EP3433524A1 - Élément de raccordement pour le raccordement étanche aux gaz avec d'autres composants pour des systèmes de canalisations - Google Patents

Élément de raccordement pour le raccordement étanche aux gaz avec d'autres composants pour des systèmes de canalisations

Info

Publication number
EP3433524A1
EP3433524A1 EP17722653.7A EP17722653A EP3433524A1 EP 3433524 A1 EP3433524 A1 EP 3433524A1 EP 17722653 A EP17722653 A EP 17722653A EP 3433524 A1 EP3433524 A1 EP 3433524A1
Authority
EP
European Patent Office
Prior art keywords
connecting element
gas
tight connection
pipeline system
further component
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.)
Withdrawn
Application number
EP17722653.7A
Other languages
German (de)
English (en)
Inventor
Bernhard Luckscheiter
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.)
Allectra GmbH
Original Assignee
Allectra 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 Allectra GmbH filed Critical Allectra GmbH
Publication of EP3433524A1 publication Critical patent/EP3433524A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
    • F16L23/20—Flanged joints characterised by the sealing means the sealing means being rings made exclusively of metal

Definitions

  • the invention is directed to a connecting element for gas-tight connection with a further component of a pipeline system and a method for its production.
  • Typical flange systems are Conflat flanges (CF flanges) according to ISO / TS 3669-2: 2007. These flanges are designed for vacuum applications at temperatures up to 450 ° C. For pipelines for low temperatures (4 K), high temperatures (300 ° C) and / or high pressures (up to 500 bar) to typically 1 "(25.4 mm) diameter, eg VCR® connections with metallic sealing washers are used made of elastomer or plastic can not be used in these applications (low temperatures: no reliable sealing, high temperatures: destruction of the seal, high pressure: not stable enough, generally: gas permeability too high)
  • Gas supplies are used metallic gaskets.
  • Sealing materials made of copper, nickel and stainless steel are used as sealing material. In order to obtain the necessary strength in the area of the seal, flanges and
  • flanges and tubes made of aluminum and aluminum alloys are advantageous.
  • Aluminum is easily machinable, non-magnetic, can be extruded, has high thermal conductivity and is made by radioactive radiation only little activated.
  • aluminum exits less than steel and less "pollutes" the vacuum.
  • flanges are used which typically have a hard side made of stainless steel and for the most part consist of aluminum (US5836623). This system is difficult to manufacture (e.g.
  • flanges made of aluminum which have a sealing surface which is hardened by means of ion implantation (DE29918170).
  • the sealing surface can be coated with diamond-like carbon. Disadvantages of this method are high production costs, low wear resistance due to the small layer thickness, the low temperature stability of 150 ° C and the commonly used
  • connection element described in claim 1 The object is achieved by the connection element described in claim 1 and by the method described in claim 13 for its preparation.
  • Connecting element made of light metal or a light alloy is made of light metal or a light alloy.
  • the light metal is aluminum or an aluminum alloy.
  • connection is cheaper to produce.
  • connection is a detachable connection.
  • the connecting element is a flange.
  • Gas-tight pipe flange connections are used in vacuum technology for many
  • the flange according to the invention consists of an aluminum alloy with an aluminum content of at least 50%, preferably at least 60% and particularly preferably at least 80%. Flanges made of this material are simpler and thus less expensive to produce than their production, for example made of steel.
  • Aluminum has a lower specific gravity than steel and is therefore easier to handle. In addition, it has a high thermal conductivity (important if the system is heated up to 200 ° C or a high heat transfer is beneficial).
  • the outgassing rate under ultra-high vacuum conditions is also lower than that of steel, so the vacuum is less "contaminated".
  • this coating is according to the invention a nickel-based coating. Coatings are nickel-based
  • the coatings can be applied in different ways.
  • the nickel-based coating has no ferromagnetic properties.
  • This nickel coating can be one
  • the nickel-based coating can be composed of several individual layers.
  • the layers can be applied both galvanically and chemically and by the precise control of the
  • Layer construction may have properties such as hardness, surface accuracy and
  • Wear resistance can be varied specifically.
  • the magnetic properties of the coating can be controlled in addition to the hardness. With increasing Phosphorus content decreases the hardness of the coating.
  • a nickel-based coating with a phosphorus content of 5 wt.% Has a hardness of 600 HV 0, 1, with 13 wt.% Phosphor only a hardness of 500 HV 0, 1.
  • the function of the coating is to increase the hardness in the region of the seal and thus the distribution of the sealing force over a larger area of the softer base material of the connecting element. Therefore, in a development of the invention, only the area of the sealing surface is coated. For reasons of production, however, a larger area can also be coated.
  • the metallically hard coating has a layer thickness of at least 25 ⁇ m.
  • the coating has a thickness of 30 ⁇ , particularly preferably a layer thickness of at least 50 ⁇ .
  • the connecting element according to the invention has a high thermal stability. Ultra high vacuum aluminum systems are heated up to 200 ° C. The nickel-based coating is long-term stable under these temperatures. An interdiffusion or
  • the connecting element according to the invention has a high mechanical
  • Strength tensile strength Rm greater than 150 MPa, so that it does not deform under high heat.
  • the strength of pure aluminum is typically about 70 MPa.
  • the metallically hard layer can be applied to the connecting element according to the invention
  • the metallic hard layer may also be applied by a pulse deposition method.
  • the voltage is thereby pulsed, thereby the structure of the layer can be controlled within wide ranges and the hard layer can be adjusted to the desired values.
  • the Happy-Plating-Rampart method ⁇ can also be used. In this
  • Pulsabscheidevon complex layer systems can be applied.
  • the layer thickness is applied evenly at the edges.
  • Fig. 1 is a cross-sectional view of a compound according to the invention of two flanges with pipe socket
  • Fig. 2 is a cross-sectional view of a flange according to the invention of a flange with pipe socket and a blind flange
  • Figure 1 shows a pipe connection according to the invention from the side, which are interconnected by means of a union nut and screw.
  • This compound is typically used for gas supplies and high purity gases (brand name VCR ⁇ Swagelock).
  • the pipe diameter is up to 1 "(25.4 mm), and larger pipe diameters can be achieved with other union connectors or other flanges.
  • the main body of the flange with pipe socket 1, 1 ' consists of an aluminum alloy, e.g. AW-6060th This alloy is widely used in these applications, it is very weldable with a tensile strength of 240 N / mm2.
  • the sealing disc 3 is made of aluminum or copper. Their thickness depends on the diameter 1 to 2 mm.
  • the nickel-based coating 2, 2 ' is applied to the areas that are in contact with the seal.
  • the coating has a thickness of 50 to 60 ⁇ and is applied with the Happy-Plating-Rampart method ⁇ . This results in a multicrystalline layer with a hardness of 500 HV 0.1.
  • the tubes may be coated completely or over a wider area, which may provide additional protection against corrosion.
  • FIG. 2 shows the connection surface of a connecting element 1 according to the invention for connection to further components 1 ', 5 of a pipeline system.
  • the coating 2 extends only over the contact area, which comes into contact with a seal 3.
  • the Ni-base alloy coating 2 is made by the Happy-Plating-Rampart method
  • Figure 3 shows a flange connection according to the invention in cross section, as used in ultra high vacuum applications (pressures less than 10-9 mbar) is used.
  • the flange 1 with a pipe socket consists of the aluminum alloy 6082-T6 with a tensile strength of more than 300 N / mm2. Flange and pipe socket can be made in one piece or welded together.
  • the pipe socket has a sealing edge for metal seals (according to ISO 3669-2).
  • the flange 5 is designed in this embodiment as a blind flange.
  • the metal seal 3 typically consists of oxygen-free copper with a hardness of about 65 HB or soft annealed copper (about 45 HB). Aluminum seals are rarely used.
  • the flanges 1 and 5 are provided with a nickel-based coating at least in the region of the cutting edge.
  • the coating in this embodiment has a phosphorus content of greater than 9% and is therefore not ferromagnetic.
  • the coating can be applied only in the region of the cutting edge to further reduce the magnetic influences.
  • the coating is then annular with a width of about 4 mm.
  • the nickel-based coating has a thickness of 50 to 100 ⁇ and was applied by the Happy-Plating-Rampart method ⁇ .
  • the hardness is 500 HV 0, 1.
  • the coating is free of stress and pores and seals reliably even at high temperatures of up to 200 ° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Abstract

L'invention concerne un élément de raccordement (1) pour le raccordement étanche aux gaz avec un autre composant (1', 5) d'un système de canalisations, l'élément de raccordement étant constitué d'un métal léger ou d'un alliage de métal léger et comprenant une surface d'étanchéité. La surface d'étanchéité est une surface de contact avec le composant à raccorder et présente sur la surface supérieure un revêtement métallique dur (2).
EP17722653.7A 2016-03-21 2017-03-15 Élément de raccordement pour le raccordement étanche aux gaz avec d'autres composants pour des systèmes de canalisations Withdrawn EP3433524A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016105168.3A DE102016105168A1 (de) 2016-03-21 2016-03-21 Verbindungselement zur gasdichten Verbindung mit weiteren Bauteilen für Rohrleitungssysteme
PCT/DE2017/100208 WO2017162235A1 (fr) 2016-03-21 2017-03-15 Élément de raccordement pour le raccordement étanche aux gaz avec d'autres composants pour des systèmes de canalisations

Publications (1)

Publication Number Publication Date
EP3433524A1 true EP3433524A1 (fr) 2019-01-30

Family

ID=58698890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17722653.7A Withdrawn EP3433524A1 (fr) 2016-03-21 2017-03-15 Élément de raccordement pour le raccordement étanche aux gaz avec d'autres composants pour des systèmes de canalisations

Country Status (3)

Country Link
EP (1) EP3433524A1 (fr)
DE (1) DE102016105168A1 (fr)
WO (1) WO2017162235A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11125373B2 (en) * 2018-03-07 2021-09-21 The Rendely Connection Structural connection between in-line pipes and tubes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5836623A (en) 1996-09-20 1998-11-17 Bothell; Richard D. Connector system for use in ultra-high vacuum systems
DE29918170U1 (de) 1999-10-08 2000-02-03 Deutsches Elektronen Synchr Flansch für die Anwendung auf dem Gebiet der Ultra-Hoch-Vakuum-Technik
AT506583B9 (de) * 2008-10-23 2009-12-15 Happy Plating Gmbh Elektrochemisches beschichtungsverfahren
WO2013133762A1 (fr) * 2012-03-08 2013-09-12 Swedev Ab Racle à revêtement multicouche réalisée par électrodéposition sous impulsions de courant

Also Published As

Publication number Publication date
WO2017162235A1 (fr) 2017-09-28
DE102016105168A1 (de) 2017-09-21

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