Problem Statement
Problem Statement
Problem Statement
Insecticides or pesticides, a man made or natural preparation are used to kill insects or
otherwise control their reproduction. These herbicides, pesticides, and fertilizers are applied to
agricultural crops with the help of a special device known as a "Sprayer," sprayer provides
optimum performance with minimum efforts. The invention of a sprayer, pesticides, fertilizers,
bring revolution in the agriculture or horticulture sector especially by the invention of
sprayers, enable farmers to obtain maximum agricultural output. But the existing sprayers has
certain drawbacks like In conventional type pesticide sprayer, the heavy tank containing
pesticide is carried by the farmer on his back and requires a lot of human efforts for spraying.
For spraying out the pesticide farmer needs to hold the nozzle in the desired direction.
Another type sprayer is fuel operated and requires expensive fuel i.e. Diesel or petrol. Thus the
load on back of the farmer increases causes health issues.Such problems can be overcome by
manually operated multi-nozzle sprayer as discussed in this project.
Existing Solution Available for Problem Statement:
B.Weeding :
Weed is a plant that competes with crops for water, light, and nutrients. This can reduce crop
production and decrease the value of land, increase cost of cleaning. So weeding is essential
Weeding is the removal of unwanted plants in the field. It is the most difficult tasks in agriculture.
Traditional weeding process is costly and time consuming. Manual weeding process includes a lot
of labour. Mechanical weeding is effective, safe and it minimizes hard work and keeps the soil
surface loose ensuring soil aeration. These mechanisms contribute significantly to safe food
production.
But all the existing solutions has one or the other drawback ,
Concept Idea of Product :
Detailed concept:-
Working Principle:
● Motion transmission by chain and sprockets arrangement.
● Slider crank mechanism.
A Hand Operated Knapsack Sprayer of capacity 16L is used which stores the pesticide.
It is based on principle of a reciprocating compressor.A
reciprocating compressor or piston compressor is
a positive-displacement compressor that uses pistons driven by a crankshaft to deliver gases at
high pressure. The intake gas enters the suction manifold, then flows into the compression
cylinder where it gets compressed by a piston driven in a reciprocating motion via a crankshaft,
and is then discharged.
Working:-
:
The operator grabs the handle and pulls the trolley forward.
● As trolley moves forward, the wheel rotates in anti-clockwise direction.
● As sprocket is mounted on same shaft of wheel, it also rotates in anticlockwise direction.
● This motion is transferred to crank via chain drive arrangement and crank rotates
anticlockwise as well.
● This will reciprocate the piston via connecting rod and builds up the pressure.
● During the upward motion of the connecting rod the pesticide is drawn into the pump
and during the downward motion of connecting rod the pesticide is forced to the delivery
valve, the delivery is connected to the pipe carrying the number of nozzles
● Thus the pesticide is sprayed.
● Height and angle of the nozzle bar can be adjusted by screw locking , which can be done
manually.
2d image of the product:
Isometric View Of Model
IMAGES OF THE COMPONENTS USED:-
Frame:-
Chain Sprocket:-
Driven Sprocket:-
Bucket:-
Tank Piston Assembly:-
Tank Holder:-
Nozzle bar:-
Wheel:-
Connecting Rod:-
CHAIN SPROCKET MOTION:-
Animation Video:-
Sr.N COMPONENTS DIMENSIONS MATERIAL
o NAME USED
1 Frame 2530*870*410mm Aluminium
● Design can be optimized to reduce in size and save materials and thus reducing costs.
● More nozzles can be added.
● Mechanism can be added to increase the height of the nozzle rather than doing it manually.
● Two more wheels can be added to the frame so the farmer can directly push the vehicle
without lifting it and lift while turning the vehicle.
● Tank Size can be increased by proportionately changing the frame dimensions.
DESIGN CALCULATIONS:- 1.Motion Transmission
Formulas For Chain and Sprocket:
L = {P(T1+T2)/2 + 2m + [[1/sin(180/T1)] - [1/sin(180/T2)]]^2/4m }
D=P/sin(180/T)
Sprocket ratio(R) = no. of teeth on the driving sprocket/no. of teeth on the driven sprocket
R=T1/T2 [T1>T2]
T1=62
T2=31
R=2
D1=324mm
D2=162mm
P=0.625in
x=520mm
L=1750mm
No. of links= 58
2.Synthesis of Slider crank mechanism
Slider crank inversion 1 is used in this project.
Rotary motion from Driven sprocket is given to the crank which using slider crank mechanism
gets converted into reciprocating motion of piston.
Synthesis of Slider Crank was done using “Two point synthesis Output Rocker Motion”on 2D
CAD Drafting.
Following are the results:
Piston length=120mm
Hence, Crank= 60mm.
Coupler (Connecting Rod) = 675mm
Fixed link=530mm
3.Calculation of Wheel Diameter.
Diameter of wheel = 50 cm