Ipswich Tidal Gate

The Ipswich Tidal Gate is located on the new cut of the River Orwell, on Ipswich waterfront. Qualter Hall were responsible for the MEICA design including the mechanical, electrical and hydraulic equipment.

For the hydraulic equipment scope, Qualter Hall designed and supplied the main HPU with two diesel engines & pumps, each with dual pressure control to raise and lower the gate. We also designed & supplied two emergency HPU’s with diesel engines & pumps complete with GRP housing.  Our scope included three main operating cylinders, (two operational & one spare), 2 latching cylinders & four maintenance cylinders, supply of the system pipework, its installation, pressure testing and flushing.

For the control system supply, the scope included the main MCC and control system architecture based on the Siemens Simatic S7-1500F range of programmable logic controllers, combined with the latest distributed I/O nodes. The Operator is able to interface with the system via two full touch HMI screens, providing continuous diagnostics & alarm functionality along with setpoint adjustment. The operator can initiate any of the barrier functions from either HMI or from the pushbutton controls incorporated within the operator desk.  The control system is connected via an industrial PROFINET network, providing fast & reliable communications for the PLC, I/O nodes and HMIs. The control system also provides a remote connection host such that the Environment Agency can integrate this local telemetry directly into their national system for diagnostics away from the site, allowing the site to be unmanned during periods of low activity with the knowledge that the site is safe, secure & ready for use at short notice.

Hardware delivery & installation was completed during 2017, with testing & commissioning being completed in 2018. Qualter Hall undertook the training of the site operatives and continue to maintain the equipment on behalf of the Client.


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