Outdoor ship cranes need special rust prevention to resist corrosion, extend service life and facilitate grasping performance and application requirements for better operation.
How to solve the problem of loose screws and components after the ship crane operates?
1.Before preparing to lift goods, it is necessary to pay attention to estimating the weight of the goods to be lifted, so as to avoid unnecessary losses.
2. When conducting lifting operations, it is necessary to pay attention to the relationship between the goods to be lifted and the weight that the lifting machine can bear. The goods to be lifted must not exceed its capacity range; otherwise, it will not only affect the working speed and service life of the lifting machine, but also bring stability risks to the lifting operation.
3. Once any loosening of screws or components is detected, they should be inspected and repaired promptly; otherwise, it will affect the working speed of the ship crane and may also cause unnecessary accidental injuries to personnel.
4. Regular oiling of the hoist is necessary to ensure the flexibility of all its parts. If it is not oiled for a long time, the components will rust, and the ship crane will not be able to operate and work flexibly.
5. Generally, the workload of a hoist is quite large. At this time, the usage rate of the machine will be very high, and its components and screws are prone to loosening. Therefore, it is necessary for the staff to conduct regular inspections and maintenance on it.
When a ship crane is in operation, its running mechanism usually only uses four driving and driven wheels. If the lifting capacity is very large during use, the method of adding wheels is often adopted to reduce the wheel pressure. When the number of wheels exceeds four, a hinged balanced frame device needs to be used to evenly distribute the load of the ship crane on each wheel.
The metal structure of the bridge frame of the ship crane is mainly composed of the main beam and the end beam during the manufacturing process. During operation, the two are generally rigidly connected. When in use, wheels are installed at both ends of the end beam to support the bridge frame to run on the elevated structure. The main beam is welded with tracks for the operation of the hoisting trolley. The structural types of the main beams of cable trays are numerous. The more typical ones include box structure, four-truss structure and open-web truss structure.
In many stability accidents of ship cranes, many are caused by hook failures. The open-air operating environment of the equipment requires us to strictly manage its metal components to a certain extent. The hook plays a role in connecting the crane and the load, and its management work needs to be taken seriously.
1.If the lifting height limiter of the hook or the hook locking device malfunctions or is damaged, it must not be used anymore.
2. Casting hooks cannot be used. Hooks can be classified into single hooks and double hooks according to their different shapes. According to the differences in their manufacturing processes, they can be classified into three types: sheet hooks, forged hooks and cast hooks. At present, the common type of hook is forged single hook. Cast hooks are not allowed to be used on cranes. Hooks are generally made of low-carbon steel and carbon alloy steel to solve the problem of cracks.
3. For stability, the hook should be inspected. If any of the above situations are found, it should be scrapped immediately instead of being repaired.
4. Unlicensed operation should be strictly prohibited.
The hydraulic system is a crucial part for all small ship cranes. However, during long-term application, some common faults are also very likely to occur. So, what should be done if the hydraulic transmission system of a small ship crane malfunctions?
1.The gear oil of small ship cranes can be regarded as the "blood night" of hydraulic equipment. Most common faults in hydraulic transmission systems can be identified by inspecting and observing the condition of the gear oil to find out the causes of the faults and then detect them. The gear oil has residues and is cloudy. The water temperature of the gear oil has abnormally risen. The gear oil is too dirty. This situation needs to be checked and resolved regularly by everyone in a timely manner. In case of any abnormality in the hydraulic transmission system of the small ship crane, immediate adjustment is necessary to prevent more serious adverse effects later on. For instance, if there is too much gas in the gear oil, just release the gas. The pipe connection is incorrect. Check it again. Just connect the pipes properly.
2. The sealing of the hydraulic oil pipe of the small ship crane is not tight enough, with gas or steam leakage. The frictional resistance of the hydraulic oil pump suction and delivery oil pipe is large. At this time, it is necessary to clean the body and replace the sealing. Abnormal posture of the hydraulic cylinder, obvious oil leakage, and ineffective sealing of the piston rod or hydraulic cylinder. Dirt and metal shavings can damage the drag surface, and there is gas in the hydraulic cylinder. At this time, it is necessary to replace the seal, repair the drag surface and the exhaust pipe.
3.The main manifestations of abnormal working pressure in the hydraulic transmission system of small ship cranes are that the working pressure cannot rise or fall. Most of the time, such situations are caused by problems in positions such as diesel engines, hydraulic oil pumps, and hydraulic solenoid valves. Damage to the hydraulic cylinder or motor, or the destruction of hydraulic seals, can also cause the system pressure to fail to rise, or if the pressure does rise, it cannot be maintained.
Since ship cranes are usually used outdoors, we also need to pay special attention to doing the corresponding anti-rust work. Only by doing a good job in rust prevention can it be ensured that the entire equipment is protected from rust, thereby extending its service life. At the same time, this also helps us have a good understanding of the performance and application requirements of the equipment, so that we can make good use of them to complete various tasks.
