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US 4,721,425 AGranted
Apparatus for conveying bulk material in silos
AssigneeGustav Schade Maschinenfabrik GmbH & Co.
InventorGunter Strocker
Life of this patent
Estimating the term…
Abstract
The invention relates to an apparatus for supplying a silo with bulk material and for discharging the bulk material from the silo, using a clearing unit which can be raised and lowered in the silo, and which at the same time is mounted pivotably about the silo axis. In the silo a draw-off shaft is in the form of a telescopic gravity-descent tube, via which the bulk material removed by the clearing unit is conveyed out of the silo. In this invention the clearing unit is connected via a bearing to a bridge girder which extends transversely across through the silo and which at its ends is guided in vertical guides on the silo wall. The operating forces are transmitted to the silo wall via the bridge girder.
Claims20
In an apparatus for conveying bulk material in a silo with a vertical axis, comprising
- feed means for dumping bulk material introduced into the silo, and discharge means for discharging bulk material from the silo, which discharge means comprises clearing means for removing material from the top surface of bulk material within the silo, and which is movable vertically and rotatably within the silo, and a gravity-descent tube in the silo, which tube has top and bottom ends defining a bulk material inlet at the top end thereof, to receive material from the clearing means, is telescopic and is coupled to the clearing means so as to follow vertical movement of the clearing means,
- the improvement comprising:
- a bridge girder having at least two ends adjacent the silo walls, and extending horizontally across the silo,
- vertical guides on the silo wall, engaging said ends of said bridge girder, thereby constraining said girder against rotation,
- lifting means to raise and lower said girder, in said silo,
- a rotary joint supporting said clearing means from and beneath said briidge girder, for said clearing means to move vertically with said bridge girder, and pivot around the vertical axis of the silo,
- drive means associates with said rotary joint for rotating said clearing means relative to said bridge girder,
- a feed conveyor at the top of the silo, distributor means carried by said bridge girder to dump incoming bulk material, and a telescopic feed tube having top and bottom ends and arranged to receive incoming material discharging from said feed conveyor, the said tube descending to said bridge girder and having its lower end connected to said bridge girder whereby said tube telescopically retracts and extends to follow vertical movement of said distributor means as carried by said bridge girder.
5 more elements
In an apparatus for conveying bulk material in a silo with a vertical axis, comprising:
- feed means for dumping bulk material introduced into the silo, and discharge means for discharging bulk material from the silo, which discharge means comprises clearing means for removing material from the top surface of bulk material within the silo, and which is movable vertically and rotatably within the silo, and a gravity-descent tube in the silo, which tube has top and bottom ends which defines a bulk material inlet at the top end thereof, to receive material from the clearing means, is telescopic and is coupled to the clearing means so as to follow vertical movement of the clearing means,
- the improvement comprising:
- a bridge girder having at least two ends adjacent the silo walls, and extending across the silo,
- vertical guides on the silo wall, engaging said ends of said bridge girder, thereby constraining said girder against rotation,
- lifting means to raise and lower said girder, in said silo,
- a rotary member;
- a rotary girder supporting said rotary member from and beneath said bridge girder to be rotatable about said axis and to move vertically with said bridge girder;
- said clearing means comprising at least one scraper boom having driven scraper chain means for scraping said bulk material longitudinally of said boom, said boom extending from said rotary member and being connected thereto to move vertically and to rotate about said axis with said rotary member, and to pivot with respect to said rotary member in a vertical plane;
- said feed means comprising
- distributor means adapted to dump incoming bulk material and comprising a conveyor connected to said rotary member at a pivotal connection vertically above said scraper boom, said conveyor extending diametrically away from said rotary member with a first extending portion connected to said scraper boom by and adjustable coupling, and a second extending portion acting as a pivotal counterweight to said scraper boom;
- stop means responsive to pivotal movement of said scraper boom in said vertical plane, said stop means comprising a stop member associated with said second extending portion of said conveyor, a counter-stop member associated with said rotary member, said stop member being adapted to contact said counter-stop member when said scraper boom is not pivoted, and to be carried out of contact with said counter-stop member by said second extending portion when said scraper boom is pivoted to a predetermined angle, and detecting means adapted to generate a signal when said stop means is out of contact with said counter-stop means,
- drive means for rotating said clearing means and said distributor means relative to said bridge girder through said rotary member;
- a feed conveyor at the top of the silo;
- and,
- a telescopic feed tube having top and bottom ends and arranged to receive incoming material discharging from the feed conveyor, the said tube descending to the bridge girder and having its lower end connected to the bridge girder.
12 more elements
Dependencies are inferred from the claim text.