EP4367424A1 - Clapet antiretour magnétique - Google Patents

Clapet antiretour magnétique

Info

Publication number
EP4367424A1
EP4367424A1 EP22741278.0A EP22741278A EP4367424A1 EP 4367424 A1 EP4367424 A1 EP 4367424A1 EP 22741278 A EP22741278 A EP 22741278A EP 4367424 A1 EP4367424 A1 EP 4367424A1
Authority
EP
European Patent Office
Prior art keywords
valve
magnet arrangement
valve body
arrangement
check valve
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
EP22741278.0A
Other languages
German (de)
English (en)
Inventor
Patrick DENOTH
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.)
Liquitec Ag
Original Assignee
Liquitec Ag
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 Liquitec Ag filed Critical Liquitec Ag
Publication of EP4367424A1 publication Critical patent/EP4367424A1/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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
    • F16K31/084—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet the magnet being used only as a holding element to maintain the valve in a specific position, e.g. check valves
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems

Definitions

  • the present invention relates generally to a magnetic check valve, particularly for use in a sterile environment.
  • Check valves are used to allow fluid flow in only one direction. If the pressure in the other direction is greater than the closing force, the fluid opens the valve. Designs are generally known in which a valve body closes the fluid channel counter to the direction of flow, with the closing force of the valve body being applied via a coil spring. One variant is the substitution of the spring with a repelling magnet arrangement, which reduces contamination in the valve arrangement.
  • valves are already known from CN 101871539 B, in which a first magnet is located on the valve body and a second magnet on the valve body guide, with the two ring-shaped exposed magnets repelling one another, as a result of which the valve body opposes the fluid channel blocks the direction of flow.
  • the valve seals against the fluid via an exposed radial sealing ring on the valve body.
  • a magnetic check valve for plumbing is also known in which two repelling magnets press a valve body sealingly against a fluid channel.
  • the guide pin of the valve body dips into a blind hole in the valve body guide and thus forms a cavity with it.
  • the magnets are arranged in such a way that the respective end faces repel each other.
  • the valve body seals via an exposed sealing ring on the valve body.
  • the present invention solves this problem.
  • the present invention provides a magnetic check valve with a valve body and a valve housing arrangement, the valve body being guided in an axially displaceable manner in the valve housing arrangement and closing the fluid channel of the valve housing arrangement by a holding force counteracting the direction of flow, the axial holding force being repelling magnet arrangement is produced, wherein a concentric piston connected to the valve body via the end face comprises a first magnet arrangement and the valve body guide comprises a second magnet arrangement, the first magnet arrangement being arranged in a cavity of the piston and being surrounded on all sides in a media-tight manner and the second magnet arrangement in a cavity of the valve body guide and is surrounded on all sides in a media-tight manner.
  • FIG. 1 shows a sectional view of an embodiment of a magnetic check valve according to the invention
  • FIG. 2 shows a first embodiment of a schematic magnet arrangement
  • FIG. 2A shows a second embodiment of the magnet arrangement.
  • FIG. 3 shows a first embodiment of a second magnet arrangement
  • FIG. 3A shows a second embodiment of the second magnet arrangement
  • FIG. 4 shows a first embodiment of the all-round encasing of a first magnet arrangement by a piston
  • 4A shows a second embodiment of the all-round encasing of the first magnet arrangement by the piston
  • 4B shows a third embodiment of the all-round encasing of the first magnet arrangement by the piston
  • 4C shows a fourth embodiment of the all-round encasing of the first magnet arrangement by the piston
  • FIG. 1 shows a magnetic check valve according to the invention.
  • a first magnet arrangement comprises a rod-shaped magnet arrangement through which the central axis passes.
  • the magnet arrangement comprises at least one magnet.
  • the rod-shaped magnet can have a round cross-sectional geometry.
  • the polarity of the magnet arrangement is divided transversely to the axis of rotation.
  • the locking force of the valve is set via the strength of the magnetic field.
  • the magnet is selected according to the required holding force before assembly.
  • the first magnet arrangement is aligned along the axis of rotation of the valve in accordance with an even distribution of force.
  • the second magnet arrangement comprises an annular magnet arrangement which is aligned concentrically with the piston.
  • the magnet arrangement comprises at least one magnet, which is aligned concentrically to the first magnet arrangement.
  • the second magnet arrangement can comprise an annular, one-piece magnet or a plurality of bar magnets with the same polarity, which are arranged radially around the axis of rotation, the polarity of the magnet arrangement being divided transversely to the axis of rotation.
  • the first magnet arrangement partially penetrates the second magnet arrangement.
  • the polarity of the first and second magnet configurations is such that the end faces of the first and second magnet configurations repel each other. Due to the combination of bar magnet and ring magnet, an additional radial force is generated due to the closed magnetic field lines in addition to the axial force. Since the second magnet arrangement is mounted in a fixed manner and the first magnet arrangement is mounted in an axially displaceable manner, the first magnet arrangement is mounted radially, which additionally minimizes the friction of the valve body, as a result of which abrasion is reduced.
  • the first magnet arrangement is enclosed by the cavity of the piston in a materially bonded manner. Due to the complete encapsulation, no residues or deposits should form on the piston. For a clean valve run it is advantageous if the outer geometry of the piston is as free as possible of notches or bumps.
  • the multi-part piston housing can be closed by TIG, MIG/MAG or laser welding. In this case, a low heat input into the magnet arrangement is advantageous since magnets lose their magnetic properties if the thermal load is too high. Laser welding is characterized by a high welding speed and low thermal input, which means that the magnetization is retained.
  • the second magnet arrangement is enclosed in a materially bonded manner by the cavity of the valve body guide.
  • the components of the valve body guide are preferably connected by means of laser welding, with the second magnet arrangement being introduced into the cavity of the valve body guide provided for this purpose before joining.
  • the geometry of the valve body guide is ring-shaped so that no cavities form as far as possible.
  • valve body guide is made of stainless steel.
  • stainless austenitic steel is preferred.
  • the material 1.4435 is resistant to all forms of corrosion and can therefore be used in a sterile production environment such as medical technology, the pharmaceutical industry or food processing.
  • the piston includes a shoulder to limit the immersion depth of the valve body.
  • the first magnet arrangement can "dip" too far into the second magnet arrangement.
  • the magnetic field acting in the longitudinal direction counter to the fluid flow can be reversed, as a result of which the valve remains permanently open.
  • there are shoulders on the piston which can be designed as a turned paragraph.
  • the first magnet arrangement and/or the second magnet arrangement comprises high-temperature-resistant magnets.
  • the non-return valves are autoclaved at temperatures of up to 140 °C.
  • Widespread type N magnets such as N52 neodymium magnets (NdFeB) permanently lose magnetization at a temperature of 65 °C, which changes the preset holding force of the valves and the check valve becomes unusable. Therefore, high-temperature magnets with a service temperature of at least 140 °C (e.g. type SH, UH, EH, AH, Y) are used.
  • the closing force of the valve body is adjusted via the magnet strength.
  • apart from the Magnet arrangements may be carried out as all components of the check valve in a non-magnetic rule material.
  • the individual components are preferably made of an identical material in order to avoid contact corrosion.
  • the magnet arrangements are preferably designed as permanent magnets. By selecting the magnet before assembly, the holding force of the valve body can be preset according to customer requirements.
  • valve body guide is connected via a cage located within the valve body assembly.
  • the cage can be connected to the valve guide housing in a non-positive or positive manner.
  • valve housing arrangement can be divided radially and is connected in a sealing manner via at least one radial sealing ring.
  • the mutually directed end faces of the valve housing arrangement have a circumferential groove corresponding to the cross section of the radial sealing ring.
  • the radial sealing ring can be designed as an O-ring, flat or profile sealing ring.
  • the sealing ring can be made of the materials EPDM, silicone, FEP silicone, FKM, FFKM or as a PTFE-based composite material (Gylon®, Tuf-Steel®).
  • valve housing arrangement is divided into two, which comprises a valve body housing and a valve guide housing, the connection being force-locked via a union screw connection.
  • the check valve can be installed without special tools or dismantled into its individual parts for cleaning or maintenance.
  • the valve body housing or the valve guide housing includes an external thread in the cylindrical area of the mutually directed end faces.
  • the housing part without an external thread has a shoulder on the outside, with both housing halves being screwed together using a union nut.
  • valve seat surface of the valve body is made of PTFE.
  • the valve body can be designed as a membrane or as a ball variant.
  • the valve body can have a partial PTFE coating in the area of the valve seat or be made entirely of PTFE, which avoids gaps in which residues can form.
  • Fig. 1 shows a sectional view of a magnetic check valve 100 with a valve body 1, which is concentrically connected to a piston 7 via the end face.
  • the piston 7 is axially displaceable, positioned concentrically in a valve body guide 6 along the longitudinal direction of the valve and penetrates the valve body guide 6 completely.
  • the piston 7 includes in one cavity provided for this purpose has a rod-shaped first magnet arrangement 4, the first magnet arrangement being surrounded on all sides by the piston 7.
  • the valve body guide 6 is statically connected to the valve guide housing 2b in a non-positive and/or positive manner via a cage 9.
  • the valve body guide 6 includes a cavity in which an annular second magnet assembly 5 is surrounded on all sides.
  • the polarity of the first and second magnet arrangement 4, 5 is arranged oppositely, as a result of which the valve seat surface 12 of the valve body 1 is pressed counter to the flow direction 14 in the conically tapering area of the valve body housing 2a. As a result, the fluid channel 3 remains closed counter to the direction of flow 14 until a pressure of the fluid can overcome the restoring force of the repelling magnet arrangement 4, 5.
  • the immersion depth of the valve body 1 is limited by a shoulder 8 in the form of a shoulder on the piston 7.
  • the valve body housing 2a is coupled to the valve guide housing 2b via a union nut 11 .
  • a radial sealing ring 10 is inserted between the contact surfaces of the valve body housing 2a and the valve guide housing 2b, with both housing halves 2a, 2b having a circumferential groove which together form a cross section for receiving the radial sealing ring 10.
  • Fig. 2 and Fig. 2A show schematic representations of the first and second Magnetan arrangement 4, 5 in the installed state to each other.
  • the first and second magnet assemblies are magnetized axially through the magnet elevation axis.
  • Fig. 2 shows a first embodiment in which the force acting against the direction of flow 14 via the south pole S1 of the first Magnetanord voltage 4 and S2 of the second magnet assembly 5 is caused.
  • FIG. 5 shows a second embodiment of the orientation of the magnet assemblies 4, 5, wherein the acting force on the north pole NI of the first magnet assembly 4 and N2 of the second magnet assembly 5 is caused.
  • Figures 3 and 3A show embodiments of the second magnet assembly, with a first embodiment in Figure 3 comprising an annular one-piece magnet assembly.
  • FIG. 5 shows a second embodiment of the second magnet assembly 5, wherein a plurality of bar magnets 5A are arranged radially around the axis of rotation.
  • the longitudinal axes of all bar magnets 5A are arranged parallel to the axis of rotation, with the bar magnets 5A being magnetized axially through the magnet height axis.
  • FIG. 4 the housing of the piston 7 is divided radially in the area of the first magnet arrangement 4 .
  • both housing parts of the piston 7 are automatically aligned concentrically via the first magnet arrangement 4, with the two housing parts of the piston 7 being connected to one another via a weld seam S.
  • FIG. 7 shows a second embodiment, in which the piston 7 is divided radially in the area of the end face of the magnet arrangement 4 and forms a common plane, the parting plane of the two housing parts of the piston 7 having a shoulder.
  • FIG. 4B shows a third embodiment, in which the end face of the piston 7 facing away from the valve body has a blind hole for inserting the magnet arrangement 4, the hole being closed with a radial weld seam S via a cylindrical or conical closure at the end.
  • FIG. 4C shows a fourth embodiment, in which the end face of the piston 7 facing the valve body 1 has a blind hole for inserting the magnet arrangement 4, the hole being sealed with a radial weld seam S via a cylindrical sealing piece at the end.
  • This arrangement means that the weld seam S is as far away from the magnet arrangement 4 as possible, as a result of which the heat input is further reduced.
  • the weld seam S is covered by the valve body 1 in this arrangement.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne un clapet antiretour magnétique (100) présentant un corps de clapet (1) et un agencement de logement de clapet (2), le corps de clapet (1) étant guidé de manière à pouvoir être déplacé axialement dans l'agencement de logement de clapet (2) et fermant le conduit de fluide (3) de l'agencement de logement de clapet (2) au moyen d'une force de maintien agissant à l'encontre du sens d'écoulement, la force de maintien axiale étant générée par un agencement d'aimants répulsifs, un piston concentrique (7) relié au corps de clapet (1) par l'intermédiaire de la face d'extrémité comprenant un premier agencement d'aimants (4) et le guide de corps de clapet (6) comprenant un second agencement d'aimants (5), le premier agencement d'aimants (4) étant disposé dans une cavité du piston (7) et étant enfermé de manière à être étanche aux milieux de tous les côtés, et le second agencement d'aimants étant disposé dans une cavité du guide de corps de clapet (6) et étant enfermé de façon à être étanche aux milieux de tous les côtés.
EP22741278.0A 2021-07-08 2022-07-08 Clapet antiretour magnétique Pending EP4367424A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202021103675.3U DE202021103675U1 (de) 2021-07-08 2021-07-08 Magnetisches Rückschlagventil
PCT/EP2022/069190 WO2023281104A1 (fr) 2021-07-08 2022-07-08 Clapet antiretour magnétique

Publications (1)

Publication Number Publication Date
EP4367424A1 true EP4367424A1 (fr) 2024-05-15

Family

ID=82494057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22741278.0A Pending EP4367424A1 (fr) 2021-07-08 2022-07-08 Clapet antiretour magnétique

Country Status (5)

Country Link
US (1) US20240142018A1 (fr)
EP (1) EP4367424A1 (fr)
CN (1) CN117677786A (fr)
DE (1) DE202021103675U1 (fr)
WO (1) WO2023281104A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4285498A (en) 1976-05-17 1981-08-25 Imperial Chemical Industries Limited Control valves
JPH03213777A (ja) 1990-01-13 1991-09-19 Inax Corp 逆止弁
JP2000337539A (ja) 1999-05-25 2000-12-05 Tokyo Flow Meter Kenkyusho:Kk 逆止弁
DE102005029588A1 (de) * 2005-06-25 2007-01-04 Artech Gmbh Design + Production In Plastic Tintenkartusche
CN101871539B (zh) 2010-07-08 2012-09-26 厦门松霖科技有限公司 磁力止逆阀
BE1027399B1 (fr) 2019-07-03 2021-02-01 Safran Aero Boosters Sa Dispositif à clapet magnétique
CN110608304A (zh) * 2019-10-23 2019-12-24 江西三丰医药科技有限公司 单向阀

Also Published As

Publication number Publication date
US20240142018A1 (en) 2024-05-02
CN117677786A (zh) 2024-03-08
WO2023281104A1 (fr) 2023-01-12
DE202021103675U1 (de) 2022-10-13

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