Programmed pressure regulator for controlling the supply of gas

Details Programmed pressure regulator for controlling the supply of gas Programmed pressure regulator for controlling the supply of gas

1977-04-26

1979-04-03

Lake, Roy

Metallurgical apparatus

Means for cutting solid metal with heat, e.g., blowpipes

B23K 3700

Patent

active

041473337

ABSTRACT:
Pressurized gases supplied to a load device such as metal flame cutting torch includes separate dome regulators for each gas supply. Each regulator includes a pressure responsive input chamber connected to the corresponding supply by a supply solenoid valve. A second solenoid valve connects the input chamber to the discharge side of the dome regulator. A pressure transducer senses the output pressure of the regulator and develops a feedback signal which is compared with a reference signal in a differential amplifier to generate an error output signal. The reference signal may be manually set or be derived from a programmed numerical control, a tape control or the like. The valves are totally opened and closed. Restricted orifices are connected downstream of the solenoid valves to permit soft changes in the load gas flow. In an oxygen gas cutting control, a separate adjustable orifice provides for controlling the piercing rate. Solenoid operated dump valves are connected to dump the regulator and main line of the cutting oxygen.

REFERENCES:
patent: 3369561 (1968-02-01), Zimmerman et al.
patent: 3464438 (1969-09-01), Maurer
patent: 3533442 (1970-10-01), Lange et al.
patent: 3726307 (1973-04-01), Carman et al.
patent: 3823928 (1974-07-01), Stolin et al.

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