Types of the hottest lifting belts and precautions

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Types of lifting belts and precautions for use

I. product introduction of lifting belts

conventional lifting belts (synthetic fiber lifting belts) are generally made of high-strength polyester filaments, which have multiple advantages such as high strength, wear resistance, oxidation resistance, UV resistance, etc. at the same time, they are soft, non-conductive, non corrosive (no harm to human body), and are widely used in various fields. There are many kinds of lifting belts. Conventional lifting belts (according to the appearance of lifting belts) are divided into four categories: annular core piercing, annular flat, double eye core piercing, double eye flat

II. How to select and use lifting belts

1. Selection of lifting belt specifications and types. When selecting the specifications of lifting belts, the size, weight, shape of the lifted load and the use mode coefficient jointly affected by the lifting method to be adopted must be included in the calculation and considered, and the requirements of the limit working force given must be considered. At the same time, the working environment and the type of load must be considered. Slings and riggings of appropriate length with sufficient capacity and meeting the use mode must be selected. If multiple lifting belts are used for lifting loads at the same time, the same type of lifting belt must be selected; The raw materials of the flat sling shall not be affected by the environment or load. Whether accessories or soft lifting lugs are required or not, the end of the lifting belt must be carefully considered to match the auxiliary accessories and lifting equipment

2. Restricted use angle of slings when using a flat sling with soft lifting lugs, the minimum length of the lifting lug used shall not be less than 3.5 times the maximum thickness of the hook in contact with the lifting lug, and the included angle of the lifting lug movement shall not exceed 20. When connecting slings and lifting appliances with soft lifting lugs, the contact part of slings and lifting appliances must be continuous, unless the axial width of slings does not exceed 75mm, and the bending radius of lifting accessories must be at least 0.75 times the axial width of slings

3. Follow good hoisting experience and plan the hoisting and portable operation scheme before hoisting

4. The size of hoisting shall be as close to 25mm as possible × At 25mm, the lifting belt connection method should be used correctly. The lifting belt should be correctly placed and connected to the load in a safe way. The lifting belt must be placed on the load so that the load can balance the width of the sling; Never knot or twist the sling. The stitched part cannot be placed on the hook or lifting equipment, and always placed on the upright part of the sling to prevent damage to the label by being away from the load, hook and locking angle

III. lifting belt standard

materials: polyester, polypropylene, nylon, DuPont, nylon, synthetic fiber

type: single layer, double layer, four layers

manufacturing materials: 100% polyester

strength: flat lifting belt 1t-30t round lifting belt 1t-300t

bandwidth: 25mm-150mm

elastic depth: 2%-3% under 10% of the rated load ultimate working force

load identification: during use, After the label on the sling is worn, the bearing quality can be identified by the color of the outer sleeve of the sling

working temperature: - Celsius

safety factor: 5:1 6:1 7:1 new industry standard jb/t8521 Production of lifting belts, the product safety factor is 6

IV. maintenance methods

1. Moving lifting belts and goods 1 Inspection standard: do not drag when air spring performance test standards qc/t 207 (1) 996 and jb/t 8064.1 (9) 6 are used. Don't knot it

2. The soft ring should not be connected with any device that may cause damage and wear to it

3. Do not screw it when carrying

4. Slings without sheath should not be used to carry goods with sharp corners and edges

5. The opening angle of the soft ring should be avoided to exceed 20

6. The sling should be stored away from light and ultraviolet radiation

7. Do not store the sling near an open fire or other heat sources

8. When the lifting belt is not used, the lifting belt should be placed in a place with good light

v. classification of lifting belts

1. Flat lifting belts

industrial strong silk warp knitted and dyed into industrial webbing, with width of 15 mm, 30 mm, 50 mm, 60 mm, 75 mm, 90 mm, 100 mm, 120 mm, 150 mm, 180 mm, 240 mm, 300 mm, and lifting lug width of 30 mm, 50 mm, 60 mm, 70 mm, 80 mm, 100 mm. Industrial webbing is sewed into a flat sling. There is a lifting ring on both sides of the flat eyelet lifting belt, and the anti-wear sheath is sewn on the lifting ring. Several layers of webbing are sewn together in the middle of the flat eyelet sling. The flat ring sling is just a ring

2. Synthetic fiber sling

is a soft sling with excellent performance. It is made of high-quality high-strength low elongation polyester filament and is a replacement product of steel wire. It has been widely used for more than 50 years by testers of the anti slip coefficient of high-strength bolted joints in the internationally industrialized countries. Its superior performance is favored by the majority of users. Its main features are: light and soft: the weight is 25% of the same metal sling, and the sling is very easy to operate, handle and store. It will not damage the surface layer of the lifting parts (including the paint layer), and will not cause any negative harm to the human body. Safe and reliable: it has the characteristics of shock absorption, corrosion resistance, aging resistance, non-conductive, and no spark in flammable and explosive environment. The elongation under rated load is 1.6%, and the tensile property is close to that of steel wire rope. The use condition of the sling is clear at a glance, and the daily safety inspection is intuitive and simple. It can be considered that the sling that looks intact is intact. Synthetic fiber sling is soft and easy to operate. Corrosion resistant, non-conductive

III. the round sling

consists of a closed bearing core surrounded by endless bundles of equally arranged wires, which is twisted with a single strand of wire. The number of wires in a row reaches more than 100000 cycles, playing a bearing role. All round lifting belts are round without annular eyes

the outer layer of the round sling is a special double-layer wear-resistant sleeve, which is butt jointed into a ring shape. The outer sleeve does not bear load, but only protects the parallel arranged tow. In case of local damage to the bearing core caused by serious overload or long-term use, the jacket will be broken first, which can avoid accidents. If there is a large cut on the sleeve of the round sling, it must be checked whether it can be repaired or continued to be used. In any case, if the user cannot determine the extent of damage, it is best to return the round sling to the manufacturer for further inspection

IV. TA sling

is a woven wear-resistant jacket, which is made of a ring sling (also known as universal sling) with a high-strength rope core. It is one of the most widely used soft slings. The annular mechanism can make the sling body wear circularly, and the service life of the sling is longer

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