EP0824384A1 - Vorrichtung zum aufweiten eines rohres - Google Patents
Vorrichtung zum aufweiten eines rohresInfo
- Publication number
- EP0824384A1 EP0824384A1 EP96914055A EP96914055A EP0824384A1 EP 0824384 A1 EP0824384 A1 EP 0824384A1 EP 96914055 A EP96914055 A EP 96914055A EP 96914055 A EP96914055 A EP 96914055A EP 0824384 A1 EP0824384 A1 EP 0824384A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- probe
- expanding
- segments
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
- B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
Definitions
- the invention relates to a device for expanding a tube.
- EP 0 468 076 A1 discloses a device for expanding a tube, which contains a probe which can be inserted into the tube and has a radially expandable expansion sleeve made of an elastically deformable material.
- the ends of the expanding sleeve are each supported on a shoulder of a receiving sleeve.
- These receiving sleeves are connected to each other by a pull rod and axially fixed in opposite directions.
- the pull rod is passed through the expansion sleeve and, with recesses in the receiving sleeves, forms annular recesses which each receive one end of the expansion sleeve.
- the expansion sleeve is pressurized with a pressure medium on a partial area of its inner surface via bores in the pull rod.
- the expanding sleeve is provided on the outer circumference in the region of the end face of the receiving sleeves surrounding it in a ring shape with an annular circumferential groove for receiving an O-ring.
- These O-rings are intended to protect the expansion sleeve from damage if it is squeezed into the cavities between the receiving sleeves and the pipe to be expanded when pressure is applied.
- the O-ring used in the known embodiment must have sufficient elastic properties in order to spring back into its original shape after the pressure has been applied. On the other hand, it must also have sufficient mechanical strength to absorb the axial forces acting on it when pressure is applied.
- O-rings made of a material that is elastically deformable within the deformation path until it rests against the inner wall of the tube for example O-rings made of a polymeric material, cannot absorb these high axial forces, so that the expansion sleeve becomes in use such O-rings are squeezed into the annular space between the tube and the receiving sleeve and can thereby be irreversibly deformed. This not only results in damage to the expansion sleeve, but moreover causes recovery of the probe after expansion has been made more difficult.
- EP 0 314 267 A2 proposes to use two metallic support rings consisting of a plurality of segments which can be displaced relative to one another, each of which is held together by an elastic O-ring and is arranged next to one another. These segments can slide against each other on their mutually facing end faces, so that one of the support rings rests against the tube when the expansion sleeve is expanded and the other support ring lies against a shoulder serving as a limitation.
- the two support rings which are arranged next to one another and partially overlap one another in the axial plan view, largely prevent the expansion sleeve from being squeezed in the axial direction into the space between the tube and the expansion device or between the segments.
- the invention is based on the object of specifying a device for expanding a tube which reversibly assumes its original shape as far as possible after expansion, so that recovery of the device after the expansion process is easily possible, and which is also simple in construction .
- the device for expanding a tube comprises a probe which can be inserted into the tube and which contains an elastic expansion sleeve which can be pressurized with a pressure medium at least on a partial area of its inner surface.
- the expansion sleeve is provided on its outer circumference with a support ring which is supported on a shoulder of the probe surrounding the expansion sleeve and is formed from at least two partial segments which are movable relative to one another and overlap at their mutually facing ends .
- This measure ensures that the support ring can reversibly follow the change in diameter that occurs when the expanding sleeve is expanded, so that the expanding sleeve is not squeezed into a gap between the tube and the probe. Since the overlapping sub-segments interlock, the formation of interspaces between the sub-segments is also prevented during their radially outward displacement. In this way, the expansion sleeve cannot squeeze between the partial segments.
- the partial segments preferably have a groove on their outer circumference for receiving an elastic O-ring.
- This measure ensures that the sub-segments are reset to the original radius after the expansion, ie after the pressure on the expansion sleeve has been released.
- at least one subsegment at its end on the groove base has an extension which can be inserted into a corresponding recess on the inner circumference of the adjoining subsegment.
- at least one sub-segment is provided, which at its end has an extension on each side of the groove, which can be inserted into recesses in the side wall of the adjacent sub-segment.
- FIG. 1 shows a device according to the invention is illustrated schematically in a longitudinal section.
- 2 shows a particularly preferred embodiment of a
- this support ring is shown from opposite directions in each case in a side view in a plane oriented perpendicular to the sectional area of FIG.
- a device for expanding a tube contains a probe 2 which has an expanding sleeve 4 made of a material with high elastic deformability, preferably an elastomer with a hardness between 90 Shore and 100 Shore, for example Fibroflex (trademark of Fibro).
- the expansible sleeve 4 is supported with its ends 6a and 6b in a connection-side receiving sleeve 8a and an end-side receiving sleeve 8b, respectively.
- a pull rod 10 is screwed into the receiving sleeve 8a, via which the receiving sleeve 8b and the expanding sleeve 4 are pushed. At its free end facing away from the receiving sleeve 8a de the pull rod 10 is fixed in a head part 12 which is provided with a shoulder 14 on which the front receiving sleeve 8b is supported.
- connection-side receiving sleeve 8a is fixed to a guide tube 16 and provided with a connection 18 for a pressure medium, which is supplied to the cavity 22 inside the receiving sleeve 8a via a high-pressure hose 20.
- the pull rod 10 is provided with a central bore 24, into which channels 26 lead in the area of the expansion sleeve 4 to the outer surface of the pull rod 10.
- the receiving sleeves 8a and 8b are provided with annular recesses which, together with the pull rod 10, each form a cylindrical annular space 30a or 30b.
- the widening sleeve 4 is inserted into this annular space 30a or 30b with its ends 6a and 6b and is supported axially with its end faces 28a and 28b on the base of this annular space 30a or 30b.
- the expansion sleeve 4 comprises a central region 42 with an approximately constant small wall thickness, to which a region 44a or 44b with increasing wall thickness and outer diameter adjoins.
- the regions 44a and 44b are each followed by the end 6a or 6b opening into the recess 30a or 30b with an approximately constant outer diameter.
- the outer sleeve 4 is provided on its outer circumference with an annular groove 46a or 46b, in each of which a support ring 50 is inserted.
- the support ring 50 is composed of two or more sub-segments (FIGS. 2 to 4) which are movable relative to one another.
- the edge of the grooves 46a and 46b facing the receiving sleeves 8a and 8b is arranged flush with the end face of the receiving sleeves 8a and 8b, so that the support ring 50 with its respective receiving sleeves 8a and 8b facing side surface rests on a shoulder 51a or 51b which is formed by the end face of the receiving sleeves 8a or 8b.
- the support ring 50 is also provided with an annular groove 52 which contains an O-ring 54 for fixing the support ring 50 in the groove 46a and 46b.
- This O-ring 54 serves as a spring element which does not hinder a displacement of the sub-segments of the support ring 50 when pressurized and causes the sub-segments to return to their original position after the pressure has been removed.
- Venting bores 60a and 60b at the base of the recesses 30a and 30b of the receiving sleeves 8a and 8b enable the expansion sleeve 4 to be inserted without play.
- a sealing ring 61 placed in an inner groove of the receiving sleeve 10a prevents the pressure medium from escaping into the region lying between the expanding sleeve 4 and the receiving sleeve 10a.
- the area under pressure between the pull rod 10 and the expansion sleeve 4 is limited by sealing rings 62 inserted into the internal grooves of the expansion sleeve 4.
- the central bore 24 of the tension rod 10 is closed with a threaded pin 64 designed as a sealing cone.
- the support ring 50 is composed of two semi-ring-shaped partial segments 80 which overlap and engage in one another at their mutually facing ends 82 and 84.
- the partial segments 80 are movable with respect to one another and can be displaced relative to one another in the circumferential direction.
- each partial segment 80 is provided at one end 82 with a recess 86 arranged on the inner circumference, into which an extension 88 arranged on the groove base engages when the two partial segments 80 are joined together.
- the relatively thin-walled design of the extension 88 ensures largely gap-free sliding along the recess 86.
- the side walls 90 of the groove 52 at one end 82 are also provided with an extension 92 which engage in a corresponding recess 94 at the opposite end 84 of the other sub-segment 80.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measuring Leads Or Probes (AREA)
- Endoscopes (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19517379 | 1995-05-11 | ||
DE19517379 | 1995-05-11 | ||
PCT/DE1996/000799 WO1996035527A1 (de) | 1995-05-11 | 1996-05-09 | Vorrichtung zum aufweiten eines rohres |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0824384A1 true EP0824384A1 (de) | 1998-02-25 |
EP0824384B1 EP0824384B1 (de) | 1999-08-04 |
Family
ID=7761704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96914055A Expired - Lifetime EP0824384B1 (de) | 1995-05-11 | 1996-05-09 | Vorrichtung zum aufweiten eines rohres |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0824384B1 (de) |
JP (1) | JPH11504863A (de) |
KR (1) | KR19990008467A (de) |
CA (1) | CA2220513A1 (de) |
DE (1) | DE59602632D1 (de) |
ES (1) | ES2136404T3 (de) |
WO (1) | WO1996035527A1 (de) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4724693A (en) * | 1985-12-20 | 1988-02-16 | Combustion Engineering, Inc. | Tube expansion tool |
US4791796A (en) * | 1987-10-28 | 1988-12-20 | Cameron Iron Works Usa, Inc. | Tool for cold forging tubular members |
EP0468076A1 (de) * | 1990-07-26 | 1992-01-29 | Siemens Aktiengesellschaft | Vorrichtung zum Aufweiten eines Rohres |
-
1996
- 1996-05-09 WO PCT/DE1996/000799 patent/WO1996035527A1/de not_active Application Discontinuation
- 1996-05-09 KR KR1019970707997A patent/KR19990008467A/ko not_active Application Discontinuation
- 1996-05-09 ES ES96914055T patent/ES2136404T3/es not_active Expired - Lifetime
- 1996-05-09 DE DE59602632T patent/DE59602632D1/de not_active Expired - Fee Related
- 1996-05-09 JP JP8533664A patent/JPH11504863A/ja not_active Ceased
- 1996-05-09 EP EP96914055A patent/EP0824384B1/de not_active Expired - Lifetime
- 1996-05-09 CA CA002220513A patent/CA2220513A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9635527A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2136404T3 (es) | 1999-11-16 |
JPH11504863A (ja) | 1999-05-11 |
CA2220513A1 (en) | 1996-11-14 |
EP0824384B1 (de) | 1999-08-04 |
KR19990008467A (ko) | 1999-01-25 |
WO1996035527A1 (de) | 1996-11-14 |
DE59602632D1 (de) | 1999-09-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3525813C2 (de) | ||
DE69006135T2 (de) | Einsatzrohr für die Reparatur von Rohrleitungen. | |
DE69620211T2 (de) | Vorrichtung zur erfassung von leckagen in rohrflanschverbindungen | |
DE3875118T2 (de) | Verbindungsmechanismus fuer duennwandige rostfreie stahlroehren und verbindungsstueck. | |
DE102016007871A1 (de) | Selbstsichernde Bolzenhaltevorrichtung | |
DE102006029566A1 (de) | Verriegelungsmechanismus zur Verwendung bei einer fluiddruckbetätigten Vorrichtung | |
DE9110998U1 (de) | Rohrverbindung | |
CH636677A5 (de) | Aufweitbarer dorn. | |
DE3002715C2 (de) | Dichtungsanordnung | |
DE3931014A1 (de) | Brems- oder/und klemmeinrichtung | |
DE1290397B (de) | Steuerschieber | |
DE3532499C1 (de) | Vorrichtung zum hydraulischen Aufweiten von Rohrabschnitten | |
EP0824384A1 (de) | Vorrichtung zum aufweiten eines rohres | |
DE3604454C1 (de) | Druckaufbaudorn zum druckdichten Befestigen eines Rohres in einer OEffnung eines Rohrbodens | |
DE69407556T2 (de) | Vorrichtung zur befestigung eines elementes an einem bauteil mit einem flüssigkeitskanal | |
DE2838235C2 (de) | Verfahren zum axialen Vorspannen eines homokinetischen Gelenks | |
DE3925293C2 (de) | ||
DE4203853A1 (de) | Positioniervorrichtung fuer zwei zu fuegende bauteile | |
DE3214589C2 (de) | ||
DE10022085C1 (de) | Schnellkupplung zum Verbinden von Medienleitungen | |
DE3401837C2 (de) | ||
WO1996025255A1 (de) | Spreizwerkzeug für kaltverformungen | |
DE2462186C2 (de) | Vorrichtung zum Formen einer Ringnut am Innenumfang einer Verbindungsmuffe eines Rohres aus einem thermoelastisch verformbaren Kunststoff | |
EP1682807B1 (de) | Schnellkupplung | |
DE4035302C2 (de) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19971105 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE CH DE ES FR LI NL SE |
|
17Q | First examination report despatched |
Effective date: 19980217 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE CH DE ES FR LI NL SE |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: SIEMENS SCHWEIZ AG Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 59602632 Country of ref document: DE Date of ref document: 19990909 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2136404 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PUE Owner name: SIEMENS AKTIENGESELLSCHAFT TRANSFER- FRAMATOME ANP |
|
NLS | Nl: assignments of ep-patents |
Owner name: FRAMATOME ANP GMBH |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20020517 Year of fee payment: 7 Ref country code: FR Payment date: 20020517 Year of fee payment: 7 Ref country code: ES Payment date: 20020517 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20020524 Year of fee payment: 7 Ref country code: CH Payment date: 20020524 Year of fee payment: 7 Ref country code: BE Payment date: 20020524 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20020719 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030510 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030510 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030531 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030531 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030531 |
|
BERE | Be: lapsed |
Owner name: *FRAMATOME ANP G.M.B.H. Effective date: 20030531 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031201 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031202 |
|
EUG | Se: european patent has lapsed | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040130 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20031201 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20030510 |