The energy contained within a pressure hose, in case of disconnection from the fitting, can be very dangerous to anyone or anything in its vicinity.

The system is comprised of two parts – a hose collar and a cable assembly. The collar is selected based on the outside diameter of the hose, while the cable assembly is selected based on the type of hose connection. Both the hose collar and the cable assembly work together to keep the hose from whipping if the hose disconnects from the fitting.

This is important for protecting the equipment and nearby personnel.

„In some jurisdictions hose whip restraints are required by law where there is risk to personnel from whipping hoses.”
– IHSA (International Hydraulic Safety Authority)

HOW DOES IT WORK?

DISENGAGEMENT

The Hose Retention system does not operate during the moments of disengagiement of the flexible hose, but, if applied correctly, it ensures that the hose is fully disengaged from the ferrule that restrains it. During this step, the flexible hose gains velocity and power due to the pressure increase of the oil contained therein.

RELEASE  OF PRESSURE

During this step, the pressurised oil exits from the flexible hose. The hose begins to release the energy contained therein, and gains considerable velocity, triggering a hazardous “whip effect” which is very dangerous to anyone or anything in its vicinity.

RESTRAINT

Once the hose has been disengaged and the pressure released, the flexible hose can be restrained. This is where the system gets into operation: the stainless-steel cable is tensioned and deformed while the plate cuts into the rubber of the hose, preventing the clamp, firmly attached to the hose, from disengaging. The hose clamp and plate start to deform in turn, elastically absorbing the force released from the travel of the flexible hose.
This is a critical step which occurs within just a few seconds in which the materials and the components of the system, previously sized and tested, stop the dangerous travel of the flexible hose.

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The baler can be provided optionally with a sound and light signal that also comes on when the baler suffers a breakdown (95 dB short pulsating signal).

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Maintenance platforms allow safe access to the hopper inspection door and to the gear box of the conveyor belt and can be incorporated as part of the machine supply.

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This is a retractable safety device which is anchored to a fixed element and connected to the worker with a safety harness.

When a fall occurs, the harness becomes taut and the Fall Protection Device detects this tension.

This device is also responsible for sending the stop signal to the plant machinery, causing a quick halt in the functioning of the machine.

The device must be connected to the fixed mooring point by means of the bearing swivel and the connector. Naturally, the fixed clamping point must be located above the user so that the force of gravity of the fall itself causes the desired effect of generating the sudden tension in the harness. In addition, the connection must have a minimum static resistance of 12 kN.

The shape and structure of the fixed clamping point should be enough to prevent the device’s automatic disconnection and slippage. The use of marked and certified fixed mooring points is recommended, according to the European standard EN795.

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By taking additional precautionary measures ANIS has provided a worker protection system for operating in the various hazardous areas found around the channel baling presses and the conveyors.

This system is designed to complement the safety measures already in place in all conveyor systems and additionally protects personnel against fatal accidents by automatically halting the conveyor belts.

The ANIS CONVEYOR wireless worker protection system is an electronic security system designed to halt a conveyor belt (connected to a security antenna) as soon as a person wearing the signal-emitting tag enters a hazardous area.

SYSTEM DESCRIPTION

Channel baling presses are fed by huge conveyor belts. There is a risk that a person falls on it and gets drawn into the baling press. To avoid that, an antenna-module is installed over the conveyor belt, which supervises the whole width of the conveyor belt. The person carries a safety device, on either their arm or clothes. If the safety device gets into the magnet field, it is immediately detected, and the system stops automatically.

Advantages:

• improves overall security and creates safer working practices for staff
• offers personnel the greatest possible protection through the machine stop system, which will operate regardless of employee’s awareness
• the system complies with international safety standards (EN 16252: 2013).
• can be installed on new and existing devices
• all settings can be adapted to specific customer situations and provide a tailor-made solution for protecting hazardous areas
• simplifies your security system with a single system for conveyors, balers and shredders

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The key-operated inspection door safety lock system (castle-lock) allows safe machine maintenance and cleaning. The safety keys are released only when the electrical control panel is switched off.

Interlocks may take the form of electric switching and/or a mechanical ‘trapped key’ system fit both types where appropriate.

The feed hopper or press chamber door is equipped with a double safety feature: this door is locked with a second key which must be taken by the employee when entering the feed chute. Only when the employee has left the feed chute and installed the second key, can the door be closed again. Naturally, the baler is equipped with several emergency stop switches and moving parts are protected by covers.

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