valve

Abstract

The invention relates to a valve (1) comprising a valve housing (2) and a shut-off element (3), wherein the valve housing (2) has a cavity (4) for accommodating the shut-off element (3), an inlet opening (5) for the inflow of a fluid into the cavity (4) and an outlet opening (6) for the outflow of the fluid from the cavity (4), wherein the shut-off element (3) has a guide body (7) and is arranged at least partially linearly movably in the cavity (4) of the valve housing (2) between the inlet opening (5) and the outlet opening (6), wherein the shut-off element (3) has at least one recess (8) for the flow of the fluid from the inlet opening (5) to the outlet opening (6) via the recess (8).

Description

TECHNICAL FIELD

[0001] The invention relates to a valve comprising a valve housing and a shut-off element, wherein the valve housing comprises a cavity for accommodating the shut-off element, an inlet opening for a fluid flow into the cavity and an outlet opening for a fluid flow out of the cavity, wherein the shut-off element comprises a guide body and is arranged at least partially linearly movable in the cavity of the valve housing between the inlet opening and the outlet opening. BACKGROUND

[0002] In many technical manufacturing processes it is desirable to operate on a continuous flow basis using always full and / or partially filled material supply lines. One example of this is the manufacturing of shaped cellulose products, such as fibers, foils, films, from renewable raw material cellulose. In this manufacturing process, the shaped cellulose products are manufactured by forming a cellulose solution in an organic solvent and by spinning the cellulose / solution melt to form fibers or films. The preferred form of the solvent is a tertiary amine-N-oxide, usually N-methylmorpholine N-oxide (NMMO). These cellulose solutions are usually highly viscous, typically having a viscosity of 50,000 to 10,000,000 mPas. This cellulose solution manufacturing process is described in EP 0 356 419 B1. One problem of cellulose solution processing is the high processing temperature required (typically 80°C to 130°C) and the instability of the cellulose solution at these temperatures. It is therefore desirable to run without dead zones and without stagnation.

[0003] Various forms of valves are known in the prior art. DE 38 15 897 C2 discloses a start valve throttle unit with a discharge channel, which has a widening to the discharge channel of the extrusion tool. In the housing of the start valve throttle unit a guide and start bore is provided, in which the start valve and the throttle valve body are arranged displaceably and rotatably in the direction of their longitudinal axis transverse to the axis of the discharge channel. The start and throttle valve body has two closure sections, between which the throttle valve body is arranged. On the inner closure section, on the side away from the throttle valve body, the start valve body is formed. This should be sealed on the one hand and on the other hand leave a start discharge opening in the bore, which leads from the valve throttle housing to the outside. Other valves are known, for example, from DE 27 51 225, DE 10 2007 047 726 and DE 10 2005 037 268.

[0004] Furthermore, US 3,817,668 and US 3,746,481 describe melt pumps using a gear wheel as a means of controlling the flow of fluid. However, these have proven to be unsuitable for the introduction, distribution, flux control of hot liquids, in particular hot plastic liquid melts, and cannot be used as switching and / or deflection distribution valves. SUMMARY

[0005] The object of the present invention is to improve or eliminate at least individual disadvantages of the prior art. The object of the present invention is in particular to provide a valve in which the fluid flow is improved.

[0006] The object is achieved by a valve comprising a valve housing and a shut-off element, wherein the valve housing comprises a cavity for accommodating the shut-off element, an inlet opening for a fluid flow into the cavity and an outlet opening for a fluid flow out of the cavity, wherein the shut-off element comprises a guide body and is at least partially linearly movably arranged in the cavity of the valve housing between the inlet opening and the outlet opening, wherein the shut-off element has at least one recess for a fluid flow from the inlet opening to the outlet opening via the recess.

[0007] The shut-off element thus comprises at least one recess for fluidly connecting the inlet opening to the outlet opening. Fluidly connecting in this case means that fluid can flow from the inlet opening to the outlet opening. The recess of the shut-off element is thus a flow-through recess, which enables fluid to flow between the inlet opening and the outlet opening, thus opening the outlet opening. The shut-off element is at least partially arranged in the cavity of the valve housing between the inlet opening and the outlet opening, such that the shut-off element is at least partially positioned in the direction in which fluid flows in the cavity between the inlet opening and the outlet opening. The linear displacement of the shut-off element by linear movement of the shut-off element causes the fluid connection of the inlet opening to the outlet opening to be cut off, and fluid flowing from the inlet opening into the cavity of the valve housing is prevented from further flowing to the outlet opening by the shut-off element. As a result, the outlet opening is shut off and closed by the shut-off element. The linear movement of the shut-off element comprising the recess is continuously completed, such that the outlet opening to be shut off can be variably shut off between 0 and 100%. Fluid flowing through the outlet opening can thus be continuously regulated.

[0008] The recess of the shut-off element is a recess which reduces the cross section of the shut-off element with respect to a section of the shut-off element adjacent to the recess. This adjacent section seals the cavity when arranged in the cavity, such that fluid flowing into the cavity via the inlet opening is prevented from flowing to the outlet opening, whereby the outlet opening is shut off by the shut-off element. If the shut-off element is moved such that the recess and not the adjacent section is arranged in the cavity, the shut-off element does not seal the cavity due to the smaller cross section in the area of the recess, such that at least one opening fluidly connecting the inlet opening to the outlet opening is formed by the recess in the cavity. Fluid can flow from the inlet opening to the outlet opening via this at least one opening. Due to the continuous movement of the shut-off element, the recess can be partially arranged in the cavity, such that the at least one opening formed by the recess is formed only by the portion of the recess arranged in the cavity, whereby the size of the opening can be varied by varying the proportion of the recess arranged in the cavity.

[0009] The recess can for example occupy 5 to 95 %, preferably 10 to 90 % or 20 to 80 % or 30 to 70 % of the cross-sectional area perpendicular to the longitudinal axis of the shut-off element (linear movement direction) compared to the cross-sectional area of the adjacent section. This cross-sectional area of the recess is in particular given at the largest point on the longitudinal axis of the recess, in particular in the case of a gradual increase of the recess compared to the adjacent section. A recess which is preferably in the form of a cone preferably occupies more than 10 %, in particular more than 20 % of the cross-sectional area in the flow direction, i.e. in this case the shut-off element comprises less than 90 % or less than 80 % of the cross-sectional area, wherein the cone or guide body is preferably rotationally symmetrical in the conical region.

[0010] The valve according to the application can be used for dead-zone-free feeding, removal, switching and / or delivery limitation of highly viscous liquids and / or melts. Due to the special construction of the shut-off element, the valve can be used in the respective manufacturing process for highly viscous liquids and melts in the field of partially crystalline high-performance thermoplastics, such as PEK (polyether ketone), PPEK (polyphthalazinone ether ketone), PPS (polyphenylene sulfide) or amorphous high-performance thermoplastics, such as PAI (polyamide-imide), PPSU (polyphenylsulfone), PSU (polysulfone) or PES (polyether sulfone). The valve according to the application can also be used in the manufacturing process for partially crystalline and amorphous thermoplastics, such as PA (polyamide), PA 6 (polyamide 6; polyamide from caprolactam), PA 66 (polyamide 66; polyamide from hexamethylenediamine), PBT (polybutylene terephthalate), POM (polyoxymethylene), PET (polyethylene terephthalate), PP (polypropylene), PE (polyethylene), PTFE (polytetrafluoroethylene). Such methods and manufacturing processes generally include extrusion, injection molding, blow molding, coating and spraying techniques, such as for example the manufacture of synthetic textile fibers, plastic hoses, plastic foils and films and protective and / or insulating coatings for electrical conductors.

[0011] Preferably, the valve according to the application is used in the manufacture of cellulose or in lines for the delivery of cellulose solutions. Particularly preferably, the valve according to the application is used for the delivery of cellulose solutions which are used as extrusion media in a shaping process. In this case, the cellulose concentration is selected to be of the order of magnitude customary for the Lyocell process. The cellulose concentration in the cellulose solution can thus be 4 to 23 %, preferably 6 to 20 %, in particular 8 to 18 % or 10 to 16 % (all % information in mass %).

[0012] Preferably the solvent of the cellulose solution is a tertiary amine oxide (amine-N-oxide), particularly preferred is N-methylmorpholine N-oxide. Alternatively or additionally, it can be an ionic solvent. Such ionic solvents are described, for example, in WO 03 / 029329; WO 2006 / 000197 Al; Parviainen et al., RSC Adv., 2015, 5, 69728-69737; Liu et al., Green Chem. 2017, DOI: 10.1039 / c7gc02880f; Hauru et al., Cellulose (2014) 21 :4471-4481; Fernandez et al., J Membra Sci Technol 2011, S:4; and the like and preferably contain organic cations, such as, for example, ammonium cations, pyrimidinium cations or imidazolium cations, preferably 1,3-dialkylimidazolium salts such as halides. Here also water is used, preferably as a non-solvent for cellulose. Particularly preferred are solutions of cellulose and butyl-3-methylimidazolium (BMIM), for example with chloride as counterion (BMIMCI), or 1-ethyl-3-methyl-imidazolium (also preferred as chloride, acetate or diethylphosphate) or 1-hexyl-3-methylimidazolium or 1-hexyl-1-methylpyrrolidinium (preferably with bis(trifluoromethylsulfonyl)amide anion) and water. Other ionic solvents are 1,5-diazabicyclo[4.3.0]-5-noneneium, preferably acetate; 1-ethyl-3-methylimidazolium acetate, 1.3-dimethylimidazolium acetate, 1-ethyl-3-methylimidazolium chloride, 1-butyl 3-methylimidazolium acetate, 1-ethyl-3-methylimidazolium diethylphosphate, 1-methyl-3-methylimidazolium dimethylphosphate, 1-ethyl-3-methylimidazolium formate, 1-ethyl-3-methylimidazolium octanoate, 1,3-diethylimidazolium acetate and 1-ethyl-3-methylimidazolium propionate.

[0013] According to a preferred embodiment, the guide body of the shut-off element is prismatic, preferably substantially cylindrical. As a result, the shut-off element can be moved linearly in the cavity along the longitudinal direction of the guide body. Furthermore, the shut-off element can be manufactured simply. In this case, the recess is a cut-out in the prismatic guide body, such that the equal cross-section of the prismatic guide body perpendicular to the longitudinal axis is smaller in the region of the recess. As a result, in the region of the recess, the smaller cross-section is shut off by the shut-off element, so that the fluid can pass through the shut-off element and flow to the discharge opening.

[0014] According to a particularly preferred embodiment, the recess is conical in the guide body, wherein the conicity is preferably arranged perpendicular to the longitudinal axis of the (prismatic) guide body. Thus, the recess forms a groove extending around the guide body perpendicular to the longitudinal axis, along which groove the fluid can flow around the shut-off element transversely to the longitudinal axis of the prismatic guide body. As a result, the fluid can flow via the inlet opening into the cavity of the valve housing and further along the conicity to the outlet opening. The groove preferably has a cross-section defined by a parabola, so that the groove forms a through-channel recess extending around the guide body. Preferably, the conicity is rotationally symmetrical with respect to the longitudinal axis of the guide body. Preferably, the cross-section of the guide body first monotonically decreases in the region of the conicity along the longitudinal axis direction and then monotonically increases. Preferably, the conicity extends between a first end point and a second end point, which are spaced apart from each other in the direction of the central longitudinal axis of the guide body along the longitudinal axis of the guide body.

[0015] According to another preferred embodiment, the recess is a hole in the guide body of the shut-off element. As a result, the recess can be simply manufactured. Advantageously, the hole is a cylindrical opening through the guide body, which is preferably aligned perpendicular to the longitudinal axis of the prismatic guide body. The hole can fluidically connect the inlet opening and the outlet opening of the valve housing, so that the fluid can flow from the inlet opening through the hole to the outlet opening.

[0016] Advantageously, the shut-off element has a further recess. As a result, the fluid can flow from the inlet opening to the outlet opening via the recess and / or the further recess due to the linear movement of the shut-off element. In this case, the shut-off element is positioned by the linear movement in the valve housing so that the recess and / or the further recess fluidically connects the inlet opening to the outlet opening, so that the fluid can flow from the inlet opening to the outlet opening. By means of the further recess, sampling of the material can be carried out during continuous production and during discharge, for example by means of a start-up valve. Furthermore, pressure relief can be carried out by means of this further recess.

[0017] Furthermore, it is advantageous if the further recess is preferably a prismatic hole in the guide body of the shut-off element, particularly preferably a cylindrical further hole, as a result of which the further recess can be simply manufactured. If the recess is a cylindrical hole, the diameter of the recess can be smaller than, equal to or greater than the diameter of the cylindrical further hole of the further recess. If the diameters are the same, the further recess can be used as a backup for the hole. If the recess and the further recess differ in shape or the cylindrical hole and the cylindrical further hole differ in diameter, different flow rates can be achieved in the hole and in the further hole.

[0018] According to a preferred embodiment, the further recess is a prismatic hole in the guide body of the shut-off element, wherein preferably the longitudinal axis of the prismatic guide body and the longitudinal axis of the prismatic hole enclose an angle between 45° and 90°, particularly preferably between 60° and 85°, in particular between 70° and 80°. As a result, advantageously, the further discharge opening of the valve housing can be in fluid connection with the inlet opening at one position of the shut-off element, wherein the further discharge opening is configured for sampling. Preferably, the further discharge opening is arranged adjacent to the discharge opening on the same side of the valve housing as the discharge opening, such that the recess can be configured to extend perpendicular to the longitudinal axis of the prismatic guide body and the further recess can be configured to extend oblique to the longitudinal axis of the prismatic guide body. Preferably, in the arrangement of the shut-off element in the cavity, wherein the further recess is contiguous with the further discharge opening, the further recess is configured for further guiding fluid from the inlet opening to the further discharge opening. Thus, the inlet opening is in fluid connection to the further discharge opening via the further recess.

[0019] According to another preferred embodiment, the cavity comprises a first substantially prismatic section and a second substantially prismatic section, wherein the shut-off element is at least partially linearly movably accommodated in the second section. Preferably, the first section is in fluid connection to the second section, such that in the absence of the shut-off element arranged in the second section, fluid can flow from the first section into the second section and vice versa. Particularly preferably, the bottom face of the second prismatic section has the same shape as the bottom face of the prismatic guide body of the shut-off element. In this case, the bottom area of the guide body can be smaller than or equal to the bottom area of the second section, such that the shut-off element can be accommodated in the second section with a tolerance greater than or equal to 0. As a result, an optimal accommodation of the shut-off element in the cavity of the valve housing can be achieved.

[0020] According to a particularly preferred embodiment, the first and the second substantially prismatic sections intersect at an angle between 30° and 90°, preferably between 60° and 90°, particularly preferably between 80° and 90°, particularly exactly at an angle of 90°. Particularly preferably, the inlet opening and the discharge opening are arranged on the first section, such that fluid can flow in the first section and the shut-off element is accommodated in the second section. As a result, the axis along which the shut-off element is movable and the axis along which fluid is arranged to flow in the valve housing enclose an angle between 30° and 90°, preferably between 60° and 90°, particularly preferably between 80° and 90°, particularly exactly at an angle of 90°. Thus, the shut-off element can be moved oblique or transverse to the flow direction, such that an optimal shut-off of the fluid flowing in the valve housing can be achieved.

[0021] Advantageously, the inlet opening is arranged on the first base surface of the substantially prismatic first section, in particular congruent with the first base surface of the substantially prismatic first section. As a result, an optimal dead- zone-free flow of the fluid into the first section of the cavity of the valve housing can be achieved. Preferably, the fluid flows from the inlet opening via the first section to the second section of the cavity, from where it can further flow to the outlet opening via the recess or can be blocked by the shut-off element and prevented from further flowing, depending on the position of the shut-off element.

[0022] Furthermore, advantageously, the outlet opening is arranged on the second base surface of the substantially prismatic first section, which is opposite the first base surface, in particular congruent with the second base surface of the substantially prismatic first section, which is opposite the first base surface. Preferably, the inlet opening and the outlet opening are arranged on the longitudinal axis of the first section, so that an optimal fluid flow through the cavity of the valve housing can be formed. Particularly preferably, the axis along which the shut-off element is movable is aligned perpendicular to the longitudinal axis of the first section, so that the shut-off element is movable perpendicular to the fluid flow in the first section of the cavity. As a result, with the aid of the shut-off element, an optimal shut-off of the fluid in the valve housing can be achieved.

[0023] For a better fluid flow, the first section is substantially cylindrical, wherein in the region where the first section meets the second section, the diameter of the substantially cylindrical first section is 1% to 20%, preferably 5% to 10% smaller than in the case of the first base surface.

[0024] According to a preferred embodiment, the second section is a cylindrical borehole through the valve housing, wherein the borehole forms a first bore and a second bore on two opposite sides of the valve housing. As a result, since the second section of the cavity is made of a borehole, the valve housing can be manufactured simply and at low cost. The shut-off element can thus be arranged simply in the second section of the cavity of the valve housing and can be removed again from the second section of the cavity for maintenance purposes.

[0025] According to a particularly preferred embodiment, the guide body of the shut-off element is substantially cylindrical, wherein the longitudinal axis of the cylindrical second section coincides with the longitudinal axis of the substantially cylindrical guide body of the shut-off element. As a result, an optimal accommodation of the shut-off element in the second section of the cavity can be achieved.

[0026] According to a particularly preferred embodiment, the cut-off element in the cavity has a tolerance such that a gap is formed in the cavity between the guide body of the cut-off element and the valve housing through which fluid can flow. As a result, permanent storage of fluid in the valve can be reduced or even avoided. Through the gap, a defined fluid flow can flow around the guide body of the cut-off element, so that no dead space is formed in the cavity in which fluid can be deposited. Since there is no dead space, a long residence time of the fluid in the valve according to the application can be prevented. Advantageously, the recess of the cut-off element is configured in such a way that it does not form any dead space when fluid flows in and enables optimal transmission of the fluid. This is achieved by, for example, a narrowing as a recess. The tolerance is achieved, inter alia, (also) in the cut-off section adjacent to the narrowing.

[0027] According to a further particularly preferred embodiment, a seal is arranged between the guide body of the cut-off element and the cavity for sealing the cut-off element with respect to the valve housing. This has the advantage that the cut-off element can be completely sealed.

[0028] In order to better guide the cut-off element in the cavity, the substantially cylindrical guide body of the cut-off element is at least partially accommodated in the opening such that the cut-off element at least partially protrudes from the second bore.

[0029] Preferably, in the region of the second bore, in which the cut-off element protrudes from the valve housing, a sealing ring, preferably a leakage ring, is mounted in a groove formed by milling into the guide body of the cut-off element. These sealing rings are preferably composed of a flexible plastic ring and a cover ring that is resistant to the fluid. Particularly preferably, the sealing ring is arranged at the second bore on the valve housing in the second section of the cavity such that it seals the gap in the second section of the cavity between the valve housing and the guide body of the cut-off element. Depending on the viscosity of the fluid conveyed in the valve, there can be cases in which too much fluid flows out of the valve housing through the gap in the second section of the cavity between the valve housing and the guide body. Particularly preferably, in such cases, the sealing ring can be pushed inwards in the direction of the guide body in the second section of the cavity by means of a tightening screw, with which the sealing ring is fastened on the valve housing, so that the flow of fluid in the gap in the second section of the cavity between the guide body and the valve housing is reduced.

[0030] In order to move the cut-off element in the cavity, it is advantageous if the valve has a drive for linear movement of the cut-off element, wherein the drive engages in the end of the cut-off element that protrudes from the second bore. As a result, the cut-off element can be arranged partially in the cavity of the valve housing in a space-saving manner.

[0031] The application also relates to a valve system having a valve as described herein, wherein the start-up valve is arranged in a further cavity leading to an inlet opening of the valve.

[0032] In a preferred embodiment of the valve system, the start-up valve comprises:

[0033] start valve cavity, which is connected to the further cavity and in which a start valve shut-off element is accommodated;

[0034] a start valve inlet for the flow of fluid from the further cavity into the start valve cavity;

[0035] a start valve outlet for the flow of fluid from the start valve cavity;

[0036] wherein the start valve shut-off element has a start valve guide body for shutting off the start valve inlet, the start valve guide body being arranged movably in the start valve cavity.

[0037] Advantageously, the shut-off element of the valve oscillates regularly to flush the gap in the cavity between the valve housing and the guide body of the shut-off element. As a result, the flushing of the gap can be improved and any bursting of fluid in the gap can be further reduced. Preferably, the shut-off element oscillates in linear motion in the direction of the longitudinal axis of the second section of the cylindrical cavity. Particularly preferably, the amplitude of the oscillation motion is between 5 and 10 mm.

[0038] The application also relates to a method for conveying fluid, characterized in that the fluid is conveyed in a valve system as described herein. In this case, the fluid flows in particular along the further cavity and, if the valve is open, through the cavity to the outlet. If the valve is open, the fluid flows through the start valve cavity to the start valve outlet.

[0039] Advantageously, the valve system is operated in a start-up mode, in which the inlet is shut off by the shut-off element and the start valve guide body releases the start valve cavity.

[0040] Advantageously, the valve system is operated in a production mode, preferably after operation in the start-up mode, in which the recess enters the region of the cavity and the start valve inlet is closed by the start valve guide body. In this way, a pressure reduction and slower pressure rise in the valve can be achieved.

[0041] Preferably, the pressure release is carried out in the production mode, in which the start valve is partially or completely open for pressure release of the valve.

[0042] Advantageously, in the production mode or in the start-up mode, fluid sampling takes place via the further recess. BRIEF DESCRIPTION OF DRAWINGS

[0043] The application is explained further below with reference to the non-limiting exemplary embodiments shown in the drawings.

[0044] Figure 1 A valve according to the application is shown schematically, having a valve housing and a shut-off element in the open state and closed sampling;

[0045] Figure 2 schematically shown in a closed state according to the application; Figure 1 ;

[0046] Figure 3 schematically shown in a closed state and in an open sampling state according to the application; Figure 1 ;

[0047] Figure 4 schematically shown in a partially open state and in an open sampling state according to the application; Figure 1 ;

[0048] Figure 5 schematically shown is a starting valve according to the application with an additional valve, wherein the starting valve is in a closed state (shown in cross section); Figure 1 ;

[0049] Figure 6 schematically shown is a starting valve according to the application, wherein the starting valve is in an open state. Figure 5 DETAILED DESCRIPTION

[0050] A valve 1 according to the application is shown, which comprises a valve housing 2 and a shut-off element 3, wherein the valve housing 2 has a cavity 4 for accommodating the shut-off element 3, an inlet 5 for fluid flow into the cavity 4 and an outlet 6 for fluid flow out of the cavity 4. The shut-off element 3 comprises a substantially cylindrical guide body 7 and is arranged linearly movably in the cavity 4 of the valve housing 2 between the inlet 5 and the outlet 6. Furthermore, the guide body 7 has a recess 8 for fluid flow from the inlet 5 to the outlet 6 via the recess 8. The recess 8 is conical in the guide body 7, wherein the cone is arranged perpendicular to the longitudinal axis of the substantially cylindrical guide body 7. Furthermore, the shut-off element 3 has a further recess 9, which is a cylindrical hole in the guide body 7 of the shut-off element 3. The longitudinal axis of the prismatic guide body 7 and the longitudinal axis of the cylindrical further recess 9 enclose an angle of 75°. Figures 1 to 4 The cavity 4 comprises a substantially cylindrical first section 10 and a cylindrical second section 11, wherein the shut-off element 3 is linearly movably partially accommodated in the second section 11. In this case, the longitudinal axis of the cylindrical second section 11 coincides with the longitudinal axis of the substantially cylindrical guide body 7 of the shut-off element 3. The shut-off element has a tolerance in the second section 11 of the cavity 4, so that a gap through which fluid can flow is formed in the cavity 4 between the guide body 7 of the shut-off element 3 and the valve housing 2. As a result, any permanent deposition of fluid in the valve 1 can be reduced or even avoided.

[0051]

[0052] ​The first section 10 and the second section 11 intersect at an angle of 90°, so that the first section 10 is arranged perpendicular to the second section 11. As a result, the first section 10 and the second section 11 form two mutually perpendicularly arranged channels, which form a cross-shaped cavity 4. The inlet opening 5 is arranged on a first bottom face of the substantially cylindrical first section 10, the inlet opening 5 being congruent with the first bottom face of the first section 10. The outlet opening 6 is arranged on a second bottom face of the substantially cylindrical first section 10, which is opposite the first bottom face, the outlet opening 6 being congruent with the second bottom face of the first section 10. Thus, the inlet opening 5 and the outlet opening 6 are arranged on a longitudinal axis of the substantially cylindrical first section 10. The first section 10 intersects the second section 11 of the cavity 4 in a region arranged between the inlet opening 5 and the outlet opening 6. Since the shut-off element 3 is accommodated in the second section 11, the shut-off element 3 is arranged between the inlet opening 5 and the outlet opening 6. In the shown embodiment, the second section 11 is a cylindrical bore through the valve housing 2, wherein the bore forms a first bore 12 and a second bore 13 on opposite sides of the valve housing 2. The guide body 7 of the shut-off element 3 is accommodated in the bore in such a way that the shut-off element 3 partially protrudes from the second bore 13. The valve 1 has a drive 14 for linearly moving the shut-off element 3 in the direction of the longitudinal axis of the substantially cylindrical guide body 7, wherein the drive 14 engages at an end of the shut-off element 3 which protrudes from the second bore 13.

[0053] In the shown embodiment, the diameter of the first section 10 in the intersection region 15 of the first section 10 and the second section 11 is 20% smaller than in the case of the first bottom face at the inlet opening 5. The recess 8 is configured as an annular cutout perpendicular to the longitudinal axis of the substantially cylindrical guide body 7. The width of the annular cutout is equal to the diameter of the first section 10 in the intersection region 15. Furthermore, the annular cutout has a cross-section which is delimited by a parabola and an axis parallel to the directrix of the parabola. Due to the recess 8 in the guide body 7, the shut-off element 3 is bone-shaped, wherein the constant diameter of the substantially cylindrical guide body 7 is reduced by up to 40% due to the recess 8.

[0054] The valve housing 2 has a further outlet opening 16, in which a sampling valve 17, for example a ball valve, is arranged for opening and closing the further outlet opening 16. The further outlet opening 16 is fluidically connected to the second section 11 of the cavity 4, so that fluid can flow from the second section 11 of the cavity 4 via the further outlet opening 16 and the sampling valve 17, which is open from the valve 1. In this case, the further outlet opening 16 is arranged on the same side of the second section 11 of the cavity 4 as the outlet opening 6, wherein the further outlet opening 16 is arranged on an imaginary extension of the second bottom face of the first section 10 of the cavity 4.

[0055] In the case of a valve 1 according to the application, the shut-off element 3 is accommodated in the second section 11 of the cavity 4, wherein the shut-off element 3 is arranged between the inlet opening 5 and the outlet opening 6. The shut-off element 3 is arranged in the second section 11 of the cavity 4 in such a way that the shut-off element 3 is arranged between the inlet opening 5 and the outlet opening 6. The shut-off element 3 is arranged in the second section 11 of the cavity 4 in such a way that the shut-off element 3 is arranged between the inlet opening 5 and the outlet opening 6. Figures 1 to 4In the embodiment of the valve 1 according to the application shown, fluid flows via the cylindrical tube section 18 to the circular inlet opening 5 of the valve housing 2 adjacent to the tube section 18. Via the inlet opening 5, the fluid further flows into the first section 10 of the cavity 4 of the valve housing 2 to the intersection region 15 of the second section 11 of the cavity 4 with the first section 10. The shut-off element 3 is accommodated in the second section 11, wherein in the Figure 1 second section 11 the shut-off element 3 is positioned in the manner of the recess 8 in the second section 11 at the intersection region 15 of the first section 10 and the second section 11. Since the cross section of the shut-off element 3 in the intersection region 15 is smaller than the cross section of the cylindrical second section 11 due to the recess 8 in the substantially cylindrical guide body 7, the recess 8 forms an opening in the intersection region 15 between the shut-off element 3 and the valve housing 2, so that the fluid in the first section 10 of the cavity 4 flows through the intersection region 15 to the discharge opening 6. Since a gap is formed in the second section 11 of the cavity 4 between the guide body 7 of the shut-off element 3 and the valve housing 2, a defined amount of fluid can flow into the gap to flush the gap.

[0056] With the aid of the drive 14, the shut-off element 3 can be moved, so that as shown Figure 2 the recess 8 is no longer arranged in the intersection region 15 of the first section 10 and the second section 11 of the cavity 4. In this case, neither the recess 8 nor the further recess 9 is arranged in the intersection region 15 and fluidically connected to the first section 10 of the cavity 4. By Figure 2 the positioning of the shut-off element 3 shown, the substantially cylindrical guide body 7 of the shut-off element 3 fills the entire cross section of the second section 11 of the cavity 4, apart from the gap, so that the intersection region 15 is completely filled by the guide body 7 of the shut-off element 3, apart from the small gap, so that the guide body 7 shuts off the intersection region 15. As a result, the region of the first section 10 of the cavity 4 adjoining the inlet opening 5 is shut off by the shut-off element 3 from the region of the first section 10 adjoining the discharge opening 6. As a result, no fluid can flow from the inlet opening 5 into the first section 10 of the cavity 4 to the discharge opening 6 or the further discharge opening 16, apart from a small amount of fluid via the gap.

[0057] By moving the shut-off element 3, it is possible as shown Figure 3The shown arrangement is in the second section 11 of the cavity 4 such that the further recess 9 is partially arranged in the intersection region 15 such that the further recess 9 fluidically connects the area of the first section 11 which adjoins the inlet opening 5 with the further outlet opening 16. Due to the angle of the longitudinal axis of the substantially cylindrical guide body 7 and the longitudinal axis of the cylindrical further recess 9 encloses for example 75°, the further recess 9 is fluidically connected to the inlet opening 5 but not to the outlet opening 6 but to the further outlet opening 16 which is offset with respect to the outlet opening 6. Via the hole which is arranged inclined with respect to the longitudinal axis in the guide body 7 which forms the further recess 9, fluid can flow from the inlet opening 5 via the first section of the cavity 4 to the further outlet opening 16 where sampling of the fluid can take place. Due to the fact that the further recess 9 is not fluidically connected to the area of the first section 10 which adjoins the outlet opening 6 and due to the fact that the recess 8 is not arranged in the intersection region 15 of the first section 10 and the second section 11 of the cavity 4, the outlet opening 6 is not fluidically connected with the inlet opening such that no fluid flows through the outlet opening 6 from the valve 1.

[0058] Figure 4 A valve 1 according to Figure 1 The shown embodiment of the valve 1 wherein the shut-off element 3 is arranged in the second section 11 of the cavity 4 such that the recess 8 is partially positioned in the intersection region 15 of the first section 10 and the second section 11 of the cavity 4. In this case, the part of the recess 8 which is not located in the intersection region 15 adjoins the further outlet opening 16 such that the opening formed by the recess 8 in the intersection region 15 fluidically connects the inlet opening 5 with both the outlet opening 6 and the further outlet opening 16. Thus, fluid which flows into the first section 10 of the cavity 4 via the inlet opening 5 can further flow through the intersection region 15 to the outlet opening 6 and the further outlet opening 16 via the opening formed by means of the recess 8. In this case, the opening of the outlet opening 6 is smaller than in the Figure 1 The positioning of the shown shut-off element 3 is such that the recess 8 is arranged in the intersection region 15 of the first section 10 and the second section 11 of the cavity 4. In this case, the part of the recess 8 which is not located in the intersection region 15 adjoins the further outlet opening 16 such that the opening formed by the recess 8 in the intersection region 15 fluidically connects the inlet opening 5 with both the outlet opening 6 and the further outlet opening 16. Thus, fluid which flows into the first section 10 of the cavity 4 via the inlet opening 5 can further flow through the intersection region 15 to the outlet opening 6 and the further outlet opening 16 via the opening formed by means of the recess 8. In this case, the opening of the outlet opening 6 is smaller than in the Figure 1 The positioning of the shown shut-off element 3 is such that the recess 8 is arranged in the intersection region 15 of the first section 10 and the second section 11 of the cavity 4. In this case, the part of the recess 8 which is not located in the intersection region 15 adjoins the further outlet opening 16 such that the opening formed by the recess 8 in the intersection region 15 fluidically connects the inlet opening 5 with both the outlet opening 6 and the further outlet opening 16. Thus, fluid which flows into the first section 10 of the cavity 4 via the inlet opening 5 can further flow through the intersection region 15 to the outlet opening 6 and the further outlet opening 16 via the opening formed by means of the recess 8. In this case, the opening of the outlet opening 6 is smaller than in the

[0059] The valve 1 according to the present application can be used, for example, in a manufacturing process of a cellulose / amine oxide solution. Due to the configuration of the shut-off element 3, it is prevented that spinning material can accumulate and decompose in dead zones of the apparatus. Since the shut-off element 3 can be arranged in a periodic rotational or periodic translational movement and be flushed, the shut-off element 3 cannot get stuck in the valve housing 2 even in the case that the spinning material is stored in the valve 1 for a considerable time. Thus, the present application also provides a method for transporting a cellulose solution in an aqueous solution of a tertiary amine oxide by means of the valve 1, wherein the flow rate of the cellulose solution in the valve housing 2 can be set and varied periodically in order to ensure a safe transfer, distribution and safe transport of the cellulose / amine oxide solution.

[0060] Figures 1 to 4 The illustrated embodiment of the valve 1 according to the present application can be used as part of a valve system 19. To this end, as illustrated in Figure 5 and Figure 6 the valve 1 according to the present application is combined with a start valve 20. The start valve 20 comprises a valve housing 21 and a shut-off element 22, wherein the valve housing 21 of the start valve 20 comprises a cavity 23 for accommodating the shut-off element 22, an inlet opening 25 for a fluid flow into the cavity 23 and an outlet opening 24 for a fluid flow out of the cavity 23 of the start valve 20. The shut-off element 22 of the start valve 20 has a guide body 26 and a shut-off protrusion 27 for shutting off the inlet opening 25 and is movably arranged in the cavity 23 of the valve housing 21 of the start valve 20. The shut-off protrusion 27 has a curved abutment face 28 for abutting against the inlet opening 25. The curved abutment face 28 is circular arc-shaped in order to be able to abut against the inlet opening 25 of the valve housing 21 of the start valve 20, which is arranged on the side of a further cavity 29 which is cylindrical. In this case, the inlet opening 25 connects the cavity 23 and the further cavity 29 which is arranged vertically on the cavity 23. The guide body 26 of the shut-off element 22 of the start valve 20 is substantially cylindrical, wherein the shut-off protrusion 27 is arranged on a bottom face 30 of the substantially cylindrical guide body 26. The cavity 23 comprises a first section 31 which is cylindrical and a second section 32 which is arranged between the first section 31 and the further cavity 29. In this case, the further cavity 29 which is cylindrical is arranged in the longitudinal direction of the first section 31 which is cylindrical of the cavity 23, wherein the longitudinal axis of the further cavity 29 which is cylindrical is perpendicular to the longitudinal axis of the first section 31 which is cylindrical. The shut-off protrusion 27 has the same shape as the second section 32 of the cavity 29 of the valve housing 21 of the start valve 20. The shut-off element 22 of the start valve 20 is arranged in the cavity 23 in such a way that the longitudinal axis of the first section 31 which is cylindrical of the cavity 23 coincides with the longitudinal axis of the guide body 26 which is substantially cylindrical of the shut-off element 22.

[0061] The outlet opening 24 is arranged on the side surface of the cylindrical first section 31 of the cavity 23. The first section 31 of the cavity 23 is a cylindrical bore through the valve housing 21 of the starting valve 20, which forms a hole 33 on the side opposite the second section 32 of the cavity 23. The guide body 26 is accommodated in the bore such that the shut-off element 22 partially protrudes from the hole 33. The starting valve 20 has a drive 34 for linear movement of the shut-off element 22 in the direction of the longitudinal axis of the substantially cylindrical guide body 26, wherein the drive 34 engages on the end of the shut-off element 22 that protrudes from the hole 33.

[0062] In Figure 5 which the starting valve 20 is in the closed state, wherein the curved abutment surface 28 of the shut-off protrusion 27 abuts on the inlet opening 25. Furthermore, the guide body 26 of the shut-off element 22 abuts on and shuts off the outlet opening 24, so that no fluid can flow from the inlet opening 25 into the cavity 23 of the starting valve 20 and further to the outlet opening 24. In this position, the shut-off protrusion 27 is arranged within the second section 32 of the cavity 23, and the guide body 26 is arranged within the first section 31 of the cavity 23. In order to avoid a dead space for fluid in the starting valve 20, a gap can be formed in the cavity 23 between the valve housing 21 and the guide body 26, so that fluid can flow through the inlet opening 25 into the cavity 23 via the gap and further to the outlet opening 24. Thus, a long residence time of the fluid in the starting valve 20 can be avoided. During linear movement of the shut-off element 22 of the starting valve 20 in the longitudinal direction of the cylindrical first section 31 of the cavity 23 in the direction of the hole 33, the guide body 26 of the shut-off element 22 moves past the outlet opening 24. During the passage of the guide body 26, the outlet opening 24 is continuously opened, so that fluid can flow from the further cavity 29 through the inlet opening 25 into the cavity 23 and further to the outlet opening 24. In this case, the fluid in the cavity 23 is guided through the bottom surface 30 of the substantially cylindrical guide body 26 and the curved abutment surface 28 of the shut-off protrusion 27, so that the flow of the fluid in the cavity 23 is improved. During further linear movement of the shut-off element 22 in the direction of the hole 33, the outlet opening 24 is further opened until the guide body 26 no longer covers the outlet opening 24, as Figure 6 shown in Fig. 3, the outlet opening 24 is completely opened. In this case, the bottom surface 30 of the substantially cylindrical guide body 26 contacts the outlet opening 24 on the side facing away from the inlet opening 25. By means of the bottom surface 30 and the curved abutment surface 28 of the shut-off protrusion 27, the fluid in the cavity 23 is guided in the direction of the outlet opening 24, wherein the flow of the fluid is improved compared to a shut-off element without a shut-off protrusion 27.

[0063] The further cavity 29 of the starting valve 20 corresponds to the starting valve 20 according to Figures 1 to 4The flowing fluid reaches the outlet opening 6 of the valve housing 2 according to the application via the first section 11 of the cavity 4 and the recess 8 of the shut-off element 3 through the inlet opening 5 of the valve housing 2 of the valve 1 according to the application and thus flows in the cylindrical pipe section 18, from which the fluid reaches the outlet opening 24 via the inlet opening 25 of the valve housing 21 of the starting valve 20. Figure 1 The valve 1 shown in Figure 5 and Figure 6 corresponds here to the cross section I-I shown in

Claims

1. A valve (1) comprising a valve housing (2) and a shut-off element (3), wherein The valve housing (2) comprises a cavity (4) for accommodating a shut-off element (3), an inlet opening (5) for fluid flow into the cavity (4) and an outlet opening (6) for fluid flow out of the cavity (4), wherein the shut-off element (3) comprises a guide body (7) and is at least partially linearly movably arranged in the cavity (4) of the valve housing (2) between the inlet opening (5) and the outlet opening (6), wherein the shut-off element (3) has at least one recess (8) for fluid flow from the inlet opening (5) to the outlet opening (6) via the recess (8), wherein the recess (8) is a circumferential groove on the guide body (7) perpendicular to a longitudinal axis of the guide body (7), characterized in that the shut-off element (3) has a further recess (9) for fluid flow from the inlet opening (5) to the outlet opening (6) via the further recess (9), the further recess (9) being a prismatic hole in the guide body (7) of the shut-off element (3), wherein the valve housing has a further outlet opening (16) and, in one position of the shut-off element, the further outlet opening (16) is fluidically connectable to the inlet opening (5) via the further recess (9).

2. Valve (1) according to claim 1, characterized in that The guide body (7) of the shut-off element (3) is prismatic.

3. Valve (1) according to claim 1, characterized in that The guide body (7) of the shut-off element (3) is substantially cylindrical.

4. Valve (1) according to claim 1 or 2, characterized in that The recess (8) is conical in the guide body (7).

5. Valve (1) according to claim 4, characterized in that The conical arrangement is perpendicular to a longitudinal axis of the guide body (7).

6. Valve (1) according to claim 1 or 2, characterized in that The recess (8) is a hole in the guide body (7) of the shut-off element (3).

7. Valve (1) according to claim 1 or 2, characterized in that The longitudinal axis of the guide body (7) and the longitudinal axis of the prismatic further recess (9) enclose an angle between 45° and 90°.

8. Valve (1) according to claim 7, characterized in that The longitudinal axis of the guide body (7) and the longitudinal axis of the prismatic further recess (9) enclose an angle between 60° and 85°.

9. Valve (1) according to claim 1 or 2, characterized in that A sampling valve (17) for opening and closing the further outlet opening (16) is arranged at the further outlet opening (16).

10. Valve (1) according to claim 1 or 2, characterized in that The cavity (4) comprises a substantially prismatic first section (10) and a substantially prismatic second section (11), wherein the shut-off element (3) is at least partially linearly movably accommodated in the substantially prismatic second section (11).

11. Valve (1) according to claim 10, characterized in that The substantially prismatic first section (10) and the substantially prismatic second section (11) intersect at an angle between 30° and 90°.

12. Valve (1) according to claim 10, characterized in that The inlet opening (5) is arranged on a first bottom face of the substantially prismatic first section (10).

13. Valve (1) according to claim 12, characterized in that The inlet opening (5) coincides with the first bottom face of the substantially prismatic first section (10).

14. Valve (1) according to claim 12, characterized in that The outlet opening (6) is arranged on a second bottom face of the substantially prismatic first section (10) opposite the first bottom face.

15. Valve (1) according to claim 12, characterized in that The outlet opening (6) coincides with the second bottom face of the substantially prismatic first section (10) opposite the first bottom face.

16. Valve (1) according to claim 10, characterized in that The substantially prismatic second section (11) is a cylindrical bore through the valve housing (2), wherein the bore forms a first hole and a second hole on two opposite sides of the valve housing (2).

17. Valve (1) according to claim 16, characterized in that The guide body (7) of the shut-off element (3) is substantially cylindrical, wherein the longitudinal axis of the cylindrical second section (11) coincides with the longitudinal axis of the substantially cylindrical guide body (7) of the shut-off element (3).

18. Valve (1) according to claim 16, characterized in that A drive (14) for linear movement of the shut-off element (3), wherein the drive (14) engages at an end of the shut-off element (3) protruding from the second bore (13).

19. A valve system (19) characterised by Valve (1) according to any one of claims 1 to 18, wherein a start valve (20) is arranged in a further cavity (29) leading to the inlet opening (5) of the valve (1).

20. The valve system (19) according to claim 19, characterized in that The start valve (20) comprises: a start valve cavity (23) connected to the further cavity (29) and in which a start valve shut-off element (22) is accommodated; a start valve inlet opening (25) for fluid flow from the further cavity (29) into the start valve cavity (23); a start valve outlet opening (24) for fluid flow from the start valve cavity (23); wherein the start valve shut-off element (22) has a start valve guide body (26) for shutting off the start valve inlet opening (25), which start valve guide body (26) is movably arranged in the start valve cavity (23).

21. A method for delivering a fluid, characterized by, Fluid flow is regulated and / or controlled in the valve (1) according to any one of claims 1 to 18.

22. The method of claim 21, wherein, The shut-off element (3) of the valve (1) is regularly oscillated for flushing of the gap in the cavity (4) between the valve housing (2) and the guide body (7) of the shut-off element (3).

23. A method for delivering a fluid, characterized by, Fluid is conveyed in the valve system (19) according to claim 19 or 20.

24. The method of claim 23, wherein, The valve system (19) is operated in a start-up mode, wherein the inlet opening (5) is shut off by the shut-off element (3) and the start valve guide body (26) releases the start valve cavity (23).

25. The method of claim 23 or 24, wherein, The valve system (19) is operated in a production mode, wherein the recess (6) enters into the region of the cavity (4) and the start valve inlet opening (25) is closed by the start valve guide body (26).

26. The method of claim 23 or 24, wherein, The valve system (19) is operated in a production mode after operation in a start-up mode. The valve system (19) is operated in a production mode after operation in a start-up mode.

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