Watering cart waterway system, control method and watering cart

Abstract

The invention relates to the technical field of watering carts, and provides a watering cart waterway system, a control method and a watering cart.The watering cart waterway system comprises a water tank, a water pump, an air pump, an air tank, a pressure control valve, a Venturi tube, a spraying assembly and a control device, the Venturi tube is provided with a contraction section, a throat tube and a diffusion section, and the spraying assembly is connected with the diffusion section; a water inlet of the water pump is connected with the water tank, and a water outlet of the water pump is connected with the contraction section; the gas tank is suitable for buffering gas, a gas inlet of the gas pump is communicated with the atmosphere, a gas outlet of the gas pump and the throat pipe are both connected with the gas tank, and the pressure control valve is arranged between the throat pipe and the gas tank and is suitable for controlling the pressure of the gas entering the throat pipe; the water pump and the pressure control valve are electrically connected with the control device. The control device is suitable for controlling the rotating speed of the water pump and the output pressure of the pressure control valve. By means of the arrangement, the air-water mixture is provided for the spraying assembly, and on the premise of the same spraying width, the water consumption can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sprinkler trucks, and in particular to a sprinkler truck waterway system, a control method and a sprinkler truck. Background Art

[0002] A sprinkler truck is a special vehicle used for urban road cleaning, landscaping irrigation, and in some cases, for dust control or emergency firefighting. At present, sprinkler trucks generally use a sprinkler pump, which is directly controlled by a water valve to spray water from each nozzle to wash or reduce dust on the ground. The width and effect of the washing operation are guaranteed by controlling the water pressure and water volume. For a larger width of the washing operation, a larger water pressure and water volume are required, and the amount of water sprayed is very large, which not only wastes resources, but also causes varying degrees of water accumulation on the ground due to excessive water sprayed on the ground. Vehicles often get more stains when passing by, and even in winter, the water on the road freezes, posing a traffic hazard.

[0003] Therefore, how to solve the problem of large water consumption caused by the sprinkler truck in the prior art to ensure the width of the flushing operation has become an important technical problem to be solved by those skilled in the art. Summary of the invention

[0004] The invention provides a water channel system of a sprinkler truck, a control method and a sprinkler truck, which are used to solve the defect of a sprinkler truck in the prior art that a large amount of water is used to ensure a flushing operation width.

[0005] The present invention provides a water system of a sprinkler truck, comprising a water tank, a water pump, an air pump, an air tank, a pressure control valve, a venturi tube, a spray assembly and a control device, wherein the venturi tube has a contraction section, a throat and a diffusion section, and the spray assembly is connected to the diffusion section; The water tank is suitable for storing water, the water inlet of the water pump is connected to the water tank, and the water outlet of the water pump is connected to the contraction section; The gas tank is suitable for caching gas, the air inlet of the air pump is connected to the atmosphere, the air outlet of the air pump and the throat are both connected to the gas tank, the pressure control valve is arranged between the throat and the gas tank, and the pressure control valve is suitable for controlling the pressure of the gas entering the throat; The water pump and the pressure control valve are both electrically connected to the control device, and the control device is suitable for controlling the rotation speed of the water pump and the output pressure of the pressure control valve.

[0006] A water system for a sprinkler truck according to the present invention further includes a first one-way valve and / or a second one-way valve; The first one-way valve is disposed between the water pump and the contraction section, and the first one-way valve is adapted to only allow water to flow from the water pump to the contraction section; The second one-way valve is disposed between the air pump and the air tank, and the second one-way valve is adapted to only allow gas to flow from the air pump to the air tank.

[0007] According to a water system for a sprinkler truck provided by the present invention, the pressure control valve is a proportional pressure reducing valve.

[0008] According to a water system of a sprinkler truck provided by the present invention, the spray assembly includes a nozzle, a connecting pipeline and a control valve; At least two nozzles are provided, each nozzle is provided with a corresponding connecting pipeline, and the connecting pipeline is provided between the nozzle and the diffuser section; The control valve is arranged on the connecting pipeline, and one control valve is arranged corresponding to each connecting pipeline. The control valve is suitable for controlling the on-off of the connecting pipeline, and the control valve is electrically connected to the control device.

[0009] A water channel system for a sprinkler truck provided according to the present invention further includes a pressure detection element, which is arranged in the contraction section. The pressure detection element is suitable for detecting the pressure value at the contraction section, and the pressure detection element is electrically connected to the control device.

[0010] The present invention also provides a method for controlling a water channel system of a sprinkler truck, wherein the water channel system of the sprinkler truck is the above-mentioned water channel system of the sprinkler truck, and the method for controlling the water channel system of the sprinkler truck comprises: Get the target working mode of the sprinkler truck; Determining a target rotation speed and a target water flow rate of the water pump according to a target operating mode of the sprinkler truck; Acquiring environmental parameters, wherein the environmental parameters include environmental temperature and environmental humidity; Determining a target gas flow rate according to the ambient humidity and the target water flow rate; Obtain the pressure value at the contraction section of the Venturi tube; Determining a target output pressure of the pressure control valve according to the target gas flow rate, the ambient temperature and the pressure value at the contraction section of the venturi tube; According to the target output pressure, a target input current of the pressure control valve is determined.

[0011] According to a control method for a water system of a sprinkler truck provided by the present invention, the target speed and target water flow rate of a water pump are determined according to the target working mode of the sprinkler truck, including: Determine the target speed of the water pump corresponding to the target working mode of the water truck according to the preset corresponding relationship between each working mode of the water truck and the speed of the water pump; According to the preset corresponding relationship between the water flow rate and the rotation speed of the water pump, a target water flow rate corresponding to the target rotation speed of the water pump is determined.

[0012] According to a control method for a water system of a sprinkler truck provided by the present invention, the target gas flow rate is determined according to the ambient humidity and the target water flow rate, comprising: Determining the gas mixing ratio corresponding to the ambient humidity according to the preset corresponding relationship between the ambient humidity and the gas mixing ratio; A target gas flow rate corresponding to the target water flow rate is determined according to a calculation model of the gas mixing ratio and the target water flow rate.

[0013] According to a control method for a water system of a sprinkler truck provided by the present invention, determining a target input current of the pressure control valve according to the target output pressure comprises: According to a preset corresponding relationship between the output pressure and the input current of the pressure control valve, a target input current corresponding to the target output pressure is determined.

[0014] The present invention further provides a sprinkler truck, comprising the above-mentioned sprinkler truck water system, or comprising a control device, wherein the control device can execute the above-mentioned control method of the sprinkler truck water system.

[0015] The water system of a water sprinkler provided by the present invention comprises a water tank, a water pump, an air pump, an air tank, a pressure control valve, a venturi tube, a spray assembly and a control device, wherein the venturi tube has a contraction section, a throat and a diffusion section, and the spray assembly is connected to the diffusion section. The water tank is used to store water, the water inlet of the water pump is connected to the water tank, the water outlet of the water pump is connected to the contraction section, and when the water pump is running, water can be supplied to the contraction section of the venturi tube. The air tank is used to buffer gas, the air inlet of the air pump is connected to the atmosphere, the air outlet and the throat of the air pump are both connected to the air tank, and when the air pump is running, gas can be transported into the air tank so that gas of a certain pressure is stored in the air tank. The pressure control valve is arranged between the throat and the air tank, and the pressure control valve is used to control the pressure of the gas entering the throat, and the gas in the gas tank can flow to the throat of the venturi tube through the pressure control valve to mix with the water phase of the contraction section of the venturi tube, and flow to the diffusion section of the venturi tube together, and then spray out through the spray assembly. The water pump and the pressure control valve are both electrically connected to the control device, and the control device can control the rotation speed of the water pump and the output pressure of the pressure control valve. With this arrangement, it is possible to provide an air-water mixture to the spraying assembly, and under the premise of the same spraying width, it is possible to reduce the water consumption and achieve the purpose of water saving, thus solving the problem of large water consumption caused by the sprinkler truck in the prior art to ensure the width of the flushing operation. In addition, by controlling the rotation speed of the water pump and the output pressure of the pressure control valve, different spraying widths can be achieved to meet different spraying requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The present invention is a schematic diagram of the structure of the water system of the sprinkler truck.

[0018] Figure 2 It is a flow chart of the control method of the water system of the sprinkler truck provided by the present invention.

[0019] Reference numerals: 1. Water tank; 2. Water pump; 3. Air pump; 4. Air tank; 5. Pressure control valve; 6. Venturi tube; 7. First one-way valve; 8. Second one-way valve; 9. Nozzle; 10. Connecting pipeline; 11. Control valve; 12. First motor; 13. Second motor. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Combine the following Figure 1 The water channel system of a sprinkler truck of the present invention is described.

[0022] like Figure 1 As shown, the water system of a sprinkler truck provided in an embodiment of the present invention includes a water tank 1, a water pump 2, an air pump 3, an air tank 4, a pressure control valve 5, a venturi tube 6, a spraying assembly and a control device.

[0023] Specifically, the venturi tube 6 has a contraction section, a throat and a diffusion section, and the spray assembly is connected to the diffusion section.

[0024] The water tank 1 is used to store water. The water inlet of the water pump 2 is connected to the water tank 1 , and the water outlet of the water pump 2 is connected to the contraction section. When the water pump 2 is running, water can be supplied to the contraction section of the venturi tube 6 .

[0025] The gas tank 4 is used to buffer gas, the air inlet of the air pump 3 is connected to the atmosphere, the air outlet and the throat of the air pump 3 are connected to the gas tank 4, and when the air pump 3 is running, gas can be transported into the gas tank 4, so that gas with a certain pressure is stored in the gas tank 4.

[0026] The pressure control valve 5 is arranged between the throat and the gas tank 4. The pressure control valve 5 is used to control the pressure of the gas entering the throat. The gas in the gas tank 4 can flow to the throat of the venturi tube 6 through the pressure control valve 5 to mix with the water in the contraction section of the venturi tube 6, and flow to the diffusion section of the venturi tube 6 together, and then be sprayed out through the spray assembly.

[0027] The water pump 2 and the pressure control valve 5 are both electrically connected to the control device, and the control device can control the rotation speed of the water pump 2 and the output pressure of the pressure control valve 5 .

[0028] Such an arrangement realizes providing an air-water mixture to the spraying assembly, which can reduce water consumption under the premise of the same spraying width, achieve the purpose of water saving, and solve the problem of large water consumption caused by the sprinkler truck in the prior art to ensure the width of the flushing operation.

[0029] In addition, by controlling the rotation speed of the water pump 2 and the output pressure of the pressure control valve 5, different spraying widths can be achieved to meet different spraying requirements.

[0030] It should be noted that the water pump 2 is driven by a first motor 12 , and the air pump 3 is driven by a second motor 13 .

[0031] The cross-sectional area of ​​the inlet section of the contraction section of the venturi tube 6 is larger than the cross-sectional area of ​​the throat. When water flows from the contraction section of the venturi tube 6 to the throat, the pressure will drop from p1 to p2. The output pressure p of the pressure control valve 5 is controlled between p1 and p2, which can ensure that the gas can be mixed into the water flow and flow out from the diffusion section along the water flow direction of the venturi tube 6.

[0032] In the embodiment of the present invention, the water system of the sprinkler truck further includes a first one-way valve 7 and / or a second one-way valve 8 .

[0033] The first one-way valve 7 is arranged between the water pump 2 and the contraction section. The first one-way valve 7 only allows water to flow from the water pump 2 to the contraction section, which can prevent the water in the contraction section from flowing back to the water pump 2 to ensure the safe operation of the water pump 2.

[0034] The second one-way valve 8 is arranged between the air pump 3 and the gas tank 4. The second one-way valve 8 only allows gas to flow from the air pump 3 to the gas tank 4, which can prevent water in the gas tank 4 from flowing back to the air pump 3 to ensure the safe operation of the air pump 3.

[0035] In the embodiment of the present invention, a proportional pressure reducing valve is selected as the pressure control valve 5. By controlling the input current signal of the proportional pressure reducing valve, its output pressure can be accurately controlled, the control is precise, and the dynamic response is fast, and it has programmability and flexibility, which is conducive to improving the stability and reliability of the water system of the sprinkler truck.

[0036] In the embodiment of the present invention, the spray assembly includes a nozzle 9 , a connecting pipeline 10 and a control valve 11 .

[0037] At least two nozzles 9 are provided, and the nozzles 9 can be set at different positions to meet different working modes of the sprinkler truck, such as flushing cleaning, front flushing cleaning, rear sprinkling for dust reduction, water gun spraying, etc.

[0038] A connecting pipe 10 is correspondingly provided for each nozzle 9 , and the connecting pipe 10 is provided between the nozzle 9 and the diffusion section to connect each nozzle 9 to the diffusion section of the venturi tube 6 , so as to ensure that the gas-water mixture in the diffusion section of the venturi tube 6 can flow to any nozzle 9 .

[0039] The control valve 11 is arranged on the connecting pipeline 10, and each connecting pipeline 10 is provided with a corresponding control valve 11, and the control valve 11 is used to control the on-off of the connecting pipeline 10. According to the working mode of the sprinkler truck, the state of each control valve 11 can be controlled, and the corresponding nozzle 9 can be selected as needed for spraying operation.

[0040] The control valve 11 is electrically connected to the control device to realize automatic control of the control valve 11, thereby realizing automatic control of the water system of the sprinkler truck.

[0041] In the embodiment of the present invention, the water system of the sprinkler truck further includes a pressure detection element, and the pressure detection element is electrically connected to the control device.

[0042] The pressure detection element is arranged at the contraction section of the Venturi tube 6 , and the pressure detection element is used to detect the pressure value at the contraction section of the Venturi tube 6 .

[0043] According to the structural parameters of the Venturi tube 6 and the pressure value at the contraction section of the Venturi tube 6, the pressure value at the throat of the Venturi tube 6 can be determined, and then the target output pressure of the pressure control valve 5 can be determined by calculation to control the pressure control valve 5.

[0044] The pressure detection element may be, but is not limited to, a pressure sensor.

[0045] In summary, the water system of the water sprinkler provided in the embodiment of the present invention uses the venturi tube 6 to mix water and gas, and can easily realize the nozzle 9 to spray uniform water mist, which has a good effect on flushing the road surface. The combination of the water pump 2 and the air pump 3 can ensure that the output pressure of the nozzle 9 is large enough while saving water by mixing water and gas, so that the road surface can be flushed more cleanly.

[0046] On the other hand, the present invention also provides a control method for a sprinkler waterway system based on the sprinkler waterway system provided by any of the above embodiments. The control method for a sprinkler waterway system described below can correspond to the sprinkler waterway system described above.

[0047] like Figure 2 As shown, the control method of the water system of a sprinkler truck provided in the embodiment of the present invention includes steps 110 to 170.

[0048] Step 110: Obtain the target working mode of the sprinkler truck.

[0049] The working modes of the sprinkler truck include counter-washing, front-washing, rear-sprinkling for dust reduction, water gun spraying, etc. The different working modes of the sprinkler truck require different spraying widths. For example, the spraying width for counter-washing needs to be greater than or equal to 24 meters, the spraying width for front-washing needs to be greater than or equal to 8 meters, the spraying width for rear-sprinkling for dust reduction needs to be greater than or equal to 14 meters, and the spraying distance for water gun spraying needs to be greater than or equal to 38 meters.

[0050] Therefore, the control process of the water system of the sprinkler truck needs to be carried out according to the target working mode of the sprinkler truck.

[0051] Step 120: Determine the target rotation speed and target water flow rate of the water pump according to the target operating mode of the sprinkler truck.

[0052] The working modes of sprinkler trucks are different, and the required spraying width or spraying distance is different, and accordingly, the required water flow rate is also different.

[0053] In this embodiment, the rotation speed and water flow rate of the water pump 2 are set respectively for different working modes. The target working modes of the watering truck are different, and the corresponding target rotation speed and target water flow rate of the water pump 2 are also different.

[0054] In a specific embodiment, the corresponding relationship between each working mode of the sprinkler truck and the water pump speed, as well as the corresponding relationship between the water flow rate and the water pump speed can be preset.

[0055] After the target operating mode of the sprinkler truck is determined, the target speed of the water pump 2 can be directly determined according to the preset corresponding relationship between each operating mode of the sprinkler truck and the speed of the water pump.

[0056] After the target rotation speed of the water pump 2 is determined, the target water flow rate can be directly determined according to the preset corresponding relationship between the water flow rate and the rotation speed of the water pump.

[0057] The above-mentioned preset corresponding relationship between each working mode of the sprinkler truck and the water pump speed may be a mapping relationship between the working mode of the sprinkler truck and the water pump speed.

[0058] The water flow rate is proportional to the water pump speed. The above-mentioned preset corresponding relationship between the water flow rate and the water pump speed can be a calculation relationship between the water flow rate and the water pump speed.

[0059] Step 130: Acquire environmental parameters, which include ambient temperature and ambient humidity.

[0060] In the control method of the water system of the sprinkler truck, it is also necessary to obtain environmental parameters. The water system of the sprinkler truck can be controlled according to the specific conditions of the environment. This can make the sprinkler effect more in line with the actual environment and achieve water-saving effects while meeting the sprinkler requirements.

[0061] Specifically, a temperature and humidity sensor may be provided on the water sweeper, and the temperature and humidity sensor may be used to detect the ambient temperature and humidity.

[0062] Step 140: Determine the target gas flow rate according to the ambient humidity and the target water flow rate.

[0063] The humidity of the environment is different, and the required gas mixing ratio is different when the spraying width is constant. According to the humidity of the environment, the required gas mixing ratio is determined, and then combined with the target water flow rate, the target gas flow rate can be determined.

[0064] In a specific embodiment, the corresponding relationship between the ambient humidity and the gas mixing ratio, as well as the calculation model of the gas mixing ratio can be preset.

[0065] The ambient humidity is Φ, the gas mixing ratio is X, and the corresponding relationship between the ambient humidity and the gas mixing ratio is: .

[0066] The water flow rate in the gas-water mixture is f(n), the gas flow rate in the gas-water mixture is f(p), and the gas mixing ratio .

[0067] After the ambient humidity is determined, the required gas mixing ratio can be directly determined according to the preset corresponding relationship between the ambient humidity and the gas mixing ratio.

[0068] After the required gas mixing ratio and target water flow rate are determined, the target gas flow rate can be calculated based on a preset calculation model of the gas mixing ratio.

[0069] Step 150: Obtain the pressure value at the contraction section of the Venturi tube.

[0070] Specifically, a pressure sensor may be provided at the contraction section of the Venturi tube 6 , and the pressure value at the contraction section of the Venturi tube 6 may be directly detected by the pressure sensor.

[0071] Step 160: Determine the target output pressure of the pressure control valve according to the target gas flow rate, the ambient temperature and the pressure value at the contraction section of the venturi tube.

[0072] According to the fluid continuity equation and the Bernoulli equation, the pressure value at the throat of the Venturi tube 6 can be calculated.

[0073] Specifically, the cross-sectional area at the inlet of the contraction section of the Venturi tube 6 is A1, the water flow rate at the inlet of the contraction section of the Venturi tube 6 is V1, the cross-sectional area at the throat is A2, the water flow rate at the throat is V2, A1 is greater than A2, and according to the fluid continuity equation Q=V1A1=V2A2, therefore, V1 is less than V2.

[0074] Based on the above target water flow, V1 and V2 can be calculated and determined respectively. Combined with the Bernoulli equation , in which ρ is the density of water, p1 is the pressure value at the inlet of the contraction section of the Venturi tube 6, and p2 is the pressure value at the throat of the Venturi tube 6. According to the pressure value at the contraction section of the Venturi tube 6, the pressure value at the throat of the Venturi tube 6 can be calculated.

[0075] By referring to relevant textbooks and empirical formulas, the filling time of the gas with a volume of V into the Venturi tube 6 is , the gas flow rate of the gas filled into the venturi tube 6 , where V is the volume of gas filled into the Venturi tube 6, in cubic meters, t is the time for filling the gas into the Venturi tube 6, in seconds, p2 is the pressure value at the throat of the Venturi tube 6, in Pa, p is the output pressure of the pressure control valve 5, in Pa, A is the cross-sectional area of ​​the gas pipeline between the pressure control valve 5 and the throat of the Venturi tube 6, in square meters, and T0 is the thermodynamic temperature of the gas, in Kelvin.

[0076] After the structure of the water system of the sprinkler truck is determined, the cross-sectional area A of the gas pipeline between the pressure control valve 5 and the throat of the venturi tube 6 is determined. Therefore, the target output pressure of the pressure control valve 5 can be calculated based on the target gas flow, ambient temperature and the pressure value at the throat of the venturi tube 6.

[0077] Step 170: Determine the target input current of the pressure control valve according to the target output pressure.

[0078] For the pressure control valve 5 , different input currents result in different output pressures, and the input current and the output pressure have a corresponding relationship.

[0079] In a specific embodiment, the corresponding relationship between the output pressure and the input current of the pressure control valve 5 can be preset. After determining the target output pressure, the target input current corresponding to the target output pressure can be directly determined according to the preset corresponding relationship between the output pressure and the input current of the pressure control valve 5.

[0080] The above-mentioned preset corresponding relationship between the output pressure and the input current of the pressure control valve 5 may be a mapping relationship between the output pressure and the input current of the pressure control valve 5 .

[0081] To summarize, according to the target working mode and environmental parameters of the sprinkler truck, the target speed of the water pump 2 and the target input current of the pressure control valve 5 can be determined, and then the speed of the water pump 2 and the input current of the pressure control valve 5 can be controlled to achieve the ratio of the gas-water mixture provided to the spraying component. Under the premise of meeting the spraying width, the optimal ratio of water and gas is achieved, the water saving rate is maximized, the water consumption is reduced as much as possible, and the purpose of water saving is achieved.

[0082] The derivation process of the beneficial effects of the control method of the water channel system of a sprinkler truck in the embodiment of the present invention is generally similar to the derivation process of the beneficial effects of the water channel system of the sprinkler truck described above, so it will not be repeated here.

[0083] In addition, the control method of the water system of a sprinkler truck provided by the embodiment of the present invention can easily realize water-saving intelligent control, eliminate the need to determine the amount of mixed gas through human judgment, and is simple to operate.

[0084] On the other hand, an embodiment of the present invention further provides a sprinkler truck, including the sprinkler truck water circuit system provided by any of the above embodiments, or including a control device, the control device can execute the control method of the sprinkler truck water circuit system provided by any of the above embodiments. It has all the advantages of the above sprinkler truck water circuit system or the control method of the sprinkler truck water circuit system, which will not be repeated here. The derivation process of the beneficial effects of the sprinkler truck in the embodiment of the present invention is generally similar to the derivation process of the beneficial effects of the above sprinkler truck water circuit system or the control method of the sprinkler truck circuit system, so it will not be repeated here.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water system for a sprinkler truck, characterized in that: It comprises a water tank (1), a water pump (2), an air pump (3), an air tank (4), a pressure control valve (5), a venturi tube (6), a spray assembly and a control device, wherein the venturi tube (6) has a contraction section, a throat and a diffusion section, and the spray assembly is connected to the diffusion section; The water tank (1) is suitable for storing water, the water inlet of the water pump (2) is connected to the water tank (1), and the water outlet of the water pump (2) is connected to the contraction section; The gas tank (4) is suitable for buffering gas, the air inlet of the air pump (3) is connected to the atmosphere, the air outlet of the air pump (3) and the throat pipe are both connected to the gas tank (4), the pressure control valve (5) is arranged between the throat pipe and the gas tank (4), and the pressure control valve (5) is suitable for controlling the pressure of the gas entering the throat pipe; The water pump (2) and the pressure control valve (5) are both electrically connected to the control device, and the control device is suitable for controlling the rotation speed of the water pump (2) and the output pressure of the pressure control valve (5).

2. The water system of the sprinkler truck according to claim 1, characterized in that: It also includes a first one-way valve (7) and / or a second one-way valve (8); The first one-way valve (7) is arranged between the water pump (2) and the contraction section, and the first one-way valve (7) is suitable for only allowing water to flow from the water pump (2) to the contraction section; The second one-way valve (8) is arranged between the air pump (3) and the air tank (4), and the second one-way valve (8) is suitable for only allowing gas to flow from the air pump (3) to the air tank (4).

3. The water system of the sprinkler truck according to claim 1, characterized in that: The pressure control valve (5) is a proportional pressure reducing valve.

4. The waterway system of a sprinkler truck according to claim 1, characterized in that: The spraying assembly comprises a nozzle (9), a connecting pipeline (10) and a control valve (11); At least two nozzles (9) are provided, each nozzle (9) is provided with a corresponding connecting pipeline (10), and the connecting pipeline (10) is provided between the nozzle (9) and the diffuser section; The control valve (11) is arranged on the connecting pipeline (10), and one control valve (11) is arranged corresponding to each connecting pipeline (10). The control valve (11) is suitable for controlling the on-off of the connecting pipeline (10), and the control valve (11) is electrically connected to the control device.

5. The water system of the sprinkler truck according to claim 1, characterized in that: It also includes a pressure detection element, which is arranged in the contraction section. The pressure detection element is suitable for detecting the pressure value at the contraction section, and the pressure detection element is electrically connected to the control device.

6. A method for controlling a water system of a sprinkler truck, characterized in that: The water channel system of the sprinkler truck is the water channel system of the sprinkler truck according to any one of claims 1 to 5, and the control method of the water channel system of the sprinkler truck includes: Get the target working mode of the sprinkler truck; Determining a target rotation speed and a target water flow rate of the water pump according to a target operating mode of the sprinkler truck; Acquiring environmental parameters, wherein the environmental parameters include environmental temperature and environmental humidity; Determining a target gas flow rate according to the ambient humidity and the target water flow rate; Obtain the pressure value at the contraction section of the Venturi tube; Determining a target output pressure of the pressure control valve according to the target gas flow rate, the ambient temperature and the pressure value at the contraction section of the venturi tube; According to the target output pressure, a target input current of the pressure control valve is determined.

7. The control method of the water system of a sprinkler truck according to claim 6, characterized in that: Determining the target speed and target water flow rate of the water pump according to the target working mode of the sprinkler truck includes: Determine the target speed of the water pump corresponding to the target working mode of the water truck according to the preset corresponding relationship between each working mode of the water truck and the speed of the water pump; According to the preset corresponding relationship between the water flow rate and the rotation speed of the water pump, a target water flow rate corresponding to the target rotation speed of the water pump is determined.

8. The control method of the water system of a sprinkler truck according to claim 7, characterized in that: The step of determining the target gas flow rate according to the ambient humidity and the target water flow rate includes: Determining the gas mixing ratio corresponding to the ambient humidity according to the preset corresponding relationship between the ambient humidity and the gas mixing ratio; A target gas flow rate corresponding to the target water flow rate is determined according to a calculation model of the gas mixing ratio and the target water flow rate.

9. The control method of the water system of a sprinkler truck according to claim 6, characterized in that: Determining the target input current of the pressure control valve according to the target output pressure includes: According to a preset corresponding relationship between the output pressure and the input current of the pressure control valve, a target input current corresponding to the target output pressure is determined.

10. A water sprinkler, characterized in that: It comprises a sprinkler truck water channel system as described in any one of claims 1 to 5, or comprises a control device, wherein the control device is capable of executing a sprinkler truck water channel system control method as described in any one of claims 6 to 9.

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