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Transformation method for box girder of oil cylinder base of large arm of door type steel grabbing machine

A technology of box girder and oil cylinder, which is applied in the field of heavy-duty engineering lifting equipment of portal steel grabber, can solve the problems of structural fatigue of key parts of the car body, increase of equipment downtime, production guarantee operation and safety impact, and achieve equipment safety and stability The effect of running, saving spare parts costs, and solving hidden dangers of equipment

Active Publication Date: 2018-09-28
SHANXI TAIGANG STAINLESS STEEL CO LTD
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Problems solved by technology

[0002] Shanxi Taigang Stainless Steel Co., Ltd. has 2 imported door-type steel grabbing machines, which are mainly responsible for the supply of smelting raw materials for steel mills. They belong to the company's key control A-level equipment. Due to continuous use for a long time, the structural fatigue of key parts of the car body is caused, which mainly reflects The base box of the boom oil cylinder cracks frequently. After adopting various methods and several treatments, the time of each use is getting shorter and shorter, and the treatment cannot be done thoroughly. It has a great impact, and imported spare parts need to be customized, the cycle is one year, and the amount is as high as 2 million. Considering all aspects, it is imminent to explore the overall box girder transformation method

Method used

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  • Transformation method for box girder of oil cylinder base of large arm of door type steel grabbing machine

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Embodiment Construction

[0013] like figure 1 As shown, Shanxi Taigang Stainless Steel Co., Ltd. has 2 imported door-type steel grabbers in the scrap yard of the processing plant. Through this transformation method, the problem of frequent cracking of the boom cylinder base box is effectively solved, and the domestic structure and the imported structure are realized. Perfect replacement, the specific implementation is as follows:

[0014] Lay double layers of asbestos cloth on the lower part of the box girder for protection. Before dismantling the box girder, measure and record the distance between the two tripods, and then support the tripods to make two seamless seamless Steel pipe support; the support rods are welded in place and fixed side by side on the inside of the tripod.

[0015] Cut the cracks on the upper plate, lower plate, front plate and rear plate of the box girder. The boom oil cylinder seat beam is fixed at both ends. The maximum bending moment is located at the midpoint and two ends...

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Abstract

The invention relates to heavy engineering hoisting equipment door type steel grabbing machine. A transformation method for a box girder of an oil cylinder base of a large arm of a door type steel grabbing machine comprises the following steps: firstly, measuring the space between two triangular racks and recording the space; then supporting the two triangular racks with two seamless steel tubes;cutting an upper plate, a lower plate, a front plate and a back plate of the box girder; selecting cutting points in positions left and right about 100 cm from 1 / 4 of the two ends; measuring the spacebetween the two triangular racks and recording the space again; pairing the upper plate, the lower plate, the front plate and the back plate at the left and right ends of a spot welding box girder part; and arranging a tarpaulin fence for the two triangular racks to be preheated, and welding, insulating and cooling the two triangular racks. According to the transformation method provided by the invention, equipment hidden danger is solved effectively, and safe and stable operation of equipment is achieved.

Description

technical field [0001] The invention relates to heavy-duty engineering hoisting equipment of a door-type steel grabber. Background technique [0002] Shanxi Taigang Stainless Steel Co., Ltd. has 2 imported door-type steel grabbing machines, which are mainly responsible for the supply of smelting raw materials for steel mills. They belong to the company's key control A-level equipment. Due to continuous use for a long time, the structural fatigue of key parts of the car body is caused, which mainly reflects The base box of the boom oil cylinder cracks frequently. After adopting various methods and several treatments, the time of each use is getting shorter and shorter, and the treatment cannot be done thoroughly. It has a great impact, and the imported spare parts need to be customized. The cycle is one year, and the amount is as high as 2 million. Considering all aspects, the exploration of the overall box girder transformation method is imminent. Contents of the invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00B66C13/00
Inventor 周军伟李晋田雅辉马文龙古宏渊
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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