Shackle

A shackle application:

Shackles are widely used in electricity, metallurgy, petroleum, machinery, railways, chemicals, ports, mines, construction and other industries

Second, shackle use and precautions:

1. The shackle should be smooth and smooth, and no defects such as cracks, sharp edges, and over-burning should be allowed.

2. Cast iron or cast steel shackles are strictly prohibited. The body can be made of forged steel, and the pin can be forged after machining.

3. Drill or weld repairs should not be made on shackles. After the buckle body and the pin are permanently deformed, no repairs are allowed.

4, when used, should check the buckle body and bolt, not serious wear, deformation and fatigue cracks.

5, when used, the lateral spacing must not be pulled, the pin must be inserted into the pin.

6. After the shaft pin is correctly assembled, the width of the buckle body must not be significantly reduced, and the thread connection is good.

7. The use of shackles must not exceed the specified safety load.

Third, shackle scrap standards:

1, there is a clear permanent deformation or the shaft pin can not turn freely.

2. The cross-sectional wear of the buckle body and the shaft pin is more than 10% of the original size.

3. Any cracks appear on the shackle.

4, shackles can not be locked.

5, failed after the shackle test.

6. If there is a large area of ​​corrosion or rust on the shackle body and shaft pin, it should be scrapped immediately.

Fourth, shackle main purposes and scope of application:

The shackle can be used for rigging end fittings and is directly connected with the hanging object during the lifting operation.

Shackles can be used between the rigging and the end fittings, only for connection.

When the rig is used with a cross beam, the shackle can be used to replace the sling with the ear plate at the lower part of the cross beam to facilitate installation and disassembly.

Shackles are the most widely used connection tools for lifting operations. They are mainly used for connection points that are frequently installed and disassembled.

D-type shackles are mainly used for single limb rigging; B-type shackles are mainly used for multi-limb rigging.

The BW and DW shackles are mainly used in the occasions where the rigging does not drive the rotation of the pin; BX and DX shackles are mainly used in the occasions where the pin shaft may be rotated and where the long-term installation is required.

Fifth, the classification of commonly used shackles:

Shackle also known as: buckle, snap ring, D-shackle, bow shackle, U-type shackle, etc.

Shackles, a kind of rigging. The shackles commonly used in the domestic market are generally divided into three categories according to production standards: national standard, American standard, and Japanese standard. Among them, American Standard is most commonly used because it is widely used due to its small size and heavy weight. Shackle due to higher gravity, so the higher strength requirements; the appearance of the requirements are not high, the current better shackles are generally made of alloy steel.

Sixth, use and operation

1. The limit working load and the use scope of the shackle are the basis for the test and use of the shackle, and it is strictly prohibited to use it with overload.

2. In the process of lifting, it is forbidden to collide and impact on the items being lifted.

3, lifting process should be as stable as possible, the following is strictly prohibited station or on the object through.

4. Before any shackles are used, they must be suspended and lifted. The hanging point should be on the same vertical line as the lifting center of gravity.

5, shackle in the high temperature, low temperature environment, the limit of the working load factor,

6. The hanging object ear plate and other rigging fittings which are in contact with the shackle pin shaft shall not be less than the pin shaft diameter.

7. After the hoisting operation is completed, it is not allowed to throw the shackle down from high altitude to avoid deformation or internal damage and cracks caused by the shackle.

Seven, shackles practical instructions:

1. Shackles with no sign and inspection certificate are prohibited from being put into use.

2. Before using shackle products, be sure to check the appearance of the product for cracks and the rated load of the product. No use of overload.

3, shackle chain to be a smooth vertical lifting, angled diagonal pull, we must consider the working load will have a corresponding change, the maximum angle can not exceed 60 °.

4. Selection of specifications and types of slings used with shackles: When selecting shackle specifications, the use factor must be determined by the size, weight, shape of the hoisted load, and the hoisting method to be used. Including the consideration of calculations, given the requirements of the limit work force, the working environment and the type of load must be considered.

5, to ensure personnel safety. In the hoisting process, pay close attention to ensure the safety of personnel, and must warn personnel in dangerous conditions and immediately withdraw from dangerous areas if necessary. The hand or other part of the body must be away from the sling to prevent injury when the sling is loose.

6, the correct storage shackle. After the shackle has completed the lifting operation, it must be replaced and properly stored; if it is no longer used, it must be stored in clean, dry, well ventilated conditions, at room temperature, away from heat sources, and can erode the appearance of gases, chemicals, etc. Direct sunlight or other strong ultraviolet radiation. Priority should be given to the use of stored items. Any damage that may occur during the use of the shackle must be checked, and it is not necessary to store damaged slings. Shackles get wet during use, or for cleaning reasons, will be hung up and dried naturally.