METHOD AND SUCTION DREDGING INSTALLATION FOR CONVEYING A SUSPENSION OF MAINLY DREDGING SPOIL AND WATER THROUGH A PIPE

摘要

1,272,152. Dredging. INGENIEURSBUREAU VOOR SYSTEMEN EN OCTROOIEN SPANSTAAL N.V. 23 April, 1969 [24 April, 1968], No. 20836/69. Heading E1F. [Also in Division G1] In an apparatus or method of assaying a mixture, which includes water, any other substance (such as dredging spoil) and a gas, flowing through a pipe, pressure at upper, middle and lower conduits are picked-up by pressure difference pick-ups 443, 496 and 497; the pressure in upper conduit sections 492, 493 being higher than in the lower conduit sections; velocity meters 424j, 424k indicate the mixture velocity respectively in the upwardly and downwardly directed portions of the "U" shaped pipe, and the density of the mixture is thus obtained so that it is then possible to calculate the amount of other substance, such as dredging spoil, in the mixture. By passing the measured results to a calculating amplifier, provided with factors according to a formula and integrating the output over a specified time the total volume of dredging spoil, passing in such specified time, can be determined.