Jet is the main component of Boan's core product abrasive water jet coal seam cutter pressure relief device, which is an integrated water-controlled anti-backsorption jet controller researched and developed according to the demand for slag discharge in the actual drilling process of coal mines, and realizes the switching of high and low pressures of the jet by setting a reasonable flow rate range, which really meets the actual needs of the site. The product is characterized by compact size, light weight, easy installation and maintenance, and removable wearing parts.
During the construction work, the conversion valve in the injector can realize normal pressure water drilling and high pressure water cutting; the pressure corresponding to the spool switching is 3~5MPa, and the radius of radial water jet influence is ≥700mm; the adaptable range of f=0.2~1.5 can realize hydraulic cutting; the injector selects the flow precision control system, and it has multiple water flow channels inside, and the switching flow rate is 150~160L/min, which can be adjusted according to the demand. Adjusted according to the demand, it has the function of integrated operation of drilling and slit cutting, avoiding the operation of replacing the drill pipe twice.