GB1111660A - Improvements relating to roof support units - Google Patents

Improvements relating to roof support units

Info

Publication number
GB1111660A
GB1111660A GB4921863A GB4921863A GB1111660A GB 1111660 A GB1111660 A GB 1111660A GB 4921863 A GB4921863 A GB 4921863A GB 4921863 A GB4921863 A GB 4921863A GB 1111660 A GB1111660 A GB 1111660A
Authority
GB
United Kingdom
Prior art keywords
pressure
ram
prop
valves
support
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
GB4921863A
Inventor
Bertie George Parkins
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.)
WFEL Ltd
Original Assignee
Fairey Engineering 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
Application filed by Fairey Engineering Ltd filed Critical Fairey Engineering Ltd
Priority to GB4921863A priority Critical patent/GB1111660A/en
Priority to NL6414456A priority patent/NL6414456A/xx
Priority to BE657029A priority patent/BE657029A/xx
Priority to FR998410A priority patent/FR1417073A/en
Publication of GB1111660A publication Critical patent/GB1111660A/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
    • 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
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means

Abstract

1,111,660. Advancing mine roof supports. FAIREY ENGINEERING Ltd. Dec. 11, 1964 [Dec.12, 1963], No.49218/63. Heading F1P. In a self-advancing hydraulic roof support comprising a front support prop 10, a rear support prop 11, and a ram 12 for moving one prop relative to the other, the sequence of operations for automatically advancing the support is controlled by valves 14, 15, 16 having solenoids 20-23 energized by an electrical circuit Fig. 2, comprising pressure responsive switches 40, 41, 42, 50, 51, 52 arranged to operate at the conclusion of a step in the sequence to initiate the next step. The pressure switches are adapted to close when the associated ram reaches the limit of its travel or when a predetermined ram pressure is reached. The prop 10, 11 and ram 12 are each connected to a pressure line 18 and a return line 17 through respective valves 14, 15, 16. Each valve includes a solenoid operated pilot valve, a main valve controlled thereby and non- return valves 24, 25 for maintaining the pressure in the ram and props in the event of a failure in the pressure line. The electrical circuit comprises four relays 30-32 controlling respectively the energization of the solenoids 20-23 through throttle opening piston 45 is temporarily depressed to close pipe 19, being subsequently raised by spring 46.
GB4921863A 1963-12-12 1963-12-12 Improvements relating to roof support units Expired GB1111660A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB4921863A GB1111660A (en) 1963-12-12 1963-12-12 Improvements relating to roof support units
NL6414456A NL6414456A (en) 1963-12-12 1964-12-11
BE657029A BE657029A (en) 1963-12-12 1964-12-11
FR998410A FR1417073A (en) 1963-12-12 1964-12-12 Supporting device walking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4921863A GB1111660A (en) 1963-12-12 1963-12-12 Improvements relating to roof support units

Publications (1)

Publication Number Publication Date
GB1111660A true GB1111660A (en) 1968-05-01

Family

ID=10451584

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4921863A Expired GB1111660A (en) 1963-12-12 1963-12-12 Improvements relating to roof support units

Country Status (3)

Country Link
BE (1) BE657029A (en)
GB (1) GB1111660A (en)
NL (1) NL6414456A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550830A1 (en) * 1983-08-19 1985-02-22 Pernaton Andre Remote electrical and independent control of hydraulic systems in an explosive atmosphere

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550830A1 (en) * 1983-08-19 1985-02-22 Pernaton Andre Remote electrical and independent control of hydraulic systems in an explosive atmosphere

Also Published As

Publication number Publication date
BE657029A (en) 1965-04-01
NL6414456A (en) 1965-06-14

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