Coal pipe monitor

Details Coal pipe monitor Coal pipe monitor

1980-01-28

1982-02-02

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

222 23, 250575, 250357, 250359, 340516, 340606, 340608, 340617, G08B 2100

Patent

active

043142419

ABSTRACT:
Method and apparatus for monitoring the flow of coal from a bunker through a conduit to a coal feeder. A radiation sensitive detector detects the amount of coal present at a zone of the conduit and generates a stream of pulses which is sampled at discrete sample intervals of time to determine whether the conduit zone is empty, partially filled or filled. If the conduit zone is partially filled, a partial alarm is generated, and a determination is made as to whether the conduit zone is empty. If the conduit zone is empty, an empty alarm is generated and the feeder is stopped after a predetermined amount of coal has been deposited on the feeder. If the conduit zone is partially filled and a shut-off valve between the bunker and conduit is closed, a coal build-up alarm is generated. If the conduit zone is filled and the profile of coal at the feeder is not at full profile, a coal hang-up alarm is generated. If the conduit zone is partially filled and the profile of coal at the feeder is at full profile, a vent alarm is generated. A self-testing circuit periodically simulates each of these conditions.

REFERENCES:
patent: 2654879 (1953-10-01), Jackson
patent: 3050018 (1962-08-01), Pearson
patent: 3064357 (1962-11-01), Butters
patent: 3278747 (1966-10-01), Ohmart
patent: 3280328 (1966-10-01), Gieskieng
patent: 3577158 (1971-05-01), Hahn
patent: 3582647 (1971-06-01), Figuet
patent: 3582647 (1971-06-01), Figuet et al.
patent: 3594788 (1971-07-01), Seelig
patent: 3612876 (1971-10-01), Grant
patent: 3678268 (1972-07-01), Reim et al.
patent: 3763380 (1973-10-01), Homer et al.
patent: 4210809 (1980-07-01), Pelavin

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