EP0224242B1 - Soupape hydraulique pour l'industrie minière - Google Patents

Soupape hydraulique pour l'industrie minière Download PDF

Info

Publication number
EP0224242B1
EP0224242B1 EP86116351A EP86116351A EP0224242B1 EP 0224242 B1 EP0224242 B1 EP 0224242B1 EP 86116351 A EP86116351 A EP 86116351A EP 86116351 A EP86116351 A EP 86116351A EP 0224242 B1 EP0224242 B1 EP 0224242B1
Authority
EP
European Patent Office
Prior art keywords
valve
electromagnet
hydraulic
hydraulic valve
piston
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.)
Expired - Lifetime
Application number
EP86116351A
Other languages
German (de)
English (en)
Other versions
EP0224242A1 (fr
Inventor
Kurt Faust
Ernst Mateja
Felix Ecker
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.)
ECKER MASCHINENBAU GMBH & CO. KG
Original Assignee
Ecker Maschinenbau & Co KG 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 Ecker Maschinenbau & Co KG GmbH filed Critical Ecker Maschinenbau & Co KG GmbH
Publication of EP0224242A1 publication Critical patent/EP0224242A1/fr
Application granted granted Critical
Publication of EP0224242B1 publication Critical patent/EP0224242B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • the invention relates to a hydraulic valve for mining, in particular for the neighborhood control in the stride, the valve body is moved by a piston cylinder which is controlled by a valve actuated directly by an intrinsically safe electromagnet.
  • the hydraulic valves cannot be operated directly. They require feedforward control, i.e. mechanical actuators. To do this, the hydraulic medium is again used: a piston cylinder is actuated with it, which moves the valve body of the hydraulic valve.
  • the intrinsically safe electromagnet is comparatively weak, it cannot directly control the application of the hydraulic medium to the piston cylinder without disadvantages. In between, too, there is largely a gradation.
  • the aim is to keep a consumer's current consumption as low as possible in order to remain in the intrinsically safe area with several consumers: Often there is a need to switch several hydraulic valves simultaneously with the same line; the total current flow should not exceed the limit of 12 V and 1 A, which is considered to be intrinsically safe.
  • the aforementioned stepped feedforwards require 280 mA at 12 V.
  • the invention has for its object to provide a pilot control for a valve of the mining hydraulics, which is simpler than the step control mentioned and has a low power consumption.
  • this purpose is achieved in such a way that the piston cylinder is a pneumatic cylinder and the electromagnet works with a current less than 280 mA.
  • the viscosity of the compressed air is incomparably lower than that of the pressurized water. So that the flow of compressed air is so much larger that even a flow cross-section, which the weaker electromagnet can release immediately, is sufficient to allow the quantity to flow quickly enough, which generates the desired movement of the valve body of the hydraulic valve by means of the pneumatic cylinder, and this itself at the lower pneumatic pressures of, for example, 2 to 6 bar and the correspondingly larger necessary volume of the cylinder.
  • the pressure reduction compared to the hydraulic pilot controls is partially compensated for by the fact that only smaller control forces are required and the flow cross-section in question can therefore be larger. Its diameter is, for example, 2 to 3 mm compared to the 0.8 mm mentioned above in the hydraulic pilot control. Otherwise, the actuating force required for the hydraulic valve can be limited in such a way that the hydraulic valve has a pressure-relieving design.
  • the invention even allows the advantageous embodiment and further development to feed the electromagnet with a battery which is arranged in the overall device in question, preferably on the hydraulic valve itself and only for this.
  • a button battery can be enough.
  • the effort for this consists of a particularly complex wiring of the thirty shields concerned with soldering or gold contacts to reduce contact resistance and with protective sheathing.
  • the electromagnet is controlled by frequency control, preferably audio frequency control, or by light control.
  • the frequency control has the advantage of an unlimited number of electromagnets individually in the scope under consideration or to be able to operate simultaneously.
  • the operation is not only possible as before, in neighborhood control, but also from the longwall.
  • a return can also be made through the same line notification of the execution of the tax act and a malfunction report. This means that all information can be forwarded to the surface without any major effort and that the shield removal of the entire pit can be monitored in detail at a control center.
  • the drawing shows an embodiment of the invention.
  • the hydraulic valve 1 has a valve body 3 in a valve housing 2.
  • the valve body 3 consists entirely of a piston rod 6 connecting two pistons 4 and 5 provided with sealing rings 35 and carrying a closure body 7.
  • the closure body 7 is a double-sided. It has a valve cone 9 or 10 on both sides of a cylindrical central section 8 and, following this, a turn cylindrical section 11 or 12.
  • the cylindrical sections 11 and 12 and the pistons 4 and 5 all have the same diameter.
  • valve seat 13 made of a soft plastic, such as polyacetate or polyamide or Teflon.
  • the valve seat 13 has matching counter surfaces to the valve cone 9 and the cylindrical section 11.
  • valve seat 13 separates between an inlet space 17 and an outlet space, the valve seat 14 between the outlet space 18 and a further outlet space 19.
  • the inlet space 17 is connected by radial bores 20 to an annular space 21 into which a connection (not shown) for the hydraulic medium leads.
  • the radial bores 20 and the annular space 21 are located in an insert sleeve 22 in which a cylinder space for the piston 4 is formed.
  • the outlet space 18 is connected by radial bores 23 to an annular space 24, from which an outlet, not shown, leads to the consumer.
  • the radial bores 23 and the annular space 24 are located in an insert sleeve 25; the annular space 24 is also partially recessed in the valve housing 2.
  • a return flow line 26 leads from the further outlet space 19 to a tank for the hydraulic fluid.
  • sealing rings can be seen, the function of which can be seen from their position.
  • a plunger 30 is directed against the return spring 29 on the piston 4 and is seated as a piston rod on a piston 32 arranged in a pneumatic cylinder 31 and provided with a sealing ring 40.
  • the pneumatic cylinder 31 is screwed axially to the valve housing 2 and secured by a lock nut 33.
  • a disk 34 forms its front end against the valve housing 2.
  • a spring 36 is arranged on the rear of the piston 32.
  • the pneumatic cylinder 31 On its other end face, the pneumatic cylinder 31 is screwed to an attachment part 37, in which a valve 38 and an electromagnet 39 are arranged.
  • the valve 38 is a piston valve.
  • a piston 42 is arranged in a cylindrical bore 41 of the attachment part 37. On the circumference, two annular spaces 43 and 44 are cut and each sealed by sealing rings 45. The annular space 43 is connected by radial bores 46 to an axial bore 47 which opens out on the end face of the piston 42 facing the pneumatic cylinder 31. The other annular space 44 is a dead space.
  • a compressed air connection 48 opens into the annular space 44, while a ventilation bore 49 leads from the annular space 43 to the outside.
  • a spring 50 holds the piston 42 in this position.
  • An axial bore 51 connects the cylindrical bore 41, i.e. the valve 38 with the pneumatic cylinder 31.
  • a coil 52 and a pot-shaped core 53 can be seen from the electromagnet 39, from which a plunger 54 projects through a seal 55 into the valve 38, where it presses on the piston 42 with the force of a spring 57 supported against a screw cap 56 .
  • the plunger 54 pushes the piston 42 with the annular space 43 in front of the compressed air connection 48.
  • the pneumatic cylinder 31 is then acted upon by the compressed air through the bores 46, 47 and 51.
  • Its plunger 30 displaces the valve body 3.
  • the closure body 7 changes from the valve seat 13 into the valve seat 14. Even before its cylindrical section 11 has left its counter surface in the valve seat 13, the cylindrical section 12 has entered its counter surface 16 in the valve seat 14. This prevents a breakdown of the hydraulic fluid from the inlet space 17 into the further outlet space 19 and the return flow line 26. Otherwise, the cylindrical sections 11 and 12 act as damping pistons; they avoid sudden movement of the valve body.
  • Hydraulic pressure 320 bar; smallest hydraulic flow cross-section: corresponding to circular cross-section with 10 mm diameter; pneumatic pressure: 4 bar; smallest pneumatic flow cross-section: corresponding to circular cross-section with 2.5 mm diameter; Pneumatic piston diameter 42: 22 mm.

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)
  • Magnetically Actuated Valves (AREA)

Claims (3)

1. Vanne hydraulique (1) destinée à l'industrie minière, notamment pour la commande à proximité dans le soutènement marchant, dont le corps de vanne (3) est mis en mouvement par un piston cylindrique (31) qui est commandé par une vanne (38) actionnée directement par un électro-aimant (39) intrinsèque caractérisée en ce que le piston cylindrique consiste en un cylindre pneumatique (31) et en ce que l'électro-aimant (39) fonctionne avec une intensité de courant inférieure à 280 mA.
2. Vanne hydraulique selon la revendication 1, caractérisée en ce que l'électro-aimant est alimenté par une batterie qui est agencée dans le dispositif concerné, de préférence sur ladite vanne hydraulique, et est destinée à celui-ci uniquement.
3. Vanne hydraulique selon la revendication 1 ou 2, caractérisée en ce que l'électro-aimant (39) est commandé par modulation de fréquence, de préférence par modulation de fréquence audible, ou par modulation de lumière.
EP86116351A 1985-11-27 1986-11-25 Soupape hydraulique pour l'industrie minière Expired - Lifetime EP0224242B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541870 1985-11-27
DE19853541870 DE3541870A1 (de) 1985-11-27 1985-11-27 Hydraulikventil fuer den bergbau

Publications (2)

Publication Number Publication Date
EP0224242A1 EP0224242A1 (fr) 1987-06-03
EP0224242B1 true EP0224242B1 (fr) 1990-01-10

Family

ID=6286951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116351A Expired - Lifetime EP0224242B1 (fr) 1985-11-27 1986-11-25 Soupape hydraulique pour l'industrie minière

Country Status (2)

Country Link
EP (1) EP0224242B1 (fr)
DE (2) DE3541870A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10112496B4 (de) * 2001-03-15 2004-09-30 Dbt Gmbh Ventilblock für elektrohydraulische Steuereinrichtung und Mehrwegventile hierfür
DE10314867B4 (de) * 2003-04-01 2008-11-13 Bucyrus Dbt Europe Gmbh Mehrstufiges Steuerventil insbesondere für den untertägigen Schildausbau und Schildausbau

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1598332A (en) * 1977-11-29 1981-09-16 Gewerk Eisenhuette Westfalia Hydraulic control units and valve assemblies usable therewith
DE3229835A1 (de) * 1982-08-11 1984-02-16 Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal Anordnung zum steuern eines elektro-hydraulischen ventils

Also Published As

Publication number Publication date
DE3541870A1 (de) 1987-06-04
DE3668217D1 (de) 1990-02-15
EP0224242A1 (fr) 1987-06-03

Similar Documents

Publication Publication Date Title
EP0681128B1 (fr) Electrovanne
DE3717341C2 (fr)
EP0845397B1 (fr) Régulateur de pression pour systèmes de freinage électropneumatiques pour véhicules, notamment véhicules utilitaires
EP0570406B1 (fr) Soupape a cartouche
DE3122961C2 (fr)
EP0893635B1 (fr) Dispositif d'électrovanne
DE2528873B2 (de) Sitzventil für die Druckmittelversorgung einer Arbeitseinheit
DE1576088A1 (de) Schnellentlastungsventil fuer hydraulische Kraftzylinder
DE3032336A1 (de) Doppel-sicherheitsventil fuer stanz-, praegepressen o.dgl.
DE3205228A1 (de) Mehrkreis-druckmittel-bremsanlage
EP0641919B1 (fr) Arrangement des clapets de sécurité
EP0654608B1 (fr) Procédé pour commander le mouvement d'un vérin à fluide et vérin à fluide
EP0433791A1 (fr) Actuateur pour une valve d'alimentation
DE1650574A1 (de) Elektromagnetisch betaetigbares Miniaturventil mit Tauchankermagnetsystem
EP0224242B1 (fr) Soupape hydraulique pour l'industrie minière
DE2008092C3 (de) Ventileinrichtung zur hydraulischen Blockierung
DE7637986U1 (de) Kraftbegrenzungsvorrichtung fuer eine feststellbremsbetaetigungseinrichtung
DE1750307B1 (de) Druckminderer
DE10004605A1 (de) Hydraulik-Logik-Kreuzkopplung zwischen getrennten Redundanten Servoaktuatoren
DE3625058A1 (de) Ventil
DE102004041776A1 (de) Vorrichtung zum wahlweisen Aus- bzw. Einrücken einer Reibkupplung für Kraftfahrzeuge
DE2113788B2 (de) Ventilumstellvorrichtung
EP1018460B1 (fr) Valve de protection pour plusieurs circuits pour installations de production d'air comprimé dans des véhicules
DE3736750C2 (fr)
DE1401300C3 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19871117

17Q First examination report despatched

Effective date: 19880928

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ECKER MASCHINENBAU GMBH & CO. KG

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19900110

REF Corresponds to:

Ref document number: 3668217

Country of ref document: DE

Date of ref document: 19900215

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19901125

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950111

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960801