GB2005773A - Improvements in synchronising hydraulic control valves - Google Patents

Improvements in synchronising hydraulic control valves

Info

Publication number
GB2005773A
GB2005773A GB7835221A GB7835221A GB2005773A GB 2005773 A GB2005773 A GB 2005773A GB 7835221 A GB7835221 A GB 7835221A GB 7835221 A GB7835221 A GB 7835221A GB 2005773 A GB2005773 A GB 2005773A
Authority
GB
United Kingdom
Prior art keywords
hydraulic
rotor
synchronising
fluid
drum
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.)
Withdrawn
Application number
GB7835221A
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.)
Coles Cranes Ltd
Original Assignee
Coles Cranes 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 Coles Cranes Ltd filed Critical Coles Cranes Ltd
Publication of GB2005773A publication Critical patent/GB2005773A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
    • F15B15/165—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type with synchronisation of sections

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Jib Cranes (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

A hydraulic control valve for synchronising the advancement and retraction of two hydraulic actuators is described. The valve includes a rotor rotatable within a valve body and having interconnecting fluid passages for connecting inlet and outlet ports for hydraulic fluid for the actuators. The rotation of the rotor to control the flow of hydraulic fluid to or from the hydraulic actuators is brought about by means of a length of cable 17 one end of which passes around a recoil drum 16 joined to the rotor and the other end of which is linked to one or both of the hydraulic actuators 11, 12, so that when they advance or retract out of synchronism, cable pays off from or onto the drum so rotating the drum and rotor to modify the flow of fluid to or from the hydraulic actuators and restore them to synchronism. The arrangement is particularly useful in the actuation of telescoping jibs for cranes. <IMAGE>
GB7835221A 1977-08-31 1978-08-31 Improvements in synchronising hydraulic control valves Withdrawn GB2005773A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3638877 1977-08-31

Publications (1)

Publication Number Publication Date
GB2005773A true GB2005773A (en) 1979-04-25

Family

ID=10387692

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7835221A Withdrawn GB2005773A (en) 1977-08-31 1978-08-31 Improvements in synchronising hydraulic control valves

Country Status (6)

Country Link
JP (1) JPS5452279A (en)
DE (1) DE2838323A1 (en)
FI (1) FI782653A (en)
FR (1) FR2402093A1 (en)
GB (1) GB2005773A (en)
IT (1) IT1098800B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0882895A1 (en) * 1997-06-04 1998-12-09 Inventio Ag Device for synchronising telescopic actuators for hydraulic elevators
AU738755B2 (en) * 1997-06-04 2001-09-27 Inventio Ag Device for synchronisation of telescopic rams in hydraulic lifts
US8869916B2 (en) 2010-09-09 2014-10-28 National Oilwell Varco, L.P. Rotary steerable push-the-bit drilling apparatus with self-cleaning fluid filter
US9016400B2 (en) 2010-09-09 2015-04-28 National Oilwell Varco, L.P. Downhole rotary drilling apparatus with formation-interfacing members and control system
CN107559259A (en) * 2017-08-25 2018-01-09 中国水利水电科学研究院 Hydraulic control system and hinge dam assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131751A1 (en) * 1991-09-24 1993-03-25 Krupp Industrietech Telescopic jib for mobile crane - has four telescopic sections linked in pairs by cable and extended by two-stage differential cylinder
CN102052362A (en) * 2010-12-28 2011-05-11 太仓高德升降机有限公司 Synchronous hydraulic cylinder device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0882895A1 (en) * 1997-06-04 1998-12-09 Inventio Ag Device for synchronising telescopic actuators for hydraulic elevators
AU738755B2 (en) * 1997-06-04 2001-09-27 Inventio Ag Device for synchronisation of telescopic rams in hydraulic lifts
US6382080B1 (en) 1997-06-04 2002-05-07 Inventio Ag Apparatus for synchronization of telescopic rams in hydraulic elevators
US8869916B2 (en) 2010-09-09 2014-10-28 National Oilwell Varco, L.P. Rotary steerable push-the-bit drilling apparatus with self-cleaning fluid filter
US9016400B2 (en) 2010-09-09 2015-04-28 National Oilwell Varco, L.P. Downhole rotary drilling apparatus with formation-interfacing members and control system
US9476263B2 (en) 2010-09-09 2016-10-25 National Oilwell Varco, L.P. Rotary steerable push-the-bit drilling apparatus with self-cleaning fluid filter
CN107559259A (en) * 2017-08-25 2018-01-09 中国水利水电科学研究院 Hydraulic control system and hinge dam assembly

Also Published As

Publication number Publication date
FR2402093A1 (en) 1979-03-30
JPS5452279A (en) 1979-04-24
DE2838323A1 (en) 1979-03-08
FI782653A (en) 1979-03-01
IT1098800B (en) 1985-09-18
IT7827240A0 (en) 1978-08-31

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)