GB860761A - Improvements in hydraulic valves - Google Patents

Improvements in hydraulic valves

Info

Publication number
GB860761A
GB860761A GB2824757A GB2824757A GB860761A GB 860761 A GB860761 A GB 860761A GB 2824757 A GB2824757 A GB 2824757A GB 2824757 A GB2824757 A GB 2824757A GB 860761 A GB860761 A GB 860761A
Authority
GB
United Kingdom
Prior art keywords
valve
main valve
closed
pressure
auxiliary
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
GB2824757A
Inventor
John James Wilson
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment Ltd
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
Priority to BE571005D priority Critical patent/BE571005A/xx
Application filed by Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Priority to GB2824757A priority patent/GB860761A/en
Priority to FR1211633D priority patent/FR1211633A/en
Publication of GB860761A publication Critical patent/GB860761A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
    • 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
    • E21D15/512—Arrangement of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/168—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side combined with manually-controlled valves, e.g. a valve combined with a safety valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Safety Valves (AREA)

Abstract

860,761. Valves. DOWTY MINING EQUIPMENT Ltd. Sept. 5, 1958 [Sept. 6, 1957], No. 28247/57. Class 135. A valve arrangement for an hydraulic pit prop comprises an auxiliary valve and a main valve arranged to be opened in succession with lost motion between them by a unidirectional pull on a wire, the auxiliary valve, when opened, serving to reduce liquid pressure normally keeping the main valve closed and also capable of serving as a relief valve to open automatically at a predetermined pressure. The spring- closed main valve member 12 is slidable in a cylinder 8, of larger cross-sectional area than the seating 9, so that high pressure liquid trapped between the piston head and ram tube B acts via axial bore 17 on the top face of the valve member to maintain it closed. The spring-closed auxiliary valve 23 is actuated with lost motion through screw 33 and coupling 32 by a pull wire 27 to relieve pressure above the main valve member and enable it to open under the resultant liquid pressure differential to exhaust liquid through ports 11. The auxiliary valve may also act in the manner described in Specification 753,532 as a relief valve. If the ram is not under pressure the main valve will not operate as described above and to enable it to be moved the main valve may be opened directly, with lost motion, by the pull wire by virtue of a guiding stem 18 of the auxiliary valve being fitted with an enlarged end piece 21 which is adapted to engage a projection 22 on the main valve member.
GB2824757A 1957-09-06 1957-09-06 Improvements in hydraulic valves Expired GB860761A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE571005D BE571005A (en) 1957-09-06
GB2824757A GB860761A (en) 1957-09-06 1957-09-06 Improvements in hydraulic valves
FR1211633D FR1211633A (en) 1957-09-06 1958-09-05 Hydraulic valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2824757A GB860761A (en) 1957-09-06 1957-09-06 Improvements in hydraulic valves

Publications (1)

Publication Number Publication Date
GB860761A true GB860761A (en) 1961-02-08

Family

ID=10272657

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2824757A Expired GB860761A (en) 1957-09-06 1957-09-06 Improvements in hydraulic valves

Country Status (3)

Country Link
BE (1) BE571005A (en)
FR (1) FR1211633A (en)
GB (1) GB860761A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106931200A (en) * 2017-03-08 2017-07-07 佛山市昌达业自动化科技有限公司 Ultra-high-pressure hand pressure relief device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9011887U1 (en) * 1990-08-16 1990-12-20 Maschinenfabrik Jörn Dams GmbH, 4320 Hattingen Telescopic length-adjustable hydraulic pit ram

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106931200A (en) * 2017-03-08 2017-07-07 佛山市昌达业自动化科技有限公司 Ultra-high-pressure hand pressure relief device
CN106931200B (en) * 2017-03-08 2023-03-14 佛山市昌达业自动化科技有限公司 Ultrahigh pressure manual pressure relief device

Also Published As

Publication number Publication date
BE571005A (en)
FR1211633A (en) 1960-03-17

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