EP0529419A2 - Système de conduction à tube capillaire ainsi que la fabrication et dispositif de fabrication d'un système de conduction à tube capillaire - Google Patents

Système de conduction à tube capillaire ainsi que la fabrication et dispositif de fabrication d'un système de conduction à tube capillaire Download PDF

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Publication number
EP0529419A2
EP0529419A2 EP92113781A EP92113781A EP0529419A2 EP 0529419 A2 EP0529419 A2 EP 0529419A2 EP 92113781 A EP92113781 A EP 92113781A EP 92113781 A EP92113781 A EP 92113781A EP 0529419 A2 EP0529419 A2 EP 0529419A2
Authority
EP
European Patent Office
Prior art keywords
connection
capillary tube
section
essentially
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.)
Granted
Application number
EP92113781A
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German (de)
English (en)
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EP0529419A3 (en
EP0529419B1 (fr
Inventor
Hajo Lindner
Josef Zwickl
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Gerate Blanc und Fischer 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 EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Publication of EP0529419A2 publication Critical patent/EP0529419A2/fr
Publication of EP0529419A3 publication Critical patent/EP0529419A3/de
Application granted granted Critical
Publication of EP0529419B1 publication Critical patent/EP0529419B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/30—Means for transmitting pressure to pressure-responsive operating part, e.g. by capsule and capillary tube

Definitions

  • the invention relates to a line system and a method and / or a device for producing such a system, which in particular has a capillary tube and components or assemblies connected to it as a fluid-conducting line section, the respective connection according to the invention being hermetically sealed, but in its Area the line system can not be an interrupting connection point.
  • Such systems are useful for. B. as a hydraulic control element in manually adjustable regulating or control or switching devices for electrical or other heating devices, such as electric hot plates, oven heating, water heaters and. Like. Used.
  • the expansion fluid which is enclosed in a pressure-tight manner to the outside, fills the interconnected rooms completely and gas-free.
  • a space at one end of the capillary tube that is enlarged compared to the inner cross section of the capillary tube can be separated by the separate e.g. B. tubular jacket of a temperature sensor, while a corresponding, but expediently smaller in volume is formed at the other end of the capillary tube by a housing that a movable depending on changes in volume of this space actuator for at least one contact, a mechanical actuator and / or other.
  • the capillary tube can have a length of at least half a meter or a meter or more than two meters, can be connected to another capillary tube section via at least one branch piece and is of the order of magnitude due to its flexibility, resilient properties, metallic nature, and its small outside diameter of one or only a few millimeters and its smooth surface during the manufacture of the system and its assembly very difficult to handle.
  • Some parts e.g. B. a tubular temperature sensor, could also be molded in one piece from the capillary tube, but then the production of differently designed combinations of capillary tube and sensor is difficult because one component cannot be optionally connected to different other components.
  • solder the assembled components in a pass through a soldering furnace or by means of high-frequency heating; however, all components which are to be connected to one another beforehand in accordance with the assembly sequence must be completely exposed to relatively high heating, which, for. B. for protective tubes, springs and. The like. Is not cheap because their material properties or characteristics change under heating. It has also been shown that the soldering leads to embrittlement of the material of the capillary tube at the joints.
  • the capillary tube If the capillary tube is connected directly to the actuator, it performs countless micro-movements due to the operating stroke of the actuator can lead to permanent fracture of the capillary tube in particular if it is brittle in this area due to the production of the joint. This can be counteracted by a curved section of the capillary tube adjoining this joint, but this curved section increases the overall depth of the associated unit, eg. B. the switching device.
  • the curvature of the capillary tube can only begin after the solder material, which crawls through the adhesive surface during the liquid state from the mentioned outer end face along the outer circumference of the capillary tube over, for example, 1 to 2 millimeters in length and, after cooling, a corresponding, intimately connected to the capillary tube Stiffening envelope forms.
  • the soldering processes mentioned are also problematic from an ecological and occupational medical point of view, because a high expenditure of energy is required and damage to health can only be counteracted by complex fresh ventilation of the work rooms.
  • the invention is furthermore based on the object of creating a system, a method and a device of the type mentioned, by means of which disadvantages of known arrangements or described disadvantages are avoided and which in particular ensure a substantially increased fatigue strength of the joints.
  • connection point in particular by location within the entry point of the capillary tube into the connection piece, lies in the region of an end face of the capillary tube or the like or is associated with an increased corrosion protection.
  • the joint or the jointing material subjected to a shaping process is expedient for the most part or even completely at an externally sealed point, so that it is e.g. B. not with the air in the atmosphere Can come into contact.
  • the joining material may be a separate, added material, but it is preferably molded out of the capillary tube and / or the connector, e.g. B. by melting under welding heat and / or by a squeezing process in which the two materials to be joined together can also be cold welded together.
  • Adhesive plastic materials are also conceivable as added material, which may solidify after the connection has been made. If the largest part of the volume of the connecting material lies at a distance within the entry point or the outer end face of the mechanically essentially, in particular radially, rigidly receiving connecting piece of the associated section of the capillary tube and not within a cover which is slid on or surrounds this section at a radial distance, then the Junction in a simple manner similar to the fluid filling of the system to the outside essentially hermetically sealed.
  • a very good securing of the capillary tube at least in an axial direction, namely against pulling out of the connector even before the final connection is made, is, for. B. to achieve by a positive engagement of the capillary tube in a recess inside the connector.
  • a short section lying at a short distance immediately adjacent to the end face of the capillary tube or enclosing it can be widened, so that the connecting piece can initially still be displaced relative to the capillary tube, albeit radially essentially without play, but cannot be pulled off via this end .
  • the part of the tubular jacket which is non-contact with respect to the connecting piece and / or the largest part of the section of the tubular jacket located in the connecting piece can be made of connecting material completely free and therefore be metallic bright from the pipe material.
  • the connector can be connected to the connection section of a z. B. be subjected to squeezing deformation.
  • the connector which is preferably not in one piece with the thin-walled, for. B. formed from sheet metal vessel jacket of the associated connection unit or is formed out of this and has thicker material cross sections compared to this, forms a connector for connection to an associated portion of the vessel jacket.
  • the connecting element expediently engages in an associated section of the vessel shell or a further intermediate piece fastened to the vessel shell, which can be stop-limited in the insertion direction. After the connection piece has been inserted, it can be fixed in a sealed manner by establishing a connection of the described or similar type. With a connection of this type, the further intermediate piece can optionally also be fastened to the vessel jacket.
  • connection section in the case of a sleeve-shaped connection section of the pressure vessel, this connection section also passes axially adjacent and at a distance from the joint with an essentially constant width, so that, for. B. a tubular pressure vessel starting from the connection section can have constant cross-sections at least over part of its length, the length of which is an integral multiple of the pipe width or more than a quarter or half of the total length and which is closed up to a short and narrowed by Connection section distant end section can range.
  • the above-mentioned object can also be achieved in itself in that the capillary tube for axial alignment by shifting relative to the connection section of the connection unit, a further intermediate piece or the like.
  • At least one dimension reference surface protruding over its outer circumference, e.g. B. has an axial stop through which the axial position of the capillary tube relative to the receiving connecting part can be precisely determined. In the case of a closed hydraulic system, this axial position is important for its adjustment, because it influences the receiving volume of the system. If the capillary tube is displaceably guided relative to the connecting part before reaching the stop position, simple assembly results.
  • the measurement reference surface can be formed in a simple manner by a front and / or rear end face of the intermediate piece, which is connected directly to the capillary tube before being attached to the connection unit. This intermediate piece also shields the associated connection point from the outside.
  • the stated object is to be achieved in itself in that an approximately quarter-circularly curved section of the capillary tube, which connects to the connection unit, with the curvature already within a component connected to or formed by the connection part of this connection unit and not only in the outer axial Distance begins therefrom, so that at least part of this curved section is already within at least one intermediate piece or a jacket of the pressure vessel.
  • the overall height of the associated connection unit, in particular of the device receiving the actuator can be substantially reduced in the direction of the connection axis of the capillary tube.
  • connection section of the capillary tube is fixed directly with a connection and then the first-mentioned connection is brought into a protected position by establishing at least one further connection, both connections following Their manufacture is expediently completely rigid with respect to one another and / or the respective connection in the longitudinal direction of the tube has an extent which is at most approximately of the order of magnitude of the wall thickness of the capillary tube or the vessel jacket.
  • the design according to the invention is particularly suitable for switching devices or the like according to DE-OS 38 44 472, to which reference is made to include their features and effects in the present invention.
  • a membrane assembly that contains the expansion socket, the connecting nipple for the capillary tube attached to one of its end faces or a pressure piece for the adjusting spindle attached to the end face facing away from it, the resilient switching arm and, on this, the actuator for the switching contact, which consists of electrically insulating material , is pushed with the connecting nipple onto the other intermediate piece of the capillary tube and the connecting nipple with this intermediate piece through a fixed laser beam welded.
  • the actuator for the switching contact which consists of electrically insulating material
  • this module is also attached axially to the connecting nipple or the intermediate piece and then fastened by welding from the end face of the associated can end wall of the expansion socket.
  • the expansion box is expediently not yet assembled and closed by welding the overlapping edges of its can parts, but rather only the one can part is attached to the capillary tube, after which the can is closed with the other can part and sealed by welding the edges . All welds can optically very well z. B. be checked for leaks.
  • the steps of the invention can be carried out in an automatic production, for. B. be carried out on a transfer line, in particular when the longest capillary tube section lying between the ends of the capillary tube is secured in a memory during manufacture and can therefore not perform any uncontrolled or only insignificant relative movements relative to the ends.
  • a device for producing a capillary tube system expediently has means for securing the position of essentially the entire capillary tube, tensioning devices being preferably provided for securing the ends of the capillary tube in such a way that these ends protrude freely over a length sufficient for all work. Since the capillary tube is made of resiliently elastic material, the freely projecting ends can be deflected in a simple manner in a resilient manner relative to the device and thereby in the respective work station Transfer line to be precisely aligned to the associated tool units.
  • the system 1 has, in addition to a capillary tube 2 which is one-piece between its ends, two connection units 4, 6 connected to these ends via tube connections 3, 5, namely a membrane socket and a temperature tube sensor.
  • Each end of the capillary tube 2 forms a z. B. about 1 mm several times longer, connecting to the respective end face connecting section 7, the z. B. can be regarded as reaching there, up to which it with its outer circumference in immediate as well as over the circumference and / or its length of continuous continuous contact with the respective connection unit 4 or 5 is.
  • connection section 7 The end section of the capillary tube 2 is encased beyond this connection section 7 over a length, but with at least a small radial distance, which may be of the order of magnitude of the connection section 7 or, on the other hand, is shorter. This section extends to a connection surface 8 or 9 at which the capillary tube enters the casing from the outside.
  • connection section 7 The said contact-free and contacting sheathing of the connection section 7 is formed by a sleeve-shaped or sleeve-shaped connecting piece 10, the continuous outer cylindrical circumference of which has a diameter that is approximately equal to the axial extent of the connecting piece. Furthermore, the connecting piece 10 is formed symmetrically to the middle of its length, that is to say can be used as desired, and in addition all connecting pieces 10 of the system 1 are of identical design, so that any of the connecting units 4, 6 to be connected can be attached to both ends of the capillary tube 2.
  • connection units 4, 6 expediently forms a pressure vessel with a one-part or multi-part vessel jacket 11 or 12.
  • the vessel jacket 11 of the connection unit 4 can, for. B. form an approximately annular disk-shaped flat connection wall 13 for the connection section 7, while the vessel jacket 12 of the connection unit 6 forms a tubular or sleeve-shaped connection wall 14, which can be formed by a continuous, no further pre-processing continued continuation of the vessel jacket 12.
  • the connecting piece 10 is not attached directly to the vessel jacket 11, but rather via a sleeve-shaped or flange-shaped intermediate piece 15, although here too, as in the case the connector 6, the connector 10 could be attached directly to the connecting wall 14.
  • connection sections 7 of the capillary tube 2 are also fastened in the same way to the associated connecting piece 10, so that after the capillary tube 2 has been equipped with the two connecting pieces 10, these can optionally be used for both connecting units 4, 6.
  • the connecting piece 10 has a passage opening 16 lying in its central axis, which in the distance between the plane-parallel end faces of the connecting piece 10 as z.
  • cylindrical fitting bore 17 is formed, which is closely adapted to the outer cross section of the tubular jacket of the capillary tube 2 and can therefore form a substantially radial play-free or tight sliding guide for the connecting section 7.
  • the fitting hole 17 merges directly into the narrowest end of an acute-angled conical extension 18, 19, which can each be slightly shorter than the fitting holes 17.
  • the connecting section 7 is provided with a widening 22 which adjoins its end face or is only a smaller distance apart from it, which in the illustrated embodiment has the same cone angle as the associated widening 18 is conical frustoconical, but in relation to its length and its smallest or largest Width is much shorter; the length of the widening 22 may e.g. B. are in the order of half of the outer diameter of the capillary tube 2.
  • the widening 22 is expediently produced after plugging the connecting piece 10 onto the connecting section 7 with a mandrel under plastic deformation, the widening 18 and, if appropriate, the fitting bore 17 being able to form the die for this widening process, so that the Pipe jacket is applied tightly and over the entire area under great pressure force radially against the enlargement 18 or the fitting bore 17 and thereby already a high level of tightness, e.g. B. by cold welding of the surfaces pressed against each other with structural compression of both the material of the connecting portion 7 and the connecting piece 10.
  • connection 20 is expediently provided, which is essentially ring-shaped on the end face 23 of the widening 22 and at a distance between the ends the extension 18 connects to the jacket and can have an axial extent which is approximately in the order of the thickness of the tubular jacket 21, the z. B. is about 1/4 mm, so that the axial and radial extent of this connection 20 are approximately the same order of magnitude or are approximately the same size.
  • This connection 20 which is also produced from the end face 23, is formed by a weld seam and does not need to protrude inward beyond the inner circumference of the widening 22, it extends from the passage surface 24 through the end face of the connecting piece facing away from the connection surface 8 10 is formed, has an axial distance approximately in the order of magnitude of the thickness of the tubular jacket 21, so that the passage surface 24 is suitable as a reference or contact surface for the struck system on the outside of the connecting wall 13 even if there is no direct connection here , such as a welded connection, is provided.
  • connection section lies at a distance between the ends of the tubular jacket 2, it can be formed by one or more openings in the tubular jacket 21 which then each form a section of the end face mentioned, which is also suitable for producing a weld seam, so that in this case the capillary tube could protrude over both ends of the connecting piece.
  • the respective end face or the connection surface 8 and the passage surface 24 is narrowly ring-shaped with a ring width in the order of the thickness of the tube jacket 21 and on the outer circumference of the cylindrical outer surface 25 of the connecting piece 10.
  • the extension 19 forms a kink protection 26 for the section of the capillary tube 2 that is exposed to the fitting bore 17, since the extension 19 can serve as a stop for the outer circumference of the capillary tube 2. Furthermore, the extension 19 forms a receiving space for a z. B.
  • connection unit 4 or 6 delimits a fluid space 28 or 29, to which the associated connection section 7 is connected in a blunt manner at the end instead of directly via the connecting piece 10 and possibly a further intermediate piece 15.
  • the fluid space 28 of the connection unit 4 is essentially a very flat disk-shaped space which is axially parallel or axially parallel to the associated connection section 7, whereas the fluid space 29, which is much larger in comparison, can be an elongated, approximately cylindrical space.
  • the connecting piece 10 is essentially completely sunk into a bore of the intermediate piece 15 so that the passage surface 24 lies approximately in the plane of the associated end face of the intermediate piece 15.
  • the intermediate piece 10 is connected in a rigid manner and sealed to the intermediate piece 15 in the region of its other end, which is located at the connection surface 8, via a single connection 30.
  • connection 30 can likewise be formed by an annular weld seam of approximately the same cross section, which expediently connects to the outer surface 25 and to the associated end face of the intermediate piece 15 and, if appropriate, approximately to the connection surface 8.
  • the connecting piece 10 can be displaced in the bore of the intermediate piece 15 essentially without radial play.
  • the intermediate piece 15 is fastened to the connection wall 13 with a connection 38, this connection 38 being a seam as described with reference to the other connections and having a radial distance outside the outer surface 25 or the bore of the intermediate piece 15 lies.
  • the end face of the intermediate piece is expediently flat on the outside of the connecting wall 13.
  • the connecting piece 10 can then be inserted into its bore until it axially strikes with its end face, eg. B. directly on the outside of the connection wall 13.
  • the vessel jacket 11 of the connection unit 4 can be closed before connection to the capillary tube 2 z. B. be produced in that two cap-shaped vessel parts 34, 35 inserted into each other and at their overlapping jacket edges together by welding or the like. So are connected so that they delimit the fluid chamber 28 between their annularly corrugated end wall caps.
  • connection wall 13 expediently has a connection opening 32 lying approximately coaxially with the connection section 7, through which the connection section 7 communicates with the fluid chamber 28 and whose outermost limitation is approximately the same as the greatest width of the Connection section 7 can be.
  • a flat disk-shaped cavity 33 is delimited within the connecting piece 10 between the connecting wall 13 and the end face 23, within which the connection 20 thus flushed by the fluid lies completely sealed against air, since this cavity 33 is hermetically sealed to the outside by the connection 38 is sealed.
  • connection unit 6 instead of an end connection, an annular circumferential connection 31 is provided directly between the outer surface 25 of the connecting piece 10 and the jacket of the connecting wall 14 directly adjacent to its end face, so that the connecting piece 10 is free over part of its length over this end face protrudes.
  • the inner circumference of the connecting wall 14 forms a sliding seat for the connecting piece 10, which is essentially free of radial play and therefore already in the manner of a piston which is displaceable in a cylinder, which in this case is stop-free is inserted into the connection unit 5, so that the total volume of the system provided for receiving the fluid can be precisely adjusted by moving the connecting piece 10 more or less deeply.
  • the wall thickness of the connecting piece 10 is substantially greater than that of the connecting wall 14, so that the connection 31 can be produced from the outside without the risk of damage.
  • a support body 37 is fastened on its outer end face approximately coaxially with the associated connecting section 7, the end face of which, for. B. is supported on an adjusting spindle.
  • the connector 15 also serves as a nipple, with which a switching arm 39, for. B.
  • a leg of an angled flat spring arm is attached so that the lifting movements are transmitted to the free end of this switching arm 39, which can act on an insulating body on a movable switching contact.
  • the switching arm 39 can e.g. B. on a reduced in the outer width portion of the intermediate piece 15 or the associated connector, which can also be formed in one piece with the intermediate piece 15.
  • the switching arm 39 is secured in position by clawing in relation to the outer circumference of the connecting piece 15 in an axial region which approximately coincides with the fitting bore 17.
  • the respective connector 10 expediently has at least one dimension reference surface, which can be formed by the passage surface 24 in the case of connection to the connection unit 4 and by the connection surface 9 in the case of connection to the connection unit 6.
  • the adjustment can be carried out on the basis of the position of this reference surface in relation to the remaining connection unit 4, 6.
  • the curved section 27 expediently merges directly tangentially into a ring section bent out of the capillary tube 2, which is approximately at right angles to the axis of the associated connecting section 7 and serves as a resilient compensating section.
  • a hose made of a heat-resistant fabric or the like, e.g. B. made of silicone, fiberglass, or the like.
  • the z. B. connects approximately to the connector 10 of the connection unit 4, but neither with the connector 10 nor with the associated section of the capillary tube 2 directly positively or adhesively connected, but z. B. is only determined by curvatures of this section of the capillary tube.
  • Immediate adhesive connections or connections made by melting processes, such as soldering, are provided in the area of the connecting section 7 at most up to the transition between the fitting bore 7 and the extension 19, but preferably only in the area of the extension 18, so that the material of the connecting section 7 through the thermal load during the production of the connection is only claimed in a very limited axial range and no portions of the connecting material can be provided where the tubular jacket 21 is exposed on both sides of the connection surface 8 or 9 relative to the connecting piece 10.
  • laser welding plasma welding is also conceivable for establishing the respective connection.
  • the connecting piece 10 and / or the intermediate piece 15 of the pipe connection 3 can also have a rivet and / or a fusion connection, such as a welded connection, with the switching arm 39, for. B. be connected so that a non-destructive release is no longer possible.
  • the connecting piece 10 or the intermediate piece 15 can be formed directly into the rivet head or into a bore of the switching arm 39, which is closely matched to its outer circumference. B. intervene in such a way that the materials of the two components to be joined together are fused together in a ring shape along the circumference.
  • a soldered connection is also conceivable.
  • the connecting piece 10a engages over the component to be connected to it, e.g. B. the intermediate piece 15a, cap-shaped on the outer circumference.
  • the large surface areas of the two components lying against one another are preferably frustoconical at an acute angle.
  • the extension 18a of the connecting piece 10a can be axially extended with a constant cone angle to such an extent that it forms a frustoconical receptacle for the engagement of a frustoconical section at the outer end of the intermediate piece 15a at the gap distance from the end face 23a or the connection 20a.
  • This receptacle can merge into the outer surface 25a in a sharp-edged, acute-angled manner, which at least on the end edge 24a thus formed advantageously has the same outer width as the further end of the frustoconical outer surface of the intermediate piece 15a.
  • the outer surface in the area of the joint and the connection 30a can be provided as a circumferential groove very close to the end edge 24a, in the area of which the material thickness of the connecting piece 10a is significantly smaller than that of the intermediate piece 15a.
  • the widening 22a of the capillary tube 2a lies axially adjacent to the associated end face of the connecting piece 15a, which is provided with a through bore 41 extending from this end face for the fluid connection with the connection unit 4a.
  • the connecting piece 10a forms a continuation of the outer surface of the intermediate piece 15a, so that the switching arm can optionally be fastened to the outer circumference of the connecting piece 10a and / or the intermediate piece 15a and the overall body composed of these two components compared to the illustration according to FIG. 2 can be significantly shortened.
  • the extensions 18a, 19a of the connecting piece 10a are designed differently with regard to their axial extension as well as their width and profile.
  • the extension 19a is in this case formed by an approximately quarter-circle rounded ring zone, which is shorter and on average less wide than the extension 18a or the extension 22a. Otherwise, the same reference numerals as in FIG. 1 are used in FIGS. 2 and 3 for corresponding parts, but with the index "a” or "b", which is why all parts of the description apply mutatis mutandis to all embodiments.
  • the connecting piece 10b is designed as a collar sleeve, which fits tightly into a corresponding receiving bore 41b of the intermediate piece 15b and with a abuts radially projecting annular collar on the outer end face of the intermediate piece 15b.
  • the axial position of the connecting piece 10b relative to the intermediate piece 15b is also precisely defined here, the connecting piece 10b projecting away from the inner fastening end face of the intermediate piece 15b, so that the connecting piece 10b in this case is not on the connecting wall of the associated connecting unit, not shown in more detail 4 strikes, but, like the connection section of the capillary tube, not shown in detail, lies at a distance outside the connection wall of this connection unit.
  • connection 30b is provided between the outer periphery of the collar of the connecting piece 10b and the outer end face of the intermediate piece 15b.
  • the connections 30b, 42 can also be formed by a single seam. All of the illustrated and described training can also in a single embodiment, for. B. can be provided if a connection unit has more than one connecting piece or intermediate piece and these are attached according to the described embodiments with the connections.
  • a device 40 is shown in simplified form in FIG. 4, with which the capillary tube can be connected essentially to all components to be attached or connected to it.
  • the capillary tube 2 Before inserting the capillary tube 2 into the device 40, it is wound in the section between its connecting sections 7 to form such a helical section 43, as will later be used for transport and the assembly of the system is required so that this section 43 can remain essentially unchanged after the connections have been made until assembly in a device.
  • the winding is carried out in such a way that the two connection sections 7 project substantially opposite one another in the same direction, with section 43 going tangentially.
  • a tube 44 or the like can be pushed onto the capillary tube 2 before it is inserted, which tube then lies in the region of the section 43 and / or at least one rectilinear section of the capillary tube 2.
  • the device 40 has a workpiece carrier 45 with two clamping devices 46, which forms a self-contained transport unit in the manner of a workpiece carriage with the clamped workpiece or capillary tube 2.
  • the two clamping devices 46 which are located at opposite ends of the workpiece carrier 45 and of which the right one is shown in FIG. 4, but the left one is shown closed, each serve for clamping one end of the capillary tube 2 in such a way that the connecting sections 7 are connected to one another end faces of the workpiece carrier 45 or the device 40 which are turned away protrude approximately coaxially by more than the length of the connecting pieces 10 and thereby form freely projecting spring arms which can be moved slightly relative to the workpiece carrier 45 in order to align the respective work station.
  • Both clamping devices 46 can be opened and closed independently of one another, are of identical design and each have a prism-shaped clamping receptacle 47 for the associated end section of the capillary tube 2.
  • the end section can be tensioned with a tensioning member 48 which is pivotally mounted with an actuating member 49 about an axis approximately parallel to the end section.
  • the Actuator 49 designed in the manner of a freely protruding arm can be actuated mechanically or by a motor in addition to manually by a corresponding working element of a tensioning station, the actuating element 49 being brought into the range of movement of this working element in this station and out of the movement path after tensioning or relaxing is moved out without a positive coupling or the like. between these two links would be required apart from a stop-like driving connection.
  • the workpiece carrier 45 has a plate-shaped base body 50, on the top of which the two clamping devices 46 are fastened and the top of which forms the floor boundary of a receiving zone 51 in which the section 43 is essentially open and freely accessible from all sides between the clamping devices 46, that its central axis is aligned approximately at right angles to the connection sections 7.
  • the section 43 is held exclusively over the clamped end sections of the capillary tube 2, so that it does not have to be clamped or in contact with itself.
  • the end surface of the workpiece carrier 45 penetrated by the respective end or connection section 7 forms a reference surface 52, against which the associated end of the capillary tube 2 can be aligned axially to a specific reference dimension, so that a precisely defined position of this end is to be produced for the successive work stations Connections are given.
  • two guides 53 lie opposite each other on both sides of the receiving zone 51, which, like the tensioning devices 46, only protrude above the upper side of the base body 50 and z. B. by parallel to the connecting sections 7 sockets for the engagement of guide bolts are formed.
  • These guide bolts can be provided for displacing the device 40 parallel to the connecting sections 7 and / or, in the manner of link components of a chain transporter, can be used to connect successively connected devices 40 transversely to the connecting sections 7 and in particular approximately parallel to the plate plane of the base body 50 or to further transport to the central axis of section 43 from workstation to workstation.
  • the device 40 can be operated according to the following method: After the capillary tube 2, which has been gathered by forming the section 43, is clamped in the manner described, the connecting pieces 10 are plugged onto both projecting connection sections 7. The widenings 22 are then produced and the connections 20 are then produced. Before the manufacture of the section 43, the hose 44 was already pushed on and wound together with the section 43. The production of both widenings 22 or connections 20 can also take place simultaneously, like the plugging on of the connecting pieces 10, although these operations can also be carried out successively with the same tool in that the device 40 successively with both connecting sections about an axis perpendicular to its plate plane 7 is turned into the working area of this tool.
  • connection unit 6 can first be pushed on and then the connection 31 can be established, after which the connection unit 4 can be brought together with the associated connection piece 10 in the assembly position and then attached by welding.
  • the intermediate piece 15 is already preassembled with the connection unit 4, its vessel parts 34, 35 can also already be connected to one another and the connection takes place by plugging the intermediate piece 15, which may already have been preassembled with the switching arm 39, onto the associated connecting piece 10 10 pre-assembled with the intermediate piece 15 or formed in one piece, they are brought together by flat contact with the vessel part 34, after which the connection 38 is established and then the vessel part 35 is assembled and fastened.
  • a connecting piece 10 can also be formed in one piece with an intermediate piece 15, so that connections 30, 30a, 30b can be completely dispensed with.
  • Such a solution is conceivable in all the described embodiments, in the case of the embodiment according to FIG. B. in that the expansion tool for producing the expansion 22a is inserted from the opposite end side through the through hole 41.
  • the exposed connections can be made using suitable methods, e.g. B. optically - be checked for leaks.
  • the large effective length of the capillary tube interferes with all work operations 2 in no way because it is gathered in a narrow space by section 43.
  • the capillary tube 2 can be produced by cutting to length from a substantially longer strand of material, one or both end surfaces expediently being at right angles to the tube axis, since the design according to the invention prevents the connecting section from being inadvertently applied with its end surface to the opposite boundary wall of the associated fluid space 28 and is closed thereby. If the connection section 7 is provided with the widening 22, the end of the capillary tube also does not need to be deburred because such a burr cannot inadvertently close the tube channel at the tube end or narrow it inadmissibly.
  • the outer surface 25 of the connecting piece 10 can also be conically tapered at one or both ends in order to facilitate the insertion into the receiving bore of the respectively associated connection unit 4 or 6 by self-centering; Accordingly, the receiving bore or opening can be widened like a funnel.
  • the connector 10 can due to its simple, for. B. undercuts free training on a striking machine in one operation from a z. B. sleeve-shaped blank, which in turn is formed by a tube section.
  • the materials of the connecting piece, the intermediate piece, the capillary tube, the respective connecting wall and the respective connection expediently have essentially the same voltage potential with regard to the voltage series of metallic materials, so that even at elevated temperatures and long periods of use, corrosion risks at the connection points are avoided. All components and arrangements can be provided only once or in a plurality.

Landscapes

  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Wire Bonding (AREA)
  • Pipeline Systems (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Electric Cable Installation (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Windings For Motors And Generators (AREA)
EP92113781A 1991-08-22 1992-08-13 Système de conduction à tube capillaire ainsi que la fabrication d'un système de conduction à tube capillaire Expired - Lifetime EP0529419B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4127747A DE4127747A1 (de) 1991-08-22 1991-08-22 Kapillarrohr-leitungssystem sowie verfahren und vorrichtung zur herstellung eines kapillarrohr-leitungssystems
DE4127747 1991-08-22

Publications (3)

Publication Number Publication Date
EP0529419A2 true EP0529419A2 (fr) 1993-03-03
EP0529419A3 EP0529419A3 (en) 1993-06-16
EP0529419B1 EP0529419B1 (fr) 1997-12-29

Family

ID=6438815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113781A Expired - Lifetime EP0529419B1 (fr) 1991-08-22 1992-08-13 Système de conduction à tube capillaire ainsi que la fabrication d'un système de conduction à tube capillaire

Country Status (9)

Country Link
US (1) US5358288A (fr)
EP (1) EP0529419B1 (fr)
JP (1) JP3331550B2 (fr)
AT (1) ATE161655T1 (fr)
AU (1) AU662158B2 (fr)
DE (2) DE4127747A1 (fr)
ES (1) ES2111588T3 (fr)
SI (1) SI9200177B (fr)
TR (1) TR26449A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013200279A1 (de) 2013-01-10 2014-07-10 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Betrieb eines Backofens und Backofen
DE102017223290A1 (de) * 2017-12-19 2019-06-19 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Verändern eines Arbeitsfluids in einem Ausdehnungssystem und Ausdehnungssystem

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IT245304Y1 (it) * 1998-03-12 2002-03-20 Ge Procond Elettronica Spa Termostato perfezionato
US7013617B2 (en) * 1999-04-01 2006-03-21 The Boc Group, Plc Method of filling and sealing
DE19948142A1 (de) * 1999-09-28 2001-04-19 Mapress Gmbh & Co Kg Verfahren zur Herstellung eines Preßfittings
US8418565B2 (en) * 2006-06-29 2013-04-16 Krohne Ag Heated pipe connecting device for installation of a flow meter
CN105605343A (zh) * 2016-03-02 2016-05-25 深圳威迈斯电源有限公司 一种管连接结构

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US1245912A (en) * 1915-12-07 1917-11-06 Ray G Hedden Hose-coupling.
GB308806A (fr) * 1928-03-30 1930-06-26 Vereinigte Stahlwerke Aktiengesellschaft
US2005087A (en) * 1932-04-30 1935-06-18 American Brass Co Method and means of securing spuds and similar fittings in range boilers and other vessels, pipes, etc.
GB394129A (en) * 1932-05-21 1933-06-22 Babcock & Wilcox Ltd Jointing tubes to the drums, headers or the like of heat exchangers
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013200279A1 (de) 2013-01-10 2014-07-10 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Betrieb eines Backofens und Backofen
DE102017223290A1 (de) * 2017-12-19 2019-06-19 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Verändern eines Arbeitsfluids in einem Ausdehnungssystem und Ausdehnungssystem
US11761822B2 (en) 2017-12-19 2023-09-19 E.G.O. Elektro-Geraetebau Gmbh Method for changing a working fluid in an expansion system, and expansion system

Also Published As

Publication number Publication date
ATE161655T1 (de) 1998-01-15
JP3331550B2 (ja) 2002-10-07
JPH05263981A (ja) 1993-10-12
DE59209084D1 (de) 1998-02-05
AU2120292A (en) 1993-02-25
ES2111588T3 (es) 1998-03-16
US5358288A (en) 1994-10-25
TR26449A (tr) 1995-03-15
EP0529419A3 (en) 1993-06-16
EP0529419B1 (fr) 1997-12-29
SI9200177A (en) 1993-03-31
DE4127747A1 (de) 1993-02-25
SI9200177B (en) 2001-10-31
AU662158B2 (en) 1995-08-24

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