Dbt Gmbh

Dbt Automation Gmbh

Patrick Hantke

Sebastian M Mundry

Franz-Heinrich Suilmann

Torsten Boldt

Werner Reinelt

Jens Titschert

Jurgen Romanski

Horst Wagner

An electro-hydraulic assembly for use in underground mining is disclosed. The assembly includes a hydraulic component, such as a valve block for an underground self-advancing roof support, as well as actuators and/or sensors which have a housing and can be connected or are connected via a data-transmission system to a control unit. A function (e.g. withdrawing the support, setting, advancing, or the like) can be activated at the hydraulic component by each actuator, and/or a hydraulic state associated with a measuring point of the hydraulic component or another measured variable associated with the self-advancing roof support can be measured by each sensor. A reader unit is associated with each actuator and/or sensor in its respective housing, and an information element or transponder is associated with the hydraulic component for each function, each control valve, or each measuring point. The information in the information element or transponder is readable by the reader unit and transmittable to the control unit. All the control valves and sensors are coded for the control unit and the control unit can associate each actuator with its corresponding control valve. In this way, it can be known which actuator is associated with which function of the hydraulic component and connection faults can be avoided.

Assembly for use in underground mining

The present invention relates to a pilot control valve, especially for use in mining hydraulics. The valve has a valve insert constructed as a valve cartridge, whose single or multipart valve housing has an input entryfor pressure fluid P, a connection openingfor a load connection A, an output openingopening into the return flow T and an axial boringto accept a valve closing bodyprovided with a closing surface, which can be lifted from a valve sealing seatarranged between the entry openingand the connection openingby means of an electro-magnetic or piezo-electric switching device which can be fastened onto the valve housing. With the lifting movement of the valve closing bodyfrom the valve sealing seatis coupled an at least two part closing mechanism for their separation arranged between the connection openingand the output openingIn accordance with the present invention a single part valve closing bodyis provided, having the sealing surface in the form of a collarand the moving part of the closing mechanism in the form of a shaft sectionwhereby the shaft sectionenters into a boring sectionC of the axial boringduring the lifting movement, closing a radial openingThe valve sealing seatcan be exchanged with a valve sleeveand the nominal bore of the pilot control valve can be changed by means of a throttle

Pilot control valve

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Aachen, Germany

Patrick Hantke