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GB693038A - Improvements relating to hydraulic pit props - Google Patents

Improvements relating to hydraulic pit props

Info

Publication number
GB693038A
GB693038A GB819650A GB819650A GB693038A GB 693038 A GB693038 A GB 693038A GB 819650 A GB819650 A GB 819650A GB 819650 A GB819650 A GB 819650A GB 693038 A GB693038 A GB 693038A
Authority
GB
United Kingdom
Prior art keywords
prop
valve
pin
pressure
arm
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
GB819650A
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 GB693038A publication Critical patent/GB693038A/en
Expired legal-status Critical Current

Links

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
    • E21D15/58—Devices for setting props or chocks
    • 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
    • E21D15/002—Auxiliary devices in which the prop type is not essential
    • 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
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • 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
    • E21D15/517—Extension elements
    • 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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • 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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
    • 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
    • E21D15/60—Devices for withdrawing props or chocks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87917—Flow path with serial valves and/or closures
    • Y10T137/87925—Separable flow path section, valve or closure in each
    • Y10T137/87965—Valve- or closure-operated by coupling motion

Landscapes

  • 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)
  • Press Drives And Press Lines (AREA)
  • Earth Drilling (AREA)

Abstract

693,038. Pit props. GEWERKSCHAFT EISENHUTTE WESTFALIA. March 31, 1950 [April 7, 1949; Oct. 24, 1949], No. 8196/50. Class 20(ii) [Also in Groups XXVIII and XXX] A hydraulic pit prop has a charging and discharging valve 23, Fig. 3, and an excess pressure valve 24, charging being effected through a hose 15 terminating in a connecting member 30 in the form of a lever which is coupled by means of a hook 31 to a handle 26 on the prop, so that pressure on the long tubular lever arm 32 forces the short arm end 35 and pressure pin 34 against the inlet opening of the valve 23 thereby conveying water through the arm 32 and outlet tube 33 into the prop without any screwing action being necessary. Discharge is effected simultaneously with the knocking down of the prop by means of a chain 51, Fig 4, linked to a lever 46 hooked on to the handle 26 and carrying a pressure pin 49 which, on pulling the chain, opens the valve 23. The valve 23, Fig. 3, comprises a sprung ball 27 closing the inlet which has externally a conically flared surface adapted to make a sealing fit with the short lever arm packing cone 35 surrounding the outlet tube 33 which terminates in the pressure pin 34. The connecting member 30 also contains a supply valve 37 which is opened by a striker pin 40 upon moving a handle grip 38 in the direction of the arrow 39. The length of the pin 34 is such that on setting a prop which requires to be shortened, a slight depression of the lever arm 32 causes the pin 34 to open the valve 23 before the packing cone 35 comes to rest on the flared inlet, thus releasing water from the prop. After positioning of the prop, further depression of the arm 32 and operation of the supply valve 37 then causes water to enter the prop when the connecting member 30 is unhooked and used for setting up another prop. Damage to the prop is prevented by the relief valve 24, the valve body 43 of which under the loading of a spring 44, closes a small opening 45 on the outside, the spring 44 being loaded to the maximum load of the prop. In a roof support system, Fig. 1, (not shown), the props 14 are arranged in "saw-tooth" formation and are set up in sequence by connecting them by means of the pressure hose 15 to coupling points 17 on piping 16 extending alongside the conveyer 12 and supplied by an electrically or compressed air operated pump 18.
GB819650A 1949-04-07 1950-03-31 Improvements relating to hydraulic pit props Expired GB693038A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP39236A DE830181C (en) 1949-04-07 1949-04-07 Hydraulic pit ram and device for setting and stealing the same

Publications (1)

Publication Number Publication Date
GB693038A true GB693038A (en) 1953-06-24

Family

ID=6603986

Family Applications (1)

Application Number Title Priority Date Filing Date
GB819650A Expired GB693038A (en) 1949-04-07 1950-03-31 Improvements relating to hydraulic pit props

Country Status (6)

Country Link
US (1) US2816728A (en)
BE (1) BE495010A (en)
DE (1) DE830181C (en)
FR (2) FR989335A (en)
GB (1) GB693038A (en)
NL (2) NL73035C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061271B (en) * 1957-11-15 1959-07-16 Tecalemit Ges M B H Deutsche Filling valve for hydraulic pit rams

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1010032B (en) * 1955-02-14 1957-06-13 Dobson Ltd W E & F Support device
DE1043252B (en) * 1956-04-27 1958-11-13 Guenther W Hammer Base plate for pit stamp
US2961839A (en) * 1956-08-28 1960-11-29 Fausto A Aresti Hydraulic compression member
US3148714A (en) * 1959-09-28 1964-09-15 Dowty Mining Equipment Ltd Liquid charging devices for hydraulic pit props
CN103224205B (en) * 2013-04-01 2015-09-23 永城煤电控股集团有限公司 Chain block jacking system
CN106499421B (en) * 2016-11-03 2019-01-08 中国矿业大学 A kind of mechanical constant-resistance individual prop withdrawing technique and recovery method
CN114017051B (en) * 2021-10-11 2023-10-20 煤炭科学研究总院有限公司 Bracket mounting vehicle

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1208162A (en) * 1915-03-25 1916-12-12 Henry Jungjohann Pressure-recording valve.
US1544777A (en) * 1923-12-10 1925-07-07 Harry B Robinson Air coupling for pipe and hose lines
DE574822C (en) * 1931-04-19 1933-04-20 Dorstener Drahtwerke H W Brune Resilient pit stamp
GB453560A (en) * 1935-05-27 1936-09-14 Wilhelm Fehlemann Yieldable prop for mines
US2247843A (en) * 1937-01-18 1941-07-01 Italiana Magneti Marelli Socie Conduit coupling
BE482083A (en) * 1947-04-24
GB636568A (en) * 1953-07-20 1950-05-03 George Herbert Dowty Improvements in pit props and other telescopic struts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061271B (en) * 1957-11-15 1959-07-16 Tecalemit Ges M B H Deutsche Filling valve for hydraulic pit rams

Also Published As

Publication number Publication date
BE495010A (en) 1950-08-01
FR989335A (en) 1951-09-11
FR59692E (en) 1954-06-29
DE830181C (en) 1952-03-27
US2816728A (en) 1957-12-17
NL73035C (en) 1953-08-15
NL152226B (en)

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