Flush suction sand head

Abstract

The invention relates to a mating device for underwater sand pumping operation, in particular to a novel scouring and absorbing type sand pumping head which comprises a water supply pipe, a large casing pipe, a sand pumping pipe, a small sucker and a large sucker, wherein the water supply pipe communicates with the large casing pipe, the bottom end of the sand pumping pipe is connected with the small sucker, the sand pumping pipe and the small sucker are nested into the large casing pipe, the bottom end of the large casing pipe is connected with the small sucker by a front sealing plate, the top end of the large casing pipe is connected with the sand pumping pipe by a rear sealing plate; a plurality of high pressure sprayers are arranged on the front sealing plate, and the bottom end of the large casing pipe is connected with the large sucker. According to the invention, since the bottom of the large casing pipe is connected with the large sucker, and the smaller sucker and the high pressure sprayer are nested into the large sucker, water-sand mixed liquid stirred up by the high pressure sprayer can be limited to the area of the large sucker, so as to prevent silt from being directly washed away by water current to be far away from a sand pumping port, thus improving sand pumping efficiency.

Description

technical field [0001] The invention relates to a supporting device for underwater sand pumping operation, and more specifically, relates to a novel flushing type sand pumping head. Background technique [0002] At present, the main sand pumps on the market can be divided into ordinary sand pumps, twisted suction sand pumps and flush suction sand pumps according to their working methods. Ordinary sand pumping head refers to the method of directly pumping sand through the power of the sand pump without any auxiliary facilities. This method has low sand pumping efficiency and is not conducive to widespread use. The twisted suction sand suction head lifts the deposited sand on the sand bed by turning the reamer head at the end of the sand suction head, and makes the sand and water fully mixed, so as to improve the efficiency of sand pumping. The flushing sand suction head uses a high-pressure water pump to generate pressure water, impacts the sediment through a high-pressure w...

AI Technical Summary

Problems solved by technology

[0003] However, the commonly used flushing sand pumping head usually separates the water gun from the sand pumping head, and the front end of the sand pumping head is directly connected to the filter screen or filter frame, without a bell mouth or other auxiliary sand pumping structures. After kicking up, the sediment may be directly washed away by the water flow away from the sand pumping port, which will affect the sand pumping efficiency

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