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Overview

The "Accu-fire" broadacre firelighter is an appliance that allows agriculture land managers to undertake paddock burning operations to facilitate the removal of excessive combustible stubble material by applying fire in a controlled manner, from a moving vehicle. The actions of lighting fire and the person in control are located apart. Other lighters available are for smaller area treatment and are hand held or hand operated and function at a slow speed.


Key Components and their Application

Fuel Tank
A boat fuel tank stores the liquid accelerant used for the combustable fuel source.
Gas Bottle
A propane filled gas bottle is used as the storage vessel for the firelighters ignition fuel.
Pump
An electrical pump and solenoid assembly is used to apply the flow and stop mechanism to the liquid accelerant.
Chassis
The chassis of the firelighter houses the key components of the firelighter.
Swingarm and Clamp
The swingarm is the mounting apparatus for 2 stainless steel lances and directs the pipes approximately 30 to 40cm off the ground. The first pipe carries the liquid accelerant, the second carries the propane gas. The Clamp mounts the swingarm to the side of the utility vehicle.

Firelighter Layout

The key components of the firelighter are secured together.

  1. The gas bottle, fuel tank and pump housing are mounted onto the chassis and separated by two steel firewalls
  2. A 2 metre long liquid accelerant hose and a gas hose run from the pump housing area to the remote swingarm assembly on the side of the utility vehicle.
  3. Here the hoses mount onto the 2 stainless steel lances, which are secured together on the swingarm. The 750mm long steel lances carry the liquid accelerant and the gas to a point 300mm from the ground.
  4. From the pump housing 2core electrical wiring runs to the cabin of the utility vehicle.

How it works

To prepare the “Accu-fire” broadacre firelighter unit the swingarm is pivoted from its horizontal transport position to the lowered working position approximately 300mm from the ground.

Propane gas is turned on at the gas bottle and at the top of the gas lance. Gas flowing through the nozzle at the bottom of the lance is lit. The flame generated is a pilot flame and stays ignited through the complete burning procedure. This pilot flame does not light the combustible paddock material.

The firelighter is now ready to engage. The direction of the vehicle is going to travel and speed (0 to 40kmh) is chosen. The switch turning on the electric pump and shut off solenoid is activated.

The liquid accelerant pumps from the fuel tank through the 2 metre hose to the remote swingarm and clamp assembly where at the point 300 to 400mm from the ground the liquid accelerant passes through a small hole, streaming the liquid through the already ignited gas flame.

The now, ignited liquid lands on the ground, engaging the combustible material to be removed.

At the point chosen to stop burning the paddock material, the cab switch is de activated, turning off the liquid pump and cutoff solenoid which halts the burning process. The switch can be turned on again at any time to restart the burning process.