GB836665A - Improvements in or relating to hydraulic pit props - Google Patents
Improvements in or relating to hydraulic pit propsInfo
- Publication number
- GB836665A GB836665A GB3686557A GB3686557A GB836665A GB 836665 A GB836665 A GB 836665A GB 3686557 A GB3686557 A GB 3686557A GB 3686557 A GB3686557 A GB 3686557A GB 836665 A GB836665 A GB 836665A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- pressure
- prop
- valve
- relating
- 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
- 239000012530 fluid Substances 0.000 abstract 3
- 230000036316 preload Effects 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
- E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/58—Devices for setting props or chocks
- E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
- E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Reciprocating Pumps (AREA)
Abstract
836,665. Mine roof supports. MANNESMANN A.G. Nov. 26, 1957 [Nov. 26, 1956], No. 36865/57. Class 20(2) The ram 2 of a hydraulic pit prop is extended by operating a valve 6 to introduce compressed air from a cylinder P, firstly at a low pressure (via a pipe 7) into a hydraulic fluid storage chamber HV so as to expel fluid therefrom into a second chamber ZV via a non return valve 3 and simultaneously therefrom into a pressure chamber D via a non return valve 4; secondly at a higher pressure (via a pipe 8) into the chamber ZV to expel fluid to preload the prop. The prop is lowered by connecting the pressure chamber D with the storage chamber HV (via pipes 9 and 7). Compressed air is released through an orifice 10. Pressure gauges and an excess pressure valve are provided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM32482A DE1024911B (en) | 1956-11-26 | 1956-11-26 | Method for operating pneumatic-hydraulic pit rams |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB836665A true GB836665A (en) | 1960-06-09 |
Family
ID=7301496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3686557A Expired GB836665A (en) | 1956-11-26 | 1957-11-26 | Improvements in or relating to hydraulic pit props |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1024911B (en) |
| FR (1) | FR1186730A (en) |
| GB (1) | GB836665A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924991A (en) * | 2014-03-07 | 2014-07-16 | 浙江衢州煤矿机械总厂股份有限公司 | Mining inner-injection type individual hydraulic prop |
| CN105507942A (en) * | 2015-12-29 | 2016-04-20 | 大同煤矿集团有限责任公司 | Underground quick supporting equipment set |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995034743A1 (en) * | 1994-06-13 | 1995-12-21 | Contitech Luftfedersysteme Gmbh | Mine prop |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE828836C (en) * | 1949-07-14 | 1952-01-21 | Gutehoffnungshuette Oberhausen | Hydraulic or pneumatic-hydraulic pit ram |
| DE934342C (en) * | 1954-06-27 | 1955-10-20 | Gutehoffnungshuette Sterkrade | Multi-part hydraulic pit ram |
-
1956
- 1956-11-26 DE DEM32482A patent/DE1024911B/en active Pending
-
1957
- 1957-11-25 FR FR1186730D patent/FR1186730A/en not_active Expired
- 1957-11-26 GB GB3686557A patent/GB836665A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924991A (en) * | 2014-03-07 | 2014-07-16 | 浙江衢州煤矿机械总厂股份有限公司 | Mining inner-injection type individual hydraulic prop |
| CN103924991B (en) * | 2014-03-07 | 2015-12-02 | 浙江衢州煤矿机械总厂股份有限公司 | Mining internal-injection type hydraulic prop |
| CN105507942A (en) * | 2015-12-29 | 2016-04-20 | 大同煤矿集团有限责任公司 | Underground quick supporting equipment set |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1024911B (en) | 1958-02-27 |
| FR1186730A (en) | 1959-08-31 |
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