FI92503C

FI92503C - Method and apparatus for felt replacement

Info

Publication number: FI92503C
Application number: FI933817A
Authority: FI
Inventors: Oiva Vallius
Original assignee: Valmet Paper Machinery Inc
Priority date: 1993-09-01
Filing date: 1993-09-01
Publication date: 1994-11-25
Also published as: FI92503B; FI933817A0

Description

9250392503

Menetelmå ja laitteisto huovan vaihdossa Forfarande och anlåggning vid filtbyte 5 Keksinnon kohteena on menetelmå ja laitteisto huovan vaihdossa. Huopa kulkee kellaritilassa olevan huovanjohtotelan kautta suljettuna lenkkinå.The invention relates to a method and an apparatus for changing a felt. The blanket passes through a felt guide roller in the basement in a closed loop.

Paperikoneen huopavienneisså huopa on sovitettu kulkemaan suljettuna lenkkinå paperi-konesalin kellaritilassa olevan huovanjohtotelan kautta. Tekniikan tason ratkaisuissa 10 huovan vaihdoissa mainittu kellaritilan tela nostetaan vinssilaittein ylos. Tåmå tehdåån huovan vaihdon mahdollistamiseksi ja huovan vapauttamiseksi mainitun huovanki-ristystelan yhteydestå. Huovan vaihto tekniikan tason ratkaisussa on siten tapahtunut seuraavasti. Kellaritilassa oleva huovan kiristystela on vapautettu laakeripesistaån ja tåmån jålkeen nostettu vinssilaitteen avulla paperikonesalin lattiatasolle. Mainittu 15 toimenpide mahdollistaa huovan laskostamisen paperikonesalin lattiatason ylåpuolella.In the felt outlets of the paper machine, the felt is adapted to pass in a closed loop through the felt guide roll in the basement of the paper machine room. In the prior art solutions, in the replacement of 10 felts, said basement roll is lifted up by winch devices. This is done to enable the felt to be changed and to release the felt from said felt crossing roller. The replacement of the felt in the prior art solution has thus taken place as follows. The felt tension roller in the basement is released from its bearing seats and then lifted to the floor level of the paper machine room by means of a winch device. Said 15 operation allows the felt to be folded above the floor level of the paper machine room.

Tamån jålkeen huovan sivuttaissiirto poikittaisesti paperikoneen konesuuntaan nåhden on mahdollista, jolloin huopa voidaan johtaa pois telojen yhteydestå konerunkojen vålisten vapaiden tilojen kautta rungon vålipalojen ollessa poistettuja. Edellå mainittu ratkaisu on kaliis, koska paperikone mainitun ratkaisun toteuttamiseksi on varustettava 20 kalliilla nostinlaitteilla. Tåsså hakemuksessa on esitettykin aivan uudentyyppinen ratkaisu kellaritilan kautta kulkevan huovan vaihtamiseksi.Thereafter, the lateral displacement of the felt transverse to the machine direction of the paper machine is possible, whereby the felt can be led away from the rollers through the free spaces between the machine bodies with the body spacers removed. The aforementioned solution is cabbage, because the paper machine must be equipped with 20 expensive lifting devices in order to implement said solution. This application therefore presents a completely new type of solution for changing the felt passing through the basement space.

Esitettynå on menetelmå ja laite, jolla huovanvaihto voi tapahtua ilman kalliita vinssi-laitteita. Keksinnon mukaisesti varustetaan kellaritilan huovanjohtotela johdevålinein, 25 joiden avulla tela siirretåån paperikoneen konesuuntaan nåhden poikittaisesti. Siten muodostetaan riittåvå vapaa tila, jonka kautta huopa voidaan nostaa ylospåin ja pois huovanjohtotelan ympåriltå. Keksinnon mukaisessa menetelmåsså vapautetaan tela ensin laakeripesistaån ja asetetaan huovan kiristysvålineiden avulla johteiden varassa kuljetettavaan kelkkaan. Tamån jålkeen suoritetaan telan siirto kelkan varassa poikittai-30 sesti vapaan tilan muodostamiseksi ja huovan ohjaamiseksi pois telan ympåriltå. Koska tela on erittåin painava komponentti, muodostuu liikevastuksesta suuri. Telan poikittais-siirron mahdollistamiseksi on ylempi poikittaisjohde varustettu bombeerausvålinein, jolla 2 92503 voidaan mykevoittåå johde siten, ettå tela siirtyy kelkkoineen poikittaisesti painovoimaa hyvåksikåyttåen. Telan siirto takaisin alkuperåiseen asemaansa tapahtuu bombeeraamal-la johde vastakkaiseen suuntaan eli johteen keskialueelta alaspåin.Presented is a method and apparatus with which felt change can take place without expensive winch equipment. According to the invention, the basement felt roll guide roll is provided with guide means 25 by means of which the roll is moved transversely to the machine direction of the paper machine. Thus, sufficient free space is created through which the blanket can be lifted up and away from around the felt guide roll. In the method according to the invention, the roll is first released from its bearing housings and placed on a carriage to be transported on guides by means of tensioning means for the felt. Thereafter, the roll is moved on the carriage transversely to create a free space and to direct the felt away from around the roll. Because the roll is a very heavy component, the resistance to movement is high. In order to enable the transverse movement of the roll, the upper transverse guide is provided with bombarding means, by means of which 2 92503 the guide can be silenced so that the roll moves transversely with its carriages using gravity. The transfer of the roll back to its original position takes place by bombarding the guide in the opposite direction, i.e. from the center of the guide downwards.

5 Keksinnon mukaiselle menetelmålle on pååasiallisesti tunnusomaista, etta huovan vapauttamiseksi huovanjohtotelan ympåriltå asetetaan huovanjohtotela huovanjohtotelan yhteyteen saatettuun kelkkaan ja siirretåån tåmån jålkeen kelkkaa johteissa paperiko-neen konesuuntaan nåhden sivuttaisesti, jolloin telan sivuttaissiirrolla aikaansaadun vapaan tilan kautta on huopasilmukka vapautettavissa telan ympårilta.The method according to the invention is mainly characterized in that in order to release the felt from around the felt guide roll, the felt guide roller is placed on a carriage connected to the felt guide roll and then

1010

Keksinnon mukaiselle laitteistolle on pååasiallisesti tunnusomaista, ettå huovan vapauttamiseksi telan ympåriltå kåsittåå laiteratkaisu telan yhteydesså johderakenteen ja siihen kytkeytyvån kelkan, jolloin tela on asetettavissa kelkan varaan, jolloin vapaata tilaa muodostettaessa huovan johtamiseksi pois telan ympåriltå siirretåån kelkkaa 15 johteissa paperikoneen konesuuntaan nåhden poikittaisesti.The apparatus according to the invention is mainly characterized in that the device solution for releasing the felt around the roll comprises a guide structure and an associated carriage in connection with the roll, whereby the roll can be placed on the carriage.

Keksintoå selostetaan seuraavassa viittaamalla oheisien piirustuksien kuvioissa esitettyi-hin keksinnon eråisiin edullisiin suoritusmuotoihin, joihin keksintoå ei ole tarkoitus kuitenkaan yksinomaan rajoittaa.The invention will now be described with reference to some preferred embodiments of the invention shown in the figures of the accompanying drawings, to which, however, the invention is not intended to be exclusively limited.

2020

Kuviossa 1 on esitetty tekniikan tason mukainen huovanvaihtojåijestely paperikoneen yhteydesså.Figure 1 shows a prior art felt change arrangement in connection with a paper machine.

Kuviossa 2A on esitetty tåmån hakemuksen mukainen menetelmå ja laiteratkaisu 25 paperikoneen kellaritilassa. Katkoviivoin on esitetty telan asennoiminen sivusiirtokelkan yhteyteen laakerista vapauttamisensa jålkeen.Figure 2A shows a method and apparatus solution according to the present application in the basement of a paper machine. The dashed lines show the positioning of the roll in connection with the side transfer carriage after its release from the bearing.

Kuviossa 2B on esitetty leikkaus I-I kuviosta 2A. Tela on alkuasemassaan.Figure 2B is a section I-I of Figure 2A. The roller is in its starting position.

30 Kuviossa 2C on esitetty tela sivulle siirretysså asemassa.Figure 2C shows the roll in the offset position.

Él 3 92503Edge 3 92503

Kuviossa 2D on esitetty johderakenne osittaisleikkauskuvantona ja aksonometrisesti.Figure 2D shows the conductor structure in a partial sectional view and axonometrically.

Kuviossa 3A on esitetty johteen bombeeraus telaa sivuttaisesti siirrettaessa. Esitys on havainnollinen ja periaatteellinen.Figure 3A shows the bombardment of the guide when the roll is moved laterally. The presentation is illustrative and principled.

55

Kuviossa 3B on esitetty telan palautus alkuperåiseen asemaansa johdetta vastakkaiseen suuntaan bombeeraamalla.Figure 3B shows the return of the roll to its original position by bombarding the guide in the opposite direction.

Kuviossa 1 on esitetty tekniikan tason ratkaisu. Vinssilaitteen erillisen sahkomoottorin 10 M avulla nostetaan raskas tela T ylåpuoliseen asemaan B paperikonesalin lattiatason P tuntumaan.Figure 1 shows a prior art solution. With the aid of a separate electric motor 10 M of the winch device, the heavy roll T is lifted to the upper position B near the floor level P of the paper machine room.

Kuviossa 2A on esitetty keksinnon mukainen ratkaisu konesuuntaan nåhden sivultapåin katsottuna. Esitettynå on pelkåstaan kellaritila. Tela T sijaitsee huovan H kiristyslait- 15 teen 10 laakerivålineissa 11. Huopaa H kiristetaan sinånså tunnetulla huovan kiristys- laitteella 10 liikuttamalla laakerivålineita 11 viistosti alaspåin suuntautuvissa kiristys- laitteen 10 johteissa J. Huovan kiristyslaitteen 10 avulla tela T lasketaan kelkan 12 kehtoon 16. Kelkka 12 kasittaa pystypalkin 13 ja vaakasuuntaisen kehdon 16, joka kasittaa kaarevan pinnan 16a, jonka varaan tela T on vaipastaan laskettavissa. Tata 20 ennen on kuitenkin laakerivålineet 11 avattu. Huopa H on vielå tassa vaiheessa telan T ympårillå. Pystypalkki 13 kasittaa rullan 14 tai vastaavan, joka kasittaa edullisesti lohenpyrstoprofiilin, joka tulee vaakasuuntaisen johteen, edullisesti kiskon 17a vastaavan muotoista johdeprofiilia vasten. Pystypalkki 13 kasittaa lisaksi toisen alempana sijaitsevan rullan 15, joka painautuu toista johdetta 17b vasten. Johde 17a sijaitsee 25 johderakenteen 17 ylåpuolisessa vaakapalkissa 21. Johde 17b sijaitsee johderakenteen 17 . toisessa vaakasuuntaisessa, mutta alapuolisessa johdepalkissa 22. Johde 17b on profiilil- « taan suora tasomainen johdepinta.Figure 2A shows a solution according to the invention seen from the side in the machine direction. Shown is basement space only. The roller T is located in the bearing means 11 of the felt tensioning device 10 10. The felt H is tightened by a felt tensioning device 10 known per se by moving the bearing means 11 obliquely downwards in the guides J of the tensioning device 10. By means of the felt tensioning device 10 the roll T is lowered into the carriage 12 a vertical beam 13 and a horizontal cradle 16 covering a curved surface 16a on which the roll T can be lowered from its casing. Prior to this, however, the bearing means 11 have been opened. The felt H is still around the roll T at this stage. The vertical beam 13 abuts a roller 14 or the like, which preferably abuts a dovetail profile which comes against a horizontal guide, preferably a correspondingly shaped guide profile of the rail 17a. In addition, the vertical beam 13 casts a second lower roller 15 which presses against the second guide 17b. The guide 17a is located in the horizontal beam 21 above the guide structure 17. The guide 17b is located in the guide structure 17. in a second horizontal but lower guide beam 22. The guide 17b is a straight planar guide surface with a profile.

Kuviossa 2A esitetysti kasittaa laiteratkaisu edelleen toimilaitteen 18, edullisesti 30 kasikåyttoisen toimilaitteen, edullisesti ruuvilaitteen. Ruuviin 19 kytkeytyy våkipyorå 20, jota pyorittamållå ruuvi 19 nousee ja laskee runko-osaansa 19b kierteessa. Runko- » 4 92503 osa 19b on kytketty kiinni alapuoliseen vaakapalkkiin 22 sekå ruuviosastaan 19 ylåpuo-liseen vaakapalkkiin 21. Våkipyoråå 20 pyorittåmållå liikutetaan siten ruuvia 19 kuviossa esitetysti suuntiin Lj tai L^. Suuntaan Lt ruuvia 19 liikutettaessa nostetaan ja siten bombeerataan ylåpuolista vaakapalkkia 21 ja sen kautta edelleen ylåpuolista 5 johdetta 17a. Johteen 17a muodostuessa siten viistoksi vaakatasoon nåhden helpotetaan kelkan 12 sivuttaissiirtoa vapaata tilaa E muodostettaessa huovan H johtamiseksi pois telan T ympåriltå.As shown in Figure 2A, the device solution further encloses the actuator 18, preferably the 30-actuator, preferably the screw actuator. A screw 20 is connected to the screw 19, which, when rotated, raises and lowers the screw 19 into its body part 19b in a thread. The body part 19b is connected to the lower horizontal beam 22 as well as to the horizontal beam 21 above the screw part 19. By rotating the intermediate wheel 20, the screw 19 is thus moved in the directions Lj or L ^ as shown in the figure. When the screw 19 is moved in the direction Lt, the upper horizontal beam 21 is raised and thus the upper guide 5a is further bombarded. As the guide 17a is thus formed obliquely to the horizontal, the lateral displacement of the carriage 12 is facilitated in forming a free space E for guiding the felt H away from around the roll T.

Kuviossa 2B on esitetty leikkaus I-I kuviosta 2A. Kuviossa esitetysti nostetaan vaaka-10 palkkia 21 toimilaitteen 18 kohdalta ylospåin suuntaan Lj. Tålloin johde 17a nousee ylospåin. Tela T sijaitsee kehdossa 16. Johteen 17a asettuessa vaakatasoon nåhden viistoon asentoon siirtyy tela T painovoimaisesti sivulle pain pitkin alaspåin viettåvåå johderataa. Vapaa tila E muodostuu telan toisen påådyn N ja paperikoneen keskilinjan C våliselle alueelle. Mainitun vapaan tilan E kautta voidaan huopa H nostaa pois telan 15 T ollessa siirretty sivulle ja huopasilmukan ollessa siten vapautettavissa pois telan T ympårilta. Telan T pituutta on merkitty kiijaimella D.Figure 2B is a section I-I of Figure 2A. As shown in the figure, the horizontal bar 10 is lifted upwards from the actuator 18 in the direction Lj. At this time, the conductor 17a rises. The roll T is located in the cradle 16. When the guide 17a is placed in an oblique position with respect to the horizontal, the roll T is gravitationally moved to the side along the guide path leading downwards. The free space E is formed in the area between the other end N of the roll and the center line C of the paper machine. Through said free space E, the felt H can be lifted off when the roll 15 T has been moved to the side and the felt loop can thus be released away from around the roll T. The length of the roll T is marked with a rack D.

Kuviossa 2C on esitetty kelkan 16 ja telan T asento, jossa vapaa tila E on muodostettu. Vapaatila E on muodostettu telan T paådyn N ja kellaritilan betonirakenteiden R vålille.Figure 2C shows the position of the carriage 16 and the roll T in which the free space E is formed. The free space E is formed between the end N of the roll T and the concrete structures R of the basement space.

2020

Kuviossa 2D on esitetty aksonometrisesti ja osittaiskuvantona johderakenne 17, johon kelkka 12 rullistaan 14,15 toiminnallisesti kytkeytyy. Kuviossa esitetysti kannatin K olien L-profiili, on liitetty esim. hitsaamalla levyrakenteeseen, joka on esimerkiksi pultein liitetty betonirunkoon R. Kannattimen K ulkonemapalkin K’ ylåpintaan on liitetty 25 palkki 21, joka kåsittåå ylåpuolisen johteen 17a ja mainitun ulkonemapalkin alapintaan K’ on liitetty palkki 20, joka kåsittaå sivupinnallaan johteen 17b. Kuviossa esitetysti palkkien 20 ja 21 vålille on liitetty toimilaite 18, joka kåsittaå edullisesti våkipyoråstå 20 pyoritettåvån ruuvin 19, joka on sovitettu kiertymåån rungon 19b ruuvikierteesså. Ruuvia 20 pyorittåmållå liikutetaan sitå suuntaan Lj tai L^. Toimilaite 18 sijaitsee 30 mahdollisimman kaukana kannattimesta K, jotta mahdollistetaan mahdollisimman pienellå voimatarpeella palkin 21 ja siinå olevan johteen 17a bombeeraus.Figure 2D shows an axonometric and partial view of a conductor structure 17 to which the carriage 12 from its rollers 14,15 is operatively connected. As shown in the figure, the L-profile of the bracket K is connected, e.g. by welding, to a slab structure connected, for example, by bolts to a concrete frame R. A beam 21 is connected to the upper surface of the protruding beam K 'of the bracket K, comprising an upper guide 17a and a lower surface K' 20, which comprises a guide 17b on its side surface. As shown in the figure, an actuator 18 is connected between the beams 20 and 21, which preferably comprises a screw 19 rotated from the main wheel 20, which is arranged to rotate in the screw thread of the body 19b. By turning the screw 20, it is moved in the direction Lj or L ^. The actuator 18 is located as far as possible from the support K in order to allow the beam 21 and the guide 17a therein to be bombarded with the least possible force.

IIII

5 925035 92503

Kuviossa 3A on esitetty periaatteellisena esityksenå telan T sivuttaissiirto. Voima F kohdistetaan toimilaitteen 18 kautta palkkiin 21 ja nostetaan siten johdetta 17a. Tålloin mahdollistuu kelkan 12 ja siinå olevan telan T sivuttaissiirto telan T painovoimaa hyvåksikåyttåen. Kuviossa on nuolella Sj esitetty telan T sivuttaissiirtoa vapaan tilan 5 E muodostamiseksi.Fig. 3A shows in principle the lateral displacement of the roll T. The force F is applied through the actuator 18 to the beam 21 and thus the guide 17a is lifted. In this case, it is possible to move the carriage 12 and the roll T therein laterally, using the gravity of the roll T. In the figure, the arrow Sj shows the lateral displacement of the roll T to form a free space 5E.

Kuviossa 3B vaikutetaan toimilaitteella 18 vastakkaiseen suuntaan voimalla F kun kuvion 3A toimivaiheessa. Tålloin tela T siirretaan kelkan K varassa takaisin alkuperåiseen asemaansa. Kuviossa on nuolella S2 esitetty telan T siirto takaisin alkuperåiseen 10 asemaansa laakerivålineittenså yhteyteen.In Fig. 3B, the actuator 18 acts in the opposite direction by a force F when in the operating phase of Fig. 3A. In this case, the roll T is moved back to its original position on the carriage K. The figure shows the transfer of the roll T back to its original position 10 in connection with its bearing means by the arrow S2.

Claims

92503

A method for changing a felt, which blanket is adapted to pass in the paper machine room through a felt guide roll (T) in its basement in a closed loop, characterized in that to release the felt from the felt guide roll (T), a felt guide roll is placed in a coil 12 connected to the felt guide roll. and then moving the carriage (12) in the guides (17a, 17b) laterally with respect to the machine direction (F) of the paper machine, whereby through the free space (E) provided by the lateral displacement of the roll, the felt loop (H) can be released from the roll (T). 10

A method according to claim 1, characterized in that in the method the roll (T) is moved on the carriage (12) by means of a felt tensioning device (10) and that the roll (T) is released from its bearings before the roll (T) is laterally moved.

Method according to Claim 1 or 2, characterized in that the guide (17a) of the guide structure (17) is formed obliquely to the horizontal in order to facilitate lateral displacement of the roll, using the weight of the roll (T) to facilitate lateral displacement.

A method according to the preceding claim, characterized in that the guide surface (17b) is raised upwards before the lateral displacement of the roll, whereby the guide (17a) is formed to be guided downwards and that when the roll is returned to its original position the guide (17) is reverse bombardment, whereby the weight of the roll can be used to move the roll back to its original position in connection with its bearings. 5. Apparatus for changing a felt, which blanket (H) is adapted to pass in a closed loop in the paper machine room through a felt guide roll (T) in the basement of the paper machine room, comprises 11 devices for releasing the felt around the roll (T) in connection with the roll (T) a guide structure (17) and an associated carriage (12), the roll being positionable on the carriage (12), the free space (E) being formed to move the carriage (12) around the roll (T) to move the carriage (12) in the guides (17a, 17b) transverse to the machine direction (F).

Apparatus according to the preceding claim, characterized in that the carriage 5 (12) comprises a cradle (16) and a curved surface (16a) thereon on which the roll (T) can be lowered from its casing and that the carriage (12) abuts the guide structure (17) rollers (14, 15) or the like operatively connected to the guides (17a, 17b) and adapted to run along the guides (17a, 17b).

Apparatus according to the preceding claim, characterized in that the device solution provides an actuator (18) with which the guide (17a) can be brought obliquely to the horizontal.

Apparatus according to the preceding claim, characterized in that the actuator (18) is arranged between the horizontal beams (22, 21) and that a guide (17a) is arranged on the upper surface of the upper horizontal beam (21), the actuator (18) having the horizontal beam (21) and the guide (17a) therein can be set obliquely to the horizontal, whereby the roller (T) is moved sideways by means of the actuator (18) upwards of the horizontal beam (21) and raises the guide (17a) at the actuator (18) The transfer of the roll (T) to its original position is acted upon by the actuator (18) in the opposite direction to the horizontal beam (21) and the guide (17a) is inclined in the opposite direction to the free space (E) forming step.

Apparatus according to the preceding claim, characterized in that the actuator (18) is a screw (19) or the like which is raised and lowered by threading from the main wheel (20) in the thread of its body part (19b).

Apparatus according to one of the preceding claims 5 to 9, characterized in that the actuator (18) is adapted to be located when the roll (T) is in use in the center of the roll with respect to the roll 30. • «92503