WO2004104375A1 - Hydrauliksteuerung für den strebausbau - Google Patents
Hydrauliksteuerung für den strebausbau Download PDFInfo
- Publication number
- WO2004104375A1 WO2004104375A1 PCT/DE2004/000787 DE2004000787W WO2004104375A1 WO 2004104375 A1 WO2004104375 A1 WO 2004104375A1 DE 2004000787 W DE2004000787 W DE 2004000787W WO 2004104375 A1 WO2004104375 A1 WO 2004104375A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- expansion
- hydraulic
- control
- valve
- Prior art date
Links
- 238000010276 construction Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/26—Hydraulic or pneumatic control
Definitions
- the invention relates to a hydraulic control for longwall construction according to the preamble of claim 1.
- This hydraulic control is known from WO 02/068798 A1.
- the advanced peculiarity of this hydraulic control system is that the control valves for actuating the power sensors of a removal frame are not only arranged in the area of the removal frame, but on this and preferably even on the respective power sensor, no hoses between the control valve and the assigned power sensor are required; Power transmitters and associated control valves can be manufactured as a structural unit and tested in particular before installation; Errors in the assembly of the control valves and force transmitters and in the laying of the hoses between control valves and force transmitters are avoided; the risk of damage to the hoses is eliminated.
- the hydraulic control described at the outset is further developed in that groups of control valves are switched completely depressurized when these control valves are in the zero position, ie when none of the control valves belonging to this group assume a switching position in which one There is a connection between the high pressure line and the encoder.
- the connection between the high pressure line and the control valves of the group is established via a common group supply line, into which a check valve is switched on. Through this group check valve, the check valve becomes the group supply line locked when all the force transmitters in the group are in a static
- this static state is queried at the electronic expansion control device which the
- Group of control valves is assigned and through which the control commands are output to the electromagnets of the control valves. If the
- Control current which is drawn from this expansion control device, drops below a limit value or drops to zero, the check valve is in its
- Streb - return line connected and it is the hydraulic flow in the
- a plurality of control valves of one expansion frame are closed
- Streb pressure line or the Streb return line connected.
- Extension frame only assigned one shut-off valve with the advantage that in the static state of this extension frame, i.e. if no
- FIG. 1 The scheme of hydraulic equipment for several reasons
- the invention relates to hydraulic control for a plurality of expansion racks.
- the expansion racks are arranged along a seam.
- the seam is cut with the cutter of a mining machine, e.g. B. the milling cutters of a cutting machine.
- the coal broken by the milling cutters of the cutting machine is loaded onto a conveyor.
- the conveyor has a channel, which is divided into individual units (channel sections).
- Each gutter section is connected to an expansion unit by a force transmitter, generally a cylinder-piston unit.
- Each expansion rack serves the purpose of supporting the longwall.
- cylinder piston units which clamp a base plate in relation to the roof plate and, above all, fold up the coal bumper on the front end of the roof plate facing the seam in front of the approaching cutting machine and then fold it back in front of the coal front. Additional functional elements and associated power transmitters are available.
- each expansion frame has the force transmitters 4, 5, 6, 7 in the form of cylinder-piston units.
- Each power transmitter is actuated by a pilot valve 8 and the main valve 9 actuated thereby.
- An expansion control device is assigned to each expansion frame.
- the expansion control devices of a plurality of expansion racks are interconnected by a common bus line 25.
- the commands for triggering the functions of the individual extensions already described can be triggered automatically or manually at a central control room or manually at one of the neighboring extension control devices or on a portable hand-held device.
- Each expansion control device 13 is assigned a power supply unit 14, by means of which the supply voltage of the line 15 to a voltage of 12 V. is transformed and rectified.
- This embodiment shown in FIG. 2 also applies to FIG. 1.
- the force transmitters 4-7 are connected via the respectively assigned main valves 9 to the longwall pressure line 16 on the one hand and to the longwall return line 17 on the other hand.
- the longwall pressure line 16 carries a very high pressure of e.g. b. more than 300 bar.
- the longwall pressure line 16 and the longwall return line 17 extend over the long length of a variety, in most cases all expansion racks.
- the units consisting of pilot valve 8 and main control valve 9 are each flanged directly to their force transmitter and connected directly to the force transmitter without being connected.
- the units of pilot valve 8 and main control valve 9 are connected to the longwall pressure line by a spur line (group connection line) 18.
- the group common return line 19 is used to connect the units consisting of pilot valve 8 and main control valve 9 to the longwall return line 17.
- a check valve 20 is switched on in the group connecting line 18. In its rest position, the shut-off valve blocks the connection between the pressure line 16 and the group connection line 18. When actuated, the flow is released. So far, the description applies to FIG. 1 and FIG. 2.
- a flow meter 21 is integrated in the group return line 19.
- the hydraulic flow to the longwall return line 17 is determined by this flow meter 21.
- the flow meter 21 is set such that an actuating signal 22 is output when the hydraulic current drops below a predetermined low limit value or to 0.
- the shut-off valve 20 is actuated by the control signal 22 and brought into its locked position. This means that when one of the pilot valves 8 is actuated, a connection is established between the supply line 18 and the return line 19, which leads to a volume flow, that the volume flow is detected by the current measuring device 21, and that the control signal 22 drops, which results in the blocking valve being blocked 20 leads.
- the group shut-off valve can be a function of the hydraulic flow in the group supply line to the removal control device Drop in the hydraulic current below a limit value in the blocking sense.
- a flow meter is provided in the feed line. It is not shown that the check valve is switched to the flow position when - as will be described in the following - an electrical control signal is present at the assigned removal control unit.
- a current measuring device 24 is switched into the connecting line 23 between the power supply unit 14 and the expansion control device 13 of each expansion frame, by means of which the control current or the current consumption of the removal control device 13 is measured. This means that the current measuring device 24 can detect whether the removal control device 13 is used via the bus line 25 to trigger one of the removal functions.
- the current measuring device 24 is set up and set such that, when a low limit value is exceeded, an actuating signal 22 is output, by means of which the check valve 20 is brought into its open position and thus the entire expansion 1 (2, 37) To the common butt pressure line 16 is placed. In this way it is ensured that the entire hydraulics of each expansion frame and in particular the hydraulic hoses, which are susceptible to damage, are depressurized when the expansion frame is in the static, unmoved state.
- Removal control device Removal control 13 Removal control device 13
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)
- Fluid-Pressure Circuits (AREA)
- Pipeline Systems (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2004241290A AU2004241290B2 (en) | 2003-05-14 | 2004-04-15 | Hydraulic control for a longwall support |
DE112004001295T DE112004001295D2 (de) | 2003-05-14 | 2004-04-15 | Hydrauliksteuerung für den Strebausbau |
US11/259,995 US7458307B2 (en) | 2003-05-14 | 2005-10-26 | Hydraulic control for a longwall support |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10321826.2 | 2003-05-14 | ||
DE10321826 | 2003-05-14 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/259,995 Continuation US7458307B2 (en) | 2003-05-14 | 2005-10-26 | Hydraulic control for a longwall support |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004104375A1 true WO2004104375A1 (de) | 2004-12-02 |
Family
ID=33440839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2004/000787 WO2004104375A1 (de) | 2003-05-14 | 2004-04-15 | Hydrauliksteuerung für den strebausbau |
Country Status (7)
Country | Link |
---|---|
US (1) | US7458307B2 (de) |
CN (1) | CN100557190C (de) |
AU (1) | AU2004241290B2 (de) |
DE (2) | DE102004017712B4 (de) |
PL (1) | PL202638B1 (de) |
RU (1) | RU2330960C2 (de) |
WO (1) | WO2004104375A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101205811B (zh) * | 2007-08-21 | 2010-12-22 | 哈尔滨工业大学深圳研究生院 | 一种液压支架电液控制系统及其阀控装置、控制方法 |
DE112010002945B4 (de) * | 2009-07-16 | 2024-09-19 | Tiefenbach Control Systems Gmbh | Hydraulische Schaltung für den Strebausbau |
US8876218B2 (en) | 2009-07-16 | 2014-11-04 | Tiefenbach Control Systems Gmbh | Hydraulic circuit for longwall support |
PL2378059T3 (pl) * | 2010-04-16 | 2013-05-31 | S A Armstrong Ltd | Usprawnienia dotyczące układów zasilania hydraulicznego przodka ścianowego |
DE102011101087A1 (de) * | 2010-05-13 | 2012-03-01 | Tiefenbach Control Systems Gmbh | Steuereinrichtung einer Ausbaueinheit im Streb eines Bergwerks |
DE102013001581A1 (de) * | 2012-02-18 | 2013-08-22 | Tiefenbach Control Systems Gmbh | Hydraulische Schaltung für den Strebausbau |
GB2521624B (en) * | 2013-12-23 | 2016-05-25 | Dolan Francis | A control apparatus for heavy machinery |
CN106246214B (zh) * | 2016-08-24 | 2018-11-06 | 日立楼宇技术(广州)有限公司 | 电磁先导阀的状态检测系统及方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4657443A (en) * | 1985-05-21 | 1987-04-14 | Bochumer Eisenhuette Heintzmann Gmbh & Co. | Arrangement for supervising synchronous displacement of the pistons of two cylinder-and-piston units |
WO2002068798A1 (de) * | 2001-02-24 | 2002-09-06 | Tiefenbach Bergbautechnik Gmbh | Strebsteuerung für den strebausbau |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2700829C2 (de) * | 1977-01-11 | 1986-04-17 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Hydraulische Ausbausteuerung |
DE2832875C2 (de) * | 1978-07-27 | 1985-11-07 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Hydraulische Steuerung für eine an der Kappe oder am Bruchschild eines Ausbaugliedes einseitig angeordnete Spaltabdeck- und Ausrichtvorrichtung |
PL147277B1 (en) * | 1984-12-17 | 1989-05-31 | Ct Kt Maszyn Gorniczych Komag | System for controlling operation of a mining machine |
US4679489A (en) * | 1985-11-04 | 1987-07-14 | Becor Western Inc. | Automatic leveling system for blast hole drills and the like |
DE3608181C2 (de) * | 1986-03-12 | 1995-01-05 | Westfalia Becorit Ind Tech | Versorgungsblock für den Anschluß hydraulischer Ausbaugestelle an die Versorgungsleitungen eines zentralen hydraulischen Versorgungssystems |
DE3825276A1 (de) * | 1988-07-26 | 1990-04-05 | Kloeckner Becorit Gmbh | Verfahren und vorrichtung zum entlasten, ruecken und setzen eines schildausbaugestells |
DE4243289C1 (de) * | 1992-12-21 | 1994-02-17 | Hemscheidt Maschf Hermann | Steuergerät für ein hydraulisches Schreitausbaugestell |
CN1274042A (zh) * | 1999-05-17 | 2000-11-22 | 李先捷 | 一种本架全液压快速移架程序控制系统 |
US6282893B1 (en) * | 1999-08-19 | 2001-09-04 | Delaware Capital Formation, Inc. | Self-contained actuator |
-
2004
- 2004-04-10 DE DE102004017712.0A patent/DE102004017712B4/de not_active Expired - Lifetime
- 2004-04-15 DE DE112004001295T patent/DE112004001295D2/de not_active Expired - Fee Related
- 2004-04-15 RU RU2005138787/03A patent/RU2330960C2/ru not_active IP Right Cessation
- 2004-04-15 PL PL378056A patent/PL202638B1/pl unknown
- 2004-04-15 AU AU2004241290A patent/AU2004241290B2/en not_active Expired
- 2004-04-15 CN CNB200480006848XA patent/CN100557190C/zh not_active Expired - Fee Related
- 2004-04-15 WO PCT/DE2004/000787 patent/WO2004104375A1/de active Application Filing
-
2005
- 2005-10-26 US US11/259,995 patent/US7458307B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4657443A (en) * | 1985-05-21 | 1987-04-14 | Bochumer Eisenhuette Heintzmann Gmbh & Co. | Arrangement for supervising synchronous displacement of the pistons of two cylinder-and-piston units |
WO2002068798A1 (de) * | 2001-02-24 | 2002-09-06 | Tiefenbach Bergbautechnik Gmbh | Strebsteuerung für den strebausbau |
Also Published As
Publication number | Publication date |
---|---|
PL378056A1 (pl) | 2006-02-20 |
US20060042243A1 (en) | 2006-03-02 |
RU2005138787A (ru) | 2007-06-20 |
AU2004241290A1 (en) | 2004-12-02 |
DE102004017712B4 (de) | 2019-05-09 |
DE112004001295D2 (de) | 2006-03-23 |
CN100557190C (zh) | 2009-11-04 |
CN1761800A (zh) | 2006-04-19 |
PL202638B1 (pl) | 2009-07-31 |
AU2004241290B2 (en) | 2009-04-02 |
US7458307B2 (en) | 2008-12-02 |
RU2330960C2 (ru) | 2008-08-10 |
DE102004017712A1 (de) | 2004-12-09 |
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