US3889438A - Lattice construction - Google Patents

Lattice construction Download PDF

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Publication number
US3889438A
US3889438A US238286A US23828672A US3889438A US 3889438 A US3889438 A US 3889438A US 238286 A US238286 A US 238286A US 23828672 A US23828672 A US 23828672A US 3889438 A US3889438 A US 3889438A
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US
United States
Prior art keywords
strip
lattice
strips
lip
edge
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
US238286A
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English (en)
Inventor
Gijsbrecht Gerhardus Piepers
Christiaan Gustaaf Ad Scholtus
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.)
Reactor Centrum Nederland
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Reactor Centrum Nederland
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Filing date
Publication date
Application filed by Reactor Centrum Nederland filed Critical Reactor Centrum Nederland
Priority to US05/450,863 priority Critical patent/US4007899A/en
Application granted granted Critical
Publication of US3889438A publication Critical patent/US3889438A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
    • G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
    • G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
    • G21C3/34—Spacer grids
    • G21C3/356—Spacer grids being provided with fuel element supporting members
    • G21C3/3566—Supporting members formed only of elements fixed on the strips
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/42—Gratings; Grid-like panels
    • E04C2/421—Gratings; Grid-like panels made of bar-like elements, e.g. bars discontinuous in one direction
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7001—Crossed rods

Definitions

  • ABSTRACT Lattice especially for supporting sideways a bunch of nuclear fuel rods, constructed according to the egg crate principle, in which fixing lips of alternating different lengths are stamped and bend out of the bands and cross bands from which the lattice is composed, and are spotwelded to these bands.
  • the invention offers a construction method consisting of a simple welding process, needing only very few different parts.
  • Bands and cross bands are of the same shape. Stiff spacer lips may be stamped out of a thicker part of the bands, making them suitable for tip contour forming by grinding or spark erosion.
  • the invention relates to a lattice specially adapted to support a bunch of elongated components participating in a heatexchange process, which lattice is made up of comb-like strips or bands in such a way as to form compartments surrounded by intersecting bands which, having comb-like incisions positioned halfway over the band, engage each other in the manner of bands and cross-bands.
  • a lattice of this kind is therefore executed in such a way that the edges of these bands are provided on either side with fixing lips bent into the plane of the lattice and stamped out of the edge of the band, by means of which fixing lips the intersecting bands are fixed to each other.
  • the most expedient fixing is obtained in that the fixing of a lip to a crossband is effected by means of the spot welding process.
  • the lips are made longer at one edge of the comb strip than the lips situated at the other edge.
  • the comb strips produced in this way are of such a form that the same kind of strip will serve for all the bands that are positioned in the interior of a lattice.
  • Assembly is effected in that at least two sets of mutually parallel comb strips are slid into each other in such a way that the comb strips of one set (all of which run parallel to each other per set) are in opposite orientation with respect to the comb strips of the other set.
  • the long. outwardly bent lips are at the top edge, whilst in the other set they are at the bottom edge of the strip.
  • one set of parallel bands in the half that is divided by comb-like incisions has a thickened part extending in the longitudinal direction of the band over the breadth area that is used respectively for stamping out the extension lips and for bending them outwards, so that these lips are thicker than the thickness of the cross-bands.
  • plate springs of the multi-arched type For clamping the fissile rods use is made of plate springs of the multi-arched type. This kind of plate spring has a spring characteristic which brings about a very constant and even pressure which is practically independent of the degree of impression.
  • FIGS. 1, 2, 3 an illustration in perspective of two intersecting bands as seen when assembled (FIG. 3) and when taken apart (FIGS. 1 and 2).
  • FiG. 4 a side view of a comb strip having outwardly bent extension lips.
  • FIG. 4a a top view of the comb strip of FIG. 4
  • FIG. 5 a side view of a comb strip without extension lips.
  • FIG. 5a a top-plan view of the comb strip of FIG. 5.
  • FIG. 6 a top-plan view of a lattice according to the invention.
  • FIG. 7 a side view according to VII of the lattice of FIG. 6.
  • FIG. 8 a side view according to VIII of the lattice of FIG. 6.
  • FIG. 9 a side view of an amazon spring
  • FIG. 9a a vertical cross-section of the amozon spring of FIG. 9
  • FIG. 10 a vertical cross-section of a lattice call of the asymmetrical type.
  • FIG. 11 a top-plan view of the lattice call of FIG. 10.
  • FIG. 1 illustrates a part of a cross-band l as constructed at the point at which it intersects another cross-band 2 (see FIG. 2).
  • the cross-bands hereinafter also termed comb strips, are provided with long, outwardly bent lips 3 and with short, outwardly bent lips 4. Lips 3 and 4 are in each case positioned on oppositely situated edges 5 and 6 respectively of the comb strip and are also bent outwards in different directions.
  • the long strip 3, when bent outwards, produces a cavity 7, whilst at the short strip a cavity 8 is formed. Start ing from this cavity 8 and incision 9 is provided in the comb strip, this incision being of such a breadth that the other comb strip 2 fits exactly into it.
  • FIG. 2 has fundamentally the same shape as the comb strip of FIG. 1 but is in an inverted position as compared with 1.
  • FIG. 3 shows that it is possible to make the comb strips of FIGS. 1 and 2 fit into each other by moving strip 1 downwards over the comb strip 2.
  • an attachment surface I is formed between the inner side 11 of lip 3 and part I2 on strip 2.
  • a second fixing position is formed between lip 13 of comb strip 2 and part 14 of comb strip 1. Consequently it is also possible to provide a spot welding joint at 15 as well as at 12.
  • FIG. 4 shows a comb strip 1 in vertical side elevation in which the parts already mentioned are denoted by the same reference numerals.
  • extension lips 17 and 18 are, however, this time also bent outwards on either side. These lips serve for laterally supporting the fissile rods which one might wish to pass through this lattice as illustrated in FIGS. 6 and 11 respectively, which will hereinafter be reviewed.
  • FIG. 5 as well as the assoicated FIG. 5a give a side view and a top-plan view of the comb strip 2, which is constructed in the same way as comb strip 1, it being understood that the extension lips in comb strip 2 are omitted.
  • Numeral 19 denotes fissile rods which are supported at 20 and 21 by the extension lips 17 and 18 already mentioned. On its outer side the lattice is bounded by the side walls 22 and 23.
  • FIG. 7 representing a side view of the lattice of FIG. 6 according to arrow VII, wil need no further explanation, as is also the case with FIG. 8, in which the other side view is illustrated according to arrow VIII.
  • FIG. 9 shows as asymmetrical plate spring of the type also termed an amazon spring.
  • This plate spring 24 is attached at its ends 25 and 26 to a comb strip by means of spot welds 27.
  • the plate spring has a double arching which consists of a small arching 28 followed by a larger arching 29.
  • Both archings are bent outwards to the same side of the plate spring.
  • the plate spring is for this purpose shaped in such a way that the transitional part 30 is situated a certain distance away from the wall of the comb strip.
  • a broadened part 31 is incorporated in the middle of which an aperture 32 is provided. This aperture makes it easier for the coolant current which is propelled through the nuclear reactor to reach every part of the plate spring so that good cooling of the plate spring is ensured.
  • a bulge 33 is provided which is used as a contact surface that remains in touch with the fissile rod.
  • FIG. 10 illustrates, in a cross-section of one cell of the lattice, how a fissile rod 19 is supported by the amazon spring 24 already described.
  • the fissile rod [9 is supported by two bent extension lips 35 and 36. These lips have a larger thickness than the comb strip 2, because the comb strips 37 which intersect strips 2 are in this case provided with a thickened band 38 which forms an integral part of each strip 37.
  • FIG. 10a shows this in a vertical cross-section of comb strip 37.
  • the extension lips 35 and 36 are stamped out and bent outwards from this thickened part 38. As the extension lips 35 and 36 now have a larger thickness.
  • a lattice specially adapted to support a bunch of elongated components participating in a heat-exchange process, wherein said lattice comprises comb-like strips which form compartments surrounded by intersecting strips, said strips having comb-like incisions adapted to engage said strips in an intersecting manner.
  • edges of said strips are provided on both sides with fixing lips which are bent into the plane of the lattice and are also stamped out of the edge of the strip, wherein at each incision of each strip of the lattice there is a first lip on the same edge as the incision and a second lip on the edge opposite said incision, and at each intersection of the strips said second lip of one strip extends through the incision of a second intersecting strip and is secured to said intersecting strip on the side opposite the position at which said first lip is secured.
  • a lattice according to claim 1 in which the fixing of a lip to an intersecting strip is effected by means of the spot welding process.
  • a lattice according to calim 1' in which the lips of a comb-like strip at oppositely situated edges are also bent outwards in opposite directions.
  • a lattice according to claim 4 in which the lips at one edge of a comb-like strip are longer than the lips situated at the other edge.
  • a lattice constructed of a set of parallel elongated first strips residing in a given plane and a set of parallel elongated second strips also residing in said plane, said sets of first and second strips intersecting and engaging at a plurality of complementary spaced-apart incisions each of which extends from one edge of each strip toward the opposite edge of the respective strip, whereby said sets of strips form compartments, each edge portion of each strip having a lip stamped out of the material of the strip at the intersection points so as to extend parallel to the respective intersecting strip, wherein at each incision of each strip of the lattice there is a first lip on the same edge as the incision and a second lip on the edge opposite said incision, and at each intersection 3 ,8 89,43 8 5 6 of the strips said second lip of one strip extends through 7.
  • a lattice as in claim 6 wherein the lips on opposite the incision of a second intersecting strip and is secured edge portions of a given strip extend in opposite directo said intersecting strip on the side opposite

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Civil Engineering (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Bridges Or Land Bridges (AREA)
  • Fuel Cell (AREA)
  • Connection Of Plates (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US238286A 1971-03-26 1972-03-27 Lattice construction Expired - Lifetime US3889438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/450,863 US4007899A (en) 1971-03-26 1974-03-13 Lattice construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7104076A NL7104076A (xx) 1971-03-26 1971-03-26

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/450,863 Division US4007899A (en) 1971-03-26 1974-03-13 Lattice construction

Publications (1)

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US3889438A true US3889438A (en) 1975-06-17

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ID=19812774

Family Applications (1)

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US238286A Expired - Lifetime US3889438A (en) 1971-03-26 1972-03-27 Lattice construction

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US (1) US3889438A (xx)
BE (1) BE780985A (xx)
CA (1) CA947439A (xx)
DE (1) DE2214529C3 (xx)
DK (1) DK135254B (xx)
FR (1) FR2130657B1 (xx)
GB (1) GB1382884A (xx)
IT (1) IT952379B (xx)
NL (1) NL7104076A (xx)
NO (1) NO134396C (xx)
SE (1) SE381074B (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090918A (en) * 1975-03-12 1978-05-23 General Atomic Company Spacer structure
US4195064A (en) * 1978-08-15 1980-03-25 Monsanto Company Unitized catalytic reactor construction
US4455007A (en) * 1982-08-03 1984-06-19 Crown Metal Manufacturing Hang rail support and hang rail
US20020110501A1 (en) * 2000-11-13 2002-08-15 John Barnes Thermally tolerant support structure for a catalytic combustion catalyst

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1022387A (en) * 1911-01-20 1912-04-02 Georg Czimeg Cross-joint between flat iron bars.
US1768157A (en) * 1929-08-12 1930-06-24 Walter Bates Steel Corp Grating
US2214042A (en) * 1938-08-03 1940-09-10 Emory F Burdick Divider structure
US2782696A (en) * 1952-03-25 1957-02-26 New Era Engineers Proprietary Manufacture of metal grating
US3068163A (en) * 1958-08-26 1962-12-11 Jr Edwin L Currier Method and means for supporting reactor fuel containers in an assembly
US3389451A (en) * 1965-12-20 1968-06-25 Air Preheater Method of making an interlocking strip structure
US3646994A (en) * 1969-12-23 1972-03-07 Reactor Centrum Nederland Spacer grid respectively plate spring for a bunch of cylindrical elements taking part in a heat-exchanging process

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1480965A (xx) * 1965-05-25 1967-08-09

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1022387A (en) * 1911-01-20 1912-04-02 Georg Czimeg Cross-joint between flat iron bars.
US1768157A (en) * 1929-08-12 1930-06-24 Walter Bates Steel Corp Grating
US2214042A (en) * 1938-08-03 1940-09-10 Emory F Burdick Divider structure
US2782696A (en) * 1952-03-25 1957-02-26 New Era Engineers Proprietary Manufacture of metal grating
US3068163A (en) * 1958-08-26 1962-12-11 Jr Edwin L Currier Method and means for supporting reactor fuel containers in an assembly
US3389451A (en) * 1965-12-20 1968-06-25 Air Preheater Method of making an interlocking strip structure
US3646994A (en) * 1969-12-23 1972-03-07 Reactor Centrum Nederland Spacer grid respectively plate spring for a bunch of cylindrical elements taking part in a heat-exchanging process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090918A (en) * 1975-03-12 1978-05-23 General Atomic Company Spacer structure
US4195064A (en) * 1978-08-15 1980-03-25 Monsanto Company Unitized catalytic reactor construction
US4455007A (en) * 1982-08-03 1984-06-19 Crown Metal Manufacturing Hang rail support and hang rail
US20020110501A1 (en) * 2000-11-13 2002-08-15 John Barnes Thermally tolerant support structure for a catalytic combustion catalyst
US7163666B2 (en) * 2000-11-13 2007-01-16 Kawasaki Jukogyo Kabushiki Kaisha Thermally tolerant support structure for a catalytic combustion catalyst

Also Published As

Publication number Publication date
FR2130657B1 (xx) 1977-07-22
DE2214529C3 (de) 1982-01-28
NO134396C (xx) 1976-09-29
NO134396B (xx) 1976-06-21
FR2130657A1 (xx) 1972-11-03
SE381074B (sv) 1975-11-24
DE2214529B2 (xx) 1981-05-27
DK135254C (xx) 1977-08-29
DE2214529A1 (de) 1972-10-05
DK135254B (da) 1977-03-21
IT952379B (it) 1973-07-20
BE780985A (nl) 1972-07-17
GB1382884A (en) 1975-02-05
NL7104076A (xx) 1972-09-28
CA947439A (en) 1974-05-14

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