GB1082257A - Bracing device particularly suitable for use at the end of a face conveyor at a coal face where a coal plough is employed - Google Patents
Bracing device particularly suitable for use at the end of a face conveyor at a coal face where a coal plough is employedInfo
- Publication number
- GB1082257A GB1082257A GB3355364A GB3355364A GB1082257A GB 1082257 A GB1082257 A GB 1082257A GB 3355364 A GB3355364 A GB 3355364A GB 3355364 A GB3355364 A GB 3355364A GB 1082257 A GB1082257 A GB 1082257A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- driving medium
- conduit
- pressure
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000003245 coal Substances 0.000 title 2
- 238000005086 pumping Methods 0.000 abstract 3
- 101150058765 BACE1 gene Proteins 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/10—Anchorings for conveyors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
- E21D23/0065—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices driven, or automatically, e.g. electrically-hydraulically controlled
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Press Drives And Press Lines (AREA)
Abstract
1,082,257. Advancing mine face conveyers. H. BEUKENBERG, H. BEUKENBERG and K. BEUKENBERG, [trading as MASCHINENFABRIK GLœCKAUF GœNTHER KLERNER]. Aug. 17, 1964 [Aug. 17, 1963], No. 33553/64. Headings B8A and B8J. A bracing device for the end of a face conveyer, in which telescoping hydraulic props braceable between the floor and roof and preferably tiltable, is characterized in that a signal is given when the props are so far extended that, owing to insufficient roof contact, efficient bracing is impossible. As illustrated in Figs. 1, 2 (not shown) the bracing device is associated with a free conveyer (1) and comprises a counter support (2) with tiltable telescopic props (3), (8) each with hinged caps (9). The driving station of the conveyer (1) is connected with a slide guide (4) enclosing the counter support (2). The slide guide (4) with the counter support (2) and the conveyer (1) are alternately movable in the bace advancing direction while reciprocally guiding one another, by a double-acting hydraulically operated cylinder (5). A doubleacting hydraulic tensioning cylinder (6) is provided. Fig. 3 shows an inner prop 11 with a piston 12 having a collar 22 arranged to engage in a control chamber 23. When the inner prop 11 is extended driving medium displaced above the piston 12 escapes through a conduit 29. Prior to reaching the upper end position the control chamber 23 is closed by the collar 22 and driving medium trapped in the chamber 23 is forced through a conduit 24 to act upon a spring- loaded control piston 25 to open a shut-off member 26 and connect a compressed-air supply to a signal whistle 28. Instead of a compressed-air supply a cartridge of compressed gas may be pierced by a pointed extension on the piston (25) (Fig. 4, not shown). Figs. 5, 6 show a further embodiment in two different operating positions. In Fig. 5 driving medium from a pump is fed through a conduit 31 and a valve 38 to extend an inner prop 11 with a piston 12, driving medium above the piston 12 returning without pressure to the pumping unit through conduits 35, 36. When the inner prop 11 is fully extended (Fig. 6) the piston 12 lifts a control member 14 to open a back-pressure valve 33 to allow the driving medium to circulate freely through conduit 32 and control chamber 23 to conduits 35, 36 and thus back to the pumping unit. At the same time back-pressure valve 38 closes to prevent driving medium returning from below the piston 12. As a result a bracing pressure cannot be built up in the chamber below the piston 12 and a pressure gauge 39 indicates a considerable drop in pressure as a warning signal. The inner prop 11 may be retracted (Fig. 7, not shown) by applying driving medium to conduit 36 which closes a valve 34 and acts on a differential piston 37 to open the back-pressure valve 38. As a result the piston 12 is forced down, driving medium below the piston 12 returning to the pumping unit through the valve 38 and the conduit 31.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM57875A DE1244092B (en) | 1963-08-17 | 1963-08-17 | Safety device for the tensioning device of a face conveyor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1082257A true GB1082257A (en) | 1967-09-06 |
Family
ID=7309038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3355364A Expired GB1082257A (en) | 1963-08-17 | 1964-08-17 | Bracing device particularly suitable for use at the end of a face conveyor at a coal face where a coal plough is employed |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1244092B (en) |
GB (1) | GB1082257A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4226558A (en) * | 1979-02-16 | 1980-10-07 | Fletcher Sutcliffe Wild Limited | Control system |
CN109209504A (en) * | 2018-11-05 | 2019-01-15 | 郑州煤机液压电控有限公司 | Programmable host computer is automatically with machine method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109625844A (en) * | 2018-11-28 | 2019-04-16 | 中国神华能源股份有限公司 | Control System of Belt Conveyer and control method |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB640414A (en) * | 1948-03-06 | 1950-07-19 | Mavor & Coulson Ltd | Improvements in props |
-
1963
- 1963-08-17 DE DEM57875A patent/DE1244092B/en active Pending
-
1964
- 1964-08-17 GB GB3355364A patent/GB1082257A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4226558A (en) * | 1979-02-16 | 1980-10-07 | Fletcher Sutcliffe Wild Limited | Control system |
CN109209504A (en) * | 2018-11-05 | 2019-01-15 | 郑州煤机液压电控有限公司 | Programmable host computer is automatically with machine method |
CN109209504B (en) * | 2018-11-05 | 2020-03-24 | 郑州煤机液压电控有限公司 | Programmable automatic machine following method for upper computer |
Also Published As
Publication number | Publication date |
---|---|
DE1244092B (en) | 1967-07-13 |
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