Trailing suction hopper dredger side suction port water acting piston-type sealing device

Abstract

The invention relates to the technical field of dredging engineering machinery, and discloses a trailing suction hopper dredger side suction port water acting piston-type sealing device which includesa slider body, a water pressure chamber, a sealing ring, a gland, a return spring, a water inlet pipe, and a throttle tube; the water pressure chamber is arranged on the side, facing a hull, of the slider body, the water pressure chamber is connected to a high-pressure flush pipe through the water inlet pipe, the sealing ring is located in the water pressure chamber, and a protrusion at the top of the sealing ring faces the hull; and an elastic ring is fixed on the protrusion, the gland is fixed to a slider and presses the two sides of the protrusion of the sealing ring, and the return springis located between the inner side of the gland and the sealing ring. The trailing suction hopper dredger side suction port water acting piston-type sealing device has the advantages that the water pressure in the high-pressure flush pipe is used as the power to drive the sealing ring to move without additional power; the water pressure chamber and the seal ring are used to replace an air bag, andthe service life of the sealing device is prolonged; and the polymer elastic ring at the top of the sealing ring can be used for effectively reducing friction and can adapt to the relative movement between the slider and a suction port, and a good seal is maintained.

Description

technical field [0001] The invention belongs to the technical field of dredging engineering machinery, and in particular relates to a water-acting piston type sealing device at the side of a side suction dredger of a drag suction dredger. Background technique [0002] The existing trailing suction dredger is a large self-propelled trailing suction dredger equipped with a drag head excavator and a hydraulic dredging device. When dredging, the rake suction pipe is lowered along the side of the ship, and the slider installed on the upper end of the rake suction pipe is moved to the dredging nozzle on the side to connect with the suction port of the hull, and at the same time, a high-pressure flushing pipe is connected to the rake head. A set of high-pressure nozzles is set on the rake head, and the lower end of the rake suction pipe falls on the river / sea bed. During the dragging of the ship, the high-pressure nozzles of the rake head impact the river / sea bed, stir up the sedim...

AI Technical Summary

Problems solved by technology

Due to the relative movement between the slider and the mud suction port, the inflated airbag will be rubbed against; if the airbag inflation pressure is too small, the sealing effect will not be achieved. Or too small will accelerate the wear of the airbag; because the airbag is an elastic part and lacks support, when it is installed into the slider, if it is installed improperly, it will easily cause a small part of the airbag to protrude from the slider, so that it will be broken when it is put into the water

At present, many design units and shipyards in the industry are publicizing this problem, and they have not been able to solve it

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