一般情况下，挖掘机工作装置部分包括动臂、斗杆、铲斗以及相关的油缸和液压管路。因挖掘机的工作装置部分更换比较方便，所以可以根据不同的工作场合更换相应的工作装置，以满足各种工况的需要。例如整个工作装置可以选用挖机加长臂(动臂、斗杆均加长，铲斗容量减小)，这样挖掘机的挖掘范围增加了，挖机加长臂特别适合于一般河道的清淤；清淤时只需从河道两边的河滩上作业即可。工作强度大的矿山岩石挖掘需要选装加强加厚的挖机加长臂以对付恶劣的工况，保证工程的顺利完成。或洪口工作的机器有时要加装吊钩装置以方便吊装车辆。
Generally, the working device part of the excavator includes the boom, stick, bucket, and related cylinders and hydraulic lines. Because the working device of the excavator is easy to replace, the corresponding working device can be replaced according to different working conditions to meet the needs of various working conditions. For example, the whole working device can use the excavator lengthening arm (the boom and bucket rod are lengthened, and the bucket capacity is reduced), so that the excavation range of the excavator is increased, and the excavator lengthening arm is particularly suitable for the dredging of general rivers; The dredging can only be carried out from the beaches on both sides of the river. For rock excavation in mines with high working intensity, it is necessary to select and install thickened excavator lengthening arm to cope with bad working conditions and ensure the smooth completion of the project. Or the machine working at Hongkou sometimes needs to be equipped with a hook device to facilitate the lifting of vehicles.
产品应用：
Product application:
（1）基坑、陡坡挖掘的土方工程，河堤，坡面修整工程。
(1) Earthworks for excavation of foundation pit and steep slope, river embankment and slope finishing works.
（2）市政管网，埋管作业工程，修地铁、挖隧道远距离挖掘。
(2) Municipal pipe network, buried pipe work, subway construction, tunnel excavation and long-distance excavation.
（3）沟渠清淤，河道疏通，水电站尾水清淤，较深河道淤泥、碎石的清理。
(3) Dredging of ditches, dredging of river channels, dredging of tailwater of hydropower stations, and cleaning of sludge and gravel in deeper river channels.
（4）其他对深度、宽度、高度有特别要求的特殊工况。
(4) Other special working conditions with special requirements for depth, width and height.
购买须知：
Purchase instructions:

一、加长臂说明
1、 Description of extension arm
1、根据不同挖掘机型号制作长度为13-32米范围
1. The length is 13-32 meters according to different excavator models
2、加长臂使用材质为Q420、Q550、Q690等高强度材料、抗拉度强
2. The material used for the extension arm is Q420, Q550, Q690 and other high-strength materials with high tensile strength
3、制作产品重量轻、结构强、使挖机的承受负何力达到小范围
3. The product is light in weight and strong in structure, so that the bearing capacity of the excavator can reach a small range
4、开挖特殊工程作业好帮手、能完成挖机标准配置做不了的作业
4. It is a good helper for excavation of special works and can complete the work that cannot be done by the standard configuration of excavator
二、加长臂配置
2、 Extender configuration
20-25吨位挖掘机加长臂，可加长到16米，其配置为： 挖斗1个、铲斗油缸1支、销轴6支、 高压软管4条、黄油管3条、连杆总成1套、运输连杆1套、加长大臂（8.5.米）、加长小臂（7.5米）。
The extended arm of 20-25 tonnage excavator can be extended to 16 meters. Its configuration is: 1 bucket, 1 bucket oil cylinder, 6 pin shafts, 4 high-pressure hoses, 3 grease pipes, 1 connecting rod assembly, 1 transport connecting rod, extended boom (8.5 meters), and extended jib (7.5 meters).
25-34吨位挖掘机加长臂，可加长到20米，其配置为：挖斗1个、铲斗油缸1支、销轴6支、 高压软管4条、黄油管3条、连杆总成1套、运输连杆1套、加长大臂（11米）、加长小臂（9米）。
The extended arm of 25-34 tonnage excavator can be extended to 20 meters. Its configuration is: 1 bucket, 1 bucket cylinder, 6 pin shafts, 4 high-pressure hoses, 3 grease pipes, 1 connecting rod assembly, 1 transport connecting rod, 1 extended boom (11 meters), and 9 extended jib (9 meters).
35-40吨位挖掘机加长臂，可加长到22米，其配置为：挖斗1个、铲斗油缸1支、销轴6支、 高压软管4条、黄油管3条、连杆总成1套、运输连杆1套、加长大臂（12米）、加长小臂（10米）
The extended arm of 35-40 tonnage excavator can be extended to 22 meters. Its configuration is: 1 bucket, 1 bucket cylinder, 6 pin shafts, 4 high-pressure hoses, 3 grease pipes, 1 connecting rod assembly, 1 transport connecting rod, 1 extended boom (12 meters), and 1 extended jib (10 meters)
40-50吨位挖掘机加长臂，可加长到26米，其配置为：挖斗1个、铲斗油缸1支、销轴6支、 高压软管4条、黄油管3条、连杆总成1套、运输连杆1套、加长大臂（14米）、加长小臂（12米）。
The extended arm of 40-50 tonnage excavator can be extended to 26 meters. Its configuration is: 1 bucket, 1 bucket cylinder, 6 pin shafts, 4 high-pressure hoses, 3 grease pipes, 1 connecting rod assembly, 1 transport connecting rod, 1 extended boom (14 meters), and 12 extended jib (12 meters).
三、加长臂工艺
3、 Extender process
两段式加长臂一般采用Q345B通用高强度钢板制造，设计、模拟工作、排版下料、铣边成型、拼装焊接、管路清洗、质检等工艺流程。
Two-stage extension arm is generally made of Q345B universal high-strength steel plate, and the process flow of design, simulation work, typesetting and blanking, edge milling and forming, assembly and welding, pipeline cleaning, quality inspection, etc.
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