Patent GB-346711-A (GB)
Title: Improvements relating to means for controlling or operating water gas apparatus
IPC: C10J3/24
Filed: 1930-01-15
Abstract: 346,711. Water gas plant. BREISIG, A., 46, Erdbrustgasse, Vienna. Jan. 15, 1930, No. 1462. Convention date, Jan. 15, 1929. [Class 55 (i).] In automatic electro-hydraulic control of the duration of the "blow" and "run" in water-gas plants, in which the " blow " is kept constant and the "run" made dependent upon the temperature of a water vaporizer, surplus water from the latter is collected in a leaky vessel which by variation of its weight controls the operating periods. The control vessel only closes the electric circuit for the actuating mechanism of that valve member which is to be reversed first in the working period, this member in common with succeeding members being provided with an electric interrupter which is connected in the circuit of the next member to be reversed so that the transmission of power to the actuating mechanism of the members will only begin when the member to be reversed has attained its new final position. The Figure shows an arrangement for controlling the stack and air blast valves, and represents the positions of the control members during the "run." The water vaporizer 2 is mounted on the producer 1. The air blast valve 3 and stack valve 4 are each connected to pistons 3a, 4a which are lifted by water pressure through pipe lines 5, 6 and close under their own weight when this pressure is removed. The valves are controlled by a double slide valve 7. 8 into the box of which open the lines 5, 6 leading to the valves, two admission lines 9, 10 for water under pressure and two discharge lines 11, 12. The double slide valve is connected to a rack 13, the back of which carries contacts 14, 15 insulated from the rack and joined to a sliding contact 16. The latter slides on a line 17 leading to a current reverser, each half of which is connected to the poles of a motor 21 respectively. The motor is made to drive a toothed wheel 26 engaging the rack 13. A contact 27 connected to the positive source of current, slides on a cable 28 carrying on one side the control vessel 29 and on the other contacts 30, 31. The vessel 29 receives the surplus water from the vaporizer at the end of the "run" and sinks when the filling has attained a predetermined degree, and rises when its contents discharge. Contacts 32, 33 connect to contacts 35, 37 by lines 34, 36 respectively. A branch 38 of line 36 is connected to line 34 across the circuit brakers 39, 40. The closed position of blast valve 3 bridges the circuit breaker 39. The circuit breaker 40 is controlled by a solenoid 41, the coil of which is connected to lines 42, 43 respectively. The former leads through circuit breaker 44, bridged by the closed position of the chimney valve, to the positive source of current and the latter through solenoid 46 to the negative source of current. The solenoid 46 causes the current reverser to swing over. The open position of valve 3, closing the gap 48, completes a circuit between the poles of the current source including solenoids 53, 51. The former causes the current reverser to return to its original position, and the latter actuates circuit breaker 54 one terminal of which is connected to line 36 and the other to line 56, the circuit breaker 57 of which is closed by the open position of the stack valve. At the commencement of the cycle of operations, the stack and blast valves are closed. The lower position of the control vessel causes 30, 32 to contact which completes a circuit, through contacts 35, 14, which through the current reverser supplies current to the motor causing it to rotate clockwise. The movement of the rack and therefore of the slide valve establishes a connection between pressure lines 6, 10, resulting in the lifting of the stack valve. The latter by completing a circuit through contacts 37, 15 causes further rotation of the motor clockwise which by further movement of the rack and slide valve establishes a connection between pressure lines 9, 5, resulting in both blast and stack valves now being open. The opening of the blast valve closes a circuit, which results in the current reverser being swung over, the motor being rotated anticlockwise resulting in both blast and stack valves remaining open. The latter obtains until the control vessel rises when a further anticlockwise movement of the motor results, the blast valve closing. The latter results in a final anticlockwise movement of the motor which results in the closing of the stack valve. The current reverser returns to its original position, the motor is actuated clockwise, and the cycle recommences. All the valves of a water-gas generator may be similarly controlled.