Injection, sealing valving and passageway system

摘要

The invention provides an injection, sealing, valving and passageway system for use with hollow rock bolts and hollow injection bars used in mining, civil engineering, tunneling and construction including use with hollow self drilling rock bolts. The invention comprises a plurality of passageways with one or more one way flow valves along the passageways. The invention enables one or more fluids to be pumped into a hollow rock bolt or other hollow elongate member either sequentially or simultaneously without cross contamination of fluids in another passageway or back flow of fluids along the wrong passageway. The invention is typically used to install self drilling rock bolts whereby a drilling fluid is initially pumped through the hollow bolt during the drilling cycle, and then a two part chemical resin or cement grout is pumped through the hollow bolt to anchor the bolt in the borehole.

主权项

1. An injection, sealing, valving and passageway system for injecting fluids for use with a rock bolt, a cable bolt or a hollow injection bar, comprising:
an injector having a first plurality of fluid passageways configured for fluid to flow along one of said first plurality of fluid passageways without cross contamination with fluid flowing along another one of said first plurality of fluid passageways; a valving assembly contained within a hollow member of the rock bolt or cable bolt or injection bar, the valving assembly having a second plurality of passageways communicating with said first plurality of passageways; a connection providing a hydraulic seal between the first passageways of the injector and the second passageways of the valving assembly both in presence and absence of relative rotation between the injector and the valving assembly; and at least one of the second passageways has at least one one-way flow valve to prevent backflow of fluid into the injector, wherein fluids injected through at least two of said first plurality of passageways of the injector are kept separate until downstream of the one way flow valve.