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Grid replacement for trapdoors
Aggregate Industries UK > Croft Quarry, Leicestershire > 01455 288296
maintenance & Housekeeping: 41
The screenhouse trapdoors at Croft provide access to aggregate storage
bins some 40 feet below. Built originally in wood, they no longer fitted
perfectly due to warping. When opened during clean-up operations they
posed the risk for slips and trips with a potential major fall through the
metre square trapdoor. The problem has been overcome by installing
metal grids which allow stone to be dropped into the bin without having
to be lifted.
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Sliding beam aids changing wash barrel
wheels
CEMEX UK > Postern Park Quarry, Kent > 01732 366855
At Postern Park Quarry (near Tonbridge), a moveable overhead beam has been installed to give
mechanised lifting assistance to either side of their wash barrel, to ease replacement of wash barrel
wheels. Torque wrenches are used on the wheel studs to prevent over-tightening and strain on the fitter.
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Inspecting bucket elevators
Tarmac Central > Ballidon Quarry, Derbyshire > 01335 390301
Tarmac Central’s Ballidon Quarry is situated near Ashbourne, the southerly gateway to
Derbyshire’s Peak District.
Re-evaluation of working practices had highlighted a heightened risk whilst inspecting bucket chains, with
elevator panels removed. The risk of entrapment was potentially high as the “inching” button could be
held/depressed, which would enable the elevator to turn at full speed.
To remove the need for “live working”, the appropriate panels of the elevator were replaced by purposemade
mesh guards. Necessary repairs are then carried out under isolation procedures.
Return roller replacement tool
Purfleet Aggregates > Essex > 01708 865410
on
video
At the Hanson / CEMEX joint venture wharf on the Thames
at Purfleet, employees have designed and manufactured
a unique and inexpensive tool that greatly enhances the
ease and safety of replacing return rollers on an elevated
conveyor.
The simple tool removes the need to climb under or over
the frame to lift out the roller, preventing a potential fallfrom-height
hazard and reducing manual handling risks.
The tool was designed by the site foreman and made by
the fitter in the workshop. Costs were minimal, as existing
materials were used. Using the tool is safe and simple:
once the belt is lifted away from the rollers to provide access, a flexible hook attaches to the near side of
the conveyor frame and the other end supports the roller as it is levered out of its mounting. The operator
then simply grasps the roller and manoeuvres it to allow him to lift it over the frame with ease. The
reverse operation is used to replace the roller.