DE1978210U - VALVE ARRANGEMENT FOR DOUBLE-ACTING HYDRAULIC PIT PITCHES, IN PARTICULAR FOR STEPPING EXTENSION UNITS. - Google Patents

Description

■ P.A.6.38M2-9.11.67

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Oewerkeohaft EieenhUtte WostfallA, 4628 Wethmar near Lvnen

Valve arrangement for double-acting * hydraulic pit rams especially for progressive expansions

The invention is concerned with a valve arrangement for double-acting hydraulic pit rams # in particular for sohrelten-

("_. de expansion units, with valves _{arranged between the pressure chamber and the Λ} annular chamber ·

In a known hydraulically-operated pit ram, the / the piston transmitting the setting pressure is hydraulically loaded »| wherein the pressure fluid is supplied from a pneumatically operated storage container located inside the piston 'j becomes * is it known * in the piston acted upon by the setting pressure: a check valve and a valve used to aid robbery are to be provided. The valve used to aid robbery is over '. ■ - beauSchlagt the annular space between the inner punch and the outer punch and connects the stamp print room _ ■■■ during the robbery process with the storage container (DAS 1 1 ^ 9 313)

Furthermore, a pit stamp is known in which a setting valve , an oil pressure relief valve (to protect against impermissibly high pressures from the hanging wall) and two hood valves are arranged in the piston 007)

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GW, 1536

It is also known that a hydraulic “support device” was used also an overpressure safety device that responds when the pressure from the hanging wall rises, as well as a robbery aid on β3φ. middle to limit the extension length of the inner and »outer riser are not provided here either (PAS 1 048 852).

© a is also known to have an extension limit on an Örubenstempel to be provided * which is formed by bores in the wall of the outer die »(Brlt · 3Pat # 774 470)

Furthermore, an overrun limitation is known * with the one on the piston The sealing lip is located in front of a spring-loaded ball the crossing of the unconscious opening in the outer wall of the Sternpel overrun and βύ allows the outflow of the pressure medium (DAS 1 16? 275) *

Finally, prior art device is that of a limiting valve for hydraulic örubenatempel disclosed in Eats arranged inside the Innenstempolö and has a pestle, which after mechanical loading lifts a spring-loaded ball from its seat and εο the outflow of the liquid enables »

All prior publications belonging to the state of the art show either the feature of the hood aid or the feature of the extension limit or to arrange in the stamp in order to achieve the desired effect "

A proposal that is not yet part of the state of the art (file number 0 35 569 Vla / 5ö-corresponding to DAS 1 193 460) shows a hydraulic pit ram in which a number of bores are arranged one above the other in the outer wall of the Mttgraumee, which are connected to a structural unit attached to the outside of the ram stand in connection * This »structural unit, located on the outside of the stamp, serves with its 2Usorted« n in the annular space between the inner stfctap ©! and outer temple opening bores of both the flood limit as «also as» robbery aid *

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The need for an extension curve with hydraulic stem pdn * especially for bracing systems in steep storage in coal production is well known. Such extension * Limit oen prevent via a differential piston control system the slipping of the bracing or «entire air conditioning systems * well with the help of the pressure-dependent control the release of the force * coherent pretensioning between the hanging wall and the lying wall in the case of other Stamps or groups of stamps that are kept close are prevented; is "as long as" by the exit limitation (due to the Druok structure is not reached under an extending stamp »

The need for hydraulic Raubhiliö, especially at hydraulic bracing * the longer © time under full pressure have stood and wedged firmly with hanging and lying, is also well known and does not need any further Explanation. ~

Task © of the invention let it _# dai | ala correctly recognized® as m the suggestion, which is not yet part of the state of the art, shows to improve in such a way that the structural unit located on the outer wall of the stamp is avoided Stsmpalteile need to be improved by sealing sealing agents against each other and that the only way to achieve the robbery aid and the means necessary to limit the exit are simplified.

In particular, however, "it is the task of the invention * to achieve * that the annular space between the inner ram and the outer air that serves as a hoisting aid prevents the outflow from the Rittgraum from building up inadmissibly high pressure as a result of the differential effect of the pressure surfaces against such an area is effectively gesohtitat Druokaufbau "This is to prevent ty with Si" * that serving the lead terminal HohlGchraube or other assembly of the wall of the hold is stempeis herauagerißBon. This maladministration has led to accidents with the previously known hydraulic stamps ailfc robbery aid. .- ■: / ■;% ■■■. 1,. - ^: - ...... ■ / ■■ - ■■: ■ · ■■ .. ■■. - ■■

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Gw. 1536

The invention solves the task load of a valve assembly for double-acting hydraulic © props * in particular for border Ausbäueinheiten, with disposed between the punch pressure chamber and the Hing room valves characterized 'in that the valve arrangement ala stößeigeateuertea AuafahrbegrenKVngsven * til and the. The t) b®iMäraokventil designed to allow flow from the annular space into the pressure space. According to the solution according to the invention, the extension limiters and the means of the hooding aid are combined in one valve * so that this valve can be regarded as an interchangeable component enclosed in calibration * The use of U-ring seals, which are known to be larger than O-ring seals Allowing tolerances in the accuracy of the grip of the parts to be sealed against each other as well as greater pressures is only possible to a limited extent in the case of holes provided in the wall of the outer die to aid robbery, because the thin ends of the grooved rings are immediately destroyed when the liquid flows out. A valve provided inside the piston allows the use of such advantageous grooved rings *

After a long riding feature of the invention, the plunger-operated valve over befindliähe on the plunger and on Außenstömpel stops is beaufsöhlagbar * After the erfindungsgemMßen solution is thus formed by a device raechanlsöhö a valve @ g _# ateuert so that the seal; "Means serving each other" on both ram parts are no longer worn out by the flowing liquid when the extension limit is reached.

When raising the stamp Bohlet, according to a further feature of the invention, the plunger with a nose & m the lower edge of a sealing collar and lifts the exhaust valve of the valve © against the pressure of the spring force from the seat via a wide plunger or the like. The solution Irfindungsgemäöe not limited to the use of verifiable aweier or more ram _$ da Depending on the design of the piston or the valve cartridge even a ram Odej a similar "control element / the dee to Verachlußkörper valve

2 June 1966 GW * 16

takes off from the ßita, can be used *

According to a further feature of the invention, the spring force acting on the closure body is slightly greater than that during the hearing of the # upper stamp on the breechblock body © Pirated pressure, so that when the sultry low pressure is exceeded, what can happen, for example, by accidentally shutting off the drain from the piston ring space * da © valve as Iberdruok valve serves »if inadmissibly high pressure arises in the ring-shaped Tree between the inner temple and the outer monster can the hollow screw used for the supply line is no longer removed the viandung of the outer stamp out® ^ issön, since the valve Gegon opens the Pedördruck and the liquid into the druok « Entlaatoten tree can drain under the flask.

The particular © advantage of the invention is seen in the fact that di® necessary funds from »Achievement of the Auöfahrb © grenaung as well for the Raubhilf® combined in one valve, whereby this, Valve at the same time at excessively high pressures in the annulus serves as a pressure relief valve between the inner temple and the outer temple * Another advantage is seen in the wear-resistant design of the tappet-controlled valve, which is used for safety, and the use of advantageous grooved ring seals. between the inner punch and the outer punch and that makes the arrangement of the structural units located on the outer punch superfluous.

Attracted literature,

DAS 1 149 3
DAS 1 138 00T
DAS 1 048 858
DAS 1 Ί.63 275
DAS 1 150640
brit * P "774

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α 1536

Flg. 1 shows a cross-section in an exemplary embodiment

a stamp according to the solution according to the invention in ■ 'partially retracted

2 shows the punch according to FIG. 1 in a cross section when the sales limit is reached *

Between the Oberatempel 10 and the Außensterap ©! 7 an annular space 1 is provided, which is delimited at its lower end by the piston S. “By piston 2 eats against the outer punch 7 with groove ring seals 2 * 4 sealed * In the piston £ there is a tappet-controlled valve 6 * which is connected to the tappet 5 and on the external uterine oil 7, stops 8 * 9 can be acted upon. When the upper punch 10 is raised, the plunger 5 strikes a rabbit 11 on the lower edge of a sealing collar 15 and lifts over a wider one. The plunger 14 closes the valve 6 against the pressure of the spring force from the seat 16 "Λ". The arrangement of the plungers 5 * 14 is adapted to the "structural conditions of the piston 2 or" the valve cartridge 17 in the upright execution example, the force of the spring 18 is so dimensioned that the spring force acting on the closure body 15 is a little "greater than who doze when entering: $ ■ Obersterapel © 10 on dew VersöhlußkiJrper 15 burdensome pressure, 00 that in case of excessive building pressure or in the case of accidentally blocking the outflow from the annulus during the setting process, the valve 6 assumes the function of a pressure valve ₍ ; pressure valve)

Claims (1)

η s ρ ν ü ο he (Möu version) £ _# June 196 $ Valve arrangement for double-acting hydraulic © Grubenstempoli in & b © sonderö for schr & itönd ^. Expansion units, with valves arranged between the Sfcömpöldruclcrauffl and döBü Ringrauni, thereby k η η & ui ο h η β 1 _t that the valve arrangement as a push-oil release valve and the flow from the annular space into the Druökraura enables an overpressure valve is* Valve assembly; naoh claim 1 # thereby gök en n ~ z 0 Is h η et> that the attissalgostsuerte valve (6) via am ^ t ^ Bei. (5) and the stop (8 _# 9) on the outside (7) can be added - Valve arrangement according to Ampruoh 1 and Z _$ ύ ad urch S © k ö η η % ® i 0 h η *. t> that when the upper r * ram (Ip) is raised, the plunger (5) strikes with a nose (11) on the lower (IS) a © r Dichtmansöhöttö (1 ^) and over oinen The plunger (i4) odördorsl # the closing body (15) of the valve (6) lifts the pressure of the spring force from the seat (16) * "■ -. ■■; ■■ -..." .. '■■ .. '■ * ■■■'; Vöntilanordnungs according to claim 1 and / or one or more of the preceding »da <iu 2 * 0 h. gikn η ζ θ 1 ß h η < that the den VeröhlußkßrpQr (Ig) beaufeohlagead · spring force is one göringöa greater than Uw b @ ira Einfaiiren the Oberste (to) on the pre-closing body (IS) burdensea? Röubdruok * da0 IMa öb # rschröit © n um ssulisssigen Raubdruekes the Von · ti! (6) ail tlb ^ pressure valve serves « These t) n) en "oge. (6ef.ohremuno -Jntf SöhuConsoiiVis · Jie juietzf Slnoeresehen'e. <I» wefehf «m <i« f word · fossun $ οβ · urepriiBojicr, sm «r & .r», iesr- Jr,; i-bcsr _{5 &} Ci6 (eimlione '-is'jetiruriu- de · Ab'jVeichunD to. Nlchf checked. Dife: · Originally moe-enrer, J ^ x ^ er wr.-.er;.;?.' V-, ei- Imrs ^ sr; «is-itonÄer,, eaeriej» without Muchweij. Efrt & i feshtttsheri Ime: ä-i3 \ f; «c>. ': Ve5Ka" üncesenei veroer,' aw '^ mfog ^v ' * e > ti * n hie ^ / or. -juon forcKu ^ en ody film '"