Method for identifying blockages in sprinkler devices and apparatus for carrying out this method

Abstract

In a method for identifying blockages in sprinkler devices (2) on heading and mining machines, the pressure and the flow rate of the medium to be fed to the sprinkler device are measured, the measuredvalues are fed to an evaluation circuit and compared with the desired characteristic curve (12), which is measured for the sprinkler device, for the dependence of its flow rates on the operating pressure of a fault-free sprinkler device. Deviations from the desired characteristic curve of a fault-free sprinkler device are displayed and / or used as control signals for driving the heading and / or mining machine. The apparatus for carrying out the method is characterized in that a pressure sensor (4) and a flow rate sensor (7) for the medium which is to be fed to the sprinkler device are provided,the measured values from these sensors being passed to an evaluation circuit via signal lines; in that the evaluation circuit contains a memory for desired characteristic curves (12, 18) of the pressure-dependent profile of the flow rates of a fault-free sprinkler device and provides characteristic maps for the permissible deviation from the desired characteristic curve, and in that the evaluation circuit is connected to a display apparatus and / or a control element of the drive of the heading and mining machine.

Description

technical field [0001] The invention relates to a method for detecting a blockage of a sprinkler system of a road-driving or mining machine and to a device for carrying out the method. Background technique [0002] It is known in tunneling and mining machines to supply a cooling liquid to the tunneling face or chisel through nozzles, the injection of this cooling liquid should prevent impermissibly high temperatures on the tunneling face and by means of this way to eliminate the possibility of sparks and explosions. Depending on the type of medium supplied, it is also possible to spray liquid through such nozzles in such a way that excessive dust generation is avoided. However, nozzle clogging can occur in such nozzles due to contamination of the cooling liquid, which in turn leads to an insufficient supply of cooling liquid and sparks and explosions can no longer be reliably avoided. Can be known in EP 188188 and be used for spraying out the equipment of this type of cool...

AI Technical Summary

Problems solved by technology

That is, such an assembly may also enable operation when one or more water nozzles are blocked or when the valve associated with the one or more water nozzles remains closed, since only pressure is sensed for control, and even though flow rather than pressure is sensed, a pipe rupture can still cause the component to fail

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