Wire rope electric hoists are currently popular products among small and light lifting equipment, mainly due to their strong carrying capacity and efficiency. Friends who know about wire rope electric hoists should know that its main traction part is wire rope. Compared with traditional lifting chains, wire ropes run more smoothly and there is no need to worry about chain breakage.
The wire rope specifications of each electric hoist are not uniform. The wire rope specifications are determined according to the rated load of the electric hoist. The matching specifications will inevitably increase the wire rope diameter with the rated load of the electric hoist. Only in this way can the safety of lifting operations be guaranteed. So what are these corresponding specifications?
The rated loads of conventional electric wire rope hoists are mainly divided into 1 ton, 2 tons, 3 tons, 5 tons, 10 tons, and 20 tons. They correspond to the specifications of wire ropes of 7.7mm, 11mm, 13mm, 15mm, 17.5mm, and 19.5mm respectively. Of course, the wire rope specifications of 0.5 ton electric wire rope hoists are 4.76mm or 5mm. These data are obtained through rigorous scientific data analysis and are also the best state in lifting operations.
It can be seen that the safety of using wire rope electric hoists is not only determined by regular operation and maintenance, but also by the matching of wire rope and electric hoist. Therefore, we remind you that when your electric hoist needs to be replaced with a wire rope, you must understand that it matches the wire rope specifications to prevent safety hazards caused by electric hoist lifting operations.
Wire ropes are widely used in many industrial applications, especially in lifting equipment, cranes, electric hoists and conveying systems. Due to its special function of carrying heavy objects, wire ropes will face various problems such as wear, corrosion, fatigue, etc. during long-term use, so the protection of wire ropes is crucial. The following are several common methods of wire rope protection:
1. Coating protection
Lubricant coating:
Applying lubricant is one of the most common ways to protect wire ropes. Lubricants can reduce the friction between the wire rope and the external friction surface, reduce wear, and prevent moisture and corrosive substances from entering the wire rope, thereby avoiding corrosion.
Anti-rust coating:
Some wire ropes are coated with anti-rust coatings, such as galvanized coatings or other anti-corrosion coatings, to increase their corrosion resistance. The outer layer of galvanized wire ropes is coated with a layer of zinc, which makes the wire rope less likely to rust in a humid environment and prolongs its service life.
2. External protective sleeve
PVC or rubber protective sleeve:
Wrapping a soft plastic or rubber protective sleeve on the outside of the wire rope not only prevents the wire rope from direct contact with external substances, but also effectively prevents the outer layer of the wire rope from being worn due to frequent friction. The protective sleeve also prevents the wire rope from being invaded by dust, chemicals or moisture in the external environment.
Wire rope casing:
Wire rope casing is usually used in high-intensity applications or harsh environments, and can provide additional protection to prevent the wire rope from breaking or being damaged during frequent use. The casing material is usually a high-strength metal or synthetic material.
3. Anti-corrosion treatment
Hot-dip galvanizing:
After the hot-dip galvanizing treatment, the surface of the wire rope is covered with a layer of zinc, which effectively improves its corrosion resistance and is suitable for highly corrosive environments such as offshore platforms, mines, and chemical plants.
Cold galvanizing:
Cold galvanizing is also a common anti-corrosion method for wire ropes, which is suitable for mildly corrosive environments, but its protective effect is slightly lower than hot-dip galvanizing.
Chrome or copper plating: In some special environments, the wire rope may be chrome or copper plated to improve its corrosion resistance, which is especially effective in chemical processing or marine environments.
4. Proper storage and maintenance
Avoid exposure to moisture: When using the wire rope, try to avoid exposing it to moisture. When storing, the wire rope should be kept in a dry environment to reduce the risk of rust.
Regular inspection and maintenance: Regularly inspect the wire rope, especially check the wear, corrosion or wire breakage of the wire rope. Avoid safety accidents caused by improper use by replacing or repairing damaged wire ropes in time.
Avoid overstretching: Do not leave the wire rope in a stretched state for a long time. Overstretching will cause damage to the internal structure of the wire rope, thereby affecting its service life. Avoid excessive load when using it.
5. Use the right wire rope model
Choose the right wire rope material: Choose the right wire rope according to the use environment. For example, corrosion-resistant wire ropes are suitable for use in chemical environments or offshore operations, while high-strength wire ropes are suitable for lifting equipment that needs to withstand greater loads.
Braiding structure of wire rope:
Different braiding structures (such as three-strand rope, seven-strand rope, etc.) have different effects on the tensile strength, fatigue resistance, wear resistance, etc. of the wire rope. According to actual use needs, choose the appropriate braiding structure of the wire rope.
6. Avoid poor operation
Avoid sharp angles and friction:
During the use of the wire rope, avoid the wire rope passing through sharp angles or sharp objects, as this will cause wear or breakage of the wire rope. Try to avoid friction between the wire rope and uneven surfaces to reduce damage.
