• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A solenoid valve (10) has a housing (12) comprising a first and a second housing part (14, 16), a flexible membrane (18) being arranged between the first and the second housing part (14, 16). A movably mounted actuating element (30) is provided which is connected to the diaphragm (18) and which, in an operating position of the first and second housing parts (16), removes the diaphragm (18) from a valve seat (26) when moving into an open position ) releases and when moving into a closed position presses the membrane (18) onto the valve seat (26). The first and second housing parts (14, 16) can assume a service position in which the membrane (18) is accessible. The membrane (18) is positively and non-destructively detachably connected to the actuating element (30) so that the membrane (18) can be removed from the actuating element (30) in the service position by releasing the interlocking and can be connected to the latter by establishing the interlocking. Furthermore, an assembly and a method for replacing a membrane (18) are proposed.
    公开号:CH717219A2
    申请号:CH00248/21
    申请日:2021-03-09
    公开日:2021-09-15
    发明作者:Bezold Christian；Ruck Theresa
    申请人:Buerkert Werke Gmbh & Co Kg；
    IPC主号:
    专利说明:

    The invention relates to a solenoid valve, in particular a diaphragm valve with which a fluid flow can be controlled, an assembly and a method for replacing a membrane.
    Diaphragm valves have the advantage that fluid-carrying areas of their housing can be divided off by an electromagnetic drive through the membrane in a simple manner, so that the drive and in particular a solenoid do not come into contact with the fluid.
    In a known construction, the membrane is clamped between two housing parts, while the surface of the membrane is movable. With regard to the strength and the thickness of the membrane, a compromise is often made in order to obtain, on the one hand, a high degree of mobility of the membrane and, on the other hand, sufficient stability and a long service life.
    The object of the invention is to increase the service life of a solenoid valve with a membrane.
    This object is achieved with a solenoid valve which has a housing comprising a first and a second housing part, a flexible membrane being arranged between the first and the second housing part. In the first housing part at least one fluid channel is formed with a valve seat that can be closed by the membrane, and a movably mounted actuating element is received in the second housing part, which is connected to the membrane and which is in an operating position of the first and the second housing part during movement in an open position releases the membrane from the valve seat and when moving into a closed position presses the membrane onto the valve seat. The housing is designed so that the first and the second housing part can assume a service position in which the first and the second housing part are separated from each other and in which the membrane is accessible, the membrane being non-destructively detachable connected to the actuating element and the membrane and the actuating element are designed such that the membrane can be removed from the actuating element and connected to it in the service position.
    With this design, the membrane can be easily exchanged so that the membrane can be designed as a wear part. It is thus possible to design the membrane for high mobility, for example, and to accept a shortened service life of the membrane. If the membrane is worn out, it can be exchanged easily and inexpensively for a new membrane, and the solenoid valve can still be used. The service life of the solenoid valve is therefore no longer limited by the service life of the membrane.
    This is, for example, also favorable for use of the solenoid valve in food production, for example in hot drinks machines.
    The membrane can in particular be replaced without tools. This means that the housing is also opened without tools, as is the replacement of the membrane. In this way, the change times can be kept short, which, for example, reduces the costs for maintenance work. Replacing only the diaphragm, but not the entire drive of the valve, of course, further reduces costs.
    The membrane is in particular non-destructive and detachable from the actuating element without tools. This is unusual because the mechanical connection has to transmit high forces when the valve is switched during operation. However, the use of a tool always harbors the risk of slight damage to the actuating element or the membrane. Furthermore, removing the membrane by means of a tool could also lead to the membrane tearing or the membrane being torn apart, so that small membrane fragments would still be present at the fastening point. This makes the removal of these fragments even more difficult and increases the risk of displacement or damage to the actuating element.
    The membrane is fastened to the actuating element in particular via a latching connection, i.e. the part of the latching connection that sits on the actuating element is reused.
    As with known solenoid valves, the membrane advantageously separates the fluid-carrying parts of the solenoid valve from a drive side. In this case, a control chamber that can be filled with fluid is formed between an inside of the first housing part and the membrane, while the actuating element is arranged on the side of the membrane facing away from the control chamber.
    As is customary with solenoid valves, the drive is an electromagnetic drive. For example, a plunger is provided which is moved by a magnetic coil of the drive and which is coupled to the actuating element in such a way that it moves it back and forth between the open position and the closed position.
    The actuating element is preferably designed as a rocker with two arms, the drive acting on one of the arms offset from the pivot axis of the rocker.
    In this case, by pivoting the actuating element, one of the arms is alternately raised and the other lowered, whereby an open position and a closed position of a valve seat assigned to one of the arms can be defined.
    The membrane is preferably essentially flat, so that it can be clamped at its peripheral edge between the two housing parts and can thus be fixed in a fluid-tight manner around the circumference. This arrangement also contributes to the fact that the membrane can be designed as an easily replaceable wear part.
    While the service position of the housing is defined so that the interior of the housing in which the membrane is arranged is accessible, the operating position describes the assembled state of the housing, in which the normal operation of the solenoid valve, so the pumping of fluid , is possible and in which the interior of the housing is enclosed by the two housing parts and thus the membrane is not accessible from the outside.
    For easier fastening of the membrane, at least one connecting section can be provided on the actuating element, which has a first fastening structure which can be positively connected to a complementary second fastening structure on the membrane.
    Preferably, at least one connecting section is provided on the actuating element symmetrically to the pivot axis of the rocker on both arms, so that the membrane can be connected to the actuating element at several points.
    The connecting section can be an integral part of the actuating element, but could also be designed as a separate, permanent and fixed component connected to the actuating element. However, it is always advantageous if the first fastening structure is rigid and not elastically deformable.
    The second fastening structure on the membrane is preferably made of the material of the membrane itself and is thus normally elastically deformable. The second fastening structure is advantageously already molded onto the membrane when it is manufactured.
    An ethylene-propylene-diene rubber (EPDM), for example, can be used as the material for the membrane.
    In particular, an elastic fastening structure on the membrane can be combined with a rigid fastening structure (in particular latching structure) on the actuating element, which makes it easier to establish and release the form fit. In this way, the membrane with its second fastening structure can be fixed to the first fastening structure of the actuating element with elastic deformation.
    It has been found that a positive connection can provide sufficient holding force to hold the membrane securely in the operating position on the actuating element, while the positive locking simultaneously enables the membrane to be released from the actuating element with little effort when it is to be replaced .
    The membrane should be detachable in one piece from the actuating element so that the change can take place quickly without residues of the old membrane having to be removed from the actuating element.
    For example, one of the fastening structures is designed as a projection and the other fastening structure as a receptacle complementary to the projection.
    The form fit can be improved in that both fastening structures are provided with complementary undercuts which interlock when the membrane is mounted on the actuating element.
    In a preferred variant, the receptacle is formed on the membrane. This can be designed, for example, as a hollow cylinder protruding from the surface of the membrane in the direction of the actuating element.
    Here, for example, an undercut in the form of an annular, circumferentially encircling, radially inwardly directed extension on the hollow cylinder is conceivable. In addition to this, the actuating element can have a projection with an undercut in the form of an annular groove. In this way, the membrane can be "buttoned", i.e. locked, onto the actuating element with a positive fit.
    In particular, the projection can be mushroom-shaped with a circular cross-section.
    The extension can completely fill the annular groove.
    It has been found that the desired pull-off forces in order to separate the membrane from the actuating element can be set, inter alia, by the mass and volume of the membrane material in the extension. The depth and radii of the annular groove also play a role, so that generally the geometry of the annular groove and extension can be adapted by a person skilled in the art in order to determine the forces that are required to loosen and also to connect the membrane.
    In order to facilitate the unbuttoning of the membrane without tools, i.e. only with hand force, with a high holding force, an insertion bevel is formed, for example, at the free end of the receptacle, which facilitates the insertion of the projection by reducing the insertion force at the beginning of the unbuttoning of the membrane .
    Furthermore, the undercut should be defined by a cone emanating from the thickening, a directly adjoining radius at the narrowest point of the undercut in terms of the radius and a directly adjoining counter-cone, which determines the movement of the membrane to the actuating element when plugging and Loosening of the membrane optimized.
    The extension has in particular a thickening provided with a radius, which represents a peripheral edge from which the cone, which forms the annular groove, extends tangentially. The point of the rotationally symmetrical annular groove with the smallest diameter is also provided with a larger radius, which then merges into the mating cone.
    The cone and mating cone can have different cone angles, in particular the angle of the cone is smaller than that of the mating cone, which makes it easier to pull off the membrane.
    The radius in the cross-section thinnest point of the undercut should be larger (preferably by at least a factor of 1.2) than the radius that defines the thickening.
    The ratio of the volume of the undercut to the volume of the thickening at the free end of the projection should, as has been shown in extensive tests, be in the range from 1 to 1.6, in particular 1.2 to 1.4. The stability of the holder, which can be expressed in terms of this ratio, is optimized and non-destructive detachability is nevertheless achieved.
    During normal operation, in which the housing parts are in the operating position and the solenoid valve fulfills its normal function, there is a fixed connection between the membrane and the actuating element. The connection between the fastening structures should be designed so that a force that is necessary to detach the membrane from the actuating element is significantly greater than the forces that occur during normal operation and that act on the connection of the two fastening structures.
    The fastening structures can also be used to press the membrane onto the valve seat, which is why it is advantageous to arrange at least one fastening structure in the region of the valve seat. The second fastening structure on the membrane is preferably even aligned concentrically with the associated valve seat when the valve seat is closed.
    In this case, the first fastening structure on the actuating element can form a rigid contact surface for transmitting force and supporting the membrane on the valve seat. For this purpose, it is advantageous if this contact surface forms approximately the same or a slightly larger surface than the valve seat.
    In a preferred variant, the contact surface is inclined at the maximum pivot angle of the rocker formed by the actuating element, so that a uniform contact pressure acts on the entire surface of the valve seat when the actuating element is in the closed position with respect to this valve seat. This angle can be up to about 4 °, in particular up to about 3 °.
    It would also be conceivable to provide further elements in the area of the fastening structures in order to enlarge the contact surface, for example an additional ring which extends around the projection on the actuating element.
    In order to be able to move the housing easily from the operating position into the service position and back, in one possible embodiment the first and the second housing part are connected to one housing side via a hinge, with the first and / or during the movement into the service position the second housing part can be pivoted about the hinge. In this way, the housing can be easily opened out of the operating position into the service position by pivoting one or both housing parts.
    The hinge can be formed, for example, in such a way that hinge elements are provided on both housing parts, which are connected in particular by an inserted pin which forms a hinge axis, or intermesh in a pivotable manner.
    The membrane is normally arranged in a parting plane between the housing parts when the housing is in the operating position.
    Preferably, a locking mechanism is provided which in particular comprises at least one locking component which interacts with a locking structure on the first and / or on the second housing part, the locking mechanism in a locked position preventing the housing from being movable into the service position, and so on secures the two housing parts to one another in the operating position.
    The locking component can, for example, be a rigid clamp which is designed so that it can be pushed over this parallel to flat side edges of the housing parts lying one above the other in the operating position and thus holds the housing parts together in a form-fitting manner. The side edges form the bolt structures. If the membrane is to be replaced, the locking component is pulled off the housing parts, and these can be moved apart and brought into the service position. Removing and attaching the clip can, if necessary, only be done by hand without tools.
    In another embodiment, the locking mechanism is a clip mechanism. This includes, for example, a pivotable bracket which is fixed to one of the housing parts and which engages the other housing part with a contact surface. The bracket corresponds to the locking component, while the contact surface forms the locking structure. The clamping mechanism can preferably be operated without tools.
    The clip mechanism can be designed in the manner of a known clip lock. In this way, the housing can be easily opened into the service position by hand without tools in order to replace the membrane.
    Such a clamp mechanism can be combined with a hinge on the opposite side of the housing.
    It is also possible to provide a clamp mechanism with two pivotable brackets and to arrange these on opposite narrow sides of the housing. In this case, no hinge is provided.
    The solenoid valve can be designed in particular as a 3/2-way valve or as a 2/2-way valve. In the first case, two valve seats are preferably provided alongside one another along a longitudinal direction of the actuating element, which are assigned to the two arms of the rocker of the actuating element and which are alternately opened and closed when the actuating element is moved by the drive. In this case, the open position and the closed position are each defined separately for the individual valve seats, the closed position of the actuating element for one valve seat always correlating with the open position for the other valve seat.
    In particular, when designed as a 3/2-way valve, two connection sections, each with a first fastening structure on the actuating element, are preferably provided, which cooperate with two second fastening structures on the membrane.
    The actuating element is, inter alia, in this case preferably a rocker, which is connected to the membrane on each of its two arms.
    The maximum possible stroke of the membrane from the valve seat with the valve can be, for example, 0.3 to 2.0 mm, in particular 0.5 to 1.0 mm.
    The above-mentioned object is also achieved with an assembly consisting of a solenoid valve, as described above, and a membrane which can be positively connected to the actuating element. The membrane can be replaced once or several times during the life of the solenoid valve, so that if the membrane is worn, the old membrane can be replaced with a new membrane.
    The invention also relates to a method for replacing a membrane of a solenoid valve, as described above, with the steps:the housing parts are brought from the operating position to the service position,the diaphragm mounted on the actuating element is removed from the actuating element by releasing a form fit between the diaphragm and the actuating element,a membrane to be newly installed is fixed to the actuating element by producing a form fit between the membrane and the actuating element, andthe housing parts are moved back from the service position to the operating position.
    Preferably, no further fastening steps are required, so that the membrane can be exchanged in a simple manner and, in particular, without tools.
    The invention is described in more detail below on the basis of several exemplary embodiments and with reference to the accompanying figures, the features of the embodiments also being interchangeable with one another. In the drawings show:FIG. 1 shows a solenoid valve according to the invention according to a first embodiment in a schematic sectional view in an operating position;FIG. 2 shows the solenoid valve from FIG. 1 in a schematic perspective illustration in a service position;FIG. 3 components of the solenoid valve from FIG. 1 in an exploded view;FIG. 4 shows an enlarged detail from FIG. 1;FIG. 5 shows a schematic perspective illustration of an actuating element of the solenoid valve from FIG. 1;Figures 6 to 8 details of the membrane and the actuating element; andFIGS. 9 to 11 show a solenoid valve according to the invention according to a second embodiment in schematic exploded views and a sectional view.
    The figures show a solenoid valve 10 in the form of a diaphragm valve which is designed as a 3/2-way valve.
    A first embodiment is shown in FIGS. 1 to 5 and a second embodiment is shown in FIGS. 6 to 8.
    A housing 12 of the solenoid valve 10 comprises a first housing part 14 and a second housing part 16, which together can enclose an interior space, a membrane 18 being arranged in a separating plane E (see FIG. 1) between the two housing parts 14, 16.
    The membrane 18 separates a fluid-carrying control space 20 from a drive side on which a drive 22 is provided. The membrane 18 prevents the drive side from coming into contact with the fluid in the control chamber 20.
    The first housing part 14 has several fluid channels 24, in this case three. The two outer fluid channels 24 are here each connected to a valve seat 26 opening into the control chamber 20.
    The membrane 18 also fulfills the function of alternately closing and releasing one of the valve seats 26 in order to convey fluid through the solenoid valve 10. In this case, the middle fluid channel 24 is not assigned to a valve seat and serves as an inlet or outlet for a conveyed fluid.
    FIG. 1 shows the solenoid valve 10 in normal operation, the housing parts 14, 16 being in an operating position in which the two housing parts 14, 16 lie on top of one another in such a way that they enclose the membrane 18 in an interior space. In the operating position, a peripheral edge 28 of the diaphragm 18 is clamped between the housing parts 14, 16. The membrane 18 is not accessible from the outside.
    A movably mounted actuating element 30 is arranged in the second housing part 16 (see also FIG. 3), which is designed here as a rocker with two arms 32 which can be pivoted about an axis 34. In the area of the axis 34, the actuating element 30 is pivotably mounted in the second housing part 16.
    The drive 22 acts on one of the arms 32 (the right one in FIG. 2) via a tappet 36, so that the actuating element 30 can be pivoted between two positions by the drive 22. The membrane 18 is pressed onto one of the valve seats 26, which corresponds to a closed position with respect to this valve seat 26, and is lifted from the other valve seat 26, which corresponds to an open position of this valve seat 26.
    In order to reset the actuating element 30, it is pretensioned by a return spring 38 which acts on the arm 32 of the actuating element 30, on which the plunger 36 of the drive 22 does not act, here the left arm 32.
    The membrane 18 is fixed positively on the actuating element 30.
    For this purpose, two rigid connecting sections 40 are provided on the actuating element 30, each of which ends in a first, rigid fastening structure 42. The connecting sections 40 and the first fastening structures 42 are formed in one piece with the actuating element 30 here.
    The fastening structure 42 is here mushroom-shaped, with a circular cross-section over the entire length.
    On the membrane 18, two second fastening structures 44 are provided, which are complementary in shape to the first fastening structures 42, so that the fastening structures 42, 44 can interlock with one another in a form-fitting manner.
    The second fastening structures 44 protrude here from the surface of the membrane 18 and are molded onto the membrane 18 in this example. Therefore, the second fastening structures 44 are made of the same material as the membrane 18 and are thus elastically deformable.
    In the embodiment shown here, the first fastening structures 42 on the actuating element 30 are designed as projections with rounded, thickened free ends and the second fastening structures 44 on the membrane 18 are designed as hollow cylindrical receptacles.
    The form fit (see FIG. 4) between the first fastening structures 42 and the second fastening structures 44 is improved here by the fact that each of the fastening structures 42, 44 has an undercut 100 (see also FIGS. 7 and 8). In the case of the first fastening structure 42, the undercut 100 is designed as a circumferential annular groove 46 between the free end of the projection and the plate-shaped remainder of the actuating element 30, and in the case of the second fastening structure 44 as a circumferential extension 48. When the diaphragm 18 is mounted on the actuating element 30, the extension 48 engages in the annular groove 46 and thus holds the diaphragm 18 securely and firmly in contact with the actuating element 30 under the forces that occur during normal operation in the operating position when conveying fluid.
    The radial depth of the annular groove 46 should be selected as large as possible, while the radius 49 at the transition from the free end of the projection to the annular groove 46 should be selected as small as possible in order to be able to form an extension 48 with great radial depth and the greatest possible mass . However, the radius 49, in particular, should always be selected to be so large that the membrane 18 remains possible to detach.
    The undercut 100 of the projection (see FIG. 7) has a volume V1 which, in relation to the volume V2 of the radially projecting free end of the projection, measured from the narrowest point (see radius r) of the undercut 100, is in the range from 1 to 1.4. In order to determine the volume V2, a fictitious cylinder with radius r is used, which conceptually separates the downwardly and radially outwardly protruding thickening 102 of the projection. The volume V1 results as the volume of the undercut 100 compared to a fictitious cylinder with radius R, that is to say the radius at the thickest point of the protruding material 102 at the free end of the projection. This feature is expressly not limited to the variant shown with the angles specified above, but applies quite generally to all possible variants of the present invention.
    The radii r 'and R' of the receptacle (see FIG. 8) are minimally smaller than the assigned radii r and R, respectively, in order to achieve a slight interference fit.
    An angle β between the transition of the annular groove 46 into the free end (thickening) and a central axis of the projection is therefore always significantly smaller than 90 °, in particular smaller than 60 ° (see also FIGS. 7 and 8). This angle forms a cone which is tangentially connected to the radius 49.
    In the example shown in Figures 6 to 8, the edge of the receptacle has an insertion bevel 51, which facilitates the insertion of the rounded or beveled free end of the projection into the receptacle, since the open end of the receptacle can widen slightly and so the required insertion force reduced.
    An angle γ which the lead-in slope 51 forms with the longitudinal axis of the receptacle is, for example, about 60 ° to 70 °, and is usually greater than the angle β. This angle forms a counter-cone which tangentially adjoins the radius in the annular groove 26.
    The outer contour of the first fastening structure 42 and the inner contour of the second fastening structure 44 are essentially identical here, so that the membrane 18 in the receptacle rests completely on the projection when the membrane 18 is mounted (see e.g. FIG. 4). For this purpose, in the example of FIGS.
    The two connecting sections 40 with the first fastening structures 42 are each assigned to one of the valve seats 26 and are accordingly arranged in the area of the two valve seats 26.
    A flat underside of the first fastening structures 42 in each case forms a contact surface 50 on which the membrane 18 rests and which supports the membrane 18 when it rests on the valve seat 26.
    This contact surface 50 is selected here to be slightly larger than the surface of the valve seat 26, so that the membrane 18 is supported by the first fastening structure 42 over the entire surface of the valve seat 26.
    As FIG. 4 shows, the two contact surfaces 50 are inclined at opposite angles α when the actuating element 30 is in an unloaded, symmetrical position. This angle α corresponds to a maximum pivot angle of the actuating element 30 between the open position and the closed position of the respective valve seat 26, so that the contact surface 50 rests flat on the respective valve seat 26 in the closed position and the entire area of the valve seat 26 is evenly loaded.
    The second fastening structures 44 on the membrane 18 are accordingly designed in such a way that there is play-free contact with the contact surfaces 50.
    On the side of the connecting sections 40, free spaces 51 are provided in the second housing part 16, which give the membrane 18 a predetermined range of movement (see FIG. 4).
    The membrane 18 is designed to be replaced as a wear part.
    According to the first embodiment, the two housing parts 14, 16 are connected to one another via a hinge 52 on an edge, here a narrow side. This can be seen in Figures 1 and 2, for example.
    For this purpose, hinge elements are formed on both of the housing parts 14, 16, through which a hinge pin is pushed, which connects the housing parts 14, 16 to one another. The housing 12 can be opened on the hinge 52 into the service position shown in FIG. 2, in which the interior space between the two housing parts 14, 16 and thus also the membrane 18 is accessible.
    If the membrane 18 is to be exchanged, then when the housing 12 is in the service position according to FIG. 2, it is removed from the first fastening structures 42 of the actuating element 30 without being destroyed. A new membrane 18 is then assembled by pulling, so to speak, unbuttoning its second fastening structures 44 over the first fastening structures 42 of the actuating element 30. In the process, the second fastening structures 44 are elastically deformed, and the undercuts interlock so that the annular extensions 48 come to lie in the annular grooves 46.
    When the form fit of the diaphragm 18 with the actuating element 30 is established, the housing parts 14, 16 are folded back into the operating position on top of one another, the peripheral edge 28 of the diaphragm 18 being clamped between the two housing parts 14, 16.
    Both the movement of the housing parts 14, 16 between the operating position and the service position and the replacement of the membrane 18 can, if necessary, take place without tools.
    Unintentional opening of the housing 12 is prevented by a locking mechanism 53. This comprises a locking component 54 (see also FIG. 3) which fixes the two housing parts 14, 16 to one another in the operating position.
    In this example, the locking component 54 is formed by a type of clamp which is pushed in a longitudinal direction L of the housing 12 and the actuating element 30 onto flat side edges of the housing parts 14, 16, which form locking structures 56. In this way, the housing parts 14, 16 are held in a locked position of the locking member 54 in the operative position and are prevented from moving away from one another. If the housing 12 is to be brought into the service position, the locking component 54 is first pulled off along the longitudinal direction L before the housing parts 14, 16 are folded apart.
    FIGS. 9 to 11 show a second embodiment of a solenoid valve 10. The essential difference to the first embodiment lies in the type of locking mechanism 53.
    In this example, the locking mechanism 53 comprises a clamp mechanism 58 which is provided on a narrow side of the housing 12. The clip mechanism 58 is designed in the manner of a known clip lock and has a pivotable clip 60 which, with a contact surface 62 at its free end, can engage in a recess 64 shaped as an undercut. The bracket 60 thus corresponds to the locking component 54 and the contact surface 62 corresponds to the locking structure 56.
    The bracket 60 is arranged here on the second housing part 16, while the recess 64 is formed on the first housing part 14.
    The locking and unlocking of the locking mechanism 53 in the form of the clamp mechanism 58 is here tool-free, that is, only possible with manual force.
    On the narrow side of the housing 12 opposite the clamp mechanism 58, a hinge 52 is provided about which the housing parts 14, 16 can be pivoted when the bracket 60 is released. If, on the other hand, the clamp mechanism 58 is locked and the bracket 60 is in engagement with the recess 64, the housing parts 14, 16 cannot be moved relative to one another.
    In this example, the hinge 52 is formed by a hook-shaped strip 66 on the second housing part 16 and a projection 68 on the first housing part 14, which engages in the recess 70 formed by the strip 66.
    Of course, the bracket 60 and / or the strip 66 could also be provided on the first housing part 14.
    In the variant shown in FIG. 6, a clip mechanism 58 is provided on each of the two narrow sides of the housing 12. Both brackets 60 must be opened for unlocking and accordingly closed again for locking. A hinge is not provided in this version.
    The form-fitting connection between the membrane 18 and the actuating element 30 allows the membrane 18 to be exchanged by opening the housing 12 and thus the solenoid valve 10 to continue to be used.
    权利要求:
    Claims (17)
    [1]
    1. Solenoid valve with a housing (12) comprising a first and a second housing part (14, 16), a flexible membrane (18) being arranged between the first and the second housing part (14, 16), wherein the first housing part (14 ) at least one fluid channel (24) is formed with a valve seat (26), which can be closed by the membrane (18), and a movably mounted actuating element (30) is received in the second housing part (16), which is accommodated with the membrane (18) is connected and which in an operating position of the first and the second housing part (16) releases the membrane (18) from the valve seat (26) when moving into an open position and releases the membrane (18) from the valve seat (26) when moving into a closed position ) presses, wherein the housing (12) is designed so that the first and the second housing part (14, 16) can assume a service position in which the first and the second housing part (14, 16) are apart and in which the Membrane (18) accessible Lich and wherein the membrane (18) is non-destructively detachable connected to the actuating element (30) and the membrane (18) and the actuating element (30) are designed so that the membrane (18) can be removed from the actuating element (30) in the service position and can be connected to it.
    [2]
    2. Solenoid valve according to claim 1, characterized in that it is designed for a tool-free replacement of the membrane (18).
    [3]
    3. Solenoid valve according to one of the preceding claims, characterized in that at least one connecting section (40) is provided on the actuating element (30) which has a first fastening structure (42) which is connected to a complementary second fastening structure (44) on the membrane (18 ) is positively connectable.
    [4]
    4. Solenoid valve according to claim 3, characterized in that one of the fastening structures (42, 44) is designed as a projection and the other fastening structure (44, 42) is designed as a receptacle complementary to the projection.
    [5]
    5. Solenoid valve according to claim 4, characterized in that both fastening structures (42, 44) are provided with complementary undercuts which interlock when the membrane (18) is mounted on the actuating element (30).
    [6]
    6. Solenoid valve according to claim 5, characterized in that the undercut of the projection has a volume (V1) that is in relation to the volume (V2) of the radially projecting, a thickening-forming free end of the projection measured from the narrowest point of the undercut in the area from 1 to 1.6.
    [7]
    7. Solenoid valve according to one of claims 3 to 6, characterized in that an insertion bevel (51) for the first fastening structure (42) is formed on the membrane (18) on the second fastening structure (44).
    [8]
    8. Solenoid valve according to one of claims 3 to 7, characterized in that at least one fastening structure (42, 44) is arranged in the region of the valve seat (26) and is preferably aligned concentrically to this when the valve seat (26) is closed.
    [9]
    9. Solenoid valve according to one of the preceding claims, characterized in that the membrane (18) is connected directly to the actuating element (30) via a latching connection.
    [10]
    10. Solenoid valve according to one of the preceding claims, characterized in that a locking mechanism (53) is provided which in particular comprises at least one locking component (54) which is connected to a locking structure (56) on the first and / or on the second housing part (14, 16 ) cooperates, the locking mechanism (53) in a locked position preventing the housing (12) from being movable into the service position.
    [11]
    11. Solenoid valve according to claim 10, characterized in that the locking mechanism (53) is a clamp mechanism (58) which in particular comprises a pivotable bracket (60).
    [12]
    12. Solenoid valve according to one of the preceding claims, characterized in that the actuating element (30) is designed as a rocker with two arms (32).
    [13]
    13. Solenoid valve according to claim 12, characterized in that two adjacent valve seats (26) are provided along a longitudinal direction (L) of the actuating element (30).
    [14]
    14. Solenoid valve according to claim 13, characterized in that the rocker is connected to its two arms (32) in each case with the membrane (18).
    [15]
    15. An assembly comprising a solenoid valve according to one of the preceding claims and a membrane (18) which can be positively connected to the actuating element (30).
    [16]
    16. A method for replacing a membrane (18) of a solenoid valve (10) according to one of the preceding claims, comprising the steps:- the housing parts (14, 16) are brought from the operating position to the service position,- The membrane (18) mounted on the actuating element (30) is removed from the actuating element (30) by releasing a form fit between the diaphragm (18) and the actuating element (30),- A membrane (18) to be newly installed is fixed on the actuating element (30) by producing a positive fit between the membrane (18) and the actuating element (30), and- The housing parts (14, 16) are moved back from the service position into the operating position.
    [17]
    17. The method according to claim 16, characterized in that the housing parts (14, 16) are detached from one another without tools and brought into the service position.
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    同族专利:
    公开号 | 公开日
    US20210283731A1|2021-09-16|
    DE102020107055A1|2021-09-16|
    CN113389915A|2021-09-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE202009016447U1|2009-12-03|2010-03-11|Bürkert Werke GmbH|Fluidic control|
    DE102012007766A1|2012-04-20|2013-10-24|Bürkert Werke GmbH|Process and manufacture of valves, valves and valve series|
    DE102014114212A1|2014-09-30|2016-03-31|Bürkert Werke GmbH|diaphragm valve|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102020107055.1A|DE102020107055A1|2020-03-13|2020-03-13|Solenoid valve assembly, and method of replacing a diaphragm|
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