Precautions for classification, use and procurement of marine ropes

    As we all know, marine ropes are an indispensable part of the normal operation of ships. Although the quality of the ropes will not threaten the safety of navigation, they are essential for the safety of ships berthing and leaving the dock and passing through narrow waterways. So, how to classify marine cables? What issues should we pay attention to during use? And what should I pay attention to when buying?

　　1. Classification of marine ropes: marine ropes can be divided into three strands, six strands, eight strands, twelve strands, etc. from the production process. Eight strands are commonly used in general cargo ships. Marine ropes can be divided into polypropylene filaments, polyester multifilaments, high molecular weight polyethylene, luminous ropes, aramid ropes, chemical fiber networks, nylon monofilament composite ropes, etc. from the production materials. Generally, polypropylene filaments are commonly used on cargo ships. Or polyester multifilament cable.

　　2. Questions to be paid attention to during the use of the rope: the correct use of the rope can not only ensure the safety of the operator, but also prolong the service life of the rope. ① Before use, carefully check the integrity of the cable. If a certain part of the cable is excessively worn or a large number of broken ends, replace the cable in time. Try not to let the cable bear too much tension during use to prevent sudden breakage. . ② The cable crew must be familiar with the types and characteristics of the cable they will operate, and perform targeted operations. For example, the man-made fiber cable will not make a sound before it breaks, and there is no sign that can be seen intuitively. If you operate it It is this kind of cable, so when the cable is stressed, the maximum tensile force of the cable must be well grasped to prevent sudden breakage. ③Sailors with cables must wear helmets, gloves, safety shoes, and work clothes. "Wearing slippers, big shorts, and carrying the cable with bare hands" is not allowed. Many individual sailors in small boats do not pay attention to their own protection. Once an accident occurs, the cable breaks. The huge cable breaking force acts on the broken cable head, and the speed is very fast. , Will threaten your own life safety. ④ Pay attention to the technique when operating the winch. Practice has proved that the main reason for the cable breakage is the continuous impact load. In view of this reason, the personnel who operate the winch cable car must be skilled in operation, minimize the impact load of the rope, and reduce the rope breakage caused by this reason. ⑤The cable crew should be familiar with the gestures and sign language involved in the cable operation process, such as: release, retract, stop, brake, etc. ⑥ Standing requirements: At the location of the rope work area, all personnel are not allowed to stand in the rope loop; all personnel are not allowed to stand in the "rebound zone" of the rope. To summarize the ship's rope operation in one sentence, the crew with good craftsmanship, in a safe working environment, choose safe ropes, use safe machinery and equipment, and use safe operating procedures to safely tie the ship to the dock.

　　3. Precautions for the procurement of marine ropes Marine ropes have a service life. This service life is usually related to the material of the rope, the production process, the frequency of use of the rope, the method of use of the rope, and the daily maintenance of the rope. The usual service life is 2-4 years. When the old rope needs to be replaced with a new one, how do we choose a good rope that is safe, reliable, and has a long service life? ①The choice of material. The tension and abrasion resistance of the same thickness of the rope are large and small. The reason for this situation is the difference of the material. For example, to simply increase the tension of the rope, you can choose a polypropylene filament cable. If you are worried about the rope dragging on the deck It is necessary to add a polyester layer on the outside of the cable to increase the abrasion resistance, that is, the "polyester multifilament" structure is adopted (the inner part is the polypropylene filament that bears the tension, and the outer part is the polyester wrapper to increase the abrasion resistance. ), the use of this technology and material can increase the service life of the rope, usually can be increased by 1 year. ②The choice of brand and ship inspection certificate. Ropes are very important safety equipment on ships. The International Maritime Organization requires marine ropes to be supplied: they must have a classification society certificate. That is to say, when purchasing a rope, be sure to ask the rope manufacturer to issue a classification society certificate. In addition, the brand is also very important when buying a rope. Choosing a rope manufacturer with a long history is very important for the safety and service life of the rope. The quality of the rope produced by a small factory is not good enough. The raw materials are cut corners and the craftsmanship cannot keep up. , The hidden dangers of using such cables on ships are too great. Accidental fractures may cause casualties in addition to collisions between ships and berths. Therefore, the quality of the rope is very important, and you must know the manufacturer in advance.