Metering device, assembly for such a metering device, and method for operating a closure of a metering device

Abstract

The invention relates to a metering device for metering bulk material, comprising a selectively operable closure. The invention also relates to an assembly for such a metering device and / or adapted for use in such a metering device. The invention further relates to a method for selectively operating a closure of a metering device for metering bulk material.

Description

Technical Field

[0001] This invention relates to a metering device for metering bulk materials, the metering device having a selectively operable closure. The invention also relates to a component for use in and / or adapted for use in such a metering device. Furthermore, the invention relates to a method for selectively operating the closure of a metering device for metering bulk materials. Background Technology

[0002] In the operation of metering devices used to measure bulk materials, the reliable and safe discharge of the bulk materials to be measured is a core concern. In this context, it is important that the bulk materials reach the downstream processes of the metering process as controlled as possible.

[0003] On the one hand, it is desirable to achieve the desired material discharge with precision. In this regard, for example, the most accurate metering possible should be achieved for bulk materials. On the other hand, unwanted material discharge should be avoided as much as possible. In this regard, for example, during the initial filling of the unit with the bulk material to be metered, at least a portion of the bulk material should be prevented from overflowing from the metering unit. "Follow-up flow" of material should also be avoided as much as possible during pauses in the metering process. This is particularly critical in batch metering, where periodic pauses for material discharge are necessary.

[0004] The goal is to further improve the effectiveness of existing solutions. Summary of the Invention

[0005] Therefore, the object of the present invention is to overcome the above-mentioned defects of the prior art, and in particular to provide a solution that can control the discharge of the bulk material to be measured as accurately as possible.

[0006] According to a first aspect of the invention, this objective is achieved by a metering device for metering bulk materials, the metering device having a selectively operable closure, the metering device having

[0007] - At least one discharge member rotatably arranged within a conveying channel for conveying bulk material within the conveying channel in the conveying direction to at least one discharge opening of the conveying channel, wherein the discharge member has at least one shaft or is connected to at least one shaft, which is preferably end-supported on the opposite side of the discharge opening in the conveying direction, and

[0008] - Capable of moving at least one closing element along at least one movement path between at least one operating position and at least one closed position, for at least partially closing the discharge opening.

[0009] The shaft extends through the closed element.

[0010] According to a second aspect of the first invention, this objective is achieved by a metering device for metering bulk materials, the metering device having a selectively operable closure, the metering device having

[0011] - At least one discharge member rotatably arranged within the conveying channel for conveying bulk material within the conveying channel to at least one discharge opening of the conveying channel.

[0012] The discharge component is supported at the ends, and

[0013] - At least one closing element movable between at least one operating position and at least one closed position, for at least partially closing the discharge opening.

[0014] The central axis of the discharge component can be defined, which extends through the closure element, and the movement path of the closure element extends along or parallel to the central axis.

[0015] This invention is based on an unexpected discovery that by maintaining a constant gap between the discharge member and the conveying channel, the safe and reliable discharge of bulk material to be metered from the metering device can be achieved. According to the invention, since the discharge member is end-supported, its position relative to the conveying channel can be reliably maintained over its entire extension. This avoids contact between the discharge member and the inner surface of the conveying channel, thereby preventing interference with the metering process and even damage to parts of the metering device.

[0016] For the sake of readability, the term "measuring device" is used only in other descriptions, but unless the context otherwise indicates or specifies otherwise, this description applies to both the measuring device according to the first point of the first aspect of the invention and the measuring device according to the second point of the first aspect of the invention.

[0017] By having the shaft extend through the closure element in the first point of the first aspect of the invention, and / or by having the central axis of the discharge member also extend through the closure element in the second point of the first aspect of the invention, the end supports of the shaft and / or discharge member can be combined with the closure element, thereby enabling the avoidance of undesirable material discharge during specific time periods (such as during batch metering or filling).

[0018] Therefore, by achieving the desired material discharge more accurately and avoiding the unwanted material discharge more reliably, the proposed metering device can improve the metering process as a whole.

[0019] Preferably, the sealing element moves to the operating position when the metering process is performed using or requires the use of a metering device and material is discharged. Preferably, the sealing element moves to the closed position when material discharge is not performed using or does not require the use of a metering device.

[0020] The discharge component can be, for example, a screw and / or a helical member. For example, the helical portion of the screw and / or helical member can be arranged along at least one section of the shaft.

[0021] If the shaft is connected to the discharge member, especially to the end of the discharge member arranged in the area of ​​the discharge opening, and the discharge member preferably does not have a shaft at least in that end area, then preferably the end of the shaft not connected to the discharge member is supported by the end.

[0022] Preferably, the central axis of the discharge component and / or the central axis of the shaft extend vertically through the surface defined by the discharge opening, and / or extend through the center of the discharge opening.

[0023] The measuring device can be, for example, a differential weighing scale.

[0024] Measuring devices are particularly suitable for use in batch measurement situations.

[0025] The metering device preferably has a conveying channel. In particular, the conveying channel has a circular cross-section at least in sections and / or at least in the plane of cross-section.

[0026] Examples of favorable bulk materials to be measured include stone, building materials (especially topsoil, sand, gravel and / or cement), raw materials (especially ores, coal, clay and / or de-icing salt), food (especially grains, sugar, salt, coffee and / or flour) and / or powdered materials (especially pigments, fillers, granules and / or pellets).

[0027] The type of bulk material to be measured may be, for example, one of the following bulk material types: dust, powder, flour, granules, pellets, debris, lumps, pellets and / or other types.

[0028] Preferably, the motion path extends between the running position and the closed position, and includes both the running position and the closed position.

[0029] Preferably, the motion path is predetermined by an axis and / or a central axis, and / or extends along at least one segment of the axis and / or the central axis.

[0030] The motion path can be, for example, the motion path of the center of gravity or center point of the closing element or a portion thereof (such as the retaining element and / or sealing element described in detail below), and / or the motion path of the center point of the closing element or a portion thereof (such as the retaining element and / or sealing element described in detail below) in the cross section of the closing element.

[0031] The central axis can be advantageously defined and / or may be defined. It should be understood that the central axis does not refer to the physical features of the component. The central axis actually refers to an axis defined by geometric geometry. This defined and / or definable central axis extends infinitely in both directions, particularly at both ends.

[0032] For example, the central axis extends through the discharge component.

[0033] Alternatively or supplementally, it may be specified that the discharge member is used to convey bulk material in the conveying channel along the conveying direction to at least one discharge opening of the conveying channel, and / or the discharge member is connected to a shaft, which is fixed to the metering device, particularly on the opposite side of the discharge opening in the conveying direction.

[0034] In other words, the metering device therefore advantageously has at least one discharge member rotatably arranged within the conveying channel for conveying bulk material within the conveying channel to at least one discharge opening of the conveying channel.

[0035] The end support of the discharge member can be particularly advantageously provided by means of a shaft. Preferably, the discharge member is connected to the shaft at an end opposite to the end of the discharge member at which the discharge member is driven.

[0036] The shaft can be advantageously fixed at the measuring device (especially at the housing of the measuring device). Thus, the shaft is restricted in its translational and / or rotational degrees of freedom. In embodiments, the shaft is restricted in one or more degrees of freedom (especially translational and / or rotational). For example, the shaft may be restricted in one, two, or three translational degrees of freedom. Alternatively or additionally, the shaft may be restricted in one, two, or three rotational degrees of freedom.

[0037] For example, the shaft can be rigidly connected to the measuring device, especially the housing of the measuring device. For example, the shaft can be displaceably connected to the measuring device along the direction of movement.

[0038] Advantageously, when the sealing element moves from the operating position, especially along the movement path, to the sealing position, the direction of movement of the sealing element extends in the opposite direction to the conveying direction.

[0039] Alternatively or supplementally, it may be specified that the shaft is fixed in place and / or sealed off from the environment relative to the metering device.

[0040] Advantageously, the fixed shaft remains in a constant position relative to the measuring device and / or cannot be rotated.

[0041] Alternatively or supplementally, it may be specified that the discharge component and the shaft are rotatably connected relative to each other.

[0042] Alternatively or supplementally, it may be specified that the discharge member has a shaft, and the shaft of the discharge member has a recess, the end section of the shaft being received or being received within the recess.

[0043] In this regard, the shaft of the discharge member, referred to as the discharge member shaft, can thus be used as a receiving part for the shaft body. As a result, the discharge member can be connected to the shaft body in a very reliable and simple manner.

[0044] Alternatively or supplementally, it may be specified that the discharge member shaft is rotatable relative to the shaft body, and / or wherein a sliding bushing is provided in the recess of the discharge member shaft, and the end section of the shaft body is received in the sliding bushing.

[0045] Sliding bushings enable reliable operation.

[0046] Alternatively or additionally, it may be specified that the shaft has a reduced outer diameter in the region of the end section, and / or that the outer diameter does not change abruptly along the conveying direction and / or remains constant in the external transition region between the shaft and the discharge member shaft.

[0047] By reducing the outer diameter, the recess in the discharge component shaft can have a reduced diameter. A constant outer diameter in the transition region can prevent or at least reduce the accumulation of bulk material in that region.

[0048] Alternatively or supplementally, it may be specified that the shaft has a larger outer diameter in the transition region between the shaft and the discharge member than the region adjacent, especially immediately adjacent, to the transition region along the conveying direction, and wherein the closing element or a portion thereof contacts a section of the shaft in the transition region in the closed position.

[0049] Therefore, it is advantageous to achieve sealing and isolation relative to the shaft in a particularly simple manner.

[0050] A further particular advantage is that the sealing element does not contact the shaft in the operating position. Therefore, a sealed isolation relative to the shaft can be achieved depending on the position of the sealing element.

[0051] Alternatively or supplementally, it may be specified that during the transfer of the closing element from the running position to the closed position along the movement path, when the closing element is in the running position, the end section of the shaft is received to the maximum extent in the recess of the discharge member shaft, and when the closing element is in the closed position, the end section of the shaft is received to the minimum extent in the recess of the discharge member shaft.

[0052] Advantageously, the shaft position remains unchanged, the discharge member (especially along and / or parallel to the central axis) is displaceable, and / or the closing element (especially at the end of the discharge member) is rigidly connected to the discharge member.

[0053] Alternatively or supplementally, it may be specified that, during the movement of the closing element from the operating position to the closed position, the portion of the end section of the shaft receiving within the recess of the discharge member shaft is reduced.

[0054] Alternatively or supplementally, it may be specified that the discharge component is reciprocating, used to move the closing element along the movement path between the running position and the closing position, wherein preferably the outgoing movement is opposite to the conveying direction and the return movement is in the conveying direction.

[0055] For example, the closure element is rigidly connected to the discharge member here (especially at the end of the discharge member).

[0056] Alternatively or supplementally, it may be specified that when the closure element is in the operating position, the discharge component protrudes further from the conveying channel along the conveying direction compared to when the closure element is in the closed position.

[0057] This can be achieved, for example, through the displacement of the aforementioned discharge component.

[0058] Alternatively or supplementally, it may be specified that when the closure element is in the operating position, the discharge member protrudes out of the conveying channel in the conveying direction, and / or when the closure element is in the closed position, the discharge member does not protrude out of the conveying channel in the conveying direction.

[0059] Alternatively or supplementally, it may be specified that the shaft has multiple partial shafts that are interconnected to transmit force along the shaft.

[0060] Because the shaft is composed of multiple parts, shaft assembly is simplified. Here, the various shaft parts are connected to each other in a manner that allows for non-destructive disassembly. However, at least some of the shaft parts can also be permanently connected to each other (e.g., by welding).

[0061] Alternatively or additionally, it may be specified that the end section of the first part of the shaft is configured to be received in the recess of the discharge member shaft, and wherein preferably (i) the second part of the shaft is rigidly connected to the first part of the shaft and is disposed behind the first part of the shaft in the conveying direction, and / or (ii) the closure element is configured integrally with the first part of the shaft or the second part of the shaft.

[0062] If the sealing element is connected to a portion of the shaft, the sealing element can be removed by taking out the corresponding portion of the shaft. This facilitates the replacement or maintenance of the sealing element.

[0063] Rigidly connected shafts are particularly good at transmitting force along the shaft, whether the shaft is subjected to tension or compression.

[0064] One of the shafts, especially the second shaft, may be constructed, for example, by a piston, which is displaceably disposed in a cylinder.

[0065] Alternatively or supplementally, it may be specified that, during the movement of the closing element from the running position to the closed position along the movement path, when the closing element is in the running position, the end section of the shaft is received to a minimum extent within the recess of the discharge member shaft, and when the closing element moves to the closed position, the end section of the shaft is received to a maximum extent within the recess of the discharge member shaft.

[0066] Advantageously, the shaft (especially along and / or parallel to the central axis) is displaceable, the position of the discharge member remains unchanged, and / or the closing element is rigidly connected to the shaft (especially to the first part of the shaft).

[0067] Alternatively or supplementally, it may be specified that, during the movement of the closing element from the operating position to the closed position, the portion of the receiving portion of the end section of the shaft in the recess of the discharge member shaft is increased.

[0068] For example, it can also be specified that the shaft is reciprocating to move the closing element between a running position and a closed position along a motion path, wherein preferably the outgoing motion is opposite to the conveying direction and the return motion is in the conveying direction. For example, the closing element can be rigidly connected to the shaft (especially to the first part of the shaft).

[0069] Alternatively or additionally, the metering device may be configured such that, during the transfer of the closing element from the operating position to the closing position along the movement path, a variable portion of the end section of the shaft is introduced into the recess of the discharge member shaft, in particular an increased or decreased portion.

[0070] Depending on the change in this proportion, the discharge component or shaft may be selectively set to remain in a fixed position, for example.

[0071] Alternatively or supplementally, the shaft may be provided with a recess in which a portion of the discharge member (such as a pin of the discharge member or an end section of the discharge member shaft) is received.

[0072] Therefore, the shaft can be connected to the discharge member very easily. For example, the shaft can be fitted onto or can be fitted onto a portion of the discharge member.

[0073] Alternatively or supplementally, it may be specified that a sliding bushing is provided in the recess of the shaft, and the portion of the component that is discharged is received in the sliding bushing.

[0074] This enables a particularly reliable connection between the discharge component and the shaft.

[0075] Alternatively or supplementally, it may be specified that the proportion of the discharge component received in the shaft increases during the transfer of the closing element, particularly along the motion path, from the running position to the closed position.

[0076] Preferably, the shaft (especially along and / or parallel to the central axis) is displaceable, and / or the position of the discharge member remains unchanged.

[0077] Alternatively or supplementally, it may be specified that the proportion of the discharge component received within the shaft body is reduced, especially during the movement of the enclosing element from the operating position to the enclosing position along the motion path.

[0078] Preferably, the discharge member (especially along and / or parallel to the central axis) is displaceable, and / or the shaft position remains unchanged.

[0079] Alternatively or supplementally, it may be specified that when the closing element is in the operating position and the closed position, the shaft and the discharge component have the same position along the conveying direction.

[0080] In other words, in these two positions, the shaft and the discharge component are preferably positioned similarly relative to each other.

[0081] Alternatively or additionally, it may be specified that the discharge member has at least one shaft or is connected to such shaft, which is supported, in particular, on the opposite side of the discharge opening in the conveying direction, especially by end support.

[0082] For example, the discharge member can be constructed without a shaft (especially without a discharge member shaft), but connected to the aforementioned shaft at its end (preferably at the end opposite to the driven end of the discharge member). For this purpose, the discharge member and the shaft can advantageously be connected to each other without relative torsion.

[0083] By connecting the discharge member to the aforementioned shaft, the discharge member can be advantageously end-supported.

[0084] However, it is also advantageous for the discharge member to have a shaft (such as the metering device mentioned above in the first point of the first aspect of the invention), and for the end support of the discharge member to be achieved by end support of the shaft.

[0085] Alternatively or supplementally, it may be specified that the shaft and / or shaft body extend through the enclosing element.

[0086] For example, the shaft could be a shaft connected to the discharge component.

[0087] Alternatively, it may be specified that the discharge components and shafts are constructed as a single unit.

[0088] Alternatively or supplementally, it may be specified that the shaft has multiple partial shafts that are interconnected to transmit torque along the shaft.

[0089] Because the shaft consists of multiple parts, shaft assembly is simplified. The individual shaft parts can be connected to each other in a way that allows for disassembly and reassembly without damage.

[0090] However, at least some of the shafts can also be permanently connected to each other (e.g., by welding).

[0091] Alternatively or supplementally, it may be specified that the closing element is movable relative to the discharge member, the discharge member shaft, the shaft and / or the shaft body.

[0092] According to the design scheme, it is therefore possible to advantageously realize the movement of the closed element from the operating position to the closed position and vice versa.

[0093] Alternatively or supplementally, it may be specified that the closure element is rigidly connected to the discharge member, especially to the end of the discharge member.

[0094] In this way, for example, the movement of the discharge component can also cause the closing element to move (specifically, in phase and / or along and / or parallel to the central axis, respectively).

[0095] Alternatively or supplementally, it may be specified that the sealing element is rigidly connected to the shaft and / or constructed as an integral part of the shaft.

[0096] In this way, for example, the movement of the shaft can also cause the closed element to move (specifically, in phase and / or along and / or parallel to the central axis, respectively).

[0097] Alternatively or supplementally, the closure element may be provided with a sealing element, wherein the sealing element contacts the outer surface of the discharge member or a portion thereof, particularly the outer surface of the end section of the discharge member shaft, in the closed position, and / or the sealing element does not contact the outer surface of the discharge member or a portion thereof in the operating position.

[0098] Therefore, sealing isolation relative to the discharge member can be achieved in a particularly simple manner. Consequently, sealing isolation relative to the discharge member can be advantageously achieved based on the position of the sealing element.

[0099] Alternatively or additionally, the closing element may have a plate-shaped, disc-shaped, or annular base, which preferably at least partially closes the discharge opening in the conveying direction in the closed position, and / or the closing element has a sealing element that seals against the edge of the discharge opening in the closed position.

[0100] Preferably, the substrate is plate-shaped, disc-shaped, or annular in at least one cross-sectional plane of the metering device, and this cross-sectional plane is preferably perpendicular to the central axis of the discharge component.

[0101] Alternatively or additionally, it may be specified that the closing element, in particular the base, is fastened to and / or integral with the discharge member, discharge member shaft, shaft and / or shaft body, and preferably extends radially outward from there along the entire circumferential direction.

[0102] Alternatively or additionally, it may be specified that at least one section of the movement path extends on the opposite side of the discharge opening in the conveying direction.

[0103] Alternatively or supplementally, it may be specified that the closing element extends circumferentially, at least partially, around the central axis of the discharge member.

[0104] Alternatively or supplementally, the closing element may be provided with at least one sealing element, which preferably contacts or is in contact with the discharge member, discharge member shaft, shaft and / or shaft body at least when the closing element is moved to the closed position.

[0105] This allows for a reliable sealing and isolation of the conveying channel relative to the environment in the area surrounding the discharge component, the discharge component shaft, the shaft, and / or the shaft body. This reliably avoids or at least reduces subsequent flow of bulk material after material discharge has ended or during pauses, as well as discharge of bulk material in other situations (such as during the filling of a metering device with bulk material).

[0106] The sealing element may, for example, have one or more sealing lips, wherein at least one of the sealing lips contacts or can form contact with the discharge member, the discharge member shaft, the shaft and / or the shaft body, especially at least when the sealing element is moved to the closed position.

[0107] Preferably, the sealing element at least partially, and preferably completely, seals the conveying channel in the area between the discharge member, the discharge member shaft, the shaft and / or the shaft body and the sealing element at at least one location along the movement path of the sealing element, especially in the closed position. The sealing effect between the discharge member, the discharge member shaft, the shaft and / or the shaft body and the sealing element is advantageously applicable here to bulk materials when there is a pressure difference between 0 mbar and 100 mbar between the conveying channel and the environment.

[0108] Here, "environmentally favorable" refers to the area located outside the conveying channel, following the discharge opening in the conveying direction.

[0109] Alternatively or additionally, it may be specified that the preload of at least part of the sealing element along the movement path is position-dependent, at least in part, due to the position-dependent interaction between the shaft, discharge member (especially the discharge member shaft) and / or shaft body and the sealing element along the movement path.

[0110] The inventors recognized that by setting appropriate interactions, different sealing effects between the shaft, the discharge member, the discharge member shaft and / or the shaft body and the sealing element can be adjusted at different positions along the movement path. Thus, through suitable interactions, a greater preload can be adjusted, for example, at at least one position requiring a high sealing effect (e.g., the closed position), while a smaller preload, or even no preload, can be adjusted at at least one position requiring a lower or even no sealing effect (e.g., the running position).

[0111] Furthermore, for example, by generating interactions at the operating position that do not cause (mechanical) stress to the sealing element or cause only minor (mechanical) stress, position-dependent interactions can be used to avoid or reduce wear on the sealing element.

[0112] Preferably, the interaction between the discharge member, the discharge member shaft, the shaft and / or shaft body and the sealing element is a mechanical, electrical and / or magnetic interaction.

[0113] Preferably, the position-related interactions considered along the motion path are of the same type and / or have position-related interaction strengths.

[0114] Preload can be caused, for example, by bending of the sealing element or a portion thereof. For instance, a greater degree of bending of the sealing element or a portion thereof results in a greater preload than a relatively smaller degree of bending of the sealing element or a portion thereof (which therefore produces a relatively smaller preload).

[0115] Preferably, in the sense of the invention, a position-dependent interaction exists when, along the movement path at at least one first position (and / or along at least one first segment), a specific type of interaction with a first interaction strength occurs between the discharge member, discharge member shaft, shaft and / or shaft body and the sealing element or a portion thereof, and when, along the movement path at at least one second position (and / or along at least one second segment), a specific type of interaction with a second interaction strength different from the first interaction strength, particularly greater or smaller, occurs between the discharge member, discharge member shaft, shaft and / or shaft body and the sealing element or a portion thereof, a second interaction strength different from the first interaction strength. Zero first or second interaction strength can also advantageously constitute an interaction.

[0116] Preferably, in the sense of the invention, a position-dependent interaction also exists when a specific type of interaction with a first interaction strength occurs between the discharge member, discharge member shaft, shaft and / or shaft body and the sealing element or a portion thereof at at least one first position (and / or along at least one first segment) along the movement path, and when no specific type of interaction occurs between the discharge member, discharge member shaft, shaft and / or shaft body and the sealing element or a portion thereof at at least one second position (and / or along at least one second segment) along the movement path.

[0117] Alternatively or supplementally, it may be specified that, at least when the closing element is moved to the closed position, the sealing element seals against at least one circumferential section of the shaft, the discharge member (especially the discharge member shaft), and / or the shaft body.

[0118] Therefore, the conveying channel can be reliably sealed off from the environment in the area surrounding the discharge member, the discharge member shaft, the shaft and / or the shaft body. This reliably avoids or at least reduces the subsequent flow of bulk material after material discharge is completed or during a pause, as well as the discharge of bulk material in other situations (such as during the filling of the metering device with bulk material).

[0119] Alternatively or supplementally, it may be specified that, at least when the sealing element moves to the closed position, the sealing element at least partially seals and isolates the delivery channel from the environment.

[0120] Preferably, when the shaft, discharge member (especially the discharge member shaft) and / or shaft body are under the typical pressure differential mentioned elsewhere in this application, and no bulk material can overflow from the conveying channel through the discharge opening, the conveying channel is sealed and isolated from the environment by the sealing element.

[0121] Alternatively or supplementally, it may be specified that when the closing element moves to the closed position, the discharge opening is at least partially closed by the closing element.

[0122] Preferably, the discharge opening is closed by a sealing element along at least one lower region of gravity.

[0123] Alternatively or supplementally, it may be specified that the discharge opening is released through the closing element when the closing element is not in the closed position, and / or at least when the closing element is in the operating position.

[0124] In this way, the metering process can be carried out reliably because the material can be discharged without being affected by the sealing element when the sealing element is in the operating position.

[0125] Alternatively or supplementally, it may be specified that the motion path extends along the axis and / or the shaft body, and / or extends parallel to the conveying direction.

[0126] For example, the motion path may extend along the central axis of the shaft and / or the discharge component.

[0127] Alternatively or supplementally, the movement path may extend from the running position to the closed position, and / or the movement path may have an extension length of at least 0.1 cm, preferably at least 1 cm, preferably at least 3 cm, preferably at least 5 cm, preferably at least 10 cm, and / or at most 100 cm, preferably at most 70 cm, preferably at most 60 cm, preferably at most 50 cm, preferably at most 30 cm.

[0128] Therefore, the closing element can move from the operating position to the closing position along the motion path. The operating position is thus the first end of the motion path, and the closing position is the second end of the motion path.

[0129] Alternatively or supplementally, it may be specified that, in particular, at least when the closure element is in the operating position, the closure element extends circumferentially at least partially around the central axis of the discharge member, the discharge member shaft, the shaft and / or the shaft body.

[0130] Preferably, especially in the operating position, the closing element extends circumferentially around the discharge member, the discharge member axis, the shaft and / or the shaft body.

[0131] For example, the closing element may be pushed (aufschiebbar) onto the shaft and / or shaft body from the end of the shaft and / or shaft body, and / or may be positioned relative to the shaft and / or shaft body.

[0132] Alternatively or supplementally, it may be specified that the discharge component shaft, shaft and / or shaft body has at least a reduced outer diameter in sections along the conveying direction.

[0133] Therefore, position-dependent interaction between the sealing element and the shaft, discharge member shaft, and / or shaft body can be achieved in a simple yet effective manner. This is because, depending on the position of the sealing element, the shaft, discharge member shaft, and / or shaft body interact with the sealing element at varying intensities due to the position-dependent shaft or shaft body diameter.

[0134] Alternatively or supplementally, it may be specified that the discharge member shaft, shaft and / or shaft body has an increased outer diameter in at least one section, and wherein the sealing element interacts with that section of the shaft, discharge member shaft and / or shaft body when the closing element moves to the closed position.

[0135] Thus, position-related interactions can occur along the motion path between the shaft, the discharge component shaft and / or the shaft body and the sealing element, thereby introducing position-related preload into the sealing element.

[0136] Here, the interaction can advantageously be a mechanical interaction, for example, applying a force to the sealing element at least partially in the radial direction through a section of the shaft, discharge member shaft and / or shaft body having an increased outer diameter (preferably at least when the sealing element moves into the closed position).

[0137] Preferably, in the sense of this application, the increased outer diameter of the shaft, discharge member shaft and / or shaft body can be achieved, for example, by providing a sleeve fastened or constructed at the shaft, discharge member shaft and / or shaft body.

[0138] Alternative or supplementary provisions may also specify that the shaft, discharge member shaft and / or shaft body have

[0139] - At least one first section, wherein the outer diameter of the shaft, discharge member shaft and / or shaft body is a first outer diameter or has a value within a first value range, and

[0140] - At least one second section, preferably following the first section along the conveying direction, wherein the outer diameter of the shaft, discharge component shaft and / or shaft body in the second section is a second outer diameter smaller than the first outer diameter, or a value within a second value range, wherein the upper limit of the second value range is smaller than the lower limit of the first value range.

[0141] Preferably, the first segment and the second segment are connected to each other through a transition region.

[0142] Therefore, position-related interactions between the sealing element and the shaft, discharge member shaft, and / or shaft body can be advantageously achieved in a simple yet effective manner. This is because, depending on the position of the sealing element, the shaft, discharge member shaft, and / or shaft body interact with the sealing element at different intensities due to the shaft or shaft body diameter relative to the position in the first and second sections. In other words, depending on where the sealing element is located along the movement path, interaction occurs at least segmentally between the sealing element and the first or second section of the shaft, discharge member shaft, and / or shaft body.

[0143] Here, the interaction can advantageously be a mechanical interaction, at least relative to the first section. For example, the first section of the shaft, discharge member shaft, and / or shaft body can apply a first force to the sealing element at least partially in the radial direction (preferably at least when the sealing element moves to the closed position). Alternatively or additionally, the second section of the shaft, discharge member shaft, and / or shaft body can advantageously apply a second force to the sealing element at least partially in the radial direction (preferably at least when the sealing element moves to the operating position), which is preferably less than the first force. Thus, it is particularly easy to achieve that the preload generated by the interaction between the second section of the shaft, discharge member shaft, and / or shaft body and the sealing element is less than the preload generated by the interaction between the first section of the shaft, discharge member shaft, and / or shaft body and the sealing element.

[0144] Alternatively or supplementally, it may be specified that when the sealing element moves to the closed position, the sealing element interacts with the first section of the shaft, the discharge member shaft and / or the shaft body, especially at least partially contacts the first section of the shaft, the discharge member shaft and / or the shaft body.

[0145] Therefore, a particularly advantageous sealed isolation of the conveying channel can be achieved during periods when there is no material discharge (such as during material discharge pauses or when the metering device is filled before the metering process).

[0146] Alternatively or supplementally, it may be specified that when the sealing element is moved to the operating position, the sealing element (a) does not interact with the first section of the shaft, the discharge member shaft and / or the shaft body, in particular does not contact the first section of the shaft, the discharge member shaft and / or the shaft body, (b) interacts with the second section of the shaft, the discharge member shaft and / or the shaft body, in particular at least partially contacting the second section of the shaft, the discharge member shaft and / or the shaft body, and / or (c) does not contact the shaft, the discharge member shaft and / or the shaft body.

[0147] Therefore, during the metering process (during which the shaft rotates), friction between the shaft and the sealing element can be reduced, thereby reducing the wear of the sealing element.

[0148] Alternatively or supplementally, it may be specified that the difference in the outer diameter of the shaft, discharge member shaft and / or shaft body in the first section and the second section and / or at the two locations is between 0.01 mm and 400 mm, particularly between 0.01 mm and 300 mm, particularly between 0.01 mm and 250 mm, particularly between 0.01 mm and 200 mm, particularly between 1 mm and 200 mm.

[0149] It has proven advantageous to select the shaft and / or shaft body diameter according to this specification. In particular, it has been found that advantageous results can be achieved even when the difference between the shaft and / or shaft body diameters is small.

[0150] The two positions are the running position and the closed position.

[0151] Alternatively or supplementally, it may be specified that when the sealing element moves to the closed position, the outer diameter of the section of the shaft, discharge member shaft and / or shaft body that contacts the sealing element is greater than or equal to 4 mm, especially greater than or equal to 5 mm, especially greater than or equal to 10 mm, especially greater than or equal to 30 mm, especially greater than or equal to 50 mm, and / or less than or equal to 300 mm, especially less than or equal to 200 mm, especially less than or equal to 100 mm.

[0152] Advantageously, the diameter of the shaft or shaft body can be selected according to this regulation.

[0153] Alternatively or supplementally, it may be specified that the closing element has at least one retaining element that is at least partially and / or configured as annular in at least one cross-sectional plane, and

[0154] (i) wherein the shaft, discharge member shaft and / or shaft extend through the retaining element.

[0155] and / or

[0156] (ii) wherein (a) the sealing element is arranged at least partially at the retaining element, particularly at the inner periphery of the retaining element, and / or (b) the retaining element has a specific inner diameter that is greater than the maximum outer diameter of the shaft, the discharge member shaft and / or the shaft along the path of motion.

[0157] The retaining element may have a recess, particularly cylindrical in shape, in its internal region, which preferably has a circular cross-section in a plane perpendicular to the conveying direction. This facilitates the implementation of an annular retaining element. This allows the shaft, discharge member shaft, and / or shaft body to extend through the recess, and further through the sealing element. Alternatively or additionally, the recess may have a diameter corresponding to a specific inner diameter, and / or the sealing element may be arranged accordingly at the inner circumference of the recess.

[0158] Advantageously, at least when the closing element moves into the closed position, the element is kept at least partially, especially in the annular region, covering the discharge opening of the conveying channel.

[0159] For example, the retaining element may be arranged concentrically with the shaft, the discharge member shaft and / or the shaft body. For example, the retaining element may be arranged concentrically with the shaft, the discharge member shaft and / or the shaft along the entire path of motion.

[0160] Alternatively or supplementally, it may be specified that a certain inner diameter of the component is less than or equal to the outer diameter of the transport channel, and / or less than or equal to the inner diameter of the transport channel.

[0161] Advantageously, at least when the closing element moves to the closed position, the retaining element covers and thus closes at least a portion of the discharge opening. This is because when the closing element moves to the closed position and the retaining element comes into direct or indirect contact with the discharge opening (or the edge of the discharge opening), the transition area passing through the retaining element from the conveying channel in the conveying direction toward the environment gradually narrows, thereby enabling partial closure of the discharge opening. The remaining area of ​​the free discharge opening can be closed, for example, by a sealing element, and preferably sealed and isolated relative to the shaft, the discharge member shaft, and / or the shaft body.

[0162] Alternatively or supplementally, it may be specified that the closing element is guided by at least one guiding element, in particular at least one linear guide.

[0163] This ensures the safe and precise positioning of the enclosed element along the movement path.

[0164] Preferably, the closure element is guided by at least two guiding elements, especially at least two linear guides.

[0165] Alternatively or supplementally, it may be specified that the enclosing element can move along a motion path by operating at least one motion mechanism.

[0166] Preferably, the motion mechanism has at least one electric, at least one pneumatic, and / or at least one hydraulic actuator for moving the enclosed element along the motion path. The electric actuator can be implemented, for example, by a servo motor.

[0167] The driver can be connected directly or indirectly to enclosed components.

[0168] Alternatively or additionally, the motion mechanism may be specified to have at least one cylinder, preferably at least two cylinders, each having a movable piston therein and each connected to a sealing element, wherein preferably, at least one of the one or more cylinders, preferably all of them, is configured as a pneumatic cylinder or a hydraulic cylinder.

[0169] In this regard, it is particularly preferred that the actuator has a corresponding cylinder.

[0170] For example, in order to execute the movement of the sealing element along the motion path, a cylinder and at least two linear guides can be provided in the metering device. Thus, the sealing element can be moved by the cylinder, and reliable guidance of the sealing element can be achieved by the at least two linear guides.

[0171] For example, in order to execute the movement of the sealing element along the motion path, the metering device can be equipped with two cylinders, eliminating the need for a separate linear guide. Therefore, the cylinders can both drive the sealing element to move and ensure reliable guidance of the sealing element.

[0172] Alternatively or supplementally, it may be specified that the central axis of at least one cylinder, the central axis of the shaft, the central axis of the discharge member shaft and / or the central axis of the conveying passage extend parallel to each other and / or extend in the same cross-sectional plane of the metering device.

[0173] Preferably, the shaft, discharge component shaft and / or shaft body are arranged concentrically with the conveying channel. Therefore, the central axis of the shaft, discharge component shaft and / or shaft body is preferably the same as the central axis of the conveying channel.

[0174] Alternatively or supplementally, the metering device may be provided with at least one support unit by means of which the shaft and / or shaft body are end supported, wherein the support unit preferably has or is configured as at least one rolling bearing and / or sliding bearing.

[0175] The support unit enables reliable positioning of the shaft and / or shaft body relative to the conveying channel and the enclosure element. This allows for more reliable metering processes and prevents undesirable material discharge from the conveying channel.

[0176] Alternatively or additionally, the metering device may be specified to have at least one vertical discharge section, wherein the discharge opening leads into the vertical discharge section, and / or the movement path of the closing element preferably extends entirely within the vertical discharge section.

[0177] The discharged material can be safely and reliably supplied to the downstream process of the metering process via the vertical discharge section.

[0178] The central axis of the vertical unloading section can advantageously be perpendicular to the conveying direction and / or parallel to the gravity extension.

[0179] Alternatively or additionally, the metering device may have at least one fastening plate preferably configured as a flange, and preferably at least one cylinder of the support unit and / or motion mechanism is at least partially plugged through an opening in the fastening plate and / or fastened to the fastening plate.

[0180] Therefore, fastening plates can securely provide the components located therein.

[0181] Alternatively or supplementally, it may be specified that the positioning of the support unit and at least one cylinder relative to each other is determined or can be determined by a fastening plate.

[0182] Therefore, the closure can be used reliably.

[0183] Alternatively or supplementally, it may be specified that the component constructed to be detachable as a whole from the metering device has at least one cylinder of a motion mechanism, a sealing element, a support unit, and a fastening plate.

[0184] This modular construction allows for easy installation of components related to the closure at the metering device, and enables quick and safe replacement when needed. Consequently, even existing metering devices can be relatively easily fitted with the closure according to the invention. Furthermore, downtime of the metering device can be avoided or at least reduced during replacement.

[0185] The component may also advantageously include a piston disposed within at least one cylinder.

[0186] Alternatively or supplementally, the fastening plate may have elongated holes for securing the component to the metering device, particularly to the housing section of the vertical unloading section, and / or for precisely oriented the component relative to the shaft and / or shaft body and / or conveying channel in at least two dimensions.

[0187] Therefore, it is possible to orient the components of the assembly relative to other components of the metering device (especially shafts, shaft bodies, discharge components and / or conveying channels) in a simple but effective manner.

[0188] Alternatively or supplementally, it may be specified that at least some of the components of the assembly located within the vertical discharge section (in particular at least the support unit and / or the closing element) are inserted into or can be inserted into the vertical discharge section through an opening in the housing of the vertical discharge section, and a fastening plate is fastened or can be fastened to the housing section while at least partially covering the opening.

[0189] This allows for easy insertion and removal of components.

[0190] Alternatively or supplementally, it may be specified that the sealing element is constructed as an annular ring, such as a sealing ring, and in particular a radial axial sealing ring.

[0191] Thus, the shaft, discharge member, and / or shaft body can be particularly easily surrounded by the sealing element along its entire circumference.

[0192] Alternatively or supplementally, it may be specified that the sealing element has PTFE and / or silicone as the material.

[0193] These materials are particularly preferred because they are inexpensive to manufacture and provide a reliable seal.

[0194] Alternatively or additionally, it may be specified that at least one sealing member is provided at the closing element, especially at the retaining element, preferably at the end of the retaining element facing the discharge opening, the sealing member being able to contact the end of the conveying channel, especially the edge of the discharge opening, and / or at least when the closing element moves to the closed position, contact the edge of the conveying channel, especially the edge of the discharge opening.

[0195] The sealing component advantageously provides axial sealing isolation of the area between the delivery channel and the sealing element.

[0196] The sealing member enables the sealing isolation of the contact area between the conveying channel and the sealing element. Therefore, the conveying channel is advantageously also sealed and isolated from the environment in areas away from the shaft, the discharge member shaft and / or shaft body (where the sealing effect is preferably undertaken by the sealing element).

[0197] Preferably, the sealing member does not have radial sealing elements, and in particular, it does not have a cone.

[0198] In an advantageous embodiment, the retaining element, the sealing element, and the sealing member are constructed as a single unit, particularly of PTFE. This allows for very simple and reliable radial and axial sealing isolation.

[0199] Alternatively or supplementally, a sealing member may be provided at the end of the conveying channel, particularly at the edge of the discharge opening, which is capable of contacting the closing element, particularly the retaining element, and / or at least contacting the closing element, particularly the retaining element, when the closing element moves to the closed position.

[0200] The sealing component advantageously provides axial sealing isolation of the area between the delivery channel and the sealing element.

[0201] The sealing member enables the sealing isolation of the contact area between the conveying channel and the sealing element. Therefore, the conveying channel is advantageously also sealed and isolated from the environment in areas away from the shaft, the discharge member shaft and / or shaft body (where the sealing effect is preferably undertaken by the sealing element).

[0202] Preferably, the sealing member does not have radial sealing elements, and in particular, it does not have a cone.

[0203] Alternatively or supplementally, it may be specified that the selectively operable closure can achieve a sealing isolation of the conveying channel for bulk materials under a pressure difference between 0 mbar and 100 mbar. Preferably, this pressure difference refers to the pressure difference between the conveying channel and the environment.

[0204] Alternatively or supplementally, the metering device may be provided with at least one receiving unit for receiving bulk material to be metered and / or at least one conveying channel from which the bulk material may be transferred from the receiving unit to the conveying channel.

[0205] Thus, the bulk materials to be metered can be reliably stored and supplied to the conveyor channel during the metering process. For example, bulk materials can be transferred from the receiving unit to the conveyor channel via a connecting channel.

[0206] According to a second aspect of the invention, this objective is achieved by a component for use in a measuring device according to a first point of the first aspect of the invention and / or a second point of the first aspect of the invention, and / or adapted for use in a measuring device according to a first point of the first aspect of the invention and / or a second point of the first aspect of the invention.

[0207] The component has at least one fastening plate, and the component has

[0208] - At least one closing element for selectively closing the discharge opening of the conveying channel of the metering device, the metering device having a discharge member rotatably arranged within the conveying channel for conveying bulk material within the conveying channel, particularly along the conveying direction, to the discharge opening of the conveying channel.

[0209] - At least one cylinder of at least one motion mechanism, for at least indirectly moving the closing element along a motion path extending parallel to the central axis of the conveying channel, and

[0210] - At least one support unit for end support of the shaft and / or shaft body connected to or possessed by the discharge member.

[0211] It is supplied as a whole along with the fastening plate.

[0212] This component preferably corresponds to the component described with reference to the measuring device according to the first aspect of the invention (i.e., the first point of the first aspect of the invention and / or the second point of the first aspect of the invention).

[0213] All the advantages described with reference to the measuring device (and especially the components therein) according to the first aspect of the invention (i.e., the first point and / or the second point of the first aspect) also apply accordingly to the components according to the second aspect of the invention. Therefore, reference to the foregoing description is sufficient for this purpose.

[0214] Unless the context otherwise indicates, the features described with reference to the components of the measuring device according to the first aspect of the invention (i.e., the first point of the first aspect and / or the second point of the first aspect) may be provided individually or in any combination in the components according to the second aspect of the invention.

[0215] In particular, unless the context otherwise requires, the physical and functional design of the various components (especially the sealing element, motion mechanism, fastening plate, and support unit) of the assembly described in conjunction with the first aspect of the invention (i.e., the first point of the first aspect and / or the second point of the first aspect), as well as the structural and functional associations between the various components of the assembly and the measuring device (such as the relationship between the sealing element and the shaft, the discharge member, the discharge member shaft, and / or the shaft body), can be respectively or in any combination in the assembly of the second aspect of the invention.

[0216] According to a first point of the third aspect of the invention, this objective is achieved by a method for selectively operating the closure of a metering device for metering bulk materials, particularly a metering device according to the first point of the first aspect of the invention, the method comprising:

[0217] At least one closing element is moved from a running position to a closed position along at least one motion path, the motion path extending at least between at least one running position and at least one closed position.

[0218] In the closed position, the discharge opening of the conveying channel is at least partially closed by means of a sealing element. A rotatably arranged discharge component is provided inside the conveying channel to convey bulk materials along the conveying direction to the discharge opening of the conveying channel.

[0219] The discharge member has at least one shaft or is connected to the shaft, which is supported at the ends on the opposite side of the discharge opening in the conveying direction, and wherein the shaft extends through the closure element.

[0220] The sealing element preferably has at least one sealing element, and in particular the shaft and the sealing element interact with each other in a positional relationship along the movement path, and thereby at least part of the preload of the sealing element along the movement path is set in a positional relationship.

[0221] According to a second point of the third aspect of the invention, this objective is achieved by a method for selectively operating the closure of a metering device for metering bulk materials, particularly a metering device according to a second point of the first aspect of the invention, the method comprising:

[0222] Move at least one enclosing element from the operating position to the enclosed position.

[0223] In the closed position, the discharge opening of the conveying channel is at least partially closed by a sealing element. A rotatably arranged discharge member is provided within the conveying channel for conveying bulk material, particularly along the conveying direction, to the discharge opening of the conveying channel. The discharge member is supported at its ends.

[0224] The central axis of the discharge component can be defined, which extends through the closure element, and the movement path of the closure element extends along or parallel to the central axis.

[0225] All the advantages described with reference to the measuring device according to the first aspect of the invention (i.e., the first point of the first aspect and / or the second point of the first aspect) are also applicable to the method according to the third aspect of the invention (i.e., the first point of the third aspect and / or the second point of the third aspect). Therefore, reference to the foregoing description is sufficient for this purpose.

[0226] Unless the context otherwise requires, the features described with reference to the measuring device according to the first aspect of the invention (i.e., the first point of the first aspect and / or the second point of the first aspect) may be provided in this method individually or in any combination accordingly.

[0227] In particular, unless the context otherwise requires, the physical and functional design of the various components described in conjunction with the measuring device according to the first aspect of the invention (i.e., the first point of the first aspect and / or the second point of the first aspect), as well as the structural and functional relationships between the described various components, can be provided in this method individually or in any combination.

[0228] Alternatively or supplementally, it may be specified that during the period of movement of the closing element, the discharge component shaft and / or shaft does not rotate, or the discharge component shaft and / or shaft rotates at a speed lower than the rotation speed during the period when the closing element is in the operating position and / or when bulk material is discharged from the discharge opening through the metering device.

[0229] Therefore, wear on the sealing element can be reduced, especially when the interaction between the discharge component shaft and / or the shaft and the sealing element is stronger than the time the sealing element is in the operating position. Attached Figure Description

[0230] Other features and advantages of the invention will be presented in the following description, wherein preferred embodiments of the invention are illustrated with reference to the illustrative drawings.

[0231] in:

[0232] Figure 1a A schematic three-dimensional cross-sectional view of the measuring device according to a first aspect of the present invention, in a first configuration, is shown.

[0233] Figure 1b It shows Figure 1a A schematic three-dimensional cross-sectional view of the measuring device in the second configuration;

[0234] Figure 2 It shows Figure 1b A magnified view of the segment;

[0235] Figure 3a A schematic three-dimensional cross-sectional view of the measuring device according to the second point of the first aspect of the present invention is shown in a first embodiment under a first configuration;

[0236] Figure 3b It shows Figure 3a A schematic three-dimensional cross-sectional view of the measuring device in the second configuration;

[0237] Figure 3c It shows Figure 3a A magnified view of the segment;

[0238] Figure 3d It shows Figure 3b A magnified view of the segment;

[0239] Figure 3e It shows Figures 3a to 3d A schematic cross-sectional view of the components of the metering device in a variant design;

[0240] Figure 4a A schematic three-dimensional cross-sectional view of the measuring device according to the second point of the first aspect of the present invention is shown in a second embodiment under a first configuration;

[0241] Figure 4b It shows Figure 4a A schematic three-dimensional cross-sectional view of the measuring device in the second configuration;

[0242] Figure 4c It shows Figure 4b A magnified view of the segment;

[0243] Figure 4d It shows Figures 4a to 4c Modified embodiments of the metering device in the text;

[0244] Figure 5a A schematic three-dimensional cross-sectional view of the measuring device according to the second point of the first aspect of the present invention is shown in a third embodiment under a first configuration;

[0245] Figure 5b It shows Figure 5a A schematic three-dimensional cross-sectional view of the measuring device in the second configuration;

[0246] Figure 6a A schematic three-dimensional cross-sectional view of the measuring device according to the second point of the first aspect of the present invention is shown in the first configuration of the fourth embodiment;

[0247] Figure 6b It shows Figure 6a A schematic three-dimensional cross-sectional view of the measuring device in the second configuration;

[0248] Figure 7 A schematic three-dimensional cross-sectional view of a component according to a second aspect of the invention is shown;

[0249] Figure 8 A flowchart of the method according to the first point of the third aspect of the invention is shown; and

[0250] Figure 9 A flowchart of the method of the second point of the third aspect of the present invention is shown. Detailed Implementation

[0251] Figure 1a A schematic three-dimensional cross-sectional view of a metering device 1 for metering bulk materials according to a first point of the first aspect of the present invention is shown in a first configuration. Figure 1bA schematic three-dimensional cross-sectional view of the measuring device 1 in its second configuration is shown.

[0252] The metering device 1 has a discharge component 5 rotatably arranged within the conveying channel 3 of the metering device 1. Figure 1a and Figure 1b The conveying channel 3 and the discharge member 5 are cut off on the right side. Using the discharge member 5, bulk material can be conveyed in the conveying channel 3 along the conveying direction R to at least one discharge opening 7 of the conveying channel 3. The discharge opening 7 leads to the vertical discharge section 9 of the metering device 1. Thus, the bulk material can be metered (e.g., using differential metering technology when the metering device 1 is a differential weighing scale) and discharged from the conveying channel 3, and supplied to downstream processes via the vertical discharge section 9.

[0253] The discharge member 5 has a shaft 11, which is currently configured as a screw. The shaft is end-supported by a support unit 13 on the opposite side (jenseits) of the discharge opening 7 in the conveying direction R. The helical portion of the screw is currently arranged on a section of the shaft 11. However, in an embodiment, the discharge member itself does not have a shaft, but is connected to a shaft.

[0254] By supporting the end of shaft 11, the discharge member 5 can be reliably and accurately positioned relative to the conveying channel 3 (especially by aligning the central axes of the two parts 3 and 5). In this way, even during rotation of the discharge member 5 within the conveying channel 3, the gap 15 between the discharge member 5 and the conveying channel 3 remains constant along the entire extension of the conveying channel 3. This improves the metering process. Conversely, in the case of cantilever support of the discharge member, the free end of the discharge member may come into contact with the inner wall area of ​​the conveying channel 3 due to vibration. This may affect the metering process and also damage the metering device 1 or cause material wear or loss.

[0255] Shaft 11 has an outer diameter that decreases along the conveying direction R. Specifically, shaft 11 has a first section 17, in which the outer diameter is a first outer diameter D1. Furthermore, shaft 11 has a second section 19 that follows the first section 17 along the conveying direction R, in which the outer diameter is a second outer diameter D2, which is smaller than the first outer diameter D1. The first section 17 and the second section 19 are connected to each other via a transition region 21.

[0256] The metering device 1 also has a closing element 23, which has a retaining element 25 (constructed as annular in a cross-sectional plane perpendicular to the conveying direction). A sealing element 29, in the form of a radial axial sealing ring, is arranged at the inner periphery 27 of the retaining element 25. The closing element 23 (especially the part retaining element 25 and the sealing element 29) extends circumferentially around the shaft 11, or rather, the shaft 11 extends through the closing element 23 (especially through the retaining element 25 and the sealing element 29).

[0257] The closing element 23 can extend along the conveying direction R and... Figure 1a and Figure 1b The motion path shown by the dashed line moves between the running position and the closed position.

[0258] exist Figure 1a In the first configuration shown, the closing element 23 (i.e., in) Figure 1a The material moves to the operating position (facing left). When the closing element 23 moves to the operating position, the discharge opening 7 is released by the closing element 23, and the bulk material can be discharged from the discharge opening 7 in the manner described above. Figure 1b In the second configuration shown, the closing element 23 (i.e., in) Figure 1b The material discharge opening 7 is closed when the closing element 23 moves to the closed position (towards the right).

[0259] Due to the varying outer diameter of shaft 11 along the motion path, a position-dependent interaction occurs between shaft 11 and sealing element 29 along the motion path.

[0260] When the enclosing element 23 moves to the operating position ( Figure 1a The sealing element 29 interacts with the second section 19 of the shaft 11. More specifically, the sealing element 29 therefore contacts the second section 19 of the shaft. In an embodiment, the sealing element 29 may not contact the shaft 11 when the sealing element 23 is moved to the operating position.

[0261] When the closing element 23 moves to the closed position ( Figure 1b The sealing element 29 interacts with the first section 17 of the shaft 11. More specifically, the sealing element 29 thus comes into contact with the first section 17 of the shaft 11.

[0262] Here, the preload of the sealing element 29 varies depending on which section of the shaft 11 contacts the sealing element 29. Thus, the preload of the sealing element 29 is positionally related along the movement path.

[0263] Therefore, when the closed element 23 moves to Figure 1aWhen the operating position is shown, the preload of the sealing element 29 is less than when the closing element 23 moves to... Figure 1b The preload of the sealing element 29 in the closed position is shown. Due to the smaller preload of the sealing element 29 in the operating position, wear of the sealing element 29 can be reduced during the rotational movement of the shaft 11 (i.e., during the discharge of material from the conveying channel 3 through the discharge opening 7). Due to the larger preload of the sealing element 29 in the closed position, material discharge from the discharge opening 7 in the area between the retaining element 25 and the shaft 11 (i.e., at the location where the sealing element 29 is arranged) can be reliably prevented (such as material "follow-flow" during material discharge pauses).

[0264] In the closed position, the remaining area of ​​the discharge opening 7 is closed by the retaining element 25. Since the inner diameter of the retaining element 25 is smaller than the inner diameter of the conveying channel 3, the end side 31 of the retaining element 25 facing the discharge opening 7 (or the part arranged there) can serve as the closing surface. On the other hand, since the inner diameter of the retaining element 25 is selected to be larger than the maximum outer diameter of the shaft 11 along the movement path, the closing element 23 can be displaced along the movement path without "getting stuck" on the shaft 11.

[0265] A sealing member 33 is provided at the end 31 of the retaining element 25 facing the discharge opening 7. When the closing element 23 moves to the closed position, the sealing member 33 contacts the edge of the discharge opening. In an embodiment, the sealing member 33 may also be alternatively or additionally provided at the end of the conveying channel 3 facing the closing element 23.

[0266] Figure 2 It shows Figure 1b Enlarged view of the section highlighted in the dashed box in the accompanying drawing. It can be seen particularly clearly that the sealing element 29 is bent and thus more pre-tightened due to the interaction between the first section 17 of the shaft 11 and the sealing element 29.

[0267] As previously stated, since the shaft 11 extends through the closure element 23, it is advantageous to specify that the end-supported shaft 11 is combined with the selectively operable closure of the discharge opening 7 in the metering device 1.

[0268] In an advantageous embodiment, the retaining element 25, the radially acting sealing element 29, and the axially acting sealing member 33 can be constructed as a single unit, especially of PTFE.

[0269] The metering device 1 also has a receiving unit (not shown in the figures) for receiving bulk materials to be metered. The bulk materials can be transferred from this receiving unit to the conveying channel 3.

[0270] Measuring device 1 (see) Figure 1a and Figure 1b It also has a motion mechanism 35. The motion mechanism allows the closing element 23 to move along a motion path. The motion mechanism 35 consists of two cylinders 37. Each cylinder 37 contains a movable piston 39, which is connected to the closing element 23. By synchronously displacing the pistons 39 within the cylinders 37, the closing element 23 can be displaced along the motion path. Therefore, each cylinder 37 also provides linear guidance for the closing element 23.

[0271] The central axes of the two cylinders 37, the central axis of the shaft 11, and the central axis of the conveying channel 3 extend parallel to each other and are located at... Figure 1a and Figure 1b Within the drawing plane.

[0272] The two cylinders 37 of the support unit 13 and the motion mechanism 35 are respectively inserted through the openings in the flange-shaped fastening plate 41 of the metering device 1 and fastened to the fastening plate 41. Thus, the positioning of the support unit 13 and the two cylinders 37 relative to each other is determined by the fastening plate 41.

[0273] The two cylinders 37 (including pistons 39), the sealing element 23, the support unit 13, and the fastening plate 41 of the motion mechanism 35 are included in the assembly 43, which is configured to be detachable from the metering device 1 as a whole.

[0274] Figure 3a A schematic three-dimensional cross-sectional view of a metering device 1' for metering bulk materials according to a second point of the first aspect of the present invention is shown in a first embodiment under a first configuration. Figure 3b A schematic three-dimensional cross-sectional view of the measuring device 1' in the second configuration is shown.

[0275] Measuring device 1' is constructed similarly to measuring device 1. Therefore, in the case of measuring device 1', the same features as those in measuring device 1 are marked with the same reference numerals but with single-digit apostrophes.

[0276] The metering device 1' has a discharge component 5' rotatably arranged within the conveying channel 3' of the metering device 1 (in Figure 3a and Figure 3b The conveying channel 3 and the discharge component 5' are cut off on the right side. Bulk material can be conveyed along the conveying direction R within the conveying channel 3' to at least one discharge opening 7' of the conveying channel 3' by means of the discharge component 5'. The discharge opening 7' leads into the vertical discharge section 9' of the metering device 1'. Thus, the bulk material can be metered (e.g., by means of differential metering technology when the metering device 1' is a differential weighing scale) and discharged from the conveying channel 3', and supplied to downstream processes via the vertical discharge section 9'.

[0277] For example, the discharge member 5', constructed as an end support of a screw, has a shaft serving as a discharge member shaft 47'. The discharge member 5' is connected to a shaft 49', which is fixed to the metering device 1' on the opposite side of the discharge opening 7' in the conveying direction R. This advantageously provides end support for the discharge member shaft 47' (and consequently, the discharge member 5'). The discharge member shaft 47' has a recess 51' in which the end section of the shaft 49' is received. Here, the discharge member shaft 47' is rotatable relative to the shaft 49'. This is advantageously supported by a sliding bushing provided within the recess 51', in which the end section of the shaft 49' is received. The shaft 49' is fixed to the metering device 1' so that it can neither be displaced nor rotated. For example, the support unit 13' can properly clamp the shaft 49' for this purpose.

[0278] For the discharge component 5', a central axis M can be defined. It should be understood that the central axis M does not refer to a physical feature of the discharge component 5', but rather to an axis defined by mathematical geometry. The defined central axis M extends infinitely in two directions.

[0279] By supporting the end of the discharge member 5', it is possible to reliably and accurately position the discharge member 5' relative to the conveying channel 3' (especially to make the central axes of the two parts 3' and 5' coincide). In this way, even during the rotation of the discharge member 5' within the conveying channel 3', the gap 15' between the discharge member 5' and the conveying channel 3' remains constant along the entire extension of the conveying channel 3'. This improves the metering process. Conversely, in the case of cantilever support of the discharge member, the free end of the discharge member may come into contact with the inner wall area of ​​the conveying channel 3' due to vibration. This may affect the metering process and also damage the metering device 1' or cause material wear or loss.

[0280] Shaft 49' has an outer diameter smaller than that of discharge component shaft 47'.

[0281] The metering device 1' also has a closing element 23', which has a retaining element 25' (constructed as an annular shape in a cross-sectional plane perpendicular to the conveying direction). A sealing element 29' is arranged at the inner periphery 27' of the retaining element 25', which is in the form of a radial axial sealing ring. The closing element 23' (especially the part retaining element 25' and the sealing element 29') extends circumferentially around a central axis M, and the central axis M extends through the closing element 23' (especially through the retaining element 25' and the sealing element 29').

[0282] The closing element 23' can move between a running position and a closed position along a motion path. The motion path of the closing element 23' extends along or parallel to the central axis M. For example, the motion path may segmentally coincide with the central axis M (such as when the motion path describes the extension of the center of gravity of the closing element).

[0283] exist Figure 3a In the first configuration shown, the closing element 23' (i.e., in) Figure 3a The material moves to the operating position (facing left). When the closing element 23' moves to the operating position, the discharge opening 7' is released by the closing element 23', and the bulk material can be discharged from the discharge opening 7' as described above. Figure 3b In the second configuration shown, the closing element 23' (i.e., in) Figure 3b The material discharge opening 7' is closed when the closing element 23' moves to the closed position (to the right).

[0284] Due to the different outer diameters of the shaft 49' and the discharge member shaft 47' along the movement path, a position-dependent interaction occurs between the sealing element 29' and the shaft 49' or the discharge member shaft 47' along the movement path.

[0285] When the enclosing element 23' moves to the operating position ( Figure 3a The sealing element 29' does not interact with the shaft 49'. More specifically, the sealing element 29' therefore does not contact the shaft 49'. In an embodiment, when the closing element 23' moves to the operating position, the sealing element 29' also contacts the shaft 49', but the sealing element 29' advantageously bends less compared to the interaction with the discharge member shaft 47'.

[0286] When the closing element 23' moves to the closed position ( Figure 3b ), the sealing element 29' interacts with the discharge member shaft 47'.

[0287] Here, (non) contact between the sealing element 29' and the shaft 49' or between the sealing element 29' and the discharge member shaft 47' preferably results in different preloads of the sealing element 29'. Thus, the preload of the sealing element 29' is advantageously position-dependent along the movement path.

[0288] Therefore, when the closed element 23' moves to Figure 3a When the operating position is shown, the sealing element 29' has a smaller value than when the closing element 23' moves to... Figure 3bThe preload in the closed position is shown (e.g., zero). Due to the small preload (or, for example, no preload) of the sealing element 29' in the operating position, wear during a portion of the movement path of the sealing element 29' can be reduced in this configuration. Due to the large preload of the sealing element 29' in the closed position, material can be reliably prevented from being discharged from the discharge opening 7' in the area between the retaining element 25' and the discharge member shaft 47' (i.e., at the location where the sealing element 29' is arranged) (such as "follow-flow" of material during material discharge pauses).

[0289] In the closed position, the remaining area of ​​the discharge opening 7' is closed by the retaining element 25'. Advantageously, since the inner diameter of the retaining element 25' is smaller than the inner diameter of the conveying channel 3', the end side 31' (or the part arranged there) of the retaining element 25' facing the discharge opening 7' can serve as a closing surface. On the other hand, advantageously, since the inner diameter of the retaining element 25' is chosen to be larger than the corresponding maximum outer diameter along the movement path of the shaft 49' and the discharge member shaft 47', the closing element 23' can be displaced along the movement path without "getting stuck" at one location.

[0290] A sealing member 33' is provided at the end 31' of the retaining element 25' facing the discharge opening 7'. When the closing element 23' moves to the closed position, the sealing member 33' contacts the edge of the discharge opening. In an embodiment, the sealing member 33' may also be alternatively or additionally provided at the end of the conveying channel 3' facing the closing element 23'.

[0291] As previously stated, since the central axis M extends through the closure element 23', and preferably the shaft 49' also extends through the closure element 23' at least in sections, it is advantageous to specify that the end-supported discharge member 5' is combined with the selectively operable closure of the discharge opening 7' in the metering device 1'.

[0292] In an advantageous embodiment, the retaining element 25', the radially acting sealing element 29', and the axially acting sealing member 33' are also constructed as a single unit, particularly of PTFE.

[0293] The metering device 1' also has a receiving unit (not shown in the figures) for receiving bulk materials to be metered. The bulk materials can be transferred from this receiving unit to the conveying channel 3'.

[0294] Measuring device 1' (see) Figure 3a and Figure 3bIt also has a motion mechanism 35'. The motion mechanism allows the closing element 23' to move along a motion path. The motion mechanism 35' consists of two cylinders 37'. Each cylinder 37' contains a piston 39' that moves within it, and these pistons are respectively connected to the closing element 23'. By synchronously displacing the pistons 39' within the cylinders 37', the closing element 23' can be displaced along the motion path. Therefore, each cylinder 37' also simultaneously provides linear guidance for the closing element 23'.

[0295] The central axes of the two cylinders 37', the central axis of the shaft 49', the central axis M of the discharge component 5', and the central axis of the conveying channel 3' extend parallel to each other and are located at... Figure 3a and Figure 3b Within the drawing plane.

[0296] The two cylinders 37' of the support unit 13' and the motion mechanism 35' are respectively inserted through the openings in the flange-shaped fastening plate 41' of the metering device 1' and fastened to the fastening plate 41'. Thus, the positioning of the support unit 13' and the two cylinders 37' relative to each other is determined by the fastening plate 41'.

[0297] The two cylinders 37' (including piston 39'), the sealing element 23', the support unit 13', and the fastening plate 41' of the motion mechanism 35' may be included in an assembly configured to be detachable as a whole from the metering device 1'. For this purpose, refer to the description of the assembly 43 of the metering device 1, which applies accordingly here.

[0298] Figure 3c It shows Figure 3a The enlarged view of the section highlighted by the dashed box in the attached figure shows, in particular, how the sealing element 29' does not contact the shaft 49' in the operating position. Figure 3d It shows Figure 3b Enlarged view of the section highlighted in the dashed box in the attached figure. The sealing element 29' can be seen particularly clearly. In the closed position, the sealing element 29' is in contact with the discharge member shaft 47' and is therefore (more) pre-tightened than in the running position, thereby supporting the sealing isolation of the discharge opening 7'.

[0299] Figure 3e A schematic cross-sectional view of a portion of the measuring device 1' in a variant is shown.

[0300] In an embodiment of the metering device 1', the connection between the shaft 49' and the discharge member 5' can also be achieved by the shaft 49' (rather than the discharge member shaft 47' described above) having a recess 51' (preferably together with a sliding bushing). Therefore, a portion of the discharge member 5', such as the pin 55' of the discharge member 5' (or the end section of the discharge member shaft 47'), can be received within the recess 51', as... Figure 3e As shown.

[0301] In the outer transition region between the shaft 49' and the discharge member shaft 47', the outer diameter of the shaft 49' is advantageously smaller than the outer diameter of the discharge member shaft 47'.

[0302] Then when the closing element 23' moves to the running position ( Figure 3e (The left side of the sealing element 23'), the sealing element 29' does not interact with the shaft 49'. More specifically, the sealing element 29' therefore does not contact the shaft 49'. When the sealing element 23' moves to the closed position ( Figure 3e (The right side of the sealing element 23'), the sealing element 29' interacts with the discharge member shaft 47'. It should be noted that... Figure 3e Only the upper part of the closing element 23' is shown schematically.

[0303] Therefore, the interaction between the sealing element 29' and the shaft 49' or the discharge member shaft 47' is as described above. Figures 3a to 3d The situation is exactly the same as that of the metering device 1' in the embodiment. Thus, the pre-tightening of the sealing element 29' is advantageously also position-dependent along the movement path in this embodiment.

[0304] Alternatively, the outer diameter can also remain constant along the conveying direction R, at least along the movement path, without abrupt changes. This can be achieved by selecting the same outer diameter for the corresponding shaft 49' and the discharge member shaft 47'. Therefore, the preload of the sealing element 29' in both positions can be the same.

[0305] Figure 4a A schematic three-dimensional cross-sectional view of a metering device 1 for metering bulk materials according to a second point of the first aspect of the present invention is shown in a second embodiment under a first configuration. Figure 4b A schematic three-dimensional cross-sectional view of the measuring device 1" in the second configuration is shown.

[0306] Measuring device 1" is constructed similarly to measuring device 1'. Therefore, in the case of measuring device 1", the same features as those in measuring device 1' are marked with the same reference numerals but with double apostrophes. The following only describes the differences between the two measuring devices 1' and 1". For the rest, refer to the description of measuring device 1' above, which applies accordingly here.

[0307] In the metering device 1", the shaft 49" has a reduced outer diameter in the end section region. This end section is received in the recess 51" of the discharge member shaft 47" with a reduced outer diameter. This achieves that, in the outer transition region between the shaft 49" and the discharge member shaft 47", the outer diameter remains constant along the conveying direction R without abrupt changes. Therefore, the sealing element 29" advantageously contacts the shaft 49" in both the closed and running positions, and has preload in both positions, thereby achieving radial sealing isolation at least in the closed position. For example, the preload in both positions can be the same.

[0308] Figure 4c It shows Figure 4b The enlarged view of the section highlighted by the dashed box in the attached figure shows the sealing element 29" in particular clearly. In the closed position, the sealing element 29" is in contact with the shaft 49" to support the sealing isolation of the discharge opening 7".

[0309] Figure 4d It shows the relationship with Figure 4c The same segment, but involving a variant implementation of the metering device 1". In the variant metering device 1", the shaft 49" has a larger outer diameter in the transition region between the shaft 49" and the discharge member 5" than the region adjacent to this transition region along the conveying direction R. In other words, the shaft 49" has a first outer diameter in the end section region, a second outer diameter in the transition region region, and a third outer diameter on its opposite side, wherein the second outer diameter is larger than the first and third outer diameters, and preferably the first outer diameter is smaller than the third outer diameter. Figure 4d In the closed position of the shown sealing element 23", the sealing element 29" contacts the section of the shaft 49" (with the second outer diameter) in the transition region. In the operating position, the sealing element 29" can be located at the height of the section of the shaft 49" with the third outer diameter, and advantageously does not contact that section of the shaft 49". Therefore, position-related pre-tightening of the sealing element 29" can be achieved in a manner similar to that of the metering device 1 ( Figure 1a , Figure 1b The situation is very similar.

[0310] In this embodiment, the recess 51" may alternatively be provided in the shaft 49", as described above. Figure 3e As described, and a portion of the discharge member shaft 47" is accommodated therein. In this regard, refer to the foregoing description, which applies accordingly here.

[0311] Figure 5a A schematic three-dimensional cross-sectional view of a metering device 1"' for metering bulk materials according to the second point of the first aspect of the present invention is shown in a third embodiment under a first configuration. Figure 5b A schematic three-dimensional cross-sectional view of the measuring device 1"' in the second configuration is shown.

[0312] In the case of measuring device 1"', the same features as measuring device 1" are marked with the same reference numerals but with apostrophes.

[0313] The metering device 1"' has a discharge component 5"' rotatably arranged within the conveying channel 3"' of the metering device 1"'. Figure 5a and Figure 5b The conveying channel 3"' and the discharge component 5"' are cut off on the right side. Bulk material can be conveyed along the conveying direction R within the conveying channel 3"' to at least one discharge opening 7"' of the conveying channel 3"' by means of the discharge component 5"'. The discharge opening 7"' leads into the vertical discharge section 9"' of the metering device 1"'. Thus, the bulk material can be metered (e.g., by means of differential metering technology when the metering device 1"' is a differential weighing scale) and discharged from the conveying channel 3"', and supplied to the downstream process via the vertical discharge section 9"'.

[0314] For example, the discharge member 5"', constructed as an end support of a screw, has a shaft serving as a discharge member shaft 47"'. The discharge member 5"' is connected to a shaft 49"', which is fixed to the metering device 1"' on the opposite side of the discharge opening 7"' in the conveying direction R. In this way, end support of the discharge member shaft 47"' (and consequently the discharge member 5"') can be advantageously achieved. The discharge member shaft 47"' has a recess 51"' for this purpose, in which the end section of the shaft 49"' is received. Here, the discharge member shaft 47"' can rotate relative to the shaft 49"'. This is advantageously supported by the fact that a sliding bushing is provided in the recess 51"', and the end section of the shaft 49"' is received in the sliding bushing. The shaft 49"' is fixed at the metering device 1"' such that the shaft 49"' can neither be displaced nor rotated. For example, the support unit 13"' can properly clamp the shaft 49"' for this purpose.

[0315] For the discharge component 5"', a central axis M can be defined. It should be understood that the central axis M does not refer to the physical characteristics of the discharge component 5"', but rather to an axis defined by mathematical geometry. The defined central axis M extends infinitely in two directions.

[0316] By supporting the end of the discharge member 5"', the discharge member 5"' can be reliably and accurately positioned relative to the conveying channel 3"' (especially aligning the central axes of the two parts 3"' and 5"'). In this way, even during the rotation of the discharge member 5"' within the conveying channel 3"', the gap 15"' between the discharge member 5"' and the conveying channel 3"' remains constant along the entire extension of the conveying channel 3"'. This improves the metering process. Conversely, with cantilever support for the discharge member, the free end of the discharge member may come into contact with the inner wall area of ​​the conveying channel 3"' due to vibration. This may affect the metering process and also damage the metering device 1"' or cause material wear or loss.

[0317] The metering device 1"' also has a closing element 23"', which has a retaining element 25"' (also referred to as a base) that is annular in a cross-sectional plane perpendicular to the conveying direction. The closing element 23"' is connected to the discharge member 5"' (especially the end of the discharge member 5"'), for example, the closing element 23"' may be constructed integrally with the discharge member 5"'. The closing element 23"' (especially the retaining element 25"') extends circumferentially about a central axis M, and the central axis M extends through the closing element 23"' (especially the retaining element 25"').

[0318] The closing element 23"' can move between a running position and a closed position along a motion path. The motion path of the closing element 23"' extends along or parallel to the central axis M. For example, the motion path may segmentally coincide with the central axis M (such as when the motion path describes the extension of the center of gravity of the closing element). For this purpose, the discharge member 5"' is movably arranged along the central axis M.

[0319] Thus, the discharge component 5"' can reciprocate, causing the closing element 23"' to move between the running position and the closed position along the motion path. The outward motion from the running position to the closed position is opposite to the conveying direction R, and the return motion from the closed position to the running position is in the same direction as the conveying direction R.

[0320] Therefore, when the closing element 23"' moves to the operating position, the length of the discharge component 5"' extending from the conveying channel 3"' along the conveying direction R is greater than its extension length when it moves to the closing position.

[0321] exist Figure 5a In the first configuration shown, the closing element 23"' moves to the operating position, that is... Figure 5a The center faces left. When the closing element 23"' moves to the operating position, the discharge opening 7"' is released by the closing element 23"', and the bulk material can be discharged from the discharge opening 7"' as described above. Figure 5bIn the second configuration shown, the closing element 23"' moves to the closed position, that is, in Figure 5b The center faces to the right. When the closing element 23"' moves to the closed position, the discharge opening 7"' is closed by the closing element 23"'.

[0322] During the movement of the closing element 23"' from the running position to the closed position, the portion of the end section of the shaft 49"' received in the recess 51"' of the discharge member shaft 47"' is reduced. During the movement of the closing element 23"' from the running position to the closed position along the travel path, when the closing element 23"' is in the running position ( Figure 5a The end section of the shaft 49"' is maximally received in the recess 51"' of the discharge member shaft 47"', and when the closing element 23"' is in the closed position ( Figure 5b The end section of the shaft 49"' is minimally received in the recess 51"' of the discharge member shaft 47"'. During the transition of the closing element 23"' from the running position to the closed position along the motion path, a variable portion of the end section of the shaft 49"' is thus introduced into the recess 51"' of the discharge member shaft 47"'.

[0323] A sealing member 33"' is provided at the end 31"' of the retaining element 25"' facing the discharge opening 7"'. When the closing element 23"' moves to the closed position, the sealing member 33"' contacts the edge of the discharge opening 7"'. In an embodiment, the sealing member 33"' may also be alternatively or additionally arranged at the end of the conveying channel 3"' facing the closing element 23"'.

[0324] In the closed position, the closing element 23"' at least partially closes the discharge opening 7"' along the conveying direction R by the retaining element 25"'. This configuration reliably prevents material from being discharged from the discharge opening 7"' (such as "follow-flow" of material during material discharge pauses). Since the retaining element 25"' extends directly outward in the circumferential radial direction from the discharge member shaft 47"', no additional radial sealing element is required.

[0325] As previously stated, since the central axis M extends through the closure element 23"', and preferably the shaft 49"' also extends through the closure element 23"' at least in sections, it is advantageous to specify that the end-supported discharge member 5"' is combined with the selectively operable closure of the discharge opening 7"' in the metering device 1"'.

[0326] In an advantageous embodiment, the retaining element 25"' and the axially acting sealing member 33"' are constructed as an integral unit, especially of PTFE.

[0327] The metering device 1"' also has a receiving unit (not shown in the figures) for receiving bulk materials to be metered. The bulk materials can be transferred from the receiving unit to the conveying channel 3"'.

[0328] Figure 6a A schematic three-dimensional cross-sectional view of a metering device 1"" for metering bulk materials according to the second point of the first aspect of the present invention is shown in the first configuration of the fourth embodiment. Figure 6b A schematic three-dimensional cross-sectional view of the measuring device 1"" in the second configuration is shown.

[0329] In the case of measuring device 1", the same features as measuring device 1" and measuring device 1 are marked with the same reference numerals but with apostrophes.

[0330] Metering device 1"" has a discharge component 5"" which is rotatably arranged within the conveying channel 3"" of metering device 1"". Figure 6a and Figure 6b The conveying channel 3"" and the discharge component 5"" are cut off on the right side. Bulk material can be conveyed along the conveying direction R within the conveying channel 3"" to at least one discharge opening 7"" of the conveying channel 3"" by means of the discharge component 5"". The discharge opening 7"" leads to the vertical discharge section 9"" of the metering device 1""". Thus, the bulk material can be metered (e.g., by means of differential metering technology when the metering device 1"" is a differential weighing scale) and discharged from the conveying channel 3"" and supplied to the downstream process via the vertical discharge section 9"".

[0331] For example, the discharge member 5"" constructed as an end support of a screw has a shaft serving as a discharge member shaft 47"". The discharge member 5"" is connected to a shaft 49"" which is fixed to the metering device 1"" on the opposite side of the discharge opening 7"" along the conveying direction R. In this way, end support of the discharge member shaft 47"" (and consequently the discharge member 5"") can be advantageously achieved. The discharge member shaft 47"" has a recess 51"" for this purpose, in which the end section of the shaft 49"" is received. Here, the discharge member shaft 47"" can rotate relative to the shaft 49"". This is advantageously supported by a sliding bushing provided in the recess 51"" in which the end section of the shaft 49"" is received. The shaft 49"" is fixed to the metering device 1"" in such a way that the degree of freedom of movement of the shaft 49"" is restricted, especially rotation is not allowed.

[0332] For the discharge component 5"", a central axis M can be defined. It should be understood that the central axis M does not refer to the physical characteristics of the discharge component 5"", but rather to an axis defined by mathematical geometry. The defined central axis extends infinitely in two directions.

[0333] By supporting the end of the discharge member 5"", the discharge member 5"" can be reliably and accurately positioned relative to the conveying channel 3"" (especially aligning the central axes of the two parts 3"" and 5"). In this way, even during the rotation of the discharge member 5"" within the conveying channel 3"", the gap 15"" between the discharge member 5"" and the conveying channel 3"" remains constant along the entire extension of the conveying channel 3""". ​​This improves the metering process. Conversely, in the case of cantilever support of the discharge member, the free end of the discharge member may come into contact with the inner wall area of ​​the conveying channel 3"" due to vibration. This may affect the metering process and also damage the metering device 1"" or cause material wear or loss.

[0334] Shaft 49"" has multiple partial shafts 53"" which are interconnected to transmit force along shaft 49".

[0335] Part 1 Shaft 53"" ( Figure 6a and Figure 6b The end section of the right-hand portion of the shaft 53"" forms the end section of the shaft 49"" which is received in the recess 51"" of the discharge member shaft 47"" . The second portion of the shaft 53"" ( Figure 6a and Figure 6b The left-hand portion of the shaft 53"" is rigidly connected to the first portion of the shaft 53"" and is positioned behind the first portion of the shaft 53"" along the conveying direction R.

[0336] The metering device 1"" also has a closing element 23"" which has a retaining element 25"" (also referred to as a base) (constructed as a plate in a cross-sectional plane perpendicular to the conveying direction). The closing element 23"" is rigidly connected to the first part of the shaft 53"" in particular, the retaining element 25"" is constructed integrally with the first part of the shaft 53"" in particular. Thus, the closing element 23"" is also rigidly connected to the shaft 49"" in particular. The closing element 23"" (especially the retaining element 25"" in particular) extends circumferentially around the central axis M, and the central axis M extends through the closing element 23"" (especially through the retaining element 25"" in particular).

[0337] The closing element 23"" can move between the running position and the closed position along the motion path via the axis 53". The motion path of the closing element 23"" extends along or parallel to the central axis M.

[0338] For example, the motion path may segmentally coincide with the central axis M (such as when the motion path describes the extension of the center of gravity of a closed element).

[0339] exist Figure 6a In the first configuration shown, the closing element 23"" moves to the operating position, that is Figure 6aThe center faces left. When the closing element 23"" moves to the operating position, the discharge opening 7"" is released by the closing element 23"" and the bulk material can be discharged from the discharge opening 7"" as described above. Figure 6b In the second configuration shown, the closing element 23"" moves to the closed position, that is Figure 6b The center faces to the right. When the closing element 23"" moves to the closed position, the discharge opening 7"" is closed by the closing element 23"".

[0340] During the movement of the closing element 23"" from the running position to the closed position, the portion of the end section of the shaft 49"" that is received in the recess 51"" of the discharge member shaft 47"" (currently the end section of the first portion of the shaft 53"") increases.

[0341] During the transition of the closing element 23"" from the running position to the closed position along the motion path, when the closing element 23"" is in the running position ( Figure 6a The end section of shaft 49" is minimally received in the recess 51" of discharge member shaft 47" when the closing element 23" is in the closed position. Figure 6b The end section of shaft 49"" is received to the maximum extent in the recess 51"" of discharge member shaft 47"". During the movement of closing element 23"" from the running position to the closed position along the motion path, a variable portion of the end section of shaft 49"" is thus introduced into the recess 51"" of discharge member shaft 47"". This is because the portion of the end section of shaft 49"" received in the recess 51"" of discharge member shaft 47"" increases during the movement of closing element 23"" from the running position to the closed position.

[0342] At the retaining element 25", a sealing member 33"" is provided at the end side 31"" of the retaining element 25"" facing the discharge opening 7"". When the closing element 23"" moves to the closed position, the sealing member 33"" contacts the edge of the discharge opening 7"". In an embodiment, the sealing member 33"" may also be alternatively or additionally provided at the end side of the conveying channel 3"" facing the closing element 23"".

[0343] The closing element 23"" at least partially closes the discharge opening 7"" along the conveying direction R by means of the retaining element 25"". Thus, with this configuration, material can be reliably prevented from being discharged from the discharge opening 7"" (such as "follow-flow" of material during material discharge pauses). Since the retaining element 25"" extends directly outward from the circumferential radial direction of the shaft 49"", a radial sealing element can be advantageously omitted here.

[0344] As previously stated, the central axis M extends through the closure element 23", and preferably the shaft 49"" also extends at least sectionally through the closure element 23", so that it can be advantageously specified that the end-supported discharge member 5"" is combined with the selectively operable closure of the discharge opening 7"" in the metering device 1".

[0345] In an advantageous embodiment, the retaining element 25"" and the axially acting sealing member 33"" are also constructed as an integral unit, especially of PTFE.

[0346] The metering device 1"" also has a receiving unit (not shown in the figures) for receiving bulk materials to be metered. The bulk materials can be transferred from the receiving unit to the conveying channel 3"".

[0347] Measuring device 1"" (see Figure 6a and Figure 6b It also has a motion mechanism 35". The motion mechanism allows the closing element 23"" to move along a motion path. The component of the motion mechanism 35"" is a cylinder 37". A piston 39"" is disposed in the cylinder and can move therein. This piston constitutes the second part of the shaft 53"" and is connected to the first part of the shaft 53"" and further connected to the closing element 23"" as previously described. By displacing the piston 39"" within the cylinder 37"" the closing element 23"" can be displaced along the motion path. Therefore, the cylinder 37"" also provides linear guidance for the closing element 23"". Therefore, the cylinder 37"" can also serve to some extent as a support unit 13"" for the shaft 49"".

[0348] The central axis of cylinder 37", the central axis of shaft 49", and the central axis of conveying channel 3"" extend parallel to each other and are located at... Figure 6a and Figure 6b Within the drawing plane.

[0349] The cylinder 37 of the motion mechanism 35" is inserted through the opening in the flange-shaped fastening plate 41" of the metering device 1" and fastened to the fastening plate 41". Thus, the positioning of the support unit 13" and the cylinder 37" relative to each other is determined by the fastening plate 41".

[0350] The cylinder 37"" (including piston 39"") of the motion mechanism 35"" together with the sealing element 23"" the support unit 13"" and the fastening plate 41"" can be included in an assembly that is configured to be detachable as a whole from the metering device 1". In this regard, reference can be made to the description of the assembly 43 of the metering device 1, which applies accordingly here.

[0351] Figure 7 A schematic perspective cross-sectional view of component 43 is shown. Component 43 may be a component according to the second aspect of the present invention.

[0352] Through the advantageous connection between the components of assembly 43, the closing element 23 can be reliably and easily inserted into the vertical discharge section 9 through the opening in the housing of the vertical discharge section 9. In the installed state, the fastening plate 41 covers the opening. The fastening plate 41 can be easily and reliably fastened to the housing through the elongated hole 45 provided in the fastening plate 41. In addition, the elongated hole 45 also enables the precise orientation of assembly 43 relative to the shaft 11 and the conveying channel 3 in two dimensions. Figure 1a and Figure 1b In this context, the "front and back" direction is perpendicular to the drawing plane of the attached figure, and the "up and down" direction is within the drawing plane of the attached figure.

[0353] Figure 8 A flowchart 100 of a method according to the first point of the third aspect of the present invention is shown.

[0354] This method allows for the at least partial closure of the discharge opening of a conveying channel in a metering device (such as metering device 1 described above), wherein a rotatably arranged discharge member is provided in the conveying channel for conveying the bulk material along the conveying direction to the discharge opening of the conveying channel. Here, the discharge member has at least one shaft or is connected to such shaft, which is supported at its end on the opposite side of the discharge opening in the conveying direction, and its shaft extends through a closing element.

[0355] In 101, at least one sealing element having a sealing element is moved from an operating position to a closed position along at least one movement path, the movement path extending at least between at least one operating position and at least one closed position.

[0356] In 103, the shaft and the sealing element interact with each other positionally along the movement path, and at least partially therefrom, the preload of at least part of the sealing element along the movement path is positionally set. This interaction can be achieved, for example, by using different shaft diameters.

[0357] In 105, the discharge opening is closed in the closed position by means of a closing element.

[0358] Figure 9 A flowchart 200 of the method according to the second point of the third aspect of the present invention is shown.

[0359] This method allows for the partial closure of the discharge opening of a conveying channel in a metering device (such as metering device 1', 1", 1"' or 1"") used for metering bulk materials. A rotatably arranged discharge member is provided within this conveying channel to convey the bulk material, particularly along the conveying direction, to the discharge opening of the conveying channel. Here, the discharge member is end-supported.

[0360] In step 201, at least one closing element is moved from an operating position to a closed position. Here, a central axis of the discharge member may be defined, extending through the closing element, and the movement path of the closing element extends along or parallel to the central axis.

[0361] In 203, in the closed position, the discharge opening is closed by means of a closing element.

[0362] The following describes examples of preferred embodiments of the present invention.

[0363] Example 1. A metering device for metering bulk materials, the metering device having a selectively operable closure, the metering device having:

[0364] - A discharge member rotatably arranged within a conveying channel for conveying bulk material in the conveying direction to a discharge opening of the conveying channel, wherein the discharge member has a shaft or is connected to such a shaft, the shaft being end-supported on the opposite side of the discharge opening in the conveying direction, and

[0365] - A closing element that can move along a motion path between a running position and a closed position, used to at least partially close the discharge opening.

[0366] The shaft extends through the closed element.

[0367] Example 2. The metering device according to Example 1, wherein the closing element has at least one sealing element that is in contact with or can form contact with the shaft at least when the closing element is moved to the closed position.

[0368] Example 3. According to the metering device of Example 2, the preload of at least a portion of the sealing element along the movement path is position-dependent due to the position-dependent interaction between the shaft and the sealing element along the movement path.

[0369] Example 4. A metering device according to any one of Examples 2 to 3, wherein at least when the closing element moves to the closed position, the sealing element sealably abuts against at least one circumferential section of the shaft.

[0370] Example 5. A metering device according to any of the preceding examples, wherein the motion path extends along the axis and / or extends parallel to the conveying direction.

[0371] Example 6. A metering device according to any of the preceding examples, wherein the enclosing element extends at least partially about the circumference.

[0372] Example 7. A metering device according to any of the preceding examples, wherein the shaft has an outer diameter that decreases at least segmentally along the conveying direction.

[0373] Example 8. A metering device according to any one of Examples 2 to 7, wherein the shaft has an increased outer diameter in at least one section, and wherein a sealing element interacts with that section of the shaft when the closing element moves to a closed position.

[0374] Example 9. A measuring device according to any of the preceding examples, wherein the shaft has:

[0375] - At least one first segment, in which the outer diameter of the shaft is a first outer diameter or has a value within a first value range, and

[0376] - At least one second section, preferably following the first section along the conveying direction, wherein the outer diameter of the shaft in the second section is a second outer diameter smaller than the first outer diameter, or a value within a second value range, wherein the upper limit of the second value range is smaller than the lower limit of the first value range.

[0377] Preferably, the first segment and the second segment are connected to each other through a transition region.

[0378] Example 10. The metering device according to Example 9, wherein when the sealing element moves to the closed position, the sealing element interacts with the first section of the shaft, in particular, at least partially contacts the first section of the shaft.

[0379] Example 11. A metering device according to any one of Examples 9 to 10, wherein when the sealing element is moved to the operating position, the sealing element (a) does not interact with the first section of the shaft, in particular does not contact the first section of the shaft, (b) interacts with the second section of the shaft, in particular at least partially contacts the second section of the shaft, and / or (c) does not contact the shaft.

[0380] Example 12. A metering device according to any of the preceding examples, wherein the closing element has at least one retaining element that is at least partially and / or configured as annular in at least one cross-sectional plane, and

[0381] (i) where the shaft extends through the retaining element

[0382] and / or

[0383] (ii) where

[0384] (a) The sealing element is arranged, particularly at least partially, on the inner circumference of the retaining element, and / or

[0385] (b) The retaining element has a specific inner diameter that is greater than the maximum outer diameter of the shaft along the path of motion.

[0386] Example 13. A metering device according to any of the preceding examples, wherein the enclosing element can move along a motion path by operating at least one motion mechanism.

[0387] Example 14. The metering device according to Example 13, wherein the motion mechanism has at least one cylinder, preferably at least two cylinders, each cylinder having a piston that is movable and connected to a closing element, wherein preferably, at least one of the one or more cylinders, preferably all of them, is configured as a pneumatic cylinder or a hydraulic cylinder.

[0388] Example 15. A metering device according to any of the preceding examples, wherein the metering device has at least one support unit by means of which the shaft is end supported, wherein the support unit preferably has or is configured as at least one rolling bearing and / or at least one sliding bearing.

[0389] Example 16. A metering device according to any one of Examples 2 to 15, wherein the sealing element is configured as an annular ring, such as a sealing ring, and in particular as a radial shaft sealing ring.

[0390] Example 17: A component for use in any of the preceding examples of a measuring device and / or adapted for use in any of the preceding examples of a measuring device.

[0391] The component has at least one fastening plate, and the component has

[0392] - At least one closing element for selectively closing the discharge opening of the conveying channel of the metering device, the metering device having a discharge member rotatably arranged in the conveying channel for conveying bulk material in the conveying channel along the conveying direction to the discharge opening of the conveying channel.

[0393] - At least one cylinder of at least one motion mechanism, for at least indirectly moving the closing element along a motion path extending parallel to the central axis of the conveying channel, and

[0394] - At least one support unit for end support of a shaft connected to or possessed by the discharge member.

[0395] It can be supplied as a whole along with the fastening plate.

[0396] Example 18: A method for selectively operating the closure of a metering device for metering bulk materials, particularly a metering device of any one of Examples 1 to 16, the method comprising:

[0397] At least one closing element is moved from a running position to a closed position along at least one motion path, the motion path extending at least between at least one running position and at least one closed position.

[0398] In the closed position, the discharge opening of the conveying channel is at least partially closed by means of a sealing element. A rotatably arranged discharge component is provided in the conveying channel to convey bulk materials along the conveying direction to the discharge opening of the conveying channel.

[0399] The discharge member has at least one shaft or is connected to the shaft, which is supported at the end on the opposite side of the discharge opening in the conveying direction, and the shaft extends through the closure element.

[0400] The features disclosed in the foregoing description, drawings, and claims may play a key role in various embodiments of the present invention, either individually or in any combination.

[0401] Explanation of reference numerals in the attached figures

[0402] 1, 1', 1", 1"', 1"'' Metering device

[0403] 3, 3', 3", 3"', 3"'' conveying channels

[0404] 5, 5', 5", 5"', 5"'' Discharge components

[0405] 7, 7', 7", 7"', 7"'' discharge opening

[0406] 9, 9', 9", 9"', 9"'' Vertical unloading section

[0407] 11-axis

[0408] 13, 13', 13", 13"', 13"'' support unit

[0409] 15, 15', 15", 15"', 15"'' gap

[0410] Section 1 (D1) of Axis 17

[0411] The second section (D2) of axis 19

[0412] 21 Transition Zones

[0413] 23, 23', 23", 23"', 23"" Enclosed elements

[0414] 25", 25'", 25"'", 25"" Holding elements

[0415] 27", 27'", 27" retaining element inner periphery

[0416] 29", 29', 29" sealing elements / lips with radial sealing function

[0417] 31, 31', 31", 31"', 31"" end side

[0418] 33, 33', 33", 33"', 33"" sealing components with axial sealing function

[0419] 35, 35', 35", 35"" sports structure

[0420] 37, 37', 37", 37"" cylinders

[0421] 39, 39', 39", 39"" piston

[0422] 41, 41', 41", 41"" Fastening plates

[0423] 43 components

[0424] 45 long holes

[0425] 47', 47", 47"', 47"" Exit component shaft

[0426] 49', 49", 49"', 49"" shafts

[0427] 51', 51", 51''', 51"" recess

[0428] 53"" Partial shaft

[0429] 55' ejector pin

[0430] 100 Flowchart

[0431] 101 moves the closing element from the running position to the closed position along the motion path.

[0432] 103 Position-related interaction between the shaft and the sealing element along the motion path

[0433] 105. The discharge opening is closed by means of a sealing element.

[0434] 200 Flowchart

[0435] 201 The closing element moves from the running position to the closed position.

[0436] 203. The discharge opening is closed by means of a sealing element.

[0437] D1 First outer diameter

[0438] D2 Second Outer Diameter

[0439] R conveying direction

[0440] The central axis of the M discharge component

Claims

1. A metering device for metering bulk materials, the metering device having a selectively operable closure, the metering device having - At least one discharge member rotatably arranged within the conveying channel for conveying the bulk material within the conveying channel to at least one discharge opening of the conveying channel. The discharge member is supported at the end, and - At least one closing element movable between at least one operating position and at least one closed position, for at least partially closing the discharge opening. The discharge member is defined by a central axis that extends through the closure element, and the movement path of the closure element extends along or parallel to the central axis.

2. The metering device according to claim 1, wherein the discharge member is configured to convey the bulk material in the conveying channel along the conveying direction to at least one of the discharge openings of the conveying channel, and / or the discharge member is connected to a shaft fixed at the metering device to the opposite side of the discharge opening in the conveying direction.

3. The metering device according to claim 2, wherein the shaft is fixed and / or sealed and isolated from the environment of the metering device.

4. The metering device according to any one of the preceding claims, wherein the discharge member has a shaft, and the discharge member shaft has a recess, and an end section of the shaft is received or can be received within the recess. Preferably, the discharge member shaft is rotatable relative to the shaft body, and / or a sliding bushing is provided in the recess of the discharge member shaft, and the end section of the shaft body is received within the sliding bushing.

5. The metering device according to any one of the preceding claims, wherein the discharge member is reciprocating to move the closing element along the movement path between the running position and the closing position, wherein preferably the outgoing movement is opposite to the conveying direction and the return movement is along the conveying direction.

6. The metering device according to claim 5, wherein when the closure element is in the operating position, the discharge member further extends out of the conveying channel along the conveying direction compared to when the closure element is in the closed position.

7. The measuring device according to any one of claims 2 to 6, wherein the shaft has a plurality of partial shafts interconnected to transmit force along the shaft. Preferably, the end section of the first portion of the shaft is configured such that the end section of the shaft is received in the recess of the discharge member shaft, and in particular (i) the second portion of the shaft is rigidly connected to the first portion of the shaft and is disposed behind the first portion of the shaft along the conveying direction, and / or (ii) the closure element is integrally constructed with the first portion of the shaft or the second portion of the shaft.

8. The metering device according to any one of claims 2 to 7, wherein the metering device is configured such that, during the transfer of the closing element from the operating position to the closing position along the movement path, a variable portion of the end section of the shaft is introduced into the recess of the discharge member shaft, the variable portion being, in particular, an increasing or decreasing portion.

9. The metering device according to any one of claims 2 to 8, wherein when the closure element is in the operating position and the closed position, the shaft and the discharge member have the same position relative to each other along the conveying direction.

10. The metering device according to claim 1 or 2, wherein the discharge member has at least one shaft or is connected to at least one shaft, the shaft being supported, in particular, at the ends, on the opposite side of the discharge opening along the conveying direction.

11. The measuring device according to any one of claims 2 to 10, wherein the shaft and / or the shaft body extends through the closure element.

12. The metering device according to any one of the preceding claims, wherein the closing element (i) is movable relative to the discharge member, the shaft of the discharge member, the shaft and / or the shaft body, (ii) is rigidly connected to the discharge member, especially to the end of the discharge member, and / or (iii) is rigidly connected to the shaft body and / or is integrally constructed with the shaft body.

13. The metering device according to any one of the preceding claims, wherein the closing element has a plate-shaped, disc-shaped, or annular base, wherein in the closed position, the base preferably at least partially closes the discharge opening along the conveying direction, and / or wherein the closing element has a sealing element, wherein in the closed position, the sealing element is sealingly abutting against the edge of the discharge opening.

14. The metering device according to any one of the preceding claims, wherein the sealing element, in particular the base, is fastened to and / or integrally constructed with the discharge member, the discharge member shaft, the shaft and / or the shaft body, and preferably extends radially outward from there along the entire circumference.

15. The metering device according to any one of the preceding claims, wherein at least one segment of the motion path extends on the opposite side of the discharge opening in the conveying direction.

16. The metering device of any of the preceding claims, wherein, In particular, at least when the closure element is in the operating position, the closure element extends at least partially circumferentially around the central axis of the discharge member, the discharge member axis, the axis and / or the shaft body.

17. A component for use in a measuring device according to any one of the preceding claims, and / or adapted for use in a measuring device according to any one of the preceding claims. The component has at least one fastening plate, and the component has - At least one closing element for selectively closing the discharge opening of the conveying channel of the metering device, the metering device having a discharge member rotatably arranged within the conveying channel for conveying bulk material along the conveying direction to the discharge opening of the conveying channel. - At least one cylinder of at least one motion mechanism, for at least indirectly moving the closing element along a motion path extending parallel to the central axis of the conveying channel, and - At least one support unit for end support of the shaft and / or shaft body connected to or possessed by the discharge member. It can be provided as a whole together with the fastening plate.

18. A method for selectively operating the closure of a metering device for metering bulk materials, wherein the metering device is particularly a metering device according to any one of claims 1 to 16, the method comprising: Move at least one enclosing element from the operating position to the enclosed position. In the closed position, the discharge opening of the conveying channel is at least partially closed by means of the closing element. A rotatably arranged discharge member is provided in the conveying channel for conveying the bulk material to the discharge opening within the conveying channel. The discharge member is end-supported. The discharge member is defined by a central axis that extends through the closure element, and the movement path of the closure element extends along or parallel to the central axis.

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