CN210642119U - Negative pressure type liquid spraying system and unmanned equipment - Google Patents

Abstract

The utility model discloses a negative pressure formula hydrojet system and unmanned aerial vehicle relates to hydrojet technical field. The negative pressure type liquid spraying system comprises a spray head, a gas circuit assembly and a liquid circuit assembly. The nozzle is provided with a cavity, a first inlet, a second inlet and an outlet which are communicated with the cavity. The air path assembly is communicated with the first inlet and is used for independently and controllably conveying compressed air through the first inlet box cavity. The liquid path assembly is communicated with the second inlet and is used for independently and controllably conveying liquid to the cavity through the second inlet, so that the liquid can be sprayed out from the outlet under the action of compressed air. The system can independently control the working states of the gas circuit component and the liquid circuit component according to the operation requirements, so that the selection and control of liquid spraying operation types such as quantitative liquid spraying and the like are realized, and the controllability of the system is improved. Meanwhile, residual liquid in the spray head can be sprayed out by controlling the independent work of the gas circuit component, so that the spraying liquid can be saved, the spraying effect is improved, the influence of residual liquid on the spray head is avoided, and the service life of the spray head is prolonged.

Description

Negative pressure type liquid spraying system and unmanned equipment

Technical Field

The utility model relates to a hydrojet technical field particularly, relates to a negative pressure formula hydrojet system and unmanned aerial vehicle.

Background

In the prior art, unmanned equipment such as unmanned vehicles and unmanned aerial vehicles can be utilized to spray agricultural operation such as medicaments, and the efficiency of agricultural operation can be effectively improved by carrying out agricultural operation through the unmanned equipment.

However, researches show that the liquid spraying device integrated on the unmanned equipment in the prior art has the technical problems of poor controllability, serious liquid waste and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a negative pressure hydrojet system, this negative pressure hydrojet system can be according to the operating condition of operation demand independent control gas circuit subassembly and liquid way subassembly to can realize the selection and the control of multiple hydrojet operation types such as ration hydrojet, and then can improve the controllability that the negative pressure hydrojet provided. Meanwhile, residual liquid in the spray head can be sprayed out by controlling the independent work of the air path component, so that the liquid spraying effect is improved, and the service life of the spray head is ensured.

Another object of the present invention includes providing an unmanned aerial vehicle, including the above-mentioned negative pressure liquid spraying system. Therefore, the unmanned equipment has the advantages of strong controllability, good liquid spraying effect, long service life and the like.

The embodiment of the utility model discloses a can realize like this:

in a first aspect, an embodiment of the present invention provides a negative pressure type liquid spraying system, including:

the spray head is provided with a cavity, a first inlet, a second inlet and an outlet which are communicated with the cavity;

the air path assembly is communicated with the first inlet and is used for independently and controllably conveying compressed air to the cavity through the first inlet;

and the liquid path assembly is communicated with the second inlet and is used for independently and controllably conveying liquid to the cavity through the second inlet, so that the liquid can be sprayed out from the outlet under the action of compressed air.

In an alternative embodiment, the air circuit assembly includes an air compressor in communication with the first inlet for generating compressed air.

In an optional implementation mode, the air path assembly further comprises an air storage tank, one end of the air storage tank is communicated with the air compressor and used for temporarily storing compressed air, and the other end of the air storage tank is communicated with the first inlet of the spray head and used for conveying the compressed air to the spray head.

In an optional embodiment, the air path assembly further includes a first check valve disposed between the air compressor and the air storage tank, and the first check valve is configured to prevent the air in the air storage tank from flowing back to the air compressor.

In an optional embodiment, the gas path assembly further comprises a pressure sensor and an automatic stop switch;

the pressure sensor is arranged in the gas storage tank and is used for detecting the gas pressure in the gas storage tank; the automatic stop switch is electrically connected with both the pressure sensor and the air compressor, and the automatic stop switch is configured to control the air compressor to be turned off when the detection value of the pressure sensor is higher than a first preset value.

In an optional embodiment, the air path assembly further includes a pressure relief valve disposed in the air storage tank, the pressure relief valve has an air release channel, and the pressure relief valve is configured to open the air release channel for air release when the pressure in the air storage tank is higher than a second preset value.

In an alternative embodiment, the pressure relief valve is a spring-loaded pressure relief valve.

In an optional embodiment, the air path assembly further includes a pressure regulating valve disposed between the air tank and the first inlet, and the pressure regulating valve is configured to adjust an output pressure of the compressed air output from the air tank.

In an alternative embodiment, the pressure regulating valve is a diaphragm pressure regulating valve.

In an alternative embodiment, the air channel assembly further includes a manifold defining a plurality of branches, each branch being connected between the air reservoir and the first inlet of one of the spray heads.

In an alternative embodiment, the collector bar comprises a collector plate provided with an air inlet and a plurality of air outlets communicating with the air inlet, the air inlet forming a branch with each air outlet.

In an optional embodiment, the bus bar is further provided with an air leakage port corresponding to each air outlet;

the confluence piece further comprises a plurality of electromagnetic valves, and each electromagnetic valve is arranged between an air outlet and an air outlet corresponding air leakage port and communicated with a first inlet of a sprayer.

In an alternative embodiment, the manifold plate is provided with a muffler for attenuating high frequency noise generated after the solenoid valve operates.

In an alternative embodiment, the fluid circuit assembly includes a fluid tank in communication with the second inlet.

In an optional embodiment, the liquid tank comprises a tank body and a tank cover, the tank body is sunken towards one side to form a sunken part, the sunken part is provided with an opening, and the tank cover is detachably covered on the opening.

In an optional embodiment, the liquid path assembly further comprises a second one-way valve, and the second one-way valve is disposed between the liquid tank and the second inlet and is configured to prevent the liquid from flowing back to the liquid tank.

In an alternative embodiment, the fluid circuit assembly further comprises a flow on/off valve disposed between the fluid tank and the second inlet and adapted to selectively cut off or communicate a passage between the fluid tank and the second inlet.

In a second aspect, embodiments of the present invention provide an unmanned aerial vehicle, including a negative pressure liquid spray system according to any one of the preceding embodiments.

The utility model discloses beneficial effect includes, for example:

an embodiment of the utility model provides a negative pressure formula hydrojet system, it includes shower nozzle, gas circuit subassembly and liquid way subassembly. Wherein, the shower nozzle is equipped with the cavity and with the first import of cavity intercommunication, second import and export. The air path assembly is communicated with the first inlet and is used for independently and controllably conveying compressed air through the first inlet box cavity. The liquid path assembly is communicated with the second inlet and is used for independently and controllably conveying liquid to the cavity through the second inlet, so that the liquid can be sprayed out from the outlet under the action of compressed air. The negative pressure type liquid spraying system can independently control the working states of the gas circuit component and the liquid circuit component according to the operation requirements through the arrangement of the gas circuit component and the liquid circuit component, so that the selection and the control of multiple liquid spraying operation types such as quantitative liquid spraying can be realized, and the controllability of the system can be improved. Meanwhile, the gas circuit component is controlled to work independently, the liquid circuit component is closed, and residual liquid in the spray head can be sprayed out, so that the spraying liquid can be effectively saved, the spraying effect is improved, meanwhile, the influence of residual liquid on the spray head is avoided, and the service life of the spray head is further prolonged.

The embodiment of the utility model provides an unmanned aerial vehicle, including foretell negative pressure hydrojet system. Therefore, the unmanned equipment has the advantages of strong controllability, good liquid spraying effect, long service life and the like.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a negative pressure type liquid spraying system according to an embodiment of the present invention at a first viewing angle;

fig. 2 is a schematic structural diagram of a negative pressure type liquid spraying system at a second viewing angle according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a negative pressure type liquid spraying system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a gas circuit assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a bus bar according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a bus bar according to an embodiment of the present invention at a first viewing angle;

fig. 7 is a schematic structural diagram of a bus bar according to an embodiment of the present invention at a second viewing angle;

fig. 8 is a schematic structural diagram of a solenoid valve provided in an embodiment of the present invention at a first viewing angle;

fig. 9 is a schematic structural diagram of a solenoid valve at a second viewing angle according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a fluid path assembly according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a liquid tank according to an embodiment of the present invention.

Icon: 100-negative pressure type liquid spraying system; 101-a spray head; 103-a first inlet; 105-a second inlet; 107-outlet; 109-a gas path component; 111-a liquid path component; 113-an air compressor; 115-a gas storage tank; 117-first one-way valve; 119-a sensing control; 121-a pressure sensor; 123-automatic stop switch; 125-relief valve; 127-pressure regulating valve; 129-a bus bar; 131-a bus bar; 133-a first gas inlet; 135-a second inlet; 137-first air outlet; 139-second outlet; 141-a first air escape opening; 143-a second air escape opening; 145-solenoid valve; 147-a muffler; 149-liquid box; 151-box body; 153-box cover; 155-a recess; 157-a second one-way valve; 159-liquid flow on-off valve; 161-outlet port; 163-bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Fig. 1 is a schematic structural diagram of a negative pressure type liquid spraying system 100 provided in this embodiment at a first viewing angle; fig. 2 is a schematic structural diagram of the negative pressure type liquid spraying system 100 provided in this embodiment at a second viewing angle; fig. 3 is a schematic structural diagram of the negative pressure type liquid spraying system 100 provided in this embodiment. Referring to fig. 1 to fig. 3, the present embodiment provides a negative pressure type liquid spraying system 100, and the negative pressure type liquid spraying system 100 can independently perform liquid spraying operation, and can also be installed on an unmanned device to perform liquid spraying operation in cooperation with the unmanned device.

In detail, when the negative pressure type liquid ejecting system 100 is installed in an unmanned apparatus, different types of liquid ejecting operations can be performed according to the type of liquid to be ejected. For example, when the spraying liquid is a medicine, the unmanned equipment can spray the medicine for crops or other plants, so that the labor burden of workers in spraying is reduced, and the spraying efficiency is improved; when the jet liquid is clear water, the unmanned equipment can perform cleaning, dust removal and other operations so as to meet the cleaning requirement and improve the cleaning efficiency; when the sprayed liquid is paint, the unmanned equipment can perform paint spraying operation so as to improve the paint spraying efficiency and uniformity. Here, the negative pressure type liquid ejecting system 100 will be described in detail with the ejection liquid as the medicine in the present embodiment.

In detail, referring to fig. 1 to 3 again, in the present embodiment, the negative pressure liquid spraying system 100 includes a nozzle 101, an air path assembly 109 and a liquid path assembly 111. Wherein, the air path assembly 109 and the liquid path assembly 111 are both communicated with the spray head 101.

Specifically, in the present embodiment, the spray head 101 may be selected as a negative pressure spray head 101, and a cavity (not shown) is disposed in the spray head 101. The surface of the nozzle 101 is further provided with a first inlet 103, a second inlet 105 and an outlet 107 which are communicated with the cavity. The first inlet 103 is mainly used for inputting compressed air into the air supply path assembly 109, the second inlet 105 is mainly used for inputting liquid into the liquid supply path assembly 111, and the outlet 107 is mainly used for spraying liquid. When spraying the medicine, the negative pressure of the compressed air can spray the liquid from the outlet 107, so as to realize the spraying.

It should be noted that the negative pressure type liquid spraying system 100 may further include an atomizing plate (not shown) at the rear end of the spraying head 101, and the atomizing plate may include a plurality of hole-like structures arranged in an array. When the spraying operation of the medicine is carried out, the medicine is sprayed out from the outlet 107 of the spray head 101 at a high speed under the pressure action of the compressed air, and then the atomization of the medicine is realized through the atomizing spray disk, so that the medicine spraying efficiency can be improved, and the medicine spraying quality of crops is also ensured.

Specifically, in the present embodiment, the air channel assembly 109 is in communication with the first inlet 103 of the showerhead 101. The air channel assembly 109 can generate compressed air and independently and controllably deliver the compressed air to the nozzle 101 through the first inlet 103, so as to provide a motive force for ejecting liquid, such as medicine, from the nozzle 101 and for later atomization.

Specifically, in the present embodiment, the liquid path assembly 111 is in communication with the second inlet 105 of the spray head 101, and the liquid path assembly 111 can provide liquid and independently and controllably feed the liquid into the spray head 101 through the second inlet 105, so that the liquid can be sprayed from the outlet 107 of the spray head 101 under the action of compressed air. When spraying the medicine, the compressed air is delivered to the first inlet 103 of the nozzle 101 by controlling the air path assembly 109, and the medicine is delivered to the second inlet 105 of the nozzle 101 by controlling the liquid path assembly 111, so that the medicine can be sprayed out from the outlet 107 of the nozzle 101 by pushing the air, thereby facilitating the efficient spraying of the medicine.

It should be noted that, the liquid path assembly 111 and the gas path assembly 109 are independently controllable branches. Therefore, when the crops need to be quantitatively sprayed, the liquid path assembly 111 can be controlled to input a corresponding amount of the medicine, and then the quantitative medicine is sprayed out through the gas path assembly 109. In addition, since the air channel assembly 109 can provide compressed air, by controlling parameters such as flow rate, pressure, etc. of the compressed air, the speed of the nozzle 101 from the outlet 107 can be controlled, so that the final atomization degree of the nozzle 101 can be controlled. Therefore, in summary, the negative pressure type liquid spraying system 100 can independently control the working states of the gas circuit assembly 109 and the liquid circuit assembly 111 according to the operation requirement by the independently controllable arrangement of the gas circuit assembly 109 and the liquid circuit assembly 111, so as to realize selection and control of multiple liquid spraying operation types such as quantitative liquid spraying, and further improve the controllability of the system.

It should be noted that, after the spraying operation of the medicine is finished, part of the medicine may remain in the cavity of the spray head 101, which may seriously affect the service life of the spray head 101 and waste the medicine. Therefore, the air path assembly 109 can be controlled to work independently at the moment, and the liquid path assembly 111 is closed, so that residual liquid in the spray head 101 is sprayed out under the action of compressed air, the sprayed liquid can be effectively saved, the liquid spraying effect is improved, meanwhile, the influence of residual liquid on the spray head 101 is avoided, and the service life of the spray head 101 is prolonged.

Fig. 4 is a schematic structural diagram of the air path assembly 109 provided in this embodiment. Referring to fig. 1 to 4, in the present embodiment, the air path assembly 109 includes an air compressor 113, an air storage tank 115 and a confluence piece 129.

In detail, the air compressor 113 is also called an air compressor, and is mainly used for generating compressed air to provide an air source. Compressed air is generated by the air compressor 113 and is input to the spray head 101 at a certain speed, so that the medicine in the spray head 101 can be sprayed out of the spray head 101 under the action of the compressed air.

In detail, in order to reduce the workload of the air compressor 113, an air reservoir 115 may be provided between the air compressor 113 and the first inlet 103 of the spray head 101. One end of the air storage tank 115 is communicated with the air compressor 113 for temporarily storing compressed air, and the other end of the air storage tank 115 is communicated with the first inlet 103 of the spray head 101 for conveying the compressed air to the spray head 101. The arrangement of the air storage tank 115 can reduce the workload of the air compressor 113, and prevent the cylinder of the air compressor 113 from being worn due to the overhigh temperature caused by continuous operation. Specifically, when the medicine spraying operation is performed, the air compressor 113 can be intermittently controlled to be turned on or off by the controller, when the air compressor 113 is turned on, the gas output by the air compressor 113 can be temporarily stored in the gas storage tank 115, and when the temperature of the air compressor 113 is too high, the air compressor 113 can be controlled to be turned off by the controller. At this time, since the gas storage tank 115 continues to output gas, the normal liquid spraying operation is not interrupted, and the operation can be performed efficiently while the service life of the air compressor 113 is ensured.

Preferably, in order to ensure the spraying efficiency of the system, the air path assembly 109 may further include a first check valve 117 as required. First check valve 117 connects on the pipeline of setting between air compressor machine 113 and gas holder 115, first check valve 117 is used for providing the one-way function that switches on for air compressor machine 113 output compressed air can input and keep in the gas holder 115, but the gas in the gas holder 115 can not flow back to air compressor machine 113 through the pipeline, thereby can avoid the appearance of the problem of the 113 efficiency reductions of air compressor machine that the gas backward flow caused, and then spout the high efficiency of medicine operation and go on effectively.

Further preferably, in order to ensure the safety of the system, the air channel assembly 109 may further be provided with a sensing control 119 according to the requirement, and the sensing control 119 may include a pressure sensor 121 and an automatic stop switch 123. The pressure sensor 121 is disposed in the gas tank 115 and is configured to detect a gas pressure in the gas tank 115. Meanwhile, the pressure sensor 121 may be electrically connected to a controller of the system, and a detection result of the pressure sensor 121 may be transmitted to the controller. The automatic stop switch 123 is electrically connected with the pressure sensor 121 and the air compressor 113, a closed loop is formed among and among the air storage tank 115, the pressure sensor 121, the automatic stop switch 123 and the air compressor 113, and the automatic stop switch 123 is configured to control the air compressor 113 to be turned off when a detection value of the pressure sensor 121 is higher than a first preset value. Specifically, the first preset value may be set according to design safety parameters of the gas tank 115. In the spraying process, after the pressure sensor 121 detects the pressure in the gas storage tank 115, the pressure can be transmitted to the controller, the controller compares the pressure with a first preset value, and if the pressure value is higher than the first preset value, the air compressor 113 can be turned off by the controllable automatic stop switch 123, so that the pressure in the gas storage tank 115 is prevented from continuously rising, the safety of the gas circuit assembly 109 can be ensured, and the safety of the whole negative pressure type liquid spraying system 100 is ensured.

Referring to fig. 4 again, in the present embodiment, in order to further ensure the safety of the air storage tank 115, a pressure relief valve 125 may be further disposed on the air storage tank 115, the pressure relief valve 125 has a relief passage, and the pressure relief valve 125 is configured to open the relief passage for relief when the pressure in the air storage tank 115 is higher than a second preset value. The second preset value may also be set according to design safety parameters of the air reservoir 115. The second preset value can be consistent with the first preset value, and can be lower than the first preset value, so that two-pole protection can be performed. Specifically, in the spraying process, when the pressure relief valve 125 senses that the pressure in the gas storage tank 115 is increased to the second preset value, the outside and the gas storage tank 115 can be conducted, so that the pressure in the gas storage tank 115 is prevented from continuously rising, the safety of the gas circuit assembly 109 can be further ensured, the safety of the whole negative pressure type liquid spraying system 100 is ensured, and the fault tolerance of the system is improved.

Preferably, in the present embodiment, the relief valve 125 may be a spring-type relief valve 125. When the air pressure in the air storage tank 115 exceeds the second preset value and the pressure acting on the air release valve is greater than the self pressure of the spring in the pressure release valve 125, the spring can be compressed, so that the air release channel is opened to exhaust air, and the fault-tolerant rate of the system is improved.

In this embodiment, the sensing control member 119 and the spring-loaded relief valve 125 may be used in combination to mechanically protect the gas path system. For example, the first preset value and the second preset value may be set to be the same value, and when the actual pressure in the air storage tank 115 exceeds the preset pressure, on one hand, the controller may control the automatic stop switch 123 to close the air compressor 113, and on the other hand, the pressure relief valve 125 may be used to relieve the pressure, so that the pressure in the air storage tank 115 may be quickly and effectively balanced, and the normal operation of the spraying operation may be ensured.

Referring to fig. 1 to 4 again, in the present embodiment, the air path assembly 109 may further include a pressure regulating valve 127 according to requirements. The pressure regulating valve 127 is disposed between the air tank 115 and the first inlet 103, and the pressure regulating valve 127 is used for adjusting the output pressure of the compressed air output from the air tank 115. The pressure of the compressed air delivered to the spray head 101 can be controlled by the pressure regulating valve 127, and the velocity of the spray head 101 from the outlet 107 can be controlled by controlling the pressure of the compressed air, so that the final atomization degree of the spray head 101 can be controlled, different liquefaction effects can be achieved, selection and control of various liquid spraying operation types can be realized, and the controllability of the system can be improved.

Preferably, in the present embodiment, the pressure regulating valve 127 may be a diaphragm type pressure regulating valve 127. The pressure regulation principle of the diaphragm pressure regulating valve 127 is mainly intercepting regulation. The pressure regulating valve 127 is provided with an airflow hole, a diaphragm is arranged in a cavity of the pressure regulating valve 127, one side of the diaphragm is an airflow surface, and the other side of the diaphragm is a valve rod regulating surface. The valve rod is connected with the diaphragm and can be used for controlling the size of the airflow hole. When the knob of the pressure regulating valve 127 is rotated clockwise, the membrane is extruded to deform downwards, the airflow hole is blocked, and the sectional area of the airflow channel is changed to change the gas output pressure. Through the design of the diaphragm type pressure regulating valve 127, the output gas pressure of the gas storage tank 115 can be conveniently regulated, so that different liquefaction effects are achieved.

Fig. 5 is a schematic structural diagram of the bus bar 129 provided in this embodiment. Referring to fig. 5, in the present embodiment, the air path assembly 109 further includes a junction 129, the junction 129 is mainly used to form a plurality of branches, each branch is connected between the air storage tank 115 and the first inlet 103 of one of the nozzles 101, so that each branch can be connected to one of the nozzles 101, and thus the negative pressure liquid spraying system 100 can be connected to a plurality of nozzles 101, so as to implement the common operation of the plurality of nozzles 101, and further effectively improve the spraying efficiency of the medicine.

In detail, fig. 6 is a schematic structural diagram of the bus bar 131 provided in this embodiment in a first viewing angle; fig. 7 is a schematic structural diagram of the bus bar 131 provided in this embodiment in a second view angle. Referring to fig. 5 to 7, in the present embodiment, the bus bar 129 includes a bus plate 131. The bus bar 131 is disposed in a plate shape, the first air inlet 133 is disposed in the bus bar 131, and a channel communicated with the first air inlet 133 is disposed in the bus bar 131 and extends along a length direction of the bus bar 131, so that compressed air output from the air storage tank 115 can be conveyed along the length direction of the bus bar 131. Meanwhile, a plurality of first air outlets 137 are further formed in the bus bar 131, the plurality of first air outlets 137 are arranged at intervals along the length direction of the bus bar 131 and are communicated with the first air inlets 133, so that compressed air input by the first air inlets 133 is conducted through the plurality of first air outlets 137, and a branch can be formed between each first air inlet 133 and each first air outlet 137. Each branch can be connected with one spray head 101, so that the high-efficiency operation of the multiple spray heads 101 can be realized.

It should be noted that, the delivery channel of the compressed air can be divided into a plurality of branches by one collecting plate 131, and the usage of the flow dividing assembly can be correspondingly reduced, so that the pressure loss of the compressed air can be reduced, and the spraying effect of the medicine can be ensured.

Fig. 8 is a schematic structural diagram of the electromagnetic valve 145 according to the present embodiment at a first viewing angle; fig. 9 is a schematic structural diagram of the electromagnetic valve 145 according to the present embodiment at a second viewing angle. Referring to fig. 1 to 9, in the present embodiment, in order to further improve the controllability of the system, the confluence part 129 further includes a plurality of solenoid valves 145. And a first air release port 141 is further provided on the bus bar 131 corresponding to each first air outlet 137. Each solenoid valve 145 is disposed between one first air outlet 137 and the first air release port 141 corresponding to the first air outlet 137, and is communicated with the first inlet 103 of one nozzle 101 to control and regulate the delivery of the compressed air of each corresponding branch.

In detail, referring to fig. 8 and 9, a second air inlet 135 and a second air release opening 143 are disposed at a lower end of each electromagnetic valve 145, a second air outlet 139 communicated with the second air inlet 135 is disposed at an upper end of each electromagnetic valve 145, and an outlet 161 electrically connected to a controller or a power supply is further disposed at an upper end of each electromagnetic valve 145, so as to control the operation start and stop of each electromagnetic valve 145. Specifically, when the electromagnetic valve 145 is disposed on the manifold plate 131, the second air inlet 135 of the electromagnetic valve 145 is opposite to the first air outlet 137 disposed at a corresponding position on the manifold plate 131, so that the compressed air output by the air compressor 113 can sequentially pass through the manifold plate 131 and the electromagnetic valve 145 and then reach the first inlet 103 of the spray head 101, thereby ensuring normal operation of spraying. Meanwhile, when the solenoid valve 145 is disposed on the bus bar 131, the second air release opening 143 of the solenoid valve 145 may also communicate with the first air release opening 141 disposed at a corresponding position on the bus bar 131, so as to perform air release operation under the condition of excessive pressure, thereby ensuring the safety of the bus bar 129 and further ensuring the safety of the whole negative pressure type liquid spraying system 100.

It should be noted that, since the delivery channel of the compressed air is divided into a plurality of branches, each branch can be controlled by selecting one solenoid valve 145 correspondingly. Therefore, the spraying time of different nozzles 101 can be controlled by the electromagnetic valve 145, so that the spraying amount and the spraying effect can be controlled at the same time, and the operability and controllability of the negative pressure type spraying system 100 can be improved to meet various operation requirements.

It should be noted that, in this embodiment, the electromagnetic valve 145 may be mounted on the bus plate 131 through the bolts 163 to improve the connection strength therebetween, so as to ensure the normal and efficient operation of the gas transmission operation of each branch. It should be noted that, in other embodiments of the present invention, the installation manner of the electromagnetic valve 145 and the bus board 131 may also be adjusted according to requirements, for example, a connection manner such as plugging may be selected, and the embodiments of the present invention are not limited.

Preferably, referring to fig. 8 and 9 again, the collecting plate 131 is provided with a silencer 147, and the silencer 147 is mainly used for attenuating high-frequency noise generated by high-pressure and high-speed airflow generated after the operation of the electromagnetic valve 145 is finished.

Specifically, in the present embodiment, the muffler 147 may be disposed at an end portion of the bus bar 131, which is away from the air storage tank 115, and may communicate with the first air inlet 133. The muffler 147 is cylindrically shaped and may be specifically selected from noise reduction devices such as pipes and elbows with acoustic liners or pipes with abrupt changes in cross-sectional area and other discontinuities in acoustic impedance so that the noise generated by the solenoid valve 145 is attenuated or reflected back. Of course, in other embodiments of the present invention, the position of the muffler 147 may also be adjusted according to the requirement, for example, the position may be selected to be set at the middle portion of the bus bar 131, and the embodiments of the present invention are not limited.

Fig. 10 is a schematic structural diagram of the liquid path assembly 111 provided in this embodiment. Referring to fig. 1, fig. 2, fig. 3 and fig. 10, in the present embodiment, the liquid path assembly 111 includes a liquid tank 149, and the liquid tank 149 communicates with the second inlet 105 to deliver liquid, such as medicine, toward the spray head 101. Meanwhile, it should be noted that, when the unmanned device is selected as an unmanned vehicle or an unmanned aerial vehicle, the liquid tank 149 is pluggable to the back of the unmanned device, so as to facilitate disassembly.

In detail, fig. 11 is a schematic structural diagram of the liquid tank 149 provided in this embodiment. Referring to fig. 10 and 11, in the present embodiment, the liquid tank 149 includes a tank 151 and a tank cover 153, and the tank 151 can store liquid such as medicine. Meanwhile, the box 151 may be recessed upward to form a recess 155, the recess 155 is substantially U-shaped, the recess 155 is opened with an opening, and the box cover 153 is detachably covered on the opening. Set up the uncovered of box 151 in this depressed part 155 on the one hand can avoid liquid to spill easily and leak, thereby on the other hand can hide case lid 153 in depressed part 155 in the aesthetic property of assurance equipment, the user of being convenient for gets to take the dismantlement, and the security of protection uncovered department, further avoids the weeping. Of course, in other embodiments of the present invention, the installation position of the box cover 153 may also be selected according to requirements, for example, the installation position may be installed at the side or the side lower part of the box 151, and the embodiments of the present invention are not limited.

Referring to fig. 1, fig. 2 and fig. 10 again, in the present embodiment, the liquid path assembly 111 further includes a second one-way valve 157, the second one-way valve 157 is mainly used for one-way communication, and the second one-way valve 157 may be disposed on a pipe between the liquid tank 149 and the second inlet 105 and is used for preventing liquid from flowing back to the liquid tank 149. The liquid output from the liquid tank 149 cannot flow back due to the second check valve 157, so that the liquid remaining in the liquid tank 149 is prevented from being contaminated.

Preferably, in this embodiment, since the nozzle 101 can adjust its height according to different working requirements during operation, the height of the outlet 107 of the nozzle 101 relative to the ground may be lower than the liquid level of the liquid tank 149. So that a siphon phenomenon may be formed at the nozzle 101, which causes the liquid medicine to freely flow along the pipeline to the outlet of the negative pressure nozzle 101 to cause dripping. Therefore, to further ensure the efficiency and quality of the drug spraying, the fluid path assembly 111 may further be provided with a fluid on-off valve 159 as required. A flow on/off valve 159 is provided in the conduit between the tank 149 and the second inlet 105 and is used to selectively shut off or communicate the path between the tank 149 and the second inlet 105. By the arrangement of the liquid flow on-off valve 159, the liquid flow passage can be cut off when the spraying is not needed, thereby effectively preventing the siphon phenomenon from forming at the spray nozzle 101 and further ensuring the quality and efficiency of the spraying operation.

Meanwhile, it should be noted that, by the arrangement of the liquid flow on-off valve 159, when the liquid path component 111 is closed, the high-pressure air flow output by the air path component 109 blows out the residual liquid medicine in the cavity of the spray head 101, so that the spray head 101 can be prevented from being blocked by the residual liquid medicine, and the service life of the spray head 101 can be correspondingly prevented from being affected. Meanwhile, due to the blowing of the residual medicine, the use amount of the pesticide can be correspondingly reduced, and the spraying effect is improved.

The embodiment of the utility model provides an unmanned aerial vehicle is still provided, and specifically is unmanned car, and this unmanned car spouts the medicine system including automobile body and foretell negative pressure formula. The negative pressure type pesticide spraying system is arranged on the vehicle body, and can carry out negative pressure type pesticide spraying operation on peripheral crops along with the movement of the unmanned vehicle. Of course, the utility model discloses an in other embodiments, this negative pressure formula spouts medicine system can also set up on unmanned aerial vehicle for carry out the medicine along with unmanned aerial vehicle's airline and spray, the embodiment of the utility model is no longer repeated.

The following describes in detail the installation manner and the operation principle of the negative pressure type liquid spraying system 100 and the unmanned device according to the embodiment of the present invention:

when the negative pressure type liquid spraying system 100 provided in this embodiment is installed, the liquid path assembly 111 and the air path assembly 109 may be sequentially connected according to the schematic diagram shown in fig. 3, and then the air path assembly 109 is respectively communicated with the first outlet 107, and the liquid path assembly 111 is communicated with the second outlet 107. When the air path assembly 109 is assembled, the air compressor 113, the first check valve 117, the air tank 115, the bus plate 131, and the solenoid valve 145 are sequentially connected, and then the relief valve 125, the pressure regulating valve 127, and the pressure sensor 121 are disposed in the air tank 115, and a closed circuit is formed among the air tank 115, the pressure sensor 121, the automatic stop switch 123, and the air compressor 113. When the liquid path block 111 is assembled, the liquid tank 149, the second check valve 157, and the liquid flow on-off valve 159 may be connected in this order.

When the negative pressure type liquid spraying system 100 provided by this embodiment performs a drug spraying operation, compressed air is delivered to the spraying head 101 through the control air path assembly 109, and a drug is delivered to the spraying head 101 through the control liquid path assembly 111, so that the drug can be sprayed out from the outlet 107 under the action of the compressed air. Meanwhile, after the spraying operation is finished, the liquid path assembly 111 can be closed, and the gas path assembly 109 is opened to treat the residual medicine in the spray head 101, so that the residual medicine can be sprayed out of the spray head 101.

In the above process, through the arrangement of the air path assembly 109 and the liquid path assembly 111, the working states of the air path assembly 109 and the liquid path assembly 111 can be independently controlled according to the operation requirements, so that the selection and control of various liquid spraying operation types such as quantitative liquid spraying can be realized, and the controllability of the system can be improved. Meanwhile, the air circuit component 109 is controlled to work independently, the liquid circuit component 111 is closed, and residual liquid in the spray head 101 can be sprayed out, so that the spraying liquid can be effectively saved, the spraying effect is improved, meanwhile, the influence of residual liquid on the spray head 101 is avoided, and the service life of the spray head 101 is prolonged.

To sum up, the embodiment of the utility model provides a negative pressure hydrojet system can be according to the operating condition of operation demand independent control gas circuit subassembly 109 and liquid way subassembly 111 to can realize the selection and the control of multiple hydrojet operation types such as ration hydrojet, and then can improve the controllability that the negative pressure hydrojet provided. Meanwhile, residual liquid in the spray head 101 can be sprayed out by controlling the air path assembly 109 to work alone, so that the liquid spraying effect is improved, and the service life of the spray head 101 is ensured.

The embodiment of the utility model provides an unmanned aerial vehicle, including foretell negative pressure hydrojet system. Therefore, the unmanned equipment has the advantages of strong controllability, good liquid spraying effect, long service life and the like.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (14)

1. A negative pressure type liquid spraying system is characterized by comprising:

the spray head is provided with a cavity, a first inlet, a second inlet and an outlet which are communicated with the cavity;

the air path assembly is communicated with the first inlet and is used for independently and controllably conveying compressed air to the cavity through the first inlet;

and the liquid path assembly is communicated with the second inlet and is used for independently and controllably conveying liquid to the cavity through the second inlet, so that the liquid can be sprayed out from the outlet under the action of the compressed air.

2. The negative-pressure liquid spraying system of claim 1, wherein:

the air path assembly comprises an air compressor, and the air compressor is communicated with the first inlet and used for generating the compressed air.

3. The negative-pressure liquid spraying system of claim 2, wherein:

the gas circuit subassembly still includes the gas holder, gas holder one end with the air compressor machine intercommunication is used for keeping in compressed air, the other end of gas holder with the first import intercommunication of shower nozzle is used for to the shower nozzle carries compressed air.

4. The negative-pressure liquid spraying system according to claim 3, wherein:

the air path component further comprises a first one-way valve arranged between the air compressor and the air storage tank, and the first one-way valve is used for preventing air in the air storage tank from flowing back to the air compressor.

5. The negative-pressure liquid spraying system according to claim 3, wherein:

the gas circuit component also comprises a pressure sensor and an automatic stop switch;

the pressure sensor is arranged in the gas storage tank and is used for detecting the gas pressure in the gas storage tank; the automatic stop switch is electrically connected with the pressure sensor and the air compressor, and is configured to control the air compressor to be turned off when the detection value of the pressure sensor is higher than a first preset value.

6. The negative-pressure liquid spraying system according to claim 3, wherein:

the gas circuit component further comprises a pressure release valve arranged on the gas storage tank, the pressure release valve is provided with a gas release channel, and the pressure release valve is configured to open the gas release channel to release gas when the pressure in the gas storage tank is higher than a second preset value.

7. The negative-pressure liquid spraying system according to claim 3, wherein:

the air path assembly further comprises a pressure regulating valve, the pressure regulating valve is arranged between the air storage tank and the first inlet, and the pressure regulating valve is used for regulating the output pressure of the compressed air output by the air storage tank.

8. The negative-pressure liquid spraying system according to claim 3, wherein:

the gas circuit assembly further includes a manifold forming a plurality of branches, each branch connected between the gas reservoir and the first inlet of one of the spray heads.

9. The negative-pressure liquid spraying system of claim 8, wherein:

the confluence piece comprises a confluence plate, the confluence plate is provided with an air inlet and a plurality of air outlets communicated with the air inlet, and the air inlet and each air outlet form a branch.

10. The negative-pressure liquid spraying system of claim 9, wherein:

the confluence plate is also provided with an air leakage port corresponding to each air outlet;

the piece that converges still includes a plurality of solenoid valves, every solenoid valve all set up in one the gas outlet with between the mouth that loses heart that the gas outlet corresponds, and with one the shower nozzle first import intercommunication.

11. The negative-pressure liquid spraying system according to any one of claims 1 to 10, wherein:

the liquid path assembly comprises a liquid tank, and the liquid tank is communicated with the second inlet.

12. The negative-pressure liquid spraying system of claim 11, wherein:

the liquid path assembly further comprises a second one-way valve, and the second one-way valve is arranged between the liquid tank and the second inlet and is used for preventing liquid from flowing back to the liquid tank.

13. The negative-pressure liquid spraying system of claim 11, wherein:

the liquid path assembly further comprises a liquid flow on-off valve which is arranged between the liquid tank and the second inlet and is used for selectively cutting off or communicating a passage between the liquid tank and the second inlet.

14. An unmanned aerial vehicle comprising the negative pressure liquid jet system of any one of claims 1 to 13.

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