WO2009005361A1 - Verrou pour verrouillage axial d'une fixation de tige de piston reliant un vérin hydraulique au corps de ce vérin - Google Patents

Verrou pour verrouillage axial d'une fixation de tige de piston reliant un vérin hydraulique au corps de ce vérin Download PDF

Info

Publication number
WO2009005361A1
WO2009005361A1 PCT/NO2008/000227 NO2008000227W WO2009005361A1 WO 2009005361 A1 WO2009005361 A1 WO 2009005361A1 NO 2008000227 W NO2008000227 W NO 2008000227W WO 2009005361 A1 WO2009005361 A1 WO 2009005361A1
Authority
WO
WIPO (PCT)
Prior art keywords
lock
locking
retainer
hydraulic ram
piston rod
Prior art date
Application number
PCT/NO2008/000227
Other languages
English (en)
Inventor
Paul Taraldrud
Jarl BØHN
Original Assignee
National Oilwell Norway As
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 National Oilwell Norway As filed Critical National Oilwell Norway As
Publication of WO2009005361A1 publication Critical patent/WO2009005361A1/fr

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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions

Definitions

  • This invention relates to a lock for the axial locking of the piston rod coupling of a hydraulic ram to the body of the hydraulic ram. More particularly, it relates to a lock for the axial locking of at least the piston rod or the piston rod coupling of a hydraulic ram to the body of the hydraulic ram, the lock being arranged externally to the body, the lock including a locking body which is movable between an active position, in which the locking body engages a locking portion, and a passive position, in which the locking body is disengaged from the locking portion.
  • movable is meant in this connection both axially movable and rotatable.
  • the mechanical locking of the piston rod coupling of a hydraulic ram to the body of the hydraulic ram is necessary in some cases when maintenance is to be carried out or when it is necessary for the piston rod coupling to be in a fixed position relative to the body.
  • the invention has for its object to remedy or reduce at least one of the drawbacks of the prior art .
  • a lock according to the invention for the axial locking of at least the piston rod or piston rod coupling of a hydraulic ram to the body of the hydraulic ram, the lock being arranged externally to the body, is characterized by the lock being connected to the body and the piston rod coupling being provided with a locking portion, the lock including a locking body which is movable between an active position, in which the locking body engages the locking portion, and a passive position, in which the locking body is disengaged from the locking portion.
  • a retainer is movable between an active position, in which the retainer prevents the locking body from being moved away from its locking position, and a passive position, in which the retainer does not prevent the locking body from being moved away from its locking position.
  • the locking body is movably connected to the retainer, a movement of the retainer from its passive position towards its active position causing the locking body to be moved from its passive position into its active position, after which a further movement of the retainer carries the retainer into its active position.
  • a movement of the retainer from its active position towards its passive position will have the effect of carrying the retainer away from its active position, after which a further movement of the retainer in the same direction causes the locking body to be moved from its active position into its passive position.
  • the locking body which is in the lock housing of the lock bears on a shoulder in the lock housing. Tensile forces from the piston rod coupling, which can be formed in one piece of material with the piston rod, is thereby transmitted via the locking portion, the retainer and the lock housing to the body.
  • the lock typically includes a latch guide which is connected to the retainer, a latch body, connected to the locking body, extending in an elongated latching groove in the latch guide, at least part of the groove being formed by a portion which is oblique relative to the moving direction of the retainer.
  • the latch body rests against the oblique portion when the locking body is in its passive position.
  • the abutment of the latch body against the groove prevents the retainer from being moved away from its passive position without the locking body being moved in the direction of its active position.
  • the latch body is arranged to be visible, preferably on the outside of the lock, to enable visual checking of the positions of the locking body and retainer.
  • a lock according to the invention is well suited for use on hydraulic rams of a considerable size, the forces that arise being safely transmitted via the locking body and lock housing to the body.
  • the lock according to the invention can easily be formed in such a way that the relative positions of the locking body and retainer can be established visually.
  • Figure 1 shows in perspective an axial section of the lock according to the invention and also a section of an associated hydraulic ram, the piston rod coupling of the hydraulic ram being locked to the body of the hydraulic ram;
  • Figure 2 shows a plan view of locking bodies
  • Figure 3 shows a plan view of a retainer
  • Figure 4 shows an axial section of a lock and a section of an associated hydraulic ram, the sections being changed somewhat, for reasons of illustration, in relation to the section of figure 1, and the locking body of the lock being in its inactive position;
  • Figure 5 shows the same as figure 4, but here the retainer of the lock has been moved a distance, whereby the locking body has been brought to engage the locking portion of the piston rod coupling;
  • Figure 6 shows the same as figure 5, but here the retainer has been moved a further distance, whereby the retainer has been moved somewhat in between the locking body and the lock housing;
  • Figure 7 shows the same as figure 6, but here the retainer has been moved into its active position.
  • the reference numeral 1 indicates a lock which is connected to a hydraulic ram 2, the hydraulic ram 2 including a tubular portion 4 and an end cap 6, together forming a body 8.
  • the hydraulic ram 2 further includes a piston rod 10 with a piston rod coupling 12 mounted thereon. Necessary components, such as hydraulic ram attachment, piston seals and liquid ports are not shown.
  • the piston rod coupling 12 is connected to the piston rod 10 by means of a threaded connection 14, the locking portion 16 of the piston rod coupling 12 being tubular, surrounding the threaded connection 14.
  • the locking portion 12 is provided with two surrounding locking grooves 18.
  • the lock includes a lock housing 20 which is connected to the body 8 by means of bolts 22.
  • the lock housing 20 is provided with a through central opening 24 complementarily matching the locking portion 16.
  • a lock space 26 is formed by the opening 24 being reamed somewhat in the direction from the gable end 6 in to a shoulder 28.
  • a locking body 30, see figure 2 is placed in the lock space 26, bearing on the shoulder 28.
  • the locking body 30 surrounds, together with the other locking bodies 30, the locking portion 16 and is provided with beads 32 projecting radially inwards, complementarily matching the locking grooves 18.
  • the diameter of the lock space 26 is chosen to be such that the locking bodies 30 can be moved into their passive positions within the lock space 26.
  • Each of the locking bodies 30 is provided with a U-shaped latch body 34, see figure 2.
  • the latch bodies 34 project radially from the locking body 30 to the outside of the lock housing 20 through bores, not shown, when the locking body 30 has been fitted in the lock 1.
  • a sheave 36 is connected to the latch body 34.
  • the internal surface of the retainer 38 is somewhat conical, fitting complementariIy round the outside of the locking bodies 30 when the locking bodies 30 are in their active positions.
  • the retainer 38 is provided with four connection elements 40 projecting outwards, connecting the retainer to an actuating sleeve 42 surrounding the lock housing 20.
  • the connection elements 40 extend through their respective elongated, radial cut-outs 44 in the lock housing 20.
  • the connection elements 40 and their cut-outs 44 have been rotated 45 degrees about the longitudinal axis of the hydraulic ram 2 to illustrate better the operation of the lock 1.
  • Each latch guide 46 is provided with a latching groove 48 which has been given, at one end portion thereof, an oblique portion 50 extending outwards.
  • the latch bodies 34 extend through their respective latching grooves 48, the sheave 36 corresponding with a relatively small clearance to the latching groove 48.
  • the sheave 36 is in the oblique portion 50 when the corresponding locking body is in its passive position, see figure 4.
  • the locking bodies 30 are moved in the directions of their active positions, the sheave 36 rolling in the oblique portion 50 of the latching groove 48, while at the same time the retainer 38 is moved in the direction of the locking bodies 30, see figure 5.
  • the opening of the lock 1 is carried out by moving the actuating sleeve 42 in the opposite direction until the sheave 36 is in the end position within the oblique portion 50, whereby it can be established that the locking bodies 30 are in their respective inactive positions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Abstract

La présente invention concerne un verrou (1) destiné à verrouiller axialement une fixation de tige de piston (12) reliant un vérin hydraulique (2) au corps (8) de ce vérin hydraulique (2), le verrou (1) étant relié au corps (8) et la fixation de tige de piston (12) étant pourvue d'un élément de fixation (16). Le verrou (1) comprend un corps de verrouillage (30) qui peut se déplacer entre une position active (dans laquelle le corps de verrouillage (30) est engagé dans l'élément de verrouillage (16)), et une position passive (dans laquelle le corps de verrouillage (30) est désengagé de l'élément de verrouillage (16)).
PCT/NO2008/000227 2007-07-03 2008-06-20 Verrou pour verrouillage axial d'une fixation de tige de piston reliant un vérin hydraulique au corps de ce vérin WO2009005361A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20073412 2007-07-03
NO20073412A NO329856B1 (no) 2007-07-03 2007-07-03 Las for aksial lasing av en hydraulikksylinders stempelstangkopling til hydraulikksylinderens sylinderhus

Publications (1)

Publication Number Publication Date
WO2009005361A1 true WO2009005361A1 (fr) 2009-01-08

Family

ID=39745460

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2008/000227 WO2009005361A1 (fr) 2007-07-03 2008-06-20 Verrou pour verrouillage axial d'une fixation de tige de piston reliant un vérin hydraulique au corps de ce vérin

Country Status (2)

Country Link
NO (1) NO329856B1 (fr)
WO (1) WO2009005361A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768610A (en) * 1953-11-12 1956-10-30 Mead Specialties Company Inc Control mechanism for pressure fluid apparatus
DE19521783A1 (de) * 1994-07-13 1996-01-18 Hoerbiger Ventilwerke Ag Druckmittelbetätigbarer Arbeitszylinder
EP1669612A2 (fr) * 2004-12-09 2006-06-14 Bosch Rexroth Teknik AB Vérin avec système de verrouillage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3104593A (en) * 1960-12-28 1963-09-24 Regent Jack Mfg Co Inc Fluid actuators
US3196991A (en) * 1962-05-04 1965-07-27 Richard L Johnson Mast
JPS57127109A (en) * 1981-01-30 1982-08-07 Kyokuto Kaihatsu Kogyo Co Ltd Hydraulic cylinder
AUPQ786700A0 (en) * 2000-05-31 2000-06-22 Razorback Vehicles Corporation Limited A hydraulic or pneumatic cylinder
JP4185374B2 (ja) * 2003-01-29 2008-11-26 株式会社コガネイ 流体圧シリンダ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768610A (en) * 1953-11-12 1956-10-30 Mead Specialties Company Inc Control mechanism for pressure fluid apparatus
DE19521783A1 (de) * 1994-07-13 1996-01-18 Hoerbiger Ventilwerke Ag Druckmittelbetätigbarer Arbeitszylinder
EP1669612A2 (fr) * 2004-12-09 2006-06-14 Bosch Rexroth Teknik AB Vérin avec système de verrouillage

Also Published As

Publication number Publication date
NO20073412L (no) 2009-01-05
NO329856B1 (no) 2011-01-17

Similar Documents

Publication Publication Date Title
EP2100000B1 (fr) Connecteur
GB2471942A (en) Dog-type lockout and position indicator assembly
CN105605357B (zh) 包括改进的滚珠轴承的快速联结器
CN102563064A (zh) 深海耐压圆口法兰对接锁死解脱装置
US11821278B2 (en) Release lugs for a jarring device
US6907932B2 (en) Control pod latchdown mechanism
GB2186650A (en) Grip and seal mechanically locking flowline connector
US10202815B2 (en) Release lugs for a jarring device
US7066103B2 (en) Anchoring device
US10065265B2 (en) Joined body
WO2009005361A1 (fr) Verrou pour verrouillage axial d'une fixation de tige de piston reliant un vérin hydraulique au corps de ce vérin
US9752415B2 (en) Insertion and setting structure
RU167061U1 (ru) Переводник гидравлический
US10830260B2 (en) Lockable linear actuator with a locking indicator
CN103708023A (zh) 中间自锁式舱门撑杆
US9803446B2 (en) Lockdown mechanism and lockdown system for wellhead connector
US3106416A (en) Safety hook for drilling apparatus
EP2673233A1 (fr) Connecteur pouvant être déclenché par surcharge
JP2016070284A (ja) 管継手装置
GB2495784A (en) Clamping device for remote connectors
NO347830B1 (en) Guide rod
CN112590723A (zh) 一种支腿锁止机构、工程机械及控制方法
AU2013200314A1 (en) Pin-type coupling devices

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08766938

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08766938

Country of ref document: EP

Kind code of ref document: A1