US3746208A - Closure apparatus - Google Patents

Closure apparatus Download PDF

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Publication number
US3746208A
US3746208A US00093788A US3746208DA US3746208A US 3746208 A US3746208 A US 3746208A US 00093788 A US00093788 A US 00093788A US 3746208D A US3746208D A US 3746208DA US 3746208 A US3746208 A US 3746208A
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US
United States
Prior art keywords
pressure piece
pressure
conical member
housing
drive member
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 - Lifetime
Application number
US00093788A
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English (en)
Inventor
K Hotz
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Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
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Publication of US3746208A publication Critical patent/US3746208A/en
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C21/00—Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
    • G21C21/02—Manufacture of fuel elements or breeder elements contained in non-active casings
    • G21C21/08—Manufacture of fuel elements or breeder elements contained in non-active casings by a slip-fit cladding process by crimping the jacket around the fuel
    • 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

Definitions

  • ABSTRACT A closure apparatus is provided for passing materials therethrough into an opening of a chamber in which the pressure can range in value above or below atmospheric pressure and for sealing chamber pressure tight after the materials are placed therein.
  • the apparatus has a conical member having a longitudinal axis.
  • nuclears fuel rods are used in many instances and comprise envelope tubes having a length of several meters. Into these tubes must be placed the radioactive material which is in pellet form. The small tolerances existing between the outer diameter of the pellets and the inner diameter of the envelope tube inhibit the simple and fast introduction of the pellets into the tubes, because the air compressed in the tubes by the insertion action cannot escape between the pellets and inner wall of the envelope tube.
  • the envelope tubes are evacuated prior to insertion of the pellets.
  • each pellet stack is placed in turn into a chamber which together with the envelope tube connected with the latter is evacuated, so that a subsequent introduction of pellets into the envelope tube can be undertaken.
  • the apparatus according to the invention must provide an opening sufficiently large to permit the introduction of the pellet stacks as well as permit the chamber to be closed air-tight against the ambiant.
  • the invention relates to a closure apparatus for use of conjunction with the chamber in which the pressure can be above or below atmospheric pressure.
  • the closure apparatus is provided with a passage suitable for passing materials therethrough into an opening of a chamber and for sealing the chamber pressure tight after the materials are placed therein.
  • the conical member having a slot or passage extending therethrough is journalled in a housing so asto be rotatable therein to open and close positions whereat the slot is aligned with the opening of the chamber and the slot is closed with respect to the latter respectively.
  • the conical member is provided with a stud extending from the wider end of the latter and a pressure piece is positioned thereon in non-rotational engagement therewith as well as being slidably mounted thereon so as to be movable along the longitudinal axis of the conical member.
  • a spring is seated on the stud intennediate the aforementioned end of the conical member and the pressure piece for applying a pressure force against the latter.
  • a rotatable drive member engages the pressure piece the latter being provided with a cam surface for supporting the drive member in bearing relation thereagainst by the action of said spring.
  • the housing is provided with grooves extending in an arc corresponding to an angle of substantially 90 and the pressure piece has projections extending into these grooves respectively, so that the pressure piece and the conical member are rotatable by a rotation of the drive member through an angle up to the between the open and closed positions.
  • the cam surface is contoured to permit bearing the drive member thereon in a manner that renders the pressure piece movable along the longitudinal axis of the conical member and against the force of the spring, this action being in response to a continued rotation of the drive member past the closed position, whereby the conical member is seated and braced pressure-tight in the housing.
  • FIG. 1 is an elevation view, partially in section of a closure apparatus according to the invention
  • FIG. 2 is a cross-sectional view taken at line IIII of the right hand portion of the closure apparatus illustrated in FIG. 1.
  • the section view shows the protrusion on the pressure piece accommodated in grooves of the apparatus housing;
  • FIG. 3 is a cross-sectionalview taken at line III-III of the left hand portion of this closure apparatus illustrated in FIG. 1. The section view is taken through the drive portion of the apparatus and shows the follower rollers.
  • FIG. 4 illustrates a cross-section of the apparatus taken at line IVIV through the conical portion of the apparatus.
  • FIG. 5 illustrates a development of the control cam and the grooves of the housing in which the protrusions on the pressure piece are accommodated.
  • reference numeral 1 designates the housing 1 in which a conical pin member, 2 is rotatably journalled.
  • the pin member 2 has a longitudinal slot 3 having dimensions that permit passing therethrough the pellet stacks containing the pellets.
  • the pin member is journalled at its smaller end through the assistance of a bearing 5 that is acted upon by a spring 4.
  • the pin member is provided with a drive stud 6 upon which is seated a spring arrangement 7.
  • a pressure piece 8 is slidably mounted on stud 6 and is in shape-constrained (non-rotationable) engagement therewith.
  • the pressure piece 8 has two protrusions 9 positioned at respective locations from each other.
  • the protrusions 9 engage into grooves or slots 10 in the housing 1.
  • the grooves 10 occupy such a portion of the periphery of the housing 1 that the protrusions-9 and therewith the pressure piece 8, the stud- 6 and the pin member 2 joined thereto are all rotatable through an angle of 90.
  • rollers 12 Onthe left side of the pressure piece 8 there is provided a control cam 11 which is engaged by follower rollers 12. Rollers 12 are secured to a drive member 13 which is joined to an actuating shaft 14, the latter being similarly rotatably journalled in the housing I of the closure apparatus.
  • the housing I is provided with flanges l5 and 16 at both sides respectively as illustrated in FIG. 4.
  • One of these flanges is joined to the device that introduces the pellet stacks and the other flange is joined to the container receiving these stacks, the latter being evacuated after each introduction of these stacks.
  • the shape of the control cam and the relative position thereof to the protrusions 9 on the pressure piece 8 is illustrated in the projection of FIG. 5.
  • This drawing illustrates a drive member 13 with the rollers 12.
  • the movement of the protrusion 9 in the slots 10 of the housing 1 is likewise illustrated in FIG. 5. In viewing this drawing, the plane ofthe protrusions 9 with the grooves 10 must be considered as being displaced 90 with respect to the control cam 11.
  • the pellet stacks can be either inserted or removed and the two spaces which border on the flanges l5 and 16 communicate with each other.
  • the drive member 13 is also turned in the sense corresponding to a leftward movement of the rollers 12 in FIG. 5.
  • the rollers 12 are shown to lie in the illustrated position in respective recesses of the control cam 11, so that the pressure piece 8 moves likewise to the left. This movement causes a rotation of the pin member 2 in a counterclockwise direction.
  • the protrusion 9 lies on the other side of the slot 10 so that an additional turning is no longer possible. Should the drive member 13in FIG.
  • the described closure apparatus affords the decisive advantage over the known slider arrangements requiredto provide a pressure tight seal in that it affords a large space saving. This is especially true when it is considered that several closure apparatus according to the invention can be placed next to each other so that every other one of the apparatus is positioned so that its small side or small end is placed next to the large end of the next adjacent pin member. In this way, with minimal dimensioning, an optional use of the available space for construction is used and a complete sealing against the ambient is obtained with an easy movement of the apparatus.
  • Closure apparatus for passing materials therethrough into an opening of a chamber in which the pressure can range in value above and below atmospheric pressure and for sealing the chamber pressure tight after the materials are placed therein comprising a conical member having a longitudinal axis and having first and second ends of wide and narrow cross-section respectively, a housing dimensioned to accommodate said conical member, said conical member having a slot extending therethrough and being joumalled in said housing so as to be rotatable to open and closed positions whereat said slot is aligned with the opening of the chamber and said slot is closed with respect to the latter respectively, said conical member having a stud extending along -said axis from said first end, a pressure piece in non-rotational engagement with said stud and slidably mounted thereon so as to be movable along said axis, spring means seated on said stud intermediate said first end and said pressure piece for applying a pressure force against the latter, a rotatable drive member having bearing means for engaging said pressure piece, control cam means disposed on said
  • Closure apparatus comprising ancillary spring means disposed at said second end of said conical member for applying a force thereagainst in the direction along said axis.
  • said bean ing means being rollers rotatably mounted on said drive member to permit said rollers to be rolling contact with said cam means.
  • said first mentioned spring means being dimensioned to apply a force to said pressure piece which is less than the force exerted by said ancillary spring means on said conical member when said drive member is positioned in the angular range included by said open and closed positions, said first mentioned spring means being further dimensioned to apply a force to said pressure piece which is greater than the force exerted by said ancillary spring means on said conical member when said drive member is rotated past said closed position.
US00093788A 1969-12-04 1970-11-30 Closure apparatus Expired - Lifetime US3746208A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691960846 DE1960846A1 (de) 1969-12-04 1969-12-04 Absperrvorrichtung

Publications (1)

Publication Number Publication Date
US3746208A true US3746208A (en) 1973-07-17

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ID=5752958

Family Applications (1)

Application Number Title Priority Date Filing Date
US00093788A Expired - Lifetime US3746208A (en) 1969-12-04 1970-11-30 Closure apparatus

Country Status (4)

Country Link
US (1) US3746208A (fr)
BE (1) BE759095A (fr)
DE (1) DE1960846A1 (fr)
FR (1) FR2072863A5 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100104061A1 (en) * 2006-11-08 2010-04-29 Jean-Claude Argoud Device for the Transportation of Nuclear Fuel and Method for Loading/Unloading of the Said Device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392489A (en) * 1964-09-28 1968-07-16 Atomic Energy Authority Uk Pressure containing vessels

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392489A (en) * 1964-09-28 1968-07-16 Atomic Energy Authority Uk Pressure containing vessels

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100104061A1 (en) * 2006-11-08 2010-04-29 Jean-Claude Argoud Device for the Transportation of Nuclear Fuel and Method for Loading/Unloading of the Said Device
US8855260B2 (en) * 2006-11-08 2014-10-07 Commissariat A L'energie Atomique Device for the transportation of nuclear fuel and method for loading/unloading of the said device

Also Published As

Publication number Publication date
DE1960846A1 (de) 1971-06-09
BE759095A (fr) 1971-04-30
FR2072863A5 (fr) 1971-09-24

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