US3924380A - Lattice for supporting a bunch of bar-shaped members - Google Patents

Lattice for supporting a bunch of bar-shaped members Download PDF

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Publication number
US3924380A
US3924380A US367408A US36740873A US3924380A US 3924380 A US3924380 A US 3924380A US 367408 A US367408 A US 367408A US 36740873 A US36740873 A US 36740873A US 3924380 A US3924380 A US 3924380A
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US
United States
Prior art keywords
lattice
partition
straps
partitions
lip
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
US367408A
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English (en)
Inventor
Hendricus Johannes Quaadvliet
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.)
STICHTING REACTOR CENTRUM
STICHTING REACTOR CENTRUM NEDERLAND
Original Assignee
STICHTING REACTOR CENTRUM
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Publication date
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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
    • G21C3/348—Spacer grids formed of assembled non-intersecting strips
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B81/00—Cabinets or racks specially adapted for other particular purposes, e.g. for storing guns or skis
    • A47B81/007—Racks for cylindrical or barrel-like objects, e.g. casks, rolls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0135—Auxiliary supports for elements for tubes or tube-assemblies formed by grids having only one tube per closed grid opening
    • 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

  • the invention relates to a prior-art lattice which is especially serviceable for supporting a bunch of elongated members taking part in a process of heat exchange, which lattice is composed of parallel, equidistant, straight straps or strips, the side faces of which straps are likewise arranged in mutually parallel fashion, meshes being formed by connecting the straps at regular intervals by means of partitions positioned transversely to the strap direction.
  • Such a lattice has so far been marked by the disadvantage that these straps and partitions were connected to each other by means of deep cuts in the straps. These cuts weakened the straps, especially because the bending strength was extensively affected.
  • a partition is furnished on at least one side which rests against a strap with fastening lips that are passed through apertures in the wall.
  • the measure can be taken that a lip is punched out of an aperture in the strap, which lip is fastened to the wall of a partition. This contributes to imparting additional strength of the lattice.
  • a partition is furthermore furnished with one or more bent lips that are attached to a wall by the side of the partition.
  • the aperture made in the strap for passing the lips are preferably round. Care is also taken for these apertures to have a larger dimension than the width of a fastening lip to be passed through them. This measure allows the different strips to be mounted at different distances from each other. Differences in thickness occurring as a result of the pickling operation can thus be prevented from having any harmful effect upon the pitch of the lattice cells.
  • the successive connecting pieces must be positioned in exactly the same plane.
  • the lips of those connecting pieces extending to other connecting pieces are therefore staggered over a distance corresponding to the thickness of the connecting piece.
  • Staggering is here understood to indicate a method according to which a lip is displaced parallel to itself over a given distance, in such a way that the transition from lip to plate exhibits two oppositely directed curvatures which are separated by a bending point.
  • the invention relates substantially to lattices composed of parallel straps with intermediate connecting pieces, it is also possible according to the invention to construct a lattice exclusively from strips. This design can sometimes prevent advantages where lattices must be provided in spaces having particularly erratic forms.
  • the lattices are manufactured by mounting the connecting pieces, also called strips, around prismatic rods which are very exactly dimensioned and have recesses in the places where lips are present, whereupon the lips are fastened by spot welding. It is conducive to rapid processing and accurate work if the prismatic rods are grouped together to form an assembly fixture (also called a jig) which also bears spot-weld contact points.
  • assembly fixture also called a jig
  • FIG. 1 represents a partition with lips that are opened out and lips that are not opened out.
  • FIG. 2 is a side view of the partition according to FIG. 1.
  • FIG. 3 is a top view of the partition according to FIG. 1.
  • FIG. 4 represents a strap with apertures provided therein.
  • FIG. 5 represents a variant of a partition.
  • FIG. 6 is a front view of the partition according to FIG. 5.
  • FIG. 7 is a top view of the partition according to FIG. 5.
  • FIG. 8 is a top view of a lattice according to the invention.
  • FIG. 9 is a top view of a portion of the lattice comprising a support according to the invention.
  • FIG. 10 is a variant of FIG. 9.
  • FIG. 11 is another variant of FIG. 9.
  • FIG. 12 is a variant ofa'partition drawn on a smaller scale.
  • FIG. 13 is another variant of a partition drawn on a smaller scale.
  • FIG. 14 is a variant of FIG. 4 with lips for spacers.
  • FIG. 15 is a top view of another spacer.
  • FIG. 16 is a side view of the spacer according to FIG. 15.
  • FIGS. 17 and 18 are across section and a top view, respectively, of a welding cap.
  • FIGS. 19 and 20 are a top view and a side view, respectively, of a rigid clip support functioning as a spacer.
  • FIGS. 1, 2 and 3 show different views of a connecting piece or strip 11 which bears 'rectangularly bent lips 14 and 15 as well as lips 12 and l3 which extend almost continuously.
  • FIG. 3 clearly indicates that these lips 12 and 13 are slightly displaced parallel to themselves, i.e., they are staggered with respect to the body of the plate
  • FIG. 4 is a view of a strap 20 with apertures 21 and 22 provided therein.
  • the three views of FIGS. 5, 6 and 7 illustrate a variant of a partition as used on the side of the lattice where the last row of partitions are connected by their lips 24 to the strap 20 and those plates which form the corner of the lattice.
  • the plate 23 here bears bent lips 24 and 25 as well as very short lips 26 which are not bent but remain in the plane of the plate portion of the strip 23.
  • FIG. 8 illustrates in a top view how a lattice 27 can be constructed from straps 20 and strips 11.
  • This figure clearly indicates that all through this lattice there occur attachments of the type 28 and 29, i.e., the places of attachment are always constituted merely by two lips which are fastened to each other with a spot weld. Nowhere in the lattice is it necessary to fasten three lips to each other. This ensures uniformity in providing the spot welds, which can thus be of identical strength throughout the lattice.
  • the number 32 indicates a U-shaped bent strip which serves as a fixed support for a fissile material-bar 33.
  • Flg. 16 a side view of such a fixed support isillustrated, while FIg.
  • FIG. 10 illustrates a fissile material bar 39 under the load of springs 36, the fixed supports being constituted by lips 41 that are punched and bent out of the straps 20, as shown in FIG. 14. 1 i
  • FIG. 11 illustrates'anembodiment where the fissile material bar 43 on the side opposite the springs 36 receives the fixed support of clips 44 which are fastened with a spot'weld to a lattice wall.
  • FIGS. 19 and show a top view and a side view, respectively, of these clips.
  • FIG. 12 indicates another possible manner of punching fixed lip supports in the form of lips 30 from the strips themselves.
  • FIG. 13 shows another variant, where two pairs of lips, 30 and 31, respectively, have been punched out and can be bent over.
  • FIG. 14 represents a side view of a strap which is again provided with apertures 21 and 22 as well as with lips 41 which are punched out and bent so as to serve as fixed supports for the fissile material bars 39 of FIG. 10.
  • FIG. 14 shows that these straps are furnished at the ends with lips 42 that are bent for being attached to the strips which are located entirely on the outside edge of the lattice.
  • FlGS.'l7 and 18 are a cross section and a top view, respectively, of a welding cap 45 as used for providing a spot weld between two walls 46 and 47which are made of such a material that it is not very practicable to join these walls directly to each other.
  • a welding cap 45 designed as a small dish the recessed portion 48 of which extends throughthe aper ture 51 made in the wall 46 which consists of a material that is hard to weld.
  • the material of the cap 45 is of such a nature as to be highly weldable to the wall 47.
  • FIG. 17 shows the recessed design. Another possibility consists in having the edge 52 pressing directly on the outer surface of 46.
  • FIG. 6 illustrates how welding apertures 51 can be arranged in a partition 23.
  • a lattice for supporting a plurality of elongated members taking part in a process of heat exchange, such as nuclear'fissile fuel rods said lattice comprising a plurality of partitions, each of said partitions having a spaced lip portion extending therefrom in the general plane of said strap, and a spaced tab portion disposed in a plane generally perpendicular to said lip portion, a plurality of partitions being disposed in generally the same plane in each of a plurality of columns forming the lattice, plurality of straps disposed in planes generally perpendicular to the planes of said partitions whereby "each strap forms a row of the lattice, each of said straps having a plurality of apertures formed therein receiving said lip portions of said partitions, said partitions being disposed so that a lip portion of one partition passes through the aperture of a strap and is attachedto a side face of the next consecutive partition so that'the partitions in each column are dipsosed in generally the
  • each of the apertures formedin'each of the straps is of larger dimension than the width of the partition lip portion which is passed therethrough.
  • each partition has a plurality of spaced lip and tab portions, and each strap has a plurality of apertures corresponding to said lip portions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Connection Of Plates (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)
US367408A 1972-06-12 1973-06-06 Lattice for supporting a bunch of bar-shaped members Expired - Lifetime US3924380A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7207937A NL7207937A (fr) 1972-06-12 1972-06-12

Publications (1)

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US3924380A true US3924380A (en) 1975-12-09

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ID=19816251

Family Applications (1)

Application Number Title Priority Date Filing Date
US367408A Expired - Lifetime US3924380A (en) 1972-06-12 1973-06-06 Lattice for supporting a bunch of bar-shaped members

Country Status (10)

Country Link
US (1) US3924380A (fr)
JP (1) JPS5624240B2 (fr)
BE (1) BE800598A (fr)
CH (1) CH572265A5 (fr)
DE (1) DE2329471A1 (fr)
FR (1) FR2200946A5 (fr)
GB (1) GB1431497A (fr)
IT (1) IT986135B (fr)
NL (1) NL7207937A (fr)
SE (1) SE414341B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6708960B2 (en) * 2001-07-10 2004-03-23 Integrid Inc. Cooling tower support grid

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5831780A (ja) * 1981-08-20 1983-02-24 Mitsubishi Electric Corp フオント文字出力用感熱記録装置
EP0433493B1 (fr) * 1989-12-22 1994-09-14 Siemens Aktiengesellschaft Assemblage de combustible de réacteur nucléaire à grilles d'espacement et méthode pour sa fabrication

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1749902A (en) * 1929-04-04 1930-03-11 Kerlow Steel Floor Company Floor grating
US3156957A (en) * 1961-12-01 1964-11-17 Life Man Inc Floor mat and method of making the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4428879Y1 (fr) * 1966-03-29 1969-11-29

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1749902A (en) * 1929-04-04 1930-03-11 Kerlow Steel Floor Company Floor grating
US3156957A (en) * 1961-12-01 1964-11-17 Life Man Inc Floor mat and method of making the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6708960B2 (en) * 2001-07-10 2004-03-23 Integrid Inc. Cooling tower support grid
US20040099968A1 (en) * 2001-07-10 2004-05-27 Lloyd Olson Cooling tower support grid
US6877727B2 (en) 2001-07-10 2005-04-12 Lloyd Olson Cooling tower support grid
USRE41723E1 (en) * 2001-07-10 2010-09-21 Integrid Inc. Cooling tower support grid

Also Published As

Publication number Publication date
DE2329471A1 (de) 1973-12-20
JPS4962891A (fr) 1974-06-18
NL7207937A (fr) 1973-12-14
GB1431497A (en) 1976-04-07
IT986135B (it) 1975-01-20
BE800598A (nl) 1973-12-07
JPS5624240B2 (fr) 1981-06-04
FR2200946A5 (fr) 1974-04-19
CH572265A5 (fr) 1976-01-30
SE414341B (sv) 1980-07-21

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