Double grouting nozzle device with self opening and closing function

Abstract

The invention protects a double grouting nozzle device with a self opening and closing function, and is the double high-pressure grouting nozzle device with an automatic opening and closing cover plate. The double grouting nozzle device with the self opening and closing function comprises a drill body and a piston body, a piston rod and pull rods are assembled in a cavity of the piston body, the pull rods comprises two groups of pull rods, the two groups of pull rods are respectively and symmetrically distributed on the upper and lower ends of the piston rod, and the two groups of pull rods respectively penetrate through second locating sleeves arranged on the periphery of the tail parts of the pull rods and are connected with the cover plate though set screws. The double grouting nozzle device with the self opening and closing function can be built in a drill pipe body, the cover plate is in a sealing state during an off working state and covers nozzles, and blockage and damage of a drilling rig caused by inpouring of outside stratum pressure grout into the nozzles and a drill pipe can be effectively avoided; during a working state, a piston is forced to retreat by the grout withhigh pressure and compressed air, the pull rods and the cover plate are driven to move through linkage, the cover plate is opened instantaneously, and then the grout is erupted from the nozzles.

Description

technical field [0001] The invention relates to the technical field of nozzle devices, in particular to a double grouting nozzle device with self-opening and closing functions. Background technique [0002] The development of roads, bridges and rail transit has driven the huge construction demand of foundation engineering. In the field of foundation engineering construction, it often needs to involve deep foundation pit construction, foundation improvement construction, water-stop curtain grouting construction, and high-quality precision grouting construction, And the multi-angle high-pressure rotary jet grouting construction technology that goes deep into the formation is more and more applied and promoted because of its high efficiency and less construction interference. However, the traditional high-pressure rotary jet grouting nozzle device is essentially open. Both the slurry channel and the high-pressure gas channel are susceptible to the pouring of back slurry, formin...

AI Technical Summary

Problems solved by technology

[0002] The development of roads, bridges and rail transit has driven the huge construction demand of foundation engineering. In the field of foundation engineering construction, it often needs to involve deep foundation pit construction, foundation improvement construction, water-stop curtain grouting construction, and high-quality precision grouting construction, And the multi-angle high-pressure rotary jet grouting construction technology that goes deep into the formation is more and more applied and promoted because of its high efficiency and less construction interference. However, the traditional high-pressure rotary jet grouting nozzle device is essentially open. Both the slurry channel and the high-pressure gas channel are susceptible to the pouring of back slurry, forming a blockage. In order to overcome this fundamental defect during construction on the construction site, it is necessary to maintain The water spray state not only wastes water resources, but also causes damage to the existing project quality, affecting the effect of pile formation and grouting

[0003] Structurally, the traditional double nozzle device needs to design and install the structure of the slurry nozzle and the air nozzle separately, which increases the complexity of manufacturing and assembly, and easily causes the two sets of nozzles to be out of center, affecting the spray effect

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