Introduction to sling ring sling manufacturer risk control measures
When the wire strands of the ring sling cables after rack and put in place, should immediately with sling wire section extrusion into circular taut wire machine.
A long-span suspension bridge generally need to match 4 taut wire machine, so that to 1 cable mainspan and cross taut wire symmetry position.
Taut wire generally south across to the main tower and tight 1 per meter circle, tight and knocked with wooden stakes.
And then press with baling press gap strapping steelskin take 2 ~ 3, in order to avoid the wire loosen.
In the cable length on firm after compaction, marked the rope clamp can be position}
On the wire.
Installation of cable clip before cat way panel can be suspended on the wire, cable clip tight hoop on the wire with high strength bolt, by sling clamp and the friction force between the steel cable, so the high strength bolts should twist, repeatedly in stages to twist commonly 3 ~ 4 times.
Sling clamp after ok, sling can be installed.
Pay attention to the sling for protection.
Subsection hoisting must pay attention to the symmetrical balance load and keep the beam section of docking, as for concrete box girder, the docking process is more complicated, dehumidification, joint construction and wearing beam, zhang tuan, grouting and sealing process, this a few word sequence can affect precision linear stiffening girder and cables.
In addition, also note stiffening beam connection with derrick structure, the structure of the bearings and wind bearings and the installation of expansion, etc.
During the construction of the stiffening girder, the stiffening girder with the order of connection structure of derrick lifting and methods are designed to do, it is important to pay special attention to the wind resistance measures in the process of hoisting.
Due to the hoisting wire rope under load is in the process of gradually increase, so must be after each load measured the change of the wire line and, as compared with the designed linear if discrepancy is larger, should consider to adjust the sling order.
Crane or hanging objects between the main body and suspended objects fittings also covers the sling and spreader.
When choosing a sling specifications, must take the lifting load of size, weight, shape, and prepare lifting methods such as the use of common influence coefficient into consideration, given the limits of the requirements of the work force, the work environment at the same time, the kinds of load must be considered.
Must choose to have enough ability, and can satisfy the use of appropriate length of the sling, if more than one sling is used at the same time lifting load, must choose the same type of sling;
The raw material of flat sling cannot be affected by the environment or load.
Whether attachment or soft lug need, must be considered the end of the sling and auxiliary accessories and lifting equipment matching.
Metal sling sling mainly include: metal wire rope sling, sling chain, lifting belt hanging cable, shackle, hook, hanging (
Clamp, magnetic spreader, etc.
Synthetic fiber sling synthetic fiber sling basically has: with polyamide, polypropylene, polyester, with high strength and high modulus polyethylene fiber as material to produce the rope and belt sling.
In mechanical and electrical engineering lifting sling mainly includes: a, pulley block and wire rope hoist and balance beam.
Method of use do not overload use.
No mark at the end of the sling confirmed, shall not be used.
Sling combination components on top of the regular inspection according to the requirements of parts.
May not adopt the method of hammer to correct the distortion of the sling.
Ban casting sling.
Don't pull from beneath the weight or that the weight on the sling rolling.
Outside the purchase of the sling according to provisions of national standards must be professional manufacturer production, inspection, certification and maintenance, maintenance manual product.
In a conspicuous location on the product must be not easy to wear and tear of the rated lifting weight, production number, manufacturing date, manufacturing factory name, etc.
Use the unit should be used according to the directions and environmental characteristics of the system of rules of safe use and maintenance.