WO2020020836A1

WO2020020836A1 - Valve

Info

Publication number: WO2020020836A1
Application number: PCT/EP2019/069702
Authority: WO
Inventors: Bruno Staiger
Original assignee: Staiger Gmbh & Co. Kg
Priority date: 2018-07-25
Filing date: 2019-07-22
Publication date: 2020-01-30
Also published as: DE102018212434A1

Abstract

The invention relates to a valve for gaseous or liquid media, comprising a valve body (2, 52) having an inlet (8, 58), and outlet (10, 62), a valve chamber (5, 60) and a media valve seat (9, 61), a plate armature (11, 11', 11'', 11''') having an armature disc (12, 12', 12'', 12'''), a Woodruff key (13, 13', 13'') and a sealing body (14, 14', 14'', 14''') having a sealing face (15) for bearing tightly against the media valve seat (9, 61), and a magnetic head (3, 3', 3'') having an electric coil (30) and an inner core (19) and an outer core (20, 46, 51), between which a non-magnetisable separation is provided, wherein the outer core (20, 46, 51) of the magnetic head (3, 3', 3'') with a casing part (24, 24', 48) surrounding the electric coil (30), a lower part (25, 25', 47) and a base part (26, 26') which faces the plate armature (11, 11', 11'', 11''') and engages the electric coil (30) from beneath at the end face is formed as a structural unit. The casing part (24, 48), the lower part (25, 47) and the base part (26) of the outer core (20, 46) of the magnetic head (3, 3', 3'') are formed here from sheet metal.

Description

description

Valve

The invention relates to a valve for gaseous or liquid media.

Such a valve has a valve body with an inlet, an outlet, a valve chamber and a media valve seat. In particular, the inlet preferably opens into the valve chamber via the media valve seat, the outlet being connected to the valve chamber in terms of flow technology.

It is also possible for the outlet to open into the valve chamber via the media valve seat, the inlet being fluidically connected to the valve chamber. The inlet is thus fluidically connected to the outlet - with the valve open - via the valve chamber. The valve also has a plate armature with an armature disk, a disk spring and a sealing body, the sealing body having a sealing surface which is designed to lie tightly against the media valve seat in the closed state of the valve. By moving the plate anchor with the armature washer and the sealing body, in particular against an elastic restoring force of the disc spring, the valve can be opened or closed by pushing the sealing surface against the media valve seat or lifting it off the media valve seat. The valve also has a magnetic head with an electrical coil and an inner core and an outer core, a non-magnetizable separation being provided between the inner core and the outer core. The magnetic head is used to actuate the disk Anchors and in particular for moving the valve between an open state and a closed state - and vice versa - set up. In particular, by energizing the electrocoil and by refraining from energizing, or by varying the energization, a magnetic field can be generated, switched off or changed in order to shift the plate armature and thus in particular the sealing surface relative to the media valve seat.

The outer core of the magnetic head has a jacket part encompassing the electrocoil, a lower part, which can preferably be coupled to the valve body, or connected to the valve body, or formed in one piece with the valve body, and a base part facing the plate armature, which engages under the electrocoil on the front side. The outer core is designed as a unit. In particular, the jacket part, the lower part and the bottom part are formed together as a structural unit.

In such a valve it can be provided that the outer core is formed from solid material, in particular machined from a blank or molded body. This requires a comparatively heavy design of the outer core, as well as a complicated and expensive manufacture of the same.

The invention has for its object to provide a valve for gaseous or liquid ge media, which does not have the disadvantages mentioned.

The object is achieved by creating a valve with the features of claim 1. Advantageous embodiments result from the claims at under.

The object is achieved in particular by further developing a valve of the type mentioned above in that the jacket part, the lower part and the bottom part of the outer core are formed from sheet metal. This makes it possible to manufacture these parts - either individually or together, in particular in one piece - comparatively thin-walled and thus easily, simply and inexpensively. In particular, these parts, preferably the outer core overall, can be produced simply and inexpensively by means of punching and bending technology. At the same time, it is possible to manufacture the outer core with high precision and permanent reliable functionality.

That the valve is suitable for use with gaseous or liquid media includes that the valve is suitable for use with gaseous and liquid media, for example by the valve being optionally with a gaseous or liquid medium, or simultaneously with a gaseous and a liquid medium is applied.

A structural unit is understood here in particular to mean a component or an assembly that can be handled separately from other parts without falling apart. Individual parts of this structural unit can be joined or connected to one another, but it is also possible for the structural unit to be formed in one piece.

A one-piece design is understood in particular to mean that individual areas or parts of the structural unit are not joined to one another, but - in particular seamlessly - merge into one another. Accordingly, “one-piece” means in particular “from one piece” as opposed to “joined”.

In the following, “uniform material” is understood in particular to mean that a so-called part is consistently made of the same material or consists of the same material, or that several so-called parts - in particular overall and in connection with the term “in one piece” also consistently - are formed from the same material, in particular consist of the same material.

A sheet is in particular understood to mean a sheet material which has an extension, in particular thickness, along an excellent direction, which is very much smaller than an extension along the directions which are linearly independent of this excellent direction, in particular perpendicular thereto, be it in the Cartesian coordinate system or in any other coordinate system, such as spherical Polar coordinates or cylindrical coordinates. The sheet may in particular be a metal sheet, an organic sheet, or a semi-finished product made from a plurality of different materials, in particular a material mix, very particularly a semi-finished product with a layered structure.

According to a development of the invention, it is provided that the outer core is made in one piece, preferably of the same material. In particular, the jacket part, the lower part and the bottom part are formed in one piece with one another, preferably in the same material. The one-piece, preferably material-uniform design of the outer core requires particularly simple and inexpensive production, preferably by means of stamping and bending technology.

Alternatively, it is possible that the jacket part, the lower part and the bottom part are assembled as separate parts to form the structural unit. It is also possible that the jacket part, on the one hand, and the bottom part with the base part, on the other hand, are joined together as separate, manufactured individual parts to form the structural unit. It is in particular possible that the lower part and the bottom part are formed in one piece with one another, in particular of the same material, and are joined to the structural unit with the jacket part. Alternatively, it is also possible for the jacket part and the lower part to be formed in one piece, in particular in a uniform manner, with them being joined to the structural unit with the bottom part. In this way, too, the various parts can be produced simply and inexpensively from sheet metal, in particular by means of punching and bending technology, and joined to the outer core.

According to a development of the invention, it is provided that the jacket part of the outer core has a division, the jacket part being joined to the division. In this way, the jacket part can be produced in a particularly simple and inexpensive manner, in particular by means of stamping and bending technology.

According to a development of the invention, it is provided that the jacket part of the outer core has at least one closure on the division. aid the closure, it is possible in a particularly simple and quick manner to join the jacket part at the division.

According to a development of the invention, it is provided that the closure of the jacket part has at least one projection which engages in a receptacle. This represents a particularly simple and quick-to-fit configuration of the closure.

According to a development of the invention, it is provided that the jacket part and the lower part of the outer core are connected via at least one coupling. In this way, the jacket part on the one hand and the lower part on the other hand provides easily and inexpensively as separately produced items and can be quickly and easily joined together.

According to a development of the invention, it is provided that the coupling of the outer core has at least one connector engaging in a recess. This represents a particularly simple and easy-to-fit configuration of the coupling. The at least one connector can in particular be designed as a projection, in particular as a projection extending in the axial direction from the lower part or alternatively from the jacket part extending in the axial direction. If the casing part has the at least one projection, the lower part preferably has the recess into which the projection can engage. Conversely, if the lower part has the projection, the jacket part has the corresponding recess.

The connector designed as a projection and / or the projection of the closure provided on the division of the casing part preferably has a dovetail geometry. Such a geometry, which in particular corresponds to a truncated triangle with side edges widening towards the outside, is particularly easy to join and at the same time results in a very stable fastening.

An axial direction is understood here to mean in particular a direction which extends along a longitudinal axis of the casing part and / or the lower part is preferably also a longitudinal axis or central axis of the valve. If at least one of these elements is designed to be rotationally symmetrical, this longitudinal or central axis preferably coincides with the axis of symmetry of this rotational symmetry.

According to a development of the invention, it is provided that a thickness of the base part is approximately twice as large, preferably twice as large, as a wall thickness of a peripheral wall of the lower part. In this way, the bottom part can be made particularly stable.

According to a development of the invention, it is provided that the bottom part of the lower part defines an imaginary floor plane, in particular extends in the imaginary floor plane, the bottom part having a bent part arranged parallel to the imaginary floor plane. The bent part is in particular a region of the base part that is bent through 180 ° and is placed against a base part of the base part or is placed on the base part. The bottom part is accordingly folded or folded over in some areas by 180 ° and is double-walled in the area of the bent part. In this way, the bottom part can be strengthened simply, quickly and inexpensively.

According to a development of the invention, it is provided that the bent part is arranged on a side of the base part facing the electrocoil.

The bottom part is therefore bent towards the electrical coil. This configuration requires a particularly high stability of the bottom part.

According to a development of the invention, it is provided that the lower part of the outer core with the peripheral wall and the bottom part is made in one piece, in particular made of the same material. The lower part of the outer core is preferably cup-shaped with the peripheral wall and the bottom part. An axial passage is preferably formed in the bottom part. In this way, the valve as a whole can be constructed simply and at the same time functionally. According to a development of the invention, it is provided that the valve body with a cup-shaped valve chamber housing, a media connection and the media valve seat is formed in one piece from a sheet, in particular in the same material. In this way, a plurality of functions, in particular the function of the media connection and the media valve seat, can be integrated into the valve body formed in one piece from a sheet metal. This requires a particularly simple and, at the same time, inexpensive design and lubrication position of the valve.

According to a development of the invention it is provided that the Medienven valve seat is formed on a molded on the media connection and this axially enforcing media tube. The media tube is preferably also formed in one piece with the valve chamber housing, the media connection and the media valve seat, in particular formed from a sheet metal. This requires a simple, inexpensive and at the same time functionally reliable configuration of the valve.

According to a development of the invention, it is provided that the magnetic head and the valve body with a media connection - in particular with the media connection, which is formed in one piece, in particular of the same material, with the valve chamber housing and the media valve seat, with the media, which axially penetrates through it, preferably at the media connection is formed - is formed rotationally symmetrical with respect to the center axis. This requires a particularly simple and reliable design of the valve.

According to a development of the invention, it is provided that the non-magnetic separation between the inner core and the outer core is designed as a free space or separation gap. This requires a particularly simple design of the non-magnetizable separation.

According to a development of the invention, it is provided that the free space of the separation of a peripheral surface of the inner core and a wall surface comprising the passage of the base part is limited. According to a development of the invention it is provided that a sealing ring is arranged in the axial direction between the electrocoil and the base part and the free space of the separation, which is supported circumferentially on the peripheral surface of the inner core and on an inner surface of the lower part of the outer core. In particular, the sealing ring is arranged in a plane between the electrical coil and the base part and the free space of the separation.

According to a development of the invention, it is provided that the separation is a non-magnetizable separation ring which is arranged hermetically sealed between the peripheral surface of the inner core and the wall surface delimiting the passage of the base part. In this way, the non-magnetizable separation can be combined with the function of a seal.

According to a development of the invention, it is provided that the thickness of the separating ring is axially smaller than the thickness of the bottom part, and that a stop face of the bottom part facing the armature disk of the plate anchor projects axially beyond the separating ring. This ensures that the plate anchor does not strike the separating ring, so that the separating ring is mechanically protected.

According to a development of the invention, it is provided that the separating ring on one end face facing the armature disk of the plate anchor has a stop surface part which forms a common plane with the stop surface of the bottom part of the outer core, and has a recess adjoining the stop surface with a recessed surface , In this way, a large-area, defined stop for the plate anchor is also provided on the separating ring, but not the entire end face of which is provided for attaching the plate anchor. This also protects the separating ring and the plate anchor mechanically. The plate anchor strikes in particular only on the stop surface part, but not on the recess set back in the axial direction relative to this, that is to say not on the recessed recess surface. According to a development of the invention, it is provided that the stop surface part of the separating ring is larger in the radial direction than the recessed recess surface. In this way, a relatively large total area is made available for attaching the plate anchor. In particular, the mechanical wear of the contact surfaces can be kept low.

According to a development of the invention, it is provided that the inner core has a valve seat closable by a second sealing surface of the sealing body and a channel assigned to it. In this way, the valve can be designed as a three-way valve.

Alternatively, the valve is preferably designed as a two-way valve.

According to a development of the invention, it is provided that the valve seat of the inner core is designed as a vent valve seat or second media valve seat and the channel of the inner core is designed as a vent channel or as a media channel with a media line connection. The valve can thus in particular optionally be designed as a three-way valve equipped with a vent or as a three-way valve with three media paths, in particular as a three-way proportional valve.

According to a development of the invention, it is provided that the ventilation valve seat or the media secondary valve seat axially projects over an end face of the inner core. In this way, the corresponding valve seat can have particularly favorable sealing properties.

According to a development of the invention, it is provided that the armature plate, the sealing body and the disc spring of the plate armature are designed with one another as a structural unit, in particular are combined in a structural unit. This represents a particularly easy-to-use design of the Plattenan core, which in particular is preassembled and, as a whole, can be arranged in the valve as a unit. According to a development of the invention it is provided that the sealing body of the plate anchor is arranged as a truncated cone in a conical bore of the armature disk and is overlapped on the sealing surface by a perforated edge of the disc spring. This represents a particularly suitable embodiment of the sealing body, in particular in cooperation with the disc spring.

According to a development of the invention, it is provided that the sealing body of the plate anchor has an extension on the frustoconical bearing mounted in the conical bore of the armature disk, which extends through a hole in the disk spring. In this way, the sealing body can be coupled to the disc spring in a particularly stable manner.

According to a development of the invention, it is provided that the sealing body of the plate anchor has a seal holder which has a rivet pin which penetrates the disc spring and is fixed in the armature disc. In this way, the sealing body can be connected in a particularly secure and stable manner on the one hand to the disc spring and on the other hand to the armature washer via the seal holder.

According to a development of the invention, it is provided that the armature disk of the plate anchor has a claw part which penetrates the disk spring and which engages in a collar of the sealing body. In this way, the sealing body can be very securely and stably connected to the armature disk.

According to a further development of the invention, it is provided that the disc spring is penetrated by recesses and has spring bars. This represents a particularly favorable configuration of the disc spring through which a medium can flow.

According to a development of the invention, it is provided that the recesses of the disc spring are laterally limited by the spring bars, which are preferably oriented radially and / or in the circumferential direction, and / or spiral, and / or meandering. This results in particularly favorable flow properties through the disc spring. According to a development of the invention, it is provided that an outer edge of the disc spring is fixed to a wall of the valve chamber of the valve body by means of an annular bushing. In this way, the disc spring can be securely and stably mounted in the valve chamber housing. In particular, a special bias of the disc spring can be adjusted, in particular adjusted, by means of the ring bush. In particular, the ring bush is set up for adjusting and / or adjusting the bias of the disc spring.

According to a development of the invention it is provided that the valve with the vent valve seat of the inner core, the vent channel and the second sealing surface of the sealing body of the plate anchor is formed as an on-off switching valve. This represents a particularly advantageous embodiment of the valve.

According to a further development of the invention, it is finally provided that the valve with the media secondary valve seat of the inner core, the media channel, the media line connection and the second sealing surface of the sealing body of the plate anchor is designed as a proportional valve, the armature disk preferably in the area of the recesses of the disk spring, at least one media passage , the magnetic force of the magnetic head is preferably adjustable, the force of the disc spring is preferably in the opposite direction equal to the magnetic force of the magnetic head, and the plate anchor is preferably in any position between "valve open" and "valve closed" in a state of balance or equilibrium , This represents a further particularly advantageous embodiment of the valve.

The invention is explained in more detail below with reference to the drawing. Show:

FIG. 1 and 2 a first exemplary embodiment of a valve with a magnetic separation in an enlarged, partially sectioned side view and in a further enlarged detail view according to “X”, FIG. 3 and 4 show a second exemplary embodiment of a valve with a non-magnetizable separating ring in an enlarged, partially sectioned side view and in a further enlarged detail view according to “Y”,

FIG. 5 and 6 show a third exemplary embodiment of a valve with a graduated non-magnetizable separating ring in an enlarged, partially sectioned side view and in a further enlarged detail view according to Z "

FIG. 7 to 9 a one-piece magnetic head outer core of the valves according to FIG. 1 to 6 in an enlarged overall view, side view and sectional side view according to “A - A”,

FIG. 10 to 12 a two-part magnetic head outer core made of sheet metal for the valves according to FIG. 1 to 6 in an enlarged overall view, side view and sectional side view according to "B - B",

FIG. 13 and 14 the two-part magnetic head outer core of FIG. 10 to 12 in other enlarged side views, partially cut,

FIG. 15 to 17 different deformation stages of a lower part made of sheet metal of the magnetic head outer core of FIG. 13 and 14 in an enlarged sectional side view,

FIG. 18 to 20 another magnetic head outer core, modularly with an inner core and a separating ring, for a valve in a larger overall view, side view and sectional side view according to “C - C”,

FIG. 21 and 22 a sheet metal valve body for a valve in an enlarged side view and sectional side view according to “D - D”,

FIG. 23 and 24 a modular plate anchor with a conical sealing body for a valve in an enlarged top view and a cut side view according to "E - E",

FIG. 25 and 26 show a modular plate anchor with a conical sealing body and extension for a valve in an enlarged top view

and a sectional side view according to "F - F",

FIG. 27 and 28 a modular plate anchor with a seal holder for a valve in an enlarged top view and a sectional side view according to "G - G",

FIG. 29 and 30 show a modular plate anchor with an injected sealing body with collar for a valve in an enlarged top view and a sectional side view according to “Fl - Fl”.

The exemplary embodiments of valves shown in the drawing are provided for gaseous or liquid media. They are designed essentially as a circular cylindrical body with respect to a longitudinal or center axis 1 and have a valve body 2 and a magnetic head 3 connected to it. The valve body 2 has a media connection 4 and a valve chamber 5, which is delimited by a base wall 6 and a peripheral wall 7 is. For the supply of the medium, an inlet 8 is provided in the media connection 4 and the base wall 6 of the valve body 2, the inlet 8 being arranged coaxially with respect to the central axis 1 of the valve, the opening leading into the valve chamber 5 here being designed as a media valve seat 9. In addition, the

Base wall 6 of the valve body 2 has one or more outputs 10 for the medium connected to the valve chamber 5.

An axially displaceable plate armature 11 is mounted in the valve chamber 5 and has an armature disk 12, a disk spring 13 and a sealing body 14 coaxial with the central axis 1, which has a sealing surface 15 for tight contact with the media valve seat 9 and, opposite, a second sealing surface 16 with a smaller diameter , The disk spring 13 is arranged on an underside of the armature disk 12 facing the media valve seat 9. she has a larger diameter than the armature disk 12 and is supported with its outer edge 17 on an annular bushing 18 which is fixed on the peripheral wall 7 of the valve body 2 by means of a press fit.

The magnetic head 3 has coaxially a round rod-shaped inner core 19 and a substantially round cylindrical outer core 20. The inner core 19 is penetrated by a coaxial channel 21 which connects to a valve seat 22 which is formed on the end face of the inner core 19 facing the plate armature 11 is. The channel 21 may be associated with a media line connection 23 at the upper end of the Magnetkop fes 3.

The outer core 20 of the magnetic head 3, which is designed as a structural unit, has a circumferentially cylindrical jacket part 24 with respect to the central axis 1 and a coaxially arranged lower part 25 which has a bottom part 26 at its lower end facing the plate anchor 11. The base part 26 extends radially inwards towards the inner core 19 and has an axial passage 44 (see FIG. 9). The lower part 25, which is slightly smaller in diameter than the jacket part 24 of the outer core 20, is inserted in the valve body 2 and preferably festge press fit on the peripheral wall 7, the outer diameter of which is approximately equal to that of the jacket part 24.

The outer core 20 is formed in one piece or in several parts from sheet metal and, in a preferred embodiment, can be produced inexpensively as a stamped / bent part. In this case, the jacket part 24 can have a division 27 and be joined to it by a closure, which advantageously has at least one projection 29 which engages in a form-fitting manner in a receptacle 28.

In addition, the magnetic head 3 includes an electric coil 30 which is mounted on a coil body 32 having at least one end flange 31 and is located with the latter in an annular space which is delimited by the inner core 19 and the outer core 20. In order to achieve a seal against moisture and other environmental influences, an insulating casting compound can be provided, in which the electrical coil 30 and the coil body 32 are held in the magnet. netkopf 3 are tightly embedded and which also tightly encloses the electrical conductor connection parts 33, 34 of the electrocoil 30 which protrude from the magnetic head 3 above.

In the in the FIG. 1 and 2 shown first embodiment can be seen that the bottom part 26 has a bending part 35, which is bent by 180 degrees - here upwards - and part-contacting on the side facing the electro-coil 30 of the bottom part 26 parallel to a base 261 of the bottom part 26 extends so that there is a double sheet thickness here. The 180 degree bend delimits the axial passage 44 of the base part 26, in which the lower end of the inner core 19 is located. The peripheral surface of the inner core 19 and the 180-degree bend of the bottom part 26 here delimit a free space 36, which represents a magnetic separation between the inner core 19 and the outer core 20.

As shown in FIG. 1 and 2 can be seen, the radial extension of the bottom part 26 with the bending part 35 is about three times larger than the radial extension of the free space 36 between the 180 degree bend and the inner core 19. This is on the bottom part 26 for the bottom the anchor plate 12 is given a large stop surface, so that the mechanical wear of the contact surfaces is low and high functionality is guaranteed.

In a plane between the end flange 31 of the coil body 32 and the bottom part 26 of the outer core 20, a sealing ring 37 is provided, which can be conveniently made of an elastomer and the sealing strand of which is preferably cruciform or square in cross section. The sealing ring 37 lies with its inner ring surface on the peripheral surface of the inner core 19 and with its outer ring surface on the inner wall surface of the lower part 25 of the outer core 20 and also lies on the bending part 35 of the bottom part 26.

The valve of the in the FIG. 3 and 4, the second embodiment is predominantly like the valve of FIG. 1 and 2 executed, so that the same description applies to the same parts. There are differences in the area of magnetic separation.

A circular separating ring 38, which is made of a non-magnetizable material, preferably a stainless steel, is arranged coaxially on the underside of the magnetic head 3 ′ facing the plate armature 11 for the magnetic separation of the inner core 19 and the outer core 20. This separating ring 38 is positioned in the plane of the bottom part 26 associated with the outer core 20 between the latter and the inner core 19, the outer circumferential surface of the separating ring 38 resting firmly against the 180 degree bend of the bottom part 26 and the inner surface of the separating ring 38 against the Circumferential surface of the inner core 19 abuts. The separating ring 38 is positioned between the base part 26 of the outer core 20 and the inner core 19, preferably by means of a press fit and / or cohesively, in particular by welding, so that no medium can penetrate into the magnetic head 3 'even at high operating pressure.

The valve seat 22 of the inner core 19 forms with the plate anchor 1 1 facing lower surface of the bottom part 26, against which the armature disk 12 can strike, a common plane. The end face of the inner core 19 surrounding the valve seat 22 is axially set back somewhat in relation to the valve seat 22. The axial thickness of the separating ring 38 is somewhat smaller than the thickness of the bottom part 26. The separating ring 38 is also axially set back with respect to the lower surface of the bottom part 26, its ring surface facing the plate anchor 1 1 preferably having a common plane with the end face of the inner core 19 forms.

The valve of the in the FIG. 5 and 6, third Ausführungsbei game is predominantly like the valve of FIG. 1 and 2, so that the same description applies to the same parts. There are also differences in the area of magnetic separation.

In this embodiment, for the magnetic separation of the inner core 19 and outer core 20 on the underside facing the plate anchor 1 1 te of the magnetic head 3 "also arranged a circular separating ring 39 coaxially, which is made of a non-magnetizable material, preferably a stainless steel. This separating ring 39 is also positioned in the plane of the bottom part 26 associated with the outer core 20 between the latter and the inner core 19, the outer circumferential surface of the separating ring 39 resting firmly on the 180 degree bend of the bottom part 26 and the inner surface of the separating ring 39 on the Circumferential surface of the inner core 19 abuts. The separating ring 39 is arranged hermetically between the base part 26 of the outer core 20 and the inner core 19, preferably by means of a press fit and / or materially, in particular by welding, so that no medium can penetrate into the magnetic head 3 ″ even at high operating pressure.

The FIG. 5 and 6 that the separating ring 39 has an axial recess 40 on the side facing the plate anchor 11, so that a stop surface part 41 and a recess surface 42 are formed. The stop surface part 41 is radially larger than the recess surface 42, adjoins the lower surface of the base part 26 facing the plate anchor 11 and forms a common plane therewith, so that a relatively large total area is provided for the stop of the armature disk 12. The valve seat 22 is also in the plane of the stop surface part 41. The end face of the inner core 19 surrounding the valve seat 22 is axially somewhat set back relative to the valve seat 22 and preferably forms a common plane with the return surface 42 of the separating ring 39. The axial thickness of the separating ring 39 is equal to the thickness of the bottom part 26 in the area of the stop surface part 41.

Since the entire stop surface corresponding to the armature disk 12, consisting of the stop surface part 41 of the separating ring 39 and the base part 26, is relatively large, the mechanical wear of these contact surfaces is extremely low. This saves complex protective layers or surface hardening processes, and even with a high switching frequency of the valve, long-term reliable functionality is guaranteed. The valve proposed here can preferably be designed as a two-way valve.

In an advantageous embodiment, the valves of FIG. 1 to 6 can be designed as a three-way valve equipped with a vent, which, via the magnetic head 3, 3 ', 3 "and the plate anchor 11, either only in the closed position blocking the flow of media (" valve closed "; closed state) or completely preventing the flow of media releasing opening position ("valve open"; open state) can be switched. Here, the valve seat 22 at the lower end of the inner core 19 as a vent valve seat and the channel 21 in the inner core 19 as out leading vent channel forms. In the respectively shown closed position of the valves, the ventilation valve seat 22 is released, so that the valve chamber 5 is connected to the outside air via the ventilation channel 21. When the magnetic head 3, 3 ″, 3 “is switched on, the magnetic force is activated and, in particular, there is an abrupt axial displacement of the plate armature 11 against the force of the disc spring 13 from the closed position to the open position. The sealing surface 15 of the sealing body 14 lifts off from the media valve seat 9 and completely clears the passage for the medium. At the same time, the armature disk 12 strikes the base part 26, and the second sealing surface 16 of the sealing body 14 ver closes the vent valve seat 22, so that the connection to the outside air is prevented and therefore no medium can escape to the outside.

As soon as the magnetic head 3, 3 ″, 3 ″ is deactivated, the plate anchor 11 is, in particular, suddenly moved axially downward into the closed position by the force of the disc spring 13. The sealing surface 15 closes the media valve seat 9 and blocks the media flow. At the same time, the second sealing surface 16 lifts off the vent valve seat 22, and the valve chamber 5 is again in communication with the outside air.

In another advantageous embodiment, the valves of FIG. 1 to 6 can be designed as a three-way proportional valve, which via the magnetic head 3,

3 ', 3 "and the plate anchor 11 both in the closed position that blocks the flow of media and in the opening position that completely releases the flow of media, and additionally smoothly and delicately in any intermediate position can be controlled between the closed position and the open position. The valve seat 22 at the lower end of the inner core 19 is designed as a second media valve seat and the channel 21 in the inner core 19 as a media channel, to which the media line connection 23 is preferably assigned at the upper end of the magnetic head 3, 3 ', 3 ".

In the respectively shown closed position of the valves, the media valve seat 9 is closed and the media secondary valve seat 22 is released. When the magnetic head 3, 3 ″, 3 ″ is switched on, the magnetic force is activated, and the plate armature 11 is displaced somewhat upwards in the direction of the inner core 19 against the force of the disc spring 13. The sealing surface 15 of the sealing body 14 thus moves away from the media valve seat 9. At the same time, the second sealing surface 16 approaches the media secondary valve seat 22, as a result of which the distance between the media secondary valve seat 22 and the second sealing surface 16 is correspondingly reduced. If the electromagnetic force is low, the sealing surface 15 lifts only very little from the media valve seat 9, so that the entry of the medium into the valve chamber 5 is relatively small. Dage conditions, the opening of the media second valve seat 22 is relatively large due to the relatively large distance between the second sealing surface 16. A part of the medium can thus flow through the outlet 10 to a first consumer. The other part of the medium passes through recesses formed in the disk spring 13 and through at least one media passage formed in the armature disk 12 to the second media valve seat 22 and flows through the media channel 21 and the media line connection 23 to a further consumer.

To achieve this position of the plate anchor 11, the disc spring 13 has traveled only a very small distance, and the force which the disc spring 13 opposes the electromagnetic force is also relatively small. Specifically, it is preferred that the magnetic force pulling the plate anchor 11 upward and the spring force pushing the plate anchor 11 downward are the same and keep the balance, so that the plate anchor 11 is practically in a stable state of suspension. By increasing the electrical current, the magnetic force of the magnetic head 3, 3 ', 3 "can be increased, and the plate armature 1 1 moves further upwards. The distance between the sealing surface 15 and the media valve seat 9 is greater, as a result of which the medium flow rate is increased accordingly. The force of the disc spring 13 has also increased due to the further back path, preferably precisely to the same extent as the magnetic force. The opposing forces are therefore preferably balanced again, so that the plate anchor 1 remains stable in this position and the medium can flow without fluctuations. As the sealing surface 15 moves away from the media valve seat 9, the distance between the media secondary valve seat 22 and the second sealing surface 16 decreases accordingly. In this position, a larger part of the medium can flow through the outlet 10 to the first consumer and a smaller part of the medium can flow through the media line connection 23 to the second consumer.

If an even greater magnetic force is adjusted by increasing the electrical current on the magnetic head 3, 3 ″, 3 ″, the media valve seat 9 is opened further and the plate armature 11 approaches the inner core 19.

The maximum opening of the media valve seat 9 is reached when the second sealing surface 16 bears against the media secondary valve seat 22, so that the latter is blocked and the entire medium supplied finally flows through the outlet 10 to the first consumer. The protruding media second valve seat 22 keeps the armature disk 12 a short distance from the inner core 19 even when the media valve seat 9 is completely open, thereby preventing the formation of a larger hysteresis and always ensuring precise control of the plate armature 11.

In the above-described proportional valve, there is a state of equilibrium of spring force and magnetic force in any position of the plate armature 11 between the closed position and the (maximum) open position. The valve can be used for two different consumers with the help of the electrical see electricity can be smoothly regulated so that individual parts of the medium can be adjusted as required.

The in the FIG. The outer core 20 shown in FIGS. 7 to 9 can advantageously be produced from a sheet metal in the stamping / bending method as a unitary unitary material. The lower part 25 is expediently pot-shaped, while the sheet metal of the casing part 24 is bent into a hollow cylinder, the sheet metal edges abutting one another on the division 27. So that the tubular part 24 holds together, a closure is provided. For this purpose, dovetail-shaped projections 29 are formed on the one sheet metal edge, which engage in a form-fitting manner in matching dovetail-shaped receptacles 28 of the other sheet metal edge.

The jacket part 24 and the lower part 25 are arranged coaxially with respect to the central axis 1. The jacket part 24 is preferably axially about three times longer than the lower part 25. The lower part 25 is slightly smaller in diameter than the jacket part 24, so that a step 45 is formed. In the area of this gradation, the jacket part 24 and the lower part 25 can have further connections, for example laser welding, in particular in addition to the joint material connection opposite the division 27.

In the bottom part 26 of the lower part 25 there is the coaxial passage 44, which is delimited by a 180 degree bend, which is formed in that the bending part 35, which initially extends in the direction of the center axis 1 during manufacture, by 180 Degree in the direction of the outer wall of the lower part 25 is bent such that it lies tightly parallel on the side of the base part 26 facing the jacket part 24, as a result of which the latter is twice as thick as the other wall areas of the outer core 17.

The in the FIG. 10 to 14 outer core 46 shown consists of two merged individual parts, namely the lower part 47 and the shell part 48. The latter is stamped / bent from a sheet metal to a hollow cylinder which has a closure on the division 27 by the preferably dovetail-shaped Projections 29 in the matching swallow Tail-shaped receptacles 28 engage positively. In addition, dovetail-shaped recesses 49 are formed on the lower edge region of the jacket part 48.

The pot-shaped lower part 47 is also advantageously produced from a sheet metal by the punching / bending process. It has a cylindrical lower part which is somewhat smaller in diameter than the jacket part 48, and a conical part which widens towards the latter and on the upper edge of which dovetail-shaped connectors 50 are formed. These connectors 50 engage in the savings 49 on the lower edge of the jacket part 48, whereby a positive coupling is produced and a coaxial with respect to the central axis 1 is given.

The coaxial passage 44 located in the bottom part 26 of the lower part 47 is delimited by a 180 degree bend, the bent part 35 resting on the base part 261 of the bottom part 26. The bottom part 26 is thus twice as thick as the outer wall of the bottom part 47.

The FIG. 15 to 17 show three essential stages for the production of the lower part 47 of the outer core 46. In FIG. 15 shows a flat starting plate in which a through hole having the central axis 1 is already formed. The FIG. 16 shows that in a further step the bending part 35, which is in the manufacturing stage according to FIG. 15 still extends in the direction of the central axis 1, is bent by 180 degrees. This 180 degree bend is carried out in such a way that the bent part 35 rests in parallel on the base part 261 of the base part 26 of the starting plate. The FIG. 17 it can be seen that the outer wall of the lower part 47, which in the manufacturing stages according to FIG. 15 and 16 is still flat, is bent upwards by 90 degrees, as a result of which the lower part 47 is approximately pot-shaped. Due to the 180 degree bend, which delimits the passage 44, and the fact that the bend part 35 rests on the base part 261 of the base part 26, the latter is twice as thick as the curved outer wall of the lower part 47. During the production of the lower part 47, in particular between and / or during the various process steps, in particular forming steps, heating or heat treatment, in particular intermediate annealing, of the starting plate or of the lower part 47 can be carried out, in particular in order to avoid undesirable deformations, for example folds or cracks, to avoid.

The in the FIG. 18 to 20 shown outer core 51 forms with the inner core 19 and the separating ring 38 a coaxial with respect to the central axis 1 integral unit for the magnetic head 3, 3 ', 3 ". The outer core 51 itself, with the circular-cylindrical jacket part 24 ″, the lower part 25 ″ and the bottom part 26 ″, is a unitary unit that is made of the same material and can, for example, be machined from a molded body or a blank. The base part 26 ″ extends radially inwards in the direction of the central axis 1 and has an axial passage 44 ″. The lower part 25 ″ is somewhat smaller in diameter than the jacket part 24 ″ and can be inserted into a valve body 2 and preferably fixed in a press fit on its peripheral wall 7.

The round rod-shaped inner core 19 is penetrated by the coaxial channel 21, which adjoins the valve seat 22, which protrudes somewhat on the lower end face of the inner core 19. At the upper end of the channel 21, the media line connection 23 is formed.

The circular separating ring 38, which is made of a non-magnetizable material, is provided for the magnetic separation of the inner core 19 and the outer core 51. This separating ring 38 is positioned in the plane of the bottom part 26 'between it and the inner core 19, the outer circumferential surface of the separating ring 38 firmly against the inner wall surface of the bottom part 26' and the inner surface of the separating ring 38 against the outer circumferential surface of the inner core 19 , The separating ring 38 is hermetically sealed between the base part 26 'of the outer core 51 and the inner core 19, preferably by means of a press fit and / or materially, in particular by welding. The FIG. 20 reveals that the separator ring 38 is axially somewhat thinner than the bottom part 26 ', which in turn is about twice as thick as a circumference of the lower part 25'.

The FIG. 21 and 22 show a coaxial valve body 52 with respect to the central axis 1, which is made in one piece with the valve chamber housing 53, the smaller-diameter media connection 54 and the media valve seat 55 from a single sheet of metal using the deep-drawing / forming process. In the transition area from the media connection 54 to the Ventilkammerge housing 53, an annular groove 57 is provided for receiving an annular seal. For the inlet 58 of the medium, there is a media tube 59 coaxially in the media connection 54, which extends into the valve chamber 60 and here has the media valve seat 55 at its end. The outputs 61 for the medium are arranged in the bottom 62 of the cup-shaped valve chamber housing 53.

The in the FIG. Plate anchor 11 shown in FIGS. 23 and 24 is designed with the armature disk 12, the disk spring 13 and the sealing body 14 coaxially as a structural unit with respect to the central axis 1. The frustoconical sealing body 14 is preferably made of an elastomer and is mounted in a conical bore of the metallic armature plate 12, the lower sealing surface 15 facing the disc spring 13 being larger in diameter than the axially opposite second sealing surface 16. The lower sealing surface 15 and the underside the armature plate 12 form a common plane, and the second sealing surface 16 and the top of the armature plate 12 are in one and the same plane.

The disk spring 13 consists of a spring plate and is preferably attached to the underside of the armature disk 12 by means of spot welding. On

Hole edge 63, which delimits a central hole in the disc spring 13, engages under an edge region of the sealing surface 15 of the sealing body 14. The actual disc spring force is achieved by approximately radially and / or circumferentially aligned spring webs 64, which are in the area between the central hole edge 63 and the outer edge 17 and are laterally delimited by recesses 65. The spring bars 64 are preferably of spiral design and / or arranged. Are alternative or additional the spring bars 64 are preferably meandering and / or arranged. The outer edge 17 extends beyond the armature disk 12 and preferably has six protruding support bearings 66. The armature disk 12 expediently has three media passages 67 which are arranged at equal intervals from one another and are formed in the region above the recesses 65 of the disk spring 13.

The in the FIG. 25 and 26 shown plate anchor 11 is executed except for a detail as in the embodiment of FIG. 23 and 24, so that the same description applies to the same parts. Only the sealing body 14 'additionally has an extension 68 integrally molded with the same material and with the sealing surface 15', which is mounted in the hole of the disk spring 13 delimited by the hole edge 63 and slightly protrudes the latter on the underside facing away from the armature disk 12.

The FIG. 27 and 28 show a plate anchor 11 ", which is similar to the exemplary embodiment from FIG. 23 and 24 and thus the same description applies to the same parts. However, a seal holder 69 is provided here, in which a sealing body 14 “with a sealing surface 15“ is mounted, the sealing surface 15 “being overlapped by a flange 70 of the seal holder 69 in some areas - in an outer edge region. A rivet pin 72 arranged on a base wall 71 of the seal holder 69 passes through the disk spring 13 ″ and is fixed with a rivet collar 73 in a depression 74 of the armature disk 12 ″. The disk spring 13 'is firmly clamped between the base wall 71 and the underside of the armature disk 12 ".

The FIG. 29 and 30 disclose a plate anchor 11 which is similar to the embodiment of FIG. 23 and 24 is executed. Therefore, the same description applies to the same parts. The sealing body 14 '"has a sealing bolt 75 which overlaps the disk spring 13" on the underside, a bearing part 76 which penetrates the disk spring 13 "and projects into the armature disk 12'" and a collar 77 provided in an upper-side depression of the armature disk 12 "" , The disc spring 13 "is fixed between the sealing bolt 75 and the underside of the armature disc 12". A Extended claw part 78 of the armature disk 13 '"passes through the disk spring 13" and engages in the sealing bolt 75. The second sealing surface 16 'opposite the sealing surface 15'"of the sealing bolt 75 forms a common plane with the upper side of the armature disk 12 '".

Claims

Expectations

1. Valve for gaseous or liquid media, comprising a valve body (2,

52) with an inlet (8, 58), an outlet (10, 62), a valve chamber (5, 60) and a media valve seat (9, 61), a plate anchor (11, 11 ', 11 “, 11) with one Armature disk (12, 12 ', 12 ", 12'"), a disk spring (13, 13 ', 13 ") and a sealing body (14, 14'. 14". 14 '") with a sealing surface (15) for sealing System on the media valve seat (9, 61), and a magnetic head (3, 3 ', 3 ") with an electro-coil (30) and an inner core (19,) and an outer core (20, 46, 51), between which one is not magnetisable separation is provided, the outer core (20, 46, 51) of the magnetic head (3, 3 ', 3 ") having a jacket part (24, 24', 48) comprising the electrocoil (30), a lower part (25, 25 ', 47) and one of the plate anchors (11, 11', 11 ", 11" ') facing the electrical coil (30) under the bottom part (26, 26') forming a structural unit, characterized in that the jacket part (24, 48), the lower part (25, 47) and the bottom part (26) of the outer core (20, 46) of the magnetic head (3, 3 ', 3 ") are formed from sheet metal.

2. Valve according to the preceding claim 1, characterized in that the outer core (20, 51) with the jacket part (24, 24 '), the lower part (25, 25') and the bottom part (26, 26 ') in one piece, preferably of the same material , is trained.

3. Valve according to one or more of the preceding claims, characterized in that the jacket part (48) of the outer core (46) and the lower part (47) with the bottom part (26) are assembled as separate parts to the Bauein unit.

4. Valve according to one or more of the preceding claims, characterized in that the jacket part (24, 48) of the outer core (20, 46) has a division (27) and is joined to it.

5. Valve according to one or more of the preceding claims, characterized in that the jacket part (24, 48) of the outer core (20,46) on the division (27) has at least one closure.

6. Valve according to one or more of the preceding claims, characterized in that the closure of the jacket part (24, 48) has at least one projection (29) engaging in a receptacle (28).

7. Valve according to one or more of the preceding claims, characterized in that the jacket part (48) and the lower part (47) of the outer core (46) are connected via at least one coupling.

8. Valve according to one or more of the preceding claims, characterized in that the coupling of the outer core (46) has at least one connector (50) engaging in a recess (49).

9. Valve according to one or more of the preceding claims, characterized in that the thickness of the base part (26, 26 '') is approximately twice as large as a thickness of a peripheral wall of the lower part (25, 25 ', 47).

10. Valve according to one or more of the preceding claims, characterized in that the bottom part (26) of the lower part (25, 47) defines an imaginary floor plane, the bottom part (26) being a bending part (35) arranged parallel to the imaginary floor. having.

11. Valve according to one or more of the preceding claims, characterized in that the bending part (35) on the side facing the electro-coil (30) of the bottom part (26) is arranged.

12. Valve according to one or more of the preceding claims, characterized in that the lower part (25, 25 ', 47) of the outer core (20, 51) with the peripheral wall and the bottom part (26, 26') in one piece, in particular is made of the same material, preferably pot-shaped, an axial passage (44, 44 ') being formed in the base part (26, 26').

13. Valve according to one or more of the preceding claims, characterized in that the valve body (52) with a cup-shaped valve chamber housing (53), a media connection (54) and the media valve seat (55) is formed in one piece from a sheet, in particular of the same material.

14. Valve according to one or more of the preceding claims, characterized in that the media valve seat (55) is formed on a media tube (59) integrally formed on the media connection (54) and penetrating it axially.

15. Valve according to one or more of the preceding claims, characterized in that the magnetic head (3, 3 ', 3 ") and the valve body (2, 52) with a media connection (54) with respect to a central axis (1) are rotationally symmetrical ,