Measuring device with a plug valve

Abstract

In order to enable accurate metering even in extremely small amounts, at least the outlet valve (16) of the metering device (1), which is usually a piston-type metering device (1), is designed as a plug valve (55) having a valve body (52) displaceable axially or rotatably. The inlet valve (15) can likewise be a plug valve (55) or a diaphragm valve. A design with a displaceable valve body (52) is preferred.

Description

Detailed Description of the Invention

[0001] I. Field of the Application The present invention relates to metering means for paste-like materials, specifically piston-type metering means, which are provided with valves, specifically outlet valves.

[0002] II. Background Art In the case of metering means that operate discontinuously, the inlet line and / or the outlet line generally need to be closed by valves.

[0003] In the case of piston-type metering means, each material, which is usually paste-like, is discharged from the storage container by the retraction of the metering piston and drawn into a metering cylinder that accommodates the desired metering volume when the metering piston retracts, via the connected inlet line, or flows into the metering cylinder by gravity to fill the metering cylinder. Thereafter, the metering volume accommodated in the metering cylinder is metered and discharged by pushing the metering piston forward and supplied to a desired outlet opening, usually a nozzle or an upstream mixing pipe, via the outlet line.

[0004] This is often done simultaneously in two co-located metering cylinders, for example, for the binder and the hardener of a two-component adhesive.

[0005] For this purpose, in order to keep the outlet line closed when filling the metering cylinder and keep the inlet line closed when metering and discharging to the outlet opening, usually an inlet valve is installed in each inlet line and an outlet valve is installed in each outlet line. These valves are generally I / O valves.

[0006] The inlet valve and the outlet valve are often designed as diaphragm valves. The component to be metered is located only on one side of the diaphragm. To cut off the flow of the material passing through the valve, the diaphragm can be pressed against the sealing surface from the other side of the diaphragm by a closing cylinder. Since the material only flows slightly along the surface of the diaphragm, even in the case of abrasive materials, the wear of the diaphragm is small.

[0007] However, when the metering volume is extremely small compared to the volume of the working space of the open diaphragm valve, the diaphragm may stretch somewhat or change in rigidity over time, and thus the metering capacity can vary, resulting in inaccurate metering.

[0008] III. Presentation of the Invention a) Technical Problem Therefore, the problem addressed by the present invention is to provide metering means, specifically a piston-type metering means, comprising a valve, specifically an outlet valve, that avoids the above-mentioned drawbacks.

[0009] b) Solution to the Problem The above problem is solved by the features described in claim 1. Advantageous embodiments are apparent from the dependent claims.

[0010] In the case of the present metering device comprising one or more metering means, each comprising an inlet valve and an outlet valve, in particular piston-type metering means, at least one of these two valves is designed as a plug valve according to the present invention.

[0011] For the purposes of the present invention, a plug valve is understood to be a valve in which a valve body, in particular frustoconical or cylindrical, is arranged closely within the body and pivotable about its axial direction, or a plug valve is understood to be a valve in which a valve body having any cross-section is arranged closely within the body and is displaceable axially back and forth in a direction transverse to the direction of travel of the through-flow passage through which the material passes. In either case, the outlet of the through-flow passage is made such that it at least partially overlaps (open position) or completely overlaps (closed position) the adjacent protruding flow passage.

[0012] Both the body and the valve body have through-openings that usually extend in the radial direction, i.e., transversely. (Rotatable valve body) Using such displacement or rotation of the valve body, known as a plug, the outlet of the radial through-opening of the valve body and the outlet of the radial through-opening of the body are brought into a position where they partially or completely overlap each other, so that the valve is partially or completely opened and the material can flow radially through the body from one side to the other.

[0013] At least one annular surface around each outlet of the body functions as a seat surface, i.e., as a contact surface for the sealing surface of the valve body. At least one annular surface around each outlet of the valve body, or the entire inner circumferential surface of the body in the axial region where the outlet of the body is located, or the entire outer circumferential surface of the valve body in the axial region where the outlet of the valve body is located, functions as a sealing surface.

[0014] If the valve body is rotated about the axis or displaced axially with respect to the body to such an extent that the opposing outlets of the radial through-openings of the valve body and the body do not overlap at all, the outer periphery of the valve body is in close contact with the inner periphery of the body, so that the valve is closed.

[0015] In the case of a cylindrical valve body and a corresponding cylindrical seating surface on the body, this is achieved by having corresponding precise manufacturing tolerances for all diameters. In the case of a frustum-shaped valve body and a similarly shaped seating surface on the body, this can be achieved by axially preloading the valve body in the direction of the tapered cross-section of the valve seat in the body.

[0016] The advantage of a plug valve is essentially that, on the outlet side of the body, by displacing or rotating the valve body from the open position to the closed position, no additional material is pushed into the outlet line adjacent to the valve body on the outlet side, and thereby, in contrast to other valve types such as diaphragm valves, the metering capacity can be metered and discharged extremely accurately even if it is an extremely small amount, especially compared to the volume of the radially through-opening of the valve body.

[0017] The disadvantage of a plug valve is that the medium can reach the valve seating surface between the valve body and the body, and due to their relative movement, relatively rapid wear occurs on both.

[0018] To reduce wear, a material combination of the seating surface of the body and the sealing surface of the valve body is selected such that the materials have significantly different hardnesses. In particular, the valve body is composed of a softer material at least on its outer periphery, preferably a plastic material such as HPU, PTFG, or polyethylene, while the seating surface of the body is composed of a harder material, either a harder plastic material or preferably metal, especially hardened metal.

[0019] In this regard, it should be clearly stated that the seating surface and the sealing surface do not necessarily have to be surfaces that have no lateral extension with respect to the surface in the geometric sense. Rather, it is sufficient if the thickness of the surface is different from zero.

[0020] In particular, the outer peripheral surface of the valve body is made of a softer material such that, at least on its sealing surface, the Shore hardness is at most 96, in particular at most 70, in particular at most 55, and / or the tensile strength is at most 60 MPa, in particular at most 50 MPa, and / or the ultimate elongation is at least 350%, in particular at least 400%.

[0021] As a result of this measure, on the one hand, the agglomerations of abrasive hard particles to be conveyed can be pushed into the softer material of this material combination, so that the softer material has not yet suffered wear, and on the other hand, wear occurs mainly in the softer material of this material combination, preferably in the valve body which can be replaced more easily than the body of the plug valve fixed to the peripheral structure.

[0022] One possibility is that, especially in a frustoconical design, the outermost layer of the peripheral surface of the valve body is formed as an exchangeable sleeve of a soft material and can be easily replaced on the valve body after removing the valve body from the body.

[0023] Another possibility is that the valve body is preferably composed of a softer material over its entire cross-section, i.e., the valve body is made of the same soft material up to the middle and is penetrated only by transverse holes.

[0024] However, in the case of a frustoconical design, when the maximum cross-section of the transverse holes of the valve body is relatively large compared to the taper angle of the truncated cone, i.e., for example, when the taper angle with respect to the axial direction is at least 10°, preferably at least 20°, preferably at least 30°, by readjusting the valve body in the axial direction, their outlets overlap sufficiently at the valve opening position and wear can be compensated for over a long period.

[0025] This advantage does not exist in the case of a cylindrical valve body. Here, regarding the diameter difference related to the wear between the sealing surface of the valve body and the seat surface of the main body, by selecting a softer material among the material combinations, particularly a very soft and highly elastic material for the sealing surface on the side of the valve body, only by axially compressing and expanding the diameter of the peripheral surface of the valve body in the axial region of its outlet, can the above diameter difference be reduced. This is particularly possible when the valve body is integrally formed entirely of the above soft elastic material in the region of the through-opening.

[0026] Also, the valve body can be easily removed and installed preferably in less than one minute and without using special tools, most preferably without using any tools at all, ensuring quick and easy replacement of the valve body.

[0027] In the case of a rotatable, i.e., pivotable, valve body, the valve body is operably connected to a swivel drive that causes pivoting from the open position to the closed position, particularly at one of the end regions of the end region of the valve body.

[0028] The swivel drive is preferably a pneumatic cylinder. The pneumatic cylinder operates eccentrically and tangentially on the valve body or on a flange protruding radially from the valve body, and its piston can retract and extend between two end positions. Alternatively, the swivel drive can be any other swivel drive, such as a drive by a gear (cog) or a drive using a threaded spindle, particularly one with a very large pitch.

[0029] Generally, for good installation, particularly for rotatable installation, the valve body is part of a plug shaft attached to the main body on both sides of the valve seat.

[0030] In the case of a frustum-shaped valve body, the plug shaft is preferably mounted on the side of the smaller cross-section of the valve body by a rolling bearing, both in the radial and axial directions, especially in a combination of radial / axial bearings, and on the side of the larger cross-section of the valve body, it is mounted only by a radial bearing that enables axial conveyance. Therefore, in many cases, it is not a rolling bearing but only a sliding bearing that mounts it. In particular, in any case, the seal present there can function as a sliding bearing.

[0031] In the case of a design that maintains the same cross-section of the valve body in the region of the sealing surface, especially a cylindrical design, the bearings, especially the rolling bearings, are provided in both the radial and axial directions in at least one end region, while at the other end, they are provided at most in the radial direction. As a result, in order to axially press the elastic valve body or at least its peripheral surface, it is possible to move axially relative between the two end regions of the plug shaft.

[0032] A valve body made of a softer material is preferably detachably connected to two adjacent end portions of the plug shaft at its end face. Thus, when the plug shaft is removed from the main body, the connection between the two adjacent end portions of the plug shaft is released, and a new valve body is inserted between them, so that the valve body can be easily replaced.

[0033] For this purpose, the connection is made, for example, by screwing axially through a remote through-opening through the valve body, or by inserting the valve body radially between two end portions of the plug shaft, preferably along a fit, especially along an undercut alternating guide. Thereby, the valve body is securely held both axially and rotationally on the remaining part of the plug shaft.

[0034] Also, in this design where the valve body has a uniform cross-section at least in the region of the sealing surface of the valve body, in the case of a rotatable plug shaft, an axial stop is required on the plug shaft so that an axial force can be applied to the plug shaft and thus to the valve body from the opposite side of the seal body.

[0035] In the case of a plug shaft that can be displaced axially for opening and closing, this type of stopper is not reasonable. Rather, preferably, the two end regions of the plug shaft are preloaded against each other to effect permanent compression and thus lateral extension of the valve body.

[0036] This can be done using one or more tension screws extending axially through a through-opening passing through the valve body, and the through-opening does not necessarily have to be centrally located. Also, in the case of a single central tension screw, this can be configured as a threaded bolt at one end portion and a threaded hole at the opposite end portion when the passage needs to extend laterally beyond the donor tension screw.

[0037] Also, in this case, preferably, a tension element such as a spring is provided, and the tension element, for example in the form of a disc spring, maintains the axial preloading against the valve body over a wide range of wear.

[0038] Regardless of the term "plug shaft" in a design where the valve body is axially displaced between an open position and a closed position, it should be clear that the cross-section of the above plug shaft does not have to be rotationally symmetric, but rather can be, for example, polygonal, especially rectangular.

[0039] In the case of a pivotable plug shaft, a pivoting position monitoring portion of the valve body is provided to always grasp the pivoting position of the plug shaft and thus of the valve body.

[0040] Preferably, for this purpose, axially beyond the valve body, the plug shaft is provided with a radially protruding projection, especially a flange, and the pivoting position of the plug shaft is monitored, preferably non-contact, by an angle sensor with respect to at least two end positions and notified to the control unit of the metering device.

[0041] This may preferably be a projection or flange protruding in the same radial direction as the pivoting drive operates, eccentric in the tangential direction.

[0042] When the material is, in particular when the material is an abrasive material, in order to prevent it from entering between the seating surface and the sealing surface, especially towards the mounting parts on both sides out of the valve, in the valve seat, that is, in the body, a cleaning pocket is arranged around the plug shaft.

[0043] For this purpose, the cleaning pocket can be arranged around the plug shaft at an axial distance from the actual plug valve, that is, from the seating surface.

[0044] However, preferably, the cleaning pocket is arranged in the axial regions of the seating surface and the sealing surface, but is circumferentially offset from the outlet, especially from the seating surface surrounding the outlet.

[0045] The cleaning pocket is in fluid connection with a cleaning circuit, and the cleaning liquid flows through the cleaning pocket to carry out the material that has entered the cleaning pocket.

Brief Description of the Drawings

[0046] c) Embodiment Embodiments according to the present invention will be described in more detail below by way of example.

Figure 1a

Figure 1b

Figure 2a

Figure 2b

Figure 2c

Figure 3a

Figure 3b

Figure 4

DETAILED DESCRIPTION OF THE INVENTION

[0047] FIGS. 1a and 1b show a piston-type metering means 1 in different moving phases in which a valve device 50 according to the present invention having a plug valve 55 as both an outlet valve 16 and an inlet valve 15 is used.

[0048] In many cases, the metering device has two or more piston-type metering means 1 arranged side by side for metering a plurality of material components to be mixed with each other, such as, for example, a binder and a curing agent of an adhesive, and can be driven together by a common drive unit, for example, by synchronous movement of their piston rods.

[0049] As shown in FIGS. 1a and 1b, an inlet line 5 and an outlet line 6 communicate with a metering cylinder 3, specifically into the interior of its lower end face. The material M to be metered is supplied from a storage container 17 into the metering cylinder 3 formed in the main body 2 via the inlet line 5. After the metering cylinder 3 is filled, the determined metering volume of the material M accommodated in the metering cylinder 3 is discharged from the metering piston 4 in the direction of the outlet opening 7 via the outlet line 6.

[0050] FIG. 1a shows the filling of the metering volume into the metering cylinder 3.

[0051] In this case, the outlet valve 16 is closed and the inlet valve 15 is open. Thus, when the metering piston 4 moved by the motor 18 moves backward in a direction to expand the volume of the working space in the metering cylinder 3, the material to be metered is sucked or allowed to flow out from the storage container and flow into the metering cylinder 3 until the metering piston reaches a fully retracted position corresponding to the desired metering volume in the metering cylinder 3.

[0052] When the metering piston 4 is in this position, the inlet valve 15 is closed and, according to Figure 1b, the metering piston 4 is moved forward using the motor 18. Thus, the material M accommodated in the metering cylinder 3 can be discharged from the metering cylinder 3 only through the outlet line 6 which should be naturally opened for this purpose.

[0053] When the metering piston 4 is moved forward to near the bottom of the metering cylinder 3, the outlet line 6 is continuously filled until it reaches the outlet opening 7, so that the metering capacity corresponding to the stroke amount of the metering piston 4 is pushed out through the outlet line 6.

[0054] Figures 2a and 2b show a first design of a plug valve 55 with a frustum-shaped conical valve body 52 rotatable about the axial direction. The plug is shown in the open position in the axial cross-section in Figure 2a and in the plan view of the end face in Figure 2b, and in the closed position in the cross-section transverse to the axial direction 52’ in Figure 2c.

[0055] As can be more clearly seen from the detailed view of Figure 2a, the through-flow path 52A2 extends transversely to the axial direction and is usually designed as a lateral hole, extending through the valve body 52 in the radial direction. In the open position, the through-flow path 52A2 is aligned with the supply flow paths 51A2 adjacent to the through-flow path 52A2 on both sides within the surrounding seat body 51, and the outlets 52A1 of the valve body 52 overlap as completely as possible with the opposing outlets 51A1 of the seat body 51 on each side.

[0056] The valve body 52 can become part of the plug shaft 53 by being axially adjacent and clamped between two end regions 53a, 53b of the plug shaft 53. When the valve body 52 is pivoted using the pivoting drive part 54, in this case using a pneumatic cylinder, to a position where there is no overlap at all, as can be seen from the cross-sectional view of Figure 2c, the plug valve 55 is in the closed position.

[0057] As shown in Fig. 2b, the pneumatic cylinder 54 engages in the form of a hinge with the clamping point of the valve body 52 that is eccentric with respect to the pivot axis 52', or with the flange 59 that projects radially from the valve body 52, or with the entire encoder shaft 53, specifically at its drive unit side end 53a. In the case of the pneumatic cylinder 54 that can be actuated from both sides, the valve body 52 can be pivoted back and forth between the open pivot position and the closed pivot position.

[0058] As shown in the enlarged view of Fig. 2a, the valve body 52, which is designed to be rotationally symmetric about the pivot axis 52', i.e., the longitudinal extension of the valve body 52, has a frustoconical outer peripheral contour at least in the axial region of the outlet 52A1 of its lateral hole 52A2. Those outlets are preferably located at the same axial position but only with different rotational positions, specifically, on opposite sides with respect to the pivot axis 52', i.e., the axial direction. Also, the seat body 51 has an inner peripheral contour of a similar shape.

[0059] The inner peripheral contour 51AA is configured as a seat surface made of a hard material along the entire inner peripheral contour that has an axial extension preferably larger than the axial extension of the outlet 51A2 at least around the outlet 51A1, particularly over the entire extension of the frustoconical region.

[0060] As shown in the enlarged view of Fig. 2a, when wear, i.e., abrasion, occurs on the outer peripheral surface of the frustoconical valve body 52, even if the outlets 51A1 and 52A1 facing each other in the open position do not completely overlap each other axially at 52' in the open position but only partially overlap, the valve body can be held in close contact with the inner peripheral surface of the seat body 51 by being further displaced axially to the right.

[0061] For this reason, the plug shaft 53 is axially preloaded in the direction of the narrow end of the frustoconical region using a preloading element 56 such as a spring.

[0062] In this case, the wear state is detected by a wear sensor 61, such as a distance sensor 61, which is fixedly attached to the end face of the plug shaft 53, here the right end 53b, and can be notified to a control unit (not shown) of the valve device 50 or to a higher unit such as a piston type metering means 1, for example.

[0063] After that, the plug shaft 53 is pulled out axially to the left, and the worn valve body 52 can be replaced.

[0064] As shown in the figure, in this case, the valve body 52 represents, for example, a frustoconical region of the entire plug shaft 53, and also, compared with the seat body 51, which is usually made of a metal additionally hardened at the seat surface 51A, the entire cross section thereof is made of a softer material. The valve body 52 extends in a direction transverse to the longitudinal direction 52', and can be pushed in so that the shapes fit, for example, using a T-shaped groove formed in the end face facing the valve body 52 in the regions 53a, b of the plug shaft 53. Thereby, the valve body 52 cannot be detached from these regions 53a, b any longer in the state where the plug shaft 53 is attached.

[0065] The plug shaft 53 is supported by a radial rolling bearing in the end region 53b adjacent to the small diameter part of the frustoconical part. In contrast, in the opposite end region 53a, which is the end region adjacent to the turning drive part 54 here, it is placed only on the elastic peripheral seal 58a arranged on the seat body 51 in order to always ensure close contact between the valve body 52 and the seat surface 5A of the seat body 51.

[0066] Also, the plug shaft is sealed on both sides with respect to the seat body 51 by additional seals 58b, c surrounding the periphery of the plug shaft in the vicinity of the frustoconical region.

[0067] Seals 58b, c, which are further axially away from the supply flow path 51A2, are both preferably provided with a cleaning pocket 57 that annularly surrounds the plug shaft 53 and is formed on the inner circumference of the seat body 51. The pocket 57 is connected to the cleaning circuit via a visible outlet there, and in order to carry out the material that has reached the pocket 57 from the supply flow path 51A2 despite the seal, the cleaning liquid is continuously or at time intervals flowed through the pocket 57.

[0068] On the inner circumference of the main body 51, additional cleaning pockets 57 are also provided in the axial region of the outlet 51A1, that is, in the frustum-shaped region. These additional cleaning pockets 57 are shown in Fig. 2c, but all extend only to a part of the inner circumference, specifically, only to the region where the outlet 52A1 of the lateral hole 52A2 is located at the rotational position of the valve body 52 corresponding to the closed valve position.

[0069] These valve pockets 57 are also connected to the cleaning circuit via the illustrated supply flow path and are periodically cleaned. For this reason alone, no material, nor any abrasive particles contained therein, will permanently accumulate on most of the outer circumference of the valve body 52.

[0070] The end position is monitored with respect to the pivoting position of the valve body 52. Here, one end 53a of the plug shaft 53, which is the end on the drive part side, is monitored using an angle sensor 60 with respect to its rotational position centered on the pivot axis 52'.

[0071] As shown in the figure, this is carried out using an angle sensor 60 that is specifically non-contact and is directed towards the end face of the plug shaft 53 or, here, towards a protrusion 59 that protrudes radially with respect to the plug shaft 53. The sensor can detect whether the plug shaft 53 is in the end position and in which end position it is using the markings on the above-mentioned end face that are spaced along the circumference corresponding to the two end positions.

[0072] Figures 3a and 3b show a second design of the plug valve 55 from the same line of sight as Figures 2a and 2b. Similarly, the valve body 52 that can rotate about the axial direction has a cylindrical outer periphery and is preferably made of a highly elastic material that expands radially when axially pressed over its entire cross-section.

[0073] Thus, when wear occurs on the cylindrical outer peripheral surface of the valve body 52 clamped between the end regions 5a, b of the plug shaft 53 that can be made of a hard material such as metal, for example, the valve body 52 can be axially more strongly compressed by two tension screws 62a, b that extend axially and are remote from the transverse hole 52A2 and pull the two end regions 53a, b closer to each other as shown here.

[0074] As can be seen from the enlarged view of Figure 3a, the valve body 52 thereby expands radially and continues to be in close and tight contact with the seat surface 51A, which is the inner periphery of the seat body 51, regardless of wear.

[0075] In the case of the cylindrical valve body 52 that is always axially in the same position relative to the seat body 51, the plug shaft 53 can be mounted by rolling bearings in the two end regions, but it is also possible to mount it in the conventional manner using radial bearings on both sides or using an additional axial bearing on one side. As the clamping of the valve body 52 increases, according to Figure 3a, the end region 53b of the plug shaft 53 that is far from the axial bearing located on the left side here moves gradually closer to the other end region 53a.

[0076] Figure 4 shows a third design of the plug valve 55 from the same line of sight as Figures 2a and 3a. For opening and closing, the valve body 52 is axially displaceable back and forth in a direction transverse to the extending direction of the through-flow path 52A2 of the valve body 52, that is, in the longitudinal direction, using a slide drive 62 in this case. The slide drive 62 acts on the left end face of the plug shaft 53 that can have a rectangular or circular cross-section.

[0077] The plug shaft 53, therefore, preferably does not contact the axial stop portion at any functional position, but the sensor 61 can also detect in which of the two axial end positions, i.e., the open position or the closed position, the plug shaft 53 is currently located.

[0078] Also here, the valve body 52 made of an elastic material can be axially held under preload in order to compensate for wear in the radial direction by the radial expansion caused by the preload.

[0079] The preload can be generated in various ways.

[0080] As shown in the lower half of the enlarged view, the end portion 53a connected to the slide drive portion 62 has a protrusion protruding axially on the end face facing the valve body 52, and this protrusion is designed as a threaded bolt and extends laterally with respect to the through-flow passage 52A2 across the through-flow passage 52A2.

[0081] In this case, it is not important whether the threaded bolt is centered with respect to the end portion 53a and whether the through-flow passage 52A2 is eccentric, or whether the through-flow passage 52A2 is centrally arranged and such a threaded bolt extends laterally to the through-flow passage 52A2, either on one side or the other, for example.

[0082] The axial elastic element is, for example, a disc spring 64, and optionally together with the sleeve-shaped end portion 53b, after screwing the valve body 52 with a corresponding through-opening extending axially for this purpose, it is screwed onto the threaded bolt, and then the tension nut 63 is screwed and tightened.

[0083] As wear progresses, the axial elastic element, for example the disc spring 64, expands from the illustrated flat disc shape and in this process applies a substantially uniform axial force to the valve body 52, thereby coming into close radial contact with the inner circumference 51AA of the seat body 51.

[0084] In the axial region of the sleeve-shaped end portion 53b, if necessary, the seal or bearing may be arranged on the opposite side of the seat portion 51 in the attached state.

[0085] Shown in the upper half is that a threaded hole is located on the end face of the other end portion 53b facing the valve body 52, so that in order to apply an axial preload to the elastic element and thus to the valve body 52, the end portion 53b can be screwed onto the threaded bolt in this case also after the valve body 52 and the elastic element have been screwed in.

[0086] For this purpose, the threaded bolt and the threaded hole should of course also extend centrally, but this is because the two parts are aligned with each other during tightening regardless of the rotational position, and thus the through-flow passage 52A2 needs to extend eccentrically so that the two do not come into contact.

[0087] It is advantageous that the end portion 53b can have an arbitrary length in the axial direction, so that it can be attached relatively far in the seat body 51 as shown in the overall view of FIG. 4, and this attachment requires the plug shaft 53 to be axially displaceable and also includes having a cleaning pocket between the seat surface 51A and the bearing point.

[0088] Here too, the peripheral seal can be used simultaneously as a sliding bearing.

Explanation of Reference Numerals

[0089] 1 Piston-type metering means 2 Main body, seat body 3 Metering cylinder 4 Metering piston 5 Inlet line 6 Outlet line 7 Outlet opening 12 Piston rod 14 Inlet valve 15 Outlet valve 17 Receiving container 18 Motor 50 Valve device 51 Seat body Seat surface of 51A Inner peripheral surface of 51AA Outlet of 51A1 Supply flow path, protruding flow path of 51A2 Seat body of 51.1 Plug, valve body of 52 End regions of 52a, b Swivel axis, axial direction of 52’ Sealing surface of 52A Outer peripheral surface of 52AA Outlet of 52A1 Through-flow path, transverse hole of 52A2 Plug shaft of 53 Markings of 53A, B Side parts, ends of 53a, b Swivel drive unit, pneumatic cylinder of 54 Plug valve of 55 Preloading element of 56 Washing pocket of 57 Seals of 58a - c Flange of 59 Angle sensor of 60 Wear sensor of 61 Tension screws of 62a, b Tension nut of 63 Dish spring of 64 Material M

Claims

1. A metering device having one metering means (1) for each component, in particular for metering viscous materials and optionally for simultaneously mixing a plurality of components in the form of a viscous material, comprising: an inlet line (5) and an outlet line (6) from the receiving container (17) opening into the metering cavity; a valve device (50) provided with an inlet valve (15) in each inlet line (5); a valve device (50) provided with an outlet valve (16) in each outlet line (6), in the metering device, at least one of the valves (15, 16) is designed as a plug valve (55) having a valve body (52) as a closing element in a seat body (51); the through-flow path (52A2) of the material through the valve body (52) extends through the valve body (52) transversely to the axial direction of the valve body (52); the valve body (52) is rotatable about the axial direction or displaceable in a direction transverse to the axial direction and transverse to the transverse direction; A metering device, characterized in that.

2. The metering device according to claim 1, wherein the metering means (1) is a piston-type metering means (1); comprising a metering cylinder (3), in which a metering piston (4) is displaceable by a motor (18) via a piston rod (12) or a plunger, characterized in that.

3. The metering device according to any one of the preceding claims, wherein the seat surface (51A) of the valve seat is composed of a material harder than the adjacent sealing surface (52A) of the valve body (52), in particular hardened metal; In particular, the sealing surface (52A) adjacent to the seat surface (51A) of the valve seat, in particular, the entire inner peripheral surface (52AA) of the valve body (52) is composed of a plastic material, in particular HPU, PTFE, or polyethylene, characterized in that.

4. The metering device according to any of the preceding claims, wherein the material of at least the sealing surface (52A) of the valve body (52), in particular the entire outer peripheral surface (52AA), has a Shore hardness of at most 96, in particular at most 70, in particular at most 55, and / or a tensile strength of at most 60 MPa, in particular at most 50 MPa, and / or an ultimate elongation of at least 350%, in particular at least 400%, characterized in that.

5. The metering device according to any of the preceding claims, wherein In the case of a rotatable valve body (52), the plug valve (55) comprises a frustoconical valve body (52), in particular, a metering device, characterized in that the taper angle (α) of the truncated cone with respect to the axial direction (52') is at least 10°, preferably at least 20°, preferably at least 30°.

6. A metering device according to any one of the preceding claims, wherein the valve body (52) is preloaded in the axial direction (52') with respect to the valve seat, in particular with respect to the inner peripheral surface (51AA), a metering device.

7. A metering device according to any one of claims 1 to 4, in the case of a rotatable valve body (52), the plug valve (55) has a cylindrical outer peripheral surface (52AA), and the body (51) has a cylindrical inner peripheral surface (51AA), in the case of an axially displaceable valve body (52), the plug valve (55) has an arbitrary desired cross-sectional shape, and the seat body (51) has a similar cross-sectional shape, a metering device.

8. A metering device according to any one of the preceding claims, on the side of the valve body (52), at least the material of the sealing surface (52A) is soft and highly elastic, so that the diameter of the outer peripheral surface (52AA) of the valve body (52) in the axial region of the outlet (52A1) of the valve body (52) can be enlarged by axial compression of the valve body (52), a metering device.

9. A metering device according to any one of the preceding claims, wherein the valve body (52) is an axial part of a plug valve (53) rotatable about the axial direction (52'), in particular, a metering device, characterized in that it protrudes from both sides of the seat body (51) of the plug valve (55).

10. A metering device according to any one of the preceding claims, wherein the valve body (52) is made of the same material, in particular a plastic material, including the peripheral surface (52AA) of the valve body (52), and is non-rotatably and / or axially fixedly connected to the two end portions (53a, b) of the plug valve (53), in particular detachably connected. In particular, applying an axial force to the valve body (52) between the two ends (53a, b) can be achieved by either axially preloading the two ends (53a, b) against each other, or by bringing one end into contact with a stop portion, in particular an axial bearing, in the axial direction and applying an axial force to the other end. A metering device characterized by this.

11. A metering device according to any of the preceding claims, wherein the plug shaft (53) is operably connected to a swivel drive part (54) or a slide drive part (62), wherein the plug shaft (53) is radially mounted only on an elastic seal (58) surrounding it in the circumferential direction on the preloading side (53a), and / or A metering device characterized in that the plug shaft (53) is mounted on a rolling bearing at least in the radial direction, and particularly also in the axial direction, on the side (53b) facing opposite to the axial preloading.

12. A metering device according to any of the preceding claims, a monitoring part for the rotation angle and / or the axial position of the valve body (52), particularly of the entire plug shaft (53), is provided, In particular, a flange (59) protruding radially beyond the plug shaft (53) and a rotational position centered on the axial direction (52') are monitored, particularly in a non-contact manner, and an angle sensor (60) capable of monitoring the end position of the plug shaft (53), particularly the flange (59). A metering device characterized by being in this form.

13. A metering device according to any of the preceding claims, at least one cleaning pocket (57) connected to a cleaning circuit is provided at the stop position of the outlet (52A1), and is spaced from the seat surface (51A) in the circumferential direction on the inner circumferential surface (51AA) of the seat body (51) facing the valve body (52). A metering device characterized by this.

14. A metering device according to any of the preceding claims, at least one cleaning pocket (57) connected to a cleaning circuit is spaced from the seat surface (51A) in the axial direction (52') on the inner circumferential surface (51AA) of the main body (51) facing the valve body (52), preferably on both sides. A metering device characterized by this.

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