What should be paid attention to when using the crane anti rotation wire rope

Crane is a general term for lifting machinery, which has been widely used in ports, workshops, electric power, construction sites and other places, and wire ropes should be used and maintained correctly

1. Ensure the safe operation of the wire rope, and do not overload it in use; It is not allowed to make the wire rope bend at an acute angle. The elasticity of the wire rope is smaller than that of the fiber rope, and if the force is too strong and too large in use, it is easy to break suddenly. Therefore, in use, the wire rope should be slowly stressed, and it is not allowed to change the lifting speed sharply, and the overdriving and braking must be slow.

2 After the wire rope is used, the rust and dirt should be brushed with a wire brush, and greased, then coiled, stored in a dry place, and regularly inspected, lubricated. Wire ropes stacked in the open air must be covered with canvas covers.

3. The edge yarn of the pulley of the wire rope may be cracked, and if the sharp angle of the wire rope and the equipment components and the building is directly connected, the wooden block should be padded to avoid damage to the wire rope.

4 wire rope through the pulley, the width of the pulley groove should be larger than the diameter of the rope 1, the pulley groove is too large, the wire rope is easy to flatten, the group is easy to wear, the diameter of the pulley, in the manual equipment shall not be less than 16 times the diameter of the wire rope, in the motorized equipment, shall not be less than 20 times, in order to reduce the bending stress of the rope.

5. The wire rope shall not be kinked or bent, otherwise the wire rope will be deformed, the rope core will be exposed, and there will be a gap between the steel wires, which will easily absorb moisture and rust and corrode, and the force of each strand of steel wire is uneven, the strength is reduced, and even some steel wires are broken, and it is easy to stab the hand in the work.

The main types of wire ropes in the domestic market:

1.Phosphate coated wire rope (Chinese patent), the steel wire is phosphated by manganese or zinc-manganese, the surface of the steel wire is very wear-resistant, effectively inhibiting the occurrence of fretting wear, is the upgraded product of the smooth wire rope, the service life in the atmospheric environment far exceeds the smooth wire rope of the same structure, including the imported smooth wire rope (the current fatigue life of the phosphate rope is about three times that of the smooth rope, and in the future, with the in-depth research on the wear-resistant phosphate liquid, it may be greatly improved, and the fatigue life can be compared through the fatigue test. Phosphate film 3-60 grams m2, the steel wire is not drawn after phosphating, and the wire rope is directly twisted, note - can not be confused with the phosphating of the rope wire with the drawing of the rope phosphating), foreign countries have been in the cottage China's phosphate coating wire rope innovation technology.

2.Galvanized steel wire rope, including hot-dip galvanizing and electro-galvanizing, straight-up hot-dip galvanized steel wire has a thicker zinc layer, the thicker the zinc layer, the stronger the corrosion resistance, the longer the use time, and the electro-galvanized is thinner. Due to the certain anti-corrosion performance of the phosphate coating, the manganese phosphate coating wire rope can be used instead of some varieties of galvanized steel wire rope with thin zinc layer, such as the B-grade galvanized layer in GB8918-2006 important purpose steel wire rope.

3.Stainless steel wire rope, the use of stainless steel wire twisted wire rope, such as 304 or 316 stainless steel, ** relatively expensive, the stainless steel wire with manganese phosphating coating treatment (stainless steel wire phosphating requires a special phosphating formula), can also greatly extend the service life.

4.Plastic-coated wire rope, on the basis of high-quality carbon wire rope, the outer layer of the wire rope or strand rope is coated with polyethylene or polypropylene.

5.Smooth wire rope, the British began production in 1834, Tianjin No. 1 Wire Rope Factory began to produce and use in China in 1939, with the phosphate coated wire rope entering the market in large quantities, will be phosphated coated wire rope completely eliminated.

The correct name should be - resistance to rotation of wire rope, that is, multi-strand wire rope, wire rope adjacent to the strand rope with different twist directions, so as to achieve the purpose of resistance to rotation. The following points need to be noted, can not be pulled horizontally, the wire rope can not be wound flat on the drum, in some cases the wire rope will undergo a certain plastic deformation, resulting in the separation of the inner and outer layers of the wire rope into a lantern-shaped, and soon damaged and broken. It cannot be overloaded, oiled for maintenance, and the rope arranger should be checked frequently, etc., for reference only.

Summary. 5. Pass the end of the electric basket wire rope from the safety air hole from top to bottom, guide it into the safety rope positioning sleeve hole on the same side of the shell through the bracket hole, and prepare to connect with the falling lump.

Briefly describe how to properly fasten the safety rope and seat belt when using the lift spider crane:

The safety rope should meet the requirements of national standards, and there should be no loose broken strands and knots, and the safety lock parts should be intact.

Specifications and orientation markings should be clearly legible.

1. Use the electric gondola safety rope and the load-bearing two ropes to fish in parallel, and then push the impeller arm of the safety device forward to the vertical position.

2. The top end of the safety rope is tightened with three buckles in turn, and the chicken heart ring is set, and then it is put on the nail at the front end of the lifting beam.

3. Fix the safety rope 200 mm from the ground with the same method on the falling stone.

4. Pass the end of the working rope through the drop core with an external threaded hole on the plane of the fall stone, tighten it, and fasten it with a fastening nut about 400 mm from the ground.

5. Pass the end of the wire rope from the safety air hole from top to bottom, and guide the safety rope positioning sleeve hole on the same side of the shell through the bracket hole, and prepare to connect with the falling lump.

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Summary. Hello <>

If the lifting wire rope is intact and unbroken, then it can continue to be used. However, in actual use, the use of wire ropes under the following circumstances should be strictly prohibited:1

Serious wire breakage: If the wire rope is broken and serious, it should be replaced as soon as possible, otherwise it will generally affect the safety of lifting. 2.

Inferior wire rope: If the wire rope used is of poor quality and the quality cannot be guaranteed, then it should also be replaced as soon as possible. 3.

It has been used for too long: If the wire rope has been used for too long, it will generally have problems such as fatigue, aging, and rust, and should also be replaced in time.

The hoisting wire rope is intact without broken wires, and it is strictly forbidden to use what kind of wire rope.

The hoisting wire rope is intact without broken wires, and it is strictly forbidden to use what kind of wire rope.

Hello <>

If the lifting wire rope is intact and unbroken, then it can continue to be used. However, in actual use, the use of wire ropes under the following circumstances should be strictly prohibited:1

Serious wire breakage: If there is a broken wire rope and it is serious, it should be replaced as soon as possible, otherwise it will generally affect the safety of lifting. 2.

Inferior wire rope: If the wire rope used is of poor quality and the quality is not guaranteed, then it should also be replaced as soon as possible. 3.

It has been used for too long: If the wire rope is used for too long, it will generally cause fatigue, aging, rust and other problems, and it should also be replaced in time.

For the qualification requirements of lifting wire rope, it is necessary to ensure reliable quality, long service life, good adaptability and economy, that is, suitable wire rope needs to be used for lifting work. At the same time, the mechanism and other devices need to be overhauled to check for corrosion, broken wires or other damage. The wire rope should be checked and maintained frequently in use.

Inspections should be carried out daily or weekly, especially if the weight exceeds its carrying capacity. After inspection, if the silver is broken or otherwise damaged, it should be replaced in time. The wire rope should avoid excessive bending, heavy load, excessive stretching, etc., so as not to affect its safety.

In addition, when using wire ropes, attention should be paid to Anfeng's full range of measures to ensure that the operator is not harmed. <>

1. There is oil, 2 is over-circuit protection, 3 is long with braided joints, 4.

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What are the disadvantages of jacks: 1. Long stroke, 2. Short stroke, 3. High machining accuracy, 4. Impact.

Kiss, choose the third.

Summary. We're happy to answer for you! Single-rope winding lifting device, designed for lifting materials, the minimum safety factor of the wire rope is; When the lifting device is designed for lifting and lowering materials, the minimum safety factor of the wire rope is; When the inclined infinite rope winch is designed for lifting and lowering materials, the minimum safety factor of the wire rope is 5 but shall not be less than; The minimum value of the safety factor of the wire rope used in the tensioning device is 5.

Wherein: h is the suspension length of the wire rope, m; l is the length from the driving wheel to the tail rope pulley, and when the wire rope is hoisted in what way, the safety tie time is 70%.

We're happy to answer for you! Single-rope winding key type lifting device, specially designed for lifting materials, the minimum safety factor of the wire rope is; When the lifting device is designed for lifting and lowering materials, the minimum value of the safety of the wire rope is; When the inclined infinite rope winch is designed for Zheng Nian to lift and lower materials, the minimum safety factor of the wire rope is 5 but shall not be less; The minimum value of the safety factor of the wire rope used in the tensioning device is 5. Where:

h is the suspension length of the wire rope, m; l is the length from the driving wheel to the tail rope pulley, and the rope safety factor of the wire rope refers to the ratio of the sum of the breaking force of all steel wires in the wire rope to the maximum static load of the steel rope. In order to ensure the safe and reliable operation of the wire rope, the safety factor of the new wire rope used in the single-rope winding mine shaft hoisting equipment is generally stipulated to be not less than 9 when the special lifting personnel are hired; When lifting personnel and inspecting materials, it cannot be less than; When specifically lifting materials, it cannot be less than. The safety factor of the hoisting wire rope shall comply with the following provisions:

1) for fixing lifting equipment for; (2) for manual lifting; (3) for motorized lifting is 5-6; (4) Huai excitation is used for lashing lifting objects for 10; (5) 14 for lifting and lifting

All wire ropes used for hoisting should not be less than 300 mm.

Regulations on the use of wire rope for hoisting:

1. When using wire rope to lift materials, it is necessary to comply with the principle of "ten non-hoisting" for lifting, "Safe Operation Standards for Lifting Workers" and "Safe Operation Standards for Cables".

2. The selection of the wire rope must match the weight of the hanging object, that is to say, the weight of the hanging object shall not exceed the load capacity of the wire rope.

3. Before using the wire rope, it must be carefully checked, and the wire rope shall not be used if the rope strand is broken or the number of broken wires exceeds 6 twists; Wire ropes with obvious wear, corrosion, deformation and damage due to heat or arc are also not allowed to be used.

4. When the wire rope is used, it is necessary to prevent knotting, twisting and squeezing the holes. The wire rope shall not be in direct contact with the edges and corners of the object, and padding should be added to the edges and corners.

5. When braiding and eliminating the wire rope buckle of rock weaving, the length of the braiding should be greater than 15 times the diameter of the wire rope, and it should not be less than 300mm.

6. The two wire rope buckles shall not be directly connected with each other, and D-type shackles must be added in accordance with the load specifications.

7. When the end of the wire rope is fixed and connected with a rope card, the rope clamp pressure plate should be on the side of the wire rope that is mainly stressed, the rope clamp spacing should not be less than 6 times the diameter of the wire rope, the number of wire rope cards below 18mm is not less than 3, and the number of rope cards should be increased by 50 when the two wire ropes are lapped with rope cards.

8. When cutting the wire rope, measures should be taken to prevent the rope strands from spreading, and the wire rope should not be cut by gas cutting and electric welding.

9. The wire rope must be hung on the wire rope bracket after use. The wire rope is strictly forbidden to come into contact with any electrified body, red-hot objects or flames.

That's all I have, hope. Thank you!

Summary. The wire rope and chain drop and other equipment used in crane lifting must meet the safety requirements, and it is strictly forbidden to prohibit what or what to lift.

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Tower crane pulleys and reels should be equipped with wire rope anti-disconnection devices for the first seepage annihilation. （）

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The safety factor of hanging and tying up the wire rope should not be less than ().

Correct answer)

The actual breaking strength of the cable buckle of the wire rope sling should be smaller than the minimum breaking tension of the corresponding wire rope, at least 70% of it; For some single-rope wire rope slings, the minimum distance of the inserted part of the cable buckle at each end must be larger than the nominal diameter of the wire rope, and be greater than 10 times or more of it; The length of the rope sleeve used to press the wire rope sling without the collar (i.e., the distance from the joint to the inside of the rope sleeve) is greater than the nominal diameter of the wire rope and should be 15 times or more than it. Appearance requirements for wire rope slings. For the rope core of the inserted part of the wire rope sling, it must not be exposed, and the rope strands must be tightly connected to each other, so as not to produce signs of looseness;