Hydropneumatic pumping installation - has main and auxiliary distributors with two-way feedback booster links to prevent false tripping

The pneumo hydraulic pump for welding forge and press shops has double-acting boosters and two-position distributors, with an interlock to control the booster piston movement. To prevent false tripping, an additional power distributor (39,40) is provided for each booster (2,3). Two control distributors (41,42) regulate the distributors (35,36,39,40) linking the pneumatic sides (6,7 and 14,15) of the respective boosters to one another. The main and additional power distributors have inputs directly connected to the air supply (34), with the output (39a) linked to the booster air space (2,7). The control distributors (37,38) simultaneously switch one additional distributor in the first booster (2) and the power distributor of the second booster (3). The inputs of both sets of control distributors connect to the air supply. The output of the first booster distributor links to the control space of the second distributor. The first booster connects to the control space (40c) on the second booster (3). The first booster outputs link to the air sides and output through valves (43,44) to the second booster power distributors, which output to their respective air spaces (14,15). L'INVENTION CONCERNE LES INSTALLATIONS DE POMPAGE.L'INSTALLATION FAISANT L'OBJET DE L'INVENTION EST CARACTERISE NOTAMMENT EN CE QUE L'APPAREILLAGE DE DISTRIBUTION PNEUMATIQUE COMPORTE DEUX AUTRES DISTRIBUTEURS DE FORCE A DEUX POSITIONS 39 ET 40 UN POUR CHAQUE MULTIPLICATEUR PNEUMOHYDRAULIQUE A DOUBLE EFFET 2 ET 3 ET DEUX AUTRES DISTRIBUTEURS DE COMMANDE PNEUMATIQUES A DEUX POSITIONS 41 ET 42 UN POUR CHAQUE MULTIPLICATEUR PNEUMOHYDRAULIQUE A DOUBLE EFFET 2 ET 3 DESTINES A COMMANDER CONJOINTEMENT LES DISTRIBUTEURS DE FORCE A DEUX POSITIONS 35, 36, 39, 40, RESPECTIVEMENT, DE CHAQUE MULTIPLICATEUR PNEUMOHYDRAULIQUE A DOUBLE EFFET 2, 3, LES ENCEINTES PNEUMATIQUES 6 ET 7 DE L'UN 2 DES MULTIPLICATEURS PNEUMOHYDRAULIQUES A DOUBLE EFFET ETANT MISES EN COMMUNICATION A TRAVERS LES DISTRIBUTEURS DE FORCE A DEUX POSITIONS CORRESPONDANTES 35, 36, 39, 40 DE L'UN ET DE L'AUTRE MULTIPLICATEURS PNEUMOHYDRAULIQUES A DOUBLE EFFET 2, 3 AVEC LES ENCEINTES PNEUMATIQUES 14, 15 DE L'AUTRE MULTIPLICATEUR PNEUMOHYDRAULIQUE A DOUBLE EFFET 3.L'INVENTION S'APPLIQUE NOTAMMENT AUX INSTALLATIONS DE POMPAGE UTILISEES PAR LA COMMANDE DES ROBOTS INDUSTRIELS.