CN216533419U - Towed boom sprayer - Google Patents

Abstract

A traction type boom sprayer comprises a frame, a main medicine box arranged on the frame and a plurality of wheels uniformly distributed below the frame, wherein a hand washing box and a cleaning box positioned on the front side of the hand washing box are arranged on the front side of the main medicine box; the left side and the right side of the rear end of the frame are respectively hinged with a spray arm; a bidirectional damping mechanism is arranged between the frame and the spray arm; the spray arm is provided with a plurality of spray rods which are uniformly distributed, and the spray rods are provided with a plurality of anti-drip valves which are uniformly distributed; the frame is provided with an accurate pressure-stabilizing distribution valve; a plurality of water outlet connectors on the precise pressure-stabilizing distribution valve are respectively connected with the corresponding spray rods; a diaphragm pump is arranged on the frame; the diaphragm pump is connected with an external water adding assembly. The traction type boom sprayer disclosed by the utility model can be used for accurately spraying, improving the spraying operation efficiency, facilitating the cleaning of the whole pipeline and the medicine box of the boom sprayer, improving the medicine liquid adding efficiency and avoiding the situation that medicine liquid is remained in a medicine bottle.

Description

Towed boom sprayer

Technical Field

The utility model relates to a spraying machine, in particular to a traction type boom spraying machine.

Background

The boom sprayer is a motor-driven sprayer which installs the spray head on a transverse boom or a vertical boom, the boom sprayer is short of spray standard setting and waterway system standardized configuration, the amount of the pesticide sprayed in unit area during operation is determined according to habits of different operators, the prevention and treatment effect is seriously influenced, a large amount of pesticide liquid is wasted, and meanwhile, environmental transition pollution such as soil is caused, and accurate spraying cannot be achieved.

The traditional boom sprayer has the advantages that the boom assembly is simple in structure and lacks of the important foundation of boom design, which is derived from the computer simulation theory and calculated scientifically through engineering mechanics, for the operation environment, the boom of the boom sprayer can only be made into a small boom, even if the somewhat larger boom is easy to bend or even break in the actual farm work condition, the service life of the whole machine is seriously influenced, and meanwhile, the improvement of the spraying operation efficiency of the whole machine is seriously restricted due to the limitation of upward extension of the boom.

Traditional boom sprayer only disposes the medical kit and lacks special washing case and hand washing case, can't wash whole pipeline of boom sprayer and medical kit, leads to the liquid medicine to change the trouble, and the condition that the pipeline blockked up easily appears.

Traditional boom sprayer adds the liquid medicine and directly pours into through in to the medical kit, and this kind of mode of pouring into is not only very slow, takes a lot of work and time, easily causes in the medicine bottle in addition to have partial remaining, leads to utilization ratio reduction and cost-push, brings the pollution of environment simultaneously.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a traction type boom sprayer, which can not only spray accurately and improve the spraying operation efficiency, but also is convenient for cleaning the whole pipeline and a medicine box of the boom sprayer, and can improve the medicine liquid adding efficiency and avoid the situation that medicine liquid is remained in a medicine bottle.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model discloses a traction type boom sprayer, which comprises a frame, a main medicine box arranged on the frame and a plurality of wheels uniformly distributed below the frame, and is characterized in that: a hand washing box and a cleaning box positioned on the front side of the hand washing box are arranged on the front side of the main medicine box; the upper surface of the hand washing box is provided with a sealing opening which is screwed with a sealing cover; the rear end of the frame is provided with a middle spray arm, and the left side and the right side of the middle spray arm are respectively hinged with a side spray arm; a bidirectional damping mechanism is arranged between the frame and the side spray arm; the side spray arm is provided with a plurality of spray rods which are uniformly distributed, and the spray rods are provided with a plurality of anti-drip valves which are uniformly distributed; the frame is provided with an accurate pressure-stabilizing distribution valve; a plurality of water outlet connectors on the precise pressure-stabilizing distribution valve are respectively connected with the corresponding spray rods; a diaphragm pump is arranged on the frame; the diaphragm pump is connected with an external water adding component; a five-way distribution valve connected with the diaphragm pump is arranged on the frame and is simultaneously connected with the main medicine box and the cleaning box; a medicine mixing box matched with the main medicine box is arranged on the right side of the frame; and the frame is provided with a microcomputer controller matched with the accurate pressure-stabilizing distribution valve.

The diaphragm pump is connected with a manual three-way pressure regulating valve matched with the diaphragm pump; the inner wall of the upper side of the main medicine box is provided with a cleaning spray head; the cleaning spray head is connected with a manual three-way pressure regulating valve through a pipeline; and a stirring spray head connected with a manual three-way pressure regulating valve is arranged below the inner wall of the rear side of the main medicine box.

The medicine mixing box comprises a box body arranged on the right side of the main medicine box, and a box cover is covered on an opening at the upper end of the box body; a cleaning spray head is arranged at the center of the lower surface of the box cover; a water outlet valve group is arranged on the outer wall of the rear side of the box body; the left end of the water outlet valve group is provided with a water inlet joint, and the right end of the water outlet valve group is connected with the Venturi water absorber through a water pipe; a partition plate is arranged in the lower part of the box body; a water through hole is formed in the center of the partition plate; a filter screen matched with the limber hole is arranged in the limber hole; the outer wall of the right side of the lower end of the box body is provided with a water outlet valve communicated with the Venturi water absorber, and a space formed by enclosing the partition board and the inner wall of the lower end of the box body is communicated with the water outlet valve; the inner wall of the right side of the box body is provided with a mounting seat; the mounting seat is provided with a liquid medicine washing nozzle matched with the mounting seat; the inner wall of the left side of the box body is provided with a powder washing nozzle, and the powder washing nozzle and the liquid medicine washing nozzle are both positioned above the partition plate.

The water outlet valve group comprises a powder flushing nozzle control valve, a cleaning nozzle control valve and a liquid medicine flushing nozzle control valve; the powder washing nozzle control valve is connected with the powder washing nozzle through a first hose; the cleaning spray head control valve is connected with the cleaning spray head through a second hose; the control valve of the liquid medicine flushing nozzle is connected with the liquid medicine flushing nozzle through a third hose; the outer wall of the lower part of the liquid medicine washing nozzle is provided with a supporting plate.

The bidirectional damping mechanism comprises a damping frame arranged on the middle spray arm; the left side and the right side of the shock absorption frame are both provided with a shock absorption welding seat, the middle part of the shock absorption welding seat on the left side is provided with a left guide sleeve, and the middle part of the shock absorption welding seat on the right side is provided with a right guide sleeve coaxial with the left guide sleeve; a damping central shaft passes through the left guide sleeve and the right guide sleeve; an oil cylinder is arranged at one end of the side spray arm, which is close to the middle spray arm; the end part of one end of the oil cylinder, which is adjacent to the middle spray arm, is hinged with the damping central shaft; the outer wall of the right part of the damping central shaft is provided with an annular right limiting step, and the right limiting step is coplanar with the left end face of the right guide sleeve; a right gasket which is attached to the left end face of the right limiting step and the left end face of the right guide sleeve is sleeved outside the damping central shaft; a fine adjustment fixing sleeve is screwed in the left guide sleeve, and the length of the fine adjustment fixing sleeve is greater than that of the left guide sleeve; a damping spring flange seat sleeved outside the damping central shaft is arranged between the fine-tuning fixing sleeve and the left part of the damping central shaft; a pressing plate attached to the right end face of the fine adjustment fixing sleeve extends outwards from the right end of the damping spring flange seat; a damping spring sleeved outside the damping central shaft is arranged between the pressure plate and the right gasket; and the left end of the damping central shaft is provided with a reverse pushing device matched with the damping spring flange seat.

The reverse pushing device comprises a left limiting step arranged at the left end of the damping central shaft, and the left limiting step is coplanar with the left end surface of the damping spring flange seat; the damping central shaft is externally sleeved with a left gasket which is attached to the left limiting step and the left end face of the damping spring flange seat; the left end of the damping central shaft is in threaded connection with a limit nut which is attached to the left side wall of the left gasket; the outer diameter of the limiting nut and the outer diameter of the left gasket are both smaller than the inner diameter of the fine-tuning fixing sleeve.

An external link component is arranged outside the side spray arm; a fixed arm is arranged on the upper side of the inner end of the external link part; the fixed arm is provided with a rotating shaft; a limiting arm positioned below the fixed arm is arranged on the upper side of the outer end of the side spraying arm; the limiting arm is provided with a rotating hole coaxial with the rotating shaft; the rotating shaft penetrates through the rotating hole and is positioned between the side spray arm and the external link component; a lower half block is arranged at the lower end of the rotating shaft; the center of the lower half block is provided with a lower through hole which axially penetrates through the lower half block, and the rotating shaft penetrates through the lower through hole; the lower surface of the lower half block is provided with a limiting structure; an upper half block coaxial with the lower half block is arranged above the lower half block; an upper through hole which axially penetrates through the upper half block is formed in the center of the upper half block, and the rotating shaft penetrates through the upper through hole; the rotating shaft is provided with a buffer spring support positioned above the upper half block; a driving structure is arranged on the upper surface of the upper half block; the buffer spring support is connected with the driving structure through a buffer spring sleeved outside the rotating shaft; a groove is formed in the middle of the lower surface of the upper half block; a boss matched with the groove is arranged in the middle of the upper surface of the lower half block; and the lower surface of the upper half block is provided with a spiral rotating structure matched with the boss.

The spiral rotating structure comprises a left spiral curved surface arranged at the right front part and the left rear part of the lower surface of the upper half block; the right rear part and the left front part of the lower surface of the upper half block are provided with a right spiral curved surface; the right spiral curved surface is in transition connection with the adjacent left spiral curved surface through an upper sharp corner profile; outer inclined planes are arranged on the left side wall surface and the right side wall surface of the boss; a lower sharp corner profile is arranged at the center of the upper surface of the boss; the lower sharp corner profile is in transitional connection with the outer inclined surface through a sliding arc surface; inner inclined planes attached to the outer inclined planes are arranged on the inner walls of the left side and the right side of the groove; the inner inclined surface is in transition connection with the lower surface of the upper half block through a sliding-out cambered surface; and a guide surface is arranged in the middle of the sliding-out cambered surface, and the middle of the sliding-out cambered surface is gradually bent towards the contour of the lower sharp corner by the guide surface and is connected with the contour of the lower sharp corner.

The limiting structure comprises a limiting groove arranged on the lower side of the outer end of the side spray arm; a lower clamping groove is formed in the middle of the lower surface of the lower half block; a limiting plate sleeved outside the rotating shaft is arranged below the lower half block, and the inner end of the limiting plate extends into the limiting groove; the upper surface of the limiting plate is provided with a lower clamping block matched with the lower clamping groove; the lower end of the rotating shaft is in threaded connection with an adjusting nut which is attached to the lower surface of the limiting plate.

The driving structure comprises an upper clamping groove arranged in the middle of the upper surface of the upper half block; a driving plate sleeved outside the rotating shaft is arranged above the upper half block and is connected with the buffer spring support through a buffer spring; the lower surface of the driving plate is provided with an upper clamping block matched with the upper clamping groove.

The utility model has the beneficial effects that:

compared with the prior art, the traction type boom sprayer adopting the structure provided by the utility model has the advantages that the independent cleaning box and the independent hand washing box are provided, an operator can clean the whole pipeline and the main medicine box of the boom sprayer at any time due to the cleaning box, the main medicine box can be used for conveniently replacing other liquid medicines after being cleaned, the pipeline can be effectively prevented from being blocked, and therefore, the accurate spraying is effectively ensured and the operation efficiency is improved.

Compared with the prior art, the traction type spray rod spraying machine adopting the structure can achieve the aim of accurately spraying the liquid medicine application amount in unit area all the time through the cooperation between the accurate stable distribution valve and the microcomputer controller, the water outlet connectors on the accurate stable distribution valve are respectively connected with the corresponding spray rods, each water outlet connector is provided with an independent opening and closing valve to control opening and closing, so that different spray rods can be selected to be opened according to actual needs to finish different spraying areas, the pressure is kept unchanged under the condition that other water outlet connectors are closed, accurate spraying can be effectively guaranteed, when the water outlet connectors are all opened, the liquid medicine in the main medicine box uniformly flows into each spray rod through the accurate stable distribution valve, and then is sprayed onto crops through the nozzles of the anti-drip valves to finish spraying operation.

Compared with the prior art, when the damping central shaft of the bidirectional damping mechanism of the traction boom sprayer adopting the structure of the utility model is pulled or pushed by a vibrating component, the damping central shaft can move leftwards or rightwards under the action of external force, no matter the damping central shaft moves leftwards or rightwards, the damping spring can be compressed and generates elasticity, the elasticity of the damping spring can effectively resist the external force, the effect of buffering and damping is achieved, and meanwhile, the effect of double-line damping is achieved, after the external force is buffered and damped, the pressure born by the vibrated part is larger, thereby effectively realizing the effect of improving the strength, ensuring the service life of the spray arm assembly, therefore, even if the side spray arm with longer length is selected, the side spray arm can not be bent or broken, the length of the side spray arm can be selected between 22 meters and 28 meters, and the spraying operation efficiency is greatly improved.

Compared with the prior art, the traction type boom sprayer adopting the structure can wash the medicine bottle filled with the liquid medicine through the liquid medicine washing nozzle, not only can effectively remove the liquid medicine on the inner wall of the medicine bottle, but also can avoid environmental pollution even if the medicine bottle without residual liquid medicine is discarded, the environment-friendly effect is achieved, the liquid medicine can be washed out of the medicine bottle, the outflow speed of the liquid medicine is increased, the liquid adding efficiency is effectively increased, the powder washing nozzle can play a role in stirring by utilizing the impact force of water flow, the speed of dissolving the powder medicine in water is effectively increased, meanwhile, the powder medicine can be effectively mixed in the water uniformly, and the quality of the liquid medicine is ensured.

Compared with the prior art, the traction type boom sprayer adopting the structure of the utility model has the advantages that the external link component is arranged at the outermost side of the side spray arm, the external link component can replace the side spray arm to collide with the obstacle once encountering the obstacle, the external link component can rotate by taking the rotating shaft as the center through the matching between the upper half block 9 and the lower half block, the flexible anti-collision effect is achieved, the damage caused by the hard collision of the external link component and the obstacle is avoided, the external link component is effectively protected, meanwhile, after the external link component rotates due to the collision, the upper half block can quickly return after rotating under the elastic action of the buffer spring and under the guide of the left spiral curved surface and the right spiral curved surface of the spiral rotating structure, and along with the quick return of the external link component, the spray boom on the external link component and the spray boom on the side spray arm are on the same straight line, thereby effectively guaranteeing the consistency of the boom sprayer during spraying and guaranteeing the spraying quality.

Drawings

FIG. 1 is a perspective view of the trailing boom sprayer of the present invention;

FIG. 2 is a schematic structural view of the trailing boom sprayer of the present invention;

FIG. 3 is an enlarged view of section A of FIG. 2;

FIG. 4 is a top view of the side boom of the trailing boom sprayer of the present invention folded on both the left and right sides;

FIG. 5 is a schematic view of the construction of the mixing box;

fig. 6 is a perspective view of the medicine mixing box with the box cover opened;

FIG. 7 is a schematic view of the structure of the drug vial inverted and sleeved outside the drug solution flushing nozzle;

FIG. 8 is a schematic view of a portion of the pull boom sprayer of the present invention;

fig. 9 is an enlarged view of a portion B of fig. 8;

FIG. 10 is a cross-sectional view of the bi-directional shock absorbing mechanism;

FIG. 11 is a partial schematic view of the side spray arm;

fig. 12 is an enlarged view of the portion C of fig. 11;

FIG. 13 is a schematic view of the configuration of the upper half block with the inner chamfer overlapping the outer chamfer of the lower half block;

FIG. 14 is a schematic view of the structure of the slide-out contour of the upper half block in contact with the slide contour of the lower half block;

FIG. 15 is a schematic view of the configuration of the upper sharp corner profile of the upper half block opposing the lower sharp corner profile of the lower half block;

FIG. 16 is a schematic diagram of the structure of a lower half block;

FIG. 17 is a schematic view of an angled configuration of the up-half block;

FIG. 18 is a schematic view of another angled configuration of the up-half block;

fig. 19 is a schematic view showing the structure of the outer hinge part rotating upon collision with an obstacle.

Detailed Description

The utility model is described in further detail below with reference to the following figures and detailed description:

referring to fig. 1 to 19, the utility model provides a traction boom sprayer, which comprises a frame 1, a main medicine box 2 arranged on the frame 1, and a plurality of wheels 3 uniformly distributed below the frame 1, wherein a hand washing box 4 and a cleaning box 5 positioned at the front side of the hand washing box 4 are arranged at the front side of the main medicine box 2; the upper surface of the hand washing box 4 is provided with a sealing port 55, and the sealing port 55 is screwed with a sealing cover 56; the rear end of the frame 1 is provided with a middle spray arm 58, and the left side and the right side of the middle spray arm 58 are respectively hinged with a side spray arm 6; a bidirectional damping mechanism 7 is arranged between the frame 1 and the side spray arm 6; a plurality of spray rods 8 which are uniformly distributed are arranged on the side spray arm 6, and a plurality of drip-proof valves 9 which are uniformly distributed are arranged on the spray rods 8; the frame 1 is provided with an accurate pressure-stabilizing distribution valve 10; a plurality of water outlet connectors on the precise pressure-stabilizing distribution valve 10 are respectively connected with the corresponding spray rods 8; a diaphragm pump 11 is arranged on the frame; the diaphragm pump 11 is connected with an external water adding assembly 12; the frame 1 is provided with a five-way distribution valve 13 connected with the diaphragm pump 11, and the five-way distribution valve 13 is simultaneously connected with the main medicine box 2 and the cleaning box 5; a medicine mixing box 14 matched with the main medicine box 2 is arranged on the right side of the frame 1; the frame 1 is provided with a microcomputer controller 15 matched with the accurate pressure-stabilizing distribution valve 10.

The diaphragm pump 11 is connected with a manual three-way pressure regulating valve 16 matched with the diaphragm pump; a cleaning spray head 17 is arranged on the inner wall of the upper side of the main medicine box 2; the cleaning spray head 17 is connected with a manual three-way pressure regulating valve 16 through a pipeline; a stirring spray head 18 connected with a manual three-way pressure regulating valve 16 is arranged below the inner wall of the rear side of the main medicine box 2.

The medicine mixing box 14 comprises a box body 19 arranged on the right side of the main medicine box 2, and a box cover 20 is covered on an opening at the upper end of the box body 19; a cleaning spray head 21 is arranged at the center of the lower surface of the box cover 20; a water outlet valve group 22 is arranged on the outer wall of the rear side of the box body 19; the left end of the water outlet valve group 22 is provided with a water inlet connector 23, and the right end of the water outlet valve group 22 is connected with a Venturi water absorber 25 through a water pipe 24; a partition plate 26 is arranged in the lower part of the box body 19; a water through hole 27 is formed in the center of the partition plate 26; a filter screen 28 matched with the water through hole 27 is arranged in the water through hole; the outer wall of the right side of the lower end of the box body 19 is provided with a water outlet valve 29 communicated with the Venturi water absorber 25, and a space formed by enclosing the partition plate 26 and the inner wall of the lower end of the box body 19 is communicated with the water outlet valve 29; the inner wall of the right side of the box body 19 is provided with a mounting seat 30; the mounting seat 30 is provided with a liquid medicine washing nozzle 31 matched with the mounting seat; the inner wall of the left side of the box 19 is provided with a powder washing nozzle 32, and the powder washing nozzle 32 and the liquid medicine washing nozzle 31 are both positioned above the partition 26.

The water outlet valve group 22 comprises a powder flushing nozzle control valve 33, a cleaning nozzle control valve 34 and a liquid medicine flushing nozzle control valve 35; the powder flushing nozzle control valve 33 is connected with the powder flushing nozzle 32 through a first hose 36; the cleaning nozzle control valve 34 is connected with the cleaning nozzle 21 through a second hose 37; the control valve 35 of the liquid medicine flushing nozzle is connected with the liquid medicine flushing nozzle 31 through a third hose 38; the outer wall of the lower part of the liquid medicine washing nozzle 31 is provided with a supporting plate 39.

The bidirectional damping mechanism 7 comprises a damping frame 40 arranged on a middle spray arm 58; the left side and the right side of the shock absorption frame 40 are both provided with a shock absorption welding seat 41, the middle part of the shock absorption welding seat 41 on the left side is provided with a left guide sleeve 42, and the middle part of the shock absorption welding seat 41 on the right side is provided with a right guide sleeve 43 which is coaxial with the left guide sleeve 42; a shock-absorbing central shaft 44 passes through the left guide sleeve 42 and the right guide sleeve 43; an oil cylinder 45 is arranged at one end of the side spray arm 6, which is adjacent to the middle spray arm 58; one end part of the oil cylinder 45, which is close to the middle spray arm 58, is hinged with the damping central shaft 44; the outer wall of the right part of the damping central shaft 44 is provided with an annular right limiting step 46, and the right limiting step 46 is coplanar with the left end surface of the right guide sleeve 43; a right gasket 47 which is attached to the left end faces of the right limiting step 46 and the right guide sleeve 43 is sleeved outside the damping central shaft 44; a fine-tuning fixing sleeve 48 is screwed in the left guide sleeve 42, and the length of the fine-tuning fixing sleeve 48 is greater than that of the left guide sleeve 42; a damping spring flange seat 49 sleeved outside the damping central shaft 44 is arranged between the fine-tuning fixing sleeve 48 and the left part of the damping central shaft 44; a pressing plate 50 which is attached to the right end face of the fine adjustment fixing sleeve 48 extends outwards from the right end of the damping spring flange seat 49; a damping spring 51 sleeved outside the damping central shaft 44 is arranged between the pressure plate 50 and the right gasket 47; the left end of the damping central shaft 44 is provided with a reverse pushing device matched with a damping spring flange seat 49.

The reverse pushing device comprises a left limiting step 52 arranged at the left end of the damping central shaft 44, and the left limiting step 52 is coplanar with the left end surface of the damping spring flange seat 49; the damping central shaft 44 is sleeved with a left gasket 53 which is jointed with the left limiting step 52 and the left end surface of the damping spring flange seat 49; the left end of the damping central shaft 44 is screwed with a limit nut 54 which is attached to the left side wall of the left gasket 53; the outer diameter of the limit nut 54 and the outer diameter of the left gasket 53 are both smaller than the inner diameter of the fine-tuning fixing sleeve 48.

An external link component 59 is arranged outside the side spray arm 6; a fixing arm 60 is arranged at the upper side of the inner end of the external linking part 59; a rotating shaft 61 is arranged on the fixing arm 60; the upper side of the outer end of the side spray arm 6 is provided with a limit arm 62 positioned below the fixing arm 60; the limiting arm 62 is provided with a rotating hole 63 coaxial with the rotating shaft 61; the rotating shaft 61 passes through the rotating hole 63 and is positioned between the side spray arm 6 and the external link member 59; a lower half block 64 is arranged at the lower end of the rotating shaft 61; the center of the lower half block 64 is provided with a lower through hole 65 which axially penetrates through the lower half block, and the rotating shaft 61 penetrates through the lower through hole 65; the lower surface of the lower half block 64 is provided with a limiting structure; an upper half block 66 coaxial with the lower half block 64 is arranged above the lower half block; an upper through hole 67 axially penetrating through the upper half block 66 is formed in the center of the upper half block, and the rotating shaft 61 penetrates through the upper through hole 67; a buffer spring support 68 positioned above the upper half block 66 is arranged on the rotating shaft 61; a driving structure is arranged on the upper surface of the upper half block 66; the buffer spring support 68 is connected with the driving structure through a buffer spring 69 sleeved outside the rotating shaft 61; the middle part of the lower surface of the upper half block 66 is provided with a groove 70; the middle part of the upper surface of the lower half block 64 is provided with a boss 71 matched with the groove 70; the lower surface of the upper half block 66 is provided with a spiral rotating structure matched with the boss 71.

The spiral rotating structure comprises a left spiral curved surface 72 which is arranged at the right front part and the left rear part of the lower surface of the upper half block 66; the right rear part and the left front part of the lower surface of the upper half block 66 are both provided with a right spiral curved surface 73; the right spiral curved surface 73 is in transition connection with the adjacent left spiral curved surface 72 through an upper sharp-angled contour 74; outer inclined planes 75 are arranged on the left side wall surface and the right side wall surface of the boss 71; a lower sharp-corner contour 76 is arranged at the center of the upper surface of the boss 71; the lower sharp-corner contour 76 is in transitional connection with the outer inclined surface 75 through a sliding arc surface 77; the inner walls of the left side and the right side of the groove 70 are provided with inner inclined planes 78 which are attached to the outer inclined planes 75; the inner inclined surface 78 is in transition connection with the lower surface of the upper half block 66 through a sliding-out cambered surface 79; the middle of the sliding-out cambered surface 79 is provided with a guide surface 80, and the guide surface 80 enables the middle of the sliding-out cambered surface 79 to be gradually bent towards the lower sharp-angled contour 76 and connected with the lower sharp-angled contour 76.

The limiting structure comprises a limiting groove 81 arranged on the lower side of the outer end of the side spray arm 6; a lower clamping groove 82 is formed in the middle of the lower surface of the lower half block 64; a limiting plate 83 sleeved outside the rotating shaft 61 is arranged below the lower half block 64, and the inner end of the limiting plate 83 extends into the limiting groove 81; the upper surface of the limit plate 83 is provided with a lower clamping block 84 matched with the lower clamping groove 82; the lower end of the rotating shaft 61 is screwed with an adjusting nut 85 which is attached to the lower surface of the limiting plate 83.

The driving structure comprises an upper clamping groove 86 arranged in the middle of the upper surface of the upper half block 66; a driving plate 87 sleeved outside the rotating shaft 61 is arranged above the upper half block 66, and the driving plate 87 is connected with a buffer spring support 68 through a buffer spring 69; the lower surface of the driving plate 87 is provided with an upper clamping block 88 matched with the upper clamping groove 86.

The using method of the utility model is as follows:

the water supply assembly 12 can be used for connecting an external water source, when the diaphragm pump 11 is started, the external water source can enter a pipeline system of the boom sprayer through the water supply assembly 12, the pipeline system is an integration of pipelines for connecting various parts of the sprayer, the diaphragm pump 11 and the five-way distribution valve 13 are connected by the pipeline, when water flow is conveyed to the position of the five-way distribution valve 13 under the action of the diaphragm pump 11, the five-way distribution valve 13 is opened along with the water flow, the water flow is conveyed to the main medicine box 2 and the cleaning box 5 respectively, the main medicine box 2 and the cleaning box 5 exist independently, therefore, when cleaning work is required, the source of water suction by the membrane pump 11 can be switched to clean water in the wash tank 5 by means of a five-way distribution valve 13, meanwhile, the hand washing box 4 also exists independently, and when hand washing is needed, the sealing cover 56 can be turned off, and clean water in the hand washing box 4 can be used through the sealing opening 55.

Before adding liquid medicine by using the medicine mixing box 14, the diaphragm pump 11 is connected with the water inlet connector 23 through a pipeline, the end part of the venturi water absorber 25 is connected with the main medicine box, when the diaphragm pump 11 is opened, water flow enters the water outlet valve group 22 from the water inlet connector 23 and then enters the main medicine box 2 through the water pipe 24 and the venturi water absorber 25 in sequence, and at the moment, the liquid medicine flushing nozzle control valve 35, the cleaning nozzle control valve 34 and the powder flushing nozzle control valve 33 are all in a closed state.

If liquid medicine is used, the box cover 20 is opened firstly, then the medicine bottle 57 filled with the liquid medicine is placed into the box body 19 through the opening 1901 at the upper end of the box body 19, and in the placing process, the medicine bottle is inverted, the bottle opening 5701 of the medicine bottle 57 faces downwards, then the medicine liquid flushing nozzle 31 enters the medicine bottle 57 through the bottle opening 5701 of the medicine bottle 57, at the moment, the medicine liquid flushing nozzle 31 can be opened through the handle on the medicine liquid flushing nozzle control valve 35, when the medicine liquid flushing nozzle control valve 35 is opened, water flowing through the water outlet valve group 22 is divided into a part to enter the third flexible pipe 38, then the part is sprayed out from a plurality of mouths of the medicine liquid flushing nozzle 31, the medicine bottle is sleeved outside the medicine liquid flushing nozzle 31, water flow can impact on the inner wall of the medicine bottle 57 along with the water spraying nozzle 31, and the impact mode not only can completely flush the medicine liquid on the inner wall of the medicine bottle 57, and the liquid medicine in the medicine bottle 57 can be rapidly flushed out of the medicine bottle 57 by utilizing the recoil force, enters the box body 1, then enters a space formed by the partition plate 26 and the inner wall of the lower end of the box body 19 in a surrounding manner through the filter screen 28, and then the water outlet valve can be opened at the correct time according to the amount of the liquid medicine, so that the liquid medicine can be fully mixed with the water sprayed by the liquid medicine flushing nozzle 31.

When the outlet valve 29 needs to be opened, the outlet valve 29 can be opened through a handle on the outlet valve 29, liquid medicine in a space formed by enclosing the partition plate 26 and the inner wall of the lower end of the box body 19 can enter the venturi water absorber 25 through the outlet valve 29, and can be rapidly absorbed into the main medicine box under the action of the venturi water absorber 25, so that the liquid filling work of the liquid medicine is completed, in order to improve the dilution and stirring effects, the powder flushing nozzle 32 can be opened, the water content can be effectively improved through the water flow sprayed by the powder flushing nozzle 32, the dilution effect is realized, the impact force of the water flow sprayed by the powder flushing nozzle 32 can automatically complete the stirring between water and the liquid medicine, and the uniformity of the liquid medicine is ensured.

If powder medicine is used, the powder medicine can be directly poured into the box body 19 after the box cover 20 is opened, then the powder flushing nozzle control valve 33 is opened through the handle on the powder flushing nozzle control valve 33, at the moment, water flows to the powder flushing nozzle 32 through the first hose 36, is finally sprayed out of the powder flushing nozzle 32 and is mixed with the powder medicine in the box body 19, the water flow sprayed out of the powder flushing nozzle 32 can be uniformly mixed with the powder medicine into liquid medicine by utilizing the self impact force, then, the opening time of the water outlet valve 29 can be determined according to the quantity of the powder medicine, when the opening time is up, the water outlet valve 29 can be opened, at the moment, the liquid medicine can enter the Venturi water absorber 25 and is quickly sucked into the main medicine box, meanwhile, the powder flushing nozzle 32 can be kept in an open state all the time, the water flow is continuously sprayed out, the dilution effect can be effectively improved, and can improve the stirring effect to the powder medicine, homogeneity when guaranteeing the powder medicine to the at utmost mixes, and stirring shower nozzle 18 can be under the pressure transport of diaphragm pump 11, can effectively spout high-pressure rivers to the impact force through high-pressure rivers further stirs the liquid medicine that enters into to main medicine case 2, further guarantees the homogeneity of medicament.

When the liquid medicine in the box body 19 is completely sucked into the main medicine box, the cleaning spray head 21 can be used for cleaning the inner space of the box body 19 to avoid the liquid medicine residue, before cleaning the box body 1, the box cover 20 is covered outside the opening 1901 at the upper end of the box body 19, then the cleaning nozzle control valve 34 can be opened by the handle on the cleaning nozzle control valve 34, at this time, the water flow enters into the cleaning nozzle 21 through the second hose 37, at this time, the cleaning nozzle 21 can spray umbrella-shaped water flow, the inner wall of the box body 19 is effectively washed to effectively remove the residual liquid medicine on the inner wall of the box body 19, after the cleaning is finished, the water outlet valve 29 can be opened, then, the venturi water absorber 25 is used to suck the cleaning liquid medicine in the box body 19 into the main medicine box, in order to ensure the cleaning effect, the cleaning operation can be repeated for several times, and the liquid medicine can not be remained in the box body 19 to the maximum extent.

After the liquid medicine in the main medicine box 2 is added, the liquid medicine in the main medicine box 2 is conveyed to the accurate pressure-stabilizing distribution valve 10 through a pipeline under the pressure action of the diaphragm pump 11, signals are synchronously transmitted to the microcomputer controller 15 by the flow meter, the pressure sensor and the speed sensor in the wheel in the accurate pressure-stabilizing distribution valve 10, the microcomputer controller 15 automatically adjusts the pressure and flow matching parameters of spraying according to the driving speed of the wheel, so that the aim of accurately spraying the liquid medicine in unit area is fulfilled, as a plurality of water outlets 1001 on the accurate pressure-stabilizing distribution valve 10 are respectively connected with the corresponding spray rods 8, each water outlet 1001 is provided with an independent valve for opening and closing and controlling, different spray rods 8 can be selected to be opened according to actual needs, different spraying areas are completed, and under the condition that other water outlets 1001 are closed, pressure keeps unchangeable, consequently can effectively guarantee accurate spraying, when water connectors 1001 all opened, the liquid medicine in the main medicine case 2 evenly flows into to each spray lance 8 in through accurate steady voltage distribution valve 10, then sprays the crop through the nozzle of preventing drip valve 9 on, the completion sprays the operation.

After the spraying operation is completed, when each pipeline of the boom sprayer and the main medicine box 2 need to be cleaned, the water absorption source of the diaphragm pump 11 can be switched to the cleaning box through the five-way distribution valve 13, the cleaning box is washed by clean water in the cleaning box 5, the originally conveyed liquid medicine is converted into clean water, the effect of cleaning each pipeline and the main medicine box 2 is achieved, the cleaning spray head 17 can spray umbrella-shaped water flow, and the cleaning work of the inner wall of the main medicine box 2 can be effectively completed.

When the boom sprayer jounces in the process of operation to cause the side spray arm 6 to vibrate, the side spray arm 6 swings back and forth, the oil cylinder 45 swings back and forth, at the same time, the oil cylinder 45 pulls the damping center shaft 44 towards the direction far away from the vehicle frame 1 or pushes the damping center shaft towards the direction of the middle spray arm 58, when the damping center shaft 44 is pulled towards the direction far away from the middle spray arm 581, the left gasket 53 approaches the right gasket 47 along with the damping center shaft 44, the left gasket 53 is attached to the left end surface of the damping spring flange seat 49, when the left gasket 53 moves, the left gasket 53 pushes the damping spring flange seat 49 to approach the right gasket 47, and under the condition that the right gasket 47 is limited by the left end surface of the right guide sleeve 43, the distance between the damping spring flange seat 49 and the right gasket 47 becomes smaller as the damping spring flange seat 49 approaches the right gasket 47, the damping spring 51 between the two is compressed and generates elasticity, this elasticity then can be confronted with the pulling force of hydro-cylinder 45, plays the absorbing effect of buffering to the shaking force on the lateral spray arm 6 effectively cushions the shock attenuation, avoids the shaking force too big to lead to the lateral spray arm 6 can't bear and causes the condition that damages or fracture appear, effectively improves the intensity of lateral spray arm 6.

When the shock absorption center shaft 44 is jacked towards the direction of the middle spray arm 58, under the pushing of the right limiting step 46, the right gasket 47 moves along with the shock absorption center shaft 44 and gradually approaches to the shock absorption spring flange seat 49, under the condition that the pressing plate at the right end of the shock absorption spring flange seat 49 is limited by the fine adjustment fixing sleeve 48, the right gasket 47 continuously moves, the distance between the right gasket 47 and the shock absorption spring flange seat 49 continuously decreases, the shock absorption spring 51 positioned between the right gasket and the shock absorption spring flange seat 49 is compressed and generates elasticity, the elasticity can resist against the jacking force of the oil cylinder 45, the effect of buffering and shock absorption is achieved, the shock absorption is effectively performed on the shock force on the side spray arm 6, the situation that the side spray arm 6 cannot bear the shock or the breakage caused by the overlarge shock force is avoided, and the strength of the side spray arm 6 is effectively improved.

When the initial elasticity of the damping spring 51 needs to be adjusted, the initial elasticity can be adjusted by rotating the fine adjustment fixing sleeve 48, when the fine adjustment fixing sleeve 48 moves rightwards along the thread track of the inner wall of the left guide sleeve 42, the fine adjustment fixing sleeve 48 can push the damping spring flange seat 49 to move rightwards through the pressing plate 50, the distance between the damping spring flange seat 49 and the right gasket 47 is reduced, the elasticity of the damping spring 51 is increased, the initial elasticity of the damping spring 51 also determines the damping buffer force of the bidirectional damping spring 51, and therefore the requirements of different spraying operation environments are met.

Liquid medicine washing terminals 31 lower part outer wall is equipped with layer board 39, and the existence of layer board 39 can hold up the medicine bottle 57 of inversion, can play spacing effect simultaneously, avoids medicine bottle 57 to push down excessively to cause the condition of damage to liquid medicine washing terminals 31.

In order to reduce the actual occupied space of the boom sprayer, the side spray arms 6 and the frame 1 are hinged, and the side spray arms 6 can be folded, so that the side spray arms 6 are close to the side walls of the left side and the right side of the main pesticide box 2, and the boom sprayer is convenient to move and transport.

When the boom sprayer runs and encounters an obstacle once, the external link member 59 positioned at the outer side of the side spray arm 1 collides with the obstacle, at the moment, the external link member 59 rotates around the rotating shaft 61, when the external link member 59 rotates, the external link member 59 drives the rotating shaft 61 to rotate through the fixing arm 60, as the buffer spring holder 68 is arranged on the rotating shaft 61, the buffer spring holder 68 is connected with the driving plate 87 through the buffer spring 69, and the driving plate 87 is fixed with the upper huff block 66 through the clamping between the upper clamping block 88 and the upper clamping groove 86, when the rotating shaft 61 rotates along the track of the inner wall of the rotating hole 63, the rotating shaft 61 drives the upper huff block 66 to rotate, the inner end of the limiting plate 83 is clamped in the limiting groove 81 of the fixed side spray arm 6, and the limiting plate 83 is fixed through the clamping between the lower clamping block 84 and the lower clamping groove 82 and the lower huff block 64, the lower half block 64 is in a stationary state when the upper half block 66 is rotated.

According to the different collision directions, the front and back swing directions of the external link component 59 are different, so that the upper half block 66 not only rotates clockwise towards the left direction, but also rotates counterclockwise towards the right direction, when the upper half block 66 rotates towards the left side, the inner inclined surface 78 slides upwards along the outer inclined surface 75, when the inner inclined surface 78 leaves the outer inclined surface 75, the sliding-out arc surface 79 contacts with the sliding arc surface 77 and moves upwards along the track of the sliding arc surface 77, the height of the upper half block 66 continuously rises, the distance between the upper half block 66 and the buffer spring support 68 is reduced, the buffer spring 69 is compressed and generates elasticity, when the sliding-out arc surface 79 is separated from the sliding arc surface 77, the upper half block 66 directly climbs towards the direction of the upper sharp-corner profile 74, and under the action of the guide surface 80, the upper half block 66 rotates along the track of the sliding-out arc surface 79, the locking force between the upper half block 66 and the lower half block 64 is instantaneously reduced, and the locking force becomes smaller and smaller as the rotation angle becomes larger, so that the function of protecting the external link member 59 is achieved, and finally the upper sharp corner profile 74 and the lower sharp corner profile 76 are parallel and relatively attached to each other, and the upper sharp corner profile 74 and the lower sharp corner profile 76 are both in the shape of a sharp corner, so that the situation of mutual limitation cannot occur, and even if there is no inertial external force, the upper sharp corner profile 74 and the lower sharp corner profile 76 are rapidly staggered under the elastic action of the buffer spring 12.

When the upper sharp corner contour 74 is staggered from the lower sharp corner contour 76, the right spiral curved surface 73 contacts with the lower sharp corner contour 76, at this time, the upper half block 66 spirally rotates and returns to the right along the track of the right spiral curved surface 73 under the elastic action of the buffer spring 69, finally, under the guidance of the right spiral curved surface 73, the sliding arc surface 79 moves downwards along the track of the lower sharp corner contour 76 to contact with the sliding arc surface 77, the returning speed is faster and faster along with the decreasing returning angle, finally, the inner inclined surface 78 contacts with the outer inclined surface 75 again, the boss 71 is clamped into the groove 70 again, when the upper half block 66 rotates towards the right side, the direction is only selected to be different, the rotating action is the same as the above steps, only the curved surface contacting with the lower sharp corner contour 76 is changed from the right spiral curved surface 73 to the left spiral curved surface 72, finally, the left spiral curved surface rotates and returns to the left along with the left spiral curved surface 72 or the right spiral curved surface 73, meanwhile, after the inertial resistance generated by collision with the obstacle is lost, the upper half block 66 drives the rotating shaft 61 to return, so that the external link member 59 is driven to return, and the external link member 59 keeps a straight state with the side spray arm 6 again.

The overlapping degree of the inner inclined surface 78 and the outer inclined surface 75 can control the locking force between the upper half block 66 and the lower half block 64, the larger the overlapping degree of the inner inclined surface 78 and the outer inclined surface 75 is, the larger the locking force is, the original elasticity of the buffer spring 69 can also determine the locking force between the upper half block 66 and the lower half block 64, the elasticity of the buffer spring 69 can be adjusted through the adjusting nut 85, when the adjusting nut 85 moves upwards along the thread track at the lower end of the rotating shaft 61, the lower half block 64 pushes the upper half block to move upwards, at this time, the distance between the upper half block 66 and the buffer spring support 68 is reduced, the buffer spring 69 is compressed, the elasticity of the buffer spring 69 is increased, the initial locking force is increased accordingly, the larger the initial locking force is, the larger the inertial external connecting component 59 can be knocked open by the larger external connecting component 59, therefore, the initial locking force can be set according to actual needs, and the flexible effect of the external connecting component 59 is ensured, this has the effect of protecting the external link member 59.

Claims (10)

1. The utility model provides a towed boom sprayer, includes the frame, locates main medical kit and a plurality of evenly distributed in the wheel of frame below on the frame, its characterized in that: a hand washing box and a cleaning box positioned on the front side of the hand washing box are arranged on the front side of the main medicine box; the upper surface of the hand washing box is provided with a sealing opening which is screwed with a sealing cover; the rear end of the frame is provided with a middle spray arm, and the left side and the right side of the middle spray arm are respectively hinged with a side spray arm; a bidirectional damping mechanism is arranged between the frame and the side spray arm; the side spray arm is provided with a plurality of spray rods which are uniformly distributed, and the spray rods are provided with a plurality of anti-drip valves which are uniformly distributed; the frame is provided with an accurate pressure-stabilizing distribution valve; a plurality of water outlet connectors on the precise pressure-stabilizing distribution valve are respectively connected with the corresponding spray rods; a diaphragm pump is arranged on the frame; the diaphragm pump is connected with an external water adding component; a five-way distribution valve connected with the diaphragm pump is arranged on the frame and is simultaneously connected with the main medicine box and the cleaning box; a medicine mixing box matched with the main medicine box is arranged on the right side of the frame; and the frame is provided with a microcomputer controller matched with the accurate pressure-stabilizing distribution valve.

2. The towed boom sprayer of claim 1, wherein: the diaphragm pump is connected with a manual three-way pressure regulating valve matched with the diaphragm pump; a cleaning spray head is arranged on the inner wall of the upper side of the main medicine box; the cleaning spray head is connected with a manual three-way pressure regulating valve through a pipeline; and a stirring spray head connected with a manual three-way pressure regulating valve is arranged below the inner wall of the rear side of the main medicine box.

3. The towed boom sprayer of claim 1, wherein: the medicine mixing box comprises a box body arranged on the right side of the main medicine box, and an opening cover at the upper end of the box body is covered with a box cover; a cleaning spray head is arranged at the center of the lower surface of the box cover; a water outlet valve group is arranged on the outer wall of the rear side of the box body; the left end of the water outlet valve group is provided with a water inlet joint, and the right end of the water outlet valve group is connected with the Venturi water absorber through a water pipe; a partition plate is arranged in the lower part of the box body; a water through hole is formed in the center of the partition plate; a filter screen matched with the limber hole is arranged in the limber hole; the outer wall of the right side of the lower end of the box body is provided with a water outlet valve communicated with the Venturi water absorber, and a space formed by enclosing the partition board and the inner wall of the lower end of the box body is communicated with the water outlet valve; the inner wall of the right side of the box body is provided with a mounting seat; the mounting seat is provided with a liquid medicine washing nozzle matched with the mounting seat; the inner wall of the left side of the box body is provided with a powder washing nozzle, and the powder washing nozzle and the liquid medicine washing nozzle are both positioned above the partition plate.

4. The towed boom sprayer of claim 3, wherein: the water outlet valve group comprises a powder flushing nozzle control valve, a cleaning nozzle control valve and a liquid medicine flushing nozzle control valve; the powder washing nozzle control valve is connected with the powder washing nozzle through a first hose; the cleaning spray head control valve is connected with the cleaning spray head through a second hose; the control valve of the liquid medicine washing nozzle is connected with the liquid medicine washing nozzle through a third hose; the outer wall of the lower part of the liquid medicine washing nozzle is provided with a supporting plate.

5. The towed boom sprayer of claim 1, wherein: the bidirectional damping mechanism comprises a damping frame arranged on the middle spray arm; the left side and the right side of the shock absorption frame are both provided with a shock absorption welding seat, the middle part of the shock absorption welding seat on the left side is provided with a left guide sleeve, and the middle part of the shock absorption welding seat on the right side is provided with a right guide sleeve coaxial with the left guide sleeve; a damping central shaft passes through the left guide sleeve and the right guide sleeve; an oil cylinder is arranged at one end of the side spray arm, which is close to the middle spray arm; the end part of one end of the oil cylinder, which is adjacent to the middle spray arm, is hinged with the damping central shaft; the outer wall of the right part of the damping central shaft is provided with an annular right limiting step, and the right limiting step is coplanar with the left end face of the right guide sleeve; a right gasket which is attached to the left end face of the right limiting step and the left end face of the right guide sleeve is sleeved outside the damping central shaft; a fine adjustment fixing sleeve is screwed in the left guide sleeve, and the length of the fine adjustment fixing sleeve is greater than that of the left guide sleeve; a damping spring flange seat sleeved outside the damping central shaft is arranged between the fine-tuning fixing sleeve and the left part of the damping central shaft; a pressing plate attached to the right end face of the fine adjustment fixing sleeve extends outwards from the right end of the damping spring flange seat; a damping spring sleeved outside the damping central shaft is arranged between the pressure plate and the right gasket; and the left end of the damping central shaft is provided with a reverse pushing device matched with the damping spring flange seat.

6. The towed boom sprayer of claim 5, wherein: the reverse pushing device comprises a left limiting step arranged at the left end of the damping central shaft, and the left limiting step is coplanar with the left end surface of the damping spring flange seat; the damping central shaft is externally sleeved with a left gasket which is attached to the left limiting step and the left end face of the damping spring flange seat; the left end of the damping central shaft is in threaded connection with a limit nut which is attached to the left side wall of the left gasket; the outer diameter of the limiting nut and the outer diameter of the left gasket are both smaller than the inner diameter of the fine-tuning fixing sleeve.

7. The towed boom sprayer of claim 1, wherein: an external link component is arranged outside the side spray arm; a fixed arm is arranged on the upper side of the inner end of the external link part; the fixed arm is provided with a rotating shaft; a limiting arm positioned below the fixed arm is arranged on the upper side of the outer end of the side spraying arm; the limiting arm is provided with a rotating hole coaxial with the rotating shaft; the rotating shaft penetrates through the rotating hole and is positioned between the side spray arm and the external link component; a lower half block is arranged at the lower end of the rotating shaft; the center of the lower half block is provided with a lower through hole which axially penetrates through the lower half block, and the rotating shaft penetrates through the lower through hole; the lower surface of the lower half block is provided with a limiting structure; an upper half block coaxial with the lower half block is arranged above the lower half block; an upper through hole which axially penetrates through the upper half block is formed in the center of the upper half block, and the rotating shaft penetrates through the upper through hole; a buffer spring support positioned above the upper half block is arranged on the rotating shaft; a driving structure is arranged on the upper surface of the upper half block; the buffer spring support is connected with the driving structure through a buffer spring sleeved outside the rotating shaft; a groove is formed in the middle of the lower surface of the upper half block; a boss matched with the groove is arranged in the middle of the upper surface of the lower half block; and the lower surface of the upper half block is provided with a spiral rotating structure matched with the boss.

8. The towed boom sprayer of claim 7 wherein: the spiral rotating structure comprises a left spiral curved surface arranged at the right front part and the left rear part of the lower surface of the upper half block; the right rear part and the left front part of the lower surface of the upper half block are provided with a right spiral curved surface; the right spiral curved surface is in transition connection with the adjacent left spiral curved surface through an upper sharp corner profile; outer inclined planes are arranged on the left side wall surface and the right side wall surface of the boss; a lower sharp corner profile is arranged at the center of the upper surface of the boss; the lower sharp corner profile is in transitional connection with the outer inclined surface through a sliding arc surface; inner inclined planes attached to the outer inclined planes are arranged on the inner walls of the left side and the right side of the groove; the inner inclined surface is in transition connection with the lower surface of the upper half block through a sliding-out cambered surface; and a guide surface is arranged in the middle of the sliding-out cambered surface, and the middle of the sliding-out cambered surface is gradually bent towards the contour of the lower sharp corner by the guide surface and is connected with the contour of the lower sharp corner.

9. The towed boom sprayer of claim 7, wherein: the limiting structure comprises a limiting groove arranged on the lower side of the outer end of the side spray arm; a lower clamping groove is formed in the middle of the lower surface of the lower half block; a limiting plate sleeved outside the rotating shaft is arranged below the lower half block, and the inner end of the limiting plate extends into the limiting groove; the upper surface of the limiting plate is provided with a lower clamping block matched with the lower clamping groove; the lower end of the rotating shaft is in threaded connection with an adjusting nut which is attached to the lower surface of the limiting plate.

10. The towed boom sprayer of claim 7, wherein: the driving structure comprises an upper clamping groove arranged in the middle of the upper surface of the upper half block; a driving plate sleeved outside the rotating shaft is arranged above the upper half block and is connected with the buffer spring support through a buffer spring; the lower surface of the driving plate is provided with an upper clamping block matched with the upper clamping groove.

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