based on Water Pressure Status" disclosed in patent CN105544646B, monitor the pressure of reclaimed water entering the house and the pressure of tap water entering the house using pressure sensors, and use an electric two-way regulating valve to switch between the two water sources based on the pressure conditions. Patent CN105444150A discloses "A Multi-Source Water Supply System" which controls the flow rate of each water source supply pipeline through a water pump and uses an intelligent controller to adjust the water pump, realizing closed-loop control between the actual flow rate monitored by the smart water meter and the given flow rate.

[0003] Its main drawback is that it mainly uses pressure or flow rate as the evaluation criteria for water source selection, which can realize the switching or synergistic application between different water sources. However, in multi-source irrigation, the water volume and usage priority of each water source are different. The system fails to select the appropriate water source for irrigation based on the abundance of each water source. At the same time, the use of parallel water supply by industrial frequency pumps affects the efficient allocation of water resources, especially the overuse of groundwater sources.

[0004] Secondly, the lack of treatment for impurities in the water source may cause blockages in the water supply pipes during water supply. Alternatively, centralized treatment may be necessary, but due to the different types of impurities in each water source (e.g., well water contains silt and sand, while pond tailwater contains organic matter such as aquatic plants), the treatment efficiency and effectiveness are poor, and there is still a risk of blockages in the water supply and irrigation pipes.

[0005] Furthermore, most existing irrigation areas employ constant pressure sprinkler irrigation, with dynamic pressure sprinkler irrigation being less common. The studies "Research on the Distribution Characteristics and Uniformity of Water Volume in Dynamic Water Pressure Slope Sprinkler Irrigation" and "Calculation Method for Water Volume Distribution in Dynamic Water Pressure Slope Sprinkler Irrigation" discuss how periodic changes in sprinkler head working pressure can improve the energy distribution of sprinkler droplets, thus playing a positive role in enhancing the uniformity of sprinkler water volume distribution. However, most scholars achieve periodic changes in water supply pressure by adjusting pump speed and transmitting the pressure to the sprinkler inlet through pipelines. This also leads to periodic changes in the pressure of the fluid within the pipeline. The article "Calculation and Analysis of Pressure Pulsation in Transmission Pipelines" states that pressure pulsation is the main cause of vibration in pipelines and accessories. Vibration in the pipeline system can cause minor media leakage or, in severe cases, pipeline rupture, endangering personnel and system safety. Therefore, dynamic pressure sprinkler irrigation should not use pump speed adjustment to achieve periodic changes in sprinkler head working pressure. Additionally, the use of parallel irrigation pipelines with continuous operation during irrigation periods, without configuring irrigation pipelines according to irrigation needs and the flow rates of multiple water sources, affects irrigation efficiency and water utilization. Summary of the Invention

[0006] The present invention aims to at least partially solve one of the above-mentioned technical problems. The present invention provides a multi-source water supply method and system and a sprinkler irrigation method and system, which optimizes the water supply and irrigation configuration of multiple water sources, reduces the use of groundwater and the risk of pipeline blockage, improves the efficiency of intelligent irrigation, and takes into account the uniformity of sprinkler irrigation, system safety and the utilization rate of agricultural water.

[0007] The technical solution adopted by this invention to solve its technical problem is:

[0008] A multi-source water supply method, the method comprising:

[0009] Obtain the maximum flow rate Q required for water supply max When n1 groundwater sources are supplied with power frequency pumps and n2 non-groundwater sources are supplied with variable frequency pumps in parallel, the following conditions must be met: In the above formula, Q 定 Q is the rated flow rate of the power frequency pump. 1变 Q is the minimum flow rate required for the variable frequency pump to operate in its high-efficiency range. 2变 This represents the maximum flow rate of the variable frequency pump operating in its high-efficiency range.

[0010] Set the minimum water level h of the i-th water source. i Obtain its actual water level h′ i ;

[0011] When all water sources exist h i <h′ i At that time, press h i <h′ i To activate the i-th water source, press h. i ≥h′i Stop supplying water to the i-th water source at the specified time;

[0012] When all water sources h i ≥h′ i At that time, calculate all water sources Enable min(k) i Water will be supplied from the designated water source, and water from other sources will be stopped.

[0013] Furthermore, impurities from each water source are treated separately before being connected in parallel for water supply.

[0014] A multi-source water supply system includes at least one underground water source pipeline, at least one non-underground water source pipeline, a water supply pipeline, and a monitoring system. The underground water source pipeline is equipped with a power frequency pump, and the non-underground water source pipeline is equipped with a variable frequency pump. The underground water source pipeline and the non-underground water source pipeline are connected in parallel to the water supply pipeline.

[0015] The monitoring system includes a liquid level sensor and a controller. The liquid level sensor is used to monitor the water level information of the underground water source pipeline or the corresponding water source of the non-underground water source pipeline. The controller is used to acquire the water level information of the liquid level sensor and, based on the above-mentioned multi-source water supply method, control the opening and closing of the non-underground water source pipeline or the connection between the non-underground water source pipeline and the water supply pipeline, and control the opening and closing of the power frequency pump and the variable frequency pump.

[0016] Furthermore, the underground water source pipeline includes a well pipeline. Along the well pipeline inlet towards the water supply pipeline, a power frequency pump, a first butterfly valve, a first check valve, a first safety valve, and a centrifugal filter are sequentially installed on the well pipeline. The power frequency pump is a submersible pump.

[0017] Furthermore, the non-underground water source pipeline includes a pond pipeline. Along the inlet of the pond pipeline towards the water supply pipeline, the pond pipeline is sequentially equipped with a bottom valve, a variable frequency pump, a second butterfly valve, a second check valve, a second safety valve, and a sand and gravel filter. The variable frequency pump is a centrifugal pump.

[0018] A multi-source sprinkler irrigation method, the method comprising:

[0019] Based on the above multi-source water supply method, when controlling the water supply from the corresponding water source to the sprinkler irrigation network system, the water supply flow rate Q is obtained. 输 The number of parallel branch pipes n in the sprinkler irrigation network system 支总 The flow rate q of a single nozzle on each branch pipe under working pressure; the number of nozzles t on each branch pipe;

[0020] Press Q 输 / qt rounds down to determine the number n of branch pipes that can irrigate simultaneously. 支 Press n 支总 / n 支The parallel branch pipes are divided into several irrigation groups by rounding up to the nearest whole number. The irrigation groups then spray water onto the sprinkler area in sequence.

[0021] Furthermore, the methods include:

[0022] Set the lower limit of soil moisture s 下 and allowed upper limit s 上 To obtain the real-time soil moisture in the sprinkler irrigation area. 采 ;

[0023] If s 采 下 Then, based on controlling the corresponding water source to supply water to the sprinkler irrigation network system, if s 采 >s 上 If the water supply is interrupted, the water supply will be stopped.

[0024] Furthermore, the method includes: each branch pipe is equipped with several electric valves for controlling the opening and closing of each sprinkler head; when the irrigation area is a plain, the electric valve controls the movement angle of its stepper motor according to a 0-1 motion program.

[0025] Furthermore, the method includes: each branch pipe is equipped with several electric valves for controlling the opening and closing of each sprinkler head; when the irrigation area is a mountainous or hilly area, the electric valve controls the movement angle of its stepper motor according to a sine wave motion program, a square wave motion program, a triangular wave motion program, a sawtooth wave motion program, or a trapezoidal wave motion program, while adjacent electric valves on the same branch pipe are staggered by half a motion cycle.

[0026] A multi-source sprinkler irrigation system includes the aforementioned multi-source water supply system and at least one primary sprinkler network system. The sprinkler network system includes a water supply pipeline and several branch pipes. The water supply pipeline is connected to the water supply pipeline, and the several branch pipes are connected in parallel on the water supply pipeline. Several sprinklers are provided on the branch pipes in parallel.

[0027] The monitoring system includes a flow meter, a pressure transmitter, several branch valves and nozzle valves connected to the controller. The flow meter is used to collect the water supply flow rate, the pressure transmitter is used to collect the output pressure of the water supply pipeline, the several branch valves are used to open and close the connection between the water supply pipeline and each branch pipe, and the several nozzle valves are used to open and close the connection between the branch pipe and each nozzle.

[0028] The controller is used to acquire information from the flow meter and pressure transmitter, and based on the above-mentioned multi-source sprinkler irrigation method, to control the opening and closing of several branch pipe valves and sprinkler head valves.

[0029] ​Furthermore, the nozzle valve is a solar-powered electric valve, which includes a housing and a solar panel. The housing contains a circuit board, a stepper motor, a reduction mechanism, and a valve core. The housing includes a fluid channel. The circuit board is connected to the solar panel and the stepper motor respectively. The reduction mechanism is used to drive the valve core to rotate at a reduced speed. The output gear meshes with the pinion of the lowest-level double-layer gear. The valve core is used to rotate to open and close the fluid channel.

[0030] Furthermore, the reduction mechanism includes an input gear, several double-layer gears, and an output gear. The several double-layer gears are arranged in stages. The input gear is connected to a stepper motor and meshes with the large gear of the uppermost double-layer gear. The large gears of adjacent double-layer gears mesh with the small gears. The axle of the output gear is connected to the valve core.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] (1) A multi-source water supply method and system that fully considers the different water volumes and usage priorities of each water source can determine the water availability by comparing the minimum water level with the actual water level of each source. When one or more water sources are abundant, the minimum water level can be used as a limit to optimize the parallel water supply on / off configuration of multiple water sources. At the same time, when all water sources are short of water, the water shortage index k can be obtained by comparing the minimum water level with the actual water level. i , with min(k i By selecting a suitable water source and limiting the flow rate of the power frequency pumps used for groundwater sources and the variable frequency pumps used for non-groundwater sources according to the maximum flow rate required for water supply, the parallel water supply of groundwater sources and non-groundwater sources can operate efficiently and reduce the extraction of groundwater. This optimizes the configuration of multiple water sources, reduces the risk of irrigation failure due to water shortage of a single water source, and effectively alleviates the contradiction between water supply and demand.

[0033] (2) The multi-source water supply method and system can take corresponding removal and treatment measures according to the condition of impurities in each water source, reduce the possibility of pipe blockage, and further improve the stability of system operation.

[0034] (3) Multi-source sprinkler irrigation method and system: Under the optimized multi-source water supply configuration, the irrigation duration can be controlled according to the irrigation demand. Combined with the multi-source water supply flow configuration, several parallel branch pipes are divided into several irrigation groups for sequential sprinkler irrigation, which effectively improves the efficiency of intelligent irrigation and the utilization rate of water.

[0035] (4) Multi-source sprinkler irrigation methods and systems can select different motion programs according to the terrain of the irrigation area. Especially in mountainous and hilly areas, solar electric valves are used to adjust the working pressure of the sprinkler head to make it change periodically, adjust the spraying distance of the sprinkler head, increase the uniformity of irrigation, and realize dynamic pressure irrigation. Compared with the method of achieving dynamic pressure by adjusting the pump, the risk of pipeline leakage and rupture is reduced, and the uniformity of irrigation, system safety and agricultural water utilization are further taken into account. Attached Figure Description

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0037] Figure 1 This is a flowchart of Embodiment 1 of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0039] Figure 3 This is a flowchart of Embodiment 3 of the present invention;

[0040] Figure 4 This is a schematic diagram of the sprinkler irrigation network system structure of Embodiment 4 of the present invention;

[0041] Figure 5 This is a schematic diagram of the solar-powered electric valve structure according to Embodiment 4 of the present invention;

[0042] Figure 6 This is a schematic diagram of the monitoring system structure of Embodiment 4 of the present invention.

[0043] The diagram shows: well 111, first butterfly valve 112, submersible pump 113, first check valve 114, first safety valve 115, centrifugal filter 116, and well pipeline 117.

[0044] Pond 121, bottom valve 122, self-priming centrifugal pump 123, second butterfly valve 124, second check valve 125, second safety valve 126, sand and gravel filter 127, pond pipeline 128.

[0045] 13 Electric three-way valve, 14 Secondary filter, 15 Pressure transmitter, 16 Flow meter, 17 Water supply pipeline;

[0046] Branch valve 21, branch pipe 22, water supply pipeline 221, sprinkler head 24, riser 25;

[0047] Solar-powered electric valve 23, solar panel 2301, power output line of solar panel 23011, upper housing 2302, opening of upper housing 23021, lower housing 2303, circuit board 2304, control line of circuit board 23041, stepper motor 2305, output shaft of stepper motor 23051, upper gear plate 2306, lower gear plate 2307, input gear 2308, input gear hole 23081, first double-layer gear 2309, large gear of first double-layer gear 23091. The components are: small gear 23092 of the first double-layer gear, second double-layer gear 2310, large gear 23101 of the second double-layer gear, small gear 23102 of the second double-layer gear, output gear 2311, output shaft 23111 of the output gear, connecting key 2312, one end of the connecting key 23121, the other end of the connecting key 23122, connecting plate 2313, ball valve core 2314, ball valve body 2315, screw 2316, first screw 2317, second screw 2318, third screw 2319;

[0048] Controller 31, first liquid level sensor 32, second liquid level sensor 33, soil moisture sensor 33. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0050] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] Example 1:

[0053] like Figure 1 The image shows a preferred embodiment of a multi-source water supply method according to the present invention. The method includes: obtaining the maximum flow rate Q required for water supply. max When n1 groundwater sources are supplied in parallel using power frequency pumps and n2 non-groundwater sources are supplied in parallel using variable frequency pumps, the variable frequency pumps will initially enter a period of low efficiency, affecting their efficiency. To ensure efficient operation of the parallel connection between groundwater and non-groundwater sources and reduce groundwater extraction, let Q... 定 Q is the rated flow rate of the power frequency pump. 1变 Q is the minimum flow rate required for the variable frequency pump to operate in its high-efficiency range. 2变 Q represents the maximum flow rate of the variable frequency pump operating in its high-efficiency range. 2变 Q 定 ;

[0054] The sum of the rated flow rate of the power frequency pump and the maximum flow rate of the variable frequency pump operating in its high-efficiency range should equal the maximum flow rate required for water supply, i.e., n1Q. 定 +n2Q 2变 =Q max ①;

[0055] From an extreme perspective, if the same variable frequency pump is used to supply water to both groundwater and non-groundwater sources simultaneously, the sum of the maximum flow rates of the variable frequency pumps operating in their high-efficiency zones should be greater than or equal to the maximum flow rate required by the system, i.e., (n1+n2)Q. 2变 ≥Q max From a limiting perspective, if both groundwater and non-groundwater sources use the same frequency pumps for simultaneous water supply, the sum of the pump flows will be less than or equal to the maximum flow rate required by the system, i.e., (n1+n2)Q. 定 ≤Q max Therefore, we can obtain (n1+n2)Q 定 ≤Q max ≤(n1+n2)Q 2变 ②;

[0056] When the water consumption exceeds n2Q 2变 At that time, the fixed frequency pump and the variable frequency pump are connected in parallel to supply water, and the flow rate provided by the variable frequency pump is at least n2Q. 2变-n1Q 定 ;

[0057] When n2Q 2变 -n1Q 定 <n2Q 1变 At this time, the variable frequency pump operates in the non-efficient region, therefore it should satisfy n2Q. 2变 -n1Q 定 ≥n2Q 1变 ③;

[0058] Therefore, the power frequency pump and the variable frequency pump should satisfy equations ①, ②, and ③ above. Combining these equations, we can obtain the result when the power frequency pump and the variable frequency pump are connected in parallel:

[0059] satisfy

[0060] Since the water sources have different abundance and priorities, the minimum water level h of the i-th water source among the n1+n2 water sources can be set according to the priority. i Obtain its actual water level h′ i ;

[0061] When all water sources exist h i <h′ i At that time, press h i <h′ i To activate the i-th water source, press h. i ≥h′ i If the water supply from the i-th water source is stopped, the minimum water level can be used as a limit to optimize the configuration of multiple water sources.

[0062] When all water sources h i ≥h′ i At that time, calculate all water sources Enable min(k) i If the water supply from the corresponding water source is cut off and other water sources are shut off, then the water shortage index k can be obtained using the lowest water level. i Prioritize water supply, avoid using water sources that are even more scarce, and optimize the allocation of multiple water sources.

[0063] Furthermore, impurities from each water source are treated separately before being supplied in parallel. By utilizing the targeted treatment of different water sources, the treatment efficiency and effectiveness are improved, and the risk of blockage in water supply and irrigation pipelines is reduced.

[0064] Example 2:

[0065] like Figure 2As shown, this is a preferred embodiment of a multi-source water supply system according to the present invention. The multi-source water supply system includes at least one underground water source pipeline, at least one non-underground water source pipeline, a water supply pipeline 17, and a monitoring system. The underground water source pipeline is equipped with a power frequency pump, and the non-underground water source pipeline is equipped with a variable frequency pump. The underground water source pipeline and the non-underground water source pipeline are connected in parallel on the water supply pipeline 17.

[0066] The monitoring system includes a liquid level sensor and a controller 31. The liquid level sensor is used to monitor the water level information of the underground water source pipeline or the corresponding water source of the non-underground water source pipeline. The controller 31 is used to acquire the water level information of the liquid level sensor and, based on the multi-source water supply method described in Embodiment 1, control the connection and opening / closing of the non-underground water source pipeline or the non-underground water source pipeline and the water supply pipeline 17, and control the opening / closing of the power frequency pump and the variable frequency pump.

[0067] Furthermore, the underground water supply pipeline includes a well pipeline 117. Along the inlet of the well pipeline 117 towards the water supply pipeline 17, a power frequency pump, a first butterfly valve 112, a first check valve 114, a first safety valve 115, and a centrifugal filter 116 are sequentially installed on the well pipeline 117, connected in series via pipes and fittings. The power frequency pump is a submersible pump 113. The well pipeline 117 extends into the well 111, and the submersible pump 113 is located inside the well 111. The first butterfly valve... Valve 112 is mainly used for backup manual shut-off of water supply from well pipeline 117. First check valve 114 prevents water hammer from damaging submersible pump 113. First safety valve 115 is used to prevent water supply pressure from well 111 from exceeding the safe value. Centrifugal filter 116 is used to filter mud and sand from the water source of well 111. The outlet of centrifugal filter 116 is the outlet of well pipeline 117. This outlet is connected to the inlet of electric three-way valve 13 so as to safely utilize the water source of well 111.

[0068] Furthermore, the non-underground water source pipeline includes a pond pipeline 128. Along the inlet of the pond pipeline 128 towards the water supply pipeline 17, the pond pipeline 128 is sequentially equipped with a bottom valve 122, a variable frequency pump, a second butterfly valve 124, a second check valve 125, a second safety valve 126, and a sand filter 127, connected in series via pipes and fittings. The variable frequency pump is a self-priming centrifugal pump 123. The pond pipeline 128 extends into the pond 121, and the bottom valve 122 is located inside the pond 121. The function of the bottom valve 122 is to ensure that the water inside the pond pipeline 128 is safe when it draws water. The pond 121 is filled with liquid to facilitate pump startup. The second butterfly valve 124 is mainly used for manual shut-off of the pond pipeline 128 water supply. The second check valve 125 prevents water hammer from damaging the self-priming centrifugal pump 123. The second safety valve 126 prevents the pressure in the pond pipeline 128 from exceeding the safe value. The sand filter 127 is used to filter out colloids, iron, organic matter, etc. that may be contained in the water source of the pond 121. The outlet of the sand filter 127 is the outlet of the pond pipeline 128, which is connected to the inlet of the electric three-way valve 13 to safely utilize the water source of the pond 121.

[0069] The water supply methods of the above-mentioned multi-source water supply system include:

[0070] Well pipeline 117 and pond pipeline 128 are connected in parallel to water supply pipeline 17 via electric three-way valve 13. To ensure efficient operation of the multi-source water supply system and reduce groundwater extraction when well pipeline 117 and pond pipeline 128 are connected in parallel, a small-scale industrial frequency pump is selected for submersible pump 113, and a large-scale variable frequency pump is selected for self-priming centrifugal pump 123. Therefore, 2Q 定 ≤Q max ≤2Q 2变 -Q 1变 And Q 2变 Q 定 In the above formula, Q max The maximum flow rate Q required by the system max Q 定 Q is the rated flow rate of the industrial frequency small pump. 1变 Q is the minimum flow rate required for the variable frequency pump to operate in its high-efficiency range. 2变 This represents the maximum flow rate of the variable frequency pump operating in its high-efficiency range.

[0071] Based on the crop growth requirements and irrigated area, the monitoring system can be set to use a minimum water level of h for irrigation from a well. 机 The monitoring system can be set to use the lowest water level of pond 121 for irrigation as h. 池 The water level collected by the first liquid level sensor 32 in well 111 is h1, and the water level collected by the second liquid level sensor 33 in pond 121 is h2.

[0072] If h1>h 机 And h2 <h 池, the control unit will connect the well pipeline 117 to the water supply pipeline 17 for water supply;

[0073] If h1 < h 机 and h2 > h 池 , the control unit will connect the pond pipeline 128 to the water supply pipeline 17 for water supply;

[0074] If h1 > h 机 and h2 > h 池 , the control unit will connect both the well pipeline 117 and the pond pipeline 128 to the water supply pipeline 17 for joint irrigation operation;

[0075] If h1 < h 机 and h2 < h 池 , then calculate Further compare the water shortage coefficient k1 of the well 111 with the water shortage coefficient k2 of the pond 121. If k1 > k2, it means the well 111 is more water - short, then the control unit will connect the pond pipeline 128 to the water supply pipeline 17 for water supply. If k1 < k2, it means the pond 121 is more water - short, then the control unit will connect the well pipeline 117 to the water supply pipeline 17 for water supply.

[0076] The monitoring system determines whether to use the well pipeline 117 for single - water supply, or the pond pipeline 128 for single - water supply, or use both the well pipeline 117 and the pond pipeline 128 for joint water supply based on the water levels in the well 111 and the pond 121, avoiding using a more water - short water source and optimizing the configuration of the parallel water supply of the water source of the well 111 and the water source of the pond 121.

[0077] Embodiment 3:

[0078] As Figure 3 shown, it is a preferred embodiment of the multi - water - source sprinkler irrigation method described in the present invention, and its method includes:

[0079] Based on the multi - water - source water supply method described in Embodiment 1, when controlling the multi - water - source water supply system described in Embodiment 2 to supply water from the corresponding water source to the sprinkler irrigation pipe network system, obtain the water supply flow rate Q 输 ;

[0080] If the well pipeline 117 is used for water supply and the flow rate of the submersible pump 113 operating efficiently at power frequency is Q 定 , then the system output flow rate, that is, the water supply flow rate Q 输 = Q 定 ; If the pond pipeline 128 is used for water supply and the flow rate of the self - priming centrifugal pump 123 operating efficiently at a certain frequency is Q 变 , then the system output flow rate, that is, the water supply flow rate Q 输 = Q 变 ; If both the well pipeline 117 and the pond pipeline 128 are used for joint water supply, then the system output flow rate, that is, the water supply flow rate Q 输=Q 定 +Q 变 ;

[0081] Obtain the number n of parallel branch pipes in the sprinkler irrigation network system. 支总 The flow rate q of a single nozzle 24 on each branch pipe 22 under working pressure; the number t of nozzles 24 on each branch pipe 22;

[0082] Based on this, the monitoring system calculates the number n of 24 nozzles that can be activated. 喷 =Q 输 Based on this, the monitoring system calculates the number of branch pipes (n) that can simultaneously provide irrigation (22 pipes). 支 =n 喷 / t rounds down; press n 支总 / n 支 Rounding up to the nearest integer as the group number divides the parallel branch pipes 22 into several irrigation groups. These irrigation groups then sequentially irrigate the sprinkler area. This approach optimizes the configuration of irrigation pipelines by combining the flow rates of multiple water sources with the optimized multi-source water supply configuration, thereby improving irrigation efficiency and water utilization.

[0083] Furthermore, the methods include:

[0084] Based on the needs of crop growth, set a lower limit for soil moisture (s). 下 and allowed upper limit s 上 To obtain the real-time soil moisture in the sprinkler irrigation area. 采 ;

[0085] If s 采 下 If irrigation is required, the corresponding water source will be controlled to supply water to the sprinkler irrigation network system.

[0086] If s 采 ≥s 下 Furthermore, if the multi-source water supply system is not activated, then irrigation is deemed unnecessary.

[0087] If s 采 >s 上 Furthermore, if a multi-source water supply system is activated, it will determine that irrigation is excessive and stop supplying water.

[0088] The aforementioned multi-source sprinkler irrigation method can control the irrigation duration based on the irrigation needs of the sprinkler irrigation area, further improving irrigation accuracy.

[0089] ​Furthermore, the method includes: each branch pipe 22 is equipped with several electric valves for controlling the opening and closing of each sprinkler head 24; when the irrigation area is a plain, the electric valve controls the movement angle of its stepper motor 2305 according to a 0-1 motion program. The electric valve is preferably an electric ball valve. The angle when the electric ball valve is closed is described as 0, and the angle when the electric ball valve is fully open is described as 1. The 0-1 motion program describes the relationship between the movement angle of the stepper motor 2305 and the change over time as follows:

[0090]

[0091] In the above formula, α represents the degree of opening, t0 represents the set time point for the electric ball valve to start / close, and t represents time. Its uniformity is relatively poor compared to the sinusoidal motion program, but it can meet the needs of applications in plain areas and is more energy-efficient.

[0092] Furthermore, the method includes: each branch pipe 22 is equipped with several electric valves for controlling the opening and closing of each sprinkler head 24; when the irrigation area is a mountainous or hilly area, the electric valves control the movement angle of their stepper motors 2305 according to a sine wave, square wave, triangular wave, sawtooth wave, or trapezoidal wave motion program, which can improve the prominent peak value of the sprinkler droplet distribution under constant pressure water supply conditions. The working pressure of the sprinkler head 24 is adjusted by the motion program to make it exhibit periodic changes, thereby improving the uniformity of irrigation. When the electric valves are set to a sine wave, square wave, triangular wave, sawtooth wave, or trapezoidal wave motion program, adjacent electric valves on the same branch pipe 22 cooperate in pairs, staggered by half a motion cycle, to counteract pressure pulsations in the pipeline. Compared with the method of adjusting the pump speed for dynamic pressure irrigation, this can avoid the problem of pipeline pressure pulsations caused by pump changes, reduce the risk of pipeline leakage and rupture, and improve system safety.

[0093] The sinusoidal motion program describes the relationship between the movement angle of the stepper motor 2305 and the change over time as follows:

[0094] α(t) = A0sin(ωt) + A0;

[0095] In the above formula, α represents the degree of opening of the electric ball valve, A0 represents the amplitude of opening of the electric ball valve, with a maximum of 1 / 2 and a minimum of 0, ω represents the angular velocity of the ball valve, and t represents time.

[0096] The square wave motion program describes the relationship between the movement angle of the stepper motor 2305 and the change in time as follows:

[0097]

[0098] In the above formula, α is the degree of opening of the electric ball valve, A0 is the amplitude of opening of the electric ball valve, the maximum is 1 / 2 and the minimum is 0, ω is the angular velocity of the electric ball valve, t is time, and n is the order of the harmonic. The larger n is, the more accurate the shape of the wave.

[0099] The triangular wave motion program describes the relationship between the movement angle of the stepper motor 2305 and the change in time as follows:

[0100]

[0101] In the above formula, α is the degree of opening of the electric ball valve, A0 is the amplitude of opening of the electric ball valve, the maximum is 1 / 2 and the minimum is 0, ω is the average angular velocity of the ball valve, t is time, and n is the order of the harmonics. The larger n is, the more accurate the shape of the wave.

[0102] The sawtooth wave motion program describes the relationship between the stepper motor 2305's motion angle and time as follows:

[0103]

[0104] In the above formula, α is the degree of opening of the electric ball valve, A0 is the amplitude of opening of the electric ball valve (maximum is 1, minimum is 0), ω is the average angular velocity of the electric ball valve, t is time, and n is the order of the harmonics. The larger n is, the more accurate the shape of the wave.

[0105] The trapezoidal wave motion program describes the relationship between the movement angle of the stepper motor 2305 and the change in time as follows:

[0106]

[0107] In the above formula, α is the degree of opening of the electric ball valve, A0 is the amplitude of the ball valve opening, with a maximum of 1 / 2 and a minimum of 0, ω is the average angular velocity of the ball valve movement, d is the duration of the slope segment of the trapezoidal wave movement, t is time, and n is the order of the harmonics. The larger n is, the more accurate the shape of the wave.

[0108] Example 4:

[0109] like Figure 4 As shown, this is a preferred embodiment of the multi-source sprinkler irrigation system of the present invention. The multi-source sprinkler irrigation system includes the multi-source water supply system described in Example 2 and at least one-level sprinkler network system. The sprinkler network system includes a water supply pipeline 221 and several branch pipes 22. The water supply pipeline 221 is connected to the water supply pipeline 17. Several branch pipes 22 are connected in parallel on the water supply pipeline 221. Several sprinkler heads 24 are provided on the branch pipes 22.

[0110] The monitoring system includes a flow meter 16, a pressure transmitter 15, several branch valves 21, and a nozzle valve connected to the controller 31. The flow meter 16 is used to collect the water supply flow rate, the pressure transmitter 15 is used to collect the output pressure of the water supply pipeline 17, and the several branch valves 21 are used to open and close the connection between the water supply pipeline 221 and each branch pipe 22. The branch valves 21 can be solenoid valves and are located at the beginning of each branch pipe 22. The several nozzle valves are used to open and close the connection between the branch pipe 22 and each nozzle 24. The branch pipe 22 can be provided with several risers 25. The nozzle valves and nozzles 24 are installed in series on the risers 25, and the nozzle valves are located upstream of the nozzles 24.

[0111] The controller 31 is used to acquire information from the flow meter 16 and the pressure transmitter 15. The control system formulates a sprinkler irrigation plan based on the selected water supply system and controls the opening and closing of several branch pipe valves 21 and sprinkler head valves.

[0112] Furthermore, a secondary filter 14 is provided on the water supply pipeline 17, and a pressure transmitter 15 is installed between the flow meter 16 and the secondary filter 14 for further filtration to prevent irrigation blockage.

[0113] Furthermore, the monitoring system includes a soil moisture sensor 33 connected to the controller 31. The soil moisture sensor 33 is buried in the sprinkler irrigation area, and the soil moisture collected by the soil sensor is s. 采 This allows the monitoring system to determine whether irrigation is needed based on soil moisture information.

[0114] Furthermore, the nozzle valve is a solar-powered electric valve 23, which includes a housing and a solar panel 2301. The housing contains a circuit board 2304, a stepper motor 2305, a reduction mechanism, and a valve core. The housing includes a fluid channel. The circuit board 2304 is connected to the solar panel 2301 and the stepper motor 2305. The reduction mechanism is used to drive the valve core to rotate at a reduced speed. The output gear 2311 meshes with the pinion of the lowest-level double-layer gear. The valve core is used to rotate to open and close the fluid channel. The solar panel 2301 provides power to the stepper motor 2305 for energy saving, and the valve core is controlled to rotate under the deceleration of the reduction mechanism.

[0115] Furthermore, the circuit board 2304 includes an Internet of Things (IoT) module, a microcontroller module, and a stepper motor 2305 drive module. The IoT module enables communication between the microcontroller module and the monitoring system. The microcontroller module outputs control commands to the stepper motor 2305 drive module, which drives the stepper motor 2305. The nozzle valve is a ball valve. The microcontroller has a built-in motion program that controls the movement angle of the stepper motor 2305, thereby controlling the opening of the ball valve in real time. The angle when the ball valve is closed is described as 0, and the angle when the ball valve is fully open is described as 1. The motion program includes six types of sub-motion programs: 0-1 motion program, sine wave motion program, square wave motion program, triangular wave motion program, sawtooth wave motion program, and trapezoidal wave motion program, which further facilitates remote communication and nozzle valve control.

[0116] Furthermore, the reduction mechanism includes an input gear 2308, a first double-layer gear 2309, a second double-layer gear 2310, and an output gear 2311. The input gear 2308 is connected to a stepper motor 2305, and the output shaft 23051 of the stepper motor is interference-fitted with the input gear hole 23081. The input gear 2308 meshes with the large gear 23091 of the first double-layer gear, and the small gear 23092 of the first double-layer gear meshes with the large gear 23101 of the second double-layer gear. 23102 meshes with output gear 2311. The output shaft 23111 of the output gear is interference-fitted with one end 23121 of the connecting key, and the other end 23122 of the connecting key is interference-fitted with the keyhole on the ball valve core 2314. The axle of the output gear 2311 is connected to the valve core. After the stepper motor 2305 drives the input gear 2308 to rotate, the valve core is driven to rotate through the sequential deceleration transmission of the first double-layer gear 2309, the second double-layer gear 2310 and the output gear 2311, further improving the running accuracy.

[0117] Furthermore, the housing includes a detachably connected upper housing 2302 and lower housing 2303, which are connected by a first screw 2317. A solar panel 2301 is fixed to the outside of the upper housing 2302. The power output line 23011 of the solar panel is connected to a circuit board 2304 through an opening 23021 in the upper housing. The circuit board 2304 is fixed inside the upper housing 2302 by screws 2316. The control line 23041 of the circuit board is connected to a stepper motor. The lower housing 2303 is connected by a gear upper plate 2306 with an interference fit and a connecting plate 2313 connected by a second screw 2318. The stepper motor 2305 is fixed on the gear upper plate 2306. The lower housing 2303 is also provided with a gear lower plate 2307 with an interference fit. The valve core is a ball valve core 2314, and the fluid passage is the passage of the ball valve body 2315. The connecting plate 2313 is connected to the ball valve body 2315 by a third screw 2319, which further facilitates detachable assembly.

[0118] The irrigation methods for the above-mentioned multi-source sprinkler irrigation system include:

[0119] The water level information in the well 111 is collected by the first liquid level sensor 32 located in the well 111, and the water level information in the pond 121 is collected by the second liquid level sensor 33 located in the pond 121; the soil moisture information is collected by the soil moisture sensor 33 buried in the sprinkler irrigation area; the flow rate of the multi-source water supply system is collected by the flow meter 16 of the multi-source water supply system; and the output pressure of the multi-source water supply system is collected by the pressure transmitter 15 of the multi-source water supply system as the working pressure of the sprinkler head 24.

[0120] The monitoring system uses soil moisture information from soil moisture sensor 33 as data. 采 Set the lower limit of soil moisture s 下 and allowed upper limit s 上 Compare s according to the method of Example 3 采 s 下 and s 上 To determine the timing and duration of irrigation.

[0121] Based on the water levels in well 111 and pond 121, the monitoring system determines, according to the method in Example 2, whether to use well pipeline 117 for water supply alone, pond pipeline 121 for water supply alone, or well pipeline 117 and pond pipeline 128 for water supply together.

[0122] The monitoring system formulates a sprinkler irrigation plan according to the selected water supply pipeline 17 and the method of Example 3. Several parallel branch pipes 22 are divided into several irrigation groups, and the several irrigation groups spray irrigation on the sprinkler irrigation area in sequence.

[0123] The monitoring system selects the motion program of the solar electric valve 23 according to the terrain of the sprinkler area, and the controller 31 sends the information to the solar electric valve 23 for execution.

[0124] In summary, this invention allows for the selection of suitable water sources for irrigation based on the availability of each water source, reducing the use of groundwater and mitigating the risk of irrigation failure due to water shortages from a single source. Furthermore, this invention employs corresponding removal measures based on the impurities present in each water source, reducing the possibility of pipe blockage. The invention utilizes a solar-powered electric valve 23 to regulate the working pressure of the sprinkler head 24, causing it to change periodically to improve the uniformity of irrigation. Compared to adjusting the dynamic pressure via a pump, this reduces the risk of pipe leakage and rupture. The detailed descriptions listed above are merely specific illustrations of feasible embodiments of this invention and are not intended to limit the scope of protection of this invention. All equivalent embodiments or modifications made without departing from the spirit of this invention should be included within the scope of protection of this invention.

Claims

1. A multi-source water supply method, characterized in that, The methods include: Obtain the maximum flow rate Q required for water supply max When n1 groundwater sources are supplied with power frequency pumps and n2 non-groundwater sources are supplied with variable frequency pumps in parallel, the following conditions must be met: In the above formula, Q 定 Q is the rated flow rate of the power frequency pump. 1变 Q is the minimum flow rate required for the variable frequency pump to operate in its high-efficiency range. 2变 This represents the maximum flow rate of the variable frequency pump operating in its high-efficiency range. Set the minimum water level h of the i-th water source. i Obtain its actual water level h i '; When all water sources exist h i <h i 'When, press h i <h i 'When the i-th water source is activated, press h.' i ≥h i Stop supplying water to the i-th water source at the specified time. When all water sources h i ≥h i At that time, calculate the total water source. Enable min(k) i Water will be supplied from the designated water source, and water from other sources will be stopped.

2. The multi-source water supply method according to claim 1, characterized in that, First, the impurities of each water source are treated separately, and then the water is supplied in parallel.

3. A multi-source water supply system, characterized in that, It includes at least one underground water source pipeline, at least one non-underground water source pipeline, water supply pipeline (17), and a monitoring system. The underground water source pipeline is equipped with a power frequency pump, and the non-underground water source pipeline is equipped with a variable frequency pump. The underground water source pipeline and the non-underground water source pipeline are connected in parallel to the water supply pipeline (17). The monitoring system includes a liquid level sensor and a controller (31). The liquid level sensor is used to monitor the water level information of the underground water source pipeline or the corresponding water source of the non-underground water source pipeline. The controller (31) is used to acquire the water level information of the liquid level sensor and, based on the multi-source water supply method of claim 1, control the opening and closing of the non-underground water source pipeline or the non-underground water source pipeline and the water supply pipeline (17), and control the opening and closing of the power frequency pump and the variable frequency pump.

4. A multi-source water supply system according to claim 3, characterized in that, The underground water supply pipeline includes a well pipeline (117). Along the well pipeline (117) inlet toward the water supply pipeline (17), the well pipeline (117) is sequentially equipped with a power frequency pump, a first butterfly valve (112), a first check valve (114), a first safety valve (115), and a centrifugal filter (116). The power frequency pump is a submersible pump (113).

5. A multi-source water supply system according to claim 3, characterized in that, The non-underground water source pipeline includes a pond pipeline (128). Along the inlet of the pond pipeline (128) towards the water supply pipeline (17), the pond pipeline (128) is sequentially equipped with a bottom valve (122), a variable frequency pump, a second butterfly valve (124), a second check valve (125), a second safety valve (126), and a sand and gravel filter (127). The variable frequency pump is a centrifugal pump.

6. A multi-source sprinkler irrigation method, characterized in that, The methods include: Based on the multi-source water supply method of claim 1, when controlling the corresponding water source to supply water to the sprinkler irrigation network system, the water supply flow rate Q is obtained. 输 The number of parallel branch pipes (22) in the sprinkler irrigation network system is n. 支总 The flow rate q of a single nozzle (24) on each branch pipe (22) under working pressure; the number t of nozzles (24) on each branch pipe (22); Press Q 输 / qt rounds down to determine the number of branch pipes (22) that can irrigate simultaneously (n). 支 Press n 支总 / n 支 The parallel branch pipes (22) are divided into several irrigation groups by rounding up to the nearest whole number. The irrigation groups then spray water onto the sprinkler area in sequence.

7. A multi-source sprinkler irrigation method according to claim 6, characterized in that, The methods include: Set the lower limit of soil moisture s 下 and allowed upper limit s 上 To obtain the real-time soil moisture in the sprinkler irrigation area. 采 ; If s 采 下 Then, based on controlling the corresponding water source to supply water to the sprinkler irrigation network system, if s 采 >s 上 If the water supply is interrupted, the water supply will be stopped.​ 8. A multi-source sprinkler irrigation method according to claim 6, characterized in that, The method includes: each branch pipe (22) is equipped with several electric valves for controlling the opening and closing of each nozzle (24); When the irrigation area is a plain, the electric valve controls the movement angle of its stepper motor (2305) according to the 0-1 motion program; When the irrigation area is a mountainous or hilly area, the electric valve controls the movement angle of its stepper motor (2305) according to a sine wave motion program, square wave motion program, triangular wave motion program, sawtooth wave motion program or trapezoidal wave motion program, while adjacent electric valves on the same branch pipe are separated by half a motion cycle.

9. A multi-source sprinkler irrigation system, characterized in that, The system includes a multi-source water supply system as described in claim 3 and at least a primary sprinkler irrigation network system. The sprinkler irrigation network system includes a water supply pipeline (221) and several branch pipes (22). The water supply pipeline (221) is connected to the water supply pipeline (17). Several branch pipes (22) are connected in parallel on the water supply pipeline (221). Several sprinkler heads (24) are provided on the branch pipes (22). The monitoring system includes a flow meter (16), a pressure transmitter (15), several branch valves (21) and nozzle valves connected to the controller (31). The flow meter (16) is used to collect the water supply flow rate, the pressure transmitter (15) is used to collect the output pressure of the water supply pipeline (17), the several branch valves (21) are used to open and close the connection between the water supply pipeline (221) and each branch pipe (22), and the several nozzle valves are used to open and close the connection between the branch pipe (22) and each nozzle (24). The controller (31) is used to acquire information from the flow meter (16) and the pressure transmitter (15), and to control the opening and closing of several branch pipe valves (21) and sprinkler valves based on the multi-source sprinkler irrigation method described in claim 6.

10. A multi-source sprinkler irrigation system according to claim 9, characterized in that, The nozzle valve is a solar-powered electric valve (23). The solar-powered electric valve (23) includes a housing and a solar panel (2301). The housing contains a circuit board (2304), a stepper motor (2305), a reduction mechanism, and a valve core. The housing includes a fluid channel. The circuit board (2304) is connected to the solar panel (2301) and the stepper motor (2305) respectively. The reduction mechanism includes an input gear (2308), several double-layer gears, and an output gear (2311). The several double-layer gears are arranged in stages. The input gear (2308) is connected to the stepper motor (2305). The input gear (2308) meshes with the large gear of the uppermost double-layer gear. The large gears of the adjacent double-layer gears mesh with the small gears. The axle of the output gear (2311) is connected to the valve core. The output gear (2311) meshes with the small gear of the lowermost double-layer gear. The valve core is used to rotate to open and close the fluid channel.

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