An ejector spray device and an ejector spray boom sprayer

Abstract

The application discloses an ejecting spray device and an ejecting spray rod sprayer. The ejecting spray device comprises an outer shell, an inner shell arranged inside the outer shell and coaxially with the outer shell, a fan assembly arranged on the inner shell, and a ring-shaped pipeline arranged outside the outer shell and used for conveying liquid medicine. A liquid inlet is arranged on the ring-shaped pipeline. An air flow channel is formed between the outer shell and the inner shell. A plurality of connecting pipes are arranged between the ring-shaped pipeline and the outer shell. One end of each connecting pipe is communicated with the ring-shaped pipeline, and the other end of each connecting pipe is communicated with the air flow channel. The ejecting spray device uses a jet flow mode, uses a siphon principle to send the liquid medicine into the air flow channel and violently atomizes the liquid medicine, improves the uniformity of the atomized liquid medicine, and does not cause blockage. High-speed air flow is blown out in the air flow channel to atomize the liquid medicine, so that the atomized liquid medicine has strong penetration.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of spray technology, in particular to an ejector spray device and an ejector spray boom sprayer. BACKGROUND

[0002] The existing spray boom sprayer mainly adopts a medicine tank-pump-nozzle mode, the nozzle is installed on the spray boom, the liquid medicine in the medicine tank is pressurized by the pump and sprayed from the nozzle, during the process of spraying the liquid medicine, the undissolved particulate matter (such as fertilizer and medicine particles) is easy to cause the nozzle to be blocked, and the nozzle is corroded. In addition, after the liquid medicine passes through the nozzle, the droplet particle size distribution of the pure liquid force atomization is extremely uneven, and the momentum of the atomized droplets is very small, which cannot uniformly cover the crops; and the liquid medicine has poor penetration, only 50% of the liquid medicine sprayed from the nozzle is deposited on the target leaves, and most of it is lost in the form of volatilization, drift, etc., so that the growth, pest control and disease prevention of crops cannot achieve the expected effect. SUMMARY

[0003] The present application aims to overcome the above-mentioned problems, and provides an ejector spray device, which uses the jet flow mode, uses the siphon principle to send the liquid medicine into the airflow duct and atomizes it violently, improves the uniformity of droplet distribution, and the ejector spray device will not cause the problem of blockage; in addition, the liquid medicine is atomized by blowing high-speed airflow in the airflow duct, therefore, the droplets sprayed from the airflow duct have strong penetration, which can improve the utilization rate of the liquid medicine and make the growth, pest control and disease prevention of crops achieve the expected effect.

[0004] Another object of the present application is to provide an ejector spray boom sprayer.

[0005] The object of the present application is achieved by the following technical solutions:

[0006] An ejector spray device, comprising an outer shell, an inner shell arranged inside the outer shell and coaxially arranged with the outer shell, a fan assembly arranged on the inner shell, and an annular pipeline arranged outside the outer shell for conveying liquid medicine; wherein,

[0007] The annular pipeline is provided with a liquid inlet; a passage between the outer shell and the inner shell forms an airflow duct; a plurality of connecting pipes are arranged between the annular pipeline and the outer shell; one end of each connecting pipe is in communication with the annular pipeline, and the other end of each connecting pipe is in communication with the airflow duct.

[0008] The working principle of the above-mentioned ejector spray device is as follows:

[0009] In operation, the fan assembly compresses external air to generate air pressure to push air flow from the inlet of the airflow duct to the outlet of the airflow duct, the airflow forms a high-speed airflow field in the airflow duct, and the air pressure of the airflow duct decreases, the liquid medicine enters the connecting pipe from the annular pipe under the action of atmospheric pressure, and then is pressed into the airflow duct from the connecting pipe, the liquid medicine is severely atomized through the high-speed airflow field, and the atomized liquid medicine is sprayed from the outlet of the airflow duct to complete the spraying work.

[0010] In a preferred scheme of the present application, the airflow duct comprises a jet duct at the front end, a narrow duct at the middle part, and a spraying duct at the rear end; the minimum cross-sectional area of the narrow duct is smaller than the minimum cross-sectional areas of the jet duct and the spraying duct; the fan assembly is located in the jet duct, and the connecting pipe is in communication with the narrow duct. In the above structure, the jet duct, the narrow duct, and the spraying duct are sequentially communicated; the fan assembly compresses external air to generate air pressure to sequentially transport air flow from the jet duct to the narrow duct and the spraying duct, and the liquid medicine is atomized into liquid droplets in the narrow duct and then sprayed from the spraying duct to the spraying target; by arranging the narrow duct, when the airflow in the airflow duct passes through the narrow duct, the minimum cross-sectional area of the narrow duct is smaller than the minimum cross-sectional areas of the jet duct and the spraying duct, so that the flow rate of the airflow increases and the pressure decreases when the airflow passes through the narrow duct, the liquid medicine in the connecting pipe is further pressed into the narrow duct to be severely atomized to form liquid droplets, the jet cross section (the cross section of the airflow duct) continuously expands after the liquid droplets pass through the narrow duct, the flow rate continuously decreases, a certain velocity gradient is formed, the liquid droplets diffuse in the airflow duct, the flow rate increases along the path, and the uniformity of the liquid droplet distribution is improved; finally, the liquid droplets are sprayed from the outlet of the spraying duct; by arranging the narrow duct, the atomization effect of the liquid medicine can be further improved.

[0011] Preferably, the middle part of the outer shell body is provided with a recessed arc-shaped part recessed inwardly; the inner shell body is provided with a protruding arc-shaped part protruding outwardly at a position corresponding to the recessed arc-shaped part; and the space between the recessed arc-shaped part and the protruding arc-shaped part constitutes the narrow duct. The purpose is to better guide the airflow by arranging the recessed arc-shaped part and the protruding arc-shaped part.

[0012] Preferably, a plurality of communication holes are arranged on the recessed arc-shaped part, and the plurality of communication holes are arranged one-to-one corresponding to the plurality of connecting pipes; one end of the communication hole is in communication with the connecting pipe, and the other end is in communication with the narrow duct. By arranging the communication holes, it is ensured that the liquid medicine in the connecting pipe can enter the narrow duct through the communication holes to realize the atomization effect of the high-speed airflow on the liquid medicine.

[0013] Preferably, the annular pipeline is coaxially arranged with the outer shell body, and the plurality of connecting pipes are uniformly distributed along the circumferential direction. The purpose of adopting the above structure is to further improve the uniformity of the liquid medicine atomization and ensure that the liquid medicine is more uniformly atomized in the narrow channel.

[0014] Preferably, the fan assembly comprises a pump wheel at the front end of the inner shell body and a motor arranged inside the inner shell body for driving the pump wheel to rotate. Through the arrangement of the above structure, during operation, the motor drives the pump wheel to rotate at high speed, and the high-speed rotating pump wheel compresses the external air to generate air pressure to push the airflow through the airflow channel.

[0015] Preferably, the front end of the airflow channel is provided with an inlet for external gas to enter the airflow channel, and the rear end of the airflow channel is provided with an outlet for the atomized liquid medicine to be sprayed; the diameter of the inlet is smaller than that of the outlet. In the above structure, the small diameter of the inlet is beneficial to the pump wheel to suck and compress the external airflow, and the pressurized airflow passes through the narrow channel, which can improve the atomization effect.

[0016] An ejector spray boom sprayer comprises a vehicle body provided with a power driving system and an ejector spraying system arranged on the vehicle body; the ejector spraying system comprises a liquid tank for storing liquid medicine, a support arranged on the vehicle body, a spray boom assembly arranged on the support, and a plurality of ejector spraying devices arranged on the spray boom assembly; wherein the number of the ejector spraying devices is multiple; the plurality of ejector spraying devices are arranged along the length direction of the spray boom assembly; a liquid pipeline is arranged between each ejector spraying device and the liquid tank; one end of the liquid pipeline is in communication with the liquid pipeline, and the other end of the liquid pipeline is in communication with the liquid inlet. The above ejector spray boom sprayer uses atmospheric pressure difference to suck liquid from the liquid tank, uses high-speed airflow to impact the liquid, and improves the atomization effect.

[0017] During operation of the above ejector spray boom sprayer, the power driving system can drive the vehicle body to move and turn, and in the process of spraying, the liquid medicine in the liquid tank is pressed into the liquid pipeline by atmospheric pressure, enters the connecting pipe after passing through the annular pipeline, and finally enters the narrow channel through the communication hole for violent atomization; since a plurality of ejector spraying devices are arranged, the spraying range can be greatly improved, and the spraying efficiency is improved.

[0018] Preferably, the liquid tank and the liquid pipeline are connected through an electromagnetic valve; and the liquid inlet and the liquid pipeline are connected through a one-way valve. Through the arrangement of the electromagnetic valve, the liquid pipeline can be controlled to be turned on and off; and through the arrangement of the one-way valve, the backflow of gas into the liquid pipeline can be prevented.

[0019] Preferably, the spray rod assembly comprises a first spray rod, a second spray rod and a telescopic connecting rod arranged between the first spray rod and the second spray rod; the support is connected with the first spray rod; one end of the telescopic connecting rod is connected with the first spray rod, and the other end of the telescopic connecting rod is connected with the second spray rod; the ejector spray device is installed on the second spray rod through the fixing clamp. Through the above structure, the fixing clamp can more conveniently install the ejector spray device; the telescopic connecting rod can be telescopic, so that the distance between the first spray rod and the second spray rod can be adjusted, and the flexibility of the ejector spray rod sprayer in the spraying process is further improved.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] 1、The ejector spray device in the present application adopts the jet flow mode to atomize the liquid medicine and spray it out of the outlet of the airflow duct, the high-speed airflow blown in the airflow duct makes the mist droplets have a strong flow rate, ensures that the mist droplets sprayed out of the airflow duct have strong penetration, reduces mist droplet drift, improves target liquid distribution, improves the deposition rate of mist droplets on crops, and further improves the utilization rate of liquid medicine.

[0022] 2、The ejector spray device in the present application compresses external air through the fan assembly to generate wind pressure to push the airflow to blow from the inlet of the airflow duct to the outlet of the airflow duct, the airflow forms a high-speed airflow field in the airflow duct, and the air pressure of the airflow duct decreases, the liquid medicine enters the connecting pipe from the annular pipe under the action of atmospheric pressure, and then is pressed into the airflow duct from the connecting pipe, and the liquid medicine is severely atomized after passing through the high-speed airflow field, thereby improving the atomization effect and the uniformity of mist droplet distribution, and achieving the expected effect of crop growth, pest prevention and disease prevention.

[0023] 3、The ejector spray device in the present application does not have the combination of a water pump and a nozzle of a traditional spray device, utilizes the siphon principle to send the liquid medicine into the airflow duct and severely atomizes the liquid medicine, and does not have the problem of blockage.

[0024] 4、The ejector spray device in the present application is provided with the annular pipe and the plurality of connecting pipes, so that the liquid medicine is more uniformly atomized in the airflow duct, and the uniformity of mist droplet distribution is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figures 1-3 is a structural schematic view of one of the specific embodiments of the ejector spray device in the present application, wherein, Figure 1 is an elevation view, Figure 2 is an elevation view from another perspective, Figure 3 is a bottom view.

[0026] Figures 4-5Structure diagram of the ejector spray device in the present application without the annular pipeline and the connecting rod, Figure 4 is a front view, Figure 5 is a schematic diagram of the internal structure.

[0027] Figure 6 is a front view, Figure 5 is a partial enlarged view at A in the figure.

[0028] Figure 7 Structure diagram of the ejector spray device in the present application without the annular pipeline, the connecting rod and the outer shell.

[0029] Figure 8 Structure diagram of the fan assembly in the present application.

[0030] Figures 9-10 Structure diagram of the ejector spray rod spray machine in the present application, wherein, Figure 9 is a perspective view, Figure 10 is a side view.

[0031] Figure 11 Structure diagram of the ejector spray system in the present application.

[0032] Figure 12 is a front view, Figure 11 is a partial enlarged view at B in the figure.

[0033] Figure 13 Structure diagram of another specific embodiment of the ejector spray rod spray machine in the present application. DETAILED DESCRIPTION

[0034] In order for those skilled in the art to have a better understanding of the technical solutions of the present application, the present application will be further described below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present application are not limited thereto.

[0035] Embodiment 1

[0036] Referring to Figures 1-7 , the present embodiment discloses an ejector spray device, which comprises an outer shell 1, an inner shell 2 arranged inside the outer shell 1 and coaxially arranged with the outer shell 1, a fan assembly 3 arranged on the inner shell 2, and an annular pipeline 4 arranged outside the outer shell 1 for conveying liquid medicine; wherein the annular pipeline 4 is provided with a liquid inlet 5; a passage between the outer shell 1 and the inner shell 2 forms an airflow channel 6; a plurality of connecting pipes 7 are arranged between the annular pipeline 4 and the outer shell 1; one end of each connecting pipe 7 is in communication with the annular pipeline 4, and the other end of each connecting pipe 7 is in communication with the airflow channel 6.

[0037] Referring to Figures 1-7In the embodiment, the liquid medicine is sent into the airflow duct 6 and is severely atomized by using the siphon principle in the form of jet flow, which improves the uniformity of the mist droplet distribution, and the injection spray device does not have the problem of blockage. In addition, the liquid medicine is atomized by blowing high-speed airflow in the airflow duct 6, so that the mist droplets sprayed from the airflow duct 6 have strong penetration, which can improve the utilization rate of the liquid medicine and make the growth, pest prevention and disease prevention of crops achieve the expected effect.

[0038] Referring to Figure 2 and Figures 5-6 , the airflow duct 6 includes a jet duct 6-1 at the front end, a narrow duct 6-2 at the middle part, and a spray duct 6-3 at the rear end; the minimum cross-sectional area of the narrow duct 6-2 is smaller than the minimum cross-sectional areas of the jet duct 6-1 and the spray duct 6-3; the fan assembly 3 is located in the jet duct 6-1, and the connecting pipe 7 communicates with the narrow duct 6-2. In the above structure, the jet duct 6-1, the narrow duct 6-2 and the spray duct 6-3 are sequentially communicated; the fan assembly 3 compresses the external air to generate wind pressure to push the airflow to be sequentially conveyed from the jet duct 6-1 to the narrow duct 6-2 and the spray duct 6-3, and the liquid medicine is atomized into droplets in the narrow duct 6-2 and then sprayed from the spray duct 6-3 to reach the spraying target; by arranging the narrow duct 6-2, when the airflow in the airflow duct 6 passes through the narrow duct 6-2, the flow rate of the airflow increases and the pressure decreases due to the fact that the minimum cross-sectional area of the narrow duct 6-2 is smaller than the minimum cross-sectional areas of the jet duct 6-1 and the spray duct 6-3, so that the liquid medicine in the connecting pipe 7 is further pressed into the narrow duct 6-2 to be severely atomized to form mist droplets. After the mist droplets pass through the narrow duct 6-2, the jet flow cross section (the cross section of the airflow duct 6) continuously expands, the flow rate continuously decreases, a certain velocity gradient is formed, the mist droplets diffuse in the airflow duct 6, the flow rate increases along the way, and the uniformity of the mist droplet distribution is improved. Finally, the mist droplets are sprayed from the outlet 12 of the spray duct 6-3. By arranging the narrow duct 6-2, the atomization effect of the liquid medicine can be further improved.

[0039] Referring to Figure 5 and Figure 6 , the cross-sectional area of the rear end of the spray duct 6-3 gradually increases, which aims to facilitate the diffusion of the mist droplets and improve the uniformity of the mist droplet distribution.

[0040] Referring to Figures 4-7The middle part of the outer shell 1 is provided with a recessed arc-shaped part 8 which is recessed inwardly; the inner shell 2 is provided with a protruding arc-shaped part 9 which is protruded outwardly at the position corresponding to the recessed arc-shaped part 8; the space between the recessed arc-shaped part 8 and the protruding arc-shaped part 9 constitutes the narrow channel 6-2. The purpose is to guide the airflow better by setting the recessed arc-shaped part 8 and the protruding arc-shaped part 9. Since the recessed arc-shaped part 8 and the protruding arc-shaped part 9 are both arc-shaped, the cross-sectional area of the front end of the narrow channel 6-2 gradually decreases backwardly, and the cross-sectional area of the rear end gradually increases backwardly, which facilitates the atomization and delivery of the liquid medicine.

[0041] Specifically, the recessed arc-shaped part 8 and the protruding arc-shaped part 9 both extend along the circumferential direction.

[0042] Referring to Figures 1-7 The recessed arc-shaped part 8 is provided with a plurality of communication holes 10, and the plurality of communication holes 10 are arranged one-to-one corresponding to the plurality of connecting pipes 7; one end of the communication hole 10 is communicated with the connecting pipe 7, and the other end is communicated with the narrow channel 6-2. By setting the communication hole 10, it is ensured that the liquid medicine in the connecting pipe 7 can enter the narrow channel 6-2 through the communication hole 10, and the atomization effect of the high-speed airflow on the liquid medicine is realized.

[0043] The communication hole 10 is arranged at the narrowest position corresponding to the narrow channel 6-2. The purpose is to correspond to the highest gas flow rate at the narrowest position, which can improve the atomization effect.

[0044] Referring to Figures 1-3 The annular pipeline 4 is coaxially arranged with the outer shell 1, and the plurality of connecting pipes 7 are uniformly distributed along the circumferential direction, and the plurality of communication holes 10 are also uniformly distributed along the circumferential direction. The purpose of adopting the above structure is to further improve the uniformity of the liquid medicine atomization, and to ensure that the liquid medicine is more uniformly atomized in the narrow channel 6-2.

[0045] Referring to Figures 1-6 The number of the communication holes 10 is 8, and the number of the connecting pipes 7 is also 8.

[0046] Referring to Figures 5-8 The fan assembly 3 includes a pump wheel 3-1 at the front end of the inner shell 2 and a motor 3-2 arranged inside the inner shell 2 for driving the pump wheel 3-1 to rotate. By setting the above structure, during operation, the motor 3-2 drives the pump wheel 3-1 to rotate at high speed, and the high-speed rotating pump wheel 3-1 compresses the external air to generate wind pressure to push the airflow through the airflow channel 6.

[0047] Referring to Figures 1-6The front end of the airflow duct 6 is provided with an inlet 11 for external gas to enter the airflow duct 6, and the rear end of the airflow duct 6 is provided with an outlet 12 for the atomized liquid medicine to be sprayed out; the diameter of the inlet 11 is smaller than that of the outlet 12. Specifically, the minimum diameter of the inlet 11 is smaller than that of the outlet 12. In the above structure, the small diameter of the inlet 11 is conducive to the pumping wheel 3-1 to suck in and compress the external airflow, and the pressurized airflow can pass through the narrow airflow duct 6-2 to improve the atomization effect.

[0048] Referring to Figures 1-6 The inlet 11 is an arc-shaped converging inlet, and the caliber of the arc-shaped converging inlet gradually expands towards the flow direction of the airflow, which is conducive to the pumping wheel 3-1 to suck in and compress the external airflow, and the efficiency of the pressurized airflow passing through the narrow airflow duct 6-2 will be higher.

[0049] Referring to Figures 5-7 The rear end of the inner shell 2 gradually shrinks towards the center until it is completely closed, that is, the shape of the rear end of the inner shell 2 is similar to the tail of a bee, and specifically, the rear end of the inner shell 2 is a conical shell with a circular arc-shaped side surface. The purpose is to facilitate the movement of the mist droplets and improve the diffusion effect of the mist droplets, while also ensuring the sealing of the inner shell 2 to prevent the liquid medicine from entering the inner shell 2 and causing damage to the motor 3-2.

[0050] Referring to Figures 5-7 A plurality of groups of first support connecting rods 13 are arranged between the inner shell 2 and the outer shell 1, and the number of first support connecting rods 13 in each group is multiple, and the multiple first support connecting rods 13 are uniformly distributed along the circumferential direction; one end of the first support connecting rod 13 is fixedly connected with the inner wall of the outer shell 1, and the other end is connected with the outer wall of the inner shell 2. By arranging the first support connecting rod 13, the fixing of the inner shell 2 and the outer shell 1 is facilitated.

[0051] Referring to Figures 5-7 The first support connecting rod 13 is arranged in two groups along the axis direction of the outer shell 1, and the number of first support connecting rods 13 in each group is four.

[0052] Referring to Figures 5-6 and Figure 8 A plurality of groups of second support connecting rods 14 are arranged between the motor 3-2 and the inner shell 2, and the number of second support connecting rods 14 in each group is multiple, and the multiple second support connecting rods 14 are uniformly distributed along the circumferential direction; one end of the second support connecting rod 14 is fixedly connected with the motor 3-2, and the other end is fixedly connected with the inner wall of the inner shell 2. By arranging the second support connecting rod 14, the installation and fixing of the motor 3-2 are facilitated.

[0053] Referring to Figures 5-6 and Figure 8The second support connecting rod 14 is arranged in two groups along the axial direction of the outer shell 1, and the number of the second support connecting rod 14 in each group is four.

[0054] Referring to Figures 1-7 The working principle of the above-mentioned ejector spray device is as follows:

[0055] In operation, the fan assembly 3 compresses the external air to generate wind pressure to push the airflow to blow from the inlet 11 of the airflow duct 6 to the outlet 12 of the airflow duct 6. The airflow forms a high-speed airflow field in the airflow duct 6, and the air pressure of the airflow duct 6 decreases. The liquid medicine enters the connecting pipe 7 from the annular pipe 4 under the action of the atmospheric pressure, and then is pressed into the airflow duct 6 from the connecting pipe 7. The liquid medicine is subjected to severe atomization through the high-speed airflow field, and is sprayed out of the outlet 12 of the airflow duct 6. The mist droplets reach the spraying target to complete the spraying work.

[0056] Embodiment 2

[0057] Referring to Figures 9-11 The embodiment discloses an ejector spray boom sprayer, which comprises a vehicle body 15 provided with a power driving system and an ejector spray system arranged on the vehicle body 15. The ejector spray system comprises a liquid medicine tank 16 for storing liquid medicine, a support 17 arranged on the vehicle body 15, a spray boom assembly 18 arranged on the support 17, and the ejector spray device 19 arranged on the spray boom assembly 18 and as described in Embodiment 1. The number of the ejector spray device 19 is multiple. The multiple ejector spray devices 19 are arranged along the length direction of the spray boom assembly 18. The liquid pipe 20 is arranged between each ejector spray device 19 and the liquid medicine tank 16. One end of the liquid pipe 20 is in communication with the liquid pipe 20, and the other end of the liquid pipe 20 is in communication with the liquid inlet 5. The above-mentioned ejector spray boom sprayer uses the atmospheric pressure difference to suck the liquid from the liquid medicine tank 16, and uses the high-speed airflow to impact the liquid to improve the atomization effect.

[0058] Referring to Figures 9-11 In operation, the power driving system can drive the vehicle body 15 to walk and turn. In the spraying process, the liquid medicine in the liquid medicine tank 16 is pressed into the liquid pipe 20 by the atmospheric pressure, enters the connecting pipe 7 after passing through the annular pipe 4, and finally enters the narrow airflow duct 6-2 to be subjected to severe atomization through the communication hole 10. Since multiple ejector spray devices are arranged, the spraying range can be greatly improved, and the spraying efficiency is improved.

[0059] Referring to Figures 9-11 The support 17 is a triangular support, and the support 17 is fixed on the chassis of the vehicle body 15 by bolts. The liquid medicine tank 16 is arranged on the vehicle body 15 and located directly above the support 17.

[0060] Referring toFigures 9-11 The medicine box 16 is connected with the liquid pipeline 20 through an electromagnetic valve; the liquid inlet 5 is connected with the liquid pipeline 20 through a one-way valve. By setting the electromagnetic valve, the liquid pipeline 20 can be controlled to be turned on or off; by setting the one-way valve, the gas can be prevented from flowing back into the liquid pipeline 20.

[0061] Referring to Figure 11 A plurality of air holes 16-1 with a diameter of 6 mm are distributed on the top of the medicine box 16, and a plurality of water outlets are arranged on the side of the medicine box 16, each of which is connected with the input end of each electromagnetic valve in one-to-one correspondence.

[0062] Referring to Figures 11-12 The spray rod assembly 18 is used for mounting the ejector spray device 19, and the spray rod assembly 18 comprises a first spray rod 18-1, a second spray rod 18-2, and a telescopic connecting rod 18-3 arranged between the first spray rod 18-1 and the second spray rod 18-2; the support 17 is connected with the first spray rod 18-1; one end of the telescopic connecting rod 18-3 is connected with the first spray rod 18-1, and the other end of the telescopic connecting rod 18-3 is connected with the second spray rod 18-2; the ejector spray device 19 is mounted on the second spray rod 18-2 through a fixing clamp 21, wherein a plurality of telescopic connecting rods 18-3 are arranged, and the plurality of telescopic connecting rods 18-3 are arranged along the length direction of the first spray rod 18-1. In the above structure, the fixing clamp 21 locks the ejector spray device 19 through bolts, and the fixing clamp 21 can more conveniently mount the ejector spray device 19; the telescopic connecting rod 18-3 can be telescopic, so that the distance between the first spray rod 18-1 and the second spray rod 18-2 can be adjusted, and the flexibility of the ejector spray rod spraying machine in the spraying process is further improved.

[0063] Referring to Figures 9-11 The number of the ejector spray devices 19 is five, and by setting the above structure, the working range of the ejector spray rod spraying machine can be improved, and the working efficiency is further improved.

[0064] Embodiment 3

[0065] Referring to Figure 12 The other structures in the embodiment are the same as those in Embodiment 2, and the difference lies in that the support 17 is hinged with the vehicle body 15, and a telescopic mechanism 22 is arranged between the vehicle body 15 and the support 17, the telescopic mechanism 22 is used for driving the support 17 to swing on the vehicle body 15, so as to adjust the position of the support 17, and further adjust the height of the ejector spray device, and the flexibility of the spraying operation is improved.

[0066] The telescopic mechanism 22 can be a hydraulic rod, one end of the hydraulic rod is hinged on the vehicle body 15, and the other end is hinged on the middle part of the support 17.

[0067] The above is the preferred embodiment of the present application, but the embodiments of the present application are not limited by the above, and any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present application should be equivalent replacement methods, and are included in the protection scope of the present application.

Claims

1. A jet spray device, characterized in that: It comprises an outer shell, an inner shell arranged inside the outer shell and coaxially arranged with the outer shell, a fan assembly arranged on the inner shell, and an annular pipe arranged outside the outer shell for conveying liquid medicine; wherein, The annular pipe is provided with a liquid inlet; the passage between the outer shell and the inner shell forms an airflow duct; a plurality of connecting pipes are provided between the annular pipe and the outer shell; one end of each connecting pipe is connected to the annular pipe, and the other end of each connecting pipe is connected to the airflow duct; The airflow duct includes an air jet duct at the front end, a narrow duct at the middle, and a spray duct at the rear end; the minimum cross-sectional area of ​​the narrow duct is smaller than the minimum cross-sectional areas of the air jet duct and the spray duct; wherein the fan assembly is located in the air jet duct, and the connecting pipe is connected to the narrow duct; The outer shell is provided with an inwardly concave arc portion in the middle; the inner shell is provided with an outwardly convex arc portion at a position corresponding to the concave arc portion; the space between the concave arc portion and the convex arc portion constitutes the narrow duct; The concave arc-shaped portion is provided with a plurality of communication holes, and the plurality of communication holes are provided in a one-to-one correspondence with the plurality of connecting pipes; one end of the communication hole is connected to the connecting pipe, and the other end is connected to the narrow duct; The annular pipe is coaxially arranged with the outer shell, and the plurality of connecting pipes are evenly distributed along the circumferential direction; The fan assembly includes a pump wheel at the front end of the inner shell and a motor arranged inside the inner shell for driving the pump wheel to rotate; The front end of the airflow duct is provided with an inlet for external gas to enter the airflow duct, and the rear end of the airflow duct is provided with an outlet for spraying the atomized liquid medicine; the diameter of the inlet is smaller than the diameter of the outlet.

2. A boom sprayer, characterized in that: It comprises a vehicle body equipped with a power drive system and an induced spray system arranged on the vehicle body; the induced spray system comprises a medicine box for storing liquid medicine, a bracket arranged on the vehicle body, a spray rod assembly arranged on the bracket, and an induced spray device as claimed in claim 1 arranged on the spray rod assembly; wherein, there are multiple induced spray devices; the multiple induced spray devices are arranged along the length direction of the spray rod assembly; a liquid pipe is provided between each of the induced spray devices and the medicine box; one end of the liquid pipe is connected to the medicine box, and the other end of the liquid pipe is connected to the liquid inlet.

3. A boom sprayer according to claim 2, characterized in that: The medicine box is connected to the liquid pipeline via a solenoid valve; the liquid inlet is connected to the liquid pipeline via a one-way valve.

4. The ejector boom sprayer according to claim 2, characterized in that: The spray boom assembly includes a first spray boom, a second spray boom, and a telescopic connecting rod arranged between the first spray boom and the second spray boom; the bracket is connected to the first spray boom; one end of the telescopic connecting rod is connected to the first spray boom, and the other end of the telescopic connecting rod is connected to the second spray boom; the ejector spray device is mounted on the second spray boom via a fixing clamp.

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