GB874789A - Improvements in or relating to grabs for operating in long and narrow vertical bores - Google Patents

Improvements in or relating to grabs for operating in long and narrow vertical bores

Info

Publication number
GB874789A
GB874789A GB37452/58A GB3745258A GB874789A GB 874789 A GB874789 A GB 874789A GB 37452/58 A GB37452/58 A GB 37452/58A GB 3745258 A GB3745258 A GB 3745258A GB 874789 A GB874789 A GB 874789A
Authority
GB
United Kingdom
Prior art keywords
piston
spring
steam
claws
grab
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
GB37452/58A
Inventor
Norman Bradley
Jack Jones
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB37452/58A priority Critical patent/GB874789A/en
Priority to US852539A priority patent/US3039811A/en
Priority to DEU6645A priority patent/DE1167503B/en
Priority to FR810683A priority patent/FR1240960A/en
Publication of GB874789A publication Critical patent/GB874789A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
    • G21C19/02—Details of handling arrangements
    • G21C19/10—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements
    • G21C19/105—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements with grasping or spreading coupling elements
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
    • G21C19/02—Details of handling arrangements
    • G21C19/10—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S294/00—Handling: hand and hoist-line implements
    • Y10S294/906—Atomic fuel handler

Abstract

874,789. Lifting devices for handling articles. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Nov. 9, 1959 [Nov. 20, 1958], No. 37452/58. Class 78 (4). [Also in Group XL (a)] A grab for lifting fuel elements from channels in the core of a steam-cooled nuclear reactor comprises a cylindrical body 1 receiving a piston 3 supported by coaxial flexible tubes 10, 11 the piston being biased by a spring 7 against a stop ring 4 secured to the body 1 and the body 1 having a continuous bleed orifice 18. A shaft 15 attached to the piston 3 has a central bore 21 communicating with the tube 10 and carries pairs of lugs 14 having pivot pins 13 supporting three equispaced claws 12, slots 16<SP>1</SP> in the claws co-operating with pins 16 carried by lugs 17 integral with the body 1. The lower end of the shaft 15, Fig. 3, contains a tapering probe 24 biased against a valve seat 23 by a spring 26, and the lower end slidably supports a locating nose 29 biased by a spring 31 against a stop washer 28 secured to the shaft end. The tubes 10, 11 are wound over a hoist drum W, the tube 10 and annular space 11<SP>1</SP> between the tubes 10, 11 being connected to a steam condenser C. When using the grab to remove a fuel element, a valve 33 is opened to create a partial vacuum in the space enclosed by the piston and cylinder 3, 1 whereby the body 1 moves upwards due to the ambient steam pressure the lugs 17 moving the claws 12 to the open position and the spring 7 being compressed. The grab is lowered so that the end of the fuel element 29<SP>1</SP> is received -within the nose 29, further downward movement causing movement of the nose 29 on the shaft 15 and the probe 24 is lifted off its seat 23 by the element 291. A steam flow path is thus established through the bore 21 and tube 10 the steam pressure being indicated by an instrument 34 to provide a warning signal to the grab operator. The steam bleeding through orifice 18 is continuously evacuated to the condenser C. The valve 33 is now shut so that the pressure within the piston and cylinder builds up and eventually the spring 7 moves the body 1 downwards relatively to the piston and the claws 12 close upon the element 29<SP>1</SP>. A passageway 19 leading to the exterior of the body 1 is then in alignment with a passageway 20 leading to the bore 21 whereby a further warning is given to the operator by the instrument 34.
GB37452/58A 1958-11-20 1958-11-20 Improvements in or relating to grabs for operating in long and narrow vertical bores Expired GB874789A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB37452/58A GB874789A (en) 1958-11-20 1958-11-20 Improvements in or relating to grabs for operating in long and narrow vertical bores
US852539A US3039811A (en) 1958-11-20 1959-11-12 Lifting devices
DEU6645A DE1167503B (en) 1958-11-20 1959-11-17 Gripping device
FR810683A FR1240960A (en) 1958-11-20 1959-11-19 Lifting clamp for atomic cell fuel cartridges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37452/58A GB874789A (en) 1958-11-20 1958-11-20 Improvements in or relating to grabs for operating in long and narrow vertical bores

Publications (1)

Publication Number Publication Date
GB874789A true GB874789A (en) 1961-08-10

Family

ID=10396584

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37452/58A Expired GB874789A (en) 1958-11-20 1958-11-20 Improvements in or relating to grabs for operating in long and narrow vertical bores

Country Status (4)

Country Link
US (1) US3039811A (en)
DE (1) DE1167503B (en)
FR (1) FR1240960A (en)
GB (1) GB874789A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3121583A (en) * 1962-10-26 1964-02-18 Carl A Damm Connector aligning device
US3319992A (en) * 1965-02-17 1967-05-16 Fairey Eng Grabs
FR2484684A1 (en) * 1980-06-12 1981-12-18 Framatome Sa DEVICE FOR CLEARING A NUCLEAR REACTOR COMBUSTIBLE ELEMENT FROM AN ARTICULATED FINGER GRAPPLE AND METHOD OF USING THE SAME
US4591007A (en) * 1983-02-22 1986-05-27 Spetsialnoe Konstruktorskoe Bjuro Seismicheskoi Tekhniki Well tubing handling apparatus
GB2149947B (en) * 1983-11-16 1987-09-23 Systech Limited Control systems
DE3433311A1 (en) * 1984-09-11 1986-03-20 C. & E. Fein Gmbh & Co, 7000 Stuttgart TOOL CHANGE DEVICE FOR INDUSTRIAL ROBOTS
DE9000260U1 (en) * 1989-05-12 1990-06-21 Kinshofer Greiftechnik Gmbh, 8160 Miesbach, De
NO313003B1 (en) * 2000-05-19 2002-07-29 Knut Ove Steinhovden Buoy-triggerable mechanical coupling

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR345767A (en) * 1904-08-23 1904-12-15 Nicolas Savon Dredger for loading and unloading any material deposited in bulk
US2118991A (en) * 1934-09-04 1938-05-31 Lane Wells Co Electrohydraulic fishing tool
US2457834A (en) * 1945-10-25 1949-01-04 Howard E Ricketson Control device for vacuum cylinders
US2494124A (en) * 1946-09-30 1950-01-10 Bendix Aviat Corp Alarm initiator for pumping systems
FR1100825A (en) * 1953-11-21 1955-09-26 Improvements to high power lifting devices actuated by gas expansion
US2863287A (en) * 1956-11-09 1958-12-09 Research Corp Vacuum control system

Also Published As

Publication number Publication date
US3039811A (en) 1962-06-19
FR1240960A (en) 1960-09-09
DE1167503B (en) 1964-04-09

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