EP2298940B1 - Autofrettagevorrichtung für Hochdruckbauteile, insbesondere für Rohrleitungen - Google Patents

Autofrettagevorrichtung für Hochdruckbauteile, insbesondere für Rohrleitungen Download PDF

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Publication number
EP2298940B1
EP2298940B1 EP09010857A EP09010857A EP2298940B1 EP 2298940 B1 EP2298940 B1 EP 2298940B1 EP 09010857 A EP09010857 A EP 09010857A EP 09010857 A EP09010857 A EP 09010857A EP 2298940 B1 EP2298940 B1 EP 2298940B1
Authority
EP
European Patent Office
Prior art keywords
pressure
valve
component
autofrettage
shut
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.)
Not-in-force
Application number
EP09010857A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2298940A1 (de
Inventor
Armin Merkle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Felss Burger GmbH
Original Assignee
Felss Burger GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Felss Burger GmbH filed Critical Felss Burger GmbH
Priority to EP09010857A priority Critical patent/EP2298940B1/de
Priority to PL09010857T priority patent/PL2298940T3/pl
Publication of EP2298940A1 publication Critical patent/EP2298940A1/de
Application granted granted Critical
Publication of EP2298940B1 publication Critical patent/EP2298940B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
    • C21D7/12—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies

Definitions

  • the present invention relates to a device for applying high-pressure components, in particular pipelines, with an autofrettage pressure, comprising: a high-pressure generating unit for pressurizing the high-pressure component with the autofrettage pressure assigned to a first end of the high-pressure component to be acted upon, and a high-pressure valve unit associated with a second end of the high-pressure component Shut-off body for closing a valve seat to separate a flushing passage formed at the high-pressure valve unit in the application of the autofrettage pressure from the high-pressure component when the high-pressure component is acted upon, and a pressure detection unit for detecting the autofrettage pressure.
  • the autofrettage device 1 has a high-pressure generating unit 2 which, with an adapter nozzle 4, adopts a first end 3a of a high-pressure component to be acted upon in the form of a diesel injection line 5 .
  • a second, opposite end 3b of the diesel injection line 5 is adapted by an adapter nozzle 6 of a high-pressure valve unit 7 .
  • the two pipe ends 3a, 3b provided with a flare are provided with a union nut 9a, 9b and are pressed against a respective counter-holder 10a, 10b during the adaptation.
  • an essentially cylindrical main body 11 of the high-pressure generating unit 2 is supplied with oil as autofrettage fluid via a transverse bore 12 , which passes into the interior of the diesel injection line 5 and from there into a high-pressure region 13 which is located in a valve main body 14 (valve block ) of the high-pressure valve unit 7 is formed.
  • a valve ball 15 is provided as a shut-off body, which rests against a high-pressure region 13 formed on the valve main body 14 in the closed valve state and separates the high-pressure region 13 from a flushing bore 16 provided in the valve block 14.
  • the autofrettage pressure in the diesel injection line 5 can be generated with a closed flushing bore 16.
  • a pressure sensing unit 19 (high-pressure sensor) communicating with the high-pressure area 13 via a measuring bore 18 extending in the transverse direction serves to detect the autofrettage pressure in order to be able to perform pressure regulation or pressure monitoring.
  • the pressure applied by the high-pressure piston 17 is reduced and the connection to the flushing bore 16 is released by raising the valve ball 15 attached to an opener pin 20 by means of a pneumatic cylinder 21 .
  • the ⁇ ffnerstatt 20 with the pneumatic cylinder 21 is here as well as the valve block 14 is provided on a piston rod 22 of a hydraulic cylinder 23 , which serves for pressing the Adaptierdüse 6 against the anvil 10b.
  • the high-pressure generating unit 2 can, via the transverse bore 12, apply a flushing fluid, e.g. Air, are supplied to dissipate the remaining oil in the device 1 via the flushing bore 16 on the high-pressure valve unit 7.
  • a flushing fluid e.g. Air
  • valve block 14 may not withstand the autofrettage pressure permanently. After a longer period of operation, the valve block 14 may burst from the inside, starting at the point at which the measuring bore 18 opens into the high-pressure region 13. Even attempts to achieve a sufficient reduction of the material stresses by optimizing the geometry at the bore branch were unsuccessful.
  • a high-pressure channel for connection of the pressure detection unit is formed with the high-pressure component to be acted upon.
  • the high-pressure valve unit has an adapter nozzle for connection to the second end of the high-pressure component, which forms the valve seat for the shut-off body at its end facing away from the high-pressure component.
  • the valve seat can in this case be designed, in particular, as a conical seat on which a shut-off body, e.g. comes in the form of a pin or needle-shaped high-pressure tube or nozzle when closing the flushing channel to the plant.
  • the high-pressure sensor is hereby typically arranged in the axial extension of the adapter nozzle.
  • the Adaptierdüse is slidably mounted in a valve body or valve block of the high-pressure valve unit against a spring force.
  • the Adaptierdüse is axially movable, wherein the valve seat between the adapter nozzle and shut-off during rinsing, in which the adapter nozzle is pressed against the end of the high-pressure component, is held open by the spring force, so that the flushing passage with the high-pressure component remains connected.
  • the dynamic pressure occurring when flushing the high-pressure component with the Autofrettagemedium at the flushing hole presses the Adaptierdüse in addition to the spring force in the direction of the second end of the high-pressure component, thereby increasing the sealing effect.
  • valve body of the high-pressure valve unit is mounted on a piston rod of a path-controlled hydraulic cylinder.
  • the valve body is in this case provided on the high-pressure component end facing the typically hollow-bore piston rod.
  • the hollow-bored piston rod can serve to receive or guide a high-pressure tube, which is screwed into the valve body and serves as a shut-off.
  • a travel control of the hydraulic cylinder e.g. by way of a proportional return path return valve is required in the present embodiment to adjust the position of the piston rod so that when the adapter nozzle is pressed against the end of the high pressure component during purging, the valve seat remains open and closed during autofrettage.
  • the device has a first hydraulic cylinder for displacing the shut-off body in a valve main body of the high-pressure valve unit.
  • the shut-off is displaceable in the valve body, while the valve seat forming Adaptierdüse is firmly anchored in the valve body.
  • a second hydraulic cylinder is provided for pressing the adapter nozzle of the valve body against the second end of the high-pressure component during the rinsing process.
  • the shut-off body is designed as a high-pressure pipe or communicates with a high-pressure pipe in connection, at the end facing away from the high-pressure component, the pressure detection unit is mounted.
  • the high-pressure tube can be screwed into the valve body in an axial extension to the adapter, so that it can be dispensed with the provision of a transverse bore for the arrangement of the pressure detection unit in the valve block.
  • the high-pressure pipe can either itself serve as a shut-off body or with another component, e.g. a rinsing nozzle to be connected as a shut-off.
  • the shut-off body is formed by an adapter nozzle for connecting the high-pressure valve unit to the second end of the high-pressure component.
  • the second end of the high-pressure component here serves - as in the embodiments described above - as a seat for fluid-tight adaptation of the adapter.
  • the adapter nozzle is not pressed against the second end of the high-pressure component during rinsing but only during autofretting, while the adaptation during rinsing is opened in order to release the connection to the rinsing channel, i. the second end of the high pressure component acts as a valve seat for the adapter nozzle.
  • valve seat Since the high autofrettage pressure of up to 15000 bar requires high forces in the sealing of the valve, the valve seat is subject to a certain wear over a longer service life of the device.
  • the provision of the valve seat on the high-pressure component is advantageous since the valve seat on the high-pressure component only has to be actuated once to change from rinsing to autofretting.
  • the Adaptierdüse of a rinsing sleeve slidably mounted against a spring force for connection to an outer edge of the second end of the high pressure component, wherein between the rinsing sleeve and the Adaptierdüse a connected to the purge passage gap is formed.
  • the high-pressure component is designed in the form of a pipeline, this typically has a flange at both ends, which can be adapted by the flushing sleeve, wherein the geometry of the flushing sleeve is adapted or adapted to the geometry of the flange.
  • the autofrettage fluid can reach the flushing channel through the gap formed between the flushing sleeve and the adaptation nozzle. Due to the high flow velocity of the fluid creates a dynamic pressure, which presses the flushing sleeve in addition to the spring force and thus increases the sealing effect. Autofretting takes place here after adapting or pressing the adapter nozzle against the second end of the high-pressure component, in which the gap is closed and thus the connection to the flushing channel is interrupted.
  • the device has a path-controlled hydraulic cylinder with a piston rod on which a valve main body of the high-pressure valve unit is formed.
  • the piston rod with the valve body can be moved away by means of a proportional directional control valve with Wegegur arrangement to first adapt the purging sleeve and then the Adaptierdüse at the second end of the high-pressure component or the pipeline and so to realize the two valve positions for rinsing and autofrettage.
  • the pressure detection unit is arranged on an end remote from the high-pressure component of a pressure port formed in the hollow-drilled piston rod.
  • the pressure port communicates with the adapter nozzle via a pressure screw and is inserted into the hollow-bored piston rod.
  • it can be dispensed with the provision of a high-pressure tube as a connection between the adapter and the pressure detection unit.
  • the flushing channel is typically formed as a transverse bore in a valve main body of the high-pressure valve unit.
  • the connection of the flushing channel or the transverse bore is separated when the high-pressure component is subjected to the autofrettage pressure from the high-pressure component, so that the flushing channel is not exposed to the autofrettage pressure.
  • FIGS. 2a , b show a high pressure valve unit 7a, which the high pressure valve unit 7 in the Autofrettagevortechnik 1 of Fig. 1 replaced.
  • the high pressure valve unit 7a is different from that of FIG Fig. 1 initially characterized in that the Adaptierdüse 6 at its end facing away from the pipe 5 forms a conical valve seat 24 .
  • the Adaptierdüse 6 is also slidably mounted along its longitudinal axis in the valve block 14.
  • a coil spring 25 generates a spring force on the adapter nozzle 6 in the direction of the second end 3b of the pipeline 5.
  • the valve block 14 is provided on a piston rod 22 of a hydraulic cylinder 23.
  • the piston rod 23 is controlled by means of a (not shown) proportional directional valve with position feedback.
  • a high-pressure channel 27 is formed in the form of a longitudinal bore, which in the in Fig. 2b shown, closed valve position directly adjoins the adapter nozzle 6 to the high pressure sensor 19, which is arranged at the end remote from the pipe 5 end of the high pressure passage 27, to connect to the pipe 5.
  • FIGS. 3a , b An alternative embodiment of the high-pressure valve unit 7b, in which the function of rinsing and autofrettage is taken over by two independently actuable hydraulic cylinders 23a, 23b , is in FIGS. 3a , b and will be described below.
  • the first hydraulic cylinder 23a serves to displace the high-pressure pipe 26 mounted in a hollow-drilled piston rod 22a of the first hydraulic cylinder 23a in a valve main body 14.
  • a scavenging nozzle 28 which serves as a shut-off body and in which a high-pressure channel 27 is formed which connects the high-pressure sensor 19 to the pipeline 5 via the immediately adjoining high-pressure pipe 26.
  • the valve body 14 is attached to a piston rod 22b of the second hydraulic cylinder 23b.
  • the piston rod 22b of the second hydraulic cylinder 23b encloses the piston rod 22a of the first hydraulic cylinder 23a.
  • the piston rod 22a of the first hydraulic cylinder 23a is moved so far until the flushing nozzle 28 on Valve seat 24 of the adapter nozzle 6 sealingly abuts, as in Fig. 3b is shown.
  • FIGS. 4a , b A third embodiment of the high-pressure valve unit 7c, in which the valve seat 24 is formed for the fitting 6 serving as shut-off at the second end 3b of the pipe 5, is in FIGS. 4a , b shown.
  • the integral in the valve body 14 Adaptierdüse 6 is in this case surrounded by a rinsing sleeve 29 , which in the in Fig. 4a shown rinsing process is pressed against a bead formed on the outer edge 30 of the second end 3b of the pipe 5.
  • the flushing sleeve 29 is displaceable in the valve main body 14 in the longitudinal direction against the spring force of a coil spring 25 and sealed against the valve body 14 by means of a hydraulic seal 31 .
  • a gap 32 is formed, which at the in Fig. 4a shown rinsing the Spülbohrung 16 connects to the pipe 5.
  • Fig. 4b shown Autofrettage the Adaptierdüse 6 by means of a hydraulic cylinder 23 to which the valve body 14 is mounted, and the valve seat 24 is closed at the second end 3b of the pipe 5.
  • the piston rod 22 with the valve body 14 is hereby moved away by means of a proportional directional valve control with Wegegur arrangement to first adapt the rinsing sleeve 29 and subsequently the Adaptierdüse 6 at the second end 3b of the pipe 5 and so can realize the two valve positions for rinsing and autofrettage.
  • a pressure port 33 is formed in the hollow piston rod 22 and is connected to the adapter nozzle 6 via a pressure screw 34 .
  • the pressure detection unit 19 is arranged at the end of the pressure connection 33 facing away from the pipeline 5, so that the provision of a high-pressure pipe for connecting the pressure detection unit 19 can be dispensed with in this case.
  • a cable connection 35 extending in the hollow-bored piston rod 22 serves to make contact with the pressure detection unit 19 arranged in the piston rod 22.
  • valve seat 24 in contrast to the in FIGS. 2a, b and FIGS. 3a, b shown embodiments not formed on the adapter nozzle 6, but on the pipe 5 itself, so that no wear of the valve seat can occur during repeated switching between rinsing and autofrettage.
  • the high-pressure valve unit 7a-c it is possible to dispense with a bore branch in the region of the valve main body 14 in which the autofrettage pressure is applied, whereby the fatigue strength of the autofrettage device 1 or the high-pressure valve unit 7 can be increased significantly.
  • the high-pressure valve units 7a-c possibly suitably modified, can be used not only for autofrettage of pipelines, but also for autofrettage of other high-pressure components, such as e.g. used in diesel injection systems of motor vehicles, in water jet cutting or in the high-pressure pasteurization of foods.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Nozzles (AREA)
  • Fuel-Injection Apparatus (AREA)
EP09010857A 2009-08-25 2009-08-25 Autofrettagevorrichtung für Hochdruckbauteile, insbesondere für Rohrleitungen Not-in-force EP2298940B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09010857A EP2298940B1 (de) 2009-08-25 2009-08-25 Autofrettagevorrichtung für Hochdruckbauteile, insbesondere für Rohrleitungen
PL09010857T PL2298940T3 (pl) 2009-08-25 2009-08-25 Urządzenie samowzmacniające dla wysokociśnieniowych elementów konstrukcyjnych, zwłaszcza dla przewodów rurowych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09010857A EP2298940B1 (de) 2009-08-25 2009-08-25 Autofrettagevorrichtung für Hochdruckbauteile, insbesondere für Rohrleitungen

Publications (2)

Publication Number Publication Date
EP2298940A1 EP2298940A1 (de) 2011-03-23
EP2298940B1 true EP2298940B1 (de) 2012-08-08

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Application Number Title Priority Date Filing Date
EP09010857A Not-in-force EP2298940B1 (de) 2009-08-25 2009-08-25 Autofrettagevorrichtung für Hochdruckbauteile, insbesondere für Rohrleitungen

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EP (1) EP2298940B1 (pl)
PL (1) PL2298940T3 (pl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018134063A1 (de) 2017-01-20 2018-07-26 Uhde High Pressure Technologies Gmbh Vorrichtung und verfahren zum autofrettieren eines werkstücks

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011118484A1 (de) 2011-11-12 2013-05-16 Volkswagen Aktiengesellschaft Verfahren zur Steigerung der Festigkeit eines Bauteils
CN102764809B (zh) * 2012-07-17 2014-08-20 浙江摩多巴克斯汽配有限公司 一种内高压成型装置
CN102886458B (zh) * 2012-09-24 2014-09-24 重庆科技学院 汽车驱动桥整体复合内高压流量式胀形工艺
CN114231716B (zh) * 2021-12-28 2024-11-05 浙江奥加汽车零部件制造有限公司 一种内壁强化装置

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
GB825783A (en) * 1956-04-27 1959-12-23 James Francois Emile Basset Method and apparatus for treating hollow or tubular workpieces
DE4312589C2 (de) * 1992-10-27 1998-07-09 Mannesmann Rexroth Ag Hydraulisches System für eine Umformpresse
DE19521101A1 (de) * 1995-06-09 1996-12-12 Rexroth Mannesmann Gmbh Hydraulische Druckübersetzereinheit, insbesondere für eine nach dem Innenhochdruckumformverfahren arbeitende Presse
EA001238B1 (ru) * 1997-04-16 2000-12-25 Косма Интернэшнл Инк. Пресс для гидроформинга высокого давления
DE102006054440B3 (de) * 2006-11-16 2007-12-13 Maximator Gmbh Autofrettageverfahren und Autofrettagevorrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018134063A1 (de) 2017-01-20 2018-07-26 Uhde High Pressure Technologies Gmbh Vorrichtung und verfahren zum autofrettieren eines werkstücks
DE102017200917A1 (de) 2017-01-20 2018-07-26 Thyssenkrupp Ag Vorrichtung und Verfahren zum Autofrettieren eines Werkstücks
US11298737B2 (en) 2017-01-20 2022-04-12 Uhde High Pressure Technologies Gmbh Device and method for the autofrettage of a workpiece

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Publication number Publication date
EP2298940A1 (de) 2011-03-23
PL2298940T3 (pl) 2013-01-31

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