Valve for regulating a flow of a fluid

Abstract

The invention relates to a valve (1) for regulating a flow of a fluid between an inlet chamber (2) and an outlet chamber (3). The valve (1) has a valve body (4) which is movable by means of a slide (7) between a closed position and an open position, wherein the valve body (4) is provided to prevent the flow in the closed position and to enable it in the open position, wherein the slide (7) extends from the interior of the valve (1) through an opening to outside the valve (1), in order to be actuable from there. Furthermore, the valve (1) has a gaiter chamber (5) for receiving a gaiter (8) which is provided for sealing between the slide (7) and the opening, wherein a fluidic connection is established between the gaiter chamber (5) and the outlet chamber (3), in order to enable an equalization flow into the gaiter chamber (5) and out of the gaiter chamber (5), caused by a volume change within the gaiter chamber (5) on account of an actuation of the slide (7). The fluidic connection is established by means of an overflow element (61). The geometry of the valve (1) is designed in such a way that a direct impingement of particles, which pass into the gaiter chamber (5) by means of the equalization flow, on the gaiter (8) is prevented.

Description

[0001] Valve for regulating the flow of a fluid

[0002] The invention relates to a valve for regulating the flow of a fluid between an inlet chamber and an outlet chamber. Furthermore, the invention relates to an element that is a component of the valve.

[0003] Valves are known in the art. Such a valve typically has an inlet chamber and an outlet chamber, as well as a movable element, such as a valve body, which varies the flow through the valve, i.e., from the inlet chamber to the outlet chamber.

[0004] Such a valve 1*, known from the prior art, is shown for example in Figs. 5a and 5b. The valve 1* has a slide 7 for actuating a valve body 4. The slide 7 is guided by a guide and overflow element 6 in the form of a bushing. The bushing has openings to establish a fluidic connection between an outlet chamber 3 and a bellows chamber 5. The slide 7 is surrounded within the bellows chamber 5 by a bellows 8 to seal the bellows chamber 5 from the environment. The openings in the bushing for establishing the fluidic connection between the outlet chamber 3 and the bellows chamber 5 are provided to compensate for the volume change within the bellows chamber 5 when the slide 7 is actuated. If the slide 7 is shown in FIGS. 5a or 5b is moved downwards, the bellows 8 expands and displaces a larger volume of gas within the bellows chamber 5.In this case, gas flows from the bellows chamber 5 through the openings within the bushing into the outlet chamber 3. If the slide 7 is moved upwards with respect to the view in Fig. 5a or 5b, the bellows 8 shrinks and displaces a smaller volume of gas within the bellows chamber 5. In this case, gas flows from the outlet chamber 3 through the openings within the bushing into the bellows chamber 5.

[0005] Constructions according to the state of the art, in particular constructions as shown in Figs. 5a and 5b, have the following disadvantages:

[0006] Fig. 5a shows a streamline a. This streamline a characterizes the trajectory of a particle moving from the inlet chamber 2, past the open valve body 4, into the outlet chamber 3. Due to the particle's ballistic trajectory, it moves through the openings within the bushing (guide and overflow element 6) into the bellows chamber 5 and impacts the surface of the bellows 8. This can cause the bellows 8 and / or particles to ignite, particularly in an oxygen-rich atmosphere. Regardless of this, mechanical wear occurs on the bellows 8.

[0007] Fig. 5b shows a streamline b. This streamline b characterizes the flow path of a gas flow that occurs when the valve body 4 is open. When the valve body 4 is open, a gas flow generally flows from the inlet chamber 2 into the outlet chamber 3. Due to the vertical component (with respect to the illustration in Fig. 5b) of the flow, a portion of the flow moves through the openings within the bushing (guide and overflow element 6) into the bellows chamber 5 (through the opening shown on the left), and flows along streamline b back through the bushing (through the opening shown on the right) into the outlet chamber 3.

[0008] Fig. 5b shows a region M within which the flow changes direction along streamline b, thereby exerting a compressive force on the bellows 8 (from left to right in the illustration in Fig. 5b). This places stress on the material of the bellows 8, in particular on a welded joint that fastens the bellows 8 to the slide 7 (in the lower region of the bellows 8, based on the illustration in Fig. 5b).

[0009] Furthermore, Fig. 5b shows a region T within which the flow flows back into the outlet chamber 3 along the streamline b. The flow encounters a "main flow" of the fluid flowing from the inlet chamber 2 into the outlet chamber 3. The confluence of the flows creates a turbulent region or vortex, which reduces the performance of the valve 1* (the flow factor).

[0010] In general, any flow of fluid between the inlet chamber 2 and the bellows chamber 5 is undesirable unless a volume change occurs within the bellows chamber 5 due to movement of the slide 7. Such flows, for example, transfer undesirable conditions prevailing within the inlet chamber 2 (e.g., high temperatures) to the bellows chamber 5, thus affecting the sensitive bellows 8.

[0011] To solve the above problems, a valve and an element according to the independent claims are provided.

[0012] A valve is disclosed for regulating the flow of a fluid between an inlet chamber and an outlet chamber, comprising a valve body movable between a closed position and an open position by means of a slide, the valve body being provided to prevent flow in the closed position and to permit flow in the open position, the slide extending from the interior of the valve through an opening to the outside of the valve to be actuated from there, a bellows chamber for accommodating a bellows provided for sealing between the slide and the opening, a fluidic connection being established between the bellows chamber and the outlet chamber to permit compensating flow into and out of the bellows chamber caused by a volume change within the bellows chamber due to actuation of the slide,wherein the fluidic connection is established by means of an overflow element.,

[0013] According to the invention, the geometry of the valve is designed in such a way that direct impact of particles which enter the bellows chamber by means of the compensating flow on the bellows is prevented.

[0014] This prevents particles moving from the inlet chamber past the open valve body into the outlet chamber from moving into the bellows chamber due to their ballistic trajectory and impacting the bellows. Either the geometry of the valve prevents the particles from penetrating the bellows chamber, or the particles are slowed down, reducing their kinetic energy. This prevents ignition of the particle and / or the bellows, especially in an oxygen-rich atmosphere. Furthermore, mechanical wear on the bellows caused by particle impacts is reduced.

[0015] Furthermore, the feature according to the invention prevents or at least reduces a flow of fluid between the outlet space and the bellows space when no volume change occurs within the bellows space due to a movement of the slide.

[0016] This reduces vortices within the outlet space (at the point of potential collision of flow from the bellows space into the outlet space and "main flow" from the inlet space into the outlet space), thereby improving the performance of the valve (the flow factor).

[0017] Furthermore, undesirable influences within the inlet chamber and / or outlet chamber (e.g. high temperatures) are not transmitted or at least are transmitted with a delay to the bellows chamber and thus to the sensitive bellows.

[0018] Furthermore, fluid flows within the bellows chamber, which act on the bellows and exert forces and / or (bending) moments on it and thereby place mechanical stress on the bellows, are prevented or at least reduced.

[0019] Furthermore, a valve is disclosed, wherein the geometry for preventing particles from directly impinging on the bellows is implemented by at least one deflection within the overflow element, and / or is implemented in that the transition between the overflow element and the bellows space is not aligned with the bellows.

[0020] Furthermore, a valve is disclosed, wherein the deflection is formed by an overflow element within an element which guides the slide.

[0021] These latter features allow the overflow element to be manufactured cost-effectively and easily. Furthermore, a modular valve can be provided, in which the element can be adapted and replaced as required to meet the individual requirements of the valve.

[0022] Furthermore, a valve is disclosed, wherein the non-aligned orientation of the transition is made possible by an overflow element which is arranged outside a guide element which is provided for guiding the slide.

[0023] This provides an alternative embodiment of the invention.

[0024] In addition, a valve is disclosed, wherein the overflow element is formed by means of at least one channel, in particular by means of one or more channels, wherein the geometry for preventing particles from directly impinging on the bellows is implemented by a deflection within the at least one channel, which in particular extends essentially in a straight line, wherein the overflow element forms a shoulder for the deflection, which extends partially into a cross-sectional area of ​​the channel, wherein the shoulder borders the bellows chamber. This advantageously enables an advantageously simple manufacture of the overflow element despite the deflection being enabled by the shoulder, wherein in particular only one bore or the like is required for each channel. More complex manufacturing processes can advantageously be dispensed with. This advantageously enables a cost-effective design.Furthermore, an advantageously rapid manufacturing process can be achieved. Preferably, the shoulder extends obliquely, preferably substantially perpendicularly, to a longitudinal extent of the slide, the bellows chamber, or the bellows. Preferably, the shoulder extends obliquely, preferably substantially perpendicularly, to a longitudinal extent of the channel adjacent to the shoulder, from the outlet chamber to the shoulder. Preferably, the shoulder extends into the cross-sectional area of ​​the channel, at least for a large part of the cross-sectional area.

[0025] In particular, the cross-sectional area of ​​the channel extends perpendicular to a longitudinal extension of the respective channel. Preferably, the shoulder directly borders an inner surface defining the bellows chamber.

[0026] In particular, the channel merges into the bellows chamber at the shoulder. It is conceivable for the overflow element to be formed by a plurality of channels, with the overflow element preferably forming a shoulder at each of the channels for the deflection. Alternatively, it is conceivable for the channels to be at least partially merged into a few channels, with the merged channels / channels each delimiting a shoulder.

[0027] Furthermore, a valve is disclosed, wherein the overflow element is formed within a holding element of the valve which delimits the bellows chamber and at least partially surrounds the bellows. The guide element is usually subjected to heavy loads during operation of the valve and can also be designed to be relatively compact. By designing the overflow element in the holding element, the guide element can advantageously be manufactured simply and inexpensively, and replacing the guide element is therefore also possible inexpensively. In addition, deformations or the like caused by the manufacture of the overflow element are significantly less critical on the holding element than on the guide element, which contributes to the smooth movement of the slide. Preferably, the holding element is provided to hold the guide element. Preferably, the guide element is arranged on the holding element in a form-fitting and / or force-fitting manner.It is conceivable that the holding element is designed as part of a cover of the valve or as a separate component of the valve, such as an insert or similar for an arrangement on the cover.

[0028] Furthermore, a valve is disclosed which comprises a housing body, in particular at least largely forming the inlet chamber and the outlet chamber, which housing body comprises at least one cover, wherein the cover comprises the opening for the slide, wherein the geometry for preventing particles from directly impinging on the bellows is implemented by at least one deflection within the overflow element, wherein the overflow element is formed within the cover, wherein the cover with the overflow element projects into the outlet chamber and at least largely encloses the bellows. A design of the overflow element independent of other components of the valve can be enabled, wherein in particular a selection / geometry of a guide for the slide and / or a holder can advantageously be carried out independently of the overflow element. In particular, the cover with the guide element forms the bellows chamber.Preferably, the overflow element, designed as at least one channel, extends through an inner wall of the cover that defines the outlet chamber and the bellows chamber. In particular, the guide element is held on the cover in a force-fitting and / or form-fitting manner, in particular directly or via an insert, or is formed integrally with the cover.

[0029] Furthermore, a valve is disclosed, wherein the overflow element is formed by at least one channel extending essentially linearly from the outlet chamber to an inner wall bounding the bellows chamber. This enables advantageously simple and cost-effective production of the overflow element, for example, by a single bore for each channel. Alternatively, it is conceivable for the channel to be curved and / or kinked in sections or completely.

[0030] Furthermore, a valve is disclosed which comprises a guide element which is provided for guiding the slide, and an insert part which is provided for holding the guide element, wherein the overflow element is formed by means of at least one channel which extends through the insert part into the bellows chamber, wherein the insert part completely delimits an inlet opening of the channel and an outlet opening of the channel, wherein the channel is delimited in sections by an inner surface of the insert part and an outer wall of the guide element. An advantageously modular design of the valve can be enabled, which is advantageously designed independently of a design of the guide element. The insert part can be manufactured cost-effectively and can be easily replaced if a modification or removal of the overflow element is required. Both the cover and theBoth the holding element and the guide element can advantageously be used unchanged in various valve designs, with or without an overflow element. This enables an advantageously cost-effective and function-rich modular system for the valve. An advantageously compact design of the insert can be achieved because the wall thickness of the insert only limits the channel on one side. This allows the geometry of the overflow element and / or the valve components surrounding the insert to be advantageously designed flexibly for a wide range of sizes. The outer wall of the guide element is preferably formed on an outer side of the guide element facing away from the slide. The outer wall of the guide element is preferably substantially cylindrical. In particular, the outer wall of the guide element is substantially recess-free, at least in a region delimiting the channel.Preferably, the channel is completely delimited by the insert part in a region of the inlet opening and in a region of the outlet opening, wherein in particular the channel is delimited in an intermediate region, in particular between the inlet opening and the outlet opening, by an inner surface of the insert part and an outer wall of the guide element. Preferably, the inlet opening and the outlet opening each have a central axis. Preferably, the channel extends in the region of the inlet opening substantially parallel to the central axis of the inlet opening. Preferably, the channel extends in the region of the outlet opening substantially parallel to the central axis of the outlet opening. Particularly preferably, the channel extends in the intermediate region obliquely and / or substantially perpendicular to the central axis of the inlet opening and / or to the central axis of the outlet opening. In particular, the channel is kinked or bent from the inlet opening to the intermediate region.In particular, the channel is bent or curved from the intermediate region to the outlet opening. The channel is preferably curved in the intermediate region. The insert part preferably forms a recess for receiving the guide element. Particularly preferably, the inner surface of the insert part that defines the channel borders an inner wall of the insert part that borders the recess. The insert part is preferably designed such that the channel in the intermediate region extends at least partially around a central axis of the insert part, in particular the recess. The insert part is preferably designed such that the intermediate region of the channel extends over an angle of at least 30°, preferably at least 90° and particularly preferably at least 120°, around the central axis.Alternatively, a design is conceivable wherein the overflow element and the cover are formed as one piece, i.e., in particular, spaced apart from the insert, wherein the channel is preferably formed between the guide element and a retaining element or the cover. In particular, in this alternative design, the channel extends within the retaining element or the cover and is delimited in the intermediate region by an outer wall of the guide element and an inner surface of the retaining element or the cover. Furthermore, a valve is disclosed wherein a shielding element is arranged between the overflow element and the bellows in order to prevent particles, which enter the bellows chamber by means of the compensating flow, from directly impinging on the bellows.

[0031] This provides an alternative embodiment of the invention.

[0032] Furthermore, a valve is disclosed, wherein the overflow element is formed by means of a single channel, which is preferably deflected at least twice, more preferably in each case at right angles.

[0033] This enables simple and cost-effective production of the valve and in particular of the overflow element or element.

[0034] Furthermore, a valve is disclosed, wherein the overflow element is designed with a length to opening cross-sectional ratio greater than 1.

[0035] This ensures optimal functionality of the construction.

[0036] Furthermore, a valve is disclosed, wherein the overflow element is designed in a labyrinth-like manner.

[0037] This ensures optimal functionality of the construction and provides an alternative design.

[0038] Furthermore, a valve is disclosed, wherein the overflow element is manufactured by means of an additive process.

[0039] This enables a wide range of design alternatives as well as a technically optimized shape of the overflow element.

[0040] Various embodiments of the invention are illustrated in the figures and explained in more detail below. They show:

[0041] Fig. 1 A sectional view of a valve 1 according to the invention.

[0042] Fig. 2a A detailed view of an element 61 according to the invention. Fig. 2b Another detailed view of the element 61 according to the invention from Fig. 2a.

[0043] Fig. 3 A sectional view of a valve 1 according to the invention in an alternative embodiment.

[0044] Fig. 4 A sectional view of a valve 1 according to the invention in an alternative embodiment.

[0045] Fig. 5a A sectional view of a valve 1* according to the prior art.

[0046] Fig. 5b A sectional view of a valve 1* according to the prior art.

[0047] Fig. 6 A sectional view of a valve 1 according to the invention in a further alternative embodiment.

[0048] Fig. 7 A sectional view of a valve 1 according to the invention in a further alternative embodiment.

[0049] Fig. 8 A sectional view of a valve 1 according to the invention in a further alternative embodiment.

[0050] The figures contain partially simplified, schematic representations. In some cases, identical reference symbols are used for identical, but possibly not identical, elements. Different views of identical elements may be scaled differently.

[0051] Directional information such as “left”, “right”, “top” and “bottom” are to be understood with reference to the respective figure and can vary in the individual representations compared to the object shown. Figure 1 shows a valve 1 according to the invention. The valve has an inlet chamber 2 and an outlet chamber 3. A pressure p1 prevails in the inlet chamber 2, and a pressure p2 prevails in the outlet chamber, where p1>p2. A valve body 4 is arranged between the inlet chamber 2 and the outlet chamber 3 and is intended to reversibly establish and interrupt a fluidic connection between the inlet chamber 2 and the outlet chamber 3. For this purpose, the valve body 4 is moved up and down by means of a slide 7. The slide 7 is guided axially by an element 61 and emerges from the upper region of the valve 1 in order to be actuable from the surroundings of the valve 1.

[0052] In order to seal the interior of the valve 1 at the transition of the slide 7 from the interior of the valve 1 to the surroundings of the valve 1 (see the upper area of ​​the illustration in Fig. 1) from the outside, a bellows 8 is provided. When the slide 7 is actuated, the bellows 8 changes its shape by expanding and contracting in the axial (vertical) direction. The bellows 8 is arranged within a bellows chamber 5 and, through the aforementioned expansion and contraction, changes the volume displaced within the bellows chamber 5. If this creates a negative or positive pressure within the bellows chamber 5, this pressure counteracts the actuation of the slide 7, which is undesirable. For this reason, pressure equalization of the bellows chamber 5 is ensured by means of a fluidic connection between the bellows chamber 5 and the outlet chamber 3, established by the element 61. The specific design of the element 61 is discussed in Figures 2a and 2b. However, in Fig.1 that a connecting channel is provided within the element 61 between the bellows chamber 5 and the outlet chamber 3. This connecting channel does not run in a straight line, but has (referring to Fig. 1) a vertical section in order to be in fluidic contact with the bellows chamber 5 and the outlet chamber 3, respectively, and a horizontal section to connect the two vertical sections.

[0053] This design double-diverts a compensating flow between bellows chamber 5 and outlet chamber 3, which brings with it various advantages. Among other things, it prevents particles within the flow between inlet chamber 2 and outlet chamber 3 from penetrating unhindered into bellows chamber 5 and striking the surface of bellows 8. Furthermore, flow between bellows chamber 5 and outlet chamber 3 is prevented when no actuation 7 of the slide valve takes place. This reduces eddies within outlet chamber 3 (explained above), furthermore, undesirable influences within inlet chamber 2 and / or outlet chamber 3 are not transmitted to bellows chamber 5 or are at least transmitted with a delay (also explained above), and mechanical stress on bellows 8 due to fluid flows within bellows chamber 5 is reduced (also explained above).

[0054] Figs. 2a and 2b show the element 61 from Fig. 1 in detail, with Fig. 2b showing the component from Fig. 2a seen from the side (folded).

[0055] The fluidic connection between bellows chamber 5 and outlet chamber 3 is formed by an overflow element 61d in the form of a channel with three sections. The channel is formed by bores, with a through-bore extending horizontally (referring to Fig. 2a) and a blind bore each fluidically connecting the through-bore to the bellows chamber 5 and the outlet chamber 3.

[0056] Fig. 3 shows an alternative embodiment of the invention. This differs from the embodiment in Fig. 1 in that instead of element 61, a guide element 62 is now provided, which guides the slide 7 axially but does not provide an overflow possibility between the outlet chamber 3 and the bellows chamber 5. In this embodiment, the overflow possibility is created by an overflow element 63 in the form of a through-bore being provided in a housing section of the valve 1. This bore is aligned such that the bore axis is arranged such that it is not directed towards the bellows 8. This prevents particles from the outlet chamber 3 from moving into the bellows chamber 5 and striking the surface of the bellows 8 without braking.

[0057] Fig. 4 shows an alternative embodiment of the invention. This differs from the embodiment in Fig. 1 in that a guide and overflow element 6 according to the prior art is provided for axially guiding the slide 7 and for creating an overflow possibility between the outlet chamber 3 and the bellows chamber 5.

[0058] To protect the bellows 8, in this embodiment, a shielding element 64 is provided radially encircling the slide axis, which is arranged locally between the guide and overflow element 6 and the bellows 8. The shielding element 64 is immovable with respect to the slide 7 and is attached to it.

[0059] Figs. 5a and 5b show valves 1* according to the state of the art. These were acknowledged in the description manual.

[0060] Figure 6 shows a further alternative embodiment of the invention, wherein the overflow element 65 forms shoulders 70, each of which defines a channel 77 and causes a deflection when a medium flows into the bellows chamber 5. The overflow element 65 is formed by means of a plurality of channels 77. The geometry for preventing particles from directly impinging on the bellows 8 is implemented by a deflection within the essentially rectilinearly extending channels 77. The overflow element 65 forms shoulders 70 for the deflection, each of which extends partially into a cross-sectional area of ​​one of the channels 77. The shoulders 70 each border the bellows chamber 5, wherein in particular an inner surface forming the respective shoulder 70 borders an inner wall delimiting the bellows chamber 5. The inner surfaces forming the shoulders are part of the overflow element 65.The overflow element 65 is formed by a holding element 71, which is provided for holding the guide element 62. The guide element 62 is held positively and / or non-positively on the holding element 71. The holding element 71 is in particular formed integrally with a cover 69 of the valve 1. The cover 69 or the holding element 71 delimits the bellows chamber 5 towards the outlet chamber 3. The channels 77 extend essentially in a straight line from the outlet chamber 3 to an inner wall of the holding element 71 or the cover 69, which inner wall delimits the bellows chamber 5. The valve 1 comprises a housing body, which at least largely forms the outlet chamber 3 and the inlet chamber 2. The cover 69 delimits the outlet chamber 3 at the top. The cover 69 comprises the opening for the slide 7. The overflow element 65 is formed within the cover 69. The cover 69 with the overflow element 65 projects into the outlet chamber 3 and encloses the bellows 8 at least for the most part.The channels 77 are formed at a distance from the guide element 62. The channels 77 each extend substantially parallel to a longitudinal extension of the bellows 8 and the slide 7.

[0061] Figure 7 shows a further alternative embodiment of the invention, wherein the overflow element 66 is formed as part of an insert 68 which holds a guide element 62 for guiding the slide 7. The overflow element 66 is formed by a plurality of essentially rectilinear channels 77b which extend from the outlet chamber 3 into the bellows chamber 5. The channels 77b are spaced from the guide element 62. Figure 8 shows a further alternative embodiment of the invention, wherein the overflow element 67 is formed as a channel 77c which extends within an insert 68 or a holding element 71 of the valve 1 from the outlet chamber 3 into the bellows chamber 5. The guide element 62 is held positively and / or non-positively on the insert 68 or the holding element 71. In particular, the insert part 68 is designed as a holding element 71 for holding the guide element 62.The insert part 68 is inserted into the housing body of the valve 1, wherein a seal is arranged, in particular on an outer edge of the insert part 68, to provide a fluid-tight separation between the outlet chamber 3 and an upper side of the insert part 68. A cover 69 of the housing body is provided, in particular, to delimit the bellows chamber 5 at the top and to close off the housing body, with the exception of the opening for the slide 7. The channel 77c forms a plurality of deflections. The channel 77c comprises an intermediate region 72, wherein the channel 77c is delimited in the intermediate region 72 by an inner surface 75 of the insert part 68 and an outer wall 76 of the guide element 62. The channel 77c extends through the insert part 68 into the bellows chamber 5, wherein the insert part 68 completely delimits an inlet opening 73 of the channel 77c and an outlet opening 74 of the channel 77c.The channel 77c is delimited in sections, particularly in the intermediate region 72, by the inner surface 75 of the insert 68 and the outer wall 76 of the guide element 62. The outer wall 76 of the guide element 62 is formed on an outer side of the guide element 62 facing away from the slide 7. The outer wall 76 of the guide element 62 is essentially cylindrical. The outer wall 76 of the guide element 62 is essentially recess-free in a region delimiting the channel 77c, particularly in the intermediate region 72. The inlet opening 73 and the outlet opening 74 each have a central axis. In the region of the inlet opening 73, the channel 77c extends essentially parallel to the central axis of the inlet opening 73. In the region of the outlet opening 74, the channel 77c extends essentially parallel to the central axis of the outlet opening 74.The central axes of the inlet opening 73 and the outlet opening 74 each extend parallel to the longitudinal extent of the bellows 8 and the slide 7. The channel 77c extends in the intermediate region 72 essentially perpendicular to the central axes of the inlet opening 73 and the outlet opening 74 or to the slide 7. The channel 77c is bent from the inlet opening 73 to the intermediate region 72 and from the intermediate region 72 to the outlet opening 74. In the intermediate region 72, the channel 77c is bent around the slide or the guide element 62. The insert 68 forms a recess for receiving the guide element 62. Particularly preferably, the inner surface 75 of the insert 68 defining the channel 77c borders an inner wall of the insert 68 defining the recess.The insert 68 is designed such that the channel 77c in the intermediate region 72 extends at least partially around a central axis of the insert 68, in particular the recess. The insert 68 is designed such that the intermediate region 72 of the channel 77c extends over an angle of substantially 180° around the central axis, the guide element 62, or the washer 7.

[0062] Alternative configurations of the overflow element 67 are also conceivable, for example, with more than one channel 77c, each of which extends, in particular, at a smaller angle around the central axis, the guide element 62, or the disk 7. Alternatively or additionally, a configuration is conceivable in which the overflow element 67 and the cover 69 are formed in one piece (analogous to the configurations shown in Figures 3 and 6), wherein the channel 77c is preferably formed between the guide element 62 and a retaining element 71 or the cover 69.

[0063] List of reference symbols Valve 72 Intermediate area* Valve (position of the 73 Inlet opening

[0064] Technology) 74 Outlet opening Inlet chamber 75 Inner surface Outlet chamber 76 Outer wall Valve body 77 Channel Bellows chamber 77b Channel Guide and 77c Channel

[0065] Overflow element 7 Slide 1 Element 8 Bellows 1 d Overflow element 2 Guide element a Streamline for 3 Overflow element Representation of a 4 Shielding element particle impact 5 Overflow element b Streamline for 6 Overflow element Representation of a 7 Overflow element torque range M 8 Insert and a turbulence range 9 Cover T 0 Shoulder M torque range 1 Retaining element T turbulence range

Claims

Claims 1. A valve (1) for regulating a flow of a fluid between an inlet chamber (2) and an outlet chamber (3), comprising a valve body (4) movable between a closed position and an open position by means of a slide (7), the valve body (4) being designed to prevent flow in the closed position and to permit flow in the open position, the slide (7) extending from the interior of the valve (1) through an opening to the outside of the valve (1) in order to be actuated from there, a bellows chamber (5) for accommodating a bellows (8) provided for sealing between the slide (7) and the opening, a fluidic connection being established between the bellows chamber (5) and the outlet chamber (3) to permit a compensating flow into and out of the bellows chamber (5),caused by a volume change within the bellows chamber (5) due to an actuation of the slide (7), wherein the fluidic connection is established by means of an overflow element (61, 61 d, 63, 65, 66, 67), characterized in that the geometry of the valve (1) is designed such that a direct impact of particles which enter the bellows chamber (5) by means of the compensating flow on the bellows (8) is prevented.

2. Valve (1) according to the preceding claim, wherein the geometry for preventing the direct impact of Particles onto the bellows (8) by at least one deflection within the overflow element (61 d, 65, 67) and / or is implemented in that the transition between the overflow element (61 d, 65, 67) and the bellows space (5) is not aligned with the bellows (8).

3. Valve (1) according to the preceding claim, wherein the deflection is formed by an overflow element (61d) within an element (61) which guides the slide (7).

4. Valve (1) according to claim 2, wherein the non-aligned orientation of the transition is made possible by an overflow element (63, 65, 66, 67) which is arranged outside a guide element (62) provided for guiding the slide (7).

5. Valve (1) according to one of the preceding claims, wherein the overflow element (65) is formed by means of at least one channel (77), wherein the geometry for preventing particles from directly impinging on the bellows (8) is implemented by a deflection within the at least one channel (77), in particular one which extends essentially in a straight line, wherein the overflow element (65) forms a shoulder (70) for the deflection, which extends partially into a cross-sectional area of ​​the channel (77), wherein the shoulder (70) borders on the bellows space (5).

6. Valve (1) according to one of the preceding claims, wherein the overflow element (61 d, 65, 66, 67) is formed within a retaining element (71 ) of the valve (1) which delimits the bellows space (5) and which surrounds the bellows (8) and / or the bellows space (5) at least partially surrounds.

7. Valve (1) according to one of the preceding claims, with a housing body which comprises at least one cover (69), wherein the cover (69) comprises the opening for the slide (7), wherein the geometry for preventing particles from directly impinging on the bellows (8) is implemented by at least one deflection within the overflow element (63, 65), wherein the overflow element (63, 65) is formed within the cover (69), wherein the cover (69) with the overflow element (63, 65) projects into the outlet space (3) and at least largely encloses the bellows (8).

8. Valve (1) according to one of the preceding claims, wherein the overflow element (63, 65, 66) is formed by means of at least one channel (72b) which extends substantially rectilinearly from the outlet space (3) to an inner wall delimiting the bellows space (5).

9. Valve (1) according to one of the preceding claims, with a guide element (62) which is provided for guiding the slide (7), and with an insert part (68) which is provided for holding the guide element (62), wherein the overflow element (67) is formed by means of at least one channel (77c) which extends through the insert part (68) into the bellows chamber (5), wherein the insert part (68) each completely delimits an inlet opening (73) of the channel (77c) and an outlet opening (74) of the channel (61d), wherein the channel (77c) is delimited in sections by an inner surface (75) of the insert part (68) and an outer wall (76) of the guide element (62).

10. Valve (1) according to one of the preceding claims, wherein a shielding element (64) is arranged between the overflow element and the bellows (8) in order to prevent particles which enter the bellows chamber (5) by means of the compensating flow from directly striking the bellows (8).

11. Valve (1) according to one of the preceding claims, wherein the overflow element (61, 61d, 67) is formed by means of a single channel (61d, 77c), which is preferably deflected at least twice, more preferably in each case at right angles.

12. Valve (1) according to the preceding claim, wherein the overflow element (61, 61d, 63, 65, 66, 67) is designed with a length to opening cross-sectional ratio greater than 1.

13. Valve (1) according to the preceding claim, wherein the overflow element (61, 61d, 63, 67) is labyrinth-shaped.

14. Valve (1) according to one of claims 3 or 5 to 13, wherein the overflow element (61, 67) is manufactured by means of an additive process.

15. Overflow element (61, 61d, 63, 65, 66, 67) from a valve (1) according to one of claims 3 or 5 to 14.

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