WO2023174886A1 - Procédé de mesure gravimétrique du niveau de remplissage d'une machine de préparation de filature, et machine de préparation de filature - Google Patents

Procédé de mesure gravimétrique du niveau de remplissage d'une machine de préparation de filature, et machine de préparation de filature Download PDF

Info

Publication number
WO2023174886A1
WO2023174886A1 PCT/EP2023/056372 EP2023056372W WO2023174886A1 WO 2023174886 A1 WO2023174886 A1 WO 2023174886A1 EP 2023056372 W EP2023056372 W EP 2023056372W WO 2023174886 A1 WO2023174886 A1 WO 2023174886A1
Authority
WO
WIPO (PCT)
Prior art keywords
filling
preparation machine
spinning preparation
shafts
control unit
Prior art date
Application number
PCT/EP2023/056372
Other languages
German (de)
English (en)
Inventor
Andreas MUYRES
Original Assignee
Trützschler Group SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Trützschler Group SE filed Critical Trützschler Group SE
Priority to CN202380014018.4A priority Critical patent/CN118284726A/zh
Publication of WO2023174886A1 publication Critical patent/WO2023174886A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/02—Hoppers; Delivery shoots
    • D01G23/04—Hoppers; Delivery shoots with means for controlling the feed
    • D01G23/045—Hoppers; Delivery shoots with means for controlling the feed by successive weighing; Weighing hoppers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G13/00—Mixing, e.g. blending, fibres; Mixing non-fibrous materials with fibres
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
    • D01G31/006—On-line measurement and recording of process and product parameters

Definitions

  • the present invention relates to a method for gravimetric level measurement of a spinning preparation machine that can be filled with fiber flakes, wherein the spinning preparation machine has a plurality of filling shafts arranged next to one another, a feed channel arranged above the filling shafts, which is connected on the input side to a central fiber flake inlet and has a bottom opening on the output side for each filling shaft, one below the filling shafts arranged extraction device, which is connected on the input side to the filling shafts and on the output side to a central fiber flock outlet, and has a weighing device signal-connected to the control unit.
  • the present invention further relates to such a spinning preparation machine.
  • a spinning preparation machine for processing fiber flakes is known, the machine frame of which is mounted on a foundation at at least four support points. At least one load cell is provided between the machine frame and the foundation for measuring a fill level of a storage of the spinning preparation machine that can be filled with fiber flakes.
  • the device has a frame for supporting the fiber delivery device.
  • Several load cells are attached between the frame and a conveyor housing of the fiber metering device.
  • the filling weight of the fiber flakes can be precisely determined with knowledge of their empty weight. However, knowing the filling weight is not always enough to prevent individual filling shafts from running empty in spinning preparation machines with several filling shafts, since the fiber flakes can be distributed very differently between the individual filling shafts. As soon as one of the filling shafts runs empty, this affects the production of the spinning preparation machine.
  • the object of the present invention is to provide a method for gravimetric level measurement of a spinning preparation machine, with which more uniform production can be achieved. Furthermore, it is an object of the present invention to provide a spinning preparation machine which enables more uniform production.
  • the object is achieved by a method of the type mentioned at the outset in that the spinning preparation machine has a plurality of closure elements arranged in the feed channel, which can be adjusted by means of actuators, and a control unit which is configured to control the actuators for filling the filling shafts with the fiber flakes in such a way that due to of the positioning positions of the closure elements at the same time only one of the bottom openings is connected to the central fiber flock inlet, and that the method comprises the following steps:
  • control unit controls the actuators and therefore knows the positioning positions of the closure elements. This means that when calculating the filling levels, the control unit can take into account which of the filling shafts was connected to the fiber flock inlet for how long in the defined time interval. The control unit also receives information about how the weight has changed in the time interval via the weighing device. Accordingly, the control unit can proportionally assign the incoming amount of fiber flakes, or the incoming weight, to the individual filling shafts, taking into account the information from the positioning positions of the closure elements. In this way, the control unit can calculate the fill level of the individual filling shaft.
  • loading takes place so that at least one of the filling shafts is filled with the fiber flakes.
  • the extraction device stands still during the filling process, so that no fiber flakes are removed from the filling shafts.
  • the emptying process there is no loading and the extraction device removes the fiber flakes from the filling shafts.
  • loading takes place and the extraction device removes fiber flakes from the filling shafts.
  • the weighing device measures a weight from which a total weight can be calculated.
  • the total weight consists of an empty weight and a filled weight. Because the weighing device is arranged in the flow of force between the filling shafts and the stationary floor, the total weight does not have to correspond to the entire mass of the spinning preparation machine.
  • the change in the weight force corresponds to the difference between the weight force measured at a starting point of the time interval and the weight force measured at an end point of the time interval.
  • the change in the weight force therefore has the same physical unit as the weight force.
  • the weighing device and/or the control unit can preferably convert the force specification into kilograms or indicate it.
  • the change in the filling weight can correspond to the difference between the filling weight at the starting point of the time interval and the filling weight at the end point of the time interval.
  • the change in the filling weight therefore has the same physical unit as the filling weight, namely kilograms.
  • the filling weight corresponds to the difference between the weight measured by the weighing device and the empty or tare weight, which can be stored in the control unit. The latter occurs when the filling shafts are empty or there are no fiber flakes in the spinning preparation machine.
  • the empty weight can be measured using the weighing device or stored as a predetermined value in the control unit.
  • the mass of the fiber flakes is therefore used to calculate the fill level.
  • this offers the following advantages: direct comparability with other information from tests or measuring systems in the spinning mill (e.g. bale weight set up in the bale show for the bale opener); Independence from material compression in the filling shafts due to compressed air or filling weight; Independence from changing material properties, for example packing density; Independence from material distribution in the filling shaft.
  • the filling levels can be in kilograms.
  • the fill level of the respective filling shaft can indicate the amount of fiber flakes in the respective filling shaft in kilograms. This is advantageous because it allows a minimum value, i.e.
  • a minimum fill level, and/or a maximum value, i.e. a maximum fill level, to be specified in a simple manner is particularly advantageous if the spinning preparation machine is to process different materials one after the other, for example initially fiber flakes made of cotton and, after a material change, fiber flakes made of mixed fibers, which also include recycled fibers, for example.
  • the values can be stored in the control unit or can be set or changed by an operator of the spinning preparation machine.
  • the aforementioned method steps 1) - 3) are repeated during the filling and/or emptying process.
  • process steps 1) - 3) are constantly repeated.
  • the time interval can be, for example, 1 second, 2 seconds, 3 seconds, 4 seconds, 5 seconds or even more than 5 seconds or even less than 1 second.
  • Preferably the time interval is in a range between 1 second and 10 seconds.
  • the extraction device has a pair of feed rollers for each filling shaft, with the control unit taking into account a feed roller speed of the feed roller pairs for calculating the fill levels.
  • the incoming weight can be determined by forming the difference between the change in the filling weight and the outgoing weight. This increases the accuracy of the calculated level values.
  • the condition of the feed rollers is also recorded by the control unit. This can provide information as to whether the feed rollers are rotating or standing still. As the feed rollers rotate, the hoppers are emptied. If the feed rollers are at a standstill, no fiber flakes are drawn out of the filling shafts.
  • the feed rollers are preferably coupled to a common drive. Two of the feed rollers can be arranged in each filling shaft.
  • An individual drive can also be provided for each filling shaft, which drives the feed rollers of the respective filling shaft.
  • the rollers of the feed roller pairs are driven at the same speed.
  • the fiber flakes are removed from all filling shafts at the same time, which ensures better mixing of the fiber flakes in the mixing channel.
  • the drive train through which all pairs of feed rollers are driven is structurally simpler to implement. In principle, it is also possible for each pair of feed rollers to be driven individually.
  • control unit calculates a production of the spinning preparation machine depending on the feed roller speed from the change in the weight force, which is measured by the weighing device in a time window in which the filling shafts are not fed.
  • Production indicates the weight of the amount of fiber flakes per time that are output from the spinning preparation machine. Production is usually expressed in kilograms per hour.
  • Tests have shown that production remains constant at filling levels at which the individual filling shafts are filled between approximately 30 percent and 100 percent of the maximum filling level.
  • the filling shafts can thus be filled in a targeted manner. This can prevent the individual filling shafts from running empty or the filling level from falling below the specified minimum value, which can be, for example, 40 percent of the maximum filling level.
  • the total fill level of the spinning preparation machine can be used, for example to calculate maintenance windows together with an initial mass flow of the card, Calculate changeover times between lines, offer added value/security for the customer.
  • the total filling level corresponds to the filling weight. This is particularly advantageous if the spinning preparation machine is designed as a mixer, in particular a shaft mixer.
  • Further information obtained from the spinning preparation machine or available to the control unit, which can be used in the further optimization of the level measurement, can, for example, be pressure values from pressure measurements.
  • the limit state which means 100 percent filling of the respective filling shaft, can be determined via the measured differential pressure between loading and suction and can be checked by light barrier signals from light barriers, light sensors, etc. arranged in the filling shafts.
  • a further solution to the above-mentioned problem consists in a spinning preparation machine for processing fiber flakes, the spinning preparation machine being set up or set up on a stationary floor and several filling shafts arranged next to one another, a feed channel arranged above the filling shafts, which is connected to a central fiber flake inlet on the input side and on the output side
  • Each filling shaft has a bottom opening, several closure elements arranged in the loading channel, which can be adjusted by means of actuators, a control unit which is configured to control the actuators for filling the filling shafts with the fiber flakes in such a way that only one of the closure elements is always activated at the same time due to the positioning positions of the closure elements
  • Bottom openings are connected to the central fiber flock inlet, and a extraction device arranged below the filling shafts, which is connected on the input side to the filling shafts and on the output side to a central fiber flock outlet.
  • the spinning preparation machine is configured to carry out the method described above and has the weighing device which is signal-connected to the control unit and which is arranged in the flow of force between the filling shafts and the stationary floor.
  • the spinning preparation machine according to the invention results in the same advantages as those described in connection with the method according to the invention, so that abbreviated reference is made here to the above description. It goes without saying that all of the above-mentioned embodiments of the method can be transferred to the spinning preparation machine and vice versa.
  • the closure elements can be designed as, in particular, pivotable flaps, rotary slides, etc., which can be arranged in the feed channel.
  • each closure element can be transferred to at least two of the positioning positions.
  • the respective closure element blocks the respective closure element assigned bottom opening in the loading channel, so that the filling shaft adjoining the assigned bottom opening cannot be filled.
  • the respective closure element releases the bottom opening assigned to the respective closure element and enables the connected filling shaft to be filled.
  • the feed channel is blocked by the closure element, which is in the open position, downstream of the now released bottom opening. Due to this arrangement of the closure members, the last bottom opening in the loading channel in the loading direction does not require a closure member.
  • (n-1) closure members are provided for (n) bottom openings.
  • only one of the bottom openings can be connected to the central fiber flock inlet at the same time.
  • filling several filling shafts at the same time is not possible.
  • the spinning preparation machine can, for example, be a fiber mixer designed as a shaft mixer. This can have several filling shafts arranged next to one another or one behind the other in a loading direction.
  • the fiber flakes can be filled into the individual filling shafts via the feed channel running above the filling shafts.
  • the fiber flakes can be transported pneumatically, for example by means of one or more fans connected to the feed channel.
  • the closure element for example a flap, in particular a rotary slide, can be arranged in the feed channel for each filling shaft, the closure elements being able to be opened and closed via the control unit.
  • each closure element can interact with the respective actuator or actuator, which can be coupled to the control unit.
  • the spinning preparation machine can have the extraction device made of rollers on the undersides of the filling shafts in order to be able to empty the filling shafts. All filling shafts can be emptied at the same time.
  • the take-off device can comprise the feed rollers and downstream opening rollers in a manner known per se.
  • a suction system that operates, for example, with a supply of fresh air can be connected in order to transport the mixed fiber flakes to the next processing machine, in particular another spinning preparation machine.
  • the spinning preparation machine has at least three and preferably at least four support points for setting up on a stationary floor.
  • the spinning preparation machine has a substructure and a machine frame, the machine frame being supported relative to the stationary ground by means of the substructure.
  • the substructure can in particular have height-adjustable support feet.
  • the filling shafts can be attached to the machine frame.
  • the mass should, according to the invention, be determined by means of a gravimetric measurement by the weighing device, which preferably comprises several weighing cells. Due to the design of the spinning preparation machine, it may be possible to measure the entire spinning preparation machine. When designed as a shaft mixer, a shaft-by-shaft measurement is basically possible, but a measurement of the entire spinning preparation machine with calculation of the individual shaft fillings or fill levels is preferably provided.
  • the weighing cells can be designed, for example, as shear bar weighing cells.
  • the base body of such a weighing cell is designed as a spring element and is made of a metal which deforms under the influence of force and returns to its original state when the force is withdrawn. This defined deformation can be registered using a strain gauge attached to the base body and converted into an electrical signal.
  • the weighing cells can also include strain gauges, which can be attached directly to supporting supports of the substructure of the spinning preparation machine. Filling or emptying the filling shafts creates a mechanical load on the substructure, which creates material deformation, for example in the support feet, and can be detected by the weighing cells.
  • the spinning preparation machine has at least four of the support points for setting up on a stationary floor, the weighing device having a plurality of weighing cells which are attached to only a subset of the support points, the support points equipped with the weighing cells lying on an imaginary connecting line which is parallel to one The main axis of the spinning preparation machine is aligned.
  • the weighing cells can be arranged between the machine frame and the stationary floor.
  • the spinning preparation machine can have a decoupling device with at least four support points for setting up on a stationary floor, the machine frame and the decoupling device being structurally separated from one another, and the weighing cells being arranged between the decoupling device and the machine frame.
  • pipes for feeding and suction such as a fiber flock inlet and/or a fiber flock outlet
  • pipes for feeding and suction can be installed via which the Spinning preparation machine can be connected to upstream or downstream spinning preparation machines, can be decoupled.
  • This decoupling can take place, for example, through seals, flexible pieces of hose and the like.
  • a maintenance platform of the spinning preparation system which can be attached stationary to the spinning preparation machine, can also be decoupled in order to be able to exclude additional loads and vibrations when walking on the maintenance platform on the weighing device and force shunts.
  • Figure 1 is a longitudinal sectional view of a spinning preparation machine according to a first embodiment of the present invention
  • Figure 2 shows a detail II circled in Figure 1 in an enlarged view
  • Figure 3 shows a top view of the spinning preparation machine with a weighing system according to one embodiment
  • Figure 4 shows a top view of the spinning preparation machine with the weighing system according to a further embodiment
  • Figure 5 shows a flow chart for a method for gravimetric level measurement of the spinning preparation machine
  • Figure 6 is a longitudinal sectional view of a spinning preparation machine according to a second embodiment of the present invention.
  • FIG. 1 shows a spinning preparation machine 1 for processing fiber flakes 2 according to a first embodiment, which is designed as a shaft mixer and can be integrated in a manner known per se into a blowroom line of a spinning mill.
  • a longitudinal direction X, a transverse direction Y and a vertical direction Z are shown in FIG.
  • Terms such as “below”, “below”, “above” or “above” represent spatial information in relation to the vertical direction Z.
  • the spinning preparation machine 1 can be on a stationary floor 3 be set up, which lies in a horizontal plane spanned by the longitudinal direction X and the transverse direction Y.
  • the spinning preparation machine 1 has a flake storage 4, which is divided into several, here as an example, six filling shafts 5 (5.1, 5.2, 5.3, 5.4, 5.5, 5.6) arranged next to one another or one behind the other in a loading direction A.
  • the loading or transport direction of the fiber air stream is indicated in Figure 1 by the arrow A.
  • the filling shafts 5 are spatially separated from one another by perforated partitions 33.
  • the filling shafts 5 there is a loading device with a loading channel 6 and closure members 11 (11.1, 11.2, 11.3, 11.4, 11.5) arranged in the loading channel 6.
  • the filling shafts 5 are connected to the feed channel 6 running above the filling shafts 5, which has a bottom opening 7 (7.1, 7.2, 7.3, 7.4, 7.5, 7.6) for each filling shaft 5 for filling the filling shafts 5 with the fiber flakes 2.
  • An inlet 8 of the feed channel 6 is connected in a flow-conducting manner to a central fiber flock inlet 9, which is tubular and can in turn be connected on the input side to an upstream spinning preparation machine (not shown).
  • the fiber flakes 2 are transported pneumatically through the fiber flake inlet 9 by means of a fan 10 through the inlet 8 into the feed channel 6.
  • a circulating air flap 41 is arranged in the loading channel 6, which in its open position releases a flow-conducting connection between the inlet 8 and a circulating air channel 40.
  • the recirculating air flap 41 In the open position, the recirculating air flap 41 is pivoted into the feed channel 6 and blocks it downstream of the recirculating air flap 41.
  • the recirculating air flap 41 In Figure 1, the recirculating air flap 41 is shown in its closed position, in which the recirculating air flap 41 blocks the recirculating air channel 40 and opens the feed channel 6.
  • the recirculation flap 41 can be moved from the open position to the closed position and vice versa by means of an actuator.
  • the circulating air flap 41 When material is required, the circulating air flap 41 is in its closed position in order to enable the filling shafts 5 to be filled with the fiber flakes 2. If there is no material requirement, the circulating air flap 41 is moved to its open position, in which the transport air, which then does not transport any fiber flakes, is guided past the filling shafts 5 via the circulating air duct 40.
  • the positioning positions of the closure members 11 arranged in the loading channel 6 can be adjusted by means of actuating drives 36.
  • the actuators 36 can be pneumatic actuators, although alternatives such as electro-mechanical or hydraulic actuators are also possible.
  • the spinning preparation machine 1 has a control unit 37, which is configured to control the actuating drives 36 for the targeted filling of the filling shafts 5 with the fiber flakes 2 in such a way that, based on the positioning positions of the closure members 11 At the same time only one of the bottom openings 7 is connected to the central fiber flock inlet 9. For the, here, six filling shafts 5, only five closure members 11 are required due to the arrangement of the closure members 11.
  • control unit 37 is configured to control the actuator of the recirculating air flap 41 in order to move the recirculating air flap 41 into its closed position when material is required so that the fiber flakes 2 can flow through the inlet 8 to the respectively released bottom opening 7.
  • Each of the closure elements 11 can be moved into two positioning positions by means of the associated actuator 36, namely into its open position and into its closed position, as will be described in detail below.
  • the first closure member 11.1 in the loading direction A is in its open position, so that the fiber flakes 2 flowing into the loading channel 6 through the inlet 8 flow into the first filling shaft 5.1 through the first bottom opening 7.1. In its open position, the first closure member 11.1 is pivoted into the feed channel 6 in such a way that the feed channel 6 is blocked by the first closure member 11.1 downstream of the first bottom opening 7.1. This means that the fiber flakes 2 can only be transported into the first filling shaft 5.1.
  • the first closure member 11.1 is moved into its closed position, in which the first closure member 11.1 blocks the first bottom opening 7.1 and releases the feed channel 6 downstream of the first bottom opening 7.1.
  • the second closure member 11.2 is then transferred to its open position, in which the fiber flakes 2 flowing into the feed channel 6 through the inlet 8 flow through the second bottom opening 7.2 into the second filling shaft 5.2 and the feed channel 6 downstream of the second bottom opening 7.2 now flows through the second closure member 11.2 is blocked.
  • the other filling shafts 5.3, 5.4, 5.5 are filled in an analogous manner.
  • a withdrawal device 34 which has a metering device 12 for each filling shaft 5 in order to be able to empty the respective filling shaft 5 in a controlled manner.
  • the respective metering device 12 has a pair of feed rollers 35 with two feed rollers 13, 14 and can further comprise an opening roller 15 arranged below the pair of feed rollers 35. All feed rollers 13, 14 can be driven to rotate via a common drive and preferably rotate at the same input roller speed. In particular, the fiber flakes 2 are removed from the filling shafts 5 simultaneously via the extraction device 34.
  • a suction system operating, for example, with a fresh air supply L can be connected below the extraction device 34 in order to be able to transport the mixed fiber flakes 2 to the next processing machine, in particular another spinning preparation machine (not shown) in the blowroom line.
  • a mixing channel 16 can be connected below the metering devices 12, which extends in the longitudinal direction To be able to transport the blowroom line.
  • the flake outlet 18 can be supported on the stationary floor 3 via a pipe holder 32.
  • the spinning preparation machine 1 has a machine frame 19, to which the flake storage 4 with the filling shafts 5, the feed channel 6 arranged thereon and the withdrawal device 34 as well as the mixing channel 16 are attached. Furthermore, a machine housing 20 can be attached to the machine frame 19.
  • the machine frame 19 is supported on the stationary floor 3 via several, here as an example, four support points 24. In order to be able to align the machine frame 19 relative to the floor 3, a particularly height-adjustable support foot 25 is provided at each of the support points 24.
  • the spinning preparation machine 1 has a weighing device 26 which is signal-connected to the control unit 37 in order to be able to calculate the filling weight of fiber flakes 2 via changes in the measured weight during operation of the spinning preparation machine 1.
  • the weighing device 26 has several weighing cells 27.
  • the weighing cells 27 can be arranged on all or at least a subset of the support points 24 between the machine frame 19 and the stationary floor 3.
  • the supports allow horizontal displacement, for example through damping elements 28.
  • the weighing cells 27 can be arranged directly in the machine frame 19, as can be seen in particular in FIG. This allows them to be integrated into the existing machine structure.
  • the weighing cells 27 can be arranged between the machine frame 19 and the support feet 25, which are particularly height-adjustable. Accordingly, the machine frame 19 is supported on the support feet 25 via the weighing cells 27.
  • the weighing cells 27 can be attached to an inner surface of a frame profile of the machine frame 19 facing away from the stationary floor 3.
  • the respective weighing cell 27 can be attached to the machine frame 19 at an end facing away from the point of application of the support foot 25.
  • the weighing cells 27 can be shear beam weighing cells, for example. Alternatives are possible, so that the weighing cell 27 can be designed, for example, as a compression load cell, bending beam weighing cell, double shear beam weighing cell or as a simple strain gauge.
  • the weighing cells 27 can be attached to all support points 24. Accordingly, the spinning preparation machine 1 can have, for example, four of the weighing cells 27 in a design with six of the filling shafts 5 and, for example, six of the weighing cells 27 in a design with ten of the filling shafts 5.
  • the weighing cells 27 can also be arranged directly on the stationary floor 3 and the support feet 25 can stand on the weighing cells 27.
  • FIG 3 shows an embodiment of the spinning preparation machine 1, in which the weighing cells 27 are provided at all of the, here four, support points 24.
  • the weighing cells 27 are provided at all of the, here four, support points 24.
  • resilient elements are provided at the support points 24, for example the damping elements 28.
  • FIG. 4 shows an alternative embodiment of the spinning preparation machine 1 to FIG. 3, in which the weighing cells 27 are not arranged at all support points 24, but only at a subset of the support points 24.1, 24.2.
  • the support points 24.1, 24.2 provided with the weighing cells 27 are arranged only on one side of the machine along a main axis 38 of the spinning preparation machine 1 which runs parallel to the longitudinal axis X.
  • the support points 24.1, 24.2 equipped with the weighing cells 27 lie on an imaginary connecting line 39 which is aligned parallel to the main axis 38. No weighing cells 27 are therefore arranged at the remaining support points 24.3, 24.4, which are located on the other side of the machine.
  • the spinning preparation machine 1 designed as a shaft mixer with the six filling shafts 5 shown here as an example two of the weighing cells 27 are sufficient for determining the weight, which are arranged in the main axis 38 on the same side of the machine and on the imaginary connecting line 39.
  • three of the weighing cells 27 can be provided due to the larger extent along the machine axis, i.e. the machine length, which are arranged on the same machine side and on the imaginary connecting line 39.
  • a vibration-damping element here a flexible hose element 29, is arranged between the machine housing 20 and the fiber flock inlet 9, which has a flow-conducting Connection between the fiber flock inlet 9 and the inlet 8 into the feed channel 6 provides.
  • a vibration-damping element here a further flexible hose element 31, is arranged between the machine housing 20 and the fiber flock outlet 18, which provides a flow-conducting connection between the mixing channel 16 or the outlet 17 and the fiber flock outlet 18.
  • a platform 30 on which the fan 10 is arranged can be placed on a vibration-damping element (not shown) at the bottom end for vibration damping. This also prevents a force shunt, which would lead to an incorrect, namely too low, weight being measured by the weighing device 26.
  • FIG. 5 shows a method for gravimetric fill level measurement of the spinning preparation machine 1 that can be filled with the fiber flakes 2 in simplified form using a flow chart. Possible embodiments are described below, in which not only the information about the positioning positions of the closure members 11 or the state of the flaps, but also other optional information from the spinning preparation machine 1 are included in the level measurement.
  • the control unit 37 determines in step 51 the operating mode in which the spinning preparation machine 1 is located.
  • the operating mode can be specified manually by user input.
  • the spinning preparation machine 1 can, for example, be operated in three different operating modes, namely filling mode 60, empty mode 70 and automatic mode 80.
  • filling operation 60 operating mode a filling process takes place in which at least one of the filling shafts 2 is filled with the fiber flakes 2 and the extraction device 34 comes to a standstill.
  • the filling operation 60 can be used, for example, to fill the spinning preparation machine 1 with the fiber flakes 2 to produce an initial supply.
  • the control unit 37 asks in step 61 of the filling operation 60 whether there is a material requirement.
  • This information can be provided by a higher-level controller, for example a line commander.
  • a material sensor could also be arranged in the fiber flock inlet 9.
  • the status of the feed rollers 13, 14 can be queried as an additional value, which should then be switched off.
  • the control unit 37 calculates the mass difference that resulted from the filling of the filling shafts 5 in the defined time interval after subtracting the weight force measured at the starting point.
  • the defined time interval can be, for example, one second to five seconds, although longer or shorter time intervals are also possible.
  • the measurement of the change in the weight force in the defined time interval is preferably repeated constantly when the spinning preparation machine 1 is in operation, i.e. it always starts again from the beginning in order to be able to calculate the change in the filling weight and, based on this, the filling levels of the filling shafts 5.
  • step 62 which filling shaft 5 was open for how long in the defined time interval and which of the filling shafts 5 was thus loaded with the fiber flakes 2. Since only one of the filling shafts 5 can be filled at any time, the corresponding proportion of the measured weight difference can be assigned to the respective filling shaft 5.
  • the empty operation operating mode 70 an emptying process takes place in which no loading of fiber flakes 2 takes place and the extraction device 34 removes the fiber flakes 2 from the filling shafts 5.
  • the empty operation 70 can, for example, serve to remove residual amounts of the fiber flakes 2 from the spinning preparation machine 1 and in particular the filling shafts 5 when a material is changed. In other words, there is no material requirement in empty operation 70, that is, no fiber flakes 2 enter the feed channel 6 via the fiber flake inlet 9, and the filling shafts 5 are only emptied.
  • the control unit 37 queries the status of the feed rollers 13, 14, in particular whether the feed rollers 13, 14 are rotating and at what feed roller speed they are driven in rotation.
  • step 72 the control unit 37 calculates the filling levels of the filling shafts 5.
  • the control unit 37 calculates the change in the filling weight in the defined time interval. From the change in the weight force detected by the weighing device 26, the mass difference is calculated, which is therefore a negative weight difference in empty operation 70. Because the extraction device 34 withdraws the fiber flakes 2 from all filling shafts 5 at the same time, the mass difference can be distributed evenly across all filling shafts 5. In other words, the filling level in all filling shafts 5 empties by the same amount. Due to the same design of the feed rollers 13, 14, which are coupled to a common drive, they rotate at the same speeds.
  • the feed rollers 13, 14 in the respective filling shaft 5 are equipped with their own individual drive, it can be determined for each filling shaft 5 whether it is being emptied. During empty operation, the filling shafts 5 are thus emptied, with partial or complete emptying of the filling shafts 5 being possible.
  • the control unit 37 can calculate a production of the spinning preparation machine 1 depending on the feed roller speed in such a time interval. Based on this, the control unit 37 can derive the production for further speeds. For this purpose, for example, speed-dependent production curves can be stored in the control unit 37.
  • step 81 of automatic mode 80 the control unit 37 queries the status of the feed rollers 13, 14.
  • the filling shafts 5 are emptied.
  • step 82 it is also queried whether there is a material requirement.
  • the material requirement is present, it is filled.
  • the actual material flow through the fiber flock inlet 9 into the feed channel 6 can optionally be monitored with additional sensors in the pipeline, for example in the fiber flock inlet 9. beeing confirmed.
  • the production of the spinning preparation machine 1 is regularly determined by the control unit 37 depending on the feed roller speed. This is advantageously always carried out when the filling shafts 5 are as full as possible, that is to say they are at least 50 percent full. This can be determined, for example, using differential pressure measurements and/or light barriers. Based on the change in the total weight, the production for the respective fiber material 2 can be determined depending on the feed roller speed.
  • the mass difference measured by means of the weighing device 26 the status of the feed rollers 13, 14, the weight distribution between the weighing cells 27 measured by the weighing device 26 can also be used. This results from the filling of the filling shafts 5 changing over the length of the machine. The signal from each individual weighing cell 27 is used separately. With simultaneous filling and emptying in automatic mode, the previously determined production can be used depending on the feed roller speed. Together with the change in the total weight, the mass of the fiber flakes 2 supplied can be determined.
  • the mass difference measured by the weighing device 26 during automatic operation in the recurring time interval which can be 5 seconds for example, which results from the change in the filling weight, is determined in step 83 when the control unit 37 calculates the filling levels of the filling shafts 5 as a function the positioning positions of the closure members 11 are taken into account in the respective time interval.
  • the production of the spinning preparation machine 1 is taken into account, since the fiber flakes 2 are drawn off via the take-off device 34.
  • step 83 the control unit 37 can compare which of the filling shafts 5 was open for how long in the defined time interval and into which of the filling shafts 5 the fiber flakes 2 reached. Since only one of the filling shafts 5 can be filled at any time, the corresponding proportion of the weight difference measured in the time interval can be assigned to the respective filling shaft 5.
  • step 90 the calculated filling levels of the filling shafts 5 are output, for example on a display on the spinning preparation machine 1 and/or via a Data interface for remote displays, for example a portable or stationary device, is provided.
  • Steps 81 and 82 result in that no fiber flocks 2 are fed via the fiber flock inlet 9 and that the feed rollers 13, 14 rotate.
  • the filling shafts 5 are thus emptied (emptying process).
  • the filling weight is calculated after deducting the empty weight from the weight value.
  • Calculated production 720 kilograms per hour [kg/h] at the current input roller speed, which may correspond to, for example, 70 percent of the maximum input roller speed.
  • step 83 depending on the position of the closure elements 6, the measured mass difference, i.e. the change in the filling weight, can now be specifically distributed to the individual filling shafts 5. Furthermore, the filling shafts 5 are emptied, that is, the feed rollers 13, 14 are driven in rotation. The filling shafts 5 are thus filled and emptied at the same time (filling and emptying process).
  • step 83 the mass difference (change in the filling weight) is distributed to the filling shafts 5.1, 5.2, 5.3, 5.4, 5.5 to calculate the filling levels.
  • the supplied mass of, here, 2 kilograms is assigned to the filling shaft 5 which was connected to the central fiber flock inlet 9 in the defined time interval due to the positioning positions of the closure members 11.
  • Calculated individual shaft fillings can continue to be regularly compared using pressure signals and/or light barriers as a reference point and corrected if necessary.
  • FIG. 6 shows a spinning preparation machine 1 according to a second embodiment, which largely corresponds to the previously described embodiment, so that reference is made to the above description with regard to the similarities.
  • the difference lies in the design of the substructure on which the machine frame 19 is supported.
  • a decoupling device 21 which acts as a base frame for a machine structure 22 comprising the machine frame 19, the flake storage 4 with the filling shafts 5 and the feed channel 6 as well as the machine housing 20.
  • the machine frame 19 and, in a further embodiment, the entire machine structure 22 is/are supported or set up on the decoupling device 21 at a distance from the stationary floor 3.
  • the decoupling device 21 can, for example, be designed as a coherent intermediate frame 23, which, here as an example, has four support points 24 for setting up on the stationary floor 3, it goes without saying that in the case of a larger or heavier spinning preparation machine, additional support points also exist 24 can be added or, in the case of a smaller spinning preparation machine, three support points 24 can generally ensure secure support.
  • a particularly height-adjustable support foot 25 is provided at each of the support points 24 in order to be able to align the decoupling device 21 with respect to the floor 3.
  • the weighing device 26 for gravimetric level measurement of the flake storage 4 which is arranged in the flow of force between the filling shafts 5 and the stationary floor 3.
  • the weighing device 26 has several of the weighing cells 27 on which the weight of the machine structure 22 rests. Damping elements 28 can be arranged between the weighing cells 27 and the decoupling device 21, here for example the intermediate frame 23.
  • the platform 30 for the fan 10 can be supported on the decoupling device 21.
  • the pipe holder 32 for the fiber flock outlet 18 can be supported on the intermediate frame 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

La présente invention concerne un procédé de mesure gravimétrique du niveau de remplissage d'une machine de préparation de filature (1), qui peut être érigée ou est érigée sur un plancher fixe (3), pour traiter des flocs de fibres (2), la machine de préparation de filature (1) comprenant : une pluralité d'arbres d'alimentation (5) pour les flocs de fibres (2), lesdits arbres d'alimentation étant disposés adjacents les uns aux autres ; un canal de chargement (6) qui est situé au-dessus des arbres d'alimentation (5), le côté d'entrée dudit canal de chargement étant relié à une entrée de floc de fibres centrale (9) et le côté de sortie dudit canal de chargement possédant une ouverture inférieure (7) pour chaque arbre d'alimentation (5) ; une pluralité d'éléments de fermeture (11) qui sont situés dans le canal de chargement (6) et qui peuvent être réglés au moyen d'actionneurs (36) ; une unité de commande (37) qui est conçue pour commander les actionneurs (36) afin de remplir les arbres d'alimentation (5) avec les flocs de fibre (2) de telle manière que, du fait des positions de réglage des éléments de fermeture (11), une seule des ouvertures inférieures (5) est reliée à l'entrée de floc de fibres centrale (9) à n'importe quel moment ; un dispositif d'évacuation (34) qui est situé au-dessous des arbres d'alimentation (5) et dont le côté d'entrée est relié aux arbres d'alimentation (5) et dont le côté de sortie est relié à une sortie de floc de fibres centrale (18) ; et un dispositif de pesage (26) qui est relié à l'unité de commande (37) au moyen de signaux et qui est situé dans le flux de force entre les arbres d'alimentation (5) et le plancher fixe (3). Le procédé comprend les étapes suivantes : mesure d'un changement de poids sur le dispositif de pesage (26) dans un intervalle de temps défini pendant un processus de remplissage et/ou de vidage ; calcul d'un changement d'un poids de remplissage des arbres d'alimentation (5) en utilisant l'unité de commande (37) sur la base du changement du poids dans l'intervalle de temps défini ; calcul des niveaux de remplissage des arbres d'alimentation (5) en utilisant l'unité de commande, le changement du poids de remplissage étant distribué à l'au moins un arbre d'alimentation (5) qui a été relié à l'entrée de floc de fibres (9) dans l'intervalle de temps défini sur la base des positions de réglage des éléments de fermeture. La présente invention concerne également une machine de préparation de filature.
PCT/EP2023/056372 2022-03-18 2023-03-13 Procédé de mesure gravimétrique du niveau de remplissage d'une machine de préparation de filature, et machine de préparation de filature WO2023174886A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202380014018.4A CN118284726A (zh) 2022-03-18 2023-03-13 用于纺纱准备机器的重量法测量填充状态的方法和纺纱准备机器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022106468 2022-03-18
DE102022106468.9 2022-03-18

Publications (1)

Publication Number Publication Date
WO2023174886A1 true WO2023174886A1 (fr) 2023-09-21

Family

ID=85703678

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/EP2023/056372 WO2023174886A1 (fr) 2022-03-18 2023-03-13 Procédé de mesure gravimétrique du niveau de remplissage d'une machine de préparation de filature, et machine de préparation de filature
PCT/EP2023/056371 WO2023174885A1 (fr) 2022-03-18 2023-03-13 Machine de préparation de filature pour le traitement de flocs de fibres

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/056371 WO2023174885A1 (fr) 2022-03-18 2023-03-13 Machine de préparation de filature pour le traitement de flocs de fibres

Country Status (2)

Country Link
CN (2) CN118284726A (fr)
WO (2) WO2023174886A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040255429A1 (en) 2003-05-13 2004-12-23 Peter Clausen Fiber dispensing apparatus
CH699166B1 (de) * 2004-12-14 2010-01-29 Truetzschler Gmbh & Co Kg Vorrichtung in der Spinnereivorbereitung zur Speisung einer Mehrzahl von Füllschächten.
EP3412805A1 (fr) * 2017-06-08 2018-12-12 Maschinenfabrik Rieter AG Réglage de pression dans une alimentation en flocons
EP3587631A1 (fr) 2018-06-07 2020-01-01 Maschinenfabrik Rieter AG Mesure du niveau de remplissage d'un magasin de flocons de fibres

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4445463A1 (de) * 1994-10-26 1996-05-02 Leopold Jungbauer Wiege- und Abfüllvorrichtung für durch Luft transportierbares Material
US9266662B1 (en) * 2012-09-11 2016-02-23 Vm Fiber Feeders Inc. Bulk fiber dispenser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040255429A1 (en) 2003-05-13 2004-12-23 Peter Clausen Fiber dispensing apparatus
CH699166B1 (de) * 2004-12-14 2010-01-29 Truetzschler Gmbh & Co Kg Vorrichtung in der Spinnereivorbereitung zur Speisung einer Mehrzahl von Füllschächten.
EP3412805A1 (fr) * 2017-06-08 2018-12-12 Maschinenfabrik Rieter AG Réglage de pression dans une alimentation en flocons
EP3587631A1 (fr) 2018-06-07 2020-01-01 Maschinenfabrik Rieter AG Mesure du niveau de remplissage d'un magasin de flocons de fibres

Also Published As

Publication number Publication date
CN118284726A (zh) 2024-07-02
WO2023174885A1 (fr) 2023-09-21
CN118140018A (zh) 2024-06-04

Similar Documents

Publication Publication Date Title
EP0466857B2 (fr) Dispositif, procede et mise en uvre du procede pour la detection d'un flux de production
EP0138212B1 (fr) Dispositif pour le remplissage simultané d'une matière liquide, gazeuse ou solide dans une pluralité de conteneurs, tels que des récipients, fûts, emballages etc.
DE102011050290B4 (de) Rundläufer-Tablettenpresse mit Tablettenablauf, Tablettenablauf hierfür, Wiegeeinrichtung hierfür und Verfahren zum Herstellen von Tabletten auf einer Tablettenpresse
EP0140213B1 (fr) Procédé et dispositif pour mesurer le débit de matériaux susceptibles de couler
DE102007050268A1 (de) Vorrichtung zum dosierten Mischen von schüttbaren Materialkomponenten
EP2369949A1 (fr) Équipement et procédé d'amenée de tabac haché entre une unité de chargement du tabac et une machine de transformation du tabac
DE102007005749A1 (de) Entleermagazin und Verfahren zum Entleeren von mit stabförmigen Produkten gefüllten Schragen, insbesondere Schachtschragen
EP3546625B1 (fr) Dispositif d'alimentation pour une carde
DE69103689T2 (de) Steuerungsverfahren beim Streuen von Bindemittel und Vorrichtungen zur Durchführung des Verfahrens.
WO2016020022A1 (fr) Dispositif de mélange de composants fibreux
EP0176668A1 (fr) Disposition d'un puits d'alimentation pour matière fibreuse
DE19939042A1 (de) Verfahren zur Bereitstellung eines zu dosierenden Materialgemischs und Ermittlung des Durchsatzes, und Anlage zur Durchführung des Verfahrens
EP2288546A1 (fr) Emballeuse rotative
DE102007042670A1 (de) Verfahren zur Ermittlung des längenbezogenen Bandgewichts eines Faserbandes sowie Spinnereivorbereitungsmaschine
WO2020025681A1 (fr) Système d'entrée pour moulin à cylindres, moulin à cylindres équipé d'un tel système d'entrée et procédé pour la détermination du niveau de remplissage de produit à broyer d'un réservoir d'un moulin à cylindres
EP1149196B2 (fr) Melange de composants fibreux
WO2023174886A1 (fr) Procédé de mesure gravimétrique du niveau de remplissage d'une machine de préparation de filature, et machine de préparation de filature
DE102017119069A1 (de) Verfahren zum Befüllen von Behältern mit einem Füllprodukt
WO2006086911A1 (fr) Alimentation en bourres et dispositif d'alimentation en bourres
DE3905139A1 (de) Verfahren und vorrichtung zum messen, regeln und steuern der menge eines im flug befindlichen faserflockenstroms
EP0485772B1 (fr) Appareil de mouture
CH683347A5 (de) Steuerung bzw. Regelung einer Faserverarbeitungsanlage.
WO2005005133A2 (fr) Procede et installation pour recevoir et traiter automatiquement des grappes
DE4025476A1 (de) Dosierverfahren und -vorrichtung zur abgabe vorgebbarer mengen von faserflocken pro zeiteinheit
CH713868A1 (de) Vorrichtung zum Austrag von Faserflocken aus einem Speicher.

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23711703

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202380014018.4

Country of ref document: CN

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112024018853

Country of ref document: BR