ES478021A1 - Mine roof support hydraulic control system - has cylinder operated by main valve and low pressure operated changeover valve - Google Patents

Mine roof support hydraulic control system - has cylinder operated by main valve and low pressure operated changeover valve

Info

Publication number
ES478021A1
ES478021A1 ES478021A ES478021A ES478021A1 ES 478021 A1 ES478021 A1 ES 478021A1 ES 478021 A ES478021 A ES 478021A ES 478021 A ES478021 A ES 478021A ES 478021 A1 ES478021 A1 ES 478021A1
Authority
ES
Spain
Prior art keywords
cylinder
valve
control system
low pressure
hydraulic control
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
Application number
ES478021A
Other languages
Spanish (es)
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.)
Gewerkschaft Eisenhutte Westfalia GmbH
Original Assignee
Gewerkschaft Eisenhutte Westfalia 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 Gewerkschaft Eisenhutte Westfalia GmbH filed Critical Gewerkschaft Eisenhutte Westfalia GmbH
Publication of ES478021A1 publication Critical patent/ES478021A1/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D23/26—Hydraulic or pneumatic control
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D23/03—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support

Abstract

The mine system includes two roof members with angle shaped end members to close the gap between them, and also an adjacent unit. The travel of each end member is controlled by a hydraulic cylinder parallel with the roof member. Each cylinder is in turn controlled by a valve arrangement. A line connects these valves with the chamber of the cylinder, and the changeover valve is connected to a supply line at a lower pressure than the pressure required to operate the cylinder. This valve operates automatically in response to the load on the cylinder. The other valve is the operating valve, connecting the high pressure supply to the cylinder.
ES478021A 1978-02-25 1979-02-23 Mine roof support hydraulic control system - has cylinder operated by main valve and low pressure operated changeover valve Expired ES478021A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782808205 DE2808205C2 (en) 1978-02-25 1978-02-25 Hydraulic control for a gap cover arranged on the cap or on the breakage shield of a walking support

Publications (1)

Publication Number Publication Date
ES478021A1 true ES478021A1 (en) 1979-12-01

Family

ID=6032957

Family Applications (1)

Application Number Title Priority Date Filing Date
ES478021A Expired ES478021A1 (en) 1978-02-25 1979-02-23 Mine roof support hydraulic control system - has cylinder operated by main valve and low pressure operated changeover valve

Country Status (5)

Country Link
CS (1) CS219345B2 (en)
DE (1) DE2808205C2 (en)
ES (1) ES478021A1 (en)
FR (1) FR2418329A1 (en)
PL (1) PL119297B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010026977B4 (en) * 2010-07-13 2016-06-02 Marco Systemanaslyse Und Entwicklung Gmbh Method for shield control

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6414602A (en) * 1963-12-24 1965-06-25
GB1117312A (en) * 1964-10-16 1968-06-19 Coal Industry Patents Ltd Self advancing roof supports in inclined mineral seams
HU162717B (en) * 1971-03-05 1973-04-28
GB1512001A (en) * 1974-01-19 1978-05-24 Dowty Mining Equipment Ltd Mine roof support

Also Published As

Publication number Publication date
PL119297B1 (en) 1981-12-31
PL213644A1 (en) 1979-11-19
FR2418329A1 (en) 1979-09-21
DE2808205C2 (en) 1985-10-10
CS219345B2 (en) 1983-03-25
DE2808205A1 (en) 1979-09-06
FR2418329B1 (en) 1983-05-27

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