Hydraulic cutting nozzle with residue filer device
2010
The invention discloses a hydraulic cutting nozzle with a residue filer device, and relates to the technology that high-pressure water jet is adopted for cutting in a coal bed, which solves the problem that the existing hydraulic cutting nozzle without the function of filtering residues is easy to block a hole so as to cause the failed construction of cutting. The invention comprises a punching nozzle positioned on a tip of a shell, and a cutting nozzle positioned on the side of the shell, and is characterized in that: the external part of the shell is provided with a two-segment filter tooththe front part of which is hinged, the front end of the two-segment filter tooth is hinged on the front end of the shell, the back end of the two-segment filter tooth is hinged with a reset spring arranged on the external part of the shell, a position of the two-segment filter tooth after folding, is provided with a disposable plastic hoop, the inner cavity of the shell is provided with a movablecore which is matched with the inner cavity in a sliding way, the front end of the movable core is provided with a positioning convex shoulder which can slide in the front cavity of the shell, and the back end of the movable core is in a spherical surface contacted with steel ball. The invention is beneficial to the popularization and application of the high-pressure water jet cutting technology in the coal-mine gas drainage under suction.
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