GB1145087A - Improvements in fluid pressure control systems - Google Patents

Improvements in fluid pressure control systems

Info

Publication number
GB1145087A
GB1145087A GB2111065A GB2111065A GB1145087A GB 1145087 A GB1145087 A GB 1145087A GB 2111065 A GB2111065 A GB 2111065A GB 2111065 A GB2111065 A GB 2111065A GB 1145087 A GB1145087 A GB 1145087A
Authority
GB
United Kingdom
Prior art keywords
valve
pressure
line
chamber
selector valve
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
GB2111065A
Inventor
William Francis Tristram
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.)
BONSER ENGINEERING Ltd
Original Assignee
BONSER 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 BONSER ENGINEERING Ltd filed Critical BONSER ENGINEERING Ltd
Priority to GB2111065A priority Critical patent/GB1145087A/en
Publication of GB1145087A publication Critical patent/GB1145087A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • 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
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (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)
  • Control Of Fluid Pressure (AREA)

Abstract

1,145,087. Hydraulic apparatus for controlling mine roof supports. BONSER ENG. Ltd. May 19, 1966 [May 19, 1965], No.21110/65. Heading F1P. A supply of pressurized fluid P1 is passed to a two-positioned selector valve 2 through a valve 1, of the type described in Specification 1,123, 831 (see Division F2), the valve 1 being adapted to provide a different output pressure in a line 5 depending on the position of the selector valve 2. The selector valve 2 may be connected by a line 7 to the extension chamber 3 of a mine roof support 15 and by a line 9 to the retraction chamber 4 thereof. To extend the support the selector valve is set to connect line 7 to the output line 5 so that pressure fluid flows through ports 13 in the valve 1, displaces a valve member 17 against a spring 19, and passes through the lines 5, 7 to the chamber 3. As the pressure builds up in the line 5 it acts on the surface 16 of the valve member 17 to close the valve and hence establish in the chamber 3 a pressure lower than the supply pressure P1. When the selector valve is changed over to pressurize the chamber 4 an annular chamber 20 of the valve 1 is also pressurized and the pressure acts to increase the pressure at which the valve 1 closes to that of e.g. the supply pressure P1.
GB2111065A 1965-05-19 1965-05-19 Improvements in fluid pressure control systems Expired GB1145087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2111065A GB1145087A (en) 1965-05-19 1965-05-19 Improvements in fluid pressure control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2111065A GB1145087A (en) 1965-05-19 1965-05-19 Improvements in fluid pressure control systems

Publications (1)

Publication Number Publication Date
GB1145087A true GB1145087A (en) 1969-03-12

Family

ID=10157395

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2111065A Expired GB1145087A (en) 1965-05-19 1965-05-19 Improvements in fluid pressure control systems

Country Status (1)

Country Link
GB (1) GB1145087A (en)

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