INJECTOR Russian patent published in 2006 - IPC E02D3/12 E21B33/13 

FIELD: mining and building, particularly for rock strengthening and building structure reinforcement, namely for hardening liquid introduction.

SUBSTANCE: injector comprises supply pipeline provided with outer threads at inlet and outlet ends. The pipeline also has expandable hose and integrated check valve with longitudinal channels. The valve is closable in direction towards inlet pipeline end. The hose encloses the pipeline in air-tight manner by end parts thereof so that elongated annular space is created in-between. Transversal channels are created from one side of annular space in pipeline wall. Channel heads are closed in annular space with elastic sealing rings retained by neighboring fixing rings from both sides. Breakable disc and threaded bush with inner radial bridge are installed from end side of outlet supply pipeline end. The breakable disc is secured by means of pressure ring with cutting inner edge. The check valve comprises ball pressed against longitudinal channel head in supply pipeline, pressure spring and support ring. End of ring brought into contact with breakable disc is provided with transversal slot. Inner diameter of pressure ring is greater than inner diameter of support ring but is less than inner diameter of radial bridge in threaded bush.

EFFECT: improved injector adaptability to in-situ conditions.

3 cl, 3 dwg