It is understood that for more than 10 years, the province's Xiangshui, Ziyu, Handan and Fujian "four waters" and Dongting Lake sand and gravel transport vessels are mainly self-unloading sand transporters with belt conveyors, and the province's existing dump trucks. More than 1,400 ships with a total tonnage of 1.25 million tons, accounting for 20% of the total number of freighters in the province and 43% of the total cargo capacity of the province. Each ship's bow is equipped with a rotating steel structure that is self-unloading. It can only move slightly up and down, and it stretches forward from the bow. According to the tonnage of the hull, it is generally 45° from the horizontal line of the river. It stretches from 16 meters to 20 meters, and the longest is 30 meters to 40 meters long. It looks like a "giraffe".
The loading and unloading belt frame of Hunan traditional dumping sand ship is several tens of meters long, which causes the hull to receive a large wind area and high center of gravity when the ship is sailing, which seriously affects the stability and maneuverability of the ship and endangers the safety of navigation. There are major safety hazards. Water accidents caused by the stability of the sand ship have occurred from time to time. Not only that, because the length of the self-unloading sander belt conveyor extends the bow to 40%-60% of the length of the hull, and the self-unloading sander belt conveyor increases the total length of the ship, so that the ship needs to pass through the ship lock hub. Taking up twice the area of ​​the lock chamber of other ships also increases the difficulty of entering and leaving the ship lock. Ships often need to stop at the upper and lower reaches for a long time to pass, even in the event of a collision.
In order to completely solve the problems existing in the belt transport system of the dumping sand ship, Yiyang Chenguang Machine Manufacturing Co., Ltd., after nearly two years of research, adopts the most advanced and safest technical solutions in China, and transforms the traditional upright belt frame into a segmented folding belt. The self-unloading device can recover the belt self-unloading device through the hydraulic system during the navigation of the ship, which not only enhances the stability of the ship, but also facilitates the operation of the ship, ensures the navigation safety and the navigation efficiency of the ship lock, and scientifically solves the operation of the sand transport ship. The contradiction between safety and efficiency.
At present, five of the six series of patents declared by the self-unloading sandbag folding belt dumping device to the National Patent Office have been approved and one is pending. In the future, Hunan Province will carry out technical transformation of sand and stone vessels in batches, and gradually promote the device on the “four waters†and Dongting Lake gravel ships in Hunan, capital, Fujian and Jiangxi.
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