EP4122302A1 - Dispositif pour guider une conduite à travers une paroi de manière étanche à la pression, et procédé de fabrication du dispositif - Google Patents

Dispositif pour guider une conduite à travers une paroi de manière étanche à la pression, et procédé de fabrication du dispositif

Info

Publication number
EP4122302A1
EP4122302A1 EP21777630.1A EP21777630A EP4122302A1 EP 4122302 A1 EP4122302 A1 EP 4122302A1 EP 21777630 A EP21777630 A EP 21777630A EP 4122302 A1 EP4122302 A1 EP 4122302A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
line
wall
pressure
jacket
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.)
Pending
Application number
EP21777630.1A
Other languages
German (de)
English (en)
Inventor
Stefan Stelzl
Axel Seikowsky
Christian Ecke
Thomas Wisspeintner
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.)
Micro Epsilon Messtechnik GmbH and Co KG
Original Assignee
Micro Epsilon Messtechnik GmbH and Co KG
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 Micro Epsilon Messtechnik GmbH and Co KG filed Critical Micro Epsilon Messtechnik GmbH and Co KG
Publication of EP4122302A1 publication Critical patent/EP4122302A1/fr
Pending 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
    • F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
    • F16L5/02—Sealing
    • F16L5/10—Sealing by using sealing rings or sleeves only
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/06—Hermetically-sealed casings
    • H05K5/069—Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/013—Sealing means for cable inlets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/06—Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint
    • H02G3/0616—Joints for connecting tubing to casing
    • H02G3/0625—Joints for connecting tubing to casing with means for preventing disengagement of conductors
    • H02G3/065—Joints for connecting tubing to casing with means for preventing disengagement of conductors with means biting into the conductor-insulation, e.g. teeth-like elements or gripping fingers

Definitions

  • the invention relates to a device for passing a line comprising a deformable casing through a passage in a wall in a pressure-tight manner, the wall separating a first pressure area from a second pressure area.
  • the pressure areas can have different pressures, for example atmospheric pressure on one side and negative or positive pressure on the other side.
  • high temperatures or very different temperatures can prevail on both sides.
  • wall is to be understood in the broadest sense. This can be a wall between two rooms or a wall as part of a housing. It is essential that this is a passage through a wall that separates different pressure areas from one another, with the passage of the line being understood as a weak point for isolating the two areas.
  • a sensor In industrial applications in measurement technology, there is often a requirement to operate different components of a measurement chain in different pressure ranges. For example, a sensor is often operated in a different ambient pressure range than the associated evaluation electronics. To do this, the control and signal lines between the sensor and the evaluation electronics must be routed via a bushing from one pressure area to the other pressure area.
  • pressure or vacuum bushings are common or known from practice.
  • the line In the case of feedthroughs for vacuum, the line is usually separated and then routed to the opposite side via glued, encapsulated or glass-enclosed pins.
  • the disadvantage of this type of implementation is the complex manufacturing and assembly process. At the point of separation, the ambient medium could also be pressed into the cable, eg between the inner conductor and the shield, or between the strands. If the pressure drops quickly, the pipe jacket could burst.
  • Pressure bushings are usually constructed in such a way that the entire line is routed through the opening with a cable gland with a steel conduit thread (PG screw connection) or similar, and then with an O-ring or similar on the jacket of the line and the opening sealed by screwing.
  • the disadvantage is their complex and large-volume construction. PG glands require a lot of space, are heavy and consist of several parts.
  • the present invention is therefore based on the object of designing and developing a device of the generic type in such a way that the aforementioned disadvantages are at least largely eliminated.
  • the device should be suitable for both pressure and vacuum applications.
  • the device should not be damaged in the area of the leadthrough, even over a longer period of use.
  • tightness should be ensured over a wide temperature range, for example over a temperature range of about -20°C to +200°C.
  • a corresponding method for producing such a device is also to be specified.
  • the above object is achieved by the features of claim 1 in relation to the device according to the invention. Accordingly, it is a device for the pressure-tight passage of a line comprising a deformable jacket through a passage in a wall which separates a first pressure area from a second pressure area.
  • the device comprises a sleeve surrounding the line in the area of the bushing, which has at least two annular constrictions, notches, grooves or the like that are spaced apart from one another and are formed by forming Sleeve-acting integral ring seal is upset, the sleeve being pressure-tightly connected or connectable to the wall around the passage, at least from one side.
  • a seal between the line and the sleeve is produced in situ, namely by simulating the functional principle of a sealing ring, which is produced from the jacket of the line by means of a circumferential constriction, notch, groove or the like in a metal sleeve, with adjacent notches containing the material of the Coat to upset each other, creating a kind of integral sealing ring is formed by material elevation.
  • a more or less raised “sealing ring” is created as an integral part of the jacket material.
  • the term "line” is also to be understood in the broadest sense.
  • This can be an electrical line, for example.
  • the line can also be an optical line, for example a fiber optic cable. It is also conceivable that the line is designed as a fluid line, for example in the sense of a pneumatic or hydraulic line. It is essential for the cable that there is a plastically deformable sheath, which does not necessarily have to be elastic. Cables with a sheath made of PVC, PUR, FKM (FFKM), FPM (FFPM), PTFE, ductile metal, etc. are particularly suitable.
  • the sleeve through which the line is routed is preferably made of ductile metal, so that it can be shaped using a suitable tool that acts on the jacket material.
  • the material of the sleeve can be any malleable metal.
  • the material of the sleeve is approximately matched to the material of the wall with regard to the coefficient of thermal expansion, so that no stress cracks occur during operation, particularly with temperature fluctuations, due to different coefficients of thermal expansion in the area of a possible connection.
  • At least one further ring-shaped constriction is provided, so that a total of three constrictions are formed. This means that two ring seals are formed between the constrictions by material displacement/upsetting of the jacket material.
  • the constrictions can be arranged equidistantly from one another and have approximately the same size. It is also conceivable to provide a different distance between the constrictions and thus also between the ring seals, depending on requirements.
  • the sleeve provided for deformation can be of different lengths across the line.
  • a support sleeve is provided directly or indirectly under the jacket, which sleeve serves as an abutment when the sleeve is deformed.
  • the support sleeve can be drawn into the line under the jacket.
  • the sleeve is basically to be understood as an independent component and can be connected to the wall as required.
  • the sleeve is an integral part of the wall or of a housing enclosing the wall, so that there is no sealing problem between the sleeve and the wall. So the sleeve could be an integral part of a cylindrical sensor housing, which is machined mechanically in such a way that the sleeve in question is worked out at one end, for example by turning, eroding, etc.
  • the sleeve can be glued or welded to the wall from one side.
  • the sleeve is an integral part of a flange that can be connected to the wall and that can be used on different walls. What is essential here is a sealing connection between a flange surface of the flange and a contact surface of the wall, for which purpose conventional O-rings or flat seals can be used.
  • the wall with the passage can be part of the housing of an apparatus, for example an electrical device, which can be a measuring device, in particular a sensor.
  • an electrical device which can be a measuring device, in particular a sensor.
  • the device according to the invention is used for sealing between the measuring side of a sensor and the connection accommodated in a housing, optionally with electronics.
  • the line is pulled into a sleeve or the line is covered with a tight-fitting sleeve.
  • a constriction or notch is made in the metal sleeve.
  • the material of the outer shell is squeezed in the radial direction. Due to the internal structure of the line, the material cannot deviate inwards, which means that it is partially pushed away axially from the constriction. If the internal structure of the cable is too flexible (e.g. coax or triax cables with a foamed dielectric), it can be a support sleeve can be pushed between the jacket and the inner structure of the cable.
  • the constriction is carried out with a suitable tool or device. It must be carried out all around so that the material of the jacket is deformed over the entire circumference. A simple crimp is not sufficient here.
  • a squeezing device could be used, for example a toggle lever press with circulating pressing pieces that form circular segments in order to produce a circulating constriction when pressed together.
  • a kneading converter that produces the constriction by moving a knurling head around is particularly suitable.
  • a second constriction is introduced at a specific distance from the first constriction.
  • the material of the outer jacket is also squeezed radially here and partially pushed away axially from the constriction.
  • the material of the outer casing is quasi compressed between the two constrictions. This creates an area between the two constrictions where the material of the jacket is thickened and compressed: A sealing area is created between the constrictions, which is modeled on a sealing ring, such as an O-ring.
  • the two steps can also be carried out simultaneously with a suitable device. If pressure now comes from the surrounding medium on the pressure side onto the simulated O-ring, this is further compressed and its sealing effect is promoted.
  • the shape, depth, spacing and characteristics of the constrictions determine the shape of the replicated O-ring.
  • the constrictions are dimensioned in such a way that the region of the deformable sleeve between them has almost the shape of an arc of a circle.
  • the resulting pressure forces are absorbed particularly well, analogously to the O-ring. This achieves a high degree of tightness when pressure is applied over a wide temperature range, for example from -20°C to +200°C, since the overpressure supports the sealing effect at any temperature. through the sym-
  • the metric design of the constrictions enables the sealing effect to be in two directions, which also allows use in the event of pressure changes.
  • two or more sealing areas can also be arranged one behind the other.
  • the first pressure range can be normal ambient pressure
  • the second pressure range can be either a vacuum or an overpressure.
  • the process is particularly suitable for high pressures. Any desired combination of first and second pressure area is conceivable.
  • the method can be applied not only to electrical lines, but also to optical lines (fiber optic cables), pneumatic or hydraulic lines if these lines are routed from a first pressure area to a second pressure area.
  • FIG. 1 shows a schematic view of a device for passing a line comprising a deformable jacket in a pressure-tight manner through a passage in a wall, which is not shown in the figure, the line being fed through a sleeve, before the sleeve is deformed
  • FIG. 2 shows a schematic view of the object from FIG. 1 after the sleeve has been formed
  • FIG. 3 shows a schematic view of the device according to the invention using the example of a coaxial line with a retracted support sleeve
  • FIG. 4 shows a schematic view of a further exemplary embodiment of a device according to the invention, the sleeve being part of a sensor housing,
  • FIG. 5 shows a schematic view of another embodiment of a device according to the invention, the sleeve being part of a flange for direct connection to the wall, and
  • FIG. 6 shows the object from FIG. 5 in a schematic, perspective view.
  • Fig. 1 shows the device 1 for leading through an electrical line 2, which is guided through a metal sleeve 3, before forming.
  • a first notch 4 compresses the casing 5 in the radial direction 6 , as a result of which it deflects in the axial direction 7 .
  • the second notch 8 behind it also presses the jacket together radially, as a result of which the jacket also deflects axially.
  • the jacket is compressed and compressed, resulting in a thickening.
  • This thickening forms a sealing area 9 which is modeled after a sealing ring, for example an O-ring.
  • FIG. 3 shows a situation in which this is not the case.
  • the coaxial line 2 consists of a dielectric 10 made of foamed material between the inner conductor 11 and the braided shield 12.
  • the foamed dielectric 10 can at best absorb small forces, so that when the notches 4, 8 are formed, the dielectric 10 would be crushed, but not the jacket 5 would be deformed.
  • a support sleeve 13 can be introduced between the jacket 5 and the internal structure, for example above or below the braided shield 12, which then absorbs the radial forces during the forming process.
  • FIG. 4 shows the use of such a feedthrough 1 using the example of a sensor 14.
  • the sensor 14 is located in a first area 15 subjected to high pressure and possibly high temperature.
  • the sensor 14 itself is sealed and resistant to pressure and temperature.
  • Inside the sensor 14 there is normal pressure, which forms a second pressure area 16 .
  • the bushing 1 is sealed in accordance with the teaching of the invention.
  • a sealing area 9 is modeled on an O-ring, which reliably prevents the medium from penetrating into the second pressure area 16, i.e. into the interior of the sensor 14.
  • FIG. 5 shows the use of such a passage 1 through a wall 17 between a first pressure area 15 and a second pressure area 16.
  • a pressure flange 19 is screwed to an opening 18 in the wall 17 and sealed with an O-ring 20 in a known manner.
  • the line 2 extends through the passage 1 in the pressure flange 19.
  • a metal sleeve 3 is attached to the pressure flange 19 and forms the seal according to the invention by means of two indentations 4, 8.
  • Fig. 6 shows the pressure flange 19 in a perspective oblique view with the line 2 and the notches 4, 8.
  • the exemplary embodiments discussed above all relate to the passage of electrical lines. Instead of the electrical lines, any lines, in particular optical lines, hydraulic lines or pneumatic lines, can be fed through. It is essential that the line includes a deformable casing, so that an integral ring seal can be produced by forming.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Measuring Fluid Pressure (AREA)
  • Diaphragms And Bellows (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Cable Accessories (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

L'invention concerne un dispositif pour guider une conduite comprenant une enveloppe déformable à travers un passage dans une paroi de manière étanche à la pression, ladite paroi séparant une première zone de pression d'une deuxième zone de pression. Le dispositif comprend un manchon qui entoure la conduite dans la région où la conduite est guidée à travers la paroi et comporte au moins deux étranglements, encoches, rainures ou similaires annulaires mutuellement espacés, qui sont produits par déformation et entre lesquels le matériau de l'enveloppe est comprimé par la déformation de manière à former un joint annulaire intégral qui agit entre l'enveloppe et le manchon, le manchon étant relié ou pouvant être relié à la paroi de manière étanche à la pression autour du passage au moins depuis un côté. L'invention concerne en outre un procédé de fabrication du dispositif.
EP21777630.1A 2020-09-24 2021-07-16 Dispositif pour guider une conduite à travers une paroi de manière étanche à la pression, et procédé de fabrication du dispositif Pending EP4122302A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102020212059 2020-09-24
DE102020212608.9A DE102020212608A1 (de) 2020-09-24 2020-10-06 Vorrichtung zum druckdichten Durchführen einer Leitung durch eine Wand und Verfahren zur Herstellung der Vorrichtung
PCT/DE2021/200096 WO2022063364A1 (fr) 2020-09-24 2021-07-16 Dispositif pour guider une conduite à travers une paroi de manière étanche à la pression, et procédé de fabrication du dispositif

Publications (1)

Publication Number Publication Date
EP4122302A1 true EP4122302A1 (fr) 2023-01-25

Family

ID=80473930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21777630.1A Pending EP4122302A1 (fr) 2020-09-24 2021-07-16 Dispositif pour guider une conduite à travers une paroi de manière étanche à la pression, et procédé de fabrication du dispositif

Country Status (6)

Country Link
US (1) US20230366489A1 (fr)
EP (1) EP4122302A1 (fr)
JP (1) JP2023543551A (fr)
CN (1) CN116195152A (fr)
DE (1) DE102020212608A1 (fr)
WO (1) WO2022063364A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021211205A1 (de) 2021-10-05 2023-04-06 Vitesco Technologies GmbH Elektrische Durchführung und Verfahren zur Herstellung dieser

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2432428A1 (de) * 1974-07-04 1976-01-22 Siemens Ag Verkappung fuer vieladrige elektrische kabel
DD242504A1 (de) 1985-11-01 1987-01-28 Pumpen & Verdichter Veb K Kabeldurchfuehrung
DE102005056023B3 (de) * 2005-11-24 2007-06-21 Eaton Fluid Power Gmbh Wellrohrschlaucharmatur und Anschlussverfahren
DE102006034101A1 (de) * 2006-07-20 2008-02-07 VETEC GmbH Verbindungstechnologie für Versorgungssysteme Hülse und Kombination von Hülse mit Presswerkzeug

Also Published As

Publication number Publication date
JP2023543551A (ja) 2023-10-17
WO2022063364A1 (fr) 2022-03-31
US20230366489A1 (en) 2023-11-16
DE102020212608A1 (de) 2022-03-24
CN116195152A (zh) 2023-05-30

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