GB327531A - Installation for forcing viscous liquid into a container - Google Patents

Abstract

327,531. Stewart & Co., Ltd., D., and Holmes, T. E. March 1, 1929. Actuating by liquid pressure; valve gear.- Apparatus for forcing viscous liquids comprises one or more rams 1, Fig. 1, each working in a hydraulic cylinder 4 and a cylinder 2 for the viscous liquid, the latter cylinder being provided with inlet and delivery valves 10, 11, the operation of which is controlled by the pressure valve of the hydraulic cylinder. The valves 10, 11 are connected to pistons 13', 18<1> in cylinders 14, 19, one side of the pistons being always under pressure admitted through pipes 16, 20 supplied from a pipe 25, which also supplies the cylinders 6 of rams 5 for effecting the return stroke of the ram 1. Hydraulic pumps are connected by pressure and return pipes 35, 41<1> to a valve block 29 fitted with a pressure valve 30, Fig. 3, exhaust valve 31, non-return valve 32, and a valve 33, and the pipe 41<1> is also connected to a storage tank. During the return stroke of the ram 1, the valve 10 is open so that viscous liquid may enter the cylinder 2, and a lever 74 is in the position shown, so that the exhaust valve 31 is open and the valve 30 closed to allow liquid from the cylinder 4 to pass through the pipe 38, non- return valve 32, and valve 31 to the pipe 41<1>. At the end of the return stroke, a tappet 105 acts through members 102 to remove a detent 97 from engagement with a member 92; a weight 89 then actuates the lever 74 to open the valve 30 and allow the exhaust valve 31 to close. Pressure liquid then passes from the pipe 35 through the valve 30 into a chamber 40, whence it passes through the pipe 23 to close the valve 10, and through a pipe 55<1> to close a valve 51 to prevent passage of liquid through a pipe 52 to the storage tank. When the pressure in the chamber 40 reaches a predetermined valve, it acts on a shoulder 106 to open the valve 33 and obtain access to the pipe 38 leading to the cylinder 4; finally the pressure acts through the pipe 23 to open the valve 11, and the forward stroke of the ram 1 is commenced, continuing until a cam 81 returns the lever 74 into position to allow the valve 30 to close to open the exhaust valve 31, and to move the member 92 into engaging position with the detent 97.