SI8210262A8

SI8210262A8 - Arrangement for positioning plugs into heat-exchanger tubes

Info

Publication number: SI8210262A8
Application number: SI8210262A
Authority: SI
Inventors: S L Rieben; J J Wilhelm; M E Wylie
Original assignee: Westinghouse Electric Corp
Priority date: 1981-02-25
Filing date: 1982-02-08
Publication date: 1995-10-31

Description

UREDJAJ ZA POSTAVLJANJE ČEPOVA U CEVI IZMENJIVAČA TOPLOTEDEVICE FOR FITTING THE COVERS IN THE HEAT EXCHANGER PIPE

Oblast tehnike u koju spada pronalazakFIELD OF THE INVENTION

Pronalazak spada u oblast fizike. Simboli Medjunarodne klasifikacije patenata su G 01L 5/00.The invention belongs to the field of physics. The symbols of the International Patent Classification are G 01L 5/00.

Tehnički problemTechnical problem

Problem se pojavljuje u slučajevima kada je potrebno da se izvrši pouzdano zaptivanje oštečene cevi kod izmenjivača toplote, a da pri tome vadjenje čepa vože da se izvrši na jednostavan način.The problem arises in cases where it is necessary to reliably seal the damaged pipe with a heat exchanger, while removing the plug to make it easy to perform.

Stanje tehnikeThe state of the art

U izraenjivačima toplote sa cevima, prvi fluid protiče kroz cevi izmenjivača toplote a drugi fluid okružuje ove cevi tako da se ima izmenjivanje toplote izmedju ova dva fluida. Na nesreču, jedna od cevi se može oštetiti tako da curenje iii preti iii več postoji na koji način dolazi do mešanja dva fluida. Kada do ovoga dodje, ponekad je neophodno začepiti cev čime se sprečava curenje iz cevi.In tube heat exchangers, the first fluid flows through the heat exchanger tubes and the second fluid surrounds these tubes so that there is heat exchange between the two fluids. Unfortunately, one of the pipes can be damaged so that leakage iii threatens or already exists in which way the two fluids are mixed. When this occurs, it is sometimes necessary to clog the pipe to prevent leakage from the pipe.

U energetskim postrojenjima sa nuklearnim reaktorom, izmenjivači toplote se cevima se obično nazivaju parnim generatorima. Pošto je fluid koji protiče kroz cevi nuklearnog parnog generatora u opštem slučaju radioaktivan, važno je ne dozvoliti da on curi iz cevi i zagadjuje fluid koji okružuje cevi. Stoga, kada do curenja dodje u nuklearnom parnom generatoru, odnosno njegovim cevima, cev izmenjivača toplote se začepi tako da seIn nuclear power plants with nuclear reactors, heat exchangers are commonly referred to as steam generators. Since the fluid flowing through the tubes of a nuclear steam generator is generally radioactive, it is important not to let it leak out of the pipe and pollute the fluid surrounding the tubes. Therefore, when a leak occurs in a nuclear steam generator or its pipes, the heat exchanger tube is clogged so that

2.2.

fluidu ne dozvoljava da protiče kroz tu cev.does not allow the fluid to flow through that tube.

Postoji nekoliko vrsta čepova koji se mogu koristiti za zaptivanje cevi izmenjlvača toplote. Jedan takav uredjaj koji se koristi za zatvaranje cevi izmenjlvača toplote nuklearnog parnog generatora je uredjaj sa eksplozivnim punjenjem. Kod uredjaja za začepijenje sa eksplozivnim punjenjem, metalni čep se postavi u cev izmenjlvača toplote a u njemu se nalazi eksploziv. Kada se eksploziv detonira, čep se dovodi u tesan kontakt sa unutrašnjim delom cevi na koji način blokira protok kroz cevi. Problem koji je vezan uz eksplozivno začepljavanje je u torne što ako postane potrebno zameniti oštedenu cev iii oštedeni čep, eksplozivni čep se mora izbušiti što je postupak koji oduzima dosta vremena.There are several types of plugs that can be used to seal a heat exchanger tube. One such device used to close the tubes of a nuclear steam generator heat exchanger is an explosive-charged device. For explosive-plugging devices, the metal plug is inserted into the heat exchanger tube and contains the explosive. When the explosive is detonated, the stopper is brought in close contact with the inside of the pipe, blocking the flow through the pipes. The problem with explosive clogging is the friction that if it becomes necessary to replace a damaged pipe or a damaged plug, the explosive plug must be drilled, which is a time consuming process.

Jedan drugi uredjaj koji se koristi za začepljenje cevi izmenjivača toplote u opštem slučaju se naziva mehaničkim čepom. Mehanički čep se sastoji od cilindričnog dela koji je zatvoren na jednom svome kraju te ima unutrašnju bušotinu konusnog oblika. Jedan proširivač se postavlja u ovaj cilindrični deo tako da kada se proširivač povleči duš ose cilindričnog dela, cilindrični deo se tera u tesan kontakt sa cevi izmenjlvača toplote zahvaljujudi različitim oblicima konusnih površina cilindričnog dela i proširivača. ϋ ovakvom tipu uredjaja, nije potreban nikakav eksploziv, da bi se ostvario tesan kontakt čepa i cevi izmenjlvača toplote. Radije se koristi proširivanje čepa koje je izazvano pomeranjem proširivača u čepu. Ovo daje mehaničkom čepu osoblnu da se može izvaditl bez bušenja.Another device used to clog the heat exchanger tubes is generally referred to as a mechanical plug. The mechanical plug consists of a cylindrical part which is closed at one end and has an inner bore of a conical shape. One expander is mounted in this cylindrical part so that when the expander pulls the soul of the axis of the cylindrical part, the cylindrical part is forced into close contact with the heat exchanger tube due to the different shapes of the conical surfaces of the cylindrical part and the extender. ϋ This type of device does not require any explosive to achieve close contact between the heat exchanger plug and tube. The plug extension that is caused by the displacement of the extender in the plug is preferred. This gives the mechanical plug a personal that it can be removed without drilling.

Da bi se izvadio mehanički zaptivač, potrebno ukloniti unutrašnji pritisak na čep pomeranjem proširivača u položaju čepu u kome konusi čepa i proširivača nisu u dodiru. Potom, pošto je pritisak uklonjen sa unutrašnjosti čepa, čep se može izvudi iz cevi izmenjlvača toplote, (videti DS patente 3.279.301 i 3.345.901).In order to remove the mechanical seal, it is necessary to remove the internal pressure on the cap by moving the expander in the position of the stopper where the cone plugs and expander are not in contact. Then, since the pressure has been removed from the inside of the cap, the cap can be removed from the heat exchanger tube (see DS patents 3.279.301 and 3.345.901).

Opis rešenja tehničkog problema sa primerima izvodjenja 1 popisom i kratkim opisom slika načrtaDescription of a solution to a technical problem with examples of execution 1 with a list and brief description of the design drawings

Da bi se čep brzo postavio u cev izraenjivača toplote, poželjno je imati mehanizem kojim se čep može i ubaciti u cev i brzo pomeriti proširivač u čepu ksko bi se čep učvrstio u cevi. Poštoji nekoliko mehanizama koji se mogu koristiti da bi se izvršilo ovo ubacivanje čepa u cev. No, brzo ubacivanje čepa u cev nije jedini kriterijum koji se mora zadovoljiti u ovakvom postupku. Pored brzog ubacivanja čepa u cev, takodje je neophodno imati mogučnost verifikacije da je čep pravilno postavljen u cevi pre nego što se čep proširi, Nepravilnim postavljanjem čepa u cevi može imati za posledicu nepravilno zaptivanje izmedju Čepa i cevi iii oštečenju cevi. Takodje je važno imati mogučnost verifikacije da je čep proširen do pravilne granice kako bi se imala potvrda da je čep efikasno začepio cev.In order for the plug to be quickly inserted into the heat exchanger tube, it is desirable to have a mechanism by which the plug can also be inserted into the tube and to move the expander in the plug quickly as soon as the plug is secured in the tube. There are several mechanisms that can be used to effect this plug insertion. However, the quick insertion of the plug into the tube is not the only criterion that must be satisfied in a procedure like this. In addition to the quick insertion of the plug into the pipe, it must also be possible to verify that the plug is properly inserted in the pipe before expanding the plug. Incorrect insertion of the plug in the pipe may result in incorrect sealing between the plug and the pipe or damage to the pipe. It is also important to be able to verify that the plug has been extended to the correct limit in order to confirm that the plug has effectively sealed the tube.

Stoga je osnovni predmet ovoga pronalaska da obezbedi jedan poboljšani uredjaj za postavljanje čepova kojim se čep može brzo postaviti u cev i kojim se može dobiti potvrda da je čep pravilno postavljen.Therefore, it is an essential object of the present invention to provide an improved plug-in device for fastening the plug to the tube and thereby obtaining confirmation that the plug is properly fitted.

Imajuči ovaj predmet u vidu, ovaj pronalazak se bavi uredjajem za postavljanje čepova koji se sastoji od kučišta sa jednim kliznim delom koji je u njemu postavljen, jedne šipke koja je klizno postavljena u pomenutom klizaču i sredstava za pomeranje te šipke u odnosu na klizač radi proširivanja čepa u cevi koji j·,e naznačen time što su senzori postavljeni na pomenutom klizaču i oko pomenute šipke radi odredjivanja i verifikovanja da li je klizač u kontaktu sa cevi.With this object in view, the present invention relates to a device for mounting plugs consisting of a housing with one sliding part therein, one rod slidably mounted in said slider and means for moving that rod relative to the slider for expanding plugs in a tube which is · · e, characterized by the fact that the sensors are mounted on said slide and around said bar to determine and verify that the slide is in contact with the tube.

Pronalazak če postati jasniji iz opisa koji sledi u kome je prikazan najpoželjnija konstrukcija, samo primera radi, kao i iz priloženih erteža koji predstavljaju:The invention will become clearer from the description below, which shows the most desirable construction, just for example, as well as from the accompanying drawings representing:

Slika 1 izgled uredjaja za postavljanje čepova.Figure 1 layout of the plug-in device.

Slika 2 pogled odozgo na uredjaj za postavljanje čepova, Slika 3 poprečni presek uredjaja za postavljanje Čepova, gde je čep prikazan u položaju kada nije proširen.Figure 2 is a top view of the plug-in device, Figure 3 is a cross-section of a plug-in device, where the plug is shown in the non-expanded position.

♦·♦ ·

4.4.

Slika 4 poprečni presek uredjaja za postavljanje čepova sa čepom u položaju kada je proširenFigure 4 is a cross-sectional view of the plug placement device with the plug in position when expanded

Slika 5 izgled duž linije V-V sa slike 2,Figure 5 is a view along line V-V of Figure 2,

Slika 6 izgled duž linije VI-VI sa slike 2,Figure 6 is a view along line VI-VI of Figure 2,

Slika 7 Šematski dijagram instrumenta sa nategnutim prstenom, j Slika 8 Šematski dijagram instrumenta za merenje pritiska.Figure 7 Schematic diagram of a tension ring instrument, j Figure 8 Schematic diagram of a pressure measuring instrument.

Pozivajudi se na slike 112, uredjaj 10 za postavljanje čepova sastoji se od jednog kudišta 12 sa jednom pokretnom Šipkom 14 koja je postavljena u njemu, šipka 14 ima navoje 16 na jednom svom kraju koji služe za zahvatanje sa navoj ima n čepu 22 cevi 10.Referring to FIGS. 112, the plug-mounting device 10 consists of a single housing 12 with a single movable rod 14 arranged therein, the rod 14 having threads 16 at one end of which are used to engage the thread having n plug 22 of the pipe 10.

Pozivajuči se sada na sliku 3, tipična cev 18 izmenjivača toplote drži se na jednom nosaču 20 na način koji je sličan onome kod nuklearnih parnih generatora. Kada se želi sprečiti protok fluida kroz cev 18 kao Sto je u slučaju kada dodje do curenja kroz nju, čep 22 može se ubaciti u cev 18. Čep može biti tipa koji je opisan u US patentu ser.br. 173.550 od 3O.jula 1980. i može imati jedan omotač 24 i jedan proširivač 26. Omotač 24 može biti jedan cilindrični deo koji ima konusnu unutraŠnju površinu koja imamidi prečnik pri svom zatvorenom kraju a manji prečnik pri svom otvorenom kraju. Proširivač 26 je ubačen u omotač 24 tako da se pome ran jem proSirivača 26 u odnosu na omotač 24 prouzrokuje proSiriv anje omotača 24 a da se pri tom proširivač 26 ne može izvaditi iz omotača 24. ProSirivač 26 može takodje imati jedan otvor sa unutrašnjim navoj ima za zahvatanje sa navojima 16 na šipki 14 tako da šipka 14 može da zahvati proširivač 26 radi pomeranja proširivača 26 u odnosu na omotač 24.Referring now to Figure 3, a typical heat exchanger tube 18 is held on one carrier 20 in a manner similar to that of a nuclear steam generator. When it is desired to prevent fluid flow through tube 18, as is the case when a leakage occurs therein, the plug 22 may be inserted into tube 18. The plug may be of the type described in U.S. Pat. 173,550 of July 3, 1980, and may have one sheath 24 and one expander 26. The sheath 24 may be a cylindrical part having a conical inner surface having an imide diameter at its closed end and a smaller diameter at its open end. The expander 26 is inserted into the sheath 24 so that the displacement of the expander 26 relative to the sheath 24 causes the sheath 24 to be expanded without the expander 26 being removed from the sheath 24. The expander 26 may also have one hole with an internal thread having for engaging with the threads 16 on the rod 14 so that the rod 14 can engage the expander 26 to move the expander 26 with respect to the sheath 24.

Još uvek pozivajudi se na sliku 3, uredjaj 10 za postavljanje čepova 22 ima jedan klizač 28 koji je klizno postavljen unutar kudišta 12 i može da primi šipku 14. Jedan sklop za opteredivanje, kao što može biti spiralna opruga 30 postavljen je u kudištu 12 1 u kontaktu je sa klizačem 28, a služi da prinudno postavlja kudište 12 u položaj kao ŠD je prikazano na slici 3.Still referring to FIG. 3, the plug-mounting device 10 has a slider 28 that is slidably mounted inside the housing 12 and can accommodate the rod 14. One load assembly, such as a helical spring 30 may be mounted in the housing 12 1 it is in contact with slider 28 and serves to force the housing 12 into position as the WD is shown in Figure 3.

5.5.

Prvi vod 32 povezan je sa kudištem 12 blizu donjeg kraja klizača 28 i služi za uvodjenje nekog fluida, kao što je ulje, u kudište 12. Prvi vod 32 takodje služi i za odvod j en je istog fluida iz kudišta 12. Kada se fluid uvede u kudište 12 kroz prvi vod 32 pod pritiskom od oko 20,5-49,50 MPa, kudište 12 se pomera naniže u odnosu na klizač 28 kao što je prikazano na slici 4.The first conduit 32 is connected to a housing 12 near the lower end of the slider 28 and is used for introducing a fluid, such as oil, into the housing 12. The first conduit 32 is also used to drain the same fluid from the housing 12. When the fluid is introduced into the housing 12 through the first conduit 32 at a pressure of about 20.5-49.50 MPa, the housing 12 moves downward relative to the slider 28 as shown in Figure 4.

Pozivajudi se sada na sliku 4, kada je fluid uveden pod pritiskom u kudište 12 i u prstenastu komoru 34 koja je stacionirana izmedju klizača 28 i kudišta 12, kudište 12 se pomera naniže i od nosača 20 cevi 18 izazivajudi tako sabljanje opruge 30. Fluid u prstenastoj komori 34 može se ispustiti na primer oslobadjanjem pritiska u prvom vodu 32 otvaranjem ventila (nije prikazan) u prvom vodu 32. Kada je pritisak tako oslobodjen, opruga 30 de prouzrokovati pomeranje kudišta 12 naviše u odnosu na klizač 28 vradajudi na taj način kudište 12 u konfiguraciju kao na slici 3.Referring now to Figure 4, when the fluid is introduced under pressure into the housing 12 and into the annular chamber 34, which is stationed between the slider 28 and the housing 12, the housing 12 moves downward and causes the spring 30 to collapse from the carrier 20 of the tube 18. chamber 34 may be dropped, for example, by releasing pressure in the first conduit 32 by opening the valve (not shown) in the first conduit 32. When the pressure is thus released, the spring 30 will cause the housing 12 to move relative to the slider 28 thereby creating a housing 12 in. configuration as in Figure 3.

Kao što je prikazano na slikama 314, šipka 14 nije pričvršdena za kudište 12 niti za klizač 28 tako da šipka 14 može da kllzi i obrde se u odnosu na njih. Ovim je omogudeno da se šipka 14 može navijanjem zahvatati i otpustiti od proširivača 26. štaviše, uredjaj 10 za postavljanje čepova može imati jedan automatski pogonski mehanizam 36, kao što je prikazano na slici 1 koji se može postaviti na uredjaj 10 za postavljanje čepova tako da zahvata šipku 14 i da je automatski okrede u odnosu na proširivač 26. Pored toga, pogonski mehanizam 36 može da drži Šipku 14 u pravilnom položaju u odnosu na kudište 12.As shown in FIGS. 314, the rod 14 is not attached to the housing 12 nor to the slider 28 so that the rod 14 can slide and rotate against them. This allows the rod 14 to be gripped and released from the expander 26. Moreover, the plug-in device 10 may have one automatic drive mechanism 36, as shown in Figure 1, which can be mounted on a plug-in device 10 such that engages the bar 14 and automatically rotates it relative to the expander 26. In addition, the drive mechanism 36 can hold the bar 14 in the correct position relative to the housing 12.

Prsten 38 što može biti cilindrični piezoelektrični uredjaj kao što je model 9041 Kistler Instrument Corporation of Grand Island, New York postavljen je u kudištu 12 oko šipke 14. Prsten 38 povezan je električnim vezama 40 sa instrumentima a služi za indikaciju sile kojom se deluje na šipku 14 sa strane kudišta 12, što je ista sila kojom šipka 14 deluje na proširi6, vač 26 i omotač 24. Tako prsten 38 predstavlja sredstvo poraodu koga se može obezbediti daljinska indikacija i snimanje sile kojom se deluje na Sep 22 što predstavlja potvrdu da je Sep 22 pravilno proširen u cevi 18. Jedan metalni prsten 42 postavljen je oko šipke 14, a u kontaktu je sa prstenom 38, i pričvrščen sa kudište 12 tako da osigurava prsten 38 sa kudište 12. šipka 14 ima jednu prirubnicu 44 koja se pruža oko šipke 14 i postavljena je blizu prstena 42. Kada se kudište 12 tera naniže uvodjenjem fluida u prstenastu komoru 34, prsten 42 dodiruje i prenosi šilu na prirubnicu 44 šipke 14. U isto vreme, prsten 42 letom šilom deluje na prsten 38 Sime se isasiva da prsten 38 stvara i daje jedan električni signal kojim se indiclra amplituda sile. Ovu šilu takodje prenosi šipka 14 do proširivača 26 Sime se proširivač prinudno tera naniže u odnosu na omotač 24 na koji način proširuje oraotač 24. Tako se sila kojom se deluje na proširivač 26 i omotač 24 može odrediti nadgledanjem pritiska fluida u prstenastoj komori 34 i nadgledanjem izlazna prstena 38.Ring 38, which may be a cylindrical piezoelectric device such as model 9041 Kistler Instrument Corporation of Grand Island, New York, is housed in a housing 12 around the rod 14. Ring 38 is connected to the instrument's electrical connections 40 to indicate the force exerted on the rod. 14 on the side of the housing 12, which is the same force by which the rod 14 acts on the expanding 6, the shaft 26 and the sheath 24. Thus, the ring 38 is a means of regeneration which can be provided with a remote indication and recording of the force acting on Sep 22 which is a confirmation that Sep 22 is properly extended in the pipe 18. A metal ring 42 is mounted around the rod 14 and in contact with the ring 38, and secured to the housing 12 so as to secure the ring 38 to the housing 12. the rod 14 has one flange 44 extending around the rod 14 and is positioned near the ring 42. When the housing 12 is lowered by introducing fluid into the annular chamber 34, the ring 42 touches and transmits the spike to the flange 44 of the rod 14. At the same time, the ring 42 acts as a ring on the flywheel 38. It is then sucked out that the ring 38 produces and produces an electrical signal that indicates the amplitude of the force. This rod is also transmitted by the rod 14 to the expander 26. In this way, the expander is forced downwards relative to the sheath 24, thereby expanding the collar 24. Thus, the force exerted on the expander 26 and the sheath 24 can be determined by monitoring fluid pressure in the annular chamber 34 and monitoring output rings 38.

Pozivajudi se sada na slike 2,516, jedan držač 46 postavljen je na gornjem kraju klizača 28 pomodu zavrtnjeva iii sličnih pričvršdivača. Držač 46 takvog je oblika da dodiruje donji kraj omotača 24, a služi za držanje čepa 22 u cevi 18 dok se proširivač 26 pomera naniže pomodu šipke 14. Pored toga na držaču 46 je postavljen senzorski sklop 48 kako bi mogao da dodiruje donji kraj cevi 18. Senzorski sklop 48 sastoji se od kontaktnog dela 50, kao što može biti metalni prekrivaš postavljen na držaču 46 i oko šipke 14. Kontaktni deo 50 može se držati u držaču 46 pomodu više zavrtnjeva 52 tako da svaki zavrtanj 52 ima jednu spiralnu oprugu 54 postavljenu oko sebe. Jedan prekidač 56 postavljen je da dodiruje deo 50 i ima jedan kontakt 58 koji dodiruje jedan ispušteni zavrtanj 60. Zavrtanj 60 je ispušten u držaču 46 i predstavlja način za podešavanje kontakta 58 Zavrtnjem 60 uvUanjem zavrtnja 60 u držač 46. Spiralne opruge 54 teraju kontaktni deo 50 i prekidač 56 od ploče 62 ali su ograniČeni zavrtnjima 52 tako da je pomeranje kontakta 58 i prekidača 56 u odnosu na zavrtanj 60 ograničeno. Ovo ograničeno pomeranje omogučava da kontakt 58 dodiruje zavrtanj 60 i zatvara električno kolo prekidačem 56 kada kontaktni deo 50 dodiruje dno cevi 18 kao što je prikazano na slici 6. Prekidač 56 povezan je sa instrumentima koji su udaljeni od ovoga mesta električnim vezama 64 indicirajuči radnom osoblju da je takav kontakt ostvaren. Odnos senzorskog sklopa 48 i držača 46 je takav da omogučava radnom «oblju potvrdu da je senzorski sklop 48 dodirnuo kraj cevi 18. Kada dobiju potvrdu da je senzorski sklop 48 doSao do kraja cevi 18 radno osoblje koje je udaljeno od uredjaja 10 za postavljanje čepova može biti sggurno da je čep 22 potpuno postavljen u ce vi 18 pre nego što se čep 22 proširi daljinskim aktiviranjem uredjaja 10 za postavljanje čepova. Potvrd ji vanjem da je čep 22 pravilno postavljen u cevi 18 pre nego što se čep 22 proširuje sprečava da se čep 22 proširuje kada nije pravilno postavljen u cevi 18, sprečavajuči tako oštečenje cevi 18 iii pogrešno postavljanje čepa 22 što bi moglo da ima za posledica curenje. Ova prednost ima posebnu vrednost kada se uredjaj 10 za postavljanje čepova koristi u opasnim okolnostima kao što je u nukleamom parnem generatoru gde radioaktivna okolina ograničava pristup oblasti rada.Referring now to Figures 2,516, one holder 46 is mounted on the upper end of the slider 28 by means of screws or similar fasteners. The holder 46 is such that it touches the lower end of the sheath 24 and serves to hold the plug 22 in the tube 18 while the expander 26 is moved downward by a rod 14. In addition, a sensor assembly 48 is mounted on the holder 46 so that it can touch the lower end of the tube 18 The sensor assembly 48 consists of a contact portion 50, such as a metal cover mounted on the holder 46 and around the rod 14. The contact portion 50 can be held in the holder 46 by multiple screws 52 such that each screw 52 has a single helical spring 54 mounted around. One switch 56 is set to touch part 50 and has one contact 58 that touches one dropped screw 60. The screw 60 is discharged into the holder 46 and is a way to adjust the contact 58 By screwing 60 by inserting the screw 60 into the holder 46. The coil springs 54 force the contact part 50 and switch 56 of plate 62 but are limited by screws 52 such that the movement of contact 58 and switch 56 relative to screw 60 is restricted. This limited displacement allows the contact 58 to touch the screw 60 and close the electrical circuit with the switch 56 when the contact portion 50 touches the bottom of the pipe 18, as shown in Figure 6. The switch 56 is connected to instruments away from this place by electrical connections 64 indicating work personnel that such contact was made. The ratio of the sensor assembly 48 to the holder 46 is such that it allows the operating assembly to confirm that the sensor assembly 48 has touched the end of the pipe 18. When they receive confirmation that the sensor assembly 48 has reached the end of the pipe 18, working personnel away from the plug-in device 10 may it must be ensured that the plug 22 is fully positioned in ce 18 before the plug 22 is extended by remote actuation of the plug-in device 10. Confirming that the plug 22 is properly positioned in the tube 18 before the plug 22 expands prevents the plug 22 from expanding when not properly positioned in the tube 18, thus preventing damage to the tube 18 or misplacement of the plug 22, which could result leakage. This advantage is of particular value when the plug-in device 10 is used in hazardous circumstances such as in a nuclear steam generator where the radioactive environment restricts access to the area of operation.

Pozivajuči se sada na sliku 7, prsten 38 električno je povezan sa električnim vezama 40 sa elektromagnetskim pojačavačem 70 što može biti model 504E proizvodjača Kistler Instrument Company. Elektromagnetski pojačavač 70 povezan je sa modulom 72 za registrovanje i držanje vršne vrednosti signala kao što je model AP4570-251 proizvodjača Action Instruments Company koji je pak povezan sa meračem 74. Ovakvom instruraentacijom j omogučeno da se sila kojora se deluje na natezni prsten 38 pre tvori u vizuelno očitavanje ha meraču 74 tako da operator ima potvrdu o sili kojom se deluje na čep 22.Referring now to Figure 7, the ring 38 is electrically connected to the electrical connections 40 by an electromagnetic amplifier 70, which may be a model 504E of the manufacturer Kistler Instrument Company. An electromagnetic amplifier 70 is coupled to a module 72 for recording and holding a signal peak, such as model AP4570-251 from Action Instruments Company, which is in turn connected to meter 74. This instruction j enables the force exerted on the tension ring 38 to be formed before into the visual reading of the meter 74 so that the operator has a certificate of force acting on the plug 22.

Pozivajuči se sada na sliku 8, prvi vod 32 povezan je sa primopredajnikom pritiska 76 što može biti model 204E proizvodja ča Setra Systems, Inc., koji je povezan sa meračem 78 koji reReferring now to Figure 8, the first conduit 32 is connected to a pressure transceiver 76, which may be model 204E of Setra Systems, Inc., which is connected to meter 78 which re

8.8.

giatruje i zadržava vršnu vrednost kao Sto je model AP4570258 proizvodjača Action Instruments Company koji je povezan sa meračem 80. Ova instrumentaclja obezbedjuje vl2uelno očitavanje pritiska koji postoji u prvom vodu 32 i u prstenastoj komori 34 od strane operatora. Očitavanja pritiska na meraču 80 mogu se koristiti za odredjivanje sile kojom se deluje na Sep 22 pritiskom u prstenastoj komori 34. Tako se uporedjivanjem očitavanja na meraSu 80 i meraču 74, od strane operatora može verifikovati da se pravilnom šilom delovalo na čep 22 što predstavlja potvrdu da je čep 22 pravilno proširen u cevi 18.hydrates and retains a peak value such as the model AP4570258 from Action Instruments Company connected to meter 80. This instrument provides the pressure reading that exists in the first conduit 32 and in the annular chamber 34 by the operator. The pressure readings on meter 80 can be used to determine the force exerted on Sep 22 by pressure in the annular chamber 34. Thus, by comparing the readings on meter 80 and meter 74, the operator can be verified that the correct pin acted on the plug 22, which is a confirmation that plug 22 is properly expanded in tube 18.

Pored toga, uredjaj 10 za postavljanje čepova mo S e biti opremljen instrumentacijom kao što je linearni promenljivi transformator difereneijalni za indiciranje dužine putovanja prošlri\ača 26 u odnosu na omotač 24.In addition, the plug-in unit 10 may be equipped with instrumentation such as a linear variable transformer differential to indicate the travel length of the spreader 26 relative to the sheath 24.

Kada je potrebno začepiti cev 18 izmenjivača toplote sa ceviraa kao što je slučaj u nuklearnom parnom generatoru, čep kao što je čep 22 mično se navrti na navoje 16 šipke 14 dok dno čepa 22 ne dodirne držač 46. Potom operator ubacuje šipku 14 sa čepom 22 koji je na nju pričvrščen u cev 18 tako da je kontaktni deo 50 u dodiru sa dnom cevi 18 kao što je prikazano na slici 3. Kada se dodje u ovu konfiguraciju, kontakt 58 prekidača 56 če se polako otpustiti čime če aktivirati prekidač 56 koji vizuelno iii zvučno daje do znanja operatoru iii drugom radnom ceoblju koje može biti udaljeno od uredjaja 10 za postavljanje čepova da je čep 22 pravilno postavljen u cevi 18. Ako kontaktni deo 50 ne dodiruje cev 18, prekidač 56 neče biti aktiviran što če naznačitl operatoru ill ostalima da se čep treba ponovo postavljati u cev 18.When it is necessary to plug the tube 18 of the heat exchanger from the tube as in the case of a nuclear steam generator, a plug such as plug 22 is threaded firmly on the threads 16 of the rod 14 until the bottom of the plug 22 touches the holder 46. The operator then inserts the rod 14 with the plug 22 attached to it in tube 18 so that the contact portion 50 is in contact with the bottom of the tube 18 as shown in figure 3. When added to this configuration, contact 58 of switch 56 will slowly release, thereby activating switch 56 which visually iii acoustically informs the operator iii of another working tube that may be away from the plug-in unit 10 that the plug 22 is correctly positioned in tube 18. If contact portion 50 does not touch tube 18, switch 56 will not be activated indicating the operator or others that the plug should be reinstalled into tube 18.

Ako prekidač 56 daje pozitivnu indikaciju da je čep 22 pravilno postavljen u cevi 18, operator iii ostali če pustiti fluid kao što je ulje da udje kroz prvi vod 32 pod pritiskom od oko 20,60-49,50 MPa u prstenastu komoru 34 čime se kučište 12 pomera naniže u odnosu na cev 18 dok operator iii daljinski upravljana oprema drži kučište 12. Pritisak koji se tako ostvaruje može se pročitati na meraču 80 od strane operatora. Pomeranje kučišta 12 naniže prouzrokuje da prsten 42 deluje istom šilom na prirubnicu 44 šipke 14. Ova sila se takodje prenosi i do prstena 38 i indicira se na meraču 74. Na ovaj način sila kojom se deluje na šipku 14 pritiskom u prstenastoj komori 34 može biti odredjena očitavanjem i poredjenjem rnerača 74 i 80 verifikujudi tako šilu kojora se deluje na šipku 14. Sila kojom se deluje na prirubnicu 44 šipke 14 prenosi se do proširivača 26 čiroe se izaziva pomeranje proširivača 26 naniže u odnosu na omotač 24 pošto se omotač 24 drži na mestu pomodu držača 46. Ovo pomeranje izaziva proširivanje čepa 22 do zaptivanja cevi 18 čime se sprečava proticanje tečnosti kroz cev 18.If the switch 56 gives a positive indication that the plug 22 is correctly positioned in the pipe 18, the operator or others will allow a fluid such as oil to enter through the first conduit 32 at a pressure of about 20.60-49.50 MPa into the annular chamber 34, thereby the housing 12 moves downward relative to the tube 18 while the operator or remote controlled equipment holds the housing 12. The pressure thus generated can be read on the gauge 80 by the operator. Moving the housing 12 down causes the ring 42 to act on the same pin on the flange 44 of the rod 14. This force is also transmitted to the ring 38 and indicated on the meter 74. In this way, the force exerted on the rod 14 by pressing in the annular chamber 34 can be determined by reading and comparing the runners 74 and 80, thus verifying the force acting on the rod 14. The force exerted on the flange 44 of the rod 14 is transmitted to the expander 26 which causes the expander 26 to be displaced relative to the sheath 24 as the sheath 24 is held at This displacement causes the plug 22 to expand to seal the tube 18, thereby preventing fluid from flowing through the tube 18.

Kada je čep 22 proširen u cevi 18, šipka 14 se može osloboditi od proširivača 26 odvrtanjem šipke 14 odatle. Ovo se može izvršiti ručno iii automatski pomodu pogonskog mehanizma 36. Kada se šipka 14 odvrne od proširivača 26, postupak postavljanja čepa 22 je završen.When the plug 22 is expanded in the tube 18, the rod 14 can be released from the expander 26 by unscrewing the rod 14 from there. This can be done manually or automatically by the drive mechanism 36. When the rod 14 is unscrewed from the expander 26, the process of installing the plug 22 is completed.

Stoga, može se videti da ovaj pronalazak obezbedjuje jedan poboljšani uredjaj 10 za postavljanje čepova kojim se čep može brzo postaviti u cev 18 i koji može verifikovati pravilno postavljanje čepa 22.Thus, it can be seen that the present invention provides an improved plug-in device 10 for fastening the plug into the tube 18 and verifying the correct placement of the plug 22.

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NAVOD Ο NAJBOLJEM NAČINU ZA PRIVREDNU UPOTREBU PRIJAVLJENOG PRONALASKAGUIDANCE Ο THE BEST WAY TO ECONOMICLY USE THE APPLICATION FOUND

Uredjaj prema pronalasku izradjuje se . najbolje na sledeči načiniThe device according to the invention is being made. best in the following ways

Kao čep 22 upotrobljava se več poznati čep izradjen prema US patentu 173*550. Klizač 28, kao i držač 46 Izradjuju se od pougljeničenog Čelika, šipka 14 izradjuje se od Čelika iste vrste kovanjem, a navoji 16 izradjuju se rezanjem i potom fino obradjuju. Prstenasta komora 34 ispunjava se uljem pod pritiskom od 20-50 MPa, kroz vod 32 koji se uzima kao gotov proizvod na tržištu. Spiralne opruge 30 1 54 Izradjuju se od opružnog Čelika, Prsten 38 izvodi se kao piezoelektrični uredjaj, i uzima kao gotov proizvod na tržištu, model 9041 firme Klstler Instruments Corp., Elektromagnetni pojačivač 70 se uzima kao model 504E firme Kistler Ins tr. Corp. Modul 72 se uzima kao model AP 4570-251 firme Aetion Instruments Comp., a merač 78 kao model AP 4570-258 iste firme. Merači 74 1 80 uzimaju se kao standardni voltmetrl na tržištu. Primopredajnik pritiska 76 uzima se kao model 204E firme Setra Systems, Ino.The plug 22 uses the already known plug made according to US patent 173 * 550. The slider 28 as well as the holder 46 are made of carbon steel, the rod 14 is made of steel of the same type by forging, and the threads 16 are made by cutting and then finely machined. The annular chamber 34 is filled with oil at a pressure of 20-50 MPa, through conduit 32 which is taken as a finished product on the market. Spiral springs 30 1 54 Made of spring Steel, Ring 38 is made as a piezoelectric device and taken as a finished product on the market, model 9041 by Klstler Instruments Corp., Electromagnetic amplifier 70 is taken as model 504E by Kistler Ins tr. Corp. Module 72 is taken as model AP 4570-251 by Aetion Instruments Comp., And meter 78 as model AP 4570-258 by the same company. Meters 74 1 80 are taken as the standard voltmeter on the market. Pressure transceiver 76 is taken as model 204E by Setra Systems, Ino.

Dimenzije pojedinih sestavnih delova uredjaja su sledeče: Radni deo šipke 14 je 13,5 cm dugačak , a navoj 16 ima prečnik 4,6 mm. Kučište 12 ima visinu 7 cm, a širinu 6 can. Držač 46 je 19 x 20 mm. Višina opruge 30 u početnom (nesabijenom) položaju je 38 mm. Prsten 38 je 30 x 10 mm, prsten 42 je 39 x 1,8 mm.The dimensions of the individual components of the device are as follows: The working part of the rod 14 is 13.5 cm long and the thread 16 has a diameter of 4.6 mm. The housing 12 has a height of 7 cm and a width of 6 can. The holder 46 is 19 x 20 mm. The spring height 30 in the initial (unrestrained) position is 38 mm. Ring 38 is 30 x 10 mm, Ring 42 is 39 x 1.8 mm.

Za WESTINGHOUSE ELECTRIC CORP.,For WESTINGHOUSE ELECTRIC CORP.,

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Claims

PATENT APPLICATION

1. A plug-in arrangement for the heat exchanger tube, characterized in that a slide (28) is slidably displaced in the housing (12) in which the rod (14) is pivotally coupled to the automatic drive mechanism (36). wherein a holder (46) with a sensor assembly (48) is attached at the upper end of the slide (28), the contact parts (50) of which are arranged around the Rod (14).

Device according to claim 1, characterized in that the contact parts (50) touch the switches (56), which are screwed in through the parts (50) attached to the holder (46), around which spiral springs (54) are mounted .

Device according to claims 1 111 2, characterized in that a ring (38) is attached to the housing (12) which touches the rod (14).

Device according to claim 3, characterized in that the ring (42) is arranged adjacent to the ring (38) and around the rod (14).

Device according to claim 3 14, characterized in that the electromagnetic amplifier (70) is connected to a ring (38) and a module (72) connected to the meter (74).

For WESTINGHOUSE ELECTRIC CORP., Dealers:

IX

PLUG INSTALLATION

The plug-in arrangement comprises a mechanism for moving a closed inner extender (26) relative to the plug (24) in which it is closed thereby extending Sep (24) to contact with the tube or its inner surface (18) in which it is mounted. The apparatus further comprises a sensor mechanism (50) which determines that the plug (24) is correctly positioned in the tube (18) before extending the plug (24) to prevent improper expansion of the plug (24). The device may also have pressure measuring devices (38) for reducing and verifying that the correct amplitude of the force has an effect on the extender (26).

Figure 3.

BRIEF CONTENTS OF THE PRONAiASKA SUBSTANCE

The invention relates to a device for installing plugs in a tube of a heat exchanger, especially in nuclear reactors, which seals the tube at length while allowing the plug to be removed easily. The dredge works in such a way that the Thread 14 with the threads 16 is freely movable in the clamp 28 in the housing 12 of the device. At the end of the slide 28, a retainer 46 is attached to which a sensor assembly 48 is mounted, which allows the bar 14 to be centered exactly in the tube 18, after which the plug 22 is expanded by rotating the bar 14 in the plug extender 26 of the plug 22.

For WESTINGHOOSE ELECTRIC CORP. 2/20/2005

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