ITCL20110001A1 - STP SPECIAL THREADED PLUG FOR CAPPING HEAT EXCHANGERS - Google Patents
STP SPECIAL THREADED PLUG FOR CAPPING HEAT EXCHANGERS Download PDFInfo
- Publication number
- ITCL20110001A1 ITCL20110001A1 IT000001A ITCL20110001A ITCL20110001A1 IT CL20110001 A1 ITCL20110001 A1 IT CL20110001A1 IT 000001 A IT000001 A IT 000001A IT CL20110001 A ITCL20110001 A IT CL20110001A IT CL20110001 A1 ITCL20110001 A1 IT CL20110001A1
- Authority
- IT
- Italy
- Prior art keywords
- cap
- threaded
- stp
- indicated
- heat exchangers
- Prior art date
Links
- 239000004035 construction material Substances 0.000 claims 1
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/11—Plugs
- F16L55/1108—Plugs fixed by screwing or by means of a screw-threaded ring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
- F28F11/02—Arrangements for sealing leaky tubes and conduits using obturating elements, e.g. washers, inserted and operated independently of each other
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Sealing Of Jars (AREA)
- Buffer Packaging (AREA)
- Closures For Containers (AREA)
Description
DESCRIZIONE DESCRIPTION
Dell’invenzione industriale dal Titolo: Tappi “STP†Special Tube Plugs Of the industrial invention entitled: â € œSTPâ € Special Tube Plugs
STATO ANTERIORE DELLA TECNICA: BACKGROUND OF THE TECHNIQUE:
Quando ci si accerta che un tubo scambiatore di un fascio tubiero à ̈ bucato e quindi vi à ̈ comunicazione certa tra il lato mantello e il lato tubi, con inevitabile miscelazione dei fluidi, salvo che questi non siano alla stessa pressione, o si sostituisce il tubo o si tappa le sue estremità . When it is ascertained that an exchanger tube of a tube bundle is punctured and therefore there is certain communication between the shell side and the tube side, with inevitable mixing of the fluids, unless they are at the same pressure, or the tube or plug its ends.
L’attuale metodologia prevede l’inserimento nell’estremità del tubo di un tappo tronco-conico, di materiale uguale a quello del tubo, con semi-angolo al vertice compreso, tra due e tre gradi, inserendolo battendo sulla base maggiore di esso con un martello oppure saldandolo alla piastra tubiera. Altra possibilità può essere l’utilizzo di tappi a espansione che inseriti all’estremità del tubo mediante un doppio dado esercitano il rigonfiamento all’interno del tappo per permettere l’esclusione del tubo dal processo. The current methodology foresees the insertion in the end of the tube of a truncated-conical plug, made of the same material as the tube, with a semi-angle at the vertex between two and three degrees, inserting it by beating on the larger base of it with a hammer or by welding it to the tube sheet. Another possibility can be the use of expansion plugs which, inserted at the end of the tube by means of a double nut, swell inside the plug to allow the pipe to be excluded from the process.
Quali sono i rischi connessi all’utilizzo dei sistemi sopra descritti? Pericolo di proiezione del tappo a seguito test idraulico del lato mantello, per eventuali formazioni di sacche d’aria formatesi all’interno del tubo escluso, oppure il tappo si rimuova durante l’esercizio con conseguente comunicazione tra lato mantello e lato tubi e miscelazione dei fluidi. What are the risks associated with the use of the systems described above? Danger of projection of the cap following the hydraulic test of the shell side, due to possible formation of air pockets formed inside the excluded pipe, or the cap is removed during operation with consequent communication between the shell side and the pipes side and mixing of fluids.
Per eliminare il pericolo di proiezione del tappo tronco-conico, questi à ̈ saldato al tubo con saldatura d’angolo. Durante tale saldatura si rischia, di perturbare le condizioni di tenuta della mandrinatura dei tubi circostanti. To eliminate the danger of projection of the truncated cone cap, it is welded to the tube with corner welding. During this welding there is a risk of disturbing the sealing conditions of the surrounding tube expansion.
Il tappo a espansione per la metodologia di montaggio impone delle azioni talmente ben precise e definite che sia improbabile montare bene il tappo e quindi avere anche in questo caso l’eventualità di proiezione del tappo verso l’ambiente quindi pericolo per chi opera nelle vicinanze. The expansion cap for the assembly method requires such very precise and defined actions that it is unlikely to fit the cap well and therefore also in this case have the possibility of the cap being projected towards the environment and therefore a danger for those who work in vicinity.
OBIETTIVO CHE L’INNOVAZIONE INTENDE RAGGIUNGERE: GOAL THAT INNOVATION INTENDS TO ACHIEVE:
Evitare la possibilità di proiezione del tappo verso l’ambiente circostante. Facilitare il montaggio, evitare che si possa muovere durante l’esercizio, evitare di perturbare i tubi vicini. Avoid the possibility of projection of the cap towards the surrounding environment. Facilitate assembly, prevent it from moving during operation, avoid disturbing nearby pipes.
Migliorare le condizioni di tenuta di tutto il sistema. Improve the sealing conditions of the whole system.
ANALISI DEL RISULTATO RAGGIUNTO Per far fronte ai problemi ricorrenti di cui sopra l’invenzione di cui si chiede il brevetto ha caratteristiche costruttive e geometriche che servono a limitare gli errori di montaggio, a offrire la possibilità di smontare un tappo già installato senza alcun rischio. Il tappo STP, riportato nel disegno allegato, prodotto in vari size e materiali, si monta in pochi minuti e si collega al tubo scambiatore previo una leggera alesatura conica e successiva filettatura per rullatura. ANALYSIS OF THE ACHIEVED RESULT To cope with the recurring problems mentioned above, the invention for which the patent is requested has constructive and geometric characteristics that serve to limit assembly errors, to offer the possibility of disassembling a cap already installed without any risk . The STP cap, shown in the attached drawing, produced in various sizes and materials, is assembled in a few minutes and is connected to the exchanger tube after a light conical boring and subsequent threading by rolling.
La filettatura per rullatura non indebolisce il tubo, anzi rafforza la mandrinatura. The rolling thread does not weaken the tube, on the contrary it strengthens the rolling.
Il collegamento filettato assicura un solido ancoraggio al tubo impedendone la proiezione accidentale a seguito della spinta della pressione. The threaded connection ensures a solid anchorage to the pipe, preventing accidental projection as a result of the pressure thrust.
E’ possibile smontare il tappo senza nessun rischio per le persone, la canalina praticata sulla filettatura consente di scaricare la pressione, eventualmente creatasi all’interno del tubo escluso. It is possible to disassemble the cap without any risk for people, the channel made on the thread allows to release the pressure, possibly created inside the excluded pipe.
Per prevenire la proiezione dovuta alla pressione, non à ̈ necessaria alcuna saldatura. To prevent projection due to pressure, no welding is required.
Non sono necessari schermi di protezione per ispezionare la piastra tubiera. Non si rischia di innescare effetto domino sui tubi prossimi à ̈ per l’assenza di saldatura à ̈ per la mancanza di percosse sul tappo. No shields are required to inspect the tube sheet. There is no risk of triggering a domino effect on the next tubes ̈ due to the absence of welding due to the lack of beating on the cap.
Il tappo STP si presta sia per l’esclusione di tubi forati che per l’eliminazione di perdite da mandrinatura e/o saldatura. The STP cap is suitable both for the exclusion of perforated pipes and for the elimination of leaks from expansion and / or welding.
Si vuole infine affermare che la forma di realizzazione fin qui illustrata à ̈ stata fornita a titolo puramente esemplificativo e che sono possibili varianti tutte rientranti nel medesimo concetto inventivo, cosi ad esempio, la canalina indicata con il numero 1, può essere anche più di una. Finally, we want to state that the embodiment illustrated up to now has been provided purely by way of example and that variants are possible, all falling within the same inventive concept, so for example, the raceway indicated with the number 1, can also be more than one .
Altra variante può essere la geometria indicata con il numero 1. Another variant can be the geometry indicated with the number 1.
Altra variante, non rappresentata può essere la geometria della testa del tappo indicata nel disegno con il numero 2, realizzata in maniera diversa ma con la stessa finalità , tipo un quadretto oppure un ottagono. Altra variante, non rappresentata, può essere la metodologia di realizzazione della filettatura nel tubo scambiatore. Another variant, not shown, may be the geometry of the cap head indicated in the drawing with the number 2, made in a different way but with the same purpose, such as a small square or an octagon. Another variant, not shown, may be the method of making the thread in the exchanger tube.
Altra variante, non rappresentata, può essere il sistema di alesatura conica da realizzare all’interno del tubo scambiatore per la successiva filettatura. Altra variante, non rappresentata, può essere i diversi materiali con cui si possono costruire i tappi STP. Another variant, not shown, may be the conical boring system to be made inside the exchanger tube for the subsequent threading. Another variant, not shown, may be the different materials with which the STP caps can be built.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000001A ITCL20110001A1 (en) | 2011-01-14 | 2011-01-14 | STP SPECIAL THREADED PLUG FOR CAPPING HEAT EXCHANGERS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000001A ITCL20110001A1 (en) | 2011-01-14 | 2011-01-14 | STP SPECIAL THREADED PLUG FOR CAPPING HEAT EXCHANGERS |
Publications (1)
Publication Number | Publication Date |
---|---|
ITCL20110001A1 true ITCL20110001A1 (en) | 2012-07-15 |
Family
ID=43975295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT000001A ITCL20110001A1 (en) | 2011-01-14 | 2011-01-14 | STP SPECIAL THREADED PLUG FOR CAPPING HEAT EXCHANGERS |
Country Status (1)
Country | Link |
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IT (1) | ITCL20110001A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US863953A (en) * | 1906-08-01 | 1907-08-20 | George Washington Tribbey | Faucet. |
US4662806A (en) * | 1983-11-17 | 1987-05-05 | Reed International, Incorporated | Metal lock system and method |
US5341833A (en) * | 1992-07-30 | 1994-08-30 | Don Davis | Tire valve cap |
-
2011
- 2011-01-14 IT IT000001A patent/ITCL20110001A1/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US863953A (en) * | 1906-08-01 | 1907-08-20 | George Washington Tribbey | Faucet. |
US4662806A (en) * | 1983-11-17 | 1987-05-05 | Reed International, Incorporated | Metal lock system and method |
US5341833A (en) * | 1992-07-30 | 1994-08-30 | Don Davis | Tire valve cap |
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