DE1910505A1 - Pressure medium system for the supply and discharge of pressure medium to pressure medium actuated devices - Google Patents

Description

PATENTANWALT BODE ■ 4033 HÖSEL · POST BOX · TELEPHONE 02102-61701 -TELEX 8585166

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GUEIICK IIMITED KIRKLESS STESE3! WIGAIT, MNCASHIRE. ENGMlD

Pressure medium systems for supplying and removing pressure medium fluid actuated devices ... -. _.

The invention relates to a pressure medium system, ssur supply and Discharge of pressure medium to at least two pressure medium actuated Devices whose punctures are controlled from a central control point «,

In such DruekmittelsystemeB difficulties may occur when two or more of the druekmittelbetätigten devices can flow off pressure medium into a common discharge line _s because in this case the pressure medium "that of a device flows * of the other device can again flow to ₉ so as to check malfunctions arise .. .. D ^ rch. the advantages J described's gang there _{D 9} that one of the ^ devices running under some circumstances even possible opposite actually intended motion movement "because it is eye into reality pressure fluid through the line over which the pressure medium to flow out eigentlich- ₉

The above-mentioned difficulties have a particularly unpleasant effect with self-advancing hydraulic ones Pit support elements for submissive mining operations,

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PATENTANWALT BODE 4033 HÖSEL POST BOX TELEFON 02102; - 61701. TELEX 8585166 -

which are provided with hydraulically extendable rams and a double-acting hydraulic return cylinder j, whereby the ram and the return cylinder are controlled by _: a central control valve a drainage line, with the risk that the pressure medium flowing out of the return cylinder flows back to the rams, so that they are extended again or remain extended, rest on the hanging wall and thereby impede the advancement process. This applies especially »since the stamps of the extension element are not generally designed to be double-acting, but are retracted under the weight of the upper parts of the stamp ο

It is therefore the object of the invention to create a pressure medium system for supplying and removing pressure medium to two or more pressure medium-actuated devices ₉ in which the difficulties described above do not occur.

The invention relates to a pressure fluid system for Supply and discharge of pressure medium to at least two draekraittelbetätlgten devices, that thereby indicates that with simultaneous discharge the pressure medium from the pressure-actuated devices the outflowing pressure medium flows are separated from each other, so that a mutual disturbance of the functions the pressure medium operated devices is avoided «, by this separation of the flowing pressure medium flows

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PATENTANWALT BODE 4033 HDSEL POST BOX TELEPHONE 02102-61701 -TELEX 8585166

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It is completely excluded "that one of the -pressurized medium-" pressure medium flows into one of the -pressure-actuated devices via its drain line, which could cause a reversal or _c disruption of the punctures of this pressure-actuated door direction ", -

The functions of the pressure medium-actuated Devices controlled by a single control valve to which the fluid operated devices are connected are. Furthermore, sswischen is in the connection one of the pressure medium actuated devices and the control valve and a drain line is a switching valve built in »that blocks the flow to the control valve and at the same time the flow su äer discharge line releases when over from the fluid-operated device this connection flows off pressure medium. This special design of the pressure medium system ensures that, in spite of the separation of the outflowing pressure medium flows, only a single control valve is used to control the Functions of the individual pressure-actuated devices are required by & v

To avoid that pressure medium "from the drain line to the fluid-operated device, flows back, a non-return valve is built into the connection between the switch valve and the drain line "'

A separate drainage line is expediently provided for each of the fluid-operated devices

The control valve expediently has a large number of

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PATENTANWALT BODE · 4033 HOSEL · POST BOX · TELEPHONE 02102-6170] '^ TELEX 8585166' "

Pressure medium connections and a slide with a cavity _? whereby individual thickening medium connections can be selectively connected to one another by a relative movement between the slide and the pressure medium connections.

As already indicated at the beginning, there are special advantages through the use of a Bruekmittelysterne8 according to the invention in connection with a self-advancing hydraulic pit lining element, since the described Hachteile of the known pressure medium 'systems are particularly unpleasant here and lead to the inability to puncture the entire expansion element can lead ο Another object of the invention is. Therefore to be seen in a pressure medium system, which is used to supply and discharge pressure medium to the rams and to a double-acting return cylinder of a self-advancing hydraulic construction element for underground mining operations, and in which a former control valve to control the functions of the stamp and the return cylinder it is provided that the pressure medium system is characterized by the fact that in the connection between the control valve and the pressure medium connection of the hydraulic return cylinder, from which pressure medium flows out when the expansion element is advanced, and a switch valve is installed in a flow line, the flow out of pressure medium said pressure means ⁰ connection the flow control valve locks au the imü same time the flow of sm Abflußleituag frelg here is incorporated appropriately ia the connection swisebss valve and the drain line eia Rückscalsgrsatil "

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PATENTANWALT BODE · "4033 HÖSEL · POST BOX · TELEPHONE 02102-61701- TELEX-8585T66

An example embodiment of the object The invention is described below with reference to the accompanying Drawing-described in dar

Pig ", 1 shows a perspective view of a self-advancing, hydraulically operated G-rubenausbauelement which is provided with the pressure medium system according to the invention ₉ and

Fig. 2 in a schematic representation of the hydraulic Shows printing system according to the invention.

The expansion element shown in Figo 1 has several hydraulic ram 10 and a double-acting hydraulic return cylinder 11. The rear cylinder is initially used to push a conveyor C against the torso the newly exposed dismantling front and for the subsequent tightening of the extension element against the ! Conveyor 0 and thus against the dismantling front »When the conveyor G is advanced, the punches 10 of the dismantling element remain braced between hanging and lying so that. the expansion element served as an abutment When tightening the expansion element, however, the stamps released from the tension between hanging and lying, while the already advanced conveyor - G as Abutment is used.

In Fig. 2, the stamp 10 'and the return cylinder 11 and the conveyor 0 are shown schematically. Oil line 12 is provided for the supply of pressure medium, while the lines 13 and 14 serve to discharge pressure medium.

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PATENTANWALT BODE 4033 HÖSEL - POST BOX TELEPHONE 02102-61701 TELEX 8585166

The pressure medium sti.- and -abfuhr su the stamps 10 resp. the rear cylinder 11 is centrally controlled by a control valve 15 controlled that let designed as a rotary slide valve. The control valve 15 has a pressure medium connection 16 » which is connected to the stamp 10, a connection 17, the one with a Druekmittelansehluß 11a on the entry side dea hydraulic Rüeksylladers 11 is connected to a Connection 18β is connected to the discharge line 13 and a connection 19 »via a reversing valve 20 with a Dxuoloiilttelansohluß 11b on the atssfahrseite des hyäraulIseheB Rückzyllnclsra 11 is related to “Der Druelänlttelanschluss 11b deo hydraulic return cylinder 11 is also connected to the drain line 14 via the reversing valve 20 and a check valve 21.

Bas 3) rehsohi © bervent: Ll 15 waist also has a connection via which "the Tersoffgiingsleltung 12 can optionally be connected to the connections 1β ₉ VJ or 19 via the passage cavity 23 of the D2? Elisühlöberventiles 15"

In]? Ig "2 Is the rotary slide valve 15 in its new -tralen position shown

WSIM the Kolbenseange the electrohydraulic return cylinder 11 to be extended ,, πα the conveyor G against the working face vor3uaßhieb6'n ₃ wird- daa rotary valve 15 is set _t -that exerts Dxruöltxiittelanschluä 11b so communicates with the yersorgungsleitung 12 In Tsrbindung that glelöh & eltlg the Drueksaittelanseliluß 11a to the drainage line 13 aage sohlessan I8t _a Here the overflow »

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PATENTANWALT BODE -4033 HÖSEL · POST BOX · TELEPHONE 02102-61701 ■ TELEX 8585166

valve 20 operated so that the connection between the rotary slide valve 13 and the pressure medium connection 11b is open, while the connection between the Druckmittelansohluß.11b and the drain line 14 is shut off by the reversing valve 20.

When the piston rod of the hydraulic return cylinder is to be retracted »in order to pull the expansion element against the dismantling front _p the rotary slide valve is set _P so that the Druclaaittelansohluß 11 a on the entry side of the hydraulic Rüokzylinders 11 is in connection with the pressure medium supply line 12 the drain line 13 connected o, The pressure medium connection 11b on the extension side of the hydraulic return cylinder is connected to the drain line 14 via the TJmsteuerventil 20 and the check valve 21 19 is interrupted “As a result, the leakage fluid escaping from the hydraulic return cylinder 11 on the right-hand side (in Fig. 2) cannot be fed to the punches 10 on any pail * so that impairment of the Einfakrvorg & ssges of the punches 10 is not possible I am «

With the previously known pressure medium systems during the retraction of the Rtieksjlinder 11 from the Sruckmittelansehluß ITb escaping hydraulic fluid Flow via the Draolaaittelanssliltsß 19 to the drain line 13 «Through this pressure fluid then the

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PATENTANWALT BODE 4033 HÖSEL POST BOX -TELEPHONE 02102-61701 -TELEX 8585106

Einfshrvorgasg the punch 10 de a expansion element impaired s because this pressure fluid flowed to the punch 10 again so that the punch 10 could not be retracted ■ and thus the Torrückelcvorgang the expansion element was hindered _o

In the DruekmittelBystem according to the invention is, however, ρ regardless of the fact ₉ that the Druokmittelzüfuhr is carried out both to the punches and to the rear cylinder on the Drehsehieberventil 15 "exiting the DruökmittelanSchluß 11b pressurized fluid through the changeover valve 20 is prevented from the stamp

Apply pressure su to 10 of the expansion element _o This pressure fluid emerging from the pressure medium connection 11b, on the other hand, is fed to a second drainage line 14 via the control valve 20 and the check valve 21, bypassing the rotary valve valve 15 and 14 are combined “This is particularly possible if the backflow occurring in these lines is relatively small. In summary, it is pointed out again ₈ that in the known pressure medium systems intended for the same purpose, the pressure medium supply and discharge both to and from the stamps 10 and also to. vma are controlled exclusively by the hydraulic return cylinder 11 through the tent. valve 15. Accordingly, all the pressure medium flows flowing in and out pass through the valve 15 = in the subject matter of the invention, however, it is provided that the pressure medium connection 11b of the reverse cylinder

11 escaping Druekflüseiglceit the valve 15 bypasses _o

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Claims (1)

PATENT ADVERTISER BODE. 4033 HDSEL POST BOX TELEPHONE 02102-61701 -TELEX 8585166 "9 - R-I- 234 Fuel system aur 2u «» and discharge τοπ pressure medium at least awi -suckmittelbetätlgten-ToiTiohtiingeii, thereby kea ns © lean that "with simultaneous discharge of the pressure medium from the pressure medium-actuated devices (1O ₉ II) are a rush off , so that a mutual disturbance a © r of the fluid-operated device days- (10 ^ 11) is avoided. 2} Druökmitt si system according to. Aaspnieli 1 ₉ a adu 3? e b. gs ka na s θ Ig hu © t _s that di © functions of dniokmittelbetätigtefi Vorrlchtnangen (10,1.1) ron an oil algae control valve (15) gesteueirt "Raees to which the druclcmittelbetätlgten TorrichttiBgeii are öngesehloaesn '' (10 _11?) -., " 3) DruckmlttelBystea Bach Sea AxiBpinißheii 1 md 2 _P da - ά u raw. ge characterizing ieh as "β t _s that in the compound one of the feüölmlttelbetätlgten Yorrichtiingen (11) and Clem control valve (15) and a Abflußleitimg (14) .. iäwisehen a changeover valve. (20) is installed "the d © n Buröhfluß zn d © m SteuenreBtll (15 x) sperrt- IAAD gleichiEseltrig AESN flow below the discharge pipe (14) releases ₉ weas ana above the druokm.lttelbietätigten device (11), this connection flows pressure medium « 10 - 90 9 84 1/0932 ■ • \ ■ ■ PATENTANWALT BODE ■ 4033 HÖSEL · POST BOX ■ TELEPHONE 02102-61701 -TELEX 8585166 ■ - "ίο - ■ '19T05Q5 4) DruckialttelayBtem according to claim 3, that you know »E rejects that In the connection between the switching valve (20) and the drainage line (14) a check valve (21) is installed. 5) Pressure medium system naoh one or more of the claims 1 "- 4, thereby geke η η ζ β 1 ο h _— set that for each of the pressure medium actuated Yorrlchtmigen (10 bsv / ₆ 11) a separate drain line α (13) baw _e 14) is provided. 6) Pressure medium system according to claims 2 - 5 »because through geke η η ζ e 1 eh η β ti that the ^: control valve a Ylelisahl of pressure medium connections (16,17 * 18 _t 9 | 22) and a slide with a cavity (23) has, wherein individual pressure medium connections (16,17,18,19,22) can be selectively connected to one another by a relative movement between the sehleber and the pressure medium connections (16,17,18,19,22). 7) Druckmitteleystem according to one or more of the An-Proverbs 1 - "6, etc. & a for supplying and removing of pressure medium to the stamps as well as a double-acting rear cylinder of a self-advancing hy" · metallic expansion element © s used for untertäglge mines and in which a single control valve to control the punctures dex * stamp and the Rüekzyllnders is provided9 thereby geke η η ζ & i η e t that in the connection between the control valve (15) and the pressure medium connection (11b) of the hydraulic - 11 - 9098A1 / 0932 PATENTANWALT BODE · 4033 HÖSEL · POST BOX · TELEPHONE 02102-61701 ■ TELEX 8585166 Back cylinder (11) * from when moving the expansion element Pressure medium flows off and a switchover valve (20) is installed in a discharge line (14), that when pressure medium flows out of said pressure medium connection (11b) the flow to the The control valve (15) blocks and at the same time releases the flow to the drain line (14). 8) pressure medium system according to claim 7 »thereby marked .lehnet »that in the connection A check valve (21) is installed between the switching valve (20) and the drain line (14) 909 84 1/09 3 2 BATH ORIGINAL