GB224075A - Improvements in and relating to mixing, conveying and distributing concrete and the like - Google Patents

Abstract

224,075. Schilde, P., Bongardt, E., and Rolland, J. Oct. 18, 1923. Mixing, conveying, and distributing concrete and the like. - An apparatus for mixing, conveying, and distributing concrete, mortar, &c. for use in building operations comprises means for feeding the separate materials, in definite proportions, together with a small quantity of water, to a mixer whence they are forced with a rotating motion through a pipe to the point of distribution where the mass is passed through a second mixing device in which additional water is supplied. The apparatus may be mounted on a telescopic mast, and compressed air may be employed for forcing the mass through the pipe and for producing the rotating movement of the mass therein. The materials are fed to hoppers 5, 7, Fig. 1, from which thev are delivered to a mixer 11 where they are mixed with a small quantity of water and forced through the pipe 42 mounted on the telescopic mast 22 and jib 27 to the mixing device 34 where the additional water is supplied. As shown in Fig. 6, the preliminary mixer consists of a fixed drum 63 in which blades 61 are rotated. The mixed materials are forced into the pipe 42 by a worm 66, rotary motion being imparted to the mass by a rotating conical chamber 68 fitted with a helical blade 69; a blast of air, supplied by a pipe 62 on which the worm 66 is mounted, forces the material through the pipe 42. Additional air blasts may be provided at 33, Fig. 1, along the length of the pipe. The final mixer consists of a two-part double conical chamber 52, Fig. 5, enclosing a casing 53. The water is supplied by an annular perforated pipe 55. In a modification of this part of the apparatus, branch pipes are provided for the egress of the compressed air and scraping or mixing blades are provided which are rotated by an enclosed motor. The part 68, Fig. 6, may be provided with separate helical blades, or may be replaced by a stationary drum in which an auxiliary blast of air is introduced laterally through a branch 84, Fig. 12, and is guided by helical blades 85; this device may be also inserted at points along the pipe length to maintain the rotary motion of the mass.