Overturning device and method for marine diesel engine air cylinder cover

Abstract

The invention discloses an overturning device and method for a marine diesel engine air cylinder cover. The overturning device is cooperated with a single lifting hook to operate; in an air cylinder cover downward-lifting process, the lifting point of the single lifting hook deviates from the center of gravity of the air cylinder cover to form lateral overturning torque; and then, by use of a characteristic that a rotation component can swing on the ground, the air cylinder cover realizes lateral turning and overturning in virtue of the rotation of the rotation component. The overturning device comprises the rotation component and skids, wherein the rotation component is provided with a bottom part of a curved surface shape and comprises three ribbed plates, a bottom plate, two vertical frames, two supporting idler wheels, an installation shaft, a supporting bottom plate and a supporting baffle plate, wherein the bottom outline of each ribbed plate is of a curve shape, and the three ribbed plates are vertical and are laterally arranged in parallel; the shape of the bottom plate and the bottom outline of each ribbed plate are the same, and the bottom plate and the ribbed plates arewelded and fixed; the two vertical frames are independently laminated to the outer sides of the ribbed plates on two sides, and the lower parts of the two vertical frames are fixed with the ribbed plates; the supporting idler wheels are erected on the upper parts of the two vertical frames through the installation shaft and can rotate; and the rotation component is placed and can swing between left and right on the ground. The overturning device is easy in operation and is high in working efficiency, operation safety is greatly improved, and accident risks are avoided.

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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