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    • 专利摘要:
    lt) _17- Summary The invention reiates to a method for testing tubuiar objects, in particular papercores, where the tubuiar object to be tested is received by a testing device 1 in anapparatus to use said method, and where the testing device 'i consists of at ieast aband loop 2, the testing device 'i is applying radiai pressure to the tubular object,where the pressure is caused by puiiing the band loop 2, and the pressure is in-creased until the testad final pressure is reached or the object is darnaged. A tubuiarobject is inserted in the band loop so that the inner surface of the band loop contactsthe cuter surface of the tubuier object. The band loop can be adjusted to any diame-ter of the tubular object, in particular different wall thicknesses can be tested. Thus,the pressure resistance of different tubuiar objects can be compared. Furthermore,the band loop applies radiai pressure eveniy on the outer surface of the tubuiarobject. As soon as the tubuiar object cannot withstanci the applied pressure anymoreit at least partialiy coilapses. After this coliapse the testing proceciure is canceiied andthe withstood maximum pressure is recorded. This record can be used to improve the radiai pressure resistance of the tubular object and in particular of paper cores.
    公开号:SE1150809A1
    申请号:SE1150809
    申请日:2011-09-08
    公开日:2013-03-09
    发明作者:Mikael Foernaes
    申请人:Stora Enso Oyj；
    IPC主号:
    专利说明:

    Method and apparatus for pressure testing tubuiar objects The invention reiates to a method for testing tubuiar objects, in particular papercores, where the tubuiar object to be testad is received by a testing device and anapparatus to use said method.
    Tubuiar objects have to withstand high exposure and impact depending on theirfuture use. For paper cores in particuiar, it is important to withstand high radiaipressure, thus having a high pressure resistance. Paper cores are used to storemateria! therecn and have a wide variety of appiications. One is for instance in thepaper industry where raw paper for newspapers, packaging or for making cardboardis vvound up on paper cores. in these appiications the raw papers couid have widthsof 1G meters and more, where the tota! ioad on a paper core is ß tons and more.Thus, these tubuiar objects aiso face high impacts during transport of very heavymateria! wound up on it. Other appiications for paper cores are for winding up foiis,fiims, threads or yarns and textiies or other tabrics, wherein in some cases thememory effect on the wound up piastic materials, often due to shrinkage of themateria! previousiy winded, has to be considered, as it can iead to a necking of thetubuiar object and thus, to additionai radiai pressure. Furthermore, in these applica-tions the foii fiims, threads, etc. are wound upon the tubuiar objects, in particuiar thepaper cores, at a very high speed and cause therefore iarge impacts and radiaipressure exposure. in addition, the tubuiar objects are tacing high impacts during winding down the materia! at particuiariy high speeds, As of the high impact and radiai pressure exposure of said tubuiar objects, standar-dized tests have to be run in order to make sure a certain radiai pressure resistanceis given. Due to the imparted ioading of the paper cores, it is necessary that themanufacturers of such tubuiar objects perform quaiity assurance and insure certainpressure resistance properties to their customers. For this purpose, the cuter surfaceof said tubuiar object is ioaded with pressure and the radiai pressure resistance is tested.
    TG Testing methods are known, in which the tubuiar objects are directly loaded by ahydrauiio fiuid. Due to the high pressure, which has to be imparted, however, thereare recurring problems regarding a reliable seaiing and furthermore it cannot be ruled cut that due to the direct contact with the hydraulic fluid large errors occur.
    From DE 603 ut) 993 T2, a method is known in which the tubuiar object to be testedis received in a cyiindricai pressure chamber, whose interior diameter is much largerthan the component to be tested. An intermediary cavity is fiiied with small balls,which are pressurized on the outside in order to impart an even pressure onto thesurface of the tubular object to be tested. in order to prevent a direct contact of thepressure means with the balls and with the component to be tested, a rubber mem-brane is provided onto which the pressure is imparted and by which the pressure isimparted on the balls, which contact the surface of the tubuiar objects. in order toachieve a sufficient tightriess, it is thus required to fiii the existing pressure cavityafter inserting the tubuiar component, and to seal the cavity, so that the impartedpressure only impacts the balls provided therein. lt has thus proven to be detrimentalthat the complexity of assembling and disassembiing the test apparatus is very high,so that only few tubular components can be tested by the same testing apparatus in adequate time.
    DE 'itl 2906 023 110 Bs describes a method for testing tubuiar objects, in particularpaper cores, in a cyiindricai pressure chamber. The tubuiar object to be tested isreceived in a pressure chamber, which is comprised of a hoiiow cylinder with apressure sheii. The pressure sheil is supported by the hciiow cylinder, wherein anexpansion of the pressure sheii in a radiai outward direction and in an axiai directionis limited. The pressure sheli is ioaded with pressure means, so that the inner surface of the pressure sheii is eveniy applied to the surface of the object.
    A major disadvantage of the state of the art is that all require a pressure chamber inwhich the tubular object has to be placed in. This means, as the paper cores can have a length of up to 10 or more meters, the tubuiar object has to be cut in order to _3.. fit into the chamber. The cutting process may aiso damage the stabiiity and aiter thepressure resistance of the vvound paper core. Therefore, it is hard to teii what actuaiiy is the proper radiai pressure resistance of the testad paper core or tuhuiar object.
    Furthermore, a disadvantage in the state of the art is that pressure means of somesort are needed to appiy pressure on the outer surface of said tubuiar objects orpaper cores. The pressure means are received by a pressure sheii. Therefore, it ispossibie that ieaks in the pressure sheii occur. This can on one hand cause errors inthe testing data and on the other hand can aiso damage the testing device, thusieading to extended downtimes of the testing device and aiso causing high mainten- 85166.
    Furthermore, the known testing devices are cornpticated in its nature and expensiveto assernbie and rnaintain in generai. The pressure sheii, the pressure means, andthe pressure chamber aii need to be buiit to withstand high pressures and need to bemaintained in order to do so. Thus, these are causing high costs to test tubuiar objects and their radiai pressure resistance. therefore, it is the task of the present invention to simpiify the test method in order toovercome the disadvantages of the state of the art, in addition to substantiaiiy improve handiing.
    According to the invention a method for testing tupuiar objects is provided to solvethe task, where the tubuiar object to be tested is received by a testing device, and where - the testing device consists of at ieast a band Boop, - the testing device is suppiying radiai pressure to the object, where the radiaipressure is caused by puiiing the band ioop, and - the radiai pressure is increased untii the tested finai pressure is reached or the object is damaged. 3G _4_ Further additionai advantageous embodiments of the invention can be derived from the dependent ciaims.
    The method according to the invention is characterized in that the tubuiar object isreceived by a testing device. The testing device is cornprised in principai of at ieast aband loop, preferabiy of a rnetai band ioop. A tubuiar object is inserted in the bandioop so that the inner surface of the band ioop contacts the outer surface of thetubuiar object. The band ioop if necessary can be tightened in order to oniy touch theouter surface of the tubuiar object. At this stage no pressure is appiied yet. Hoi/vevar,the band ioop can be adjusted to any diameter of the tubuiar object, in particuiardifferent wait thicknesses of the tubuiar objects can be tested. Thus, the radiaipressure resistance of different tubuiar objects can be compared. This is particuiariyinteresting as especiaiiy paper cores can be wound in many different ways. As thetesting device is easiiy adjustabie many different paper cores with varying number of iayers, paper thicknesses, etc. can be testad. in a foiiowing step, the testing device is appiying pressure to the tubuiar object,where the pressure is caused by puiiing the band ioop. Therefore, a puiiing device isattached to one or both ends of the band ioop. By puiiing the band foop the iooptends to shrink its diameter and therefore, appiy radiai pressure on the outer surfaceof the tubuiar object. Furthermore, the band ioop appiies pressure eveniy on theoutar surface of the tubuiar object as the shrinkage of the ioop is even over the entire circumference of the band ioop.
    The tubuiar object prevents the band ioop to shrink and narrovv its diameter whiie acounteracting force is acting against the puiiing force and the caused radiai pressurethereof. As soon as the tubuiar object cannot vvithstand the appiied radiai pressureanymore it at ieest partiaiiy coiiapses. Thus, the counteracting force suffers a suddendrop. The sudden drop in the counteracting force is detectabie and indicates damageto the tubuiar object. The damage can be totai coiiapse of the tubuiar object or cracksor dents in the outer surface. The damage may aiso be on the inside of the object.
    Hovvever, any damage of such sort causes the counteracting force to drop suddeniy.
    UI -5..
    After a sudden drop is detected the testing procedure is canceiied and the vvithstoodmaximum radiai pressure is recorded. This record can be used to improve the radiai pressure resistance of the tubuiar object and in particuiar of paper cores. in a further step, a controiied pressure increase is performed by further and harderpuiiing on the band ioop untii the end pressure to be tested is achieved. Thus, thestabiiity of the tubuiar object is assured or damage cccurred. if damage of the tubuiarobject occurs, the required radiai pressure resistance is not provided, however, if themaximum end pressure is reached and recorded accordingiy, the tubuiar object haspassed that portion of the ouaiity test. The test resuits can be further used as a ouaiity certificate for customers. it is a particuiar advantage of this method according to the invention that an ex-change of the tubuiar object is possibie in a short time, since e.g. oniy adrnissionreiieve is required in order for the tubuiar object to be abie to move freeiy again withinthe band ioop. After suppiying another tubuiar object, another test can immediately be performed without reguiring compiex seaiing measures.
    Another advantage of the test apparatus according to the invention is, that nociamping at the end of the test is required and the iength of the surface to be testadcan be much iarger. Thus, oniy the iength of the testing device is reievant, and it canbe sized accordingiy. By this type of ciamping, it is assured in particuiar that thetubuiar object, e.g. a paper core, peiforms iike in a subsequent appiication, and goesthrough distortions or compressions due to the pressure of ioading, which extendover the entire actuai iength of the tubuiar object. Possibie weak spots can iead to adestruction of the tubuiar object. Thus, such a test is very reaiistic and furthermoredue to the simpiicity of the test, assembiy can be performed quickiy and in a fiexibie mäftfiêf".
    A further advantage of the testing device is that the device can be buiid iong, usingthe configuration according to the invention. Thus, tests can be performed absoiuteiy reaiisticaiiy. Furthermore, the testing device faciiitates detecting iength and diameter It) 2G _g_ changes to the pressure increase, so that the typicai behavior ot the tubuiar object tobe tested can be determined betore destruction occurs. Typicaiiy, when the radiaipressure increases initiaiiy a iinear rise occurs betore the point ot tracture is reachedetter an asymptotic course ot the characteristic diagram. Thus, this is a typicaibehavior of a vvound tubuiar core during a reguiar appiication, if said core was sized too weak.
    A further advantageous embodiment aiiows the inner diameter to be rnonitoredduring pressure loading. in order to record the stabiiity of the shape during thepressure admission, shape changes ot tubuiar objects need to be monitored. Thus,there is the possibiiity to monitor icngitudinai changes to the tubuiar object, in orderto aiso record said change ot shape. Furthermore by means ot an additionai rotatingdevice, the concentricity ot the tubutar object can be tested. This measure is otparticuiar importance tor fast rotating tubuiar objects, since a smaii imbaiance of thetubuiar object can cause great distortion during rotation, in particular during very test rotation.
    Furthermore, a particular advantage of the method according to the invention is thata surface test ot the tubutar object can be performed simuitaneousiy. in many casesthe paper cores are provided with a tinish layer, which heip prevent damages to themateriais to be wound upon. The tinish Bayer can thus cornprise a ditterent iayerthickness and it is adapted to the respective appiication. When tor instance toiis areto be vvound upon paper cores, they must not be darnaged and tor this reason a sotttinish iayer is vvound on. With the present test method, there is the option to measurethe change ot the surface during radiai pressure adrnission untii the tinai pressure isreached. it the surface has gone back to its originai shape in a tiat and eiasticmanner, damages to the rnateriai to be vvound up can be ruied out. i-iowever, Whenthe surtace has uneven spots due to the radiai pressure admission, or when thesurface tends to torm cracks, there is a risk that materiais wound upon are aisodarnaged. For the method according to the invention, thus there is the option during the test to sirnuiate certain radiai pressures and to test respective surface condition.
    ZÛ 3G _7_ A further increase up to a maximum pressure is aiso possibie so that atready eariy on a deformation of the surface can be detected. in order to form the band toop from the originat band, the band ioop can form apressure steeve or an open toop. in this case the band ioop forms the pressuresieeve by buiiding a pocket and constrains the pocket through a meta! strap. Forinstance, tt is possibie to feed the band ioop through an opening in a metai bott andfeed it back through the same or a separate opening in the opposite direction. Byputting on one end of the band ioop, the formed pocket ts tending to shrink and providing a pressure sieeve in form of an open ioop. in another embodiment of the invention, the band ioop forms a pressure steeve,wherein one end of the band ioop is partiaiiy reduced and the other end cornprisesan opening where the reduced end is puiied through the opening to form the pres-sure sieeve. in this embodiment no addittonai strap is needed to ntaintain the formedpocket. However, the band ioop needs to provide a proper opening to feed throughthe reduced end. By puiitng the reduced end of the band ioop, the formed pocket acts as a pressure sieeve and shrtnks accordingty.
    The durabtiity of said band ioop is thus configured for a piuraiity of tests, white thedevice furthermore characterized in the tubuiar objects to be tested can be easiiyinserted into the testing device from both sides, and can thus be removed again with the same ease. in a further advantageous embodtment, the band ioop comprtses on one end or onboth ends a puiiing device. in order to appty pressure on the outer surface of thetubuiar object, the formed pressure sieeve needs to shrink in diameter. For thisshrinkage the band ioop is putied on one or both ends. therefore, a putiing device isattached to one or both ends of said band ioop. The putiing device can be a feed-through of the band ioop comprtstng drums between which the band ioop ts forcedthrough. Atternativeiy, a tractor feed can be used, where the drums comprise protru- sions and the band ioop corresponding recesses. One particuiar embodiment uses a ..g.. friction feed, where the band ioop is sgueezed through in-betvveen tvvo drums.Furthermore, the band ioop can be stationary attached to the puiiing device, where the puiiing device moves upvvard aiong a rack it is mounted on. in a further embodiment, the testing device comprises a frame whereat the band ioopis attachabie and Which cornprises fixing devices. The frame is supporting the bandioop where the pressure sieeve is formed within the frame. One end of the band ioopcan be attached to the frame using said fixing devices. in an advantageous embodi-ment the frame is as wide as the end of the band ioop to be attached to it. The bandioop is fed through an opening in the frame and in order to form the pressure sieevefed again through the same or a separate opening out of the frame. By using theframe, an open ioop can be formed without using a constraining metai strap as theframe is supporting the band ioop. Aiso a pressure sieeve can be formed whereinone end of the band ioop is partiaiiy reduced and the other end comprises anopening and where the reduced end is puiied through the opening to form said pressure sieeve. in one embodiment of the current invention, the frame is stationary and one end ofthe band ioop is attached to the frame Where the other end is attached to a puiiingdevice. in this embodiment the pressure is appiied by puiiing the band ioop. inanother embodiment the band ioop is stationary attached on one end and on theother end attached to the frame, which is mobiie. in this particuiar embodiment, apuiiing device is attached to the frame. i-iere the frame is mounted moveabiy on arack. By moving the frame aiong the rack, a force is appiied to the band ioop in a waythat the pressure sieeve is shrinking its diameter and applying pressure on an inserted tubuiar object. in a further embodiment, a puiiing device is attached to a free end of the band ioopand the frame is attached to an additionai puiiing device. in this embodiment theappiied pressure is caused by puiiing on both the band ioop and the frame. A similarembodirnent is aiso possibie without a frame, Where on both ends of the band ioop a puiiihg device is attached. ti) in order to provide an even pressure transfer from the pressure sieeve to the tubuiarobjects, the pressure sieeve cornprises an intet made of piastic, rubber, or any simiiarmaterial. it might be possibie by forming said pressure sieeve that the pressure isreiativeiy uneven, for instance With an open ioop at the end where both ends of theband ioop are coming back together. By using an iniay, the radiai pressure admission is indirect and can even out changes of pressure aiong the circumference.
    A suitabie materiai to form an iniay would be rigid enough to even out said differenc-es aiong the circumference but soft enough to actuaiiy transfer the pressure onto thetubuiar object. in order to vvithstand high pressures and forces the frame, fixing device and in particuiar the band ioop are made of metai. Üuring the testing process, it is provided in another configuration of the invention thatthe pressure buiid-up is continuousiy monitored, wherein a certain pressure drop isimntediateiy detected, which indicates damage to the tubuiar object. As soon as thepaper sieeve cannot bear the pressure ioading any more deformation occurs, so thatnot oniy the surface but aiso the vvaii thicitness and the present geometry areirnpaired. Furthermore, there is the possibiiity to monitor and to record the diameterand aiso the iongitudinai change of the tubuiar objects by sensors, so that theoccurring shape changes, which are aiso undesirabie, do not exceed a typicaitoierance dimension. Aii recorded measurement vaiues can thus provide quaiityassurance for a certain tubuiar object combined in a protocoi, vvherein said tubuiar object compiies requirements as the test has been passed.
    Preferabiy an eiectronic controi unit, in particuiar a computer-based controi unit, canbe used for the testing device, which does not oniy monitor the sensors and receivesand stores the measurement values but aiso controis the radiai pressure admission,Whereupon reciuirement the transmission of the storeci data to a data storage device or to a superimposed communication unit is performed. tt) _19- Furthermore, there is the possibility that in case of a sudden drop of the counteracting force as ot damage te the tubuier object an opticai andíer acoustic signai genera-tor is activeted. it is immedieteiy evident to the test operetor, independent from theeiectronic centret unit, that the test process can be eborted, es the tubuier object hesnet sustained the Heads. Additionaiiy, further sensors in the form of foiis or measure-ment strips can be provided on the surface ef the tubuier objects in order te monitor the surface ioeding. it is provided in a particuiar configuration that the testing device oomprises a shatt,which is supported by support eiements, and comprises e hand wheei, wherein thesensors ere rotatienaiiy connected to a shatt. By means of the snett, the concentricitycan be tested before and efter the pressure test hes been performed, which hes tebe considered in particular ter fest running print pressas. As a high ievei ct concen- tricity is criticai for these eppiications.
    Thus, it can be steted in summary that through the method according to the inventionand the device provided for performing the method a piuraiity of tubuiar objects canbe tested within e short period of time with respect te pressure resistance. Themethod aiiows a quick exchange of tubuier objects without the need for cornpiex seaiing measures, threeded connection, etc.
    The invention is furthermore described in mere detaii based en the figures, wherein the iiiustretfed embodiment does not restrict the scope of the inventien, and wherein Figfi iiiustrates the method according to the invention for testing the pressure resistance of e tubuier object in a sectionai top view; Figâ iiiustrates e front view of the device according to Fig. t in a different embediment; and Figß iiiustrates the method according to the invention for e device mounted without e frame. _11- Shown in Fig. 1 the testing device 'i consists of a band ioop 2 and a frame 3. in orderto form the pressure sieeve 4, the band ioop 2 is attached to the frame 3 on one end“i1 with a fixing device 6. The band ioop then is fed through an opening 10 in order toform said pressure sieeve 4 and to be fed through the opening 10 again. The pres~sure sieeve 4 is provided with an iniay 5 to protect the inserted tubuiar object and toappiy even pressure on the circumference of the tubuiar object. The tubuiar object isto be inserted in the pressure sieeve 4 and heid by the iniay 5. Tubuiar objects to betested can be used in any given iength, no shortening or destruction is necessary toperform tests. it is important the iength of the tubuiar objects is the same if the resuitsof the tests shouid be compared. in this particuiar embodiment the frame 3 consistsof a front frame part 14 and a back frame part 15. The two separate parts are heidtogether by two upper bars 7 and one iower bar 3, which are attached to each part byusing boits 12. The frame 3 shown here is just one particuiar embodiment and doesnot restrict the scope of the invention. The band ioop 2 is attached on one end 11 tothe frame 3 and is connected on the other end to a puiiing device, not shown in thisiiiustration. i-iowever, the frame is mounted eg. on the floor or the ceiiing by usingthe mount 9 and the mounting boits 13. The puiiing device puiis on the band ioop 2 inorder to fighten the pressure sieeve 4 and appiy radiai pressure via the iniay 5 on theinserted tubuiar object. The puiiing device keeps on puiiing further and harder untiithe finai pressure to be tested is reached or the tubuiar object is damaged. Thepressure sieeve 4 is further equipped with sensors to detect damage to the tubuiarobject but damage can aiso be determined by a sudden drop in the counteractingforce that withstands the force suppiied by the puiiing device. Anyhow, if damage tothe tubuiar object is detected an opticai or acoustic aiarm indicates the damage andthe test is to be aborted.
    Figure 2 shows a testing device 1 according to the invention comprising a band ioop2 and a frame 3. The set-up is simiiar to the device shown in Fig. 1 where the bandioop 2 is attached on one end 11 to the frame 3 by a fixing-device 6. in this particuiarembodirnent the frame 3 consists of a front part 14 and a back part 15, which areconnected through two upper bars '7 and a iower bar 8. The iower bar 8 is connectedto the front part 14 and the back part 15 of the frame 3 through boits 12 and is further _12.. connected to a puiiing device 2G. The puiiing device consists of an anchor 21, whichis attached to the ground, the ceiiing, or a wait through anchor boits 23. The puiiingdevice 2G comprises further a moveabie mount 22, which is connected to the towerhar 8. The moveabie mount 22 moves towards and away from the anchor 21 in orderto puii on the band ioop 2, which is connected on one end 11 to the frame 3 and onthe other end to a stationary attachment. By puiiing down the moveahie mount 22radiai pressure is appiied by the iniay 5 to an inserted tubuiar object. i-iowever, this isoniy one embodiment of the current invention and instead of a stationary attachmentthe band ioop 2 a puiiing device is attachabie, in order to appiy further pressure on the tubuiar object inserted in the pressure sieeve 4.
    Figure 3 iiiustrates a further embodiment of the invention, where the pressure sieeve4 is formed by using a strap 31. The band ioop 2 is fed through the strap 31 throughone opening, forms the pressure sieeve 4, and comes back either through the sameor another opening of the strap 31. in this particuiar embodiment, a frame 3 is notnecessary and the band ioop 2 is attached on at ieast one end to a puiiing device 34and on the other end to an anchor 33. The hand ioop 2 can be attached to the fixing35 andior the anchor 33 by ciamping. The pressure sieeve 4 is further equipped withan iniay 5 simiiarto the embodiment shown in Fig. 1 and Fig. 2. The puiiing device 34consists of a fixing 35, where the band ioop 2 can be attached to the puiiing device34. A moveabie mount 36 is used to appiy force to the hand Boop 2 and subseguentiypressure on a tubuiar object through the pressure sieeve 4 and the iniay 5. in thisshown embodiment, the moveahie mount 36 moves up the entire puiiing device 34.Further ernbodirnents inciude drums to force-feed and drurns or cores to wind up the band ioop 2 in order to appiy pressure. å!! _13..
    Reference Numereie end Üeeignetiene Testing deviceBandicopFramePressure eieeveiniay Fixing device Upper ber OONUIW-ÄOJN-Ä Lewerbar 9 Mount 1G Opening 11 End 12 Bolts 13 Mcunting bcit14 Frontpert 15 Beck part 20 Puiiing device21 Anchor 22 Mcunt 23 Anchcrbeit31 Strap 32 Beit 33 Anchcr 34 Puiiing device35 Fixing 33 Evioveabie mount
    权利要求:
    Claims (19)
    [1] 1. Patent Ciaims t. Method for testing tubuiar objects, in particuiar paper cores, wherein the tubuiarobject to be tested is received by a testing device (t), and where - the testing device (t) consists of at ieast a band ioop (2), - the testing device (t) is appiying radiai pressure to the tubuiar object, where theradiai pressure is caused by puiiing the band ioop (2), and - the radiai pressure is increased untii the tested finai pressure is reached er the object is damaged.
    [2] 2. iviethod according to ctaim t,wherein the radiat pressure is appiied eveniy en the curved surface ef the tubuiar object through the band ioep (2).
    [3] 3. iviethod according to eiaim t or 2,wherein a sudden drop in a counteracting force is detected and indicates damage to the tubuiar object.
    [4] 4. Method according to ciaim t, 2 or 3,wherein the inner diameter andior a iength variation of the tubuiar object is rnonitored by sensers.
    [5] 5. Method according to one of the ciaims 1 through 4,Wherein a surface test of the tubutar object, in particuiar a concentricity test and test of the geemetric distortion is performed by the testing device (t).
    [6] 6. A testing device (t) for testing tubuiar objects, in particuiar paper cores, Wherethe object to be tested is received in the testing device (t), and where the testingdevice (t) tt) _15- consists of at ieast a hand ioop (2) which forms a pressure sieeve (4), wherein theinner surface of said pressure sieeve (4) is facing the outer surface of the tuhuiar object during pressure admission.
    [7] 7. Testing device (t) according to ciairn 6, wherein the pressure sieeve (4) is formed hy an open ioop of the band ioop (2), orthat one end of the band ioop (2) is paniaiiy reduced and the other end comprises anopening, where the reduced end is puiied through the opening to form the pressure sieeve (4).
    [8] 8. Testing device (t) according to ciaim o or 7,vvherein the hand ioop (2) comprises on one end or on both ends a puiiing device (20, 34) and/or is on one end attachahie to a frame (3).
    [9] 9. Testing device (1) according to any of the ciaims 6, T or 8cornprising a frame (3), whereat the band ioop (2) is attachahie and comprises fixing devices (6).
    [10] 10. Testing device (t) according to any of the ciaims 6 through Q,vvherein the frame (3) is stationary and one end of the band ioop (2) is attached tothe frame (3).
    [11] 11. Testing device (f) according to any of the ciaims 6 through 1G, vvherein one open end of the band ioop (2) is stationary and the frame (3) is rnobiie.
    [12] 12. Testing device (i) according to any of the ciaims 6 through tt, wherein the puiiing device (29, 34) is attachabie to a free end of the hand ioop (2) orthe frame (3), or that hoth ends of the band ioop (2) are attachabie to a puiiing device(ZÛ, 34) each, it) -1§-
    [13] 13. Testing device (1) according to any of the ciaims 6 through 12,wherein the pressure sieeve (4) comprises an iniay (5) made of piastic, rubber or any simiiar materiai to provide even pressure transfer to the tubuiar objects.
    [14] 14. Testing device (1) according to any of the ciaims 6 through 13,wherein the frame (3), fixing devices (6) and in particuiar the band Boop (2) are made of rnetai.
    [15] 15. Testing device (1) according to any of the ciaims 6 through 14,wherein a sudden drop of the counteracting force is detectabie by sensors in order to determine damages to the tubuiar objects.
    [16] 16. Testing device (1) according to any of the ciairns 6 through 15,wherein the inner diameter of the tubuiar object andfor change in iength is detectabie by Sensors.
    [17] 17. Testing device (1) according to any of the ciaims 6 through 16,vvherein the sensors are monitored, and the measurement vaiues are stored, and the puiiing force is controiied, wherein the stored information is reiayed when required.
    [18] 18. 16. Testing device (1) according to any of the ciaims 6 through 1Y,wherein in case of a drop in the counteracting force opticai andlor acoustic signai generators are activatabie.
    [19] 19. Testing device (1) according to any of the ciaims 6 through 18,wherein sensors in the form of foiis or measurement strips are provided on the surface of the tubuiar object.
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    公开号 | 公开日 | 专利标题
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    同族专利:
    公开号 | 公开日
    SE536994C2|2014-11-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2020-05-05| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1150809A|SE536994C2|2011-09-08|2011-09-08|Method and apparatus for pressure testing of tubular objects|SE1150809A| SE536994C2|2011-09-08|2011-09-08|Method and apparatus for pressure testing of tubular objects|
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