dredger

dredger

Dredger, also known as clear mud boat, is clear dig waterways, ports, lakes and other waters of the silt, dredging flood discharge engineering ships. There are mainly rake suction dredger and hinge suction dredger.

A construction ship that excavates soil, sand and gravel under water. Dredger has cutter suction type, suction type, chain bucket type, bucket type and grab type, etc.

Suck up the dredger

A dredger that uses a dredge pump to lift the mud to a mud chamber or a mud discharge site after the formation of sediment at the bottom. There are mainly rake suction dredger and hinge suction dredger.

Rake suction dredger

The soil is loosened by the mud rake in front of the suction mouth, which is mainly used for dredging channels. Its middle is equipped with open bottom mud tank, its volume indicates the size of the ship, in cubic meters. Mud harrows have single or double harrows. Single rake placed on either side or amidships or stern; The double harrows are placed on both sides. After raking the mud, the mud is sucked into the mud chamber with a mud pump. Rake suction dredger can be self-propelled, the mud tank is filled, the ship to the designated place to throw mud, or the use of elevated edge throwing, overflow and other methods of throwing mud. Rake head, rake teeth, mud pump lining board are made of high manganese steel, suitable for digging mud and sand clay, dredging depth of 4 ~ 24 meters, the production capacity of about 1000 ~ 12000 cubic meters per hour. The discharging pipe has floating water discharging pipe and land discharging pipe, the former can move with the ship. The mud discharge distance can be up to 5000 meters. In addition to the movement of the ship position by the cutter, the two long positioning piles at the stern can also be used to operate alternately, so that the underwater dredging surface is smooth. Hinge suction dredger suitable for digging clay and sand mud, dredging depth of 4 ~ 30 meters, production capacity of about 40 ~ 4000 cubic meters per hour.

In addition, there are high pressure water suction dredger and high pressure mud pump suction dredger. They are the use of high pressure water pump through the nozzle of the mud sand washed away or with high pressure mud pump with suction head of mud suction away to the designated location. The pressure is usually more than 10kg force/cm2. They are suitable only for dredging sand and non-cohesive soils. Chain bucket dredger the use of a set of chain bucket dredger equipment in the bottom of the continuous excavation of mud and sand dredger, used for digging and filling pool, also used for digging base trough, generally non-self-propelled type, also have self-propelled type. The chain bucket dredging device is mainly composed of a bucket bridge and a chain bucket. Bucket bridge is located in the rear groove of the ship, one end is fixed on the five square wheels at the top of the bridge, the free end is equipped with six square wheels, and a set of bucket chain is installed along the bridge deck. The bucket chain is connected by 20 ~ 76 chain buckets, and the bucket is directly connected with the bucket, and the chain plate is also connected. The bucket capacity is 0.2 ~ 0.8 cubic meters. By the main engine through the vertical shaft or by the motor through the reduction gear to rotate the upper five square wheels, the lower end through the six square wheel rotary bucket chain for dredging. The excavated mud is poured into the mud trap when the chain bucket is turned to the top of the bucket bridge, and discharged to the mud barge by the chute, and then transported to the designated place by the mud barge or blown to the shore by the mud boat. The chain bucket dredger is suitable for digging hard soil, the mud surface is smooth after digging, the depth of dredging is 3 ~ 40 meters, and the production capacity is 20 ~ 1000 cubic meters per hour.