Patent GB-191023758-A (GB)
Title: Improvements in and connected with Pumps.
Inventor: BERTELLI ACHILLE
Filed: 1910-10-13
Granted: 1911-08-17
Abstract: 23,758. Bertelli, A. Oct. 13. Combined liquid and air pumps; suction pipes.-In water-raising apparatus, the liquid in the suction pipe is aerated, for which purpose special arrangements of air and water pumps and of suction pipes are used. At the top of the perforated well pipe 1, Fig. 1, are liquid suction pumps 7, an air-pump 8, and an air-vessel 9. Depending in the pipe 1 is the suction pipe 3 having an air injector tube 6 and ball valve 4. The air-pump communicates bv means of a pipe 11 with the space between the pipes, the upper .part of the space being closed by a cap 2. Modifications of the airsupplying means are shown. When two tubes are suspended in a large well, Fig. 4, the outer tube 19 has an open lower end, is provided with a valve, and contains a baffle pipe 22 in addition to the suction pipe 21. A baffle 73, Fig. 24, placed in front of the inlet in the pipe, prevents sand from accumulating and choking the suction pipe. As shown in Fig. 30, the air may be introduced into the pipes above the pump as well as below. The suction pipe may be provided at the inlet end with a number of superposed conical cups 86, Fig. 34, the air being supplied by a tube 90 or by a tube passing down the centre of the suction pipe. The well tube may be made to contain several suction pipes, or may be divided into parts by diaphragms 82, Fig. 32, around the central air pipe 80, the air pipe having a number of branches 84 supplying the compartments 83. When the air tube 30, Fig. 9, is concentric with the suction tube, a valve is used comprising a guide-ring 31 and valve ring 32 of elastic material. The discharge pipe 37, Fig. 16, is connected with a vessel 36 wherein the spent air separates and fresh air is introduced at 39 into the rising main 38. If the delivery pipe has to pass upwards and then downwards, it is divided into two sections at the crown for the passage of air along the upper section and water along the lower, the water passing to a closed vessel to be again aerated. In modifications, the air and water pump may be comprised in one cylinder, an additional airpump of adjustable capacity may be provided, and the air and water pumps may be placed in a line and the pistons actuated in common by a toothed sector 74, Fig. 28, and rack 75. The hand-lever 76 may be connected with a flywheel or adapted to contact with spring levers 77, 78, Fig. 28. In the arrangement shown in Fig. 20, the suction pipe 51 enters an airseparating chamber 46, which is divided into two parts by a vertical filtering-diaphragm 47, and the water leaves by the pipe 48 which may be provided with a concentric filter in place of the diaphragm. The air-pump draws the separated air from the chamber 46 through a pipe 53. For rotary pumps, the air-separating chamber 55, Fig. 21, is in two parts, divided by a partition 56 having an orifice 60 near the top and a smaller orifice 59 at the bottom. Near the partition is a removable filter plate 57 and also the suction pipe 66. The rotary pump 61 is arranged on a lower level than the chamber 55, and its discharge pipe 62 goes to a larger vessel 63 having a valved connexion with the chamber. The priming-water is introduced at 65, and, if necessary, the valve in the pipe 64 is opened to facilitate the priming of the pump.