Q:Does the crane hook group include the secondary hook and the main hook

Hook group is collectively referred to as the main hook and the hook are hook group. Two refers to the crane hoisting mechanism

Q:Lift hook beam, 2.1m span hook in the beam, load-bearing 2T, please ask the size of the hook beam and reinforcement?

The lift hook of the lift well roof is used for installation and maintenance of all parts of the elevator. It is free during the normal operation of the elevator. It is not necessary to consider the deflection under long-term load.

Q:What is the standard of lifting hook?

The core shaft should be scrapped when the core of the hook is worn up to 5% of the original size

Q:Loading hook for elevator room

The use is to use the shaft as a fulcrum when lifting the equipment from the hoistway to the engine room

Q:What is the wear standard of crane hook?

Hook wear: self repair is prohibited to re-use. Where all wear and tear will be scrapped.

Q:What are the dangerous sections of the crane hook

by the A-A sling tension section on the one hand, the hook has straightened trend; also by the effect of bending moment on the other hand. Because the moment in this section, the bending stress is maximum, this section is a dangerous section.

Q:What safety device should be installed on the hoisting hook of crane

1. hook safety device. Mainly to prevent the crane when the work, the weight drop is hampered by the hook continued to decline caused by the rigging off hook accident. The utility model is characterized in that a spring cover is arranged at the opening of the hook, and the cover can not be opened upwards and can only be pressed downwards to prevent the sling from being discharged from the opening.2. reel safety device. The main reason is that when the transmission mechanism fails, the wire rope can not be arranged on the spool so that it can cross the end flange of the reel and cause the rope to bite.3 ladder retainer(1) when the ladder of the channel height is greater than 5m, set up from the platform above 2m retainer. Retainer should remain intact, does not appear too large deformation and small circle, open welding phenomenon.(2) when climbing the ladder is arranged on the internal structure, such as climbing the ladder and the spacing structure is less than 1.2m, can not be provided with a retainer.

Q:Why does the crane have two hooks?

Floating crane is generally divided into fast and slow hook, hook. But the use of large tonnage crane hook is very small. Mainly on the use of small crane.Fast hook is generally single strand wire rope, lifting speed, high efficiency.Slow hook will be based on the weight of the lifting of the article, a lot of time need to return to the rope, so as to be able to lift the goods. Have seen the largest is the rate of 7-8, mainly to enhance the heavier goods

Q:Hook crack Hook crack what method of crack detection?what method of crack detection?

Detection of cracks in general with surface detection (magnetic particle or permeability), high sensitivity. In view of the hook surface oil is more, the effect of penetration test is not good, and the hook is generally ferromagnetic material, so the effect of magnetic particle inspection is good.

Q:Embedded problem of hook of civil air defense door

Air door hook pre buried air raid garage can use two round steel inserted under the roof, then after stripping, the bending steel welded together, this approach can not. Must first be processed into U shape, and then once buried in place.