EP2291586B1 - Dispositif destine a augmenter la pression dans des cylindres, avec equipement de commutation - Google Patents

Dispositif destine a augmenter la pression dans des cylindres, avec equipement de commutation Download PDF

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Publication number
EP2291586B1
EP2291586B1 EP08773265A EP08773265A EP2291586B1 EP 2291586 B1 EP2291586 B1 EP 2291586B1 EP 08773265 A EP08773265 A EP 08773265A EP 08773265 A EP08773265 A EP 08773265A EP 2291586 B1 EP2291586 B1 EP 2291586B1
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EP
European Patent Office
Prior art keywords
check valve
valve
pressure
cylinder chamber
pressure pump
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.)
Not-in-force
Application number
EP08773265A
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German (de)
English (en)
Other versions
EP2291586A1 (fr
Inventor
Wolfgang Voss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PL08773265T priority Critical patent/PL2291586T3/pl
Publication of EP2291586A1 publication Critical patent/EP2291586A1/fr
Application granted granted Critical
Publication of EP2291586B1 publication Critical patent/EP2291586B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/214—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being hydrotransformers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves

Definitions

  • the invention relates to a device for increasing the pressure in cylinders, in particular of hydraulic expansion in underground mining and tunneling with its cylinder housing, piston, piston rod and arranged therein clamping piston and in the cylinder space retractable clamping piston rod via a connecting line with an integrated switching device via a high-pressure pump Pressure fluid can be acted upon.
  • a pressure transmitter which is oil, water, water in oil, plasma or other liquid or even air.
  • Hydraulics is the teaching and technical application of flows in compressible fluids. This means that in the hydraulic fluid, but especially oil or water-oil emulsion initially in a high-pressure pump affected accordingly, ie biased to then be supplied via hose or similar lines to the cylinder. Valves are used to control the extension and retraction of the cylinders, always using one and the same pressure, namely the pressure dependent on the power of the high-pressure pump.
  • the invention is therefore based on the object to provide a simple and secure working switching device for cylinders with internal, the pressure in the cylinder chamber significantly increasing clamping piston.
  • the switching device is designed via a pilot-operated check valve in the connecting line between the high-pressure pump and piston rod cavity and a valve block with further unlockable or lockable check valves in the connecting line between the high pressure pump and cylinder space.
  • valve block with the unlockable or lockable check valves it is initially possible, the necessary initial pressure for the extension of the piston within the cylinder housing in push the cylinder space into it by connecting to the high pressure pump.
  • this valve block is at the same time designed so that during later unloading of the cylinder or when diverting the high pressure hydraulic fluid is also ensured that just through this connection line pressure fluid is returned to the tank without the risk that it is too an overload and thus the failure of the entire switching device comes.
  • the switching device also has a pilot-operated check valve in the region between the high-pressure pump and the piston rod cavity, so that it is possible after filling the cylinder chamber and extending the piston rod via the clamping piston and clamping piston rod targeted pressure in the cylinder chamber so that, for example, at an initial pressure of 175 bar then after pressing the tensioning piston in the cylinder chamber a pressure of 700 bar is present.
  • This is a hydraulic expansion to be realized with the same design of a cylinder, which is used in a variety of applications and provided with high setting pressures available.
  • a set pressure of 600 t can be achieved with appropriate training, which represents a significant improvement in underground safety.
  • the valve block has a blocking against the high-pressure pump and a blocking against the cylinder chamber unlockable check valve and a tank associated with the lockable check valve. So it is possible with one and the same valve block, first of all via the first pilot-operated check valve in the region of the high-pressure pump port to direct the pressure on the lockable check valve, so this closes and the hydraulic fluid can not get into the tank, but rather that second pilot-operated check valve opens , so that the hydraulic fluid from the high-pressure pump can flow directly into the cylinder chamber. If this is filled and the subsequent "Nachspannvorgang" can be initiated, closes the first check valve on the valve block and the connection between the high-pressure pump and the cylinder chamber is closed. This can now on the in the Pilot line to the piston rod cavity arranged pilot-operated check valve pressure fluid into the piston rod cavity are led so that the clamping piston is actuated. This is the already repeatedly mentioned "Nachspannvorgang".
  • a lockable check valve is arranged in such a way that it is designed as lockable by connecting to the high-pressure pump, otherwise permanently open check valve.
  • the closing piston is not held by a spring in the closed position, but rather influenced in the opposite direction, so that the valve is always open.
  • this lockable check valve connected to the high-pressure pump the valve piston is pushed against the force of the spring in the closed position and this lockable check valve is closed.
  • the hydraulic fluid can be safely transported from the high pressure pump via the two pilot operated check valves in the cylinder chamber. Should then be discharged while relaxing pressure fluid, this is done via the first check valve and then relieved lockable check valve, so that the pressure fluid can flow directly into the tank.
  • the second pilot-operated check valve in the area of the high-pressure pump is closed, so that the hydraulic fluid can only flow out through the non-returnable check valve.
  • the non-returnable check valve blocking the high-pressure pump can be connected to the high-pressure pump at the same time as the lockable non-return valve. Accordingly, if the connection is opened, the hydraulic fluid simultaneously flows into the lockable check valve and closes it and opens the unlockable check valve, so that now the hydraulic fluid can flow out via the first pilot-operated check valve in the direction of the cylinder chamber. This creates a virtually idiot-proof circuit.
  • the above-mentioned lockable check valve and the blocking against the cylinder chamber check valve are designed to be switchable via a respective 2/2 way valve.
  • the lockable non-return valve associated 2/2 way valve at the same time the high-pressure pump associated pilot operated check valve is affected and opened, so that only a 2/2 way valve is required due to the connection of these two check valves.
  • the second mentioned 2/2 way valve is used to open the first, the cylinder chamber associated check valve when the cylinder chamber to be connected to the high-pressure pump.
  • a pressure switch adjustable to the filling pressure of the cylinder space is provided on the output side of the non-return valve blocking the cylinder space.
  • This pressure switch is monitored both in the connection with the cylinder chamber as well as relieving the cylinder chamber, that in each case a pressure of for example 175 bar prevails in the connecting line. If this is not the case, locks this pressure switch, which can be set exactly as already mentioned to the pressure level that is desired or necessary for each use.
  • a pressure relief valve Generally prescribed in such cylinders in underground mining and tunneling the use of a pressure relief valve. Due to the special conditions here, namely the more or less arbitrarily adjustable pressure conditions in the cylinder chamber, it is necessary to use a suitable pressure limiting valve, including the invention provides that the cylinder chamber is assigned to the respectively necessary or desired pressure in the cylinder chamber or adjustable pressure relief valve , The pressure limiting valve can or should be adjustable in accordance with narrow limits to provide very versatile for the necessary security.
  • the piston rod cavity associated unlockable check valve is designed to be switchable via a 3/4 way valve.
  • the pressure fluid required for the pressure increase in the cylinder chamber can be easily introduced into the piston rod cavity in a simple manner, namely, by opening this pilot-operated check valve and at the same time pressure fluid is introduced over it. Is the "Nachspannvorgang" then completed lock this pilot-operated check valve automatically and the support or setting work can be done.
  • this pilot-operated check valve is then reconnected to the high-pressure pump via another switching operation, so that the hydraulic fluid in the piston rod cavity has the same level and that opens pilot-operated check valve and allows leakage of hydraulic fluid in the direction of the tank.
  • the said three 2/2 way valves and a 3/4 way valve can be present and upgraded individually, it being expedient to form the 2/2 and 3/4 way valves as electrically, hydraulically or electrically / hydraulically switchable switching valves. It is also conceivable that the 2/2 and the 3/4 way valves are combined via a common circuit board, so that the dependent switching and the time periods provided for easily given and the whole process "automated" can run.
  • valve block with the two unlockable and the lockable check valve has a common, the cylinder associated valve housing.
  • the invention is characterized in particular by the provision of a device with which it is possible to safely increase the pressure of the hydraulic fluids in cylinders and similar components without the risk of errors caused by any incorrect switching operations, dependent switching or the like , On the contrary, it can be seen that with the switching device according to the invention, a variable but targeted pressure increase in the said cylinders can be realized.
  • the required switching valves or check valves are so cleverly and securely housed in a common valve housing that especially the special conditions in underground mining and tunneling can be advantageously done.
  • a used in underground mining cylinder 1 is in FIG. 1 played. He is part of the hydraulic expansion 2, which is used in the brace 3 to support hanging 4 and 4 lying against each other and so the to keep opened cavity open.
  • the Hangendkappe 6 is also formed in several parts as the sleepers 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 hydraulic expansion 2, which is also referred to as a shield construction, the break 11 drops and closes the created cavity again.
  • FIG. 2 shows a simplified reproduced circuit diagram for said switching device 21.
  • the cylinder 1 is acted upon with hydraulic fluid, so that the piston 15 is pushed out with the piston rod 16 from the cylinder housing 14 and clamped against the hanging wall 11.
  • a clamping piston 17 with a clamping piston rod 18 is arranged within the piston rod 16.
  • the pressure fluid located in the piston rod cavity 26 can additionally be pressed into the cylinder space 20, after it has previously been filled, for example, with a pressure fluid at 175 bar. How this is done is described below.
  • a valve block 28 with unlockable check valves 29, 30 and a lockable check valve 31 is arranged between the high pressure pump 23 and the cylinder chamber 20.
  • This valve block 28 is turned on in the connecting line 22 and ensures that the hydraulic fluid from the high-pressure pump 23 selectively reaches into the cylinder chamber 20 but also into the piston rod cavity 26. The latter is done by pressing the 3/4 way valve 39, so that the high-pressure pump 23 is virtually directly connected to the piston rod cavity 26.
  • the unlockable check valve 25 is thereby automatically passed by the pressure fluid. After completion of this only later introduced Nachspannens or Nachwishings then closes the pilot-operated check valve 25 and ensures that the hydraulic fluid in the piston rod cavity 26 remains secured.
  • the said pilot operated check valve 25 is accommodated in the connection line 22 '.
  • pressure fluid is initially conducted via the 2/2 way valve 36 'into the lockable check valve 31 and simultaneously into the unlockable check valve 30.
  • the lockable check valve 31 is initially closed and at the same time or shortly after the pilot-operated check valve 30 is opened.
  • pressure fluid from the high-pressure pump or via the high-pressure pump 23 and the connecting line 22 'to the first pilot-operated check valve 29 are passed, which is opened accordingly and then pushes the pressure fluid into the cylinder chamber 20 past the pressure switch 34.
  • the said pressure switch 34 is assigned, via which the pressure level of the overflowing pressure fluid can be checked to interrupt the conveying process in case of doubt, to avoid damage.
  • the pressure relief valve 35 will record its monitoring function and Ensure that an overload of the cylinder 1 does not occur by 35 pressure fluid is sprayed at the appropriate overpressure on the pressure relief valve.
  • the pilot-operated check valve 25 is opened via the 3/4 way valve 39 and at the same time via the 2/2 way valve 36, the unlockable check valve 29. Since the pilot-operated check valve 30 is closed and the lockable check valve 31 opens again by actuating the 2/2-way valve 36 ', the hydraulic fluid can now escape from the cylinder chamber 20 into the tank 32. This process is further supported by the fact that via the 2/2 way valve 38 of the annular surface space 37 is filled with hydraulic fluid. This presses on the piston ring surface and ensures that the insertion process of the piston 15 is supported. When later tensioning of the cylinder 1, the switching and control process already described then takes place.
  • valve block 28 which is housed in a stable valve housing 40, which is based on the Figures 3 and 4 briefly explained.
  • FIG. 3 shows in the upper part of the lockable check valve 31, which is not applied in the switching state shown due to the spring 42 on the sealing surface 41 with its sealing head 44. If the supply of pressure fluid now occurs via the inlet 43, then the sealing head 44 is pushed against the force of the spring 42 into the sealing surface 41.
  • hydraulic fluid also passes through the inlet 47 in the pilot operated check valve 30, whereby the sealing head 46 is pushed against the force of the spring 45 from the associated sealing surface out.
  • pressure fluid can flow in the direction of the first unlockable check valve 29 and thus connecting line 22 via the pump connection 48.
  • 50 is the Piston of the pilot-operated check valve 30 and designated by the piston 51 of the lockable check valve 31st
  • FIG. 4 shows a plan view of the valve housing 40, wherein by a section and the first releasable check valve 39 can be seen. Also in this check valve is a pilot-operated check valve 29, to which the spring 55 ensures that the pilot-operated check valve 29 is closed in the rule. If pressure is now supplied via the inlet 56 via the 2/2 directional control valve 36 to the pilot-operated check valve 29, the piston is loaded accordingly and ensures that the sealing head 59 is moved out of the sealing surface and against the force of the spring 55, wherein the piston is denoted by 57. While the connection 58 leads to the cylinder 1 or to the cylinder space 20 or represents the connection, the connection 49 is shown in FIG FIG. 3 the one who represents the connection to the tank 32.
  • the holder is designated, with which the valve housing 40 fixed to the cylinder 1.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (12)

  1. Dispositif pour l'augmentation de pression dans des cylindres (1), en particulier de construction hydraulique (2) dans l'exploitation minière et construction de tunnels souterraines, qui peuvent être alimentés en fluide hydraulique avec leur boîtier de cylindre (14), piston (15), tige de piston (16) et piston de serrage (17) disposé à l'intérieur de ce dernier et leur tige de piston de serrage (18) pouvant être enfoncée dans le cylindre (20) via une conduite de raccordement (22) avec mécanisme de couplage (21) intégré via une pompe à haute pression (23),
    caractérisé
    en ce que le mécanisme de couplage (21) est formé de manière à disposer d'un clapet de non-retour déblocable (25) dans la conduite de raccordement (22') entre la pompe à haute pression (23) et la tige de piston (26) et d'un bloc-soupapes (28) avec d'autres clapets de non-retour (29, 30, 31) déblocables et blocables dans la conduite de raccordement (22") entre la pompe à haute pression (23) et le compartiment cylindre (20).
  2. Dispositif selon la revendication 1,
    caractérisé
    en ce que le bloc-soupapes (28) présente un clapet de non-retour blocable (30) qui bloque contre la pompe à haute pression (23) et un clapet de non-retour déblocable (29) qui bloque contre le compartiment cylindre (20) ainsi qu'un clapet de non-retour (31) blocable qui est affecté au réservoir (32).
  3. Dispositif selon la revendication 2,
    caractérisé
    en ce que le clapet de non-retour blocable (31) est formé comme clapet de non-retour blocable par raccordement à la pompe à haute pression (23) et qui est, autrement, en permanence ouvert.
  4. Dispositif selon la revendication 2,
    caractérisé
    en ce que le clapet de non-retour déblocable (30) qui bloque contre la pompe à haute pression (23) peut simultanément être raccordé au clapet de non-retour blocable (31) côté ouverture et à la pompe à haute pression (23).
  5. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que le clapet de non-retour blocable (31) et le clapet de non-retour (29) qui bloque contre le compartiment cylindre (20) sont formés de manière à être connectables chacun via un distributeur 2/2 voies (36, 36').
  6. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce qu'est prévu, côté sortie du clapet de non-retour (29) qui bloque contre le compartiment cylindre (20), un manocontacteur (34) réglable sur la pression de remplissage du compartiment cylindre (20).
  7. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce qu'est affectée au compartiment cylindre (20) une soupape de limitation de pression (35) réglée ou réglable sur la pression respectivement nécessaire ou souhaitée dans le compartiment cylindre (20).
  8. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce qu'est affectée à l'espace torique (37) autour de la tige de piston (16) une vanne de commande 2/2 voies (38) pour le raccordement à la pompe à haute pression (23).
  9. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que le clapet de non-retour déblocable (25) affecté à la cavité de tige de piston (26) est formé de manière à être connectable au moyen d'un distributeur 3/4 voies (39).
  10. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que les distributeurs 2/2 et 3/4 voies (36, 36', 38, 39) sont formés comme soupapes de commande électriques, hydrauliques ou à commande électrique/hydraulique.
  11. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que les distributeurs 2/2 et 3/4 voies (36, 36', 38, 39) sont regroupés par l'intermédiaire d'une plaque à circuits imprimés commune.
  12. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que le bloc-soupapes (28) présente avec les deux clapets de non-retour déblocables et le clapet de non-retour blocable (29, 30, 31) une boîte de soupapes (40) commune affectée au cylindre (1).
EP08773265A 2008-06-17 2008-06-17 Dispositif destine a augmenter la pression dans des cylindres, avec equipement de commutation Not-in-force EP2291586B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08773265T PL2291586T3 (pl) 2008-06-17 2008-06-17 Urządzenia do podwyższania ciśnienia w cylindrach mające urządzenie przełączające

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2008/000982 WO2009152786A1 (fr) 2008-06-17 2008-06-17 Dispositif destiné à augmenter la pression dans des cylindres, avec équipement de commutation

Publications (2)

Publication Number Publication Date
EP2291586A1 EP2291586A1 (fr) 2011-03-09
EP2291586B1 true EP2291586B1 (fr) 2012-05-30

Family

ID=40464133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08773265A Not-in-force EP2291586B1 (fr) 2008-06-17 2008-06-17 Dispositif destine a augmenter la pression dans des cylindres, avec equipement de commutation

Country Status (4)

Country Link
EP (1) EP2291586B1 (fr)
DE (1) DE112008003985A5 (fr)
PL (1) PL2291586T3 (fr)
WO (1) WO2009152786A1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04157206A (ja) * 1990-10-16 1992-05-29 Hitachi Constr Mach Co Ltd 増圧機付油圧シリンダ
DE10306128A1 (de) * 2003-02-14 2004-08-26 Richard Voß Grubenausbau GmbH Verfahren und Vorrichtung zur Druckerhöhung in Zylindern, insbesondere hydraulischen Stempeln

Also Published As

Publication number Publication date
WO2009152786A1 (fr) 2009-12-23
PL2291586T3 (pl) 2012-11-30
EP2291586A1 (fr) 2011-03-09
DE112008003985A5 (de) 2011-06-09

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