GB1524839A - Drilling boom assembly - Google Patents
Drilling boom assemblyInfo
- Publication number
- GB1524839A GB1524839A GB3765075A GB3765075A GB1524839A GB 1524839 A GB1524839 A GB 1524839A GB 3765075 A GB3765075 A GB 3765075A GB 3765075 A GB3765075 A GB 3765075A GB 1524839 A GB1524839 A GB 1524839A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder
- duct
- boom
- plunger
- rod
- 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
- 238000005553 drilling Methods 0.000 title 1
- 239000012530 fluid Substances 0.000 abstract 5
- 230000007246 mechanism Effects 0.000 abstract 3
- 239000011435 rock Substances 0.000 abstract 3
- 238000010276 construction Methods 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/025—Rock drills, i.e. jumbo drills
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/022—Control of the drilling operation; Hydraulic or pneumatic means for activation or operation
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
1524839 Drill mounting boom GOSUDARSTVEN PROEKT-KONSTRUKTOR I EXPERIMENTAL INST PO OBOGATITEL NOMU OBORUDOVANIJU "GIPROMASHOBOGASCHENIE" 12 Sept 1975 37650/75 Heading B4C [Also in Division B3] A rock drill boom assembly, Fig. 1, comprises a boom 1 longitudinally extensible by hydraulic cylinder 8 and pivotable in a horizontal plane on column 2 by cylinder 14, Fig. 3, and in a vertical plane by a cylinder 12, and a feed bar 4 pivotably mounted on the end of the boom for movement in a vertical plane by cylinder 9 and in a horizontal plane by cylinder 10. The feed bar carries a "drifter", or rock drill 5 and is movable axially by a cylinder 6 and can be turned about an axis O 2 O 3 , parallel to its own axis, by mechanism 11. To prevent the working end of the feed bar moving away from the rock face (or, more accurately, from a vertical plane) - in use when either (i) the boom is pivoted vertically by cylinder 12 or (ii) pivoted horizontally by cylinder 14, the boom assembly is provided either with (i) a servomechanism 15 for controlling the operation of the boom-extending cylinder 8 or (ii) a servomechanism 17, Fig. 3, for controlling the operation of feed bar-displacing cylinder 6. As shown, the assembly has both mechanisms. The mechanisms are similar in construction and operation, the one, 15, comprising a rod 133, Fig. 8 a hydraulic cylinder 90 mounted slidably on the rod and a servovalve 95 also slidable on the rod, the chambers "h" and "i" of the cylinder 90 communicating respectively with those "f" and "g" of the controlled cylinder 8, Fig. 10 (and Fig. 6, not shown). The servovalve 95 has a body 94 fixed to the piston rod 93 of cylinder 90, and a plunger 132 attached to the rod 133, as shown in Fig. 9, via springs 140, 141 rods 146, 147 and washers 142, 143 engaging abutments on the plunger and bushing 145 which connects rods 146, 147. The plunger allows or prevents communication between fluid supply duct 138 and duct 134 leading to chamber "h" and duct 135 leading to chamber "f" and between ducts 134, 135 and return ducts 136, 137 the relative position of the plunger and body 94 is determined by a connecting linkage 16 connecting body 91 of cylinder 90 to the bearing plate 3 for column 2. The "linkage" 18 of servomechanism 17 connects cylinder 152 to column 2. Cylinder 12 (Fig. 7, not shown) includes a pilot cylinder (52) having chambers in communication with those of cylinder 9 such that "hydraulic parallelism" is ensured (to keep feed bar 4 horizontal). In operation, boom 1 is tilted vertically upwardly by feeding fluid to cylinder 12 by means of distributor 159, Fig. 10. Distributor 163 is operated to feed fluid to duct 138. By virtue of "linkage" 16 cylinder 90 and body 94 move to the right relative to plunger 132 and fluid flows from duct 138 to duct 135 and to chamber "f" to extend cylinder 8. At the same time chamber "h" of cylinder 90 communicates via duct 134 with duct 136 and return line 161. As cylinder 8 extends fluid expelled from "g" flows to "i" in cylinder 90 along line 160 to displace rod 93 to move valve body 94 relative to the plunger 132 which then closes duct 138. The boom may be extended at will and not automatically by disengaging distributor 163 and using distributor 162. A similar operation occurs with the other servomechanism 17.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3765075A GB1524839A (en) | 1975-09-12 | 1975-09-12 | Drilling boom assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3765075A GB1524839A (en) | 1975-09-12 | 1975-09-12 | Drilling boom assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1524839A true GB1524839A (en) | 1978-09-13 |
Family
ID=10397991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3765075A Expired GB1524839A (en) | 1975-09-12 | 1975-09-12 | Drilling boom assembly |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1524839A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2156714A (en) * | 1984-02-15 | 1985-10-16 | Boart | Drilling boom |
-
1975
- 1975-09-12 GB GB3765075A patent/GB1524839A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2156714A (en) * | 1984-02-15 | 1985-10-16 | Boart | Drilling boom |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1325240A (en) | Portable rock drill | |
US2803444A (en) | Mine roof support systems | |
GB651280A (en) | Improvements in or relating to tracer head mechanisms for copy milling machines | |
GB565861A (en) | Sand molding machines | |
ES364614A1 (en) | Drill boom structure | |
GB723871A (en) | Fluid pressure power mechanisms | |
GB1524839A (en) | Drilling boom assembly | |
US3478522A (en) | Control arrangements for hydraulic pit prop support units | |
US2895715A (en) | Drilling and similar machines | |
US3306374A (en) | Polar positioning device for rock drills | |
US3085638A (en) | Rock drilling mechanisms | |
GB1236460A (en) | Improvements in drill boom arrangement with parallel motion linkage means | |
GB1016061A (en) | Mine roof support | |
US2565600A (en) | Hydraulic control mechanism for machine tools | |
GB936787A (en) | Tracer control circuit for machine tools | |
GB1299207A (en) | Improvements in or relating to earth-markers | |
GB888286A (en) | Improvements in or relating to the control of implements by mechanically propelled vehicle | |
ATE10871T1 (en) | IMPACT AND DRILL DEVICE. | |
GB731528A (en) | Improvements in or relating to drilling machines | |
US4073150A (en) | Suspended valve control device | |
GB830643A (en) | Improvements in or relating to drill attachments | |
CA1043767A (en) | Drilling boom | |
GB1313294A (en) | Movement control apparatus | |
US3709097A (en) | Drilling support for a rock perforator | |
GB1301563A (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |