Patent GB-191310214-A (GB)
Title: Improvements in or relating to Means for Feeding Pulverulent Material to Furnaces.
Inventor: PORAT KARL HJALMAR VILHELM VON
Filed: 1913-04-30
Granted: 1914-01-01
Abstract: 10,214. Porat, K. H. V. von. April 30. Mechanical stoking; air supply and draught, regulating. - Locomotive and like boiler furnaces particularly of the kind described in Specification 6639/13 are provided with special means for feeding the furnace with pulverulent material, such as peat, and with means whereby the supply of fuel and air to the furnace and the steam-jet blower may be controlled simultaneously by the driver. The fuel is stored in a receptacle 1, Figs. 1 and 3, arranged on the locomotive tender 2 and is fed in regulable quantities by the sliding valve 17 to the funnel 9 of the tube 4 through which it is fed by a steam or like injector 66 arranged at the forward end, and enters the furnace 3 with a supply of heated air from the casing 5. Air may enter the tube 4 through its open end 10. Stirring-devices 13 mounted on rotary shafts 11, 12 are arranged within the receptacle and driven by a piston working in a cylinder connected to a receptacle containing fluid under pressure or with a vacuum receptacle or the like by a tube provided with a valve which may be combined with the lever of the locomotive regulator or with the valve of the auxiliary steam-jet blower. The controlling - valve 17 may be operated by a piston 19 controlled by a spring 21 and subjected to fluid pressure or vacuum. The stirrer may be supported by the valve 24, as shown in Fig. 5, and its lower end may be connected loosely to the funnel 9 of the tube 4 so that the stirrer is subjected to the longitudinal and lateral vibrations of the locomotive tender. Other modifications in which the vibration of the tender is communicated to the stirrer are described and shown. Upon the same shaft 30, Figs. 8 and 10, as the regulator handle 36 is provided a disk 31 having small recesses with which engages a pawl 32 acted on by a spring 32<x> and mounted on a threearmed lever 33, 34, 35 on the regulator shaft 30. The arm 33 forms an index moving over a graduated dial 42, while the arm 35 is connected through a system of links and levers 37, 38, 39 with the valve 17 of the fuel receptacle and by means of links 40, 57, 56 to the air-supply damper 41. The fuel and air supply may by the above-described means be controlled by means of the regulator handle 36 or by means of the lever 33 ... 35. The valve 17 is also controlled by the steam pressure in the boiler acting upon the piston in the cylinder 43. To prevent the lever 33 ... 35 being turned when either the regulator or the auxiliary steamjet blower is closed, a locking-lever 46 pivoted at 45 is provided. One end 51 of this lever is arc-shaped and engages with the lever 33 ... 35 and bears against an eccentric 47 on the shaft 30. The opposite end of the lever is provided with a right-angled slot with which engages a pin 49 on the lever 50 for actuating the steamjet blower. On opening the regulator the lever 46 is raised and the lever 33 ... 35 released. Also on starting the steam-jet blower by swing- ing the lever 50 to the right, the lever 46 is also actuated by the pin 49 and the lever 33 ... 35 is released. By turning the lever 33 ... 35, a shoulder 52 on the arm 33 passes beneath the end 51 of the lever 46 and locks it, so that the blower cannot be shut off until the fuel supply is stopped by closing the valve 17. The damper 41 is adapted to be actuated by the hand-lever 58, by the steam pressure of the boiler acting upon a piston in the cylinder 60, or by the lever 33 ... 35. As shown in Fig. 11, the lever 33 ... 35 is connected by a link 40, lever 62, and link 63 with the valve 65 of the injector 66. On opening the valve 65, steam is also admitted to a cylinder 67 so as to actuate a piston for operating a valve 90 in the fuel - conduit 4. In order that it may be possible to shut the blower when the regulator has been opened, the lever 46, Figs. 12 and 13, is provided with a joint at 70 which permits the end facing the shaft 30 to be moved transversely. The arc-shaped part 51 is provided at the front with teeth adapted to engage with teeth 73, Figs. 13 and 14, on the arm 33 and also with a pin 71 engaging with a special form of slot 72 in the disk 31. Upon opening the regulator, the slot 72 causes the teeth 73 of the part 51 to co-operate with the teeth on the arm 33, and upon further opening the regulator, the shape of the slot 72 causes the teeth to become disengaged so that the lever 33 ... 35 may participate in the motion of the regulator lever and cause the fuel-supply and air valves to be opened. Upon swinging the lever 50 to start the blower, the part 51 is raised and the .arm 33, which is provided with a lug 74 engaging normally with the arm 51 to prevent its movement, is released. By turning the lever 33, the lug 74 passes beneath the part 51 so that the steam blower cannot be closed until the fuel supply is shut off. In a further modification, shown in Fig. 17, the lever 33 ... 35 is arranged so that it does not partake in the movement of the regulator, but the air and fuel supply valves are closed automatically when the regulator is closed. The disk 31 is provided with a hook 75 acted upon by a spring 76. On shutting the regulator, whereby the disk 31 is also rotated, the hook 75 engages with a shoulder 77 on the arm 33 and the valves 17, 41 are shut. At the end of the movement, the hook 75 is forced downwards by an inclined surface 78 on the regulator box and the lever 33 ... 35 is released. A modification is described and shown in which the regulator and steam blower are so combined that when one is open the other is closed, so that a continuous draught is produced. The air and fuel supply valves are then operated independently of the regulator. A further modification is described in which the fuel and air controlling-lever is mounted on a regulator shaft which is adapted to be moved longitudinally. The lever 46 may be dispensed with, and the blower lever 50 may be connected directly to the arm 33 as shown in Fig. 22, or the lever 50 alone may be used to operate the air and fuel supply-valves. and the lever 33 ... 35 omitted. The valve 17 for controlling the fuel may, as shown in Fig. 24, be made in two parts 94, 95, the part 94 being movable in the frame and the part 95 movable in the part 94. The part 94 is actuated by the lever 33 ... 35 and the part 95 by steam pressure acting in the cylinder 97. Fig. 30 shows a modified arrangement for connecting the tube 4 to an upwardly projecting nozzle having an opening 104 for the escape of water of condensation and admission of air. The nozzle is provided with a steam-jacket 106. The fueldelivery nozzles may be of the form shown in Fig. 31 or arranged as shown in Fig. 32.