The Base skid is constructed of heavy section Universal Column with the Vertical ‘A’ Frame section situated at one end, Winch Platforms and the Hydraulic Power Unit at the other. Hydraulic Cylinders are fixed to the base clevises to operate the ‘A’ Frame. These can be fully retracted to a safe shipping position without the need for removal.
The base frame is covered with a light weight, non-slip, corrosion proof composite material grating. The winches are integrally piped in 316 Stainless Steel to the hydraulic control valve block, which in turn are connected directly to the supply and return hydraulic supplies of the winches
The base skid is additionally fitted with two inward opening safety gates, which have integrated 316 stainless steel multi rollers fitted for umbilical handling.
The ‘A’ Frame is moved by hydraulic cylinders to the inboard or outboard positions by operation of the proportional hydraulic control valves. The ‘A’ Frame is fitted with two central sheaves, where the lift wire is positioned for lifting and lowering the dive baskets. Additionally are two sheaves for the clump weight wires and two Becket Lugs for connection of the clump weight wire end termination. The head of the ‘A’ Frame also incorporates a spotlight for illumination during hours of darkness and an electrically interlocked chandelier which activates a failsafe lock-out system when the basket is raised above the preset level.
There are two pre-fabricated Clump Weights which allows the Clump Weight wire to be doubled weaved through the sheaves situated at each end of the Clump Weight. This allows the free travel of the Clump Weight in the event of an emergency recovery of the two diver basket. The Clumps Weights are of different sizes which relate to the primary or secondary basket size.
Triple Electric Hydraulic Power Unit (HPU)
The Triple Hydraulic Power pack is equipped with three separate hydraulic reservoirs, return line filters, sight glasses and fill point. The skid is fitted with three electric motors, each with 22kW motors, all with fixed displacement, vane pumps. The third electrically driven hydraulic powerpack acts as an independent secondary supply in the event of failure the two primary units. The hydraulic circuitry is fitted with non-return valves and over-pressurisation safety valves which operate as and when required during the operation of the diver’s LARS system. The unit is fitted with a unique single one lever change over valve, which is switched very simply from the primary to the secondary hydraulic system circuits, without the need to disconnect or operate multiple changeover valves.
Diving Basket / Cage
Primary Dive Basket
This is a 1250mm x 900mm Diving Cage with overhead protective frame suitable for two divers. It incorporates 2 x 50 litre high pressure emergency air cylinders, Clump Weight wire guides and diver access points from both sides. Hand hold points are situated within the cage and the base of the basket is fitted with a light weight, non-slip corrosion proof composite type material grating. Stainless steel mesh cladding is used to enclose the top and sides of the basket. Stainless steel chains, carabiners and nuts and bolts are used as standard for the assembly of this basket. The main structure of the basket is made up of a heavy duty tubular section. The main lift wire connection point incorporates two additional emergency lift points.
Secondary Dive Basket
This is a 1250mm x 670mm Diving Cage with overhead protective frame suitable for one diver. It incorporates Clump Weight wire guides and diver access points from both sides. Hand hold points are situated within the cage and the base of the basket is fitted with a light weight, non-slip corrosion proof composite type material grating. Stainless steel mesh cladding is used to enclose the top and two sides of the basket. Stainless steel chains, carabiners and nuts and bolts are used as standard for the assembly of this basket. The main structure of the basket is made up of a heavy duty tubular section. The main lift wire connection point incorporates two additional emergency lift points.
All four hydraulic Manriding Winches are planetary type Winches of high performance with many years of service. The Winches are powered by high efficiency gear motors designed specifically for applications to provide smooth application. The motor torque is transmitted and multiplied by the high efficient gear train within the Winch drums. All rotating components are supported by high anti-friction bearings and run in oil to minimise friction.
The load control system is maintained by a patented brake valve. The brake valve is also backed up by an internal multi-disc hydraulic release safety brake. Additionally an overrun clutch permits a free rotation through the brake in the hoisting direction with immediate lock-up when the hoisting operation is completed.
Four hydraulic Manriding Winches are fitted to the SMP Dual Basket LARS. The Winches are fitted with Bridon Dyform rotational resistant wire ropes, which are crush resistant and reduce sheave wear.
Portable Remote Electro / Hydraulic Console – Portable control console for operation of the system remotely.