Patent GB-206248-A (GB)
Title: Improvements in apparatus for charging furnaces of gas retorts and the like
IPC: C10J3/30
Filed: 1922-08-04
Abstract: 206,248. Gibson, R. E., and Nicoll, H. Aug. 4, 1922. Charging and discharging.-Relates to apparatus for handling hot coke discharged from retorts, coke ovens &c. of the kind described in Specification 175,618 and comprises mechanical means for discharging the movable coke-receiving tube 5, safety interlocking means relating such discharge device and the tube hoisting means to the position of the coke tube, a special lining for the coke tube and various arrangements whereby the front end of the tube may be brought close to the retort mouths at any height in the setting. The discharging-device described consists of a ram-head 12 carried at the end of a chain 13 running in curved guides and formed with teeth engaged by a driving-sprocket 15. The power is transmitted through a clutch 22 which is normally held open by a weighted bell-crank lever 23<a> pivoted at 24<b> and having a pawl end adapted to lock the ram mechanism. On the coke tube 5 reaching the position for discharge into the internal producer 2, a flexible connection 23<c> lifts the bell-crank lever 23<a> and the clutch 22 can then be thrown in to operate the ram 12. To prevent one end of the coke tube from being raised when the other end is also raised, e.g. to prevent the front end being raised when the position is that shown in Fig. 1 with resulting damage to the retort mouths, the safety device illustrated in Figs. 10 and 12 is provided. The clutches 57, 61 for the rear and front hoists respectively are connected so as to be operated by a single lever 54, and an operatively connected arm 68 is adapted to coact with safety masking- arms 66, 67. Each of these arms is maintained in the vertical position, clear of the arm 68, as shown in Fig. 12, by a projection near the corresponding end of the coke tube when such end is in its bottom position. When therefore the lever 54 is moved to clutch-in the hoist for one or other end of the coke tube, the corresponding masking- arm drops over to the left, thus preventing movement of the lever 54, through neutral position, to engage the other clutch. To prevent overwinding, each end of the coke tube runs in contact with a curved guide 76, 77, Fig. 1, near the top of which is mounted a spring-pressed nose adapted, on being engaged by the coke tube, to release a weighted lever, which then overbalances and operates a switch to stop the hoist motor. Safety catches are provided to arrest the coke tube in the event of breakage of the hoisting-gear- The coke tube is lined, entirely or at its lower part only, by means of slabs of fire-clay, glassslag, cast iron, &c. slid into place between parallel longitudinal bulb-section rails 52, Fig. 9, which stand slightly above the surface of the lining-slabs. To dispense with bridge-pieces between the coke tube and the retort mouths, the front end of the tube is made adjustable in position either by mounting the tube slidably in a cradle or by making its rear pivot bearing adjust able. In the former arrangement the cradle is provided with a hood at the rear end and comprises a bottom and sides each fitted with rollers to guide the tube, one or both sides of the cradle having also a number of locking-devices adapted to engage a projection on the tube to hold it in correct position for the particular retort under discharge. In a modification, two parallel coke tubes are employed. one, similar to that already described, being adapted to deal with the coke from the three lowest tiers of retorts, the other, adapted to take the coke from the upper tiers and discharge it on to a quenching-table, comprising a fixed rear part with a front part hinged thereto.