SE414428B - DISTANCING GRIDS FOR RABBING HEAD EXCHANGERS - Google Patents
DISTANCING GRIDS FOR RABBING HEAD EXCHANGERSInfo
- Publication number
- SE414428B SE414428B SE7317230A SE7317230A SE414428B SE 414428 B SE414428 B SE 414428B SE 7317230 A SE7317230 A SE 7317230A SE 7317230 A SE7317230 A SE 7317230A SE 414428 B SE414428 B SE 414428B
- Authority
- SE
- Sweden
- Prior art keywords
- rods
- fields
- rod
- frame
- grid
- Prior art date
Links
Classifications
-
- 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
- F28F9/0136—Auxiliary supports for elements for tubes or tube-assemblies formed by grids having only one tube per closed grid opening formed by intersecting strips
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Description
15 20 25 30 40 _731.'723Û-6 kan exempelvis vara en lâgsmältande metall, det kan emellertid även användas värmefasta mellanlägg av fasta ämnen, närmare bestämt metalliska liksom icke metalliska material. Väsentligt kriterium är en lätt bearbetbarhet av materialet. For example, it may be a low-melting metal, however, heat-resistant inserts of solids, more specifically metallic as well as non-metallic materials, may also be used. An essential criterion is an easy processability of the material.
De av spåren i sina lägen fastlagda stavarna, som håller rör- knippenas rör från varandra, behöver endast fastas med ringa krafter, för att de ej skall kunna lossna från spåren. För detta ändamål kan man anordna en svetsning, som på grund av den ringa fasthållníngs- kraften ej kan leda till värmespänningar eller kast. Det är emeller- tid även möjligt, att fästa de i spåren vilande stavarna med en särskild, vid ramen fastsatt avtäckning. Exempelvis kan man lägga band eller liknande över stavarna, vilka band genom skruvning eller annan fastsättning förbinds med gitterramen.The rods fixed by the grooves in their positions, which keep the tubes of the pipe bundles apart, only need to be fastened with small forces, so that they cannot detach from the grooves. For this purpose, a weld can be provided which, due to the small holding force, cannot lead to thermal stresses or throws. However, it is also possible to fasten the rods resting in the grooves with a special cover attached to the frame. For example, bands or the like can be laid over the rods, which bands are connected to the lattice frame by screwing or other fastening.
För närmare förklaring av uppfinningen kommer i det följande ett distanseringsgitter enligt uppfinningen att beskrivas under ~hänvisning till ritningen.For a more detailed explanation of the invention, a spacing grid according to the invention will be described in the following with reference to the drawing.
Distanseringsgittret visas i fig. 1 uppifrån. Det består av en cylíndrisk ytterram 1 av stål med ett fyrkantigt, speciellt kvadratiskt tvärsnitt. i denna ram 1 är med de endast antydda rörens 4 hos det ej utvisade rörknippet, avstånd stavar Z och 3 inlagda med en vinkel av ungefär 1200 mot varandra. Stavarna består likaså av stål, så att en fastsvetsning av stavarna och ramen är möjlig.The spacing grid is shown in Fig. 1 from above. It consists of a cylindrical outer frame 1 of steel with a square, especially square cross-section. in this frame 1, with the only indicated tubes 4 of the tube bundle (not shown), spaced bars Z and 3 are inserted at an angle of approximately 1200 to each other. The rods also consist of steel, so that a welding of the rods and the frame is possible.
Stavarnas 2, 3 noggranna läge ges av spar 5, som är infrästa i ytterramens 1 ändsidor 6, som framgår av fig. 2, visande en vy i större skala. _ Av fig. 2 framgår, att spärens 5 djup, vilket vid utförings- exemplet motsvarar höjden hos de i tvärsnitt likaså fyrkantiga stavarna 2, 3, är mindre än halva höjden H hos gitterramen 1. Med en svetssträng 7 vid kanten av spåret åstadkommes en fastsättning av stavarna i gitterramen, utan att det behöver fruktas att ramen eller stavarna slår sig, vilket kan inverka på införandet av rör- knippena i distanseringsgittret.The exact position of the rods 2, 3 is given by grooves 5, which are milled into the end sides 6 of the outer frame 1, as shown in Fig. 2, showing a view on a larger scale. It can be seen from Fig. 2 that the depth of the rafter 5, which in the exemplary embodiment corresponds to the height of the rods 2, 3 also in cross section, is less than half the height H of the lattice frame 1. With a welding string 7 at the edge of the groove a attachment of the rods in the grid frame, without having to fear that the frame or rods will strike, which may affect the insertion of the tube bundles into the spacer grid.
Bredden B hos spåren S svarar mot stavarnas Z, 3 bredd liksom mot det minsta, för ínbyggnaden erforderliga spelet. Endast för förklaring av en annan utföringsForm är vid spdrct 5' ett mellan- lägg 8 av stâlplåt mellan spärväggen 9 och staven Z visat, medelst vilket ett större spel í efterhand kan minskas. En pa ändsidan 6 pålagd ring 10 hindrar, att staven I faller ur spåret 5.The width B of the grooves S corresponds to the width of the rods Z, 3 as well as to the smallest clearance required for the installation. Only for the explanation of another embodiment, in the case of spdrct 5 ', a spacer 8 of steel plate is shown between the barrier wall 9 and the rod Z, by means of which a larger clearance can be reduced afterwards. A ring 10 applied to the end side 6 prevents the rod I from falling out of the groove 5.
Det nya distanseringsgittret kan framställas med lämpliga verktygsmaskiner, speciellt med multipelfräsmaskiner, med~re1ativt 7317230-6 ringa arbetskostnad. Även inläggandet av stavarna Z, S erbjuder ej några svårigheter, om man jämför detta med avståndshâllningen medelst de hittills vanliga sätten, varvid stavarna fastlagts på den ej spårförsedda gítterramen för fastsvetsníng. Totalt kan man sålunda räkna med, att det nya dístanseringsgíttret, som användes vid ângalstrare för tryckvattenreaktorer ungefär 10 - 20 per ång- alstrare, är ekonomiskt att insätta.The new spacing grid can be manufactured with suitable machine tools, especially with multiple milling machines, with relatively low labor cost. The insertion of the rods Z, S also does not present any difficulties, if one compares this with the spacing by means of the hitherto usual methods, whereby the rods are fixed on the non-grooved grid frame for welding. In total, it can thus be expected that the new spacing grid, which was used in steam generators for pressurized water reactors approximately 10-20 per steam generator, is economical to use.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722263056 DE2263056C3 (en) | 1972-12-22 | 1972-12-22 | Spacer grille for tube bundle heat exchangers |
Publications (1)
Publication Number | Publication Date |
---|---|
SE414428B true SE414428B (en) | 1980-07-28 |
Family
ID=5865271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7317230A SE414428B (en) | 1972-12-22 | 1973-12-20 | DISTANCING GRIDS FOR RABBING HEAD EXCHANGERS |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2263056C3 (en) |
IT (1) | IT1000362B (en) |
SE (1) | SE414428B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1065374B (en) * | 1976-12-21 | 1985-02-25 | Breda Termomeccanica Spa | SUPPORT GRID FOR TUBES AND ITS ASSEMBLY IN A STEAM GENERATOR OR SIMILAR |
DE2751744C2 (en) * | 1977-11-19 | 1986-09-25 | Balcke-Dürr AG, 4030 Ratingen | Device for holding a tube bundle |
IT1096096B (en) * | 1978-05-17 | 1985-08-17 | Soligno Vincenzo | GUIDE-SUPPORT OF THE GRID TYPE FOR PIPES FOR STEAM GENERATORS |
US4359088A (en) * | 1980-11-21 | 1982-11-16 | The Babcock & Wilcox Company | Steam generator tube supports |
DE3309416C2 (en) * | 1982-03-18 | 1985-12-05 | Cass International GmbH, 2070 Ahrensburg | Tube support grid for tube bundle heat exchangers |
IT1200308B (en) * | 1986-10-29 | 1989-01-12 | Ansaldo Spa | APE NEST THERMAL SCREEN FOR HEAT EXCHANGERS |
-
1972
- 1972-12-22 DE DE19722263056 patent/DE2263056C3/en not_active Expired
-
1973
- 1973-12-18 IT IT5438273A patent/IT1000362B/en active
- 1973-12-20 SE SE7317230A patent/SE414428B/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE2263056C3 (en) | 1980-10-23 |
IT1000362B (en) | 1976-03-30 |
DE2263056A1 (en) | 1974-07-25 |
DE2263056B2 (en) | 1980-02-14 |
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