Electromagnetically actuated valve with sealing body

Description

[0001] The invention relates to an electromagnetically actuated valve according to claim 1. Such valves are typically used to switch a flow of fluids, such as gases or liquids. A sealing element, which is optionally pressed against a valve seat, is typically used for this purpose. Typical sealing elements can be sealing nipples, which are sometimes movably mounted relative to another component, but due to their elastic material, they have poor guiding properties, which can lead to leakage or adverse switching behavior. Typical sealing elements can also include a pilot bore; however, this bore must have a small diameter, as otherwise a reliable sealing function cannot be guaranteed. Typical sealing elements, if they are themselves movably mounted relative to another component, also exhibit high wear.

[0002] A valve according to the preamble of claim 1 is known, for example, from DE 102015221423 A1.

[0003] The object of the invention is therefore to propose a valve which overcomes the problems of the prior art, in particular having an improved sealing agent.

[0004] The main features of the invention are specified in claim 1. Embodiments are the subject of claims 2 to 10.

[0005] According to the invention, an electromagnetically actuated valve is therefore proposed, which is penetrated by a central longitudinal axis, comprising a valve body in which an inlet and an outlet are formed, a valve seat which encloses a main nozzle and is arranged in a valve part flow-wise between the inlet and the outlet, an armature which is arranged to be movable linearly along the central longitudinal axis, a coil which can be selectively energized to generate a magnetic field for moving the armature along the central longitudinal axis, a preloading device, the valve part, a sealing element in the valve part, wherein a pilot bore is arranged in the sealing element and which is adjustably arranged in the valve part for linear movement along the central longitudinal axis between a closed position and an open position, wherein the sealing element and the armature are movable relative to each other within limits, a pilot bore sealing compound,which is movable with the armature for closing the pilot bore in a closed position or opening the pilot bore in a released position, wherein in the closed position the sealing element closes the main nozzle in such a way that only the pilot bore can connect the inlet and outlet, and in the open position the sealing element is spaced away from the valve seat, wherein the preloading device exerts a force on the armature which preloads it into a rest position in which the armature transmits the force to the pilot bore sealant, wherein the force presses the pilot bore sealant into the closed position, wherein the armature has a driving element which, when the armature moves from the rest position to an intermediate position after reaching the released position of the pilot bore sealant, engages with the sealing element.and wherein, upon further movement of the anchor from the intermediate position, the driving element moves the sealing body from the closed position to the open position, the sealing body comprising a base body and at least one sealing ring made of a different material, wherein the sealing ring rests against the valve seat in the closed position.

[0006] The valve has a valve seat that surrounds a main jet and is positioned within the valve body between the inlet and outlet. The main jet is typically an opening or section within the valve body through which fluid should only flow when the valve is open.

[0007] The valve part is arranged within the valve body as a separate component and can be sealed against it. The valve part is positioned in the fluid path between the inlet and outlet and is stationary relative to the valve body. The valve part accommodates the sealing element, preferably exclusively. Providing a separate valve part from the valve body, which forms the valve seat, reduces the geometric complexity of the valve body and lowers its manufacturing costs. Furthermore, this allows for the creation of a modular system in which the same valve body can be combined with different valve parts depending on the requirements.

[0008] The valve has an armature that is arranged within the valve body for linear movement along a spatial direction or the central longitudinal axis. This typically means that the armature can move linearly along an axis between two predefined end positions. A spatial direction can correspond to a combination of one direction and its exact opposite direction. In other words, the armature can move one-dimensionally along the central longitudinal axis defined in the valve body. Movement perpendicular to this spatial direction is not intended, which does not preclude the existence of a certain amount of play due to technical reasons.

[0009] The valve has a coil which, when an electric current flows through it, generates a magnetic field to move the armature along its spatial axis or central longitudinal axis. This allows the armature to be actively moved, and typically, by reversing the polarity, forces can be generated in both possible directions.

[0010] The valve has a sealing element comprising at least one sealing ring, which is arranged within the valve body for movement only linearly along the spatial direction or central longitudinal axis between a closed and an open position. The sealing element and the armature are movable relative to each other, preferably within limits. The sealing element is thus also movable along the same spatial direction as the armature. Movement of the sealing element transverse to the spatial direction or central longitudinal axis is also not permitted. Here, too, a certain amount of play is not excluded. However, preferably, a movement of the sealing element that is as precisely linear as possible is achieved. The sealing element can be guided over its outer circumferential surface, preferably by the valve part. This ensures tilt-free guidance and a reliable seal by the at least one sealing ring.

[0011] In the closed position, the sealing element, with its sealing ring, seals the main jet so that only the pilot bore in the sealing element connects the inlet and outlet. In the open position, however, the sealing element is spaced away from the valve seat. This means that in the closed position, the sealing element essentially seals the main jet, allowing fluid to flow between the inlet and outlet, or pressure equalization to occur, only through the pilot bore, if at all. In the open position, the valve is typically open, allowing for pressure equalization between the inlet and outlet and a corresponding flow of fluid.

[0012] The preloading device exerts a force on the armature, which preloads it into a rest position. In this rest position, the armature transmits the force to the pilot bore sealant, which presses the sealing element into the closed position, thus sealing the pilot bore. The rest position corresponds to the position the armature assumes when no magnetic field generated by the coil is exerting a force on it. The preloading device ensures that the armature assumes this rest position in such a case. In the rest position, the armature transmits the force mediated by the preloading device to the sealing element, pressing the sealing ring against the valve seat and effectively sealing the main nozzle.When the armature assumes its rest position, it also closes the pilot bore, so that ultimately no fluid flow and no pressure equalization between inlet and outlet are possible, as this is prevented by the pilot bore sealant in the installed position and the armature.

[0013] The armature features a drive element which, when the armature moves from its rest position to an intermediate position after the pilot bore opens, engages with the sealing element. In this intermediate position, the pilot bore is open, allowing pressure equalization between the inlet and outlet, but not yet a significant flow rate. However, this pressure equalization facilitates the subsequent removal of the sealing ring from the valve seat.

[0014] As the armature moves further from the intermediate position, the drive element moves (pulls or pushes) the sealing element from the closed position to the open position. This movement typically takes the armature even further away from the valve seat than in the intermediate position. This allows the armature to actively move the sealing element, thus actively removing it from the valve seat, which is equivalent to opening the valve. The pressure equalization already achieved by opening the pilot port significantly facilitates the opening of the main nozzle, as considerably smaller pressure differentials need to be overcome.

[0015] The valve according to the invention ensures that the at least one sealing ring, acting as the sealing element, does not experience friction-induced wear, since it does not have to guide itself but is supported by the base body of the sealing element and is movable with it. The guiding function during movement is now exclusively performed by the base body of the sealing element. This also results in improved switching and sealing performance.

[0016] The valve according to the invention also makes it possible to use a large pilot bore diameter. The sealing ring, which acts as a sealing element for the main nozzle itself, can be designed without a pilot bore, while the pilot bores can be formed in the base body of the sealing element. By integrating the pilot bore into the sealing element, it is possible to make the sealing diameter of the pilot bore smaller than would be the case if the pilot bore were located on a mating component.

[0017] The valve according to the invention also ensures that the sealing ring is held precisely by the sealing body and positioned with corresponding precision when it comes into contact with the valve seat. This prevents the sealing ring from coming into contact with the valve seat at different points during successive closing operations due to any play in the components. The valve according to the invention ensures that the sealing ring does not come into contact with the valve seat at different points, thus preventing unwanted leakage.

[0018] According to one possible embodiment of the valve according to the invention, the at least one sealing ring can be arranged on the end face, preferably exclusively on the end face, of the base body. This avoids circumferential friction on the sealing ring and allows the base body to transmit the actuating force of the preloading device linearly.

[0019] According to one possible embodiment of the valve according to the invention, the at least one sealing ring can be flat. Since the at least one sealing ring itself has only a sealing function, it does not need to be adapted for other purposes (fulfilling a guiding function or accommodating the pilot bore). The extent or thickness of the at least one sealing ring in the direction of the central longitudinal axis can therefore be in the range of 1 mm to 6 mm.

[0020] According to one possible embodiment of the valve according to the invention, the pilot bore sealant can be a separate element from the armature. The two elements are then designed as two parts. This allows manufacturing costs to be reduced by decreasing the geometric complexity.

[0021] According to one conceivable embodiment of the valve according to the invention, the pilot bore can be designed as a bore through the base body that is transverse or angled, in particular perpendicular, to the main jet. The main jet is defined as an opening surrounded by the valve seat. It is conceivable that the pilot bore and the at least one sealing ring are aligned coaxially with each other. If two sealing rings are present, preferably both sealing rings are aligned coaxially with the pilot bore. This allows for a linear flow through the pilot bore from the main jet that is as free of turbulence as possible.

[0022] According to one possible embodiment of the valve according to the invention, the pilot bore can be arranged centrally with respect to the main nozzle and / or with respect to the sealing ring and / or with respect to the base body. This results in a simple and as symmetrical a shape as possible, which avoids asymmetries and is easy to manufacture.

[0023] According to one possible embodiment of the valve according to the invention, at least one opening can be formed circumferentially in the base body and / or the valve part, which, in the intermediate position, forms a fluidic connection between the inlet and the main jet and / or between the outlet and the main jet. This opening(s) ensures, in particular, that rapid pressure equalization can occur when the pilot bore is open. This allows the aforementioned pilot function to be advantageously implemented, since an explicit passage for the fluid to be controlled is provided, even if the sealing element has not yet moved from the closed position. However, when the armature is in its rest position, as already mentioned, it seals the pilot bore, so that no fluid flow through the pilot bore is possible.

[0024] According to one possible embodiment of the valve according to the invention, the sealing element can be designed and / or arranged such that the base body, at least in the open position and preferably also in the closed position, is free from contact or circumferential contact with a nozzle holder having the main nozzle, or is free from an arrangement encompassing the main nozzle. This allows the fluid to bypass the sealing element, or flow around it, and does not have to flow through it.

[0025] According to one possible embodiment of the valve according to the invention, the valve part can be free of a nozzle holder or free of a tube on which the main nozzle is formed and which can be encompassed by the sealing body. The main nozzle is thus not formed on a tube that can form the valve seat at one longitudinal end and whose outer circumferential surface can provide a guide. Instead, the main nozzle can be formed in a flat area, thereby reducing the overall height.

[0026] According to one possible embodiment of the valve according to the invention, the armature or its armature base body can be free of a sealing edge which, in the rest position, serves to close the pilot bore. Since the pilot bore sealant performs this function, the armature or its base body can have a simple geometry.

[0027] According to one possible embodiment of the valve according to the invention, the sealing body or its base body can have a sealing edge on the pilot bore sealing surface. This sealing edge can, for example, be arranged coaxially to the pilot bore. It can be designed such that it completely surrounds the pilot bore in the rest position and thus prevents fluid exchange.

[0028] According to one possible embodiment of the valve according to the invention, the drive element can be designed as an anchor edge projecting radially inwards or outwards, and the sealing body preferably has a correspondingly projecting sealing body guide edge, wherein the anchor edge and the sealing body guide edge interlock. This enables simple and advantageous drive of the sealing body by the anchor during movement that leads from the intermediate position of the anchor even further away from the valve seat. Furthermore, simple manufacturing is facilitated, since the two edges can simply be clipped together. In the rest position, a longitudinal gap can be formed between the anchor edge and the sealing body guide edge.

[0029] According to one possible embodiment of the valve according to the invention, the preloading device can be designed as a compression spring, which is arranged between the armature and the magnetic core or another component of the valve that is rigidly connected to the valve body. This allows a compressive force to be exerted on the armature in a simple manner. However, other embodiments of a preloading device are also possible.

[0030] According to one possible embodiment of the valve according to the invention, a pole tube or a pole tube assembly can be arranged in the valve body, in which the armature is guided linearly. The pole tube can be formed from the core and an armature guide tube, which are integrally connected to each other, for example by welding, rolling, and / or bonding. This allows for the formation of a pole tube assembly that is easy to assemble. This also enables advantageous and precise linear guidance of the armature.

[0031] According to a further embodiment of the valve according to the invention, the base body can be made of a plastic, and the at least one sealing ring can be made of an elastic material and integrated into the base body. The base body can, in particular, be made of a high-temperature-resistant plastic, especially PEEK, PPA, PPS, PA, PSU, PES, or PEI. Filling with PTFE is conceivable to achieve a wide temperature range, universal chemical resistance, and good sliding and non-stick properties. The at least one sealing ring can, in particular, be an elastomer sealing ring or made of butyl, FKM, or EPDM.

[0032] There are numerous solutions for joining the base body to at least one sealing ring. Naturally, it is possible to manufacture the base body and sealing ring(s) as a single piece, and in so-called co-extrusion processes, for example, two different materials can be processed simultaneously. Furthermore, it is possible to join the base body and sealing ring(s) using other joining methods, such as bonding, vulcanizing, or welding.

[0033] At least one sealing ring is bonded to the base body by a material bond or vulcanized.

[0034] This eliminates the manufacturing costs of separately assembling the sealing ring and the base body and achieves a permanent connection. This ensures that both parts are securely and reliably joined. This is particularly advantageous in ensuring that the sealing ring does not move relative to the sealing body and thus makes contact with the valve seat as precisely and consistently as possible.

[0035] According to one possible embodiment of the valve according to the invention, the at least one sealing ring can be integrated into the base body on the outside. This allows the base body to be made smaller. The end face of the base body is located on the outside.

[0036] According to one conceivable embodiment of the valve according to the invention, the at least one sealing ring can have a single sealing surface which runs transversely to the central longitudinal axis.

[0037] According to one possible embodiment of the valve according to the invention, the valve part can be made of a plastic, including PEEK, PPA, PPS, PA, PSU, PES, and PEI. Filling with PTFE is also conceivable to achieve a wide temperature range, universal chemical resistance, and good sliding and non-stick properties.

[0038] According to a further embodiment of the valve according to the invention, the sealing element can be designed without a filter. This allows for a smaller design. It is conceivable that the valve part incorporates filters arranged in a fluid flow between the inlet and outlet. This prevents the ingress of dirt. The filter can, in particular, be designed as a mesh. This corresponds to a simple, durable, and effective design.

[0039] According to a further embodiment of the valve according to the invention, the sealing body can have a guide groove or a guide lug on its outer circumference, and the valve part can have the other element of the guide groove and guide lug on its inner circumference, wherein the guide groove and guide lug extend parallel to the central longitudinal axis and interlock to form a guide connection. The guide connection can be designed to be free of play or with minimal play, or it can form a floating bearing. This allows the sealing body to be guided with particular precision relative to the valve seat.

[0040] The sealing element is guided longitudinally by a guide groove or guide lug, which is arranged or distributed circumferentially, preferably equidistantly, on the outer surface of the sealing element, and a corresponding guide groove or guide lug, which is / are arranged on the inner circumference of the valve part. This advantageous guidance of the sealing element ensures that the sealing element always rests on the valve seat with the same annular surface. This prevents any misalignment between the valve seat and a groove that may be incorporated into the sealing ring by the valve seat. Such misalignment could lead to valve leakage.

[0041] According to one possible embodiment of the valve according to the invention, the guide groove(s) and / or guide nose(s) extend only to one side of the main nozzle and do not pass through it in the direction of the central longitudinal axis. Because the guide connection is only above or only to one side of the main nozzle, the flow path of the medium is not impaired, since in the open position it does not pass through the sealing body, but bypasses it.

[0042] According to one possible embodiment of the valve according to the invention, the valve can have several guide connections which are arranged equidistantly around the central longitudinal axis. This allows for uniform guidance.

[0043] According to a further embodiment of the valve according to the invention, the armature can have a sealing nipple with a flat or conical sealing surface on the sealing body side, serving as a pilot bore sealing element. The armature or its armature base thus has a separate component for sealing. The two parts can therefore be made of different materials, which is advantageous if the sealing nipple is to be made of a non-magnetic material, for example, an elastomer. A flat sealing surface is particularly suitable for contact with a sealing edge, and a conical sealing surface is particularly suitable for contact with a sealing opening.

[0044] According to a further embodiment of the valve according to the invention, the sealing nipple can either be guided by a sealing nipple holder rigidly connected to the armature or be directly rigidly connected to the armature. It is conceivable that the armature and sealing nipple are relatively immobile relative to each other in order to enable the best possible sealing of the pilot bore. The sealing nipple holder can be a substantially cylindrical guide cage that fixes or clamps the sealing nipple in the axial and / or radial direction. The sealing nipple holder can be, for example, crimped or welded to the armature. The sealing nipple holder can have a contact flange with which it rests against the armature to secure its relative position to the armature. However, the sealing nipple itself can also be, for example, crimped or welded to the armature.

[0045] According to a further embodiment of the valve according to the invention, the sealing nipple can be made of a metal or an elastic material, for example an elastomer or of butyl, FKM, or EPDM. This allows for a reliable and fluid-tight system. If the sealing nipple is made of a metal, the corresponding opposing contact surface should have an elastic material, for example an elastomer or butyl, FKM, or EPDM. It is also conceivable that both the sealing nipple and its contact surface have such an elastic material.

[0046] According to a further embodiment of the valve according to the invention, the sealing body can have a second sealing ring which interacts sealingly with the pilot bore sealant in its contact position. The two sealing rings can be arranged on opposite sides or end faces of the sealing body. This allows the elastic elements to be relocated within the sealing body, which can simplify manufacturing.

[0047] According to a further embodiment of the valve according to the invention, the two sealing rings can be formed in one piece. The two sealing rings can thus be made of a single material. This is possible, for example, by the fact that the base body of the sealing element has a channel penetrating it, which connects the two sealing rings. The sealing rings can be manufactured, for example, by injection molding or vulcanization with the sealing element in a simple manner.

[0048] According to a further embodiment of the valve according to the invention, the sealing body can have a stroke limiting means on the armature side, which limits the stroke of the pilot bore sealant. Particularly when a sealing nipple with a conical sealing surface is provided, which sometimes penetrates into the pilot bore, the stroke limiting means can limit the penetration depth and protect the associated contact surface from excessive forces.

[0049] It is conceivable that in the rest position, the pilot bore sealant forms or limits a cavity together with the stroke limiting device, which serves as a receiving space for displaced material of a sealing ring.

[0050] According to one conceivable embodiment of the valve according to the invention, the base body of the sealing element can have a disc section and ring segments projecting longitudinally from it. Openings can be arranged between adjacent ring segments to facilitate fluid flow. It is conceivable that at least one of the ring segments has one of the aforementioned openings. It is conceivable that at least one of the ring segments has a guide groove or a guide lug on its outer circumference. It is conceivable that the sealing element guide edge is arranged on the ring segments with openings, as this avoids undercuts that are difficult to manufacture. For example, in a multi-part injection mold for the base body, a molded part can be provided to form an opening, which also forms the sealing element guide edge and can be pulled radially out of the base body after completion.

[0051] According to one possible embodiment of the valve according to the invention, it can include a linear magnet. The linear magnet serves to adjust the armature 30. The linear magnet can comprise at least the armature, the coil, the magnetic core, the preload device, and the armature guide tube.

[0052] Further features, details and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. The drawings show: Fig. 1 a longitudinal sectional view through a valve of the first embodiment according to the invention in a first state, Fig. 2 a detail according to Fig. 1 in a second state, Fig. 3 a section according to Fig. 1in a third state, Fig. 4 a perspective view of a sealing body of first embodiment, Fig. 5 a longitudinal sectional view of a valve part of first embodiment, Fig. 6 a longitudinal sectional view through a valve of second embodiment according to the invention in a first state and Fig. 7 a longitudinal sectional view of a sealing body of second embodiment.

[0053] In the figures, identical or corresponding elements are designated with the same reference numerals and are therefore not described again unless expedient. Features already described are not described again to avoid repetition and are applicable to all elements with the same or corresponding reference numerals, unless explicitly excluded. The disclosures contained in the entire description are transferable analogously to identical parts with the same reference numerals or component designations. Furthermore, the positional designations chosen in the description, such as top, bottom, side, etc., refer to the directly described and illustrated figure and must be applied analogously to any new position.Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

[0054] Starting from a central longitudinal axis A, a radial direction R extends, a circumferential direction U extends around the central longitudinal axis A, and a transverse median plane Q is arranged such that its normal vector lies on the central longitudinal axis A.

[0055] Fig. 1Figure 1 shows an electromagnetically actuated valve 5 according to a first embodiment of the invention in a first state (closed position). The valve 5 has a valve body 10. An inlet 6 and an outlet 7 are formed in the valve body 10. A fluid to be controlled, for example hydrogen, can flow in through the inlet 6. When the valve 5 is open, this fluid should exit through the outlet 7, whereas when the valve 5 is closed, it should not exit through the outlet 7. The valve body 10 comprises a valve part 70, which is arranged in the fluid flow between the inlet 6 and the outlet 7 and is sealed against the valve body 10 by means of seals 148.

[0056] Within and formed within the valve part 70 is a valve seat 20. This valve seat 20 surrounds a main jet 25. The valve seat 20 and the main jet 25 are defined by a sealing edge 124, which is formed within the valve part 70.

[0057] In the plane of the image above the valve seat 20, a linear magnet 126 with a housing 128 is arranged, comprising an armature 30. The armature 30 is movably mounted linearly along the central longitudinal axis A in an armature guide tube 156.

[0058] The linear magnet 126 also has a coil 40 which at least partially surrounds the armature 30 and is designed to generate a magnetic field by means of which the armature 30 can be moved along its spatial direction or the central longitudinal axis A. In the plane of the image above the armature 30, a preload device 50 in the form of a compression spring is also arranged, which is supported at one end by the armature 30 and presses the armature 30 downwards in the plane of the image towards the valve seat 20. The preload device 50 is supported at the other end by a magnetic core 55, which is fixedly connected to the housing 128, which is fixedly connected to the valve body 10. The magnetic core 55 is also integrally connected to the armature guide tube 156 to form a pole tube assembly.

[0059] A sealing element 60 is arranged in the valve part 70 between the valve seat 20 and the armature 30. The sealing element 60 comprises a base body 102 and a sealing ring 104, which is integrated into the base body 102. A pilot bore 65 is arranged centrally in the base body 102, which projects vertically through the sealing element 60 along the central longitudinal axis A.

[0060] The sealing element 60 is in the valve part 70 for linear movement along the central longitudinal axis A between a closed position ( Fig. 1 ) and an open position ( Fig. 3 The sealing element 60 is adjustable. It rests against the inside of the valve part 70 and is guided by it along the spatial direction already mentioned with reference to the anchor 30; that is, the sealing element 60 can only move linearly along this spatial direction. For this purpose, the sealing element 60 is guided without play in the valve part 70.

[0061] The design described above ensures that the sealing element 60 can only move linearly along the spatial direction with respect to the valve seat 20. This also ensures, in particular, that the sealing element 60 always engages with the valve seat 20 at the same point.

[0062] In Fig. 1 The anchor 30 is shown in its rest position and the sealing element 60 assumes a closed position. The anchor 30 has a pilot bore sealant 108 in the form of a sealing nipple 110 with a flat sealing surface 134, which is movable with it and serves to close the pilot bore 65 in a contact position ( Fig. 1 ) or releasing the pilot bore 65 in a release position ( Fig. 2) serves, wherein in the closed position the sealing element 60 closes the main jet 25 in such a way that only the pilot bore 65 can connect inlet 6 and outlet 7, and in the open position the sealing element 60 is spaced apart from the valve seat 20. The sealing nipple 110 is fixed in a sealing nipple holder 112 which is firmly connected to the core 30. Without the contact of this pilot bore sealant 108, the illustrated state of the Fig. 1 Fluid flow between inlet 6 and outlet 7 is only possible through the pilot bore 65. Due to the presence of the pilot bore sealant 108, this fluid flow is also no longer possible, so that the valve 5 is in the state shown. Fig. 1 is completely sealed.

[0063] The anchor 30 has a drive element 35, which is designed as a projecting anchor edge 78. Complementing this, the sealing body 60 has a circumferential sealing body guide edge 77. In the closed and rest positions, a longitudinal gap is formed between them in the direction of the central longitudinal axis.

[0064] The functionality of valve 5 is now described with reference to the Figs. 1 to 3 described, whereby the Fig. 2 and 3 each an excerpt from the in Fig. 1 The depicted valve 5 shows the valve.

[0065] In the state of Fig. 1 As already mentioned, the pilot bore sealant 108 of the armature 30 rests against the sealing body 60 in such a way that the pilot bore 65 is closed. Since the sealing body 60 simultaneously closes the valve seat 20 or the main jet 25, the valve 5 is closed and there is no fluid flow between the inlet 6 and the outlet 7.

[0066] The guide element 35 and the sealing body guide edge 77 are vertically spaced apart. A radial clearance can also be provided between the anchor 30 and the sealing body 60, which simplifies manufacturing and does not interfere with the operation of the valve 5.

[0067] Fig. 2The figure shows a state in which the armature 30 has been moved slightly upwards in the plane of the image, or towards the magnetic core 55, due to an applied magnetic field, up to an intermediate position of the armature 30. In this position, the two projecting edges 77, 78 are in contact with each other, but the sealing element 60 has not yet moved. Due to the upward displacement of the armature 30, the pilot bore 65 is opened, as the pilot bore sealant 108 has moved away from the sealing element 60 and the pilot bore 65 opens. This allows pressure equalization between the inlet 6 and outlet 7, which significantly facilitates the subsequent removal of the sealing element 60 and its sealing ring 104 from the valve seat 20.

[0068] The sealing body 60 has a number of openings 130 around its circumference, which in the intermediate position form a fluidic connection between the inlet 6 and the main jet 25. The valve part 70 also has a number of openings 132 around its circumference, which in the intermediate position form a fluidic connection between the inlet 6 and the main jet 25.

[0069] In Fig. 3 The anchor 30 was moved even further in the image plane or in the direction of the magnetic core 55 than in the Fig. 2The intermediate position shown is moved away from the valve seat 20 and is now in an upper end position. An open position has been reached. Due to the engagement between the two projecting edges 77, 78, the sealing element 60 was pulled upwards in the same spatial direction. This removed the sealing element 60 and its sealing ring 104 from the valve seat 20. Simultaneously, the entire sealing element 60 is now in a position distanced from the main jet 25, such that the fluid flow bypasses the sealing element and allows a fluidic connection from the inlet 6 to the main jet 25 and then to the outlet 7, but with the sealing element 60 removed. This significantly increases the flow cross-section, enabling advantageous large-volume fluid exchange.

[0070] Will be from the in Fig. 3In the depicted state, for example, if the current flowing in the coil 40 is switched off, the preloading device 50 pushes the armature 30 downwards in the plane of the image, i.e., towards the valve seat 20. This causes the armature to engage with the sealing element 60 again, pressing it and its sealing ring 104 onto the valve seat 20 in the same direction. Thus, the valve 5 is closed again, and the current flowing in the coil 40 is restored. Fig. 1 The depicted state (closed position) has been assumed.

[0071] The following section describes individual aspects of valve 5 in more detail, particularly in light of the Fig. 4 and 5 .

[0072] The sealing ring 104 is arranged exclusively on the end face of the base body 102 and integrated into it. The sealing ring 104 is flat and extends from 1 mm to 6 mm in the direction of the central longitudinal axis A. The pilot bore sealant 108 is a separate element from the armature 30. The pilot bore 65 is designed as a bore through the base body 102, perpendicular to the main jet 25. The pilot bore 65 is centrally located with respect to the main jet 25, the sealing ring 104, and the base body 102. Viewed together, the Figs. 1 to 3 It becomes particularly clear that the sealing body 60 is designed and / or arranged in such a way that its base body 102 is in the open position ( Fig. 3 ) and also in the closed position ( Fig. 1), is free from any attachment or circumferential attachment to a nozzle holder that has the main nozzle, or is free from any arrangement encompassing the main nozzle 25. The main nozzle 25 is not arranged on a pipe or a nozzle holder, but rather is formed in a flat area. Since the anchor includes the separate pilot bore sealant 108, its anchor base body 138 is free from a sealing edge which, in the rest position, serves to close the pilot bore 25. Fig. 4Figure 1 shows that the sealing body 60 or its base body 102 has a sealing edge 146 on the pilot bore sealant side. This sealing edge 146 can, for example, be arranged coaxially with the pilot bore 65. It can be designed such that it completely surrounds the pilot bore 65 in the rest position, thus preventing fluid exchange. The base body 102 and the sealing ring 104 are made of different materials. The base body 102 is designed as a plastic part, in particular as an injection-molded plastic part, and the sealing ring 104 is designed as a vulcanized-on elastomer part. The sealing ring 104 is integrated into the base body 102 on its outer end face. The sealing ring 104 has a single sealing surface 134, which runs transversely to the central longitudinal axis A. The sealing body 60 is filter-free, i.e., it does not include a filter element. A filter function is performed by the valve part 70.The valve part 70 has a filter 140, which is arranged in the fluid flow between inlet 6 and outlet 7. The filter 140 covers the openings 132.

[0073] The Fig. 4 and 5Figure 1 shows parts of a guide connection 122. The sealing body 60 has one or more guide grooves 114 on its outer circumference, and the valve part 70 has a corresponding number of guide lugs 116 on its inner circumference. The guide groove 114 and guide lug 116 extend parallel to the central longitudinal axis A and interlock to form a guide connection 122. The guide connection 122 can be designed to be free of play, have minimal play, or form a floating bearing. It is evident that the guide groove(s) 114 and guide lug(s) 116 extend only to one side of the main jet 25 and do not pass through it in the direction of the central longitudinal axis A. The sealing body 60 can therefore only be positioned as far as the main jet 25, but not beyond it, for example, by gripping the main jet 25.The sealing nipple holder 112 has a mounting flange 150 with which it rests against the anchor 30 to secure the relative position to the anchor 30.

[0074] The base body 102 of the sealing element 60 has a disc section 142, which is centrally penetrated by the central longitudinal axis A. Ring segments 144 project longitudinally from this section. The longitudinal direction runs along the central longitudinal axis A. Between adjacent ring segments 144, openings 72 are arranged to allow fluid flow. In addition, every second ring segment 144 has one of the openings 130. These openings 72 and openings 130 allow fluid flow from the inlet 6 to the pilot bore 65 in the intermediate position, even when the sealing element 60 is in the closed position. This enables a particularly advantageous implementation of the pilot function mentioned above, since the openings 72 and openings 130 explicitly provide a passage for the fluid. As long as the sealing surface 134 is in contact with the sealing body 60, typically no fluid can flow through the pilot bore 65.

[0075] At least one of the ring segments 144 has a guide groove 114 on its outer circumference, wherein preferably one ring segment 144 has either an opening 130, a guide groove 114, or a guide lug 116. At least one of the ring segments 144 has a sealing element guide edge 77 on its inner circumference, wherein preferably the ring segment 144 has a sealing element guide edge 77 which has an opening 130. The sealing element guide edge 77 is arranged on the side of the corresponding opening 130 opposite the sealing edge 146.

[0076] Fig. 6 shows a valve 5 of a second version, where now only the differences to the first version ( Figs. 1 to 5) are to be described. Housings 10 and 128 are not shown. The sealing nipple 110 is now directly and firmly connected to the anchor 30 without the need for an intermediate sealing nipple holder. The sealing nipple 110 also has a conical sealing surface 136 instead of a flat sealing surface. The sealing body 60 has a second sealing ring 106, which seals against the pilot bore sealant 108 in its contact position. The two sealing rings 104, 106 are arranged on opposite sides of the sealing body 60 or its base body 102. The two sealing rings 104, 106 are formed in one piece. This is possible because the base body 102 has a channel 152 penetrating it, which connects the two sealing rings 104, 106. The second sealing ring 106 comes into contact with the rest position, which is in Fig. 6The conical sealing surface 136 of the pilot bore sealant 108 is shown for a tight seal. The sealing body 60 or its base body 102 has a stroke limiting element 118 in the form of a round collar 120 on the anchor side, which limits the stroke of the pilot bore sealant 108. The conical sealing surface 136 comes into contact with this collar. In the rest position, a cavity 154 forms between the pilot bore sealant 108 and the stroke limiting element 118, which serves as a receiving space for displaced material from the second sealing ring 106.

[0077] The main jet 25 differs from the others. Figs. 1 to 5 now formed in or on a pipe 27 formed by the valve part 70, which forms the valve seat 20 at one longitudinal end. Reference symbol list

[0078] 5 valve 130 opening 6 inlet 132 opening 7 Outlet 134 flat sealing surface 10 Valve body 136 conical sealing surface 20 valve seat 138 Anchor base body 25 Main jet 140 filter 27 Pipe 142 disc section 30 anchor 144 Ring segment 35 Carrying element 146 sealing edge 40 Sink 148 seal 50 Pre-tensioning device 150 Mounting flange 55 magnetic core 152 channel 60 Sealing body 154 cavity 65 Pilot drilling 156 Anchor guide tube 70 Valve part 72 Breakthrough A central longitudinal axis 77 Sealing element guide edge R radial direction 78 Anchor edge U Circumferential direction 102 basic body Q transverse median plane 104 sealing ring 106 sealing ring 108 Pilot hole sealant 110 sealing nipple 112 Sealing nipple holder 114 Guide groove 116 Leading nose 118 Parking space limiting device 120 round collar 122 Leadership connection 124 sealing edge 126 Linear magnet 128 Housing

Claims

1. Electromagnetically actuatable valve, which is penetrated by a central longitudinal axis (A), comprising - a valve body (10) in which an inlet (6) and an outlet (7) are configured, - a valve seat (20) which encloses a main nozzle (25) and is arranged in a valve part (70) in terms of flow between the inlet (6) and the outlet (7), - an armature (30) which is arranged so as to be movable in a linear manner along the central longitudinal axis (A), - a coil (40) which can be selectively energized for generating a magnetic field for moving the armature (30) along the central longitudinal axis (A), - a pretensioning device (50), - the valve part (70), - a sealing body (60) in the valve part (70), wherein a pilot bore (65) is arranged in the sealing body (60) and is arranged in the valve part (70) for moving in a linear manner along the central longitudinal axis (A) so as to be adjustable between a closed position and an open position, wherein the sealing body (60) and the armature (30) are movable in a defined manner relative to one another, - a pilot bore sealing means (108) which is movable with the armature (30) for closing the pilot bore (65) in a bearing position or releasing the pilot bore (65) in a released position, - wherein in the closed position the sealing body (60) closes the main nozzle (25) such that only the pilot bore (65) can connect the inlet (6) and outlet (7) and in the open position the sealing body (60) is spaced apart from the valve seat (20), - wherein the pretensioning device (50) exerts a force on the armature (30) which pretensions it into a resting position in which the armature (30) transfers the force to the pilot bore sealing means (108), wherein the force pushes the pilot bore sealing means (108) into the bearing position, - wherein the armature (30) has a driver element (35) which comes into engagement with the sealing body (60) when the armature (30) is moved out of the resting position into an intermediate position after the released position of the pilot bore sealing means (108) is reached, and - wherein with further movement of the armature (30) from the intermediate position the driver element (35) moves the sealing body (60) from the closed position into the open position, wherein - the sealing body (60) comprises a main body (102) and at least one sealing ring (104, 106) made of a material which is different therefrom, wherein the sealing ring (104) bears against the valve seat (20) in the closed position, characterized in that - the at least one sealing ring (104, 106) is connected or vulcanized to the main body (102) by a material connection.

2. Electromagnetically actuatable valve according to Claim 1, characterized in that the main body (102) is manufactured from a plastics material and the at least one sealing ring (104, 106) is manufactured from a resilient material and integrated in the main body (102).

3. Electromagnetically actuatable valve according to one of the preceding claims, characterized in that the sealing body (60) is configured without a filter.

4. Electromagnetically actuatable valve according to one of the preceding claims, characterized in that the sealing body (60) has a guide groove (114) or a guide lug (116) on the outer periphery and the valve part (70) has the respective other element of the guide groove (114) and guide lug (116) on the inner periphery, wherein the guide groove (114) and guide lug (116) extend parallel to the central longitudinal axis (A) and the guide groove (114) and guide lug (116) interlock to form a guide connection (122).

5. Electromagnetically actuatable valve according to one of the preceding claims, characterized in that the armature (30) has on the sealing body side a sealing nipple (110) with a planar or conical sealing surface (134, 136) as pilot bore sealing means (108).

6. Electromagnetically actuatable valve according to one of the preceding claims, characterized in that the sealing nipple (110) is guided either by a sealing nipple holder (112) fixedly connected to the armature (30) or is fixedly connected directly to the armature (30).

7. Electromagnetically actuatable valve according to one of the preceding claims, characterized in that the sealing nipple (110) is manufactured from a metal or a resilient material.

8. Electromagnetically actuatable valve according to one of the preceding claims, characterized in that the sealing body (60) has a second sealing ring (106) which cooperates sealingly with the pilot bore sealing means (108) in the bearing position thereof.

9. Electromagnetically actuatable valve according to one of the preceding claims, characterized in that the two sealing rings (104, 106) are configured in one piece.

10. Electromagnetically actuatable valve according to one of the preceding claims, characterized in that the sealing body (60) has on the armature side an adjusting path defining means (118) which defines an adjusting path of the pilot bore sealing means (108).