GB1065641A - Devices for tensioning haulage chains of mining machines - Google Patents
Devices for tensioning haulage chains of mining machinesInfo
- Publication number
- GB1065641A GB1065641A GB1298363A GB1298363A GB1065641A GB 1065641 A GB1065641 A GB 1065641A GB 1298363 A GB1298363 A GB 1298363A GB 1298363 A GB1298363 A GB 1298363A GB 1065641 A GB1065641 A GB 1065641A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chain
- tension
- cylinder
- piston
- tensioner
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
- E21C29/04—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains
- E21C29/14—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains by haulage cable or chain pulling the machine along the working face
- E21C29/145—Means for tensioning the haulage chains or cables
Abstract
1,065,641. Hauling. COAL INDUSTRY (PATENTS) Ltd. July 2, 1964 [April 2, 1963]. No. 12983/63. Heading B8B. A tensioner for a haulage chain 13 of a mining machine comprises a device for giving the chain an initial tension and a device for limiting the maximum chain tension, the latter comprising an hydraulic piston and cylinder arrangement 25 having either the piston or cylinder anchored and whichever is not anchored is adapted to be secured to the chain 13, hydraulic fluid being discharged from the cylinder when the piston moves due to the chain tension reaching its maximum value. A pressure relief valve 18 coupled to the fluid supply line permits fluid discharge from the cylinder at the limiting tension. In the embodiment of Fig. 4 the chain 13 is coupled through an initial tensioner 27 to a flexible linkage 22 which is coupled to the maximum limit tensioner 25. The initial tensioner 27 comprises a plurality of compression springs 28 attached to plates 29, 30 at their ends, the end of the chain passing between the springs and being attached to the plate 30 which is movable under load to compress the springs 28 within the framework 31. When the springs are fully compressed, the device 27 is moved with further chain tensioning and this loads up the maximum limit tensioner 25 via linkage 22 until the tension is relieved by the valve 18 whereupon the springs 28 re-expand. In the embodiment of Fig. 1 (not shown) the chain 13 is coupled directly to the piston-rod of a piston and cylinder assembly. The initial tension is applied to the chain by pressurizing the cylinder and when this pressurized fluid reaches the pressure representing maximum limiting chain tension the relief valve operates to reduce the tension. In the embodiment of Fig. 2 (not shown) the initial tension is applied by an hydraulic piston having a pulley on its outermost end around which a flexible linkage from the chain, passes to a pair of piston and cylinder devices arranged in parallel to act as the maximum limit tensioner.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1298363A GB1065641A (en) | 1963-04-02 | 1963-04-02 | Devices for tensioning haulage chains of mining machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1298363A GB1065641A (en) | 1963-04-02 | 1963-04-02 | Devices for tensioning haulage chains of mining machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1065641A true GB1065641A (en) | 1967-04-19 |
Family
ID=10014683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1298363A Expired GB1065641A (en) | 1963-04-02 | 1963-04-02 | Devices for tensioning haulage chains of mining machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1065641A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014075806A2 (en) * | 2012-11-16 | 2014-05-22 | Caterpillar Global Mining Europe Gmbh | Extraction installation for mineral extraction |
-
1963
- 1963-04-02 GB GB1298363A patent/GB1065641A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014075806A2 (en) * | 2012-11-16 | 2014-05-22 | Caterpillar Global Mining Europe Gmbh | Extraction installation for mineral extraction |
WO2014075806A3 (en) * | 2012-11-16 | 2014-09-12 | Caterpillar Global Mining Europe Gmbh | Extraction installation for mineral extraction |
CN104769218A (en) * | 2012-11-16 | 2015-07-08 | 卡特彼勒环球矿业欧洲有限公司 | Extraction installation for mineral extraction |
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