Water-air mixing system and working vehicle

Abstract

The utility model provides a kind of water-gas mixing system and operation car, it is related to sanitation vehicle field.Water-gas mixing system includes water pump, gas supply component, at least one venturi component and at least one spray head.Venturi component includes venturi and reversing valve.Venturi includes gradually tapering pipe, throat pipe and gradually expanding pipe connected in sequence, water pump is connected with gradually tapering pipe, throat pipe is provided with connecting port, and gas supply component is connected in connecting port.Reversing valve is arranged in the gas path between gas supply component and connecting port.Reversing valve has opening state and closed state, reversing valve can block gas supply component to supply gas to connecting port when in closed state, and reversing valve can make gas supply component and connecting port communicate when in opening state.Spray head is correspondingly arranged with venturi component, and is connected with gradually expanding pipe.It can realize water-saving operation under the premise of ensuring flushing operation efficiency by water-gas mixing.

Description

Technical Field

[0001] This utility model relates to the field of sanitation vehicle technology, and more specifically, to a water-air mixing system and a work vehicle. Background Technology

[0002] As a professional municipal sanitation vehicle used in urban roads, garden landscapes, industrial plants and other scenarios to perform cleaning, watering and dust suppression operations, the traditional operating mode of water sprinkler trucks usually relies on water pumps to pump water out of the water tank, control the flow through a pneumatic shut-off valve, and then use different specifications of spray components such as duckbill nozzles, flushing devices, and mist cannons to achieve the functions of ground washing or air dust suppression.

[0003] However, with the increasing prominence of global water scarcity and the continuous upgrading of environmental protection standards, how to achieve water-saving operation while ensuring the efficiency of flushing operations has become a technical challenge that the industry urgently needs to overcome. Utility Model Content

[0004] The purpose of this utility model is to provide a water-air mixing system and a work vehicle, which can achieve water-saving operation while ensuring the efficiency of the flushing operation through water-air mixing.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, this application provides a water-air mixing system, comprising:

[0007] Water pump;

[0008] Gas supply components;

[0009] At least one Venturi assembly, the Venturi assembly comprising a Venturi tube and a reversing valve;

[0010] The venturi tube includes a converging tube, a throat tube, and a diverging tube connected in sequence. The water pump is connected to the converging tube, the throat tube is provided with a connection port, and the air supply assembly is connected to the connection port.

[0011] The reversing valve is disposed in the air passage between the air supply component and the connection port. The reversing valve has an open state and a closed state. When the reversing valve is closed, it can block the air supply component from supplying air to the connection port. When the reversing valve is open, it can connect the air supply component with the connection port.

[0012] At least one nozzle is provided corresponding to the venturi assembly and connected to the diffuser.

[0013] In an optional implementation, the Venturi assembly further includes a one-way valve;

[0014] The one-way valve is located in the gas path between the connection port and the reversing valve, and the one-way valve allows gas to flow in one direction towards the connection port.

[0015] In an optional embodiment, the Venturi assembly further includes a flow control valve connected in the air passage between the check valve and the reversing valve.

[0016] In an optional embodiment, the Venturi assembly further includes a quick-release valve having a first connection port, a second connection port, and an exhaust port;

[0017] The first connection port is connected to the flow control valve, and the second connection port is connected to the check valve;

[0018] When fluid flows from the reversing valve toward the check valve, the quick-release valve enables the first connection port to be connected to the second connection port;

[0019] When fluid flows from the one-way valve to the reversing valve, the quick-release valve enables the second connection port to be connected to the exhaust port.

[0020] In an optional embodiment, the air supply assembly includes an air compressor and an air tank, wherein the air supply port of the air compressor is connected to the inlet of the air tank, and the outlet of the air tank is connected to the reversing valve.

[0021] The air storage tank is equipped with a differential pressure switch, which is used to control the start and stop of the air compressor.

[0022] In an optional embodiment, the venturi assembly further includes a pressure sensor disposed in the trachea to detect pressure within the trachea.

[0023] In an optional embodiment, the Venturi assembly further includes a control valve disposed in the conduit where the nozzle connects to the diffuser of the Venturi tube.

[0024] Secondly, this application also provides a work vehicle, including a vehicle body, a water tank disposed on the vehicle body, and a water-air mixing system as described in any of the above optional embodiments;

[0025] The water-air mixing system is installed on the vehicle body, and the water pump is connected to the water tank.

[0026] In an optional embodiment, the water-air mixing system includes a plurality of Venturi components and a plurality of nozzles, the plurality of Venturi components and the plurality of nozzles being configured accordingly.

[0027] In an optional embodiment, the plurality of nozzles includes a left counter-current nozzle and a right counter-current nozzle;

[0028] And / or, the plurality of nozzles includes a left sprinkler head and a right sprinkler head;

[0029] And / or, the plurality of nozzles includes a left duckbill nozzle and a right duckbill nozzle.

[0030] The beneficial effects of the water-air mixing system and the work vehicle provided in this embodiment of the invention include:

[0031] This application incorporates a Venturi tube assembly, connecting a water pump to the converging section of the Venturi tube, and a connection port at the throat. An air supply assembly is connected to this connection port, and the nozzle is then connected to the diffuser. A reversing valve is installed in the air path between the air supply assembly and the connection port. This allows for water flushing in some cleaning scenarios by closing the reversing valve. In other scenarios, the reversing valve can be opened to allow water and air to mix within the Venturi tube, achieving a water-air flushing mode. The Venturi tube design also increases fluid velocity and reduces pressure as it passes through the narrow throat, facilitating the introduction of air into the water and providing a higher flow rate for better flushing. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the principle connection of the water-air mixing system provided in this embodiment;

[0034] Figure 2 This is a circuit connection diagram of the water-air mixing system provided in this embodiment;

[0035] Figure 3 This is a schematic diagram of the working vehicle provided in this embodiment.

[0036] Icons: 100-Water-Air Mixing System; 110-Water Pump; 120-Air Supply Components; 121-Air Compressor; 122-Air Tank; 123-Differential Pressure Switch; 130-Venturi Tube; 131-Converging Tube; 132-Throat; 133-Diverging Tube; 134-Connection Port; 135-First Venturi Tube; 136-Second Venturi Tube; 137-Third Venturi Tube; 138-Fourth Venturi Tube; 139-Fifth Venturi Tube; 140-Sixth Venturi Tube; 150-Directional Control Valve; 151-First Directional Control Valve ; 152-Second directional valve; 153-Third directional valve; 154-Fourth directional valve; 155-Fifth directional valve; 156-Sixth directional valve; 160-Sprinkler head; 161-Left counter-current nozzle; 162-Right counter-current nozzle; 163-Left duckbill nozzle; 164-Right duckbill nozzle; 165-Left sprinkler head; 166-Right sprinkler head; 170-Check valve; 171-First check valve; 172-Second check valve; 173-Third check valve; 174-Fourth check valve; 175-Fifth check valve; 176 - Sixth check valve; 180- Quick exhaust valve; 181- First connection port; 182- Second connection port; 183- Exhaust port; 184- First quick exhaust valve; 185- Second quick exhaust valve; 186- Third quick exhaust valve; 187- Fourth quick exhaust valve; 188- Fifth quick exhaust valve; 189- Sixth quick exhaust valve; 190- Flow control valve; 191- First flow control valve; 192- Second flow control valve; 193- Third flow control valve; 194- Fourth flow control valve; 195- Fifth flow control valve; 196- Sixth Flow control valve; 200-Control valve; 201-First control valve; 202-Second control valve; 203-Third control valve; 204-Fourth control valve; 205-Fifth control valve; 206-Sixth control valve; 210-Pressure sensor; 211-First pressure sensor; 212-Second pressure sensor; 213-Third pressure sensor; 214-Fourth pressure sensor; 215-Fifth pressure sensor; 216-Sixth pressure sensor; 220-Controller; 300-Work vehicle; 310-Water tank. Detailed Implementation

[0037] As a professional municipal sanitation vehicle used in urban roads, garden landscapes, industrial plants and other scenarios to perform cleaning, watering and dust suppression operations, the traditional operating mode of water sprinkler trucks usually relies on water pumps to pump water out of the water tank, control the flow through a pneumatic shut-off valve, and then use different specifications of spray components such as duckbill nozzles, flushing devices, and mist cannons to achieve the functions of ground washing or air dust suppression.

[0038] However, with the increasing prominence of global water scarcity and the continuous upgrading of environmental protection standards, how to achieve water-saving operation while ensuring the efficiency of flushing operations has become a technical challenge that the industry urgently needs to overcome.

[0039] To address the aforementioned issues, this utility model provides a water-air mixing system and a work vehicle that achieves water-saving operation while ensuring the efficiency of the washing operation through water-air mixing.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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 this utility model.

[0044] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0045] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0046] The following describes in detail the overall structure, working principle, and technical effects of the water-air mixing system 100 and the work vehicle 300 provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0047] Please refer to Figure 1 and Figure 2 This embodiment provides a water-air mixing system 100, which can be applied to cleaning equipment such as 300 work vehicles to achieve rinsing and cleaning.

[0048] Please refer to Figure 1 and Figure 2 In this embodiment, the water-air mixing system 100 includes a water pump 110, an air supply assembly 120, at least one set of Venturi components, and at least one nozzle 160. The Venturi assembly includes a Venturi tube 130 and a reversing valve 150. The Venturi tube 130 includes a converging tube 131, a throat 132, and a diverging tube 133 connected in sequence. The water pump 110 is connected to the converging tube 131, and the throat 132 is provided with a connection port 134, to which the air supply assembly 120 is connected. The reversing valve 150 is disposed in the air passage between the air supply assembly 120 and the connection port 134. The reversing valve 150 has an open state and a closed state. When the reversing valve 150 is closed, it can prevent the air supply assembly 120 from supplying air to the connection port 134. When the reversing valve 150 is open, it can allow the air supply assembly 120 to communicate with the connection port 134. The nozzle 160 is configured to correspond with the venturi assembly and is connected to the diffuser 133.

[0049] This embodiment features a Venturi tube 130, with the water pump 110 connected to the converging tube 131 of the Venturi tube 130. A connection port 134 is provided in the throat 132, connecting the air supply assembly 120 to the connection port 134. The nozzle 160 is then connected to the diffuser 133. A reversing valve 150 is installed in the air path between the air supply assembly 120 and the connection port 134. In some cleaning scenarios, the reversing valve 150 can be closed to achieve a water flushing mode. In other scenarios, the reversing valve 150 can be opened to allow water and air to mix in the Venturi tube 130, achieving a water-air flushing mode. The Venturi tube 130 also allows the fluid to flow faster and at lower pressure as it passes through the narrow throat 132, facilitating the introduction of air into the water and providing a higher flow rate for better flushing.

[0050] In this embodiment, the reversing valve 150 is a two-position two-way reversing valve 150, a two-position three-way reversing valve 150, etc. In other embodiments of this application, the reversing valve 150 may also adopt other pneumatic valve bodies with shut-off functions.

[0051] Please refer to Figure 1 and Figure 2 Furthermore, the venturi assembly also includes a one-way valve 170. The one-way valve 170 is disposed in the gas path between the connection port 134 and the reversing valve 150, and the one-way valve 170 allows gas to flow in one direction towards the connection port 134.

[0052] The one-way valve 170 is designed to prevent water from flowing back from the connection port 134 into the air circuit and into the pneumatic components of the reversing valve 150 when the pressure in the throat 132 of the venturi tube 130 is high, which could damage the pneumatic components.

[0053] Furthermore, the connection port 134 is arranged radially along the throat 132, and the one-way valve 170 is threadedly installed on the connection port 134. Of course, the one-way valve 170 is also connected to the connection port 134 via a pipeline.

[0054] Please refer to Figure 1 and Figure 2 In this embodiment, the Venturi assembly further includes a quick-release valve 180, which has a first connection port 181, a second connection port 182, and an exhaust port 183. The first connection port 181 is connected to the reversing valve 150, and the second connection port 182 is connected to the check valve 170. When fluid flows from the reversing valve 150 to the check valve 170, the quick-release valve 180 enables the first connection port 181 to be connected to the second connection port 182. When fluid flows from the check valve 170 to the reversing valve 150, the quick-release valve 180 enables the second connection port 182 to be connected to the exhaust port 183.

[0055] In this embodiment, the quick-release valve 180 can prevent water from being discharged to the outside through the exhaust port 183 in the event that the one-way valve 170 fails or jams and cannot be completely shut off, thereby avoiding damage to the pneumatic components of the air circuit.

[0056] It should be noted that the exhaust port 183 is connected to the external environment. When water flows to the quick exhaust valve 180, the quick exhaust valve 180 will connect the second connection port 182 to the exhaust port 183, thereby guiding the water to the outside of the gas path.

[0057] Please refer to Figure 1 and Figure 2 Furthermore, the Venturi assembly also includes a flow control valve 190, which is connected to the first connection port 181 and the directional valve 150.

[0058] In this embodiment, a flow control valve 190 is installed in the air path between the reversing valve 150 and the quick exhaust valve 180. The flow control valve 190 can control the air flow in the air path, thereby achieving a better water-air mixing ratio.

[0059] Furthermore, the flow control valve 190 can be an electro-proportional valve.

[0060] The flow control valve 190 is mainly used to regulate the flow rate of gas. It controls the gas flow area by changing the opening of the valve disc, thereby achieving the purpose of controlling the flow rate.

[0061] Please refer to Figure 1 and Figure 2 Furthermore, the air supply assembly 120 includes an air compressor 121 and an air tank 122. The air supply port of the air compressor 121 is connected to the inlet of the air tank 122, and the outlet of the air tank 122 is connected to a reversing valve 150. The air tank 122 is equipped with a differential pressure switch 123, which is used to control the start and stop of the air compressor 121.

[0062] In this embodiment, the air supply component 120 is configured as an air compressor 121 and an air storage tank 122, so that a stable air source can be provided when water and air are mixed.

[0063] In this embodiment, the Venturi assembly also includes a pressure sensor 210, which is disposed in the throat 132 to detect the pressure within the throat 132.

[0064] In this embodiment, a pressure sensor 210 is installed in the throat 132 to detect the pressure in the throat 132, thereby facilitating the control of water and gas supply.

[0065] Specifically, the throat 132 has a mounting hole in its radial direction, and the pressure sensor 210 is installed in the mounting hole by thread.

[0066] In this embodiment, the Venturi assembly also includes a control valve 200, which is disposed in the pipeline connecting the nozzle 160 and the diffuser 133 of the Venturi tube 130.

[0067] When it is necessary to stop the operation, the control valve 200 can be closed to quickly stop the operation.

[0068] Please refer to Figure 1 and Figure 2 Furthermore, the water-air mixing system 100 also includes a controller 220. The pressure sensor 210, water pump 110, air compressor 121, reversing valve 150, flow control valve 190, etc. are all connected to the controller 220. The controller 220 can control the opening of the flow control valve 190 according to the pressure detected by the pre-pressure sensor 210 and according to the empirical data obtained by formula calculation or actual measurement, so as to provide the corresponding gas to the water circuit, achieve the effect of water saving and keep the water-air mixing ratio in a better state.

[0069] Please refer to Figure 1 , Figure 2 and Figure 3 Secondly, this embodiment also provides a work vehicle 300, which can be a water sprinkler truck. The work vehicle 300 includes a vehicle body, a water tank 310 disposed on the vehicle body, and the water-air mixing system 100 described in the above embodiment. The water-air mixing system 100 is disposed on the vehicle body, and the water pump 110 is connected to the water tank 310.

[0070] This embodiment improves the cleaning operation by installing the water-air mixing system on the work vehicle 300 and connecting the water pump 110 to the water tank.

[0071] Please refer to Figure 1 and Figure 2Furthermore, the number of nozzles 160 and venturi assemblies includes multiple units (i.e., the number of venturi tubes 130 and reversing valves 150 also includes multiple units). The converging tubes 131 of all venturi tubes 130 are connected to the water pump 110. Each nozzle 160 is connected to a corresponding diverging tube 133 of the venturi tube 130. Each reversing valve 150 is connected to a corresponding connection port 134 of the venturi tube 130 and is also connected to the air supply assembly 120.

[0072] This embodiment provides each nozzle 160 with a corresponding Venturi tube 130 and an air path, enabling different nozzles 160 to operate at the optimal water-air mixing ratio under different conditions, and allowing different nozzles 160 to be adapted to use with the optimal Venturi tube 130.

[0073] Please refer to Figure 1 , Figure 2 and Figure 3 Furthermore, the Venturi assembly includes multiple check valves 170, multiple quick-release valves 180, multiple flow control valves 190, and multiple control valves 200. Multiple nozzles 160 include a left-opposed nozzle 161 and a right-opposed nozzle 162. Multiple directional valves 150 include a first directional valve 151 and a second directional valve 152. Multiple Venturi tubes 130 include a first Venturi tube 135 and a second Venturi tube 136. Multiple check valves 170 include a first check valve 171 and a second check valve 172. Multiple quick-release valves 180 include a first quick-release valve 184 and a second quick-release valve 185. Multiple flow control valves 190 include a first flow control valve 191 and a second flow control valve 192. Multiple control valves 200 include a first control valve 201 and a second control valve 202. The first reversing valve 151, the first flow control valve 191, the first quick exhaust valve 184, and the first check valve 171 are sequentially connected to the connection port 134 of the first venturi tube 135. The first reversing valve 151 is connected to the air supply assembly 120. The converging tube 131 of the first venturi tube 135 is connected to the water pump 110. The expanding tube 133 of the first venturi tube 135 is connected to the left counter-current nozzle 161. The first control valve 201 is located in the pipeline connecting the expanding tube 133 of the first venturi tube 135 and the left counter-current nozzle 161. The second reversing valve 152, the second flow control valve 192, the second quick exhaust valve 185, and the second check valve 172 are sequentially connected to the connection port 134 of the second venturi tube 136. The second reversing valve 152 is connected to the air supply assembly 120. The converging tube 131 of the second venturi tube 136 is connected to the water pump 110. The expanding tube 133 of the second venturi tube 136 is connected to the right counter-current nozzle 162. The second control valve 202 is installed in the pipeline connecting the expanding tube 133 of the second venturi tube 136 and the right counter-current nozzle 162.

[0074] The above settings allow both the left counter-current nozzle 161 and the right counter-current nozzle 162 of the work vehicle 300 to achieve water-air mixing through the venturi tube 130, and the minimum spray distance of the nozzle 160 can reach 12 meters.

[0075] It should be noted that the left counter-current nozzle 161 and the right counter-current nozzle 162 are generally located at the bottom of the vehicle body. The left counter-current nozzle 161 faces the left side of the vehicle, and the right counter-current nozzle 162 faces the right side of the vehicle. When the 300 working vehicles are in motion, water is sprayed on both sides of the 300 working vehicles or on one side of the left and right to achieve road washing.

[0076] In this embodiment, the plurality of nozzles 160 further include a left duckbill nozzle 163 and a right duckbill nozzle 164. The plurality of reversing valves 150 further include a third reversing valve 153 and a fourth reversing valve 154. The plurality of venturi tubes 130 further include a third venturi tube 137 and a fourth venturi tube 138. The plurality of check valves 170 further include a third check valve 173 and a fourth check valve 174. The plurality of quick-release valves 180 further include a third quick-release valve 186 and a fourth quick-release valve 187. The plurality of flow control valves 190 further include a third flow control valve 193 and a fourth flow control valve 194. The plurality of control valves 200 further include a third control valve 203 and a fourth control valve 204. The third directional valve 153, the third flow control valve 193, the third quick exhaust valve 186, and the third check valve 173 are sequentially connected to the connection port 134 of the third venturi tube 137. The third directional valve 153 is connected to the air supply assembly 120. The converging tube 131 of the third venturi tube 137 is connected to the water pump 110. The expanding tube 133 of the third venturi tube 137 is connected to the left duckbill nozzle 163. The third control valve 203 is installed in the pipeline connecting the expanding tube 133 of the third venturi tube 137 and the left duckbill nozzle 163. The fourth directional valve 154, the fourth flow control valve 194, the fourth quick exhaust valve 187, and the fourth check valve 174 are sequentially connected to the connection port 134 of the fourth venturi tube 138. The fourth directional valve 154 is connected to the air supply assembly 120. The converging tube 131 of the fourth venturi tube 138 is connected to the water pump 110. The expanding tube 133 of the fourth venturi tube 138 is connected to the right duckbill nozzle 164. The fourth control valve 204 is installed in the pipeline connecting the expanding tube 133 of the fourth venturi tube 138 and the right duckbill nozzle 164.

[0077] This implementation, through the above-mentioned configuration, allows both the left duckbill nozzle 163 and the right duckbill nozzle 164 of the work vehicle 300 to achieve water-air mixing through the venturi tube 130, thereby achieving better road washing.

[0078] Normally, the left duckbill nozzle 163 and the right duckbill nozzle 164 are respectively located on the left and right sides of the bottom front of the vehicle body. When the 300 work vehicles are in motion, water is sprayed in a curtain-like pattern towards the front of the 300 work vehicles, thereby washing the road surface.

[0079] In this embodiment, the plurality of sprinkler heads 160 further include a left sprinkler head 165 and a right sprinkler head 166. The plurality of directional valves 150 further include a fifth directional valve 155 and a sixth directional valve 156. The plurality of venturi tubes 130 further include a fifth venturi tube 139 and a sixth venturi tube 140. The plurality of check valves 170 further include a fifth check valve 175 and a sixth check valve 176. The plurality of quick-drain valves 180 further include a fifth quick-drain valve 188 and a sixth quick-drain valve 189. The plurality of flow control valves 190 further include a fifth flow control valve 195 and a sixth flow control valve 196. The plurality of control valves 200 further include a fifth control valve 205 and a sixth control valve 206. The fifth directional valve 155, the fifth flow control valve 195, the fifth quick exhaust valve 188, and the fifth check valve 175 are sequentially connected to the connection port 134 of the fifth venturi tube 139. The fifth directional valve 155 is connected to the air supply assembly 120. The converging tube 131 of the fifth venturi tube 139 is connected to the water pump 110. The expanding tube 133 of the fifth venturi tube 139 is connected to the left sprinkler head 165. The fifth control valve 205 is installed in the pipeline connecting the expanding tube 133 of the third venturi tube 137 and the left sprinkler head 165. The sixth directional valve 156, the sixth flow control valve 196, the sixth quick exhaust valve 189, and the sixth check valve 176 are sequentially connected to the connection port 134 of the sixth venturi tube 140. The sixth directional valve 156 is connected to the air supply assembly 120. The converging tube 131 of the sixth venturi tube 140 is connected to the water pump 110. The expanding tube 133 of the sixth venturi tube 140 is connected to the right sprinkler head 166. The sixth control valve 206 is installed in the pipeline connecting the expanding tube 133 of the sixth venturi tube 140 and the right sprinkler head 166.

[0080] This embodiment can achieve water-air mixing through the above settings, so that the left sprinkler head 165 and the right sprinkler head 166 save more water when spraying water to suppress dust.

[0081] Normally, the left sprinkler head 165 and the right sprinkler head 166 are installed on the left and right sides of the rear of the vehicle, so that when the work vehicle 300 is moving, water is sprayed in a fan shape to the rear of the work vehicle 300 to carry out watering and dust suppression operations on the road surface behind the work vehicle 300, so that water can cover a certain area of ​​the road surface behind the vehicle.

[0082] It should also be noted that in some embodiments of this application, the first Venturi tube 135 and the second Venturi tube 136, along with related air passages and air supply elements, may be provided only for the left counter-current nozzle 161 and the right counter-current nozzle 162; or, the third Venturi tube 137 and the fourth Venturi tube 138, along with related air passages and air supply elements, may be provided only for the left duckbill nozzle 163 and the right duckbill nozzle 164; or, the fifth Venturi tube 139 and the sixth Venturi tube 140, along with related air passages and air supply elements, may be provided only for the left water spray nozzle 165 and the right water spray nozzle 166. Furthermore, the first Venturi tube 135, the second Venturi tube 136, the third Venturi tube 137, and the fourth Venturi tube 138, along with related air passages and air supply elements, may be provided only for the left counter-current nozzle 161, the right counter-current nozzle 162, the left duckbill nozzle 163, and the right duckbill nozzle 164. Alternatively, the first Venturi tube 135, the second Venturi tube 136, the fifth Venturi tube 139, and the sixth Venturi tube 140, along with related air passages and air supply components, may be provided only for the left counter-current nozzle 161, the right counter-current nozzle 162, the left sprinkler nozzle 165, and the right sprinkler nozzle 166. Alternatively, the third Venturi tube 137, the fourth Venturi tube 138, the fifth Venturi tube 139, and the sixth Venturi tube 140, along with related air passages and air supply components, may be provided only for the left duckbill nozzle 163, the right duckbill nozzle 164, the left sprinkler nozzle 165, and the right sprinkler nozzle 166. As can be seen, the first venturi tube 135, the second venturi tube 136, the third venturi tube 137, the fourth venturi tube 138, the fifth venturi tube 139, and the sixth venturi tube 140, as well as the corresponding related gas passages and gas passage components, can be selectively adapted according to actual needs to meet customized requirements.

[0083] Please refer to Figure 1 , Figure 2 and Figure 3Furthermore, the Venturi assembly also includes a controller 220 and a plurality of pressure sensors 210. The plurality of pressure sensors 210 are a first pressure sensor 211, a second pressure sensor 212, a third pressure sensor 213, a fourth pressure sensor 214, a fifth pressure sensor 215, and a sixth pressure sensor 216. The first pressure sensor 211 is disposed in the first Venturi tube 135 to detect the pressure within the throat 132 of the first Venturi tube 135. The second pressure sensor 212 is disposed in the second Venturi tube 136 to detect the pressure within the throat 132 of the second Venturi tube 136. The third pressure sensor 213 is disposed in the third Venturi tube 137 to detect the pressure within the throat 132 of the third Venturi tube 137. The fourth pressure sensor 214 is disposed in the fourth Venturi tube 138 to detect the pressure within the throat 132 of the fourth Venturi tube 138. The fifth pressure sensor 215 is installed in the fifth venturi tube 139 to detect the pressure within the throat 132 of the fifth venturi tube 139. The sixth pressure sensor 216 is installed in the sixth venturi tube 140 to detect the pressure within the throat 132 of the sixth venturi tube 140. The controller 220 is connected to the first pressure sensor 211, the second pressure sensor 212, the third pressure sensor 213, the fourth pressure sensor 214, the fifth pressure sensor 215, the sixth pressure sensor 216, the first reversing valve 151, the second reversing valve 152, the third reversing valve 153, the fourth reversing valve 154, the fifth reversing valve 155, the sixth reversing valve 156, the first flow control valve 191, the second flow control valve 192, the third flow control valve 193, the fourth flow control valve 194, the fifth flow control valve 195, the sixth flow control valve 196, the water pump 110, and the air supply assembly 120. The controller 220 can control the first reversing valve 151, the second reversing valve 152, the third reversing valve 153, the fourth reversing valve 154, the fifth reversing valve 155, and the sixth reversing valve 156 to switch between open and closed states according to instructions. The controller 220 can also control the opening degree of the first flow control valve 191 based on the pressure value detected by the first pressure sensor 211. The controller 220 can also control the opening degree of the second flow control valve 192 based on the pressure value detected by the second pressure sensor 212. The controller 220 can also control the opening degree of the third flow control valve 193 based on the pressure value detected by the third pressure sensor 213. The controller 220 can also control the opening degree of the fourth flow control valve 194 based on the pressure value detected by the fourth pressure sensor 214. The controller 220 can also control the opening degree of the fifth flow control valve 195 based on the pressure value detected by the fifth pressure sensor 215. The controller 220 can also control the opening degree of the sixth flow control valve 196 based on the pressure value detected by the sixth pressure sensor 216.

[0084] In this embodiment, the opening degree of the corresponding flow valve can be controlled by the pressure in the throat 132 of the corresponding venturi tube 130 through a pressure combination formula or empirical parameters, thereby achieving better water-air mixing and maintaining the water-air mixing ratio at a better value.

[0085] In summary, this embodiment utilizes a venturi tube 130, connecting the water pump 110 to the converging tube 131 of the venturi tube 130, and a connection port 134 in the throat 132. The air supply assembly 120 is connected to the connection port 134, and the nozzle 160 is connected to the diffuser 133. A reversing valve 150 is installed in the air path between the air supply assembly 120 and the connection port 134. In some cleaning scenarios, the reversing valve 150 can be closed to achieve a water flushing mode. In other scenarios, the reversing valve 150 can be opened to allow water and air to mix in the venturi tube 130, achieving a water-air flushing mode. The venturi tube 130 also allows the fluid to flow faster and at lower pressure as it passes through the narrow throat 132, facilitating the introduction of air into the water and providing a higher flow rate for better flushing.

[0086] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A water-air mixing system, characterized in that, include: Water pump (110); Gas supply assembly (120); At least one venturi assembly, the venturi assembly including a venturi tube (130) and a reversing valve (150). The Venturi tube (130) includes a converging tube (131), a throat tube (132) and a diverging tube (133) connected in sequence. The water pump (110) is connected to the converging tube (131). The throat tube (132) is provided with a connection port (134). The air supply assembly (120) is connected to the connection port (134). The reversing valve (150) is disposed in the air passage between the air supply assembly (120) and the connection port (134). The reversing valve (150) has an open state and a closed state. When the reversing valve (150) is in the closed state, it can block the air supply assembly (120) from supplying air to the connection port (134). When the reversing valve (150) is in the open state, it can connect the air supply assembly (120) and the connection port (134). At least one nozzle (160) is provided corresponding to the venturi assembly and connected to the diffuser (133).

2. The water-air mixing system according to claim 1, characterized in that, The Venturi assembly also includes a one-way valve (170). The one-way valve (170) is located in the gas path between the connection port (134) and the reversing valve (150), and the one-way valve (170) allows gas to flow unidirectionally towards the connection port (134).

3. The water-air mixing system according to claim 2, characterized in that, The Venturi assembly also includes a flow control valve (190) connected in the air passage between the check valve (170) and the reversing valve (150).

4. The water-air mixing system according to claim 3, characterized in that, The Venturi assembly also includes a quick-release valve (180) having a first connection port (181), a second connection port (182), and an exhaust port (183). The first connection port (181) is connected to the flow control valve (190), and the second connection port (182) is connected to the check valve (170); When fluid flows from the reversing valve (150) toward the check valve (170), the quick-release valve (180) enables the first connection port (181) to be connected to the second connection port (182); When fluid flows from the one-way valve (170) to the reversing valve (150), the quick-release valve (180) enables the second connection port (182) to be connected to the exhaust port (183).

5. The water-air mixing system according to any one of claims 1-4, characterized in that, The air supply assembly (120) includes an air compressor (121) and an air tank (122). The air supply port of the air compressor (121) is connected to the inlet of the air tank (122), and the outlet of the air tank (122) is connected to the reversing valve (150). The air storage tank (122) is equipped with a differential pressure switch (123), which is used to control the start and stop of the air compressor (121).

6. The water-air mixing system according to any one of claims 1-4, characterized in that, The Venturi assembly also includes a pressure sensor (210) disposed in the throat (132) to detect pressure within the throat (132).

7. The water-air mixing system according to any one of claims 1-4, characterized in that, The Venturi assembly also includes a control valve (200) disposed in the pipeline connecting the nozzle (160) and the diffuser (133) of the Venturi tube (130).

8. A work vehicle, characterized in that, Includes a vehicle body, a water tank (310) disposed on the vehicle body, and a water-air mixing system according to any one of claims 1-7; The water-air mixing system is installed on the vehicle body, and the water pump (110) is connected to the water tank (310).

9. The work vehicle according to claim 8, characterized in that, The water-air mixing system includes multiple Venturi components and multiple nozzles (160), which are correspondingly arranged.

10. The work vehicle according to claim 9, characterized in that, The plurality of nozzles (160) includes a left counter-current nozzle (161) and a right counter-current nozzle (162). And / or, the plurality of nozzles (160) includes a left sprinkler nozzle (165) and a right sprinkler nozzle (166). And / or, the plurality of nozzles (160) includes a left duckbill nozzle (163) and a right duckbill nozzle (164).

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