EP2147191A2 - Hydraulic ram comprising thin-walled exterior and interior pipes - Google Patents
Hydraulic ram comprising thin-walled exterior and interior pipesInfo
- Publication number
- EP2147191A2 EP2147191A2 EP08734477A EP08734477A EP2147191A2 EP 2147191 A2 EP2147191 A2 EP 2147191A2 EP 08734477 A EP08734477 A EP 08734477A EP 08734477 A EP08734477 A EP 08734477A EP 2147191 A2 EP2147191 A2 EP 2147191A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic ram
- ram according
- wire
- hydraulic
- outer tube
- 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.)
- Granted
Links
- 229910000639 Spring steel Inorganic materials 0.000 claims abstract description 19
- 230000007704 transition Effects 0.000 claims abstract description 9
- 238000005065 mining Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 11
- 239000004809 Teflon Substances 0.000 claims description 8
- 229920006362 Teflon® Polymers 0.000 claims description 8
- 230000005641 tunneling Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 2
- 101100521345 Mus musculus Prop1 gene Proteins 0.000 abstract 2
- 108700017836 Prophet of Pit-1 Proteins 0.000 abstract 2
- 230000008569 process Effects 0.000 description 7
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 241001669679 Eleotris Species 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 244000063498 Spondias mombin Species 0.000 description 1
- 235000015127 Spondias tuberosa Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002569 water oil cream Substances 0.000 description 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/32—Articulated members
- Y10T403/32254—Lockable at fixed position
- Y10T403/32467—Telescoping members
- Y10T403/32475—Telescoping members having detent
- Y10T403/32491—Threaded
Definitions
- the invention relates to a hydraulic ram for use in underground mining and tunneling with an outer tube end workedempractican gleichteil and attached to the opposite end of the tube handle and a displaceable in the outer tube inner tube with end-side top plate and associated filling / robbery valve, pressure relief valve and insertable in connecting grooves security wires for Outer tube, foot connection part and handle as well as inner tube and top plate.
- Such hydraulic rams are used both as a single stamp as well as in Ausbauugestellen and Schildausbaugestellen. To actuate the cylinder they are acted upon by a hydraulic fluid, which may be oil, water, water in oil, plasma or other liquid or air.
- a hydraulic fluid which may be oil, water, water in oil, plasma or other liquid or air.
- water-oil emulsion is first compressed in a high-pressure pump and then fed via hose or similar lines the hydraulic ram or the cylinder.
- the extension and retraction of the hydraulic ram is controlled, being always worked with one and the same pressure, namely the dependent of the performance of the high-pressure pump pressure, today usually around 360 bar.
- a higher pressure level is desired.
- fuse wires are preformed, made of spring steel round wires, which have a smaller diameter than conventional locking wires and yet can transmit high forces up to about 40 1.
- two such security wires are used in the particularly loaded connection areas, namely between the outer tube and base plate and the inner tube and top plate in this prior art, thereby the forces to be absorbed or absorbed are not significantly higher.
- the invention is therefore based on the object to provide a suitable for the highest pressure range, thin-walled and thus easy to handle hydraulic ram, which is thus also used with a set pressure of about 600 1.
- the fuse wires are designed as rectangular wire anchors, preferably made of spring steel, which can be stored in a width corresponding to the "Federstahldrahtankem" connecting groove and from this in the transition region and thus in the opposite trained and in the width corresponding connecting groove displaceable and where the pipe parts are designed to connect together.
- the securing wire receiving connection groove is formed in the top plate or in the handle and the predominantlyan gleichteil and the oppositely formed connecting groove is assigned to the outer tube or the inner tube.
- the relatively stiff spring steel wire anchor or the corresponding fuse wire in the connecting groove, for example in the top plate, in the handle or in redesignan gleichteil and then insert the outer tube or inner tube accordingly.
- the safety wire is now from the outside to influence so that it partially pushes into the connecting groove in the outer tube or inner tube, so bridged the transition region between the two grooves and the connection is made effectively. It is understood that the fuse wire is fixed in this transitional area, to which further explanations follow later.
- the invention provides that the securing wire receiving connecting groove has a securing wire completely receiving depth, while the opposite connecting groove is designed with an approximately 50% of the security wire thickness corresponding depth.
- the fuse wire can thus be pushed as described only limited in the opposite connection groove so that it remains with the other half in the original groove, so that the connection described between the two components is guaranteed. Too much displacement of the fuse wire is thus effectively prevented.
- the invention provides that the screws on the opposite end of the support surface have an Allen.
- the set screw can be completely turned into the corresponding hole and used to effectively push the safety wire into the connecting position.
- the rotation process or, more precisely, the displacement process is facilitated by the fact that the support surface of the screws is slightly curved outward, so that when screwing the screws advantageously reduced friction occurs.
- the spring steel wire anchor receiving connecting groove and the opposite connecting groove have a corresponding width, so that the movement of the spring steel wire anchor or the fuse wires can be done easily, which is still optimized according to the invention in that the security wires rounded Have edges. It is actually sufficient if the edges are rounded, which face the opposite connecting groove, because only these have to move into this connection groove, but automatically slide into the receiving connection groove when relieving.
- a method and a corresponding cylinder is known, via which the described pressure increases are possible.
- a so-called packer is integrated into the hydraulic ram, for which the invention provides that the head plate is associated with a so-called packer consisting of a displaceably arranged in the piston rod tensioning piston with insertable into the cylinder chamber clamping piston rod, wherein the clamping piston the pressure fluid in the cylinder chamber is once again highly compressible.
- the top plate is to be designed accordingly to safely receive the so-called packer and also provided with the necessary connections to move the clamping piston or the clamping piston rod so that in the cylinder chamber, a substantially increased pressure.
- the pressure fluid is already applied during the normal setting process with the known 360 or 400 bar, so that appropriate set pressures are achieved. These are then brought into the further described amount of about 600 1 by the clamping piston rod is pressed into the cylinder chamber, so as to further tension the hydraulic fluid.
- the invention provides that the outer tube is associated with a switching device with pressure relief valve via a releasable clamp.
- This design has the advantage that movements and influences of the connecting pipes on the outer tube remain harmless to the fixation of the switching device.
- the detachable clamp allows a limited movement easily, without causing damage.
- the clamp has two half-shells which can be connected to one another via screws and on which the housing of the switching device and possibly a second one provided for safety. Pressure relief valve is welded.
- the switching device in particular the connecting parts to the pressure relief valves can thus "move" limited to the outer tube, damage can not occur and also the welds between housing or other components and the half shells are completely unaffected by vibrations occurring the components are so securely connected to the non-weldable tubes made of high strength steel.
- the switching device associated pressure relief valve on the input side has a flow regulator.
- This flow regulator ensures that, when the pressure limiting valve responds, it remains free of vibration due to the pressure fluid flowing through it, which has a positive effect on the components of the pressure limiting valve. Damage in or on the pressure relief valve and on the hydraulic ram does not occur.
- the two tube ends of the inner tube is associated with a wide Teflon ring arranged in a Breitnut.
- a Teflon ring or the wide groove can have a length of 10 mm and more and contribute significantly to the fact that keijie friction losses occur when pushing out the inner tube from the outer tube as well as when reinserting, at the same time also seal these Teflon rings advantageous in addition.
- the invention is characterized in particular by the fact that a hydraulic ram has been created, which can be used as a single stamp, but above all in the shield, the items are welded together without welding and with a technique that works well and thus for The rough operation underground is ideally suited.
- the hydraulic punches can be used due to the described connection technology with extremely high setting pressure and up to 6001 and thus for the first time fully meet the high demands in today's mining and tunneling underground.
- the hydraulic rams consist of the inner and outer tubes as well as the connecting parts to the horizontal sleeper and to the hang-end cap of, for example, a walking frame. All parts are effectively connected as described only on the safety wires special design without these connections could be affected by the high pressures and loads.
- FIG. 3 shows the connection region to the horizontal threshold in enlarged reproduction
- Figure 4 is a cross section through the hydraulic ram in
- Figure 5 is an enlarged view of the transition region between the connecting grooves in the components to be connected, left in the starting position and right in the connecting position and
- a used in underground mining and tunneling hydraulic ram 1 is shown in Figure 1. It is part of the hydraulic expansion 2, here a shield construction, which is used in the strut 3 to support the hanging wall 4 and 5 lying against each other and so to keep the created cavity open.
- the Hangendkappe 6 is also formed in several parts, such as the horizontal sleeper 7, wherein in the horizontal sleeper 7, a push cylinder 9 is housed, over which the longwall conveyor 8 can be moved in the direction of coal blast 10. Behind the shield removal of the break falls 11 and closes the cavity created again, the breaker plate 12 is employed and supported so that both during the extended hydraulic ram 1 as well as the retracted hydraulic ram 1 always enough security in the longwall 3 is guaranteed.
- Figure 2 shows a longitudinal section through the hydraulic ram 1, wherein the outer tube is denoted by 15 and the inner tube 19.
- the outer tube 15 with the contemplatan gleichteil 16 rests in the horizontal sleeper 7, not shown here, while the handle 17 forms the upper end portion of the outer tube 15.
- the actual handle can be dispensed with
- corresponding ring 18 is absolutely necessary, which simultaneously represents a insertion limit for the inner tube 19.
- annular space 14 Between outer tube 15 and inner tube 19 remains an annular space 14, which is needed to support the insertion of the inner tube 19. Further details will be explained later.
- the inner tube 19 is open at the tube end 74 with respect to the outer tube 15, so that when filling hydraulic fluid via the filling / predamper valve 21 or the switching device 24 into the cylinder chamber 80, the inner tube 19 is pushed out of the outer tube 15.
- the hanging end cap 6 is pressed against the hanging wall 4.
- the corresponding pressure then builds up in the cylinder space 80, which in the embodiment shown here can be built up to a set pressure of up to approximately 600 t.
- the cylinder chamber 80 is closed at the top by the top plate 20, which is fixed to the pipe end 73 of the inner tube 19. Further explanations will be given below.
- the filling and also relieving takes place via the switching device 24, in which case additionally a pressure limiting valve 22 with a flow regulator 26 is provided. If, due to an overload in the cylinder chamber 80, the pressure there is too high, this pressure relief valve 22 opens without the vibrations possibly occurring through the connecting pipe 28 being able to have a disadvantageous effect. This prevents the described flow regulator 26.
- the switching device 24 and the pressure relief valve 22 are connected via a connecting pipe 28 with the cylinder chamber 80, said connecting pipe 28 via brackets 27, 27 'is easy and safe to connect.
- a safety pressure relief valve 23 is shown, which is not absolutely necessary, but can be used for safety reasons.
- Both this safety pressure limiting valve 23 and the housing 65 of the switching device 24 are fixed via a detachable clamp 25 on the outer tube 15.
- the cylinder chamber 80 is filled with hydraulic fluid. If the inner tube 19 is then retracted later, so the hydraulic ram 1 5 are relieved, this movement is by applying the
- the pressure fluid then acts on the piston 29 of the inner tube 19 and ensures a rapid retraction of the inner tube 19th
- Safety wires 30, 31, 32 used. All fuse wires 30, 31, 32 are formed as rectangular spring steel wire anchors 35. They sit in connecting grooves 36, 37, 38 and can be inserted via adjusting screws 48, 49, 50, 51 in the opposite connecting grooves 39, 40, 41, so
- the fuse wire 30 is seated in the connecting groove 38 and 41.
- the fuse wire 31 is seated in the connecting groove 37 and 40, the fuse wire 32nd
- a tensioning piston 78 is housed in the region of the 0 head plate 20, which with his
- Clamping piston rod 79 in the piston rod 77 can be moved or displaced.
- the clamping piston rod 79 is thereby pushed into the cylinder space 80, so as to increase the pressure.
- 81 designates the tensioning piston connection, via which pressure fluid can thus be pushed into the area above the tensioning piston 78.
- FIG. 3 shows an enlarged representation of the foot connection part 16 inserted into the lying threshold 7.
- the safety wire 30 has been brought into a position which allows it to extend in part into the connection groove 40 and the connection groove 38. It thus bridges the transition region 42 and ensures that here the Robinsonrohrum charged 45 is effectively connected to the outer tube 15.
- 34 test ports are designated here, via which the pressure conditions in the cylinder chamber 80 can be checked and monitored.
- a Teflon ring 75 is shown, which rests in a wide groove 76. This wide Teflon ring 75 ensures that no friction losses occur.
- An identically formed Teflon ring is also reproduced at the pipe end 73 and also designated there by 75.
- a sealing ring 70 is arranged above this Teflon ring 75 in the Breitnut 76, which is fixed on both sides by a support ring 71, 71 '.
- FIG. 4 shows a section showing both the outer tube surround 46 and the outer tube 15 and the inner tube 19. Fixed or connected here are the outer tube 15 and the réellerohrum charged 46 of the handle 17.
- the two components interconnecting fuse wire 31 has been here from the fuse wire 31 receiving groove 37 partially pushed into the groove 40 and that via the screws 48, 49, 50 and 51. These screws 48 - 51 influence the fuse wire 31 evenly, it is expedient to start with the adjusting screw 48. Finally, then the tightened set screws 49, 50 rotated from its outer position into the fixing position, where they then fix the fuse wire ends 53, 54.
- FIG. 5 shows on the left the starting position of the spring steel wire anchor 35, wherein the adjusting screw 48 or 49 or 50 or 51 is in a position which ensures that the locking wire 30, 31, 32 and the spring steel wire anchor 35 when inserting, for example, the outer tube 15 in the handle 17 is not an obstacle. He lies fully in him receiving connecting groove 37.
- the adjusting screw 48, 49, 50, 51 is pushed via the Imbus 57 at the opposite end of the support surface 55 from the connecting groove 37 in the connecting groove 40 in such a way that it then completely fills, but in the Transition region 42 still protrudes into the remaining opening of the connecting groove 37. In this way, both components are effectively interconnected.
- the support surface 55 is slightly bent outwardly toward the spring steel wire anchor 35 and the edges 58 of the spring steel wire anchor 35 are slightly rounded so as to facilitate and secure insertion into the connection groove 40.
- FIG. 6 shows the connection of the switching device 24 or the pressure-limiting valves 22, 23 with the outer tube 15 through the connecting pipes 28 to make any possible vibrations on this determination on the outer tube 15 harmless, these components are connected via a releasable clamp 25 together. It also supports the use of non-weldable high-strength pipes.
- This detachable clamp 25 consists of two half-shells 62, 63, which are to be connected by screws 64 together.
- the housing 65 or the pressure relief valve 22, 23 are defined by welds 66, 67 on this releasable clamp 25, so that occurring movements and the like can not affect the connection with the outer tube 15.
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)
- Actuator (AREA)
- Package Frames And Binding Bands (AREA)
- Materials For Medical Uses (AREA)
- Reinforcement Elements For Buildings (AREA)
- Soil Working Implements (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Supports For Pipes And Cables (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL08734477T PL2147191T3 (en) | 2007-04-17 | 2008-04-09 | Hydraulic ram comprising square-section locking wires |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007018021A DE102007018021A1 (en) | 2007-04-17 | 2007-04-17 | Hydraulic punches with thin-walled outer and inner tubes |
PCT/DE2008/000598 WO2008125082A2 (en) | 2007-04-17 | 2008-04-09 | Hydraulic ram comprising thin-walled exterior and interior pipes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2147191A2 true EP2147191A2 (en) | 2010-01-27 |
EP2147191B1 EP2147191B1 (en) | 2010-07-14 |
Family
ID=39767791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08734477A Not-in-force EP2147191B1 (en) | 2007-04-17 | 2008-04-09 | Hydraulic ram comprising square-section locking wires |
Country Status (7)
Country | Link |
---|---|
US (1) | US8297888B2 (en) |
EP (1) | EP2147191B1 (en) |
AT (1) | ATE474126T1 (en) |
AU (1) | AU2008238408B2 (en) |
DE (2) | DE102007018021A1 (en) |
PL (1) | PL2147191T3 (en) |
WO (1) | WO2008125082A2 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101944299B (en) * | 2010-07-30 | 2011-11-02 | 巩亚东 | Virtual construction system of full-face tunneling boring machine |
CN102477867A (en) * | 2010-11-23 | 2012-05-30 | 杨传蔚 | Novel single hydraulic prop |
CN102536289B (en) * | 2012-03-07 | 2014-04-02 | 中煤北京煤矿机械有限责任公司 | Two-column shielding large-center distance and ultrahigh-working resistance hydraulic support for medium-thickness coal seam |
US8985699B2 (en) | 2013-03-14 | 2015-03-24 | Seneca Industries Inc. | Mining methods and equipment |
CN103244152A (en) * | 2013-05-15 | 2013-08-14 | 淮南郑煤机舜立机械有限公司 | Hydraulic prop |
CN106593496B (en) * | 2016-12-09 | 2018-12-07 | 太原科技大学 | The hollow hydraulic prop device of filled type |
CN106934251B (en) * | 2017-04-25 | 2019-04-16 | 浙江大学城市学院 | A kind of calculation of ground surface settlement method in class rectangle shield tunnel construction |
AU2019346421A1 (en) | 2018-09-24 | 2021-04-29 | Joy Global Underground Mining Llc | Roof support including extendable links |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2719688A (en) * | 1949-11-21 | 1955-10-04 | Seifert Karl | Telescopic tubes |
DE1943419U (en) * | 1965-07-13 | 1966-08-04 | Hoesch Bergbautechnik G M B H | HYDRAULIC PIT STAMP WITH DOUBLE EXTENSIBILITY AND TWO SEPARATE PRINTING ROOMS. |
DE2921901C2 (en) * | 1979-05-30 | 1986-03-20 | Felix 6680 Neunkirchen Ecker | Filter that can be inserted in a pressurized water pipe |
DE10229303A1 (en) | 2002-04-03 | 2003-10-16 | Vos Richard Grubenausbau Gmbh | Manually-placed and -operated hydraulic prop, used in mining and tunnel construction, includes combined valve assembly in head plate |
DE10306128A1 (en) | 2003-02-14 | 2004-08-26 | Richard Voß Grubenausbau GmbH | Method for increasing pressure in working cylinder has a smaller inner piston to further compress the fluid and achieve a working pressure greater than the pump pressure |
CN100535394C (en) * | 2005-10-31 | 2009-09-02 | 中国矿业大学 | Suspension type hydraulic prop |
-
2007
- 2007-04-17 DE DE102007018021A patent/DE102007018021A1/en not_active Withdrawn
-
2008
- 2008-04-09 DE DE502008000961T patent/DE502008000961D1/en active Active
- 2008-04-09 AT AT08734477T patent/ATE474126T1/en active
- 2008-04-09 PL PL08734477T patent/PL2147191T3/en unknown
- 2008-04-09 US US12/450,901 patent/US8297888B2/en not_active Expired - Fee Related
- 2008-04-09 AU AU2008238408A patent/AU2008238408B2/en not_active Ceased
- 2008-04-09 EP EP08734477A patent/EP2147191B1/en not_active Not-in-force
- 2008-04-09 WO PCT/DE2008/000598 patent/WO2008125082A2/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2008125082A2 * |
Also Published As
Publication number | Publication date |
---|---|
DE502008000961D1 (en) | 2010-08-26 |
AU2008238408A1 (en) | 2008-10-23 |
US20100119311A1 (en) | 2010-05-13 |
WO2008125082A3 (en) | 2009-02-05 |
EP2147191B1 (en) | 2010-07-14 |
US8297888B2 (en) | 2012-10-30 |
PL2147191T3 (en) | 2010-12-31 |
WO2008125082A2 (en) | 2008-10-23 |
AU2008238408B2 (en) | 2013-08-01 |
DE102007018021A1 (en) | 2008-10-23 |
ATE474126T1 (en) | 2010-07-15 |
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