Desilting device for gas lift type water conservancy project

Abstract

The invention relates to the technical field of water conservancy projects, and particularly relates to a desilting device for a gas lift type water conservancy project. The desilting device comprisesan operation frame, wherein a desilting pipeline is arranged on the operation frame; a threaded section is arranged in the upper area of the desilting pipeline; a limiting connecting sleeve is arranged at the top of the desilting pipeline; a lower edge section is arranged in the lower area of the desilting pipeline; a desilting head is arranged at the bottom of the lower edge section; a bottom contact end is arranged at the bottom of the desilting head; a suction hopper is arranged at the bottom end of the bottom contact end; a pressurizing mechanism is arranged on the operation frame; a pressurizing guide pipe is arranged at the gas conveying end of the pressurizing mechanism; a gas lift device is arranged on the desilting head; a pneumatic cavity is formed in the rod end of the pressurizing guide pipe; the pneumatic cavity is in butt joint with the gas lift device; and a pneumatic core is arranged in the pneumatic cavity. According to the desilting device, a gas lift type anti-blocking device is arranged, so that the technical effect of flushing away sludge blockage is achieved; and a sealing reset mechanism is arranged at a nozzle of a gas spraying cavity, so that sludge is prevented from flowing back into the gas lift device.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a desilting device for gas-lift water conservancy engineering. Background technique [0002] In the process of bridge construction, steel sheet pile cofferdams are used for the construction of tie beams and pier columns. The bottom of the cofferdam needs to be cleared to a depth of about 2.5 meters, and the water depth is 6 to 10 meters. Mechanical equipment works on platforms 6 meters away from the water surface. The sediment needs to be cleaned up, and due to construction conditions, underwater excavation machinery cannot be used. After the water in the cofferdam is drained, the efficiency of manual and mechanical cleaning is too low, and the risk of construction safety increases. Due to the small size of the steel sheet pile cofferdam and many purlins and steel supports in the cofferdam, it is difficult to operate with dredgers and underwater excavation m...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of difficult construction operation and slow construction speed in the prior art, it is necessary to choose a small-volume, ground-controlled underwater mud suction equipment, such as a submersible sand suction pump. When the submersible sand suction pump first started The sediment discharge effect is very good, and it can be transported at a high concentration. However, as the bottom cleaning depth increases, the sediment is consolidated and mixed with pebbles, and the sand discharge concentration becomes lower and the impeller of the sand suction pump is easily stuck by the pebbles.

[0004] Chinese patent (authorized announcement number: CN210658506U) discloses a combined gas lift desilting device, through which a water spray device and an agitating device are added near the bottom of the mud discharge pipe; the auxiliary agitation of the compacted sand and gravel layer greatly increases the However, this patent still has certain defects. How to ensure the power source of the stirring device installed at the bottom of the patent, and at the same time, the gas lift device has the risk of sludge flowing back into the gas lift device.

Images