METHOD AND A DEVICE FOR FORMING A FILTERING FIBER CAKE IN AN APPARATUS FOR MEASURING THE BEATING DEGREE OF PULP FLOWING THROUGH A CONDUIT

摘要

ABSTRACT OF THE DISCLOSUREThis invention provides a method and a device in an apparatus formeasuring the beating degree of pulp. According to the invention the sampleof pulp is treated by a rotating flow of fluid having a pressure lying overthe pressure in the conduit during a stirring and/or a dilution period inconnection with the withdrawal of the sample and when the sample is withdrawnfrom the pulp flowing through the conduit the pressure of the flow of fluidis lowered to a predetermined value, which is adapted to the deposit processof the sample of pulp. The fiber cake is deposited onto the strainer disc inan evenly distributed layer, so that a better reproducability in the functionof the apparatus is achieved. Besides a more simple construction which canbe manufactured cheaper than what has been the case before, one also gets abetter guidance of the piston in the cylinder. The cleaning of the injectionnozzles has also been essentially simplified and effectivized.