Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1997-09-04
2000-05-02
Lillis, Eileen Dunn
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
405288, E12D 1544
Patent
active
060564814
ABSTRACT:
According to the invention, monitoring the load on hydraulic powered shield supports in underground use is performed by using the controller (13) serving for extraction control, which is equipped with microelectronics for load monitoring and load control, the components of the powered shield support being assigned sensors (14 to 18) whose electric measured values are used by the controller (13) for evaluating the measured signals and for driving the hydraulic rams (6, 7) and/or the angle cylinder (11) assigned to the powered shield support. The load control is preferably designed here in such a way that the critical load situations "one-sided loading" and/or "tip-toeing" are detected as early as during the setting operation, with the aid of appropriate sensors, and are rendered non-damaging in their effect by appropriately driving the hydraulic rams and/or the angle cylinder.
REFERENCES:
patent: 4474510 (1984-10-01), Bull
patent: 4693640 (1987-09-01), Berger
patent: 4755084 (1988-07-01), Peters et al.
patent: 4887935 (1989-12-01), Koppers et al.
patent: 5523638 (1996-06-01), Merriman
VON DER Linden Walter
Watermann Willy
Weigel Wilfried
DBT Automation GmbH
Lagman Frederick
Lillis Eileen Dunn
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