WO2024200973A1 - Traversée de cloison - Google Patents
Traversée de cloison Download PDFInfo
- Publication number
- WO2024200973A1 WO2024200973A1 PCT/FR2024/050404 FR2024050404W WO2024200973A1 WO 2024200973 A1 WO2024200973 A1 WO 2024200973A1 FR 2024050404 W FR2024050404 W FR 2024050404W WO 2024200973 A1 WO2024200973 A1 WO 2024200973A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pin
- housing
- bulkhead
- glass
- metal
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C29/00—Joining metals with the aid of glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/32—Non-oxide glass compositions, e.g. binary or ternary halides, sulfides or nitrides of germanium, selenium or tellurium
- C03C3/321—Chalcogenide glasses, e.g. containing S, Se, Te
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/521—Sealing between contact members and housing, e.g. sealing insert
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/73—Means for mounting coupling parts to apparatus or structures, e.g. to a wall
- H01R13/74—Means for mounting coupling parts in openings of a panel
Definitions
- the present disclosure relates to a bulkhead feedthrough and a method of manufacturing such a bulkhead feedthrough.
- bulkhead feedthroughs are devices allowing one or more lines to pass through a bulkhead, such as a machine casing or a room enclosure, without compromising the sealing of the bulkhead.
- thermoplastic material used for part of the housing of this bulkhead feedthrough belongs to the PEEK (PolyEther Ether Ketone) group which has a coefficient of thermal expansion of the order of 50 ppm/°C, which represents a significant deviation from the coefficients of thermal expansion of the metal and ceramic components of these same bulkhead feedthroughs.
- PEEK PolyEther Ether Ketone
- the thermoplastic materials of the PEEK group although among the most efficient in terms of thermal and mechanical resistance, have a glass transition temperature of around 150°C and a melting temperature of around 350°C.
- the present disclosure relates to a bulkhead feedthrough, comprising a housing, made of metal, comprising a front surface, a rear surface and a peripheral surface, configured to be engaged in a through passage of a bulkhead, the peripheral surface of the housing comprising at least one peripheral groove configured to receive a seal intended to be crushed between the housing and the internal surface of the passage, at least one pin, made of metal, having a diameter greater than or equal to 1 mm, completely passing through the housing and projecting, on one side, on the front surface of the housing and, on the other side, on the rear surface of the housing, and at least one sleeve, made of glass, surrounding said at least one pin at least from the front surface to the rear surface of the housing so as to electrically insulate said at least one pin from the housing, wherein said at least one pin is made of copper or a copper alloy, said pin possibly having undergone a surface treatment, wherein the material of the sleeve is a tellurium oxide-based glass having the composition consisting of
- TeO2 from 50 to 80% of TeO2, advantageously from 50 to 70%;
- oxide o x O y from 0 to 20% of an oxide o x O y , advantageously from 2 to 10%, a being an element chosen from the group consisting of Ba, Ce, Er, Sb, Y, La and B, x being an integer equal to 1 or 2 and y an integer equal to 1, 2 or 3;
- composition being essentially free of lead oxide, sodium oxide, potassium oxide and vanadium oxide.
- Such a configuration is made possible by the glass composition selected by the inventor. Indeed, this glass composition offers both good electrical insulation between the pin, metallic, and the housing, also metallic, good mechanical and thermal resistance of the seal between the pin and the housing and, above all, good hermeticity ensuring good sealing of the bulkhead crossing, including at high pressure and high temperature. It will be noted that the pressure to which the partition wall crossing is for example an axial pressure, that is to say directed along the axis of the partition wall crossing.
- ZnO allows the glass composition to have good stability.
- TiO2 provides excellent durability to the glass.
- the optional additional oxide o x O y improves the stability, wettability and/or thermal expansion coefficient of the glass.
- the MIL-STD-883 standard of April 2016 is one of the standards explaining the method for measuring the leak rate for electronic components.
- the part is hermetically fixed (using a seal and suitable tightening) on a chamber under vacuum. It is advantageous to have the lowest possible pressure in this chamber to have the best sensitivity. Indeed, the lower the pressure, the fewer gas molecules in the chamber and therefore residual helium, which reduces background noise.
- the standard requires a pressure lower than 0.13mbar (O.ltorr).
- This chamber is connected to a calibrated mass spectrometer to achieve the expected helium leak rate. Calibration must be done at each period of use, using a calibrated diffusion-type leak.
- the tightness of the assembly must be checked with a flat metal plate. This is done by spraying the plate with helium using a gun. If the detector does not detect helium during this check, the assembly is correct and the parts can be tested in the same way, by spraying them with helium.
- a good level of hermeticity of bulkhead penetration depends mainly on the sealing carried out at the interfaces of the conductive metal components and those made of insulating mineral materials. The inventor has thus measured that the bulkhead penetrations obtained have a level of hermeticity less than or equal to 10 11 mbar.l/s measured according to this Mil-STD-883 standard of April 2016.
- this glass composition selected by the inventor makes it possible to ensure the desired hermeticity, including when the glass sleeve completely passes through the bulkhead, the use of a thermoplastic element directly in contact with the pin over at least part of its length is no longer necessary.
- the inventor then took advantage of this improved glass sleeve to propose a completely metallic housing, also completely passing through the bulkhead, without any portion or even thermoplastic insert.
- the partition wall crossing configuration defined above is particularly simple to design and produce insofar as it comprises only three components or types of components (apart from the seal(s) which will subsequently be added to the partition wall crossing, before it is installed in the through passage of the partition wall) which are the metal housing, the metal pin and the glass sleeve or insert arranged between the housing and the pin. There is therefore no other part between the housing and the sleeve, nor any other part between the sleeve and the pin, which considerably simplifies the design and manufacture, and therefore the associated costs.
- the housing and the sleeve are each formed from a single piece, which considerably simplifies the design and manufacture, and therefore the associated costs compared to a configuration where, for example, the sleeve and/or the housing would each be formed from several pieces with possibly different materials from one piece to another.
- the present configuration only one type of interface is present: metal/glass. Due to limited number of components and interface type, the probability of manufacturing defects is reduced and therefore the production reject rate is also reduced. Risks malfunction of such a bulkhead fitting in a harsh environment (high temperature and/or pressure) are also reduced for the same reasons.
- Such a bulkhead fitting does not contain any substance or chemical element likely to pollute the environment and which would be covered by European standards or directives.
- an all-metal housing improves the robustness, dimensional stability, aesthetic appearance and assembly options of the bulkhead bushing. It also reduces the number of interfaces between the various components of the bulkhead bushing, which improves its high-temperature behavior, particularly in the face of differential expansion issues.
- this glass composition has the additional advantage of having a coefficient of thermal expansion close to that of metallic materials, in particular those used for the housing and the spindle.
- the coefficient of thermal expansion is measured in the context of this presentation on a TMA from TA instrument (TMA 2940), with a ramp of 2°/min from 30 °C to 250 °C.
- composition of the glass based on tellurium oxide is free of Bi 2 O 3 .
- the composition of the tellurium oxide-based glass is free of Al 2 O 3 , F and/or PbF 2 .
- the unavoidable impurities in the composition of the tellurium oxide-based glass can be chosen from lead (Pb), iron (Fe), copper (Cu), arsenic (As), antimony (Sb), calcium (Ca), carbonate (CO 3 ), magnesium (Mg), potassium (K), sodium (Na), phosphorus (P), chlorine (Cl), silicon (Si), sulfur (S) and mixtures thereof.
- the total content of unavoidable impurities is generally less than or equal to 0.1105% (1105 ppm).
- tellurium oxide-based glass means any glass whose main component of the composition is tellurium oxide. (TeCh), advantageously of which TeCb is present in a content higher than the other components, even more advantageously in a content of at least 50% in molar percentage, even more advantageously of at least 60% in molar percentage.
- a material is based on a given element when this element is the main element of the composition of the material, advantageously when this element is present in a content greater than the other components, even more advantageously in a content of at least 50% in molar percentage, even more advantageously of at least 60% in molar percentage.
- the housing has a length, measured between its front surface and its rear surface, greater than or equal to 10 mm, preferably greater than or equal to 30 mm.
- the peripheral surface of the housing comprises a shoulder delimiting two housing portions having different contours. This shoulder can constitute a stop when fixing the bulkhead bushing in the bulkhead.
- the housing is configured to be secured within the passage of the partition.
- the housing includes a securing portion configured to cooperate with a securing portion of the passage of the partition, the securing portion preferably including at least one thread.
- the alloy or metal of the housing has a coefficient of thermal expansion greater than 16 ppm/°C.
- the metal of the housing has a coefficient of thermal expansion relatively close to the other materials of the bulkhead feedthrough, which reduces differential expansion phenomena.
- the alloy or metal of the housing is stainless steel, in particular 304L or 316L. These alloys have a coefficient of thermal expansion of the order of 17 ppm/°C.
- the alloy or metal of the housing is selected from the group consisting of nickel and nickel-based alloys, in particular Ni-Fe, Ni-Fe-Cr or Ni-Fe-Cr-Mo. These alloys have a coefficient of thermal expansion of the order of 13 ppm/°C.
- the bulkhead feedthrough includes at least one seal installed in the at least one peripheral groove of the peripheral surface of the housing. This seal is useful for reducing leakage rate in the bulkhead passage once the bulkhead feedthrough is secured.
- said at least one seal is an O-ring.
- said at least one seal is an elastomeric seal.
- the bulkhead passage includes two gaskets, each installed in a different peripheral groove of the peripheral surface of the housing, configured to be crushed between the housing and the internal surface of the passage.
- said at least one pin has a diameter greater than or equal to 2 mm, preferably greater than or equal to 3 mm.
- said at least one pin is solid.
- said at least one pin has a length greater than or equal to 30 mm, preferably greater than or equal to 50 mm.
- the at least one pin protrudes at least 5 mm, preferably at least 10 mm, from each of the front and rear surfaces of the housing.
- said at least one pin comprises, at at least one of its ends, a solder barrel or a crimping barrel.
- said at least one pin is made of a copper-based alloy comprising beryllium, zinc, nickel, tin and/or zirconium, possibly coated.
- This may in particular be a Cu-Be or Cu-Be-Co alloy.
- These alloys present a good compromise between electrical, mechanical and thermal properties. They also have a coefficient of thermal expansion of between 16 and 18 ppm/°C.
- At least one pin is provided with a coating comprising at least one nickel-based layer of at least 1 ⁇ m thickness.
- a nickel layer promotes the adhesion of the glass sleeve to the pin, which makes it possible to improve the hermeticity of the bulkhead feedthrough, in particular at high pressure and high temperature.
- the thickness of the nickel-based layer is between 1 and 10 ⁇ m, preferably between 4 and 8 ⁇ m.
- the nickel-based layer comprises phosphorus, the content of which is preferably between 6 and 9% by mass.
- the nickel-based layer of the coating of at least one pin is oxidized at least on the surface. This makes it possible to further promote the attachment of the glass to the pin.
- the glass composed of the TZT or TZTC oxides has a strong affinity with the oxidized Ni-P alloy.
- the coating of at least one pin comprises a copper-based underlayer of at least 0.1 ⁇ m thickness.
- this underlayer is made of pure copper, with any unavoidable impurities.
- This copper underlayer promotes the adhesion of the nickel layer to the pin, which makes it possible to further improve the hermeticity of the bulkhead feedthrough.
- the thickness of the copper-based underlayer is between 0.2 and 1 ⁇ m.
- the bulkhead feedthrough comprises a plurality of pins, optionally at least ten and even at least twenty pins, each pin having a diameter greater than or equal to 1 mm, passing right through the housing and projecting, on one side, on the front surface of the housing and, on the other side, on the rear surface of the housing, wherein a separate glass sleeve surrounds each pin at least from the front surface to the rear surface of the housing.
- At least two pins have different diameters.
- said at least one sleeve has a thickness greater than or equal to 0.3 mm, preferably greater than or equal to 0.7 mm, for example between 0.3 and 2.0 mm, preferably between 0.7 and 1.5 mm.
- the bulkhead feedthrough comprises multiple sleeves having different thicknesses.
- the tellurium oxide glass composition comprises oxide o x O y selected from the group consisting of Y 2 O 3 , CeO 2 , Sb 2 O 3 , Er 2 O 3 , La 2 O 3 , B 2 O 3 and BaO, particularly from the group consisting of CeO 2 , Sb 2 O 3 , La 2 O 3 , Y 2 O 3 and B 2 O 3 , more particularly CeO 2 .
- the coefficient of thermal expansion of the composition of the tellurium oxide-based glass is between 11 and 22 ppm/°C, advantageously between 12 and 16 ppm/°C. This coefficient of thermal expansion is then close to or even lower than that of the pin and the housing, which reduces the differential expansion phenomenon and therefore increases the resistance of the bulkhead feedthrough to high temperature.
- the composition of the tellurium oxide-based glass has a chemical durability of between 1.10' 6 and 1.10' 8 g/(cm 2 .min) determined in Soxhlet at 95°C in demineralized water and continuously renewed according to the ISO 16797 standard of April 2004.
- the composition of the tellurium oxide-based glass has a glass transition temperature (Tg) of less than 500°C, advantageously between 250 and 400°C, in particular between 300 and 380°C. A low glass transition temperature makes it possible to obtain a glass-metal seal at a lower temperature.
- a glass transition temperature (Tg) that is too low is not of interest in the context of the present invention because it is appropriate to obtain a partition penetration having a temperature resistance of up to 200°C.
- a glass transition temperature (Tg) that is too low of the glass causes the glass to creep at these operating temperatures which can lead to loss of hermeticity.
- the Tg is measured using a DSC (Differential scanning calorimetry): DSC setaram (DSC 131). The measurement is carried out from 20 to 580 °C with a ramp of 10 °C/min.
- the temperatures Tg and Tx are the onset temperatures (start of phenomenon).
- said at least one sleeve is sealed between said at least one pin and the housing by glass-to-metal sealing.
- the bulkhead penetration has a helium leak rate of less than or equal to 10 11 mbar.l/s at 2000 bars and 200°C.
- the bulkhead feedthrough comprises only a metal housing, a metal pin and a glass sleeve disposed between the metal housing and the metal pin (with the exception of the aforementioned seal(s).
- the present disclosure further relates to an assembly or system comprising: - a partition in which a partition through-passage is formed, - a partition feedthrough in accordance with the brief disclosure above and which is inserted into the partition through-passage.
- the partition feedthrough may be fixed to the partition and in particular to the partition through-passage by various fixing means.
- the present disclosure also relates to a method of manufacturing a bulkhead feedthrough according to any one of the preceding embodiments, comprising the following successive steps: a) providing a metallic housing comprising a front surface, a rear surface and a peripheral surface; b) providing a pin, made of copper or copper alloy, optionally coated, having a diameter greater than or equal to 1 mm; c) providing a cylindrical preform of tellurium oxide-based glass having the composition as defined in any one of the preceding embodiments, the cylindrical preform having a longitudinal passage; d) inserting the pin into the longitudinal passage of the cylindrical preform and inserting the assembly formed by the pin and the cylindrical preform into a through passage of the housing; e) maintaining contact between the pin, the cylindrical preform and the housing using suitable tooling; f) heating the assembly formed by the pin, the cylindrical preform and the housing to a temperature and for a time sufficient to obtain the glass-metal seal; and g) recovering the assembly thus sealed.
- the method further comprises, after step b) and before step d), the following step: b') pretreatment of the pin resulting in providing the pin with a coating comprising at least one nickel-based layer of at least 1 ⁇ m thickness.
- a nickel layer promotes the adhesion of the glass to the pin.
- step b') comprises at least the following step: b2) nickel plating of the pin.
- This step can in particular be a step of auto-catalytic nickel plating, preference of the medium-phosphorus type.
- Auto-catalytic nickel plating is preferred to electrolytic nickel plating because it makes it easier to obtain thicker deposits.
- step b2) is carried out between 75 and 100°C, preferably between 85 and 90°C, for a duration of between 15 and 30 minutes, preferably between 20 and 25 minutes.
- step b') comprises, after step b2), the following step: b3) baking at at least 45°C for at least 3 minutes.
- This step allows at least part of the surface of the nickel layer to be oxidized. As explained above, this further promotes the adhesion of the glass to the pin.
- step b3) is carried out between 45 and 85°C, preferably between 55 and 75°C, for a duration of between 3 and 10 minutes, preferably between 3 and 7 minutes.
- step b') comprises, before step b2), the following step: bl) copper plating of the pin.
- This step can in particular be a cyanide copper plating step. As explained previously, such a layer of copper promotes the adhesion of the nickel layer on the pin.
- step b1) is carried out between 50 and 70°C, preferably between 55 and 65°C, for a duration of between 0.5 and 2 minutes, preferably between 0.5 and 1.5 minutes.
- step b1) is carried out with a current density of between 0.5 and 2 A/dm 2 , preferably between 0.7 and 1.3 A/dm 2 .
- step b') further comprises at least one degreasing step, preferably cathodic and/or anodic, a pickling step and/or a rinsing step.
- the method further comprises, after step b) and before step d), the following step: b*) mechanical alteration of all or part of the area which will be covered by the glass sleeve resulting in providing the surface of the pin with a roughness Ra at least equal to 3.2 pm, preferably at least equal to 6.3 pm.
- This step increases the roughness of the surface of the pin, which helps the glass adhere to the pin.
- step b*) is carried out so as to obtain a roughness Ra of between 3.2 and 50 pm, preferably of between 6.3 and 30 pm. Such roughness allows good adhesion of the glass to the pin, even when one or more coatings are deposited on the pin subsequently to the mechanical alteration step.
- step b* is carried out before step b'). This avoids altering the coating(s) deposited on the spindle.
- the method further comprises, after step g), the following step: h) installing a seal in a peripheral groove of the peripheral surface of the housing.
- step b) comprises providing a plurality of pins
- step c) comprises providing a plurality of preforms
- step d) comprises inserting each pin into the longitudinal passage of a separate preform and inserting the assembly into a single housing.
- the temperature of step f) is between 350 and 500°C, preferably between 400 and 500°C.
- the duration of step f) is between 30 and 80 minutes.
- Figure 1 is a sectional view of a first example of a partition wall crossing.
- Figure 2 is a sectional view of the bulkhead fitting of Figure 1, secured in a bulkhead.
- Figure 3 is a sectional view of an alternative embodiment of the first example of partition crossing.
- Figure 4 is a sectional view of another example of a bulkhead feedthrough comprising multiple pins.
- Figure 1 shows, in section along a vertical plane passing through its main axis A, a first example of a partition crossing 1. It comprises a housing metal 10, a metal pin 20, a glass sleeve 30 and two elastomer seals 40.
- the housing 10 has a shape of revolution around the main axis A. It thus comprises a front surface 11, a rear surface 12 and a peripheral surface 13.
- the front 11 and rear 12 surfaces are flat and orthogonal to the main axis A.
- the peripheral surface 13 comprises a main portion 13a, having the largest diameter, and a reduced portion 13b, having a diameter smaller than that of the main portion 13a; a radial shoulder 14 is thus formed at the junction between the main portion 13a and the reduced portion 13b.
- the peripheral surface 13 also comprises a projection portion 13c, of diameter smaller than that of the main portion 13a; a radial shoulder 15 is thus formed at the junction between the main portion 13a and the projection portion 13c.
- the peripheral surface 13 has, at its main portion 13a, at least one peripheral groove 16, here two in number, circumferential and extending 360° along the peripheral surface 13.
- the peripheral surface 13 also has, at its reduced portion 13b, a thread 17.
- the peripheral surface 13 further has, at its projection portion 13c, a circumferential bead 18.
- the metal housing 10 further comprises a longitudinal passage 19 extending axially, along the main axis A, from the front surface 11 to the rear surface 12, the longitudinal passage 19 thus opening on each side of the partition wall crossing 1.
- the housing 10 measures 3.7 cm, axially between its front surface 11 and rear surface 12; the diameter of its main portion 13a measures 1 cm.
- the metal pin 20 takes the form of a straight and solid rod extending axially along the longitudinal passage 19 of the housing 10.
- the metal pin 20 projects from each side of the housing 10.
- Each end of the pin 20 can be rounded.
- the diameter of the pin 20 is equal to 1.6 mm; the length of the pin is equal to 5.7 cm; it protrudes 1 cm on each side on the front surface 11 and the rear surface 12.
- the glass sleeve 30 is provided around the metal pin 20 so as to electrically insulate the latter from the metal housing 10.
- the glass sleeve extends from the front surface 11 of the housing 10 to its rear surface 12, thus having the same length as the housing 10.
- the length of the glass sleeve 30 is thus equal to 3.7 cm; its thickness is equal to 0.9 mm.
- the passage 91 has a main portion 91a, of larger diameter, and a reduced portion 91b, of smaller diameter than that of the main portion 91a; a radial shoulder 94 is thus formed at the junction between the main portion 91a and the reduced portion 91b.
- the reduced portion 91b further comprises a tapping 95.
- the diameter of the main portion 91a of the passage 91 is adjusted to the diameter of the main portion 13a of the housing 10 and the diameter of the reduced portion 91b of the passage 91 is adjusted to the diameter of the reduced portion 13b of the housing 10.
- FIG. 3 shows a bulkhead feedthrough 101 according to an alternative embodiment.
- the metal housing 110 and the glass sleeve 130 are unchanged.
- the metal pin 120 is configured differently.
- the metal pin 120 comprises, at one of its ends, in this case its rear end, a welding barrel 121 instead of a simple rod.
- the housing 210 is configured in a manner similar to the housing 10 of the first example, except that its diameter is larger to accommodate a greater number of pins 220.
- the metal housing 210 thus comprises a front surface 211, a rear surface 212 and a peripheral surface 213 comprising a peripheral groove 216, a shoulder 214 and a thread 217.
- the housing 210 comprises several longitudinal passages 219, all parallel, extending along the main axis A from the front face 211 to the rear face 212.
- each metal pin 220 is similar to the metal pin 20 of the first example, except that their diameters may vary, relative to the first example, but also between them. Thus, in the example shown in FIG. 4, the central pin is thicker than the peripheral pins. Although not shown, at least some pins 220 may of course comprise a weld barrel similar to that of FIG. 3.
- each metal pin 220 is further provided with an individual glass sleeve 230.
- Each glass sleeve 230 is similar to that of the first example, except that their thicknesses may vary, relative to the first example, but also between them. Thus, in the example shown in FIG. 4, the sleeve of the central pin is thicker than the sleeves of the peripheral pins.
- Example 1 - In this first example, corresponding to the example shown in FIG. 1, the housing 10 is made of 304L stainless steel (Fe-74%, Cr-18%, Ni-8%) having the reference UNS S30403.
- Pin 20 is obtained from a 1.6 mm pin made of copper and beryllium alloy (Cu-97.5%, Be-2.0%, Co-0.5%), generally known as Cu-Be and under the reference UNS C17200. This pin is then subjected to the following pretreatment.
- the pin is first subjected, on all or part of the area which will be covered by the glass sleeve 30, to a sandblasting operation.
- This sandblasting step makes it possible to mechanically alter the surface condition of the pin in order to obtain a roughness Ra greater than 6.3 pm.
- This sandblasting is followed by a double rinse.
- the spindle is then subjected to cathodic degreasing, carried out at 40°C, for 2 minutes, and with a current density of 1 A/dm 2 , then to anodic degreasing, carried out at 40°C, for 1 minute, and with a current density of 1 A/dm 2 .
- cathodic degreasing carried out at 40°C, for 2 minutes, and with a current density of 1 A/dm 2
- anodic degreasing carried out at 40°C, for 1 minute, and with a current density of 1 A/dm 2 .
- the pin is then subjected to METEX M629 pickling, carried out at 30°C and for 1 minute. This pickling is followed by a double rinse.
- the pin is then subjected to cyanide copper plating, carried out at 60°C, for 1 minute, and with a current density of 1 A/dm 2 .
- This cyanide copper plating step makes it possible to provide the Cu-Be pin with a surface layer of pure copper having a thickness of between 0.2 and 1.0 pm. This step is followed by a double rinse.
- the pin thus coppered is then subjected to MP nickel plating, carried out at 88°C, for 22 minutes.
- This MP (medium phosphorus) nickel plating step also called chemical or auto-catalytic nickel plating, makes it possible to provide the pin with a surface layer of nickel-phosphorus alloy which adheres favorably to the pure copper sub-layer of the pin.
- This layer in Nickel-phosphorus alloy comprises a phosphorus content of between 6 and 9% by mass.
- This nickel-phosphorus alloy layer has a thickness of at least 6 pm. This step is followed by a double rinse.
- the pin thus coppered and then nickeled is then subjected to a stoving process, carried out at 65°C for 5 minutes.
- This stoving step allows the Ni-P alloy layer to be oxidized in a controlled manner, which will promote the subsequent attachment of the glass of the sleeve 30.
- a cylindrical glass preform is then provided, this cylindrical preform being intended to form the glass sleeve 30.
- This glass has a composition called TZT including tellurium oxide, zinc oxide and titanium oxide. More precisely, in this first example, the composition of the glass is as follows: TeO2-65%, ZnO-30%, TiO2-5% (in molar percentages).
- the cylindrical preform is then engaged around the pin 20 and the assembly is engaged in the longitudinal passage 19 of the housing 10. Then, to produce the glass-metal seals, the metal-glass preform assembly is held in place using suitable tooling. Heating is carried out in an oven, without a protected atmosphere, at 420°C and for 45 minutes.
- the bulkhead crossing 1 thus obtained then has mechanical resistance to a pressure of 2000 bar and thermal resistance to a temperature of 280°C.
- the insulation resistance is measured using a megohmmeter under 500V DC.
- the insulation resistances obtained reach the detection limit of the device (20 Gohm).
- the helium hermeticity is measured using a helium leak detector (ASM 142 from Adixen) according to the MIL-STD-883 standard, conditions A4.
- the bulkhead penetration obtained has a level of hermeticity expressed as a helium leak rate of less than 10 11 mbar.l/s according to this measurement method defined by the Mil-STD-883 standard of April 2016.
- the bulkhead penetration maintains the same level of hermeticity after a so-called thermal shock test defined in the Mil-DTL-38999 standard of February 2015, which consists of subjecting the bulkhead penetration to 10 cycles of passage from cold water at 4°C to hot water at 90°C in less than 5 seconds for each passage.
- Example 2 In a second example, the components are as follows:
- TZTC glass insulator preform with a nominal composition in molar percentages (TeO 2 -65%, ZnO-27%, TiO 2 -5%, CeO 2 -3%).
- the bulkhead penetration is obtained by a glass/metal sealing operation at 420°C for 45 minutes, exhibiting mechanical resistance to a pressure of 2000 bar and thermal resistance to a temperature of 300°C.
- the bulkhead penetration obtained exhibits a hermeticity level of less than 10 11 mbar.l/s and retains the same hermeticity after the same thermal shock test.
- Example 3 In a third example, the components are as follows:
- TZTC glass insulator preform with a nominal composition in molar percentages (TeO 2 -65%, ZnO-27%, TiO 2 -5%, CeO 2 -3%).
- the bulkhead penetration is obtained by a glass/metal sealing operation at 420°C for 45 minutes, exhibiting mechanical resistance to a pressure of 2000 bar and thermal resistance to a temperature of 300°C.
- the bulkhead penetration obtained exhibits a hermeticity level of less than 10 11 mbar.l/s and retains the same hermeticity after the same thermal shock test.
- Example 4 - In a fourth example, the components are as follows:
- Ni-Fe alloy case called Invar with a nominal composition (Ni-36%, Fe-64%) referenced in UNS K93600;
- TZTC glass insulator preform with a nominal composition in molar percentages (TeO 2 -65%, ZnO-20%, TiO 2 -7%, CeO 2 -8%).
- the bulkhead crossing is obtained by a glass/metal sealing process at 430°C for 60 minutes, exhibiting mechanical resistance to a pressure of 2000 bar and thermal resistance to a temperature of 300°C.
- the bulkhead crossing obtained exhibits a level of hermeticity of less than 10 11 mbar.l/s and retains the same hermeticity after the same thermal shock test.
- Example 5 - In a fifth example, the components are as follows:
- Ni-Cr-Fe alloy case with a nominal composition (Ni-76%, Cr-16%, Fe-8%) referenced in UNS N06600;
- - 1 TZTC glass insulator preform with a nominal composition in molar percentages (TeO2-60%, ZnO-20%, TiO2-10%, CeO2-10%).
- the bulkhead penetration is obtained by a glass/metal sealing process at 400°C for 1 hour, exhibiting mechanical resistance to a pressure of 2000 bar and thermal resistance to a temperature of 300°C.
- the bulkhead penetration obtained exhibits a hermeticity level of less than 10 11 mbar.l/s and retains the same hermeticity after the same thermal shock test.
- Example 6 In a sixth example, the components are as follows:
- Ni-Cr-Fe alloy case with a nominal composition (Ni-64%, Cr-15%, Fe-5%, Mo-16%) referenced in UNS N 10276;
- the bulkhead penetration is obtained by a glass/metal sealing process at 400°C for 1 hour, exhibiting mechanical resistance to a pressure of 2000 bar and thermal resistance to a temperature of 300°C.
- the bulkhead penetration obtained exhibits a hermeticity level of less than 10 11 mbar.l/s and retains the same hermeticity after the same thermal shock test.
- Example 7 - In a seventh example, the components are as follows:
- - 1 TZTC glass insulator preform with a nominal composition in molar percentages (TeO2-70%, ZnO-15%, TiO2-5%, CeO2-10%).
- the bulkhead penetration is obtained by a glass/metal sealing operation at 420°C for 45 minutes, exhibiting mechanical resistance to a pressure of 2000 bar and thermal resistance to a temperature of 300°C.
- the bulkhead penetration obtained exhibits a hermeticity level of less than 10 11 mbar.l/s and retains the same hermeticity after the same thermal shock test.
- - 3 TZTC glass insulator preforms with a nominal composition in molar percentages (TeO2-65%, ZnO-27%, TiO2-5%, CeO2-3%).
- the bulkhead feedthrough thus including three pins in a single housing, is obtained by a glass/metal sealing operation at 420°C for 45 minutes, exhibiting mechanical resistance to a pressure of 2000 bar and thermal resistance to a temperature of 300°C.
- the bulkhead feedthrough obtained exhibits a level of hermeticity of less than 10' 11 mbar.l/s and retains the same hermeticity after the same thermal shock test.
- Example 9 - In a ninth example, the components are as follows:
- TZTC glass insulator preforms with a nominal composition in molar percentages (TeO2-65%, ZnO-27%, TiO2-5%, CeO2-3%).
- the bulkhead feedthrough therefore including three small diameter pins and two larger diameter pins, is obtained by a glass/metal sealing operation at 420°C for 45 minutes, exhibiting mechanical resistance to a pressure of 2000 bar and thermal resistance to a temperature of 300°C.
- the bulkhead feedthrough obtained exhibits a hermeticity level of less than 10 11 mbar.l/s and retains the same hermeticity after the same thermal shock test.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Joining Of Glass To Other Materials (AREA)
- Glass Compositions (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480022162.7A CN120882671A (zh) | 2023-03-29 | 2024-03-28 | 隔板馈通件 |
| EP24722053.6A EP4688681A1 (fr) | 2023-03-29 | 2024-03-28 | Traversée de cloison |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2303007A FR3147446A1 (fr) | 2023-03-29 | 2023-03-29 | Traversée de cloison |
| FRFR2303007 | 2023-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024200973A1 true WO2024200973A1 (fr) | 2024-10-03 |
Family
ID=87747887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2024/050404 Ceased WO2024200973A1 (fr) | 2023-03-29 | 2024-03-28 | Traversée de cloison |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4688681A1 (fr) |
| CN (1) | CN120882671A (fr) |
| FR (1) | FR3147446A1 (fr) |
| WO (1) | WO2024200973A1 (fr) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7364451B2 (en) | 2004-02-24 | 2008-04-29 | Ring John H | Hybrid glass-sealed electrical connectors |
| US7442081B2 (en) | 2004-02-27 | 2008-10-28 | Greene, Tweed Of Delaware, Inc. | Hermetic electrical connector |
| US7901247B2 (en) | 2009-06-10 | 2011-03-08 | Kemlon Products & Development Co., Ltd. | Electrical connectors and sensors for use in high temperature, high pressure oil and gas wells |
| US20190337836A1 (en) * | 2015-05-22 | 2019-11-07 | Axon Cable | Glass composition for micro-d connector sealing |
| EP3594191A1 (fr) * | 2018-07-10 | 2020-01-15 | Axon Cable | Verres pour connecteur hermetique |
-
2023
- 2023-03-29 FR FR2303007A patent/FR3147446A1/fr active Pending
-
2024
- 2024-03-28 CN CN202480022162.7A patent/CN120882671A/zh active Pending
- 2024-03-28 WO PCT/FR2024/050404 patent/WO2024200973A1/fr not_active Ceased
- 2024-03-28 EP EP24722053.6A patent/EP4688681A1/fr active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7364451B2 (en) | 2004-02-24 | 2008-04-29 | Ring John H | Hybrid glass-sealed electrical connectors |
| US7442081B2 (en) | 2004-02-27 | 2008-10-28 | Greene, Tweed Of Delaware, Inc. | Hermetic electrical connector |
| US7901247B2 (en) | 2009-06-10 | 2011-03-08 | Kemlon Products & Development Co., Ltd. | Electrical connectors and sensors for use in high temperature, high pressure oil and gas wells |
| US20190337836A1 (en) * | 2015-05-22 | 2019-11-07 | Axon Cable | Glass composition for micro-d connector sealing |
| EP3594191A1 (fr) * | 2018-07-10 | 2020-01-15 | Axon Cable | Verres pour connecteur hermetique |
Also Published As
| Publication number | Publication date |
|---|---|
| CN120882671A (zh) | 2025-10-31 |
| EP4688681A1 (fr) | 2026-02-11 |
| FR3147446A1 (fr) | 2024-10-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0562108B1 (fr) | Materiau multicouche pour revetement anti-erosion et anti-abrasion | |
| EP3297966B1 (fr) | Composition de verre pour le scellement de connecteur micro-d | |
| EP3594191B1 (fr) | Verres pour connecteur hermetique | |
| EP2401539B1 (fr) | Dispositif d'assemblage | |
| EP0043781B1 (fr) | Procédé pour la fabrication d'une couche composite résistant à la fois au grippage, à l'abrasion, à la corrosion et à la fatigue par contraintes alternées, et couche composite ainsi obtenue | |
| EP3875437B1 (fr) | Connecteur circulaire hermetique | |
| EP0509875A1 (fr) | Procédé pour le dépôt sur au moins une pièce, notamment une pièce métallique, d'une couche dure à base de pseudo carbone diamant ainsi que pièce revêtue d'une telle couche | |
| WO2024200973A1 (fr) | Traversée de cloison | |
| FR2714730A1 (fr) | Sonde à détecteur d'oxygène pour chaudière. | |
| FR2796654A1 (fr) | Alliage aluminium-titane a reflectivite speculaire elevee, revetements reflecteurs comprenant un tel alliage et miroirs et pieces comportant ce revetement | |
| WO2010097765A1 (fr) | Assemblage affleurant | |
| EP2647606B1 (fr) | Vitrage comprenant une couche a base d'oxyde de silicium | |
| EP3408242B1 (fr) | Article de douche, de baignoire ou de pare-baignoire | |
| EP1788110A1 (fr) | Revêtment à base d'argent resistant à la sulfuration, procédé de dépot et utilisation | |
| EP4276880B1 (fr) | Procédé de modification de l état de surface d'une pièce par bombardement ionique | |
| EP1614764B1 (fr) | Revêtement décoratif par déposition de couches alternées de nitrures | |
| EP4368589A1 (fr) | Verres pour connecteur hermetique miniature | |
| KR20110055729A (ko) | 주입된 산소화 기체를 함유하는 필름 및 이의 제조 방법 | |
| EP4294958A1 (fr) | Revêtement protecteur d'un substrat en alliage cuivreux et procédé correspondant | |
| EP4492158A1 (fr) | Procede de depot ameliore d'une ceramique | |
| WO2024223503A1 (fr) | Système et procédé pour le revêtement d'un substrat verrier | |
| CH719680A2 (fr) | Procédé de modification de l'état de surface d'une pièce par bombardement ionique. | |
| EP4127265A1 (fr) | Procédé de fabrication d'une pièce en métal résistante au feu titane par fabrication additive | |
| FR3017129A1 (fr) | Vitrage facile a nettoyer comprenant une couche externe a base d'oxyde d'etain et de zinc | |
| CH523207A (fr) | Pièce à surface vitreuse, vitrocristalline ou céramique, munie d'un dépôt métallique, et procédé pour sa fabrication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 24722053 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: CN2024800221627 Country of ref document: CN Ref document number: 202480022162.7 Country of ref document: CN |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2024722053 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWP | Wipo information: published in national office |
Ref document number: 202480022162.7 Country of ref document: CN |
|
| ENP | Entry into the national phase |
Ref document number: 2024722053 Country of ref document: EP Effective date: 20251029 |
|
| ENP | Entry into the national phase |
Ref document number: 2024722053 Country of ref document: EP Effective date: 20251029 |
|
| ENP | Entry into the national phase |
Ref document number: 2024722053 Country of ref document: EP Effective date: 20251029 |
|
| ENP | Entry into the national phase |
Ref document number: 2024722053 Country of ref document: EP Effective date: 20251029 |
|
| ENP | Entry into the national phase |
Ref document number: 2024722053 Country of ref document: EP Effective date: 20251029 |
|
| ENP | Entry into the national phase |
Ref document number: 2024722053 Country of ref document: EP Effective date: 20251029 |
|
| ENP | Entry into the national phase |
Ref document number: 2024722053 Country of ref document: EP Effective date: 20251029 |
|
| ENP | Entry into the national phase |
Ref document number: 2024722053 Country of ref document: EP Effective date: 20251029 |
|
| WWP | Wipo information: published in national office |
Ref document number: 2024722053 Country of ref document: EP |