CN202714115U - Traction type boom sprayer - Google Patents

Traction type boom sprayer Download PDF

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Publication number
CN202714115U
CN202714115U CN 201220383083 CN201220383083U CN202714115U CN 202714115 U CN202714115 U CN 202714115U CN 201220383083 CN201220383083 CN 201220383083 CN 201220383083 U CN201220383083 U CN 201220383083U CN 202714115 U CN202714115 U CN 202714115U
Authority
CN
China
Prior art keywords
spray
arm
traction
spray arm
arms
Prior art date
Application number
CN 201220383083
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Chinese (zh)
Inventor
窦有良
Original Assignee
邯郸市升华机械制造有限公司
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Publication date
Application filed by 邯郸市升华机械制造有限公司 filed Critical 邯郸市升华机械制造有限公司
Priority to CN 201220383083 priority Critical patent/CN202714115U/en
Application granted granted Critical
Publication of CN202714115U publication Critical patent/CN202714115U/en

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Abstract

A traction type boom sprayer comprises a traction machine frame, a spray tank and a spray arm system located on the back portion of the traction machine frame, wherein the spray tank is placed on the traction machine frame. The traction type boom sprayer is characterized in that the sprayer further comprises a filter, a membrane pump and a pressure regulating valve; the spray arm system is formed by a lifting frame, a middle spray arm, a balance mechanism, two driving arms, two general arms, two tail spray arms, a plurality of spray booms, a plurality of spray nozzles, a lifting oil cylinder and two spreading arm oil cylinders; and the filter is installed on the front portion of the traction machine frame, the membrane pump is movably fixed on a traction mechanism located on the lower portion of the front side of the traction machine frame, a front end support of the traction mechanism is connected with a suspension arm on the back portion of an external tractor, a transmission shaft of the membrane pump is connected with a power output shaft of the external tractor through an external output shaft, and the pressure regulating valve is installed on the upper portion of the front portion of the traction machine frame. The traction type boom sprayer has the advantages of being large in volume of the spray tank, long in spray width, simple, convenient and quick to operate, high in working efficiency, freely retractable in the spray arm system, and good in balance.

Description

Trailer boom sprayer
Technical field
The utility model relates to a kind of sprayer, and a kind of trailer boom sprayer particularly is applicable to spray liquids such as land for growing field crops crops such as corn, wheat, soybean.
Background technology
At present, domestic and international existing trailer boom sprayer spray tank less (capacity is generally below 2000L), spraying swath shorter (general≤21 meters) is not suitable for land for growing field crops crops large tracts of land spray liquid; If spraying swath is lengthened, just need to increase the length of spray boom, himself is just heavier and spray boom is longer, so that the folding and unfolding difficulty of spray arm is larger, and the balance of sprayer spray arm system arranged on left and right sides spray arm also guarantees bad.More than be the deficiencies in the prior art.
The utility model content
The purpose of this utility model is: overcome the deficiencies in the prior art, design the trailer boom sprayer that a kind of spray tank capacity is large, spraying swath is long, this sprayer is simple, convenient fast, operating efficiency is high, and the spray arm system acts freely, balance is good, is fit to land for growing field crops crops large tracts of land spray liquid very much.
The purpose of this utility model can realize by following technical proposals:
This trailer boom sprayer, comprise the traction frame, spray tank and the spray arm system that is positioned at traction frame rear portion, spray tank is placed on the traction frame, it is characterized in that: this sprayer also comprises filter, membrane pump and pressure regulator valve, described spray arm system is by crane, middle spray arm, balanced controls, two actuating arms, two general arms, two tail spray arms, some spray booms, some shower nozzles, hoist cylinder and two exhibition arm oil cylinders form, crane is fixed in the hanger bracket fluctuating orbit at traction frame rear portion, middle spray arm is connected on the crane by bearing pin and connecting plate I, balanced controls are installed between the middle fixed mount and crane of middle spray arm, two actuating arms all pass through respectively bearing pin, connecting plate II and upper tie-bar are connected to the left side of middle spray arm, right both sides, two general arms all pass through respectively bearing pin, connecting plate II and hinge plate I are connected on two actuating arms, be connected time tie-bar by bearing pin between hinge plate I and the middle spray arm, two tail spray arms all pass through respectively bearing pin, hinge plate II is connected on two general arms, hinge plate I and hinge plate II all are connected to respectively the two ends of connecting rod by bearing pin and pull bar, the middle part of connecting rod is fixed on the general arm by bearing pin, the actuating arm of middle spray arm and middle spray arm both sides, the bottom of general arm and tail spray arm all is fixed with spray boom, some shower nozzles are installed on these spray booms, anti-dripping valve and screen pack are housed in the drain pipe of each shower nozzle, connect and compose 4 sections jet pipes with high-pressure hose between these spray booms, wherein, the spray boom of the actuating arm bottom in spray arm system left side is the 1st section jet pipe, it is the 2nd section jet pipe with tail spray arm bottom after connecting with high-pressure hose that the general arm in spray arm system left side is connected spray boom, it is the 3rd section jet pipe with spray arm system right side after connecting with high-pressure hose that the middle spray arm of spray arm system is connected the spray boom of actuating arm bottom, it is the 4th section jet pipe with tail spray arm bottom after connecting with high-pressure hose that the general arm on spray arm system right side is connected spray boom, hoist cylinder is installed in the gin pole of the hanger bracket that draws the frame rear portion, the axis of the piston and the crane of hoist cylinder are hinged, cylinder barrel end axle and each actuating arm of each exhibition arm oil cylinder are hinged, the axis of the piston of each exhibition arm oil cylinder and every group of hinge plate I are hinged, filter is installed in the forward position on the traction frame, membrane pump is movably fixed on the haulage gear that is positioned at traction frame front lower position, the front-end bracket of haulage gear is connected with the suspension arm at external tractor rear portion, the power transmission shaft of membrane pump is connected with the power take-off of external tractor by external output shaft, and pressure regulator valve is installed in the front upper position of traction frame;
Its pipeline annexation is: the liquid outlet of spray tank is connected with the import of filter by high-pressure hose, the outlet of filter connects the inlet of membrane pump by high-pressure hose, the liquid outlet of membrane pump connects the inlet of pressure regulator valve by high-pressure hose, the liquid return hole of membrane pump is connected to time liquid stirring port of spray tank by high-pressure hose, the overfall of pressure regulator valve is connected to the overfall of spray tank by high-pressure hose, the inlet of 4 sections jet pipes that 4 liquid outlets of pressure regulator valve consist of by high-pressure hose and some spray booms respectively is connected.
Balanced controls described in the utility model are made of two springs, four latch brackets, two rhizoid thick sticks, two opening nuts, two plain washers and four plain nuts, one end of two springs all is fitted on the middle fixed mount of middle spray arm by a latch bracket, the other end of two springs is connected with the end of two opening nuts with two rhizoid thick sticks by two latch brackets respectively, the other end of two rhizoid thick sticks is installed in respectively the both sides of crane, and each is fixed by a plain washer and two plain nuts.
Haulage gear of the present utility model is by towing bracket, split pin, hexagon slotted nut, plain cushion, axis of traction, traction casing, connecting axle, steady pin and pump fixed head consist of, towing bracket is by adapter sleeve and the split pin at its rear portion, hexagon slotted nut is connected with the front end of axis of traction with plain cushion, the anterior link of towing bracket is connected with the suspension arm at external tractor rear portion, be provided with traction casing at axis of traction, the bottom of connecting axle is loaded in the traction casing, and fixed by steady pin, the pump fixed head is fixed on the upper end of connecting axle, it can rotate together with connecting axle, and membrane pump is fixed on the pump fixed head.
The spray tank capacity of this sprayer of the utility model is 3000L; The spraying swath of this sprayer is 30 meters.
The utility model advantage is: 1) the spray tank capacity is large, has reached the standard of 3000L liquid capacity; 2) spraying swath is long, has reached 30 meters spraying swaths; 3) this sprayer is simple to operate, and driver one people can carry out mechanical, electrical, liquid integrated substantial length of operation to sprayer, and convenient and swift, operating efficiency is high, and spray liquid atomizes, antidrip reliable, pressure stability; 4) owing to adopting bearing pin, connecting plate, tie-bar, hinge plate and the pull bar mode of being connected to connect between middle spray arm, actuating arm, general arm and the tail spray arm of this sprayer spray arm system, and be provided with balanced controls in the spray arm system, therefore this sprayer is in the situation that the spray arm lengthening, can guarantee that still the spray arm system acts freely, balance is good, therefore this sprayer is fit to liquids such as land for growing field crops crops (such as corn, wheat, soybean etc.) large tracts of land sprinkling chemical herbicide, liquid fertilizers very much; 5) this sprayer can also carry out cleaning and sterilizing to farm machinery and animal house etc. with spray gun, is widely used.
Description of drawings
Fig. 1 is backsight structural representation of the present utility model;
Fig. 2 is the right TV structure schematic diagram after Fig. 1 removes spray arm system arranged on left and right sides spray arm;
Fig. 3 is the partial structurtes enlarged diagram of spray arm system left side spray arm;
Fig. 4 is pipeline structure schematic diagram of the present utility model;
Fig. 5 is balanced controls structure for amplifying schematic diagram;
Fig. 6 is that the haulage gear master looks the structure for amplifying schematic diagram;
Fig. 7 is the plan structure schematic diagram of Fig. 6.
Embodiment
Such as Fig. 1---shown in the of 7, this trailer boom sprayer, comprise traction frame 1, spray tank 2 and the spray arm system that is positioned at traction frame 1 rear portion, spray tank 2 is placed on the traction frame 1, it is characterized in that: this sprayer also comprises filter 20, membrane pump 21 and pressure regulator valve 22, described spray arm system is by crane 3, middle spray arm 4, balanced controls 14, two actuating arms 5, two general arms 6, two tail spray arms 7, some spray booms 12, some shower nozzles 13, hoist cylinder 10 and two exhibition arm oil cylinders 11 form, crane 3 is fixed in the hanger bracket fluctuating orbit at traction frame 1 rear portion, middle spray arm 4 is connected on the crane 3 by bearing pin and connecting plate I 32, balanced controls 14 are installed between the middle fixed mount 31 and crane 3 of middle spray arm 4, two actuating arms 5 all pass through respectively bearing pin, connecting plate II 15 and upper tie-bar 9 are connected to the left side of middle spray arm 4, right both sides, two general arms 6 all pass through respectively bearing pin, connecting plate II 15 and hinge plate I 19 are connected on two actuating arms 5, be connected time tie-bar 8 by bearing pin between hinge plate I 19 and the middle spray arm 4, two tail spray arms 7 all pass through respectively bearing pin, hinge plate II 17 is connected on two general arms 6, hinge plate I 19 and hinge plate II 17 all are connected to respectively the two ends of connecting rod 18 by bearing pin and pull bar 16, the middle part of connecting rod 18 is fixed on the general arm 6 by bearing pin, the actuating arm 5 of middle spray arm 4 and middle spray arm 4 both sides, the bottom of general arm 6 and tail spray arm 7 all is fixed with spray boom 12, some shower nozzles 13 are installed on these spray booms 12, anti-dripping valve and screen pack are housed in the drain pipe of each shower nozzle 13, connect and compose 4 sections jet pipes 24 with high-pressure hose between these spray booms 12, wherein, the spray boom 12 of actuating arm 5 bottoms in spray arm system left side is the 1st section jet pipe 24, it is the 2nd section jet pipe 24 with the tail spray arm after connecting that the general arm 6 in spray arm system left side is connected the spray boom 12 usefulness high-pressure hoses of bottom, it is the 3rd section jet pipe 24 with spray arm system right side after connecting that the middle spray arm 4 of spray arm system is connected the spray boom 12 usefulness high-pressure hoses of actuating arm 5 bottoms, it is the 4th section jet pipe 24 with the tail spray arm after connecting that the general arm 6 on spray arm system right side is connected the spray boom 12 usefulness high-pressure hoses of bottom, hoist cylinder 10 is installed in the gin pole of the hanger bracket that draws frame 1 rear portion, the axis of the piston of hoist cylinder 10 and crane 3 are hinged, cylinder barrel end axle and each actuating arm 5 of each exhibition arm oil cylinder 11 are hinged, the axis of the piston of each exhibition arm oil cylinder 11 and every group of hinge plate I 19 are hinged, filter 20 is installed in the forward position on the traction frame 1, membrane pump 21 is movably fixed on the haulage gear 23 that is positioned at traction frame 1 front lower position, the front-end bracket of haulage gear 23 is connected with the suspension arm at external tractor rear portion, the power transmission shaft of membrane pump 21 is connected with the power take-off of external tractor by external output shaft, and pressure regulator valve 22 is installed in the front upper position of traction frame 1;
Its pipeline annexation is: the liquid outlet of spray tank 2 is connected by the import of high-pressure hose with filter 20, the outlet of filter 20 connects the inlet of membrane pump 21 by high-pressure hose, the liquid outlet of membrane pump 21 connects the inlet of pressure regulator valve 22 by high-pressure hose, the liquid return hole of membrane pump 21 is connected to time liquid stirring port of spray tank 2 by high-pressure hose, the overfall of pressure regulator valve 22 is connected to the overfall of spray tank 2 by high-pressure hose, the inlet of 4 sections jet pipes 24 that 4 liquid outlets of pressure regulator valve 22 consist of by high-pressure hose and some spray booms 12 respectively is connected.
Shown in Fig. 1,5, described balanced controls 14 are made of two springs 28, four latch brackets 29, two rhizoid thick sticks 26, two opening nuts 27, two plain washers 30 and four plain nuts 25, one end of two springs 28 all is fitted on the middle fixed mount 31 of middle spray arm 4 by a latch bracket 29, the other end of two springs 28 is connected with the end of two opening nuts 27 with two rhizoid thick sticks 26 by two latch brackets 29 respectively, the other end of two rhizoid thick sticks 26 is installed in respectively the both sides of crane 3, and each is fixing by a plain washer 30 and two plain nuts 25.
Such as Fig. 2,6, shown in 7, haulage gear 23 is by towing bracket 36, split pin 33, hexagon slotted nut 34, plain cushion 35, axis of traction 40, traction casing 39, connecting axle 37, steady pin 38 and pump fixed head 41 consist of, towing bracket 36 is by adapter sleeve and the split pin 33 at its rear portion, hexagon slotted nut 34 is connected with the front end of plain cushion 35 with axis of traction 40, the anterior link 36.1 of towing bracket 36 is connected with the suspension arm at external tractor rear portion, be provided with traction casing 39 at axis of traction 40, the bottom of connecting axle 37 is loaded in the traction casing 39, and fixing by steady pin 38, pump fixed head 41 is fixed on the upper end of connecting axle 37, it can rotate together with connecting axle 37, and membrane pump 21 is fixed on the pump fixed head 41.
Spray tank 2 capacity of this sprayer are 3000L; The spraying swath of this sprayer is 30 meters.
The operation principle of this trailer boom sprayer is: drive the power transmission shaft rotation of membrane pump 21 by the power take-off of external 80 horsepowers of tractors, drive membrane pump 21 work, after the 21 interior pressurizations of the process of the liquid in the spray tank 2 filter 20 suction membrane pumps, liquid is sent into pressure regulator valve 22, after pressure regulator valve 22 is adjusted to needed operating pressure with liquid pressure, liquid is delivered to 4 sections jet pipes 24 that some spray booms 12 consist of, liquid is through anti-dripping valve and screen pack in the some shower nozzles 13 on 4 sections jet pipes 24, by ejection after some shower nozzle 13 atomizings, carry out spraying operation.This sprayer in the spraying operation process, membrane pump 21 can be with the turning of external tractor position of rotation; The lifting of hoist cylinder 10 drives the lifting of crane 3, the lifting of spray arm 4 during the lifting of crane 3 drives, and then drive the lifting of two actuating arms 5, two general arms 6 and two tail spray arms 7, so the lifting of the whole spray arm of the extension and contraction control of hoist cylinder 10 system spray arm; And the flexible folding and unfolding of controlling respectively two general arms 6 and two actuating arms 5 of two exhibition arm oil cylinders 11.

Claims (4)

1. trailer boom sprayer, comprise traction frame (1), spray tank (2) and be positioned at the spray arm system at traction frame (1) rear portion, spray tank (2) is placed on the traction frame (1), it is characterized in that: this sprayer also comprises filter (20), membrane pump (21) and pressure regulator valve (22), described spray arm system is by crane (3), middle spray arm (4), balanced controls (14), two actuating arms (5), two general arms (6), two tail spray arms (7), some spray booms (12), some shower nozzles (13), hoist cylinder (10) and two exhibition arm oil cylinders (11) form, crane (3) is fixed in the hanger bracket fluctuating orbit at traction frame (1) rear portion, middle spray arm (4) is connected on the crane (3) by bearing pin and connecting plate I (32), balanced controls (14) are installed between the middle fixed mount (31) and crane (3) of middle spray arm (4), two actuating arms (5) all pass through respectively bearing pin, connecting plate II (15) and upper tie-bar (9) are connected to the left side of middle spray arm (4), right both sides, two general arms (6) all pass through respectively bearing pin, connecting plate II (15) and hinge plate I (19) are connected on two actuating arms (5), be connected time tie-bar (8) by bearing pin between hinge plate I (19) and the middle spray arm (4), two tail spray arms (7) all pass through respectively bearing pin, hinge plate II (17) is connected on two general arms (6), hinge plate I (19) and hinge plate II (17) all are connected to respectively the two ends of connecting rod (18) by bearing pin and pull bar (16), the middle part of connecting rod (18) is fixed on the general arm (6) by bearing pin, the actuating arm (5) of middle spray arm (4) and middle spray arm (4) both sides, the bottom of general arm (6) and tail spray arm (7) all is fixed with spray boom (12), some shower nozzles (13) are installed on these spray booms (12), in the drain pipe of each shower nozzle (13) anti-dripping valve and screen pack are housed, connect and compose 4 sections jet pipes (24) with high-pressure hose between these spray booms (12), wherein, the spray boom (12) of actuating arm (5) bottom in spray arm system left side is the 1st section jet pipe (24), the general arm (6) in spray arm system left side is connected 7 with the tail spray arm) spray boom (12) of bottom is the 2nd section jet pipe (24) after with the high-pressure hose connection, it is the 3rd section jet pipe (24) with spray arm system right side after connecting with high-pressure hose that the middle spray arm (4) of spray arm system is connected the spray boom (12) of actuating arm (5) bottom, the general arm (6) on spray arm system right side is connected 7 with the tail spray arm) spray boom (12) of bottom is the 4th section jet pipe (24) after connecting with high-pressure hose, hoist cylinder (10) is installed in the gin pole of the hanger bracket that draws frame (1) rear portion, the axis of the piston of hoist cylinder (10) and crane (3) are hinged, cylinder barrel end axle and each actuating arm (5) of each exhibition arm oil cylinder (11) are hinged, the axis of the piston of each exhibition arm oil cylinder (11) and every group of hinge plate I (19) are hinged, filter (20) is installed in the forward position on the traction frame (1), membrane pump (21) is movably fixed on the haulage gear (23) that is positioned at traction frame (1) front lower position, the front-end bracket of haulage gear (23) is connected with the suspension arm at external tractor rear portion, the power transmission shaft of membrane pump (21) is connected with the power take-off of external tractor by external output shaft, and pressure regulator valve (22) is installed in the front upper position of traction frame (1);
Its pipeline annexation is: the liquid outlet of spray tank (2) is connected by the import of high-pressure hose with filter (20), the outlet of filter (20) connects the inlet of membrane pump (21) by high-pressure hose, the liquid outlet of membrane pump (21) connects the inlet of pressure regulator valve (22) by high-pressure hose, the liquid return hole of membrane pump (21) is connected to time liquid stirring port of spray tank (2) by high-pressure hose, the overfall of pressure regulator valve (22) is connected to the overfall of spray tank (2) by high-pressure hose, the inlet of 4 sections jet pipes (24) that 4 liquid outlets of pressure regulator valve (22) consist of by high-pressure hose and some spray booms (12) respectively is connected.
2. trailer boom sprayer according to claim 1, it is characterized in that: described balanced controls (14) are by two springs (28), four latch brackets (29), two rhizoid thick sticks (26), two opening nuts (27), two plain washers (30) and four plain nuts (25) consist of, one end of two springs (28) all is fitted on the middle fixed mount (31) of middle spray arm (4) by a latch bracket (29), the other end of two springs (28) is connected with the end of two opening nuts (27) with two rhizoid thick sticks (26) by two latch brackets (29) respectively, the other end of two rhizoid thick sticks (26) is installed in respectively the both sides of crane (3), and each is fixing by a plain washer (30) and two plain nuts (25).
3. trailer boom sprayer according to claim 1 and 2, it is characterized in that: haulage gear (23) is by towing bracket (36), split pin (33), hexagon slotted nut (34), plain cushion (35), axis of traction (40), traction casing (39), connecting axle (37), steady pin (38) and pump fixed head (41) consist of, towing bracket (36) is by adapter sleeve and the split pin (33) at its rear portion, hexagon slotted nut (34) is connected with the front end of plain cushion (35) with axis of traction (40), the anterior link (36.1) of towing bracket (36) is connected with the suspension arm at external tractor rear portion, be provided with traction casing (39) at axis of traction (40), the bottom of connecting axle (37) is loaded in the traction casing (39), and fixing by steady pin (38), pump fixed head (41) is fixed on the upper end of connecting axle (37), it can rotate by same connecting axle (37) together, and membrane pump (21) is fixed on the pump fixed head (41).
4. trailer boom sprayer according to claim 3, it is characterized in that: the spray tank of this sprayer (2) capacity is 3000L; The spraying swath of this sprayer is 30 meters.
CN 201220383083 2012-08-03 2012-08-03 Traction type boom sprayer CN202714115U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220383083 CN202714115U (en) 2012-08-03 2012-08-03 Traction type boom sprayer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220383083 CN202714115U (en) 2012-08-03 2012-08-03 Traction type boom sprayer

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CN202714115U true CN202714115U (en) 2013-02-06

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Application Number Title Priority Date Filing Date
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103329875A (en) * 2013-06-06 2013-10-02 山东众和建筑机械有限公司 Self-walking plant protection spraying machine
CN103404501A (en) * 2013-07-20 2013-11-27 李海舰 Ultra-wide lance boom type spraying machine
CN103621485A (en) * 2013-10-30 2014-03-12 李海舰 Ultra-wide insecticide sprayer rack
CN104542540A (en) * 2014-04-08 2015-04-29 新疆农垦科学院 Ultra-wide electrostatic spraying machine
CN105123658A (en) * 2015-09-01 2015-12-09 响水县粮油作物栽培技术指导站 Machine integrating pesticide spraying and rice seedling transplanting
CN105638610A (en) * 2014-09-22 2016-06-08 朱大海 Intelligent self-propelled pesticide spraying machine
CN105660578A (en) * 2016-04-11 2016-06-15 富锦市立兴植保机械制造有限公司 Automatic balance vibration reduction liftable spraying frame
RU2645337C1 (en) * 2016-10-31 2018-02-21 Федеральное государственное бюджетное образовательное учреждение высшего образования "Вятская государственная сельскохозяйственная академия" (ФГБОУ ВО Вятская ГСХА) Energy-saving trailer sucker-rod sprayer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103329875A (en) * 2013-06-06 2013-10-02 山东众和建筑机械有限公司 Self-walking plant protection spraying machine
CN103329875B (en) * 2013-06-06 2015-04-22 武德林 Self-walking plant protection spraying machine
CN103404501A (en) * 2013-07-20 2013-11-27 李海舰 Ultra-wide lance boom type spraying machine
CN103621485A (en) * 2013-10-30 2014-03-12 李海舰 Ultra-wide insecticide sprayer rack
CN103621485B (en) * 2013-10-30 2015-04-01 李海舰 Ultra-wide insecticide sprayer rack
CN104542540A (en) * 2014-04-08 2015-04-29 新疆农垦科学院 Ultra-wide electrostatic spraying machine
CN105638610A (en) * 2014-09-22 2016-06-08 朱大海 Intelligent self-propelled pesticide spraying machine
CN105123658A (en) * 2015-09-01 2015-12-09 响水县粮油作物栽培技术指导站 Machine integrating pesticide spraying and rice seedling transplanting
CN105660578A (en) * 2016-04-11 2016-06-15 富锦市立兴植保机械制造有限公司 Automatic balance vibration reduction liftable spraying frame
RU2645337C1 (en) * 2016-10-31 2018-02-21 Федеральное государственное бюджетное образовательное учреждение высшего образования "Вятская государственная сельскохозяйственная академия" (ФГБОУ ВО Вятская ГСХА) Energy-saving trailer sucker-rod sprayer

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Granted publication date: 20130206

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