Valve for flowable medium

Abstract

The present invention relates to a valve for a flowable medium, particularly for a liquid adhesive or glue, comprising a valve body (21) and an elongated closing mechanism (25) disposed in the valve body (21) and axially movable in a medium passage (20) of the valve by a controllable actuator. In the closed position, the closing mechanism abuts against a valve seat (22) and simultaneously closes a discharge port (23) connected to the medium passage (20). In the open position, the closing mechanism lifts off the valve seat (22) and releases the discharge port. The closing mechanism is connected to a sealing element for sealing the medium passage, i.e., to a portion of an elongated corrugated bellows (39), which is particularly hollow and preferably made of metal, and moves together with the closing mechanism (25) in axial movement. Another portion of the corrugated bellows (39) is fixedly mounted in the valve. The present invention is characterized in that the axial relative position between the bellows (39) and the valve seat (21) is matched to the deviation (manufacturing tolerance) between the actual length dimension and the nominal length dimension of the bellows (39) used due to manufacturing conditions, such that the deviation is fully or partially compensated.

Description

Technical Field

[0001] The present invention relates to a valve for a flowable medium, particularly for a liquid adhesive or glue, comprising a valve body and an elongated closing mechanism disposed in the valve body, which is axially movable in the medium passage of the valve by a controllable actuator. In a closed position, the closing mechanism abuts against a valve seat and simultaneously closes a discharge port connected to the medium passage. In an open position, the closing mechanism lifts off the valve seat and releases the discharge port.

[0002] Here, the valve may also be additionally connected to a sealing element for sealing the medium passage, namely, to an elongated corrugated bladder, which is particularly hollow (preferably made of metal), that moves together with the closure mechanism as it moves axially. Background Technology

[0003] Such valves are known. The closing mechanism undergoes numerous opening and closing movements (up to hundreds of millions of times) during its service life. If a bellows-shaped pleated valve, typically made of metal, is used as the sealing element, it is usually connected to the closing mechanism at one end and fixedly mounted in the valve at the other end. The bellows-shaped pleated valve moves accordingly during the axial movement of the closing mechanism, i.e., it expands and contracts alternately at a high frequency, which negatively impacts the maximum service life of such a bellows-shaped pleated valve. Summary of the Invention

[0004] The purpose of this invention is to improve the type of valve described at the beginning.

[0005] This objective is achieved by the valve according to the invention.

[0006] A valve for a flowable medium according to the invention includes a valve body and an elongated closing mechanism disposed in the valve body, axially movable in the medium passage of the valve by a controllable actuator. In a closed position, the closing mechanism abuts against a valve seat and simultaneously closes a discharge port connected to the medium passage. In an open position, the closing mechanism lifts off the valve seat and releases the discharge port. The closing mechanism is connected to a sealing element for sealing the medium passage, i.e., to a portion of a hollow, elongated bellows that moves with the closing mechanism during axial movement. Another portion of the bellows is fixedly mounted in the valve. The axial relative position between the bellows and the valve seat is matched to a deviation caused by manufacturing conditions between the actual length and the rated length of the bellows used, such that the deviation is fully or partially compensated. To compensate for the deviation between the actual length and the rated length of the bellows, the valve has a compensation mechanism whose thickness affects the axial relative position between the bellows and the valve seat.

[0007] In cases where bellows pleats are used as sealing elements, the valve should be improved in such a way that the service life of the bellows pleats used is optimized.

[0008] Accordingly, the valve of the present invention is characterized in that: the axial relative position between the bellows and the valve seat is matched to the deviation (manufacturing tolerance) between the actual length dimension and the rated length dimension of the bellows used due to manufacturing conditions, or in other words, the axial relative position between the bellows and the valve seat is adjusted to address the deviation, so that the deviation is fully or partially compensated.

[0009] As is known from the present invention, length tolerances (manufacturing tolerances) in the bellows during its manufacturing process result in high, unintended forces being introduced into the valve, or particularly into the bellows, during operation of prior art valves. This is because, during valve manufacturing, the bellows are unintentionally inserted into the corresponding mounting space in the valve under prestress (either compressed or elongated) that negatively impacts their service life due to tolerances. Due to the high elastic constant of the bellows, unintentional, tolerance-induced deviations in the corresponding spring bellows then lead to the introduction of relatively high, unintended forces.

[0010] According to the present invention, the adjustment of the axial relative position between the bellows and the valve seat compensates for this unintended deviation, thereby eliminating unintended force introduction or resulting in only a much smaller force introduction that does not negatively affect the service life of the corresponding bellows. In other words, during valve manufacturing, the position of the bellows and / or the valve seat in the valve body (which is structurally determined first based on the rated length dimension of the bellows) matches the actual length of the bellows used.

[0011] Such matching / adjustment has multiple possibilities. Thus, in a preferred first embodiment of the invention, to compensate for the deviation between the actual length dimension and the rated length dimension of the bellows, a compensation mechanism that affects the axial relative position between the bellows and the valve seat can be used. Here, the compensation mechanism can preferably be an annular spacer.

[0012] For example, there is a spacer arranged in a valve housing, fluid-tightly connected to or fastened to the bellows, for receiving the bellows, between a (fixed) support surface of the valve housing or one of the valve housings, particularly circumferentially arranged in a plane transverse to the axial direction, the receiving portion being supported on or mounted on the support surface.

[0013] As an alternative, the position of the valve seat in the housing can also be changed by a spacer, for example, arranged between a support surface for the valve seat disposed in the valve housing and a support surface of the valve housing, or one of the valve housings, particularly circumferential, preferably arranged in a plane transverse to the axial direction, on which the valve seat is supported or mounted.

[0014] Furthermore, it can be specified that the matching positioning of the corrugated pleats and the corrugated pleat receiving part through a fluid-tight connection, or the matching positioning of the corrugated pleats fixed on the corrugated pleat receiving part, can fully or partially compensate for the deviation between the actual length dimension and the rated length dimension of the corrugated pleats. For example, by changing the positioning of the welding points or welding lines that fasten the corrugated pleats to the corrugated pleat receiving part.

[0015] Here, the thickness of the corresponding spacer can be selected such that the deviation between the nominal length dimension and the actual length dimension of the corrugated pleat is just compensated, that is, equal to this deviation, for example.

[0016] Regarding the corrugated pleats, they can be arranged coaxially with, in particular, rod-shaped sections of the closure mechanism within the medium channel, or extend within the medium channel.

[0017] The aforementioned portion of the closure mechanism can preferably be arranged inside the pleats of the corrugated pleat.

[0018] In a further embodiment of the invention, the medium passage in the valve may be defined at an end remote from the valve seat by a wall extending transversely to the axial direction, in which a through-hole is formed, along which the sealing mechanism extends from the medium passage. To seal the area between the sealing mechanism and the wall surrounding the through-hole, a bellows may surround one or more of the sealing mechanism, particularly a rod-shaped segment, arranged in the medium passage and extending at least into the through-hole. The fixedly mounted segment of the bellows, i.e., the first end member of the bellows, particularly a hollow cylindrical shape, is fluid-tightly connected, particularly welded, to the wall's, particularly surrounding, connection surface to the through-hole. Furthermore, the segment of the bellows connected to the sealing mechanism, i.e., the second end member of the bellows, particularly a hollow cylindrical shape, is fluid-tightly connected, particularly welded, to the segment of the sealing mechanism.

[0019] Regarding the connecting surface surrounding the wall, the first end piece of the corrugated pleated bladder is fluid-tightly connected to this connecting surface, thus allowing it to surround the through-hole (radially). Specifically, it can extend coaxially with the first end piece.

[0020] Preferably, the second end member of the corrugated pleated bladder can abut against the outside of the connecting surface surrounding the particularly rod-shaped section of the closure mechanism and be fluid-tightly connected to, particularly welded to, the connecting surface.

[0021] The fluid-tight connection between the first end member of the corrugated plenum and the wall and / or the connection between the second end member of the corrugated plenum and a portion of the closure mechanism, particularly the connection with the surface of that portion, can preferably be constructed as a laser-welded connection.

[0022] The wall, in particular, extending transversely to the axial direction, can be the wall of the corrugated pleated fossa receiving portion.

[0023] The through-hole may extend coaxially with a particularly rod-shaped section of the closure mechanism, which is guided through the through-hole.

[0024] In another embodiment of the invention, the bellows-shaped receiving portion may be integrally connected to the valve housing. Alternatively, the bellows-shaped receiving portion may also be a separate component disposed within the valve housing.

[0025] Preferably, the bellows bladder, in the closed position of the valve, is supported in the medium passage under a anticipated or desired prestress, particularly elongated or compressed relative to a stress-free state. Here, this prestress is preferably chosen to be much smaller (at least 90% smaller) than the prestress resulting from the unintended, uncompensated deviation between the actual length and the rated length of the bellows bladder as outlined above in the prior art. The force introduced into the valve or bellows bladder due to this anticipated prestress is also correspondingly very small, and the resulting reduction in service life is negligible.

[0026] Advantageously, the valve's closing force mechanism, particularly the spring, applies a closing force toward the valve seat to the closing mechanism in the valve's closed position. However, the bellows in this context, in the valve's closed position, applies a smaller (additional) opening force relative to the closing force, particularly generated by the aforementioned desired prestress, to the closing mechanism in order to assist the subsequent opening movement caused by the opening force of the opening force mechanism, particularly the controllable actuator, in order to react with the closing force.

[0027] Alternatively, it can be specified that the valve's opening force mechanism, particularly the controllable actuator, applies an opening force to the closing mechanism in the valve's open position, particularly in the opposite direction to the closing force of one or the closing force mechanism, and that the bellows applies an (additional) closing force to assist the subsequent closing movement of the closing mechanism caused by the valve's closing force mechanism, which reacts against the opening force, particularly generated by the aforementioned anticipated prestress, and is less than the opening force.

[0028] Additionally, it can be specified that the valve parameters, particularly the parameters of the closing mechanism, medium passage, valve seat, and / or bellows (including the corresponding installation position and dimensions), can be selected such that, in the open position corresponding to half the stroke length of the closing mechanism, a stress-free state occurs in the bellows that moves together with the closing mechanism.

[0029] Regarding the walls of the corrugated pleated sac, the walls can be constructed as multi-layered, particularly two-layered.

[0030] According to another embodiment of the invention, the controllable actuator (the closing mechanism can move axially using the controllable actuator) may include an electromagnet with a coil, the closing mechanism or an armature connected to the closing mechanism constituting the core or armature of the electromagnet, wherein the closing mechanism extends in the valve housing from the end of the closing mechanism that abuts against the valve seat in the closed position through the medium passage and through the space surrounded by the coil to the region on the other side of the coil.

[0031] The closure mechanism can be radially guided on at least two guide devices, namely, on the one hand, on a first guide device arranged adjacent to the valve seat in the medium channel, and on the other hand, on a second guide device arranged in the area on the other side of the coil.

[0032] Here, the first and / or second guiding device may be or have a guide member having a preferably disc-shaped guide member section extending transversely to the axial direction, in which there is an (axial) guide member through hole through which the closing mechanism extends.

[0033] In addition, the guide section of the guide member of the first guide device, which extends laterally to the axial direction, may have one or more additional (axial) through holes through which the medium in the medium channel can flow toward the valve seat.

[0034] The independent features of the valve involve the support or guidance of the closing mechanism in the valve, which is achieved in particular by a second guiding device. These independent features can also be advantageously used independently of the above embodiments, especially independent of the use of bellows, but of course they can also be combined with one or more of the above embodiments or features.

[0035] Additionally, the valve of the present invention is characterized in that: the closing mechanism has an end that seals against the valve seat in the closed position, the closing mechanism extending through the medium passage from this end, and the closing mechanism has (another) end arranged on the other side of the medium passage, the closing mechanism being radially supported in the region of this end by a cap-shaped guide that is non-rotatably connected to this end, the guide being arranged in a stationary sliding bearing sleeve of the valve and being axially movable in the sliding bearing sleeve while sliding against it.

[0036] Here, the guide member that is not rotatably connected to the closing mechanism may also be the guide member of the second guide device described above.

[0037] According to the present invention, the above-described support method of the closing mechanism can enable the valve to have a particularly long service life or to perform a particularly large number of closing mechanism strokes until significant wear occurs.

[0038] According to a further embodiment of this concept, the guide member, which is non-rotatably connected to the closing mechanism, can be non-rotatably supported on or arranged on the armature member while abutting against it.

[0039] The guide element is preferably made of high-grade alloy steel, particularly high-grade alloy steel 1.4112 or high-grade alloy steel with similar properties.

[0040] The stationary sliding bearing sleeve may also be made entirely or partially of a copper alloy containing or not containing aluminum, such as aluminum bronze, or entirely or partially of steel or high-grade alloy steel.

[0041] Alternatively, the stationary sliding bearing sleeve may have a backing or backing layer made of steel or high-grade alloy steel and an anti-wear layer made of polymer. Attached Figure Description

[0042] Further features of the invention will be apparent from the following description of preferred embodiments and from the accompanying drawings. The drawings show:

[0043] Figure 1 It is a perspective view of a valve system having a plurality of valves of the present invention arranged on the distributor body of the valve system;

[0044] Figure 2 It is the valve system along Figure 1 The section along section line II-II;

[0045] Figure 3 It is a cross-section of a single valve in a valve system;

[0046] Figure 4 It is the valve along Figure 3 The section along section line IV-IV;

[0047] Figure 5 yes Figure 3 An enlarged view of a partial diagram, showing a spacer with a first thickness;

[0048] Figure 6 yes Figure 5 A partial view showing a spacer with a second thickness;

[0049] Figure 7 It is similar to an alternative implementation of a single valve. Figure 3 The cross-section. Detailed Implementation

[0050] In the current embodiment, the valve 10 of the present invention is shown as part of the valve system 11. However, this is not mandatory. The present invention also includes single valves.

[0051] Currently, the invention relates to a valve system 11 that allows a liquid medium, such as an adhesive (hot melt adhesive or cold adhesive), to be applied to a substrate, for example, to a cut piece for a cigarette box or similar material. However, such a valve system 11 can also be used on other substrates.

[0052] In a known manner, a plurality of individual valves 10 are arranged on the valve system 11, in the present case five valves 10. More precisely, each valve 10 is fastened to a common distributor body 12 of the valve system 10, to which liquid medium is supplied from a medium source (not shown) via a delivery conduit 13.

[0053] Here, a delivery pipe 13 (e.g., a hose) leads into a medium inlet 14 of the distributor body 12, which is connected to a medium channel 15 arranged in the distributor body 12 for fluid delivery. Each valve 10 is connected to the medium channel, thereby leading the liquid medium to these valves via the medium channel 15.

[0054] Each valve 10 in the present case has a nozzle 16 arranged on the distributor body 12, particularly on the lower side of the distributor body, and through the nozzle, i.e. through the nozzle outlet 17, discharges the liquid medium onto the substrate.

[0055] Here, the outlet 17 of the nozzle 16 is located at the end of the nozzle channel 18, which is connected upstream to a medium channel 19 in the distributor body 12, through which liquid medium is drawn in portions from a medium channel 20 located in the housing 21 of the valve 10.

[0056] The liquid medium is introduced from the medium passage 15 located upstream of the distributor body 12 via the inlet 36 in the medium passage 20 to the medium passage 20 of the valve 10.

[0057] In order to dispense liquid medium from the medium passage 20 of valve 10 into the medium passage 19 of the distributor body, valve 10 has an axially reciprocating, elongated closing mechanism 25 that moves within the medium passage 20. This closing mechanism, in the closed position, closes a discharge port 23 connected to the medium passage 20 of valve 10 (see [link to product description]). Figures 3 to 6 And release the outlet in the open position (not shown).

[0058] The outlet 23 is part of the valve seat 22 of the valve 10, which has, in the present case in particular, an annular abutment or sealing surface for forming the closure 24 at the first end of the closing mechanism 25.

[0059] In the closed position of the closing mechanism 25, the first end or the closing element 24 is sealed against the valve seat 22 or its abutment surface.

[0060] In the open position of the closing mechanism 21, this end or closure 24 is lifted off the valve seat 22, in the current case, lifted downwards, and at the same time, the outlet 23 is released.

[0061] The closing mechanism 25 extends from its end formed by the closure member 24 through the medium passage 20 and through an internal space 27 surrounded by a coil 28 of an electromagnet 26 in the housing 21 of the valve 10, all the way to the area on the other side of the coil 28.

[0062] The closing mechanism 25 is radially supported in the housing 21 by a first guide device 29 arranged adjacent to the valve seat 22 in the medium channel 20 and a second guide device 30 arranged on the other side of the coil 28, so that the closing mechanism (only) can perform axial reciprocating motion.

[0063] Here, the first guide device 29 has a guide member 29a extending transversely to the axial direction along the medium channel 20, the guide member having a guide member section 29b arranged in a plane transversely to the axial direction, in which there is a central (axially extending) guide member through hole 29c, through which the closing mechanism 25 extends.

[0064] The guide section 29b also has an additional (edge-side) through hole 29d through which the medium can flow along the guide section 29b or the guide 29a.

[0065] The second guide device 30 is similar to the first guide device and has a guide member 30a that extends laterally to the axial direction, currently configured as a guide sleeve, currently in the shape of a cap. The guide member has a guide member section 30b arranged in a plane laterally to the axial direction, in which there is a central (axially extending) guide member through hole 30c, through which the closing mechanism 25 extends.

[0066] The closing force on the sealing mechanism 25 is applied by a pressure spring 32 arranged on the other side of the medium channel 20. The pressure spring is supported on the support surface 34 of the housing 21 on one hand and pressed on a disc-shaped section 35 of the sealing mechanism 25 on the other hand.

[0067] The opening force is generated by the electromagnet 26, whose core or armature forms an armature 33, a metal component, which is non-rotatably connected to the closing mechanism 25. Specifically, the closing mechanism 25 is guided through a central hole in the armature 33 and (see above) through a guide hole 30c in a cap-shaped guide 30a. The cap-shaped guide 30a abuts against and is supported on the armature 33, and is secured there by a nut 51, which is screwed onto a threaded section 48 at the end of the closing mechanism 25.

[0068] Furthermore, the second guide device 30 has a hollow cylindrical recess 49 within the housing 21, and a hollow cylindrical wall 49a formed by the housing 21 of the valve 10, which surrounds the guide member 30a, particularly the cylindrical guide member surface 30d, at a small distance. During the axial reciprocating motion of the closing mechanism 25 facilitated by the electromagnet 26, the guide member 30a and the closing mechanism 25, which is therefore non-rotatably connected to the guide member, are then guided radially through or along the hollow cylindrical wall 49.

[0069] The medium channel 20 is defined at its end opposite to the valve seat 22 by a wall 37 extending in a plane transverse to the axial direction. The closure mechanism 25 is led out from the medium channel 29 through a through hole 38 in the wall 37.

[0070] To seal the area between the closure mechanism 25 and the wall 37 surrounding the closure mechanism 25, a corrugated metal pleated 39 is provided.

[0071] For this purpose, the corrugated pleated 39 is fluid-tightly connected to the wall 37 surrounding the through-hole 38, i.e., currently (laser-welded) together. Here, the wall 37 is part of the corrugated pleated receiving portion 43 arranged in the housing 21 for the corrugated pleated 39.

[0072] Specifically, the first segment of the corrugated pleated 39 (i.e., the first end piece 40 in the shape of a hollow cylinder) is connected on its outer surface to a corresponding circumferential (axial) connecting surface 41, which radially surrounds the through hole 38 and extends coaxially with the end piece 40.

[0073] The corrugated pleated 39 is fluid-tightly connected to the corrugated pleated 39 on the other hand. Specifically, the second section of the corrugated pleated 39 (i.e., the hollow cylindrical second end piece 42) is connected to, and in particular, welded (laser-welded) to, a particularly circumferential outer surface of the closure mechanism 25. The corrugated pleated 39 moves accordingly with the closure mechanism 25 during each opening and closing movement.

[0074] As in Figures 3 to 6 As shown in the diagram, here, the corrugated pleat 39 covers or surrounds the particularly rod-shaped section of the closure mechanism 25, which extends in the medium channel 20 all the way into the through hole 38, or the closure mechanism 25 / the section of the closure mechanism is arranged within the corrugated pleat 29.

[0075] As mentioned at the beginning, it is now particularly important that the length tolerance of the (axial) length dimension of the bellows 39 caused by manufacturing conditions may result in high, unintended forces that reduce the valve's service life being introduced into the bellows 39 during valve 10 operation. These forces, in the illustrated installation state, cause the bellows 39 to be pre-tightened to an unintended degree.

[0076] To prevent this from happening, the deviation should be fully or partially compensated.

[0077] For this purpose, a compensation mechanism 44 is provided that affects the axial relative position between the bellows 39 and the valve seat 22.

[0078] In the current situation, the compensation mechanism is a spacer 45, which is currently configured as annular or as a spacer gasket.

[0079] As in Figure 5 and 6 As shown, the corresponding spacer 45 is arranged on a particularly circumferential (arranged in a plane transverse to the axial direction) abutment or support surface 46 of the housing 21 - the corrugated folding vent 43 (currently axially) is supported on this support surface - between the corrugated folding vent 43, currently a support surface 47 of the corrugated folding vent 43 opposite the support surface 46 of the housing 21.

[0080] Therefore, the axial position of the corrugated pleated 39 is affected accordingly. Figure 5 In position / 6, the thickness of the spacer 45 is increased compared to the standard position without such a spacer 45, or in other words, the relative positions between the bellows 39 (on one hand) and the valve seat 21 (on the other hand) are altered, i.e., the distance between them is increased. The corresponding spacer 45 compensates for the corresponding deviation between the actual length and the nominal length of the bellows 39 shown in the figures, caused by manufacturing conditions.

[0081] As can be seen, Figure 6 The spacer in the middle is 45 times Figure 5 The spacer 45 is thicker, or rather, its axial dimension is chosen to be larger, because it is... Figure 5 Compared to the corrugated pleated pouch 39 used in the past, Figure 6 The actual length of the corrugated pleated 39 used deviates from a corresponding nominal length by a greater margin.

[0082] However, it can be further specified that the components are matched or coordinated in such a way that the bellows 39 is installed in the valve under a pre-stress that is expected (much smaller than the unexpected pre-stress mentioned above), such that the bellows 39, in the closed position shown in the closing mechanism 25, applies an opening force to the closing mechanism 25 in the opposite direction to the closing force of the pressure spring 32 to assist the subsequent opening movement caused by the electromagnet 26, and such that the bellows 39, in the open position of the closing mechanism 25, applies a closing force to the closing mechanism 25 in the opposite direction to the opening force of the electromagnet 26 to assist the subsequent closing movement caused by the pressure spring 32 when the opening force of the electromagnet 26 disappears.

[0083] exist Figure 7 It is shown in particular Figures 3 to 6 This is an alternative to the single valve 10 shown. The same components are labeled as... Figures 3 to 6 The same reference numerals are used in the accompanying drawings.

[0084] As can be seen, Figure 7 The single valve 10 differs only in the area of ​​the second guide device 30 of the closing mechanism 25. This second guide device 30 additionally has a stationary, currently hollow cylindrical sliding bearing sleeve 50, which is supported in a hollow cylindrical recess 49. During the axial reciprocating motion of the closing mechanism 25, the guide 30a is located within the sliding bearing sleeve, sliding against it (if necessary, with the use of suitable lubricant or lubricant).

[0085] It has been proven that using such a sliding bearing sleeve 50 can give the valve 10 a particularly long service life, or enable the closing mechanism 25 to perform a particularly large number of axial reciprocating movements until significant wear occurs.

[0086] The guide element 30a is preferably made of high-grade alloy steel, particularly high-grade alloy steel 1.4112 or high-grade alloy steel with similar properties.

[0087] The stationary sliding bearing sleeve 50 may be made entirely or partially of an aluminum-containing or aluminum-free copper alloy, such as aluminum bronze, or entirely or partially of steel or high-grade alloy steel.

[0088] Alternatively, the stationary sliding bearing sleeve 50 may have an (outer) back layer or backing layer made of steel or high-grade alloy steel, and an anti-wear layer made of polymer (on the inner side facing the guide 30a). Here, it is also possible to have an additional coating, such as a bronze layer (depending on the situation, made of powder metallurgy bronze), between the backing layer and the polymer coating.

[0089] Finally, Figure 7 Also visible is a removable cover 52, through which the recess 49 and the components arranged in the recess can be accessed.

[0090] List of reference numerals

[0091] 10 Valves

[0092] 11 Valve System

[0093] 12 Distributor Body

[0094] 13. Delivery pipes to the main body of the distributor

[0095] 14. Media inlet of the distributor body

[0096] 15. Media channel of the distributor body

[0097] 16 nozzles

[0098] 17. Nozzle outlet

[0099] 18 Nozzle channels

[0100] 19. Media channels of the distributor body

[0101] 20. Medium passage of valve

[0102] 21. Shell

[0103] 22 Valve seat

[0104] 23 Valve seat discharge port

[0105] 24. Enclosure

[0106] 25. Closed structure

[0107] 26 Electromagnet

[0108] 27. Internal space of the coil

[0109] 28 coils

[0110] 29 First guiding device

[0111] 29a Guide component

[0112] 29b Guide section

[0113] 29c Guide hole

[0114] 29d Through-hole for media

[0115] 30 Second guide device

[0116] 30a Guide Component

[0117] 30b Guide section

[0118] 30c guide through hole

[0119] 30d cylindrical guide surface

[0120] 32 Compression Spring

[0121] 33 Metal components

[0122] 34 Support surface

[0123] 35 Disc-shaped section

[0124] 36. Inlet to the medium channel

[0125] 37. Wall of the corrugated pleated receiving section

[0126] 38 through holes

[0127] 39. Rippled Folded Pouch

[0128] 40. First end piece of the corrugated pleated bladder

[0129] 41 Axial connection surface of through hole

[0130] 42. Second end piece of the corrugated pleated bladder

[0131] 43 Corrugated pleated receiving section

[0132] 44 Compensation agencies

[0133] 45 spacers

[0134] 46. ​​Support surface of the shell

[0135] 47. Support surface of the corrugated pleated receiving section

[0136] 48 threaded section

[0137] 49. The concave part of a hollow cylinder

[0138] 49a Hollow cylindrical wall

[0139] 50 Sliding Bearing Sleeve

[0140] 51 Nut

Claims

1. A valve for a flowable medium, the valve comprising a valve body (21) and an elongated closing mechanism (25) disposed in the valve body (21) and axially movable in a medium passage (20) of the valve by a controllable actuator, the closing mechanism abutting against a valve seat (22) in a closed position and simultaneously closing a discharge port (23) connected to the medium passage (20), the closing mechanism lifting off the valve seat (22) and releasing the discharge port in an open position, and the closing mechanism being connected to a sealing element for sealing the medium passage, i.e., to a portion of a hollow, elongated corrugated bellows (39) that moves together with the closing mechanism (25) in axial movement, the other portion of which is fixedly mounted in the valve, characterized in that: The axial relative position between the bellows (39) and the valve seat (22) is matched to the deviation between the actual length dimension and the rated length dimension of the bellows (39) used due to manufacturing conditions, so that the deviation is fully or partially compensated. In order to compensate for the deviation between the actual length dimension and the rated length dimension of the bellows (39), the valve has a compensation mechanism (44), the thickness of which affects the axial relative position between the bellows (39) and the valve seat (22).

2. The valve for a flowable medium according to claim 1, characterized in that: The closing mechanism (25) has an end that is sealed against the valve seat (22) in a closed position on the valve seat (22), the closing mechanism (25) extends through the medium passage (20) from this end, and the closing mechanism has another end arranged on the other side of the medium passage, the closing mechanism (25) being radially supported in the region of the other end by a guide that is not rotatably connected to the other end, the guide being arranged in the stationary sliding bearing sleeve of the valve and being axially movable in the sliding bearing sleeve while sliding against the sliding bearing sleeve.

3. The valve according to claim 1, characterized in that: The compensation mechanism is a spacer (45) arranged in a valve housing (21) between a bellows receiving portion (43) for the bellows (39) fluid-tightly connected to the bellows (39) and a support surface of the valve housing (21), the bellows receiving portion (43) being supported on or mounted on the support surface.

4. The valve according to claim 1, characterized in that: The corrugated pleated bladder (39) and the closure mechanism (25) are arranged coaxially in the medium channel (20).

5. The valve according to claim 4, characterized in that: The portion of the closure mechanism (25) is arranged inside the pleated ...

6. The valve according to claim 1, characterized in that: The medium channel (20) is defined at its end away from the valve seat (22) by a wall (37) in which a through hole (38) is formed. The closure mechanism (25) extends out of the medium channel (20) along the through hole. In order to seal the area between the closure mechanism (25) and the wall (37) surrounding the closure mechanism (38), a corrugated plenum (39) surrounds a portion of the closure mechanism (25) arranged in the medium channel (20), which extends at least into the through hole (38). The fixedly mounted portion of the corrugated plenum (39), i.e., the first end piece of the corrugated plenum, is fluid-tightly connected to the interface of the wall (37) configured for the through hole (38). The portion of the corrugated plenum (39) connected to the closure mechanism (25), i.e., the second end piece of the corrugated plenum, is fluid-tightly connected to the outer surface of the closure mechanism (25).

7. The valve according to claim 6, characterized in that, The surrounding connection surface of the wall (37) fluid-tightly connected to the first end piece of the corrugated pleated bladder (39) surrounds the through hole (38).

8. The valve according to claim 7, characterized in that: The second end piece of the corrugated pleated bladder (39) abuts against the outside of the connecting surface surrounding a portion of the closure mechanism (25) and is fluid-tightly connected to the connecting surface.

9. The valve according to claim 8, characterized in that: The fluid-tight connection between the first end piece of the corrugated pleated bladder (39) and the connection surface of the wall (37) and / or the connection between the second end piece of the corrugated pleated bladder (39) and a portion of the closure mechanism (25) is a laser-welded connection.

10. The valve according to claim 6, characterized in that: The wall (37) is the wall (37) of the corrugated pleated fovea receiving portion (43), and / or the through hole (38) extends coaxially with a portion of the closure mechanism (25) which is guided through the through hole (38).

11. The valve according to claim 3, characterized in that: The corrugated pleated receiving part (43) is integrally connected to the valve housing (21), or the corrugated pleated receiving part (43) is a separate component arranged in the valve housing (21).

12. The valve according to claim 1, characterized in that: The corrugated pleated bladder (39) is prestressed and supported in the medium passage (20) in the closed position of the valve.

13. The valve according to claim 1, characterized in that: The valve's closing force mechanism applies a closing force to the closing mechanism (25) in the closed position of the valve, acting in the direction of the valve seat (22).

14. The valve according to claim 13, characterized in that: In the closed position of the valve, in order to assist the subsequent opening movement caused by the opening force of the opening force mechanism, the bellows (39) applies an additional opening force to the closing mechanism (25) that is smaller than the closing force and acts in response to the closing force.

15. The valve according to claim 1, characterized in that: The valve's opening force mechanism applies an opening force to the closing mechanism (25) in the valve's open position.

16. The valve according to claim 15, characterized in that: To assist the subsequent closing motion of the closing mechanism (25) caused by the closing force of the valve, the corrugated plenum (39) applies an additional closing force that is smaller than the opening force and acts in response to the opening force.

17. The valve according to claim 1, characterized in that: In the open position of the closure mechanism (25) corresponding to half the stroke length of the closure mechanism (25), the corrugated pleated bladder (39) that moves together with the closure mechanism (25) is in a stress-free state.

18. The valve according to claim 1, characterized in that: The wall structure of the corrugated pleated sac (39) is multi-layered.

19. The valve according to claim 1, characterized in that: The controllable actuator capable of axially moving the closing mechanism (25) includes an electromagnet (26) with a coil (28), the closing mechanism (25) or an armature (33) connected to the closing mechanism (25) forming the core or armature of the electromagnet, wherein the closing mechanism (25) extends in the valve housing (21) from the end of the closing mechanism (25) abutting against the valve seat (22) in the closed position through the medium passage (20) and through the space surrounded by the coil (28) to the region on the other side of the coil (28).

20. The valve according to claim 19, characterized in that: The closing mechanism (25) is radially guided on at least two guide devices (29, 30), namely, on the first guide device (29) arranged adjacent to the valve seat (22) in the medium channel (20), and on or through the second guide device (30) arranged in the area on the other side of the coil (28).

21. The valve according to claim 20, characterized in that: The first and / or second guiding device (29, 30) has a guide member having a guide member section extending transversely to the axial direction, in which a guide member through hole is provided, through which the closing mechanism (25) extends.

22. The valve according to claim 21, characterized in that: The guide section of the first guide device (29) extending laterally to the axial direction has one or more additional through holes through which the medium of the medium channel (20) can flow toward the valve seat (22).

23. The valve according to claim 2, characterized in that: The closing mechanism (25) is radially guided on at least two guide devices (29, 30), namely, on the one hand, on a first guide device (29) arranged adjacent to the valve seat (22) in the medium channel (20), and on the other hand, on or through a second guide device (30) arranged in the area on the other side of the coil (28). The first and / or second guide devices (29, 30) have guide members with guide member sections extending transversely to the axial direction, in which guide member through holes are present. The closing mechanism (25) extends through the guide member through holes. The guide member that is non-rotatably connected to the closing mechanism (25) is the guide member of the second guide device (30).

24. The valve according to claim 2, characterized in that: The controllable actuator capable of axially moving the closing mechanism (25) includes an electromagnet (26) with a coil (28), the closing mechanism (25) or an armature (33) connected to the closing mechanism (25) constituting the core or armature of the electromagnet, wherein the closing mechanism (25) extends in the valve housing (21) from the end of the closing mechanism (25) abutting against the valve seat (22) in the closed position through the medium passage (20) and through the space surrounded by the coil (28) to the region on the other side of the coil (28), and a guide non-rotatably connected to the closing mechanism (25) is non-rotatably supported on or arranged on the armature (33) when abutting against the armature (33).

25. The valve according to claim 2, characterized in that: The guide component is made of high-grade alloy steel.

26. The valve according to claim 2, characterized in that: The stationary sliding bearing sleeve is made entirely or partially of a copper alloy containing or not containing aluminum, or the stationary sliding bearing sleeve is made entirely or partially of steel or high-grade alloy steel.

27. The valve according to claim 2, characterized in that: The stationary sliding bearing sleeve has a backing or backing layer made of steel or high-grade alloy steel and an anti-wear layer made of polymer.

28. The valve according to claim 1, characterized in that: The flowable medium is a liquid adhesive or glue.

29. The valve according to claim 2, characterized in that: The guide is constructed in a cap shape.

30. The valve according to claim 3, characterized in that: The spacer is disc-shaped or annular disc-shaped.

31. The valve according to claim 3, characterized in that: The support surface is configured to be circumferential.

32. The valve according to claim 4, characterized in that: The section of the closure mechanism (25) is rod-shaped.

33. The valve according to claim 6, characterized in that: The first end piece of the corrugated pleated bladder (39) is a hollow cylindrical shape.

34. The valve according to claim 6, characterized in that: The second end piece of the corrugated pleated bladder (39) is a hollow cylindrical shape.

35. The valve according to claim 6, characterized in that: The connecting surfaces of the wall (37) are constructed to be surrounding.

36. The valve according to claim 6, characterized in that: The outer surface of the closure mechanism (25) is configured to be surrounding.

37. The valve according to claim 7, characterized in that, The connecting surface of the wall (37) extends coaxially with the first end piece.

38. The valve according to claim 6, characterized in that, The wall (37) extends transversely to the axial direction.

39. The valve according to claim 14, characterized in that, The additional opening force applied to the closing mechanism (25) by the corrugated plenum (39) in the closed position of the valve is generated by prestress.

40. The valve according to claim 15, characterized in that, The opening force applied by the valve's opening force mechanism to the closing mechanism (25) is opposite to the closing force of the closing force mechanism.

41. The valve according to claim 16, characterized in that, The additional closing force applied by the corrugated pleated bladder (39) is generated by prestress.

42. The valve according to claim 21, characterized in that, The guide section extending laterally to the axial direction is configured in a disc shape.

Images