Spray Control Technologies: Parts

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Spray Control TechnologiesParts Operation
By Dan Frank 7/5/2002
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Front Face of a Sprayer
Boom
Tank
Pump
Pressurized liquid output Line
Radar detector
Liquid Intake line
Three Point Hitch Assembly
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Sprayer Pumps

• Hypro Series Roller Pump
• 12 GPM _at_ 540 RPM
• Pumps perform an integral role in liquid
  applications systems
• Takes liquid from tank
• Pressurizes the liquid
• Pressurized liquid is sent to the booms
• There are many types of pumps available for
  agricultural use.
• The two most common for sprayers are
• Roller Pumps
• Diaphragm Pumps

Pressurized Liquid Output
Liquid Intake
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Radar Detector

• Purpose of a Radar Detector
• Used to sense speed
• Why is speed important?
• application rate is a function of the flow rate,
  the nozzle spacing, and the speed!

Only used on Electronic Rate Control Systems and
Variable Rate Systems
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Liquid Storage Tank

• The tank contains the liquid to be applied
• The material to be applied is mixed with water in
  the tank

Tank fill spout
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Liquid Intake Line (from Tank to Pump)
To pump
From Tank
Tank shut-off Valve
Filter / Strainer
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Back Side of A Sprayer
Flow Meter
Pressure Relief Valve
Boom height Adjustment
Boom
Boom Hose
Nozzle Assembly
Flow Control valve
Boom Valves
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Pressure Relief Valve

• The Pressure Relief Valve
• meters the flow into the boom system
• Sends excess liquid back to the tank
• liquid return helps to agitate the liquid stored
  in the tank (keeps the solution well mixed.

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Flow Meter

• Purpose of the Flow Meter
• To sense the amount of liquid traveling through
  the system
• Used on Electronic Rate Control Systems and
  Variable Rate Systems

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Flow Control Valve

• Purpose of the Flow Control Valve
• To control the amount of liquid traveling to the
  system
• Used on Electronic Rate Control Systems and
  Variable Rate Systems

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Boom Valves

• Purpose of the boom Valve
• to turn a boom section on or off to allow or
  disallow flow to a particular boom section
• Electronic Boom Valves
• shown in picture
• Generally used on Electronic Rate Control or
  Variable Rate Systems
• Controlled by a switch in the Cab

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Boom Sections
Boom Sections hold the nozzle assemblies. The
sections are connected by a breakaway hinge.
Breakaway Hinge Allows the boom section to bend,
reducing damage from accidental entanglement.
Nozzle Assembly Holds the nozzle (tip) that
atomizes the liquid.
-Many types of Assemblies and tips (dependant
upon application).
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Boom Sections

• Purpose of Nozzle Assemblies and Tips (nozzles)
• Nozzle Assemblies hold the tips to the boom and
  allow water to flow to the tip.
• There are several types of nozzle assemblies
• Examples Corner, Tee, etc.
• Examples With check valve, or without
• Check valves are used to eliminate issues related
  to chemical drip after the boom section is turned
  off
• Tips atomize, meter, and distribute the liquid
  evenly across the field

Tee type assembly
Check Valve
Housing
Washer (Gasket)
Tip
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Cab Components

• Purpose of Cab Components
• To allow easy access to prayer information
• To provide a convenient method for changing spray
  parameters
• Rate Controller
• Raven SCS 660
• Allows easy setup for electronic rate control
  activities.
• Controls sprayer components. i.e. Flow control
  valve and boom valves
• Electronic Rate Control
• Data Logger/ Prescription controller
• Sends target values to the rate controller
• Logs data from the rate controller
• Variable Rate Control

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Sprayer Summary
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System View
Electronic Rate Control Sprayer Rate
Controller Tank Shut-off Valve Filter Pump Pressur
e Relief Valve Flow meter Flow Control Valve Boom
Valve Nozzles
Variable Rate Sprayer Data Logger/ Prescription
Controller Rate Controller Tank Shut-off
Valve Filter Pump Pressure Relief Valve Flow
meter Flow Control Valve Boom Valve Nozzles
Legend
Liquid Flow
Data Flow
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Component Breakdown Flow Meter

• Flow Meter
• Measures the amount of water traveling through
  the system
• Uses a turbine blade to rotate the shaft
• The shaft has magnetic pickups
• The magnetic pickups count the number of
  revolutions
• This is calibrated to give the flow rate

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Component Breakdown Flow Meter

• Flow Control Valve
• Determines the amount of liquid to go to the boom
  Valves.
• Uses a butterfly valve to increase/ decrease flow
• As the valve closes less liquid can pa through
• As the valve opens more liquid passes through

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Component Breakdown Boom Valves

• Boom Valves
• These Valves are used to turn sections of the
  boom on/off.
• Each valve controls 1 boom section
• There are 3 valves on this component it can
  control up to three boom sections
• There are generally between 1 and 7 boom sections
  on a sprayer.
• The longer the boom width, the more sections
• The controller needs to be able to control at
  least as many valves as there are boom sections
  on the sprayer.

Outlet
Inlet