Turnover device and method for cylinder head of marine diesel engine

Abstract

A turn-over device and method for a cylinder head of a marine diesel engine. The turn-over device and a single hook are used to work together. During the lifting process of the cylinder head, the lifting point of the single hook is staggered from the center of gravity of the cylinder head to form a rollover torque. Using the characteristic that the rotating assembly can swing on the ground, the cylinder head can turn sideways and turn over with the help of the rotating assembly; the turning device includes a rotating assembly and a skid, and the rotating assembly has a curved bottom, including three ribs, a bottom plate , two vertical stands, two support rollers, installation shafts, support base plates and support baffles; the bottom profile of the three ribs is curved, vertically and parallel to the horizontal setting, the shape of the bottom plate is the same as the bottom profile of the ribs and is welded firmly with it, The two vertical frames are attached to the outer sides of the ribs on both sides respectively, and the lower part is fixed to the ribs. The supporting rollers are mounted on the upper parts of the two vertical frames through the mounting shafts and can rotate. The rotating components are placed and can swing left and right on the ground. The invention is easy to operate, has high working efficiency, greatly improves the safety of operation, and avoids the risk of accidents.

Description

technical field [0001] The invention relates to a lifting device and a method, in particular to a turning device and a method for a cylinder head of a marine diesel engine, belonging to the technical field of lifting. Background technique [0002] The cylinder head of a marine diesel engine is a large part, which is usually a stepped cylindrical structure, please refer to figure 1 , the maximum diameter of the small outer circle 181 at the small end is 1200mm, the maximum diameter of the large outer circle 182 at the large end is 1700mm, the upper end surface is the top surface 183 of the cylinder head 18, the maximum height of the whole part reaches 920mm, and the maximum weight is 7 tons. Such a huge cylinder head 18 also needs to be turned frequently in order to carry out the processing of each process during the production process, which is obviously a thorny problem. [0003] Because the method of turning over in the air with a single hook has a large inertial impact f...

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Problems solved by technology

[0003] Because the method of turning over in the air with a single hook has a large inertial impact force, it will have an adverse effect on driving, and it is easy to cause damage to the slings, which has certain potential safety hazards. Therefore, most of the prior art uses bridge cranes. Double-hook combined aerial turning method, that is, one hook is used to bear the weight of the cylinder head, and the other hook plays a role in straightening the cylinder head. When the cylinder head turns over to a certain position, the functions of the two hooks are interchanged.

[0004] Using the existing traditional way of turning over in the air, it is necessary to connect the two ends of the cylinder head with wire ropes. When turning over in the air, due to the transfer of the center of gravity of the cylinder head, the hoisting control is extremely difficult, and it is easy to cause the lifting point to move, resulting in equipment damage. There is a high risk of accidents and personal injury

In addition, the distance between the two main hooks of the crane designed with double trolleys is relatively large after being combined, which is much greater than the distance between the two lifting points on the cylinder head when turning over. Therefore, the wire rope will deviate greatly when turning over, and there is a risk of wire rope slipping , so the existing double hooks of the bridge crane combined with the way of turning over in the air cannot meet the requirements of safe hoisting; in addition, the existing traditional way of turning over in the air is also limited by the lifting equipment. Unable to complete the turning operation of the cylinder head

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