Device for treating metal workpieces with cooling gas
In order to achieve an increase in energy efficiency and a faster quenching of the workpieces, a device according to the invention is proposed for the treatment of metallic workpieces with cooling gas, comprising a horizontally arranged cylindrical housing ( 1 ) with at least one closable opening for the introduction and extraction of the workpieces to be treated, with a quenching chamber ( 2 ) located inside the housing ( 1 ) for receiving the workpieces to be treated, with two high-performance fans ( 5 and 6 ) arranged laterally and outside the quenching chamber ( 2 ) for guiding a cooling gas through the quenching chamber ( 2 ) and with two heat exchangers ( 11 and 12 ) for cooling the cooling gas, that heat exchanger ( 11 or 12 ) is respectively associated with a high-performance fan ( 5 or 6 ) and that closable guide devices ( 17 or 18 ) are arranged above and below the quenching chamber ( 2 ).
1. A device for the treatment of metallic workpieces with cooling gas, comprising a horizontally arranged cylindrical housing ( 1 ) with at least one closable opening for the insertion or extraction of the workpieces to be treated, with a quenching chamber ( 2 ) lying within the housing ( 1 ) for receiving the workpieces to be treated, with two fans ( 5 and 6 ) arranged laterally and outside the quenching chamber ( 2 ) for guiding a cooling gas through the quenching chamber ( 2 ) and with two heat exchangers ( 11 and 12 ) for cooling the cooling gas, characterized in that a respective heat exchanger ( 11 or 12 ) is positioned to receive the cooling gas from one of the fans ( 5 or 6 ) and that movable gas flow guide devices ( 17 and 18 ) are arranged above and below the quenching chamber ( 2 ), wherein the movable gas flow guide devices each comprise a guide box ( 19 , 20 ) and a guide element ( 21 , 22 ), said guide boxes being connected to each other by connecting struts ( 27 , 28 ), said guide boxes being movable by a traversing unit for opening or closing suction openings ( 29 ) for each fan ( 5 , 6 ), one of said suction openings being positioned above and laterally next to the quenching chamber ( 2 ) and another of said suction openings being positioned below and laterally next to the quenching chamber, whereby the gas flow guide elements ( 21 , 22 ) are operable to.
2. The device according to claim 1 , characterized in that the heat exchangers ( 11 and 12 ) are ring-shaped.
3. The device according to claim 2 , characterized in that each ring heat exchanger ( 11 or 12 ) surrounds an impeller ( 9 or 10 ) of the associated fan ( 5 or 6 ).
4. The device according to claim 1 characterized in that each guide box ( 19 or 20 ) has two side walls ( 23 and 24 ), between which guide plates ( 25 ) are arranged, which form guide channels ( 26 ) for guiding the cooling gas.
5. The device according to claim 4 characterized in that a traversing path of the guide boxes ( 19 and 20 ) is dimensioned such that the suction openings ( 29 ) are closed by the side walls ( 23 and 24 ) of one of the guide boxes ( 19 , 20 ) when the guide channels ( 26 ) are opened by the other guide box ( 20 , 19 ).
6. The device according to claim 1 characterized in that the guide elements ( 21 and 22 ) are fastened on the inside of the housing ( 1 ).
7. The device according to claim 6 characterized in that each guide element ( 21 or 22 ) is configured v-shaped in cross-section, that the surface of the guide box ( 19 or 20 ) facing the guide element ( 21 or 22 ) is designed such that guide boxes ( 19 or 20 ) whose guide channels ( 26 ) are closed abut the guide element ( 21 or 22 ).