EP0545023A1 - Etançon hydraulique avec soupape de pose/dépose et recirculation du liquide de compression - Google Patents

Etançon hydraulique avec soupape de pose/dépose et recirculation du liquide de compression Download PDF

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Publication number
EP0545023A1
EP0545023A1 EP92116995A EP92116995A EP0545023A1 EP 0545023 A1 EP0545023 A1 EP 0545023A1 EP 92116995 A EP92116995 A EP 92116995A EP 92116995 A EP92116995 A EP 92116995A EP 0545023 A1 EP0545023 A1 EP 0545023A1
Authority
EP
European Patent Office
Prior art keywords
valve
housing
check valve
hydraulic
stamp according
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.)
Ceased
Application number
EP92116995A
Other languages
German (de)
English (en)
Inventor
Richard 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.)
Voss Richard Grubenausbau GmbH
Original Assignee
Voss Richard Grubenausbau GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Voss Richard Grubenausbau GmbH filed Critical Voss Richard Grubenausbau GmbH
Publication of EP0545023A1 publication Critical patent/EP0545023A1/fr
Ceased legal-status Critical Current

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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
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/512—Arrangement of valves

Definitions

  • the invention relates to a hydraulic stamp for individual stamp expansion in underground mining and tunneling with a built-in the stamp head filling and robbery valve, the housing at the end of a coupling piece for the setting pistol with a grip groove and locking projection and inside a check valve for setting, a check valve for robbing and a Pressure relief valve for securing the plunger against overload, the valve housing of the pressure relief valve also representing the piston for the shut-off valve, which has a sealing attachment which is shaped corresponding to the sealing seat on the inner wall of the housing and wherein the pressure medium is environmentally friendly via a hose connection that can be clamped onto the coupling piece is dissipated.
  • Hydraulic single punches are mainly used in underground mining and also in tunnel construction, in order to secure mined cavities. For this purpose, they are stretched between hanging and lying or between the sole and the roof. In addition, they are also used in the longwall in the transition area, where due to the daily progress of mining they have to be implemented practically once or several times a day. Their use is also unavoidable where, due to the mountain conditions, shield removal or the like. Expansion can not be used or can only be used with considerable difficulty. This also applies to the half-part and steep storage. Especially in the case of the hydraulic stamps to be implemented daily, the hydraulic fluid consisting of a water-oil mixture has so far been sprayed during the robbery and thus the hydraulic stamp is driven into the environment.
  • DE-GM 89 12 529 describes that the escape of the oil-containing liquid into the pit can be prevented by pressing the hydraulic fluid through a hydraulically unlockable shut-off valve from the same valve housing end into the single stamp and also removing it again during robbery. When robbed, the hydraulic fluid flows into the return line, with the help of a Venturi nozzle or the like. Facilities of the drainage process can be accelerated, the pressure fluid then being used again for setting stamps.
  • a disadvantage of these known hydraulic rams and the associated valves is the very complicated structure of this combination valve, which is otherwise known from DE-OS 35 04 878.
  • a bore is provided in the already complicated valve body, which leads the pressure fluid to the rear of the valve housing of the pressure relief valve, so that it lifts the check valve out of the valve seat when there is a corresponding load.
  • Either the pressure fluid must be introduced via a separate setting gun or it must be ensured in another way and that the pressure fluid cannot flow through the valve into the interior of the punch.
  • the invention is therefore based on the object of providing a hydraulic ram with forced return of the pressure fluid, which is simple in construction and in operation filling and robbery valve that is easy to handle.
  • the object is achieved in that on both sides of the housing of the same design coupling pieces are arranged with a grip groove and locking projection, that the valve housing is assigned a push pin which can be moved against the force of a return spring against the rear wall of the valve housing of the pressure relief valve and thereby influencing it and ins Coupling mouth of the setting gun can be inserted, and that the hose connection with a latch bolt is designed as a suction pump connection, the coupling opening of which surrounds the piston housing of the check valve, leaving an annular channel.
  • the pressure conditions in the hydraulic ram itself are not decisive, especially since the hydraulic fluid is sucked off evenly via the hose connection and an assigned pump.
  • the suction pump connection provided here according to the invention is designed in such a way that a sufficiently large opening is provided after the shut-off valve, through which the pressure fluid can safely escape, for which purpose the annular channel is provided and is dimensioned accordingly.
  • the push pin has a ring plate which also serves as a spring plate for the return spring and as a travel limiter corresponding to a stop chamfer on the inner wall of the sleeve.
  • the push pin which is acted upon by the setting gun, is displaced against the force of the return spring, which acts directly on the push pin because it is supported on the ring plate.
  • the path that the push pin travels to open the check valve is precisely specified via the stop chamfer and the ring plate. This prevents it from opening too far, and on the other hand precisely specifies the degree of opening, which ensures that sufficient quantities of pressure fluid can enter the return line from the inside of the stamp in the shortest possible way.
  • a space-saving design is inventively created in that the return spring is arranged surrounding the valve housing of the pressure relief valve. At the same time, the spring is guided and the possibility is given to make do with a single return spring, since it can be designed accordingly.
  • the coupling piece which is arranged on the front side, is designed as a screw part that can be inserted into the housing. This means that the push pin can be positioned precisely since it is inserted into the housing in front of the coupling piece in order to then be positioned and fixed accordingly via the screwed-in coupling piece.
  • the coupling mouth of the setting gun has a groove which is arranged on the output side and receives an O-ring.
  • This O-ring rests on the corresponding part of the thrust pin, so that even at the usual high pressures hydraulic fluid cannot enter the area of the pressure relief valve or the valve housing of the pressure relief valve in order to get into the environment from there.
  • a bypass is provided in the setting pistol which releases the area between the coupling mouth and the closure valve. This bypass is opened when the robbery is complete and the handle of the setting gun has been released. Appropriate automation ensures that the setting gun can be removed in a very short time.
  • the design described so far assumes that the push pin is a separate unit, which is why the return spring is required for this. It is also conceivable that the valve housing of the pressure relief valve and the thrust pin with ring plate are a structural unit which is inserted as such into the housing of the combination valve. Then, in a way, the return spring can be omitted because the check valve spring then takes over the closing or reclosing of the check valve alone. Due to the high pressures that affect the push pin via the setting gun, the assignment of a corresponding separate return spring is advantageous.
  • suction pump connection that is suitable for the cramped conditions underground is the one in which it is of an angular design and is equipped with a plug connection with a plug clamp for the pump hose.
  • This allows the pump hose to be attached to the hydraulic hose in a downward hanging manner, so that problems caused by kinking the hose cannot occur.
  • the pump hose can be quickly connected to the suction pump connection via the plug-in connection with the plug-in clamp, so that the setup times are correspondingly short.
  • the solution according to the invention has the great advantage of being able to discharge large amounts of hydraulic fluid via the suction pump connection.
  • the pump unit provided can also have a particularly advantageous effect in that the drainage channel in the suction pump connection has a larger, preferably 25 to 50% larger diameter than the inflow bore in the setting gun. In this way, the time required for screwing in can advantageously be further reduced.
  • the tightness of the check valve is advantageously ensured, with provision being made for optimization that the sealing seat is formed on an annular support ring projecting into the interior of the housing, on the opposite support surface of which the check valve spring is supported.
  • This check valve spring ensures that the check valve is held with sufficient force in the sealing seat, wherein, as explained, the sealing seat or sealing surface and, on the other hand, the support surface of the check valve spring lie very close to one another.
  • the invention provides that the support ring has an S-shaped support surface for the shutoff valve, the sealing seat being formed by the area of the support surface projecting in the direction of the sealing attachment. This ensures that the protruding support surface bores or inserts into the actual sealing ring in order to secure the necessary seal in this way.
  • a permanently sealed combination valve is provided according to the invention if the sealing piston of the check valve has a valve cone which is flexible to a limited extent, preferably consists of plastic or is provided with a corresponding coating.
  • This valve cone rests on the sealing seat of the check valve, so that after the completion of the filling process, an effective completion of the interior of the stamp is achieved. Due to the flexible design of the valve cone, a permanent seal is ensured even after many games, which would not be the case, for example, if the sealing surface were coated with an appropriate material. Damage caused by the valve cone, which is then made of metal, would inevitably occur after several games. Since this check valve is also important with regard to the task, namely an environmentally friendly design of the hydraulic ram, the design of the sealing piston is of particular importance.
  • the invention is characterized in particular by the fact that a hydraulic stamp is created which does not pollute the environment because the water-in-oil emulsion used cannot escape into the environment even during the various functional steps. Rather, it is ensured that the pressure fluid is guided in such a way that it remains in the closed space or is returned via hoses to where it can then be returned to the pressure network after a corresponding high voltage. Since the retraction spring provided in the hydraulic ram alone does not ensure that the hydraulic fluid drains away quickly, it is advantageous that large quantities of hydraulic fluid can be discharged quickly via the suction pump connection and the corresponding suction pump. Another advantage is that the necessary changes to the combination valve require very little effort, so that even retrofitting existing single plunger valves is possible. In addition, the usual technology, that is, the setting pistol and the required latchbolts, are used, so that the miner is certainly ready to use this optimized technology.
  • the hydraulic stamp (1) shown in Fig. 1 is shown in the upper part with the stamp head (2).
  • the stamp head (2) forms the free end of the inner telescopic tube (3), which in turn is slidably guided in the outer base tube (4).
  • the return spring (5) ensures that when the hydraulic ram (1) is screwed in, the telescope (3) moves into the base pipe (4).
  • the filling and pirating valve (6) assigned to the stamp head (2) must be opened so that the hydraulic fluid can flow out of the interior of the hydraulic stamp (1).
  • the setting gun (7) is used both for filling the hydraulic ram (1) and for screwing in the handle (8) actuatable closure valve (9).
  • This shut-off valve (9) is to be bypassed via a bypass (10), which is then opened when the robbing process or the filling process is completed in order to relieve the pressure on the front region of the setting gun (7). Only then is the setting gun (7) with its coupling mouth (11) inserted into the filling and robbery valve (6) and the inflow hole (12) formed therein removed after the latch bolt (13) has also been released.
  • the filling and robbery valve (6) is inserted with its housing (18) transversely to the longitudinal axis of the hydraulic ram (1) into the ram head (2).
  • the housing (18) protrudes on both sides over the telescopic tube (3), specifically with the coupling pieces (19, 22) of the same design with a grip groove (20, 23) and locking projection (21, 24). These coupling pieces (19, 22) are used to connect the setting gun (7) or the suction pump connection (65).
  • the check valve (26) for filling the hydraulic ram (1), the check valve (34) for robbery and the pressure relief valve (44) for protecting the entire hydraulic ram (1) against overload are integrated into the housing (18).
  • the check valve (26) has a plastic sealing piston (27) as shown in FIG. 3 in particular, which with the valve spring (30) in a corresponding Recess (28) of the check valve (26) accommodated housing is inserted.
  • the sealing piston (27) with the valve spring (30) consists either entirely or only with respect to the valve cone (29) made of plastic. It is also conceivable that this valve cone (29), which rests on the sealing seat (31), is coated with plastic.
  • Fig. 3 shows that due to the formation of the valve cone (29) or the sealing piston (27), an always uniform advantageous seal is created.
  • valve cone (29) If the sealing piston (27) or the valve cone (29) is subjected to a corresponding pressure load when the setting gun (7) is attached, the valve cone (29) is pushed out of the sealing seat (31) against the force of the valve spring (30) and the hydraulic fluid can flow through the inlet bore (32) flow into the actual valve. The pressure fluid then flows into the interior of the stamp (33) via the stamp bore (46), which can also be seen in FIG. 1.
  • the check valve (34) consists of the body of the pressure relief valve (44) which is pushed back and forth accordingly, so that the check valve (34), as again shown in FIG. 3, is lifted out of the sealing seat (35).
  • the sealing seat (35) is formed on a support ring (37) projecting in the direction of the housing interior (36), the support surface (38) having the sealing seat (35), while on the other side, i.e. the check valve spring (41) can be supported on the support surface (43). This situation is shown enlarged in FIG. 3.
  • the sealing lug (39) interacts, which receives the sealing body (40), here preferably a plastic or rubber ring, so that the necessary sealing is ensured by pressing the sealing lug (39) onto the sealing seat (35) is.
  • This pressing takes place via the check valve spring (41), which, like already explained, supported on the support surface (43) and on the other hand on a spring ring (42), which is shown in Fig. 4.
  • valve housing (45) of the pressure relief valve (44) In order to remove the seal in the area of the shut-off valve (34) or sealing seat (35) and sealing attachment (39), it is necessary to move the valve housing (45) of the pressure relief valve (44) in the direction of the check valve.
  • the push pin (48) As indicated in FIGS. 1 and 4, is loaded by pressure fluid from the setting gun (7). The push pin (48) is then moved against the return spring (49), so that the valve housing (45) is also shifted in the direction of the check valve (26) by a corresponding amount.
  • the displacement of the push pin (48) is limited in that the ring plate (50) with the stop chamfer (52) acts as a travel limiter. If it moves due to the pressure of the hydraulic fluid from the setting gun (7) against the stop chamfer (52), then the valve housing (45) cannot be moved further even at a correspondingly high pressure, so that the degree of opening of the check valve (34) is precisely predetermined is.
  • Fig. 4 further shows that the coupling piece (22) is a screw part, via which the push pin (48) can then also be fixed at the same time.
  • the sleeve inner wall (53) has a thread (55) corresponding to the thread (56), so that the screwing process can be carried out easily.
  • the housing (18) consists of two parts, namely the Set the Rauben housing part (58) and the housing part (61). Both are to be connected via a thread (59, 62), with the lugs (60, 63) specifying an exact positioning of the individual plunger valve or of the filling and pirating valve (6).
  • FIG. 4 also shows the outlet bores (47) through which the excess pressure fluid can be discharged when the pressure limiting valve (44) responds.
  • this hydraulic fluid gets into the environment, which is not problematic because it is a relatively small amount. If one also wants to discharge this pressure fluid, a hose connection would have to be provided in the area of the outlet bores (47), via which this pressure fluid is also removed.
  • FIG 1 and 3 show the housing part set (61) with the suction pump connection (65).
  • This suction pump connection also has a drop bolt (66), via which the connection can be carried out in exactly the same way as with the setting gun (7).
  • the drain channel (67) in the suction pump connection (65) has a significantly larger diameter than the inflow bore (12) in the setting gun (7).
  • This and the special design of the check valve (34) ensure that a large amount of hydraulic fluid is drained off quickly.
  • the coupling opening (68) in the area of the check valve (26) is dimensioned such that an appropriately sized ring channel (70) remains between it and the piston housing (69).
  • the suction pump connection (65), as shown in FIG. 1, has an angular shape, so that the pump hose (73) can be attached hanging downward.
  • the plug connection (71) with plug clip (72) is used for this.
  • the setting gun (7) When setting the hydraulic ram (1), the setting gun (7) is placed on the housing part (61) and thus the coupling piece (19). By actuating the handle (8), the inside of the punch (33) is connected to the pump (not shown here), so that the pressure fluid can flow through the setting gun (7) into the filling and robbery valve (6).
  • the check valve (26) is opened by the pressure fluid by lifting the sealing piston (27) out of the sealing seat (31). The pressure fluid can then flow through the check valve (26) to the punch bore (46) in order to get from there into the inside of the punch (33).
  • the pressure fluid can now flow through the housing interior (36) past the piston housing (69) into the annular channel (70) and from there through the drain channel (67). Since a pump is connected to the drain channel (67) or the suction pump connection (65), this outflow is supported or accelerated.

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  • 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)
  • Check Valves (AREA)
  • Safety Valves (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP92116995A 1991-12-06 1992-10-05 Etançon hydraulique avec soupape de pose/dépose et recirculation du liquide de compression Ceased EP0545023A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4140317A DE4140317C2 (de) 1991-12-06 1991-12-06 Ventilanordnung für den Einzelstempelausbau im untertägigen Berg- und Tunnelbau
DE4140317 1991-12-06
CZ93754A CZ75493A3 (en) 1991-12-06 1993-04-27 Hydraulic prop with filling and releasing valve and a return line of pressure liquid
AU38505/93A AU3850593A (en) 1991-12-06 1993-05-12 Single hydraulic ram with filling/discharge valve and hydraulic fluid return
CA002097259A CA2097259A1 (fr) 1991-12-06 1993-05-28 Etancon hydraulique ayant un clapet de remplissage et un clapet de vidage, avec retour du fluide hydraulique

Publications (1)

Publication Number Publication Date
EP0545023A1 true EP0545023A1 (fr) 1993-06-09

Family

ID=27423102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92116995A Ceased EP0545023A1 (fr) 1991-12-06 1992-10-05 Etançon hydraulique avec soupape de pose/dépose et recirculation du liquide de compression

Country Status (6)

Country Link
US (1) US5297901A (fr)
EP (1) EP0545023A1 (fr)
AU (1) AU3850593A (fr)
CA (1) CA2097259A1 (fr)
CZ (1) CZ75493A3 (fr)
DE (1) DE4140317C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101956569A (zh) * 2010-10-25 2011-01-26 江苏三恒科技集团有限公司 三用转接阀
CN103321661A (zh) * 2013-05-15 2013-09-25 山西平阳广日机电有限公司 一种整体插装式手动换向阀
CN115163146A (zh) * 2022-05-23 2022-10-11 江苏中兴蓝光科技咨询有限公司 低位注液式悬浮单体液压支柱用三用阀

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4322912C2 (de) * 1993-06-30 1998-09-24 Vos Richard Grubenausbau Gmbh Füll- und Raubventil mit Flüssigkeitsrückführung für den im untertägigen Berg- und Tunnelbau im Einsatz befindlichen Einzelstempelausbau
AU680662B2 (en) * 1993-06-30 1997-08-07 Richard Voss Grubenausbau Gmbh Filling and recovery valve with fluid return
DE4323462C2 (de) * 1993-07-14 1995-05-04 Vos Richard Grubenausbau Gmbh Ausbaustempel für den Untertageeinsatz mit integriertem Druckbegrenzungsventil
DE19528327B4 (de) * 1995-08-02 2004-05-27 Richard Voß Grubenausbau GmbH Hochdrucksetzpistole
CN100535394C (zh) * 2005-10-31 2009-09-02 中国矿业大学 悬浮式液压支柱

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8912528U1 (de) * 1989-10-23 1989-12-21 Maschinenfabrik Jörn Dams, 4320 Hattingen Setzpistole zur hydraulischen Entsperrung eines Sperrventils zum Rauben innerhalb eines Einzelstempelventils
DE8912529U1 (de) * 1989-10-23 1989-12-21 Maschinenfabrik Jörn Dams, 4320 Hattingen Einzelstempelventil mit hydraulisch entsperrbarem Sperrventil zum Rauben

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
BE486663A (fr) * 1948-01-12
DE1408064A1 (de) * 1957-09-16 1968-12-12 Wilhelm Steinkopf Hydraulischer Grubenstempel
SU116774A1 (ru) * 1958-02-21 1958-11-30 А.С. Виноградов Гидравлическа стойка
SU507701A1 (ru) * 1974-07-16 1976-03-25 Государственный проектно-конструкторский и экспериментальный институт угольного машиностроения Гидрораспределитель дл шахтных крепей
US4237769A (en) * 1978-04-03 1980-12-09 Commercial Shearing, Inc. Relief valves and mine props incorporating the same
ZA785167B (en) * 1978-09-12 1979-08-29 Bochumer Eisen Heintzmann A hydraulic mine prop
DE3018145C2 (de) * 1980-05-12 1985-05-09 Hans Berger Meßtechnik GmbH, 5600 Wuppertal Überdruckventil zum Absichern hydraulischer Grubenstempel
DE3504878A1 (de) * 1985-02-13 1986-08-14 Thyssen Industrie AG Schmiedetechnik/Bergbautechnik, 4100 Duisburg Einzelstempelventil mit zentraldichtung
DE8808519U1 (de) * 1988-07-04 1989-11-02 Heiliger, Martha-Catharina, 5166 Kreuzau Hydraulischer Stahlgrubenstempel
DE9015929U1 (de) * 1990-11-22 1991-01-24 Maschinenfabrik Jörn Dams GmbH, 4320 Hattingen Kombiniertes Raub- und Setzventil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8912528U1 (de) * 1989-10-23 1989-12-21 Maschinenfabrik Jörn Dams, 4320 Hattingen Setzpistole zur hydraulischen Entsperrung eines Sperrventils zum Rauben innerhalb eines Einzelstempelventils
DE8912529U1 (de) * 1989-10-23 1989-12-21 Maschinenfabrik Jörn Dams, 4320 Hattingen Einzelstempelventil mit hydraulisch entsperrbarem Sperrventil zum Rauben

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101956569A (zh) * 2010-10-25 2011-01-26 江苏三恒科技集团有限公司 三用转接阀
CN103321661A (zh) * 2013-05-15 2013-09-25 山西平阳广日机电有限公司 一种整体插装式手动换向阀
CN115163146A (zh) * 2022-05-23 2022-10-11 江苏中兴蓝光科技咨询有限公司 低位注液式悬浮单体液压支柱用三用阀

Also Published As

Publication number Publication date
AU3850593A (en) 1994-11-17
DE4140317C2 (de) 1995-03-23
CA2097259A1 (fr) 1994-11-29
US5297901A (en) 1994-03-29
DE4140317A1 (de) 1993-06-09
CZ75493A3 (en) 1994-11-16

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