What Is a Lally Column?

The bollard pulling force belongs to the mooring equipment, that is, the ship is anchored at a designated position by a rope or an anchor chain. The entry and exit of ships and the operation of docking are inseparable from the mooring equipment. Mooring equipment includes various cables, bollards, mooring pontoons, etc. Usually ship mooring equipment is installed at the bow and stern.

Usually ship mooring equipment is installed at the bow and stern. The choice of the length and thickness of the mooring line should take into account the changes in the draught of the ship after unloading and the factors such as tidal, wind, and tidal currents. Especially in harbors where waves or tidal waves are easy to enter, during extremely bad weather such as typhoons or high tides, mooring lines can easily break and cause ships to hit the docks or ground the ships. When the ship is moored near the dock,

At present, there are many mooring systems for positioning floating structures. According to the mooring method, they can be divided into catenary mooring, catenary anchor leg mooring, single anchor leg mooring, mooring pile and buffer mooring. According to the number of mooring lines, it can be divided into single-point mooring system and multi-point mooring system. Generally speaking, the way of mooring is determined according to the conditions of the mooring force, the water depth, the length of the mooring line, whether to configure the floating body, and the terrain. The current mooring system mainly adopts a multi-point mooring system. The steel cables used are generally catenary mooring systems, and other composite materials such as nylon ropes are generally selected for semi-tensioned mooring systems. ^[1]

Scientific management of equipment for bollard pull

Among the many ship mooring devices, there are many equipment that will affect the safe mooring, such as: ropes, cable machines and cable guides. Only by managing these devices can the mooring safety be guaranteed. The first thing to do is to Standard management of the manuals and quality inspection certificates of all equipment, because these materials are the basis for future scientific research and investigation, they can provide some necessary data, such as: the size and size of the hull, breaking capacity, large-scale to withstand These data are also the basis for ensuring the quality of the product. The relevant national institutions will request these information when investigating the quality of ship equipment. Therefore, special crew members must be used to manage these credentials and ensure that these data are related to The equipment can be regulated and maintained in a safe and orderly manner to avoid the chaos in normal use.

Periodic testing of bollard pull

When the ship is docked, the tens of thousands of large wheels are fixed on the wharf by the cables in front and rear of the ship, and one end of the ship is fixed on the cable pile. One side of the ship is the winch of the winch. In order to secure the winch by the braking force of the brake belt, once the actual force reaches the required standard, for example, when the sea wind roars, the winch may be driven away by the wind, causing the ship to move. When the weather is bad, even ship damage and cargo damage may occur. Therefore, the braking force of the winch must be adjusted by means of periodic testing. The braking force should be used to determine how the crew should bring cables and how many ropes they need to wear. The power situation determines whether this winch system needs to be repaired.

Bollard Pull Repair and Maintenance

In order to ensure that the entire ship can operate in a good state and ensure its safe operation, periodic maintenance and maintenance are required. Only in this way can the entire ship equipment be able to operate well. ^[3]