CN111109226A

CN111109226A - Air curtain device for wide-width plant protection operation

Info

Publication number: CN111109226A
Application number: CN202010004550.6A
Authority: CN
Inventors: 李海龙; 权龙哲; 姜伟; 赵成顺; 韩凯; 熊思齐; 关超
Original assignee: Northeast Agricultural University
Current assignee: Northeast Agricultural University
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-05-08
Anticipated expiration: 2040-01-03
Also published as: CN111109226B

Abstract

The invention relates to the field of agricultural machinery and plant protection operation machinery, and discloses a special air curtain device for a fan-shaped spray head for wide-width plant protection operation, which comprises: the fan, the fan blast pipe, the middle-arranged frame, the air outlet pipe, the middle-arranged air curtain pipe, the right-arranged air curtain pipe, the left-arranged air curtain pipe plug, the right-arranged air curtain pipe plug, the sealing plug strip, the air curtain pipe fixing support, the frame air pipe, the side arm support and the fan-shaped spraying unit assembly. The special air curtain pipe for the fan-shaped spray nozzle is designed by adopting the coanda effect edge airflow acceleration principle, reduces the air quantity in the air curtain operation process, reduces the energy consumption in the pesticide spraying process, has a simple designed air curtain pipe structure, a light air curtain device, a small and exquisite structure, convenience in installation and assembly and a compact structure, reduces the gravity center of operation equipment, has uniform air outlet and strong directivity, greatly reduces the drift of the fan-shaped spray nozzle in the pesticide spraying process, has uniform air outlet and good concentration, and can greatly reduce the drift of fog drops in the operation process.

Description

Air curtain device for wide-width plant protection operation

Technical Field

The invention relates to the field of agricultural machinery, in particular to the field of agricultural plant protection operation machinery, which is suitable for spraying operation of a fan-shaped spray head.

Background

The existing wide-width operation pesticide spraying machine mainly has the following defects:

1. the medicine spraying machine is in the operation process, the drift of the medicine drops in the medicine spraying process of the spray head is caused due to the action of the walking speed and the wind force under the natural environment, the environment is seriously affected, and the problem of the drift of the medicine drops can be solved to a certain extent by the existing air curtain device consisting of the axial flow fan and the air curtain with the air leakage prevention function.

2. The existing air curtain device is complex in structure, the air curtain needs to be replaced by the whole air curtain if a certain part of the air curtain is damaged, the air outlet direction of the traditional air curtain is dispersed, an axial flow fan is needed to generate a large amount of air, the air curtain is maintained to work continuously, and meanwhile, due to wide operation, the air flow speed difference between the two ends of the machine and the middle position is large, and the air speed is unstable.

3. The existing air curtain device is huge in structure, an axial flow fan needs to be installed at a higher position to realize the transmission of air flow, the higher position is installed, meanwhile, the center of gravity of plant protection operation equipment is higher, particularly high-ground-clearance operation machinery easily forms side turning on a land with a larger gradient, and the safety of the equipment and personnel is seriously affected.

4. Along with the development of intelligent agricultural machinery equipment, the energy density of new forms of energy agricultural machinery is limited, and traditional air curtain device is owing to do not adopt comparatively reasonable aerodynamic structure, needs the air more, and the power consumption is great, has influenced the operation time of advancing into ground of agricultural machinery.

5. To current patent product or technique based on the design of coanda effect, have certain better effect in its technical field, but in agricultural machine's plant protection machines, need consider its mounting means, later maintenance nature, expansibility, commonality, broad width operation, atmospheric pressure stability, the characteristics of air current stability can not satisfy the requirement of plant protection operation.

Disclosure of Invention

The invention aims to overcome the defects, and provides an air curtain device capable of being assembled in a modularized mode, which can be installed at the front end or the rear end of a walking agricultural machine tool hanging frame, the air curtain designed according to the coanda effect has good airflow direction consistency and good airflow concentration, the drifting of liquid medicine is reduced, the installation gravity center of the whole air curtain device is lower, an air curtain pipe designed according to the coanda effect is adopted, the air curtain pipe has the function of accelerating peripheral airflow according to the principle of amplifying the air, the air inlet is greatly reduced, and therefore, the energy consumption is reduced.

The technical scheme of the invention is as follows:

the utility model provides an air curtain device of broad width plant protection operation which characterized by: the air curtain pipe is divided into a left air curtain pipe and a right air curtain pipe by designing the interface direction which is convenient for disassembly and assembly, the left air curtain pipe and the right air curtain pipe are connected together by the middle air curtain pipe, because of wide operation, the machine tool needs to fold the device in the walking process, and the device is convenient to fold, the pipe plug is arranged at the terminal of the air curtain pipe for sealing aiming at different operation sites and operation modes, at the air outlet department of air curtain pipe, the width of mountable sealing plug strip restriction air current, in order to ensure the energy saving consumption of very big degree, the inner wall of air curtain pipe and the inner chamber binary channels of frame, can play the effect of voltage-sharing uniform velocity, thereby guarantee the machines and tools at the broad width operation in-process, realize the uniform velocity of air current exit, the voltage-sharing, guarantee the homogeneity of liquid medicine spraying, the air curtain pipe is connected with side arm support or built-in frame through air curtain pipe fixed bolster, the width of air curtain pipe is sprayed the breadth according to the liquid medicine, the frame width, fan-shaped shower nozzle effective action scope, the crop row spacing designs, the air current direction that the air curtain pipe produced is parallel with fan-shaped spray head's jet plane, thereby make the medicine drip with higher speed under high velocity stream's effect and subside, reduce the drift.

The invention also comprises the leaving direction of the air flow and the air curtain pipe, which is vertical to the ground, in order to reduce the influence of the bracket on the air flow acceleration effect of the air curtain pipe, the air curtain pipe fixing bracket is of a thin plate combined type and is of a hollow structure, thereby avoiding the influence on the air flow caused by a link structure.

The invention has the advantages that:

1. the air flow direction is parallel to the sector of the liquid medicine, the acceleration air flow generated by the coanda effect is more concentrated, the sedimentation speed of the liquid medicine drops is higher, and the drift of the liquid medicine is reduced.

2. The width design of the air outlet designed based on the coanda effect is designed according to the transverse width of the fan-shaped spray head, and the acceleration effect of the wind speed can reach 10 times under the wide-range operation condition.

3. Overall structure is simple, and the installation of being convenient for is focused on, and the modularization air curtain pipe later maintenance of being convenient for, and the commonality is good, also can be applicable to the fan-shaped medicine operation of spouting of small-size.

Drawings

FIG. 1 is an overall assembly drawing of the inventive device

FIG. 2 is a partial enlarged view of FIG. 1

FIG. 3 is a cross-sectional view of FIG. 2

FIG. 4 is a partial enlarged view of FIG. 3

FIG. 5 is an exploded view of the assembly of key components of the air curtain

Detailed Description

The air curtain device is further described with reference to fig. 1 to 5: an air curtain device for wide-width plant protection operation comprises a fan 1, a fan air supply pipe 2, a middle-placed frame 3, an air outlet pipe 4, an air outlet pipe joint 5, a middle-placed air curtain pipe 6, a right-placed air curtain pipe 7, a left-placed air curtain pipe 8, a left-placed air curtain pipe plug 9, a right-placed air curtain pipe plug 10, a sealing plug strip 11, an air curtain pipe fixing support 12, a frame air pipe 13, a side arm support 14 and a fan-shaped spraying unit assembly 15.

Fan 1 fix on the extension platform on putting frame 3 in through the bolt, the exit of fan 1 meets with fan blast pipe 2, fan blast pipe 2 is connected with the bottom interface on putting frame 3 in, make the high-speed air current in the fan and the upper portion crossbeam UNICOM of frame, the air current in the crossbeam gets into through going out tuber pipe 4 and puts wind curtain pipe 6, right side air curtain pipe 7, left air curtain pipe 8 in, put wind curtain pipe 6 in and connect with going out tuber pipe 4 through going out tuber pipe joint 5, and keep the sealed of pipeline, similarly, all install air-out pipe joint 5 and connect with going out tuber pipe 4 on right side air curtain pipe 7, the left air curtain pipe 8.

The middle air curtain pipe 6, the right air curtain pipe 7, the left air curtain pipe 8 and the middle rack 3 are fixed through an air curtain pipe fixing support 12, and the right air curtain pipe 7, the left air curtain pipe 8 and the side arm support 14 are also fixed through the air curtain pipe fixing support 12.

The side arm bracket 14 is connected with the middle rack 3 through a rack air pipe 13.

The middle air curtain pipe 6, the right air curtain pipe 7 and the left air curtain pipe 8 are connected with the fan-shaped spraying unit assembly 15 through the air curtain pipe fixing support 12 under the flow velocity positions where high-speed air flow is generated in the working process, so that the speed-increasing air flow generated by the middle air curtain pipe 6, the right air curtain pipe 7 and the left air curtain pipe 8 surrounds the medicine drop fan surface sprayed by the fan-shaped spraying unit assembly 15, and the speed-increasing effect of the air flow is achieved.

The left end on the right air curtain pipe 7 is provided with a buckle which is connected with the right end of the middle air curtain pipe 6 or the right end of the right air curtain pipe 7 or connected with the middle air curtain pipe 6, the right air curtain pipe 7 and the left air curtain pipe 8 are fixedly connected through tight fit, and the installation ports of the right air curtain pipe 7 and the left air curtain pipe 8 are respectively sealed transversely through a right air curtain pipe plug 10 and a left air curtain pipe plug 9.

The middle air curtain pipe 6, the right air curtain pipe 7 and the left air curtain pipe 8 can be used for installing the position and the length of the sealing filler strip 11 according to the size of the sector of the medicine drops sprayed by the sector spraying unit assembly 15 and the requirements of an operation object.

Claims

1. The air curtain device for wide-width plant protection operation is characterized by comprising a fan (1), a fan air supply pipe (2), a middle-arranged rack (3), an air outlet pipe (4), an air outlet pipe joint (5), a sectional middle-arranged air curtain pipe (6) designed according to the coanda effect, a right-arranged air curtain pipe (7), a left-arranged air curtain pipe (8), a left-arranged air curtain pipe plug (9), a right-arranged air curtain pipe plug (10), a sealing plug strip (11) for transverse sealing, an air curtain pipe fixing support (12) for fixing, a rack air pipe (13), a side arm support (14) and a fan-shaped spraying unit assembly (15), wherein air flow generated by the fan (1) enters the middle-arranged rack (3) through the air outlet pipe (4), enters the middle-arranged air curtain pipe (6), the right-arranged air curtain pipe (7) and the left-arranged air curtain pipe (8) after the side arm support (14), the air curtain pipe (6) and the left-arranged air, The speed-increasing air flow generated by the right air curtain pipe (7) and the left air curtain pipe (8) surrounds the sector of the medicine drop sprayed by the sector spraying unit assembly (15), and the included angle between the sector and the flow direction of the speed-increasing air flow is 0 degree.

2. The center air curtain pipe (6), the right air curtain pipe (7) and the left air curtain pipe (8) as claimed in claim 1, wherein the center air curtain pipe, the right air curtain pipe and the left air curtain pipe (8) are connected in an interference fit manner through a buckle to form a transverse air flow seal, the center air curtain pipe, the right air curtain pipe and the left air curtain pipe are assembled and installed according to the width of a machine, the planting mode of crops and the operation mode to form a wide operation, the operation width can be changed by increasing or decreasing the number of the right air curtain pipe (7) and the left air curtain pipe (8) according to the operation requirement, and the center air curtain pipe, the right air curtain pipe plug (10) and the left air.

3. The middle air curtain pipe (6), the right air curtain pipe (7) and the left air curtain pipe of claim 1 can limit the high-speed airflow outflow position through the sealing plug strip (11).