Grab bridge crane
In the raw material preparation operation, the bridge crane with grab can be used for unloading, stacking, transporting, reclaiming and loading. The grab bridge crane is widely used in the hoisting of ordinary goods in factories and mines. The special spreader grab is used for special operation.
The basic conditions to ensure that the grab is full of materials are as follows: appropriate bucket type, basic size and sufficient self weight. According to the characteristics of the material being grasped, the grab is usually divided into four basic types: light type, medium type, heavy type and extra heavy type. See Table 1 for the adaptability of various types of grab and the ratio of self weight to material weight. The weight of medium-sized grab is about equal to the weight of material. The weight of light-weight grab is smaller than that of heavy-duty grab.
For different types of grab, the corresponding parameters and structural types should be selected. The double jaw grab is suitable for grasping granular materials and powder materials. When the grain size is larger than 100 mm or more solid materials, the jaw plate should be made with teeth; when the grab is used to unload standard rail vehicles, the grab volume is generally not more than 3 m. Multi claw (also known as lotus) grab, the number of jaw plates in the bucket is generally 6, and the jaw plate cut is sharp angle, which is suitable for grasping the materials that are difficult to insert in the double jaw plate grab, such as large hard ores, aluminum ingots, iron chips and scrap steel.
Structure and working principle
The grab bridge crane is mainly composed of box bridge, grab trolley, crane running mechanism, cab and electrical control system. The picking device is a grab which can grab bulk materials. The grab bridge crane has opening and closing mechanism and lifting mechanism. The grab is suspended on the opening and closing mechanism and lifting mechanism by four wire ropes. The opening and closing mechanism drives the grab to close and grab materials. When the bucket opening is closed, the lifting mechanism is started immediately to make the four steel wire ropes load evenly for lifting. When discharging, only the opening and closing mechanism is opened, and the bucket mouth is opened to tilt the material. The structure of grab bridge crane is basically the same as that of hook bridge crane except that the lifting mechanism is different.
In order to ensure the safety of the crane, the railings are set up with a height of 1050 mm and a spacing of 350 mm. Two horizontal bars are set up. The enclosure board with a height of 70 mm is set at the bottom. The lighting lamp is set under the bridge. The insulating rubber and door switch are set in the driver's cab. The protective cover is set for each transmission part. The safety switch is set for each rail door. The stop is set at the end of the travel and the sliding line is equipped with a catch hook Frame.
Luzhou Libang Metal Structure Co., Ltd. is specialized in the production and processing of excavators' positive dippers Backhoe of excavator 、 Plum blossom grab of steel grabbing machine And various metal structure products processing.
Luzhou Libang Metal Structure Co., Ltd
Mobile phone: 13550890427 Manager
Address: Section 2, Xinyang Road, high tech Zone, Luzhou City, Sichuan Province