GB968553A - Improvements in or relating to mine roof supports of the hydraulic type - Google Patents
Improvements in or relating to mine roof supports of the hydraulic typeInfo
- Publication number
- GB968553A GB968553A GB3889161A GB3889161A GB968553A GB 968553 A GB968553 A GB 968553A GB 3889161 A GB3889161 A GB 3889161A GB 3889161 A GB3889161 A GB 3889161A GB 968553 A GB968553 A GB 968553A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- pressure
- spring
- outlet
- casing
- 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 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
- E21D15/58—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
-
- 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
- E21D23/0069—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 without essential advancing shifting 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)
- Structural Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Safety Valves (AREA)
Abstract
968,553. Valves. A. G. WILD & CO. Ltd. Jan. 30, 1963 [Oct. 31, 1961], No. 38891/61. Heading F2V. A valve for controlling the supply of fluid to a mine roof support comprises a casing 13 with an inlet 14 and outlet 15, a valve seat 16, a valve 11 slidably mounted in the casing to and away from the seat, the valve being spring biased towards the open position and movable into a closed position by hydraulic pressure in the outlet when this pressure overcomes the spring pressure, and a member 21 which retains the valve in the closed position and which can be actuated manually to allow the valve to re-open. The member 21 consists of a spring-loaded cam which follows up the closing movement of the valve under increasing pressure at the outlet 15 and may be rotated by a lever 22 to permit the valve be opened again by its spring after the pressure in the roof support has been released. To vary the pressure required to close the valve, the spring may be changed or be arranged to abut an adjustable stop. The valve may be mounted in the same casing as a pressure relief valve operated by a cam on the same shaft as the cam 21 so that when the relief valve is closed the valve 11 is free to open. Specification 781,297 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3889161A GB968553A (en) | 1961-10-31 | 1961-10-31 | Improvements in or relating to mine roof supports of the hydraulic type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3889161A GB968553A (en) | 1961-10-31 | 1961-10-31 | Improvements in or relating to mine roof supports of the hydraulic type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB968553A true GB968553A (en) | 1964-09-02 |
Family
ID=10406308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3889161A Expired GB968553A (en) | 1961-10-31 | 1961-10-31 | Improvements in or relating to mine roof supports of the hydraulic type |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB968553A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410548A (en) * | 2013-05-22 | 2013-11-27 | 三一重型装备有限公司 | Hydraulic support and water spraying valve thereof |
-
1961
- 1961-10-31 GB GB3889161A patent/GB968553A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410548A (en) * | 2013-05-22 | 2013-11-27 | 三一重型装备有限公司 | Hydraulic support and water spraying valve thereof |
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