链斗式挖沙船最明显的特点就是它的斗链。链斗式挖沙船的斗链是由沙斗和链节组成的，它缠绕在挖沙船斗桥的上下导轮之间。它对土质的适应能力强，能挖掘除岩石以外的各种土壤，对挖掘爆破后的碎岩石也较其他种挖泥船有效。挖后水底比较平整，适用于海港和河港码头泊位、滩地、水工建筑物基槽等规格要求较严的工程。
链斗式挖沙船就是靠斗链完成切沙、装沙过程的。船斗桥的上下导轮上下驱动使沙斗中的沙子自动卸在挖沙船的传输带上，然后将沙子送到运输船上或者直接卸在岸上。这样链斗式挖沙船就完成挖沙工作了挖沙船是流动作业的沙石采掘工具，在内陆河道中挖沙船每天的采沙量能够达到几十吨甚至几千吨。链斗式挖沙船有很多优点，我们在使用中更应提高它的工作效率，下面为大家说一下影响链斗式挖沙船工作效率的因素主要有哪几个方面：
首先，河道的启齿宽度、水深及变化规律；河岸高度及边坡长度；河床及沉积物性质与泥土硬度；岸边树木及建筑物分布；河上桥闸高度、尺寸及通过性的要求；四周有无排泥场，对泥浆浓度的要求及泥浆处理方式；岸边通路，机械功课方式、场地及对挖沙船出入现场的要求；电力、能源及后勤维修等前提的保证；河道繁忙程度，是否答应断行功课；施工季节及天气等等。
因此要对挖沙船进行保养。开机前先对整个挖沙船的传动系统及机器油料进行检查，然后开动后边拉输送带的柴油机，拉开离合器，发动柴油机，慢慢动松离合器，将转速调至正常。再发动前拉链斗的柴油机，两柴油机起动后。将转速调至需要速度。然后松开大臂刹车。慢慢将其放下，等料斗内沙子多于2/3时，可停止下放，待至1/3时再资助下大臂。
当大臂与水面成45度角时，应停放大臂。这时料斗内沙子的多少改用牵引控制。挖沙船前进时要查看斗内沙子的多少而定，前进后退要灵活，如遇沙层塌方机械工作吃力或拉不动时要牵引绳松开，使船向后退，直至挖动为止。如水下遇有大石头或泥层，船体会有剧烈的振动现象，这时应立即提起挖沙大臂，避过障碍物再进行。
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The most obvious feature of chain bucket dredging is its bucket chain. Chain bucket digging sand bucket chain is composed of Sha Dou and chain sections, it is wrapped around the bottom of the dredging boat bridge. It has strong adaptability to the soil, can excavate all kinds of soils besides rocks, and the crushed rocks after excavation blasting are more effective than other kinds of dredger. After digging underwater relatively flat, applicable to harbor and river Port Wharf berth, beach, hydraulic structure base groove and other specifications requirements stricter engineering.
Bucket-type dredging boat is to complete the Cesa and loading the sand process by bucket chain. The upper and lower roller drive of the bucket Bridge makes the sand in the bucket automatically unloaded on the transfer belt of the dredging vessel, and then sends the sand to the transport ship or directly on the shore. Such chain bucket dig sand to complete dredging work is a flow of gravel excavation sand drilling tools, dredging sand in the inland rivers every day can reach dozens of tons or even thousands of tons. Chain bucket dredging has many advantages, we should improve its efficiency in use, below for everyone to say that the impact of the chain bucket dredging work efficiency factors are mainly in the areas:
Firstly, the reluctant width, depth and regularity of the river channel, the height of the river bank and the length of the slope; the nature of riverbed and sediment and the hardness of soil, the distribution of trees and buildings on the shore; the height, size and passage of the bridge gate; there is no mud field around requirements for slurry concentration and slurry treatment; shore access, mechanical work methods, venues and the requirements for the site of dredging vessels; the assurance of the premises of electricity, energy and logistical maintenance; the degree of River rush, whether the consent to break the homework, construction season and weather etc.
Therefore, the dredging of sand vessels is to be maintained. Before the power on the whole of the drive system and machine oil to inspect the sand, and then pull the conveyor belt of the diesel engine, pulling the clutch, starting the diesel engine, slowly moving loose clutch, rotate the speed to normal. The front zipper bucket of diesel engines, two diesel engines start. Adjust the speed to the required speed. Then loosen the big arm brakes. Slowly put it down, such as the hopper in more than 2/3 sand, can stop decentralization, to 1/3 when the support of the next big arm.
When the big arm and the water surface into 45 degrees angle, should park the big arm. At this time the amount of sand in the hopper switched to traction control. To see how much sand to dig in the bucket, the forward backward to be flexible, such as in the case of sand collapse mechanical work hard or pulling the rope to loosen, so that the boat to retreat, until the excavation. If there is a large stone or mud in the water, the hull will have a violent vibration phenomenon, then should immediately mention digging sand arm, avoid obstacles to proceed.
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