EP3894622B1 - Strahlsaugkasten und strahlsaugverfahren - Google Patents

Strahlsaugkasten und strahlsaugverfahren Download PDF

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Publication number
EP3894622B1
EP3894622B1 EP19827636.2A EP19827636A EP3894622B1 EP 3894622 B1 EP3894622 B1 EP 3894622B1 EP 19827636 A EP19827636 A EP 19827636A EP 3894622 B1 EP3894622 B1 EP 3894622B1
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EP
European Patent Office
Prior art keywords
suction
box
jet
opening
nozzle
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Active
Application number
EP19827636.2A
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German (de)
English (en)
French (fr)
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EP3894622A1 (de
Inventor
Christian Richter
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Autefa Solutions Germany GmbH
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Autefa Solutions Germany GmbH
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Publication of EP3894622A1 publication Critical patent/EP3894622A1/de
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Publication of EP3894622B1 publication Critical patent/EP3894622B1/de
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
    • D06B15/04—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours by suction
    • D06B15/043—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours by suction by means of a perforated drum

Definitions

  • the invention relates to a jet suction box for a suction device of a device for hydroentanglement of fiber material webs and a jet suction method with the features in the independent claims.
  • a jet suction box for a suction device which is provided for a water jet bonding device with which a fiber material web in the form of a nonwoven web is bonded with impinging water jets.
  • the jet suction box With the jet suction box, the water jets emitted at high pressure by several injectors of the hydroentanglement device are sucked in after penetrating the material web.
  • the hollow, tubular jet suction box has openings in the casing in the form of oblong holes, next to which sliding strips are arranged on both sides and protrude into a perforated drum. A cleaning strip and possibly two separating strips are arranged between the sliding strips.
  • the WO 01/79598 A2 shows a jet suction box of a suction device with a suction nozzle whose suction opening has a constant opening width.
  • the claimed jet suction technology i.e. the jet suction box and the jet suction method as well as the suction device and the device for hydroentanglement equipped with it, have various advantages.
  • the jet suction technology requires little energy and construction costs. It saves resources, is efficient and has low noise emissions. Due to the low construction and energy costs, the claimed jet suction technology is more economical than the prior art. Finally, better and more constant bonding results are also achieved when bonding a fiber material web with high-pressure liquid jets, in particular high-pressure water jets.
  • the claimed jet suction box can be an independent component of a suction device and a device for hydroentanglement equipped therewith.
  • the jet suction box can be retrofitted or converted to existing suction devices. It can also be implemented as initial equipment in a new extraction system.
  • the claimed jet suction box has on its box casing at least one suction nozzle with a slit-like suction opening, the width of which increases steadily toward the inside of the box.
  • the suction opening can in particular have a conically widening cross-section.
  • the suction opening opens out at the jacket opening on the outlet side.
  • the suction port has an outlet-side opening width that is larger than the inlet-side opening width.
  • the pressure loss on the nozzle outlet side can be kept low. Compared to a suction nozzle with a constant or reduced nozzle width, the pressure loss is significantly lower.
  • the positive effect of the claimed jet suction technology is all the greater, the greater the flow velocity at the nozzle outlet and the greater the suction velocity of the air/liquid mixture from the hollow interior of the box.
  • a moderate vacuum in the interior of the box and a low-dimensioned vacuum generator are sufficient to achieve a desired vacuum on the inlet side of the suction nozzle and a desired flow rate at the suction nozzle and at a suction opening of the jet suction box.
  • a negative pressure can be, for example, 15,000 Pa and a flow rate can be, for example, 25 m/s.
  • the one or more suction nozzles can be arranged in a suitable manner on the jet suction box. They can extend along the axis of the suction box and also transversely to the web of fibrous material.
  • the number and arrangement of the suction nozzles can be adapted to the number and arrangement of injectors or nozzle bars of a hydroentanglement device.
  • the suction nozzles can each face one of these injectors in the direction of emission of liquid jets, in particular water jets.
  • the emitted liquid and the ambient air entrained by the jet can be taken up and discharged particularly well and effectively in the claimed slit-like and in the further enlarged suction opening.
  • the flow of fibrous material web is thus moistened as little as possible.
  • the subsequent drying effort can be lower for the fiber material web, which resource consumption is also reduced and efficiency and profitability are increased.
  • the jet suction box can have a plurality of suction nozzles distributed in the circumferential direction on its box casing. These can be integrated into a correspondingly thick box casing. They are also designed as a nozzle attachment and are arranged over a shell opening of the box shell. The nozzle attachment protrudes outwards from the box jacket. It can project almost to a liquid-permeable, in particular perforated, conveying means for the fiber material web. Alternatively or additionally, the nozzle attachment on the box jacket can protrude inwards into the box interior.
  • the training with the nozzle attachment has several advantages.
  • the intake of false air can be reduced or avoided.
  • the one or more nozzle attachments locally projecting outwards from the jet suction box can create a space between the box jacket and the liquid-permeable conveyor, which can correspond to the space required for storing a drum-like conveyor.
  • Nozzle attachments protruding inwards from the box jacket into the box interior enable maximum expansion of the suction box and maximum interior volume, which is advantageous for optimizing the suction effect and suction capacity.
  • the claimed jet suction box can have any suitable shape. It can also be adapted to said conveyor.
  • the jet suction box can have a cubic or cuboid shape, in which case the conveying means can be designed, for example, as a straight section of a conveyor belt.
  • the jet suction box is designed as a straight jet suction pipe.
  • This can have an outside prismatic jacket have a flattening in the region of one or more shell openings.
  • the jacket can be cylindrical on the inside. Due to the flattening, a nozzle attachment can be arranged particularly favorably on the jet suction pipe.
  • the liquid-permeable conveying means can be designed, for example, as a rotary driven conveying drum and arranged coaxially with the stationary jet suction pipe.
  • the jet suction pipe can also have bearing surfaces for the conveyor drum.
  • the jet suction box in particular the jet suction pipe
  • several support struts are arranged in the one or more slot-like casing openings. These can be aligned at an angle to one another and arranged in a framework-like manner.
  • the casing opening adjoins its outlet-side end.
  • the jacket opening width can be equal to or larger than the suction opening width on the outlet side.
  • the width of the suction opening can be adjusted. As a result, it can be adapted to different application requirements, in particular also to varying operating modes of the hydroentanglement device. In the case of several suction nozzles arranged distributed over the transport path of the fiber material web, the width of their suction openings can be adjusted to be the same as one another or, if necessary, to be different.
  • Forming the suction nozzle as a nozzle attachment is particularly advantageous for such a width adjustment.
  • the suction nozzle, in particular the nozzle attachment can have side walls that can be moved relative to one another and an adjustment device for their mutual adjustment.
  • the prismatic outer outline and the one or more flats for a suction nozzle adjustment is particularly advantageous.
  • the suction device equipped with the claimed jet suction box is particularly efficient and economical.
  • the associated vacuum generator can be designed to be relatively weak in the above-mentioned manner and thus resource- and cost-effective. With recovery, the water can be separated from the water/air mixture sucked in in a particularly advantageous manner and, if necessary, fed back to the device for hydroentanglement.
  • the water used in the shot peening process can be used effectively and recovered to a high degree. A water discharge via the fibrous material web can be kept low.
  • the claimed hydroentanglement device can include a suction device and in particular a jet suction box of the type claimed.
  • the high pressure jets of liquid emitted to and penetrating the web of fibrous material may be water or any other suitable liquid.
  • a hydroentanglement device is therefore understood to mean all types of consolidation devices using such high-pressure liquid jets from any liquids.
  • the invention relates to a jet suction box (14) and a method for jet suction of high-pressure liquid jets from a device (1) for hydroentanglement.
  • the invention also relates to a suction device (6) with such a jet suction box (14).
  • the invention also includes a device (1) for hydroentanglement with such a jet suction box (14) and a suction device (6).
  • the invention also includes a hydroentanglement process and a suction process.
  • FIG 1 shows a plant with three devices (1) for hydroentanglement of a fiber material web (2).
  • the web of fibrous material (2) consists of textile fibers, in particular synthetic fibers. It is designed, for example, as a nonwoven fleece. It is supplied by a generating device (not shown), for example a card, a spunbond or spunbond tower, an airlay or the like, on a transport means (5). In this case, if required, further machines, for example a non-woven layer, can be interposed.
  • the transport means (5) can have an endlessly circulating and radiation-permeable transport belt.
  • the web of fibrous material (2) can run through the three devices (1) for hydroentanglement in succession.
  • the three devices (1) can be of the same design as one another. They each have one or more injectors (3). The preferably several injectors (3) are distributed and arranged one behind the other along the conveying path in the conveying direction of the fiber material web (2).
  • the web of fibrous material (2) is sprayed with thin high-pressure liquid jets (4), in particular water jets, arranged in a row or in a matrix. solidified, which are emitted from the injectors (3) each against the fiber material web (2) and penetrate it.
  • the respective injector (3) can be designed, for example, as a nozzle bar which is aligned transversely to the fiber material web (2) and to its transport path and the width of the fiber material web (2) for the most part, preferably completely, overlaps.
  • the jets of liquid (4) emitted are picked up by a suction device (6), sucked in and transported away.
  • the suction device (6) has according to figure 1 , 2 and 6 a jet suction box (14) and a conveyor (11) for transporting the fiber material web (2) in the area of the injector or injectors (3).
  • the conveying means (11) supports the web of fibrous material (2) against the impinging liquid jets (4).
  • the jet suction box (14) sucks in the liquid jets (4) emerging from the web of fibrous material (2). In addition, ambient air can be sucked in.
  • the jet suction box (14) is in the in figure 1 and 6 shown emission direction of the liquid jets (4) arranged below the conveyor (11).
  • the jet suction box (14) is arranged relatively stationary relative to the moving conveyor (11).
  • the jet suction box (14) is designed as a long and straight jet suction pipe (15).
  • a different configuration for example in the form of a cuboid box, is possible.
  • the features described below for the jet suction pipe (15) also apply correspondingly to other types of jet suction boxes (14).
  • the conveying means (11) is designed as a rotatingly driven conveying drum (12), in which the jet suction box (14) or the jet suction pipe (15) is arranged in a relatively stationary manner.
  • the conveyor drum (12) is arranged concentrically to the central axis (16) of the jet suction pipe (15) and rotates about this axis (16).
  • the conveyor drum (12) can be driven in rotation in any suitable manner.
  • a drive (13) is provided for this purpose, from which figure 2 For example, a ring gear is shown, which is arranged at one end of the conveyor drum (12).
  • the other parts of the drive (13), such as a motor with gear and output pinion, etc., are not shown.
  • the conveyor (11) is fluid-permeable. It allows the liquid jets (4) and also air to pass.
  • the conveying means (11) can, for example, have a perforated conveying element.
  • the drum shell is liquid-permeable.
  • the conveying means (11) can be designed in a different way, e.g. as a circulating belt conveyor. This can also be fluid-permeable and can, for example, have a punched or perforated conveyor belt.
  • the conveying drum (12) has a perforated, in particular perforated, cylindrical shell through whose openings the liquid jets (4) can reach the jet suction box (14) or jet suction pipe (15).
  • a negative pressure can be generated in the jet suction pipe (15), through which the emitted jets of liquid (4) can be sucked efficiently and in a targeted manner into the hollow interior of the box (17).
  • the jet suction pipe (15) is closed at one end and has a suction opening (43) at the other end, through which the suctioned liquid/air mixture can leave the box interior (17) again.
  • the web of fibrous material (2) wraps around the conveyor drum (12) over a large part of its circumference.
  • the web of fibrous material (2) can be conveyed by the drum rotation and also transferred to the next conveying drum (12) and, after passing through the last device (1) for hydroentanglement, transferred back to a conveyor belt or another means for transport.
  • the web of fibrous material (2) can rest directly on the drum shell. Alternatively, a moving conveyor belt can be arranged in between.
  • An injector (3) is arranged under the transport means (5) and at the transfer point of the fiber material web (2) to the first suction device (6), the emitted liquid jets (4) of which penetrate the transport belt. They also cause the fiber material web (2) to be carried along and transferred to the first conveyor drum (12). figure 1 shows this arrangement.
  • FIG 2 , 3 and 4 show schematically further components of the suction device (6).
  • the conveyor drum (12) is rotatably mounted on the jet suction pipe (15).
  • the jet suction pipe (15) can have bearing surfaces (41) at the front ends, which figure 3 and 4 are clarified.
  • figure 6 shows this arrangement.
  • the steel suction pipe (15) has a support pin at the closed front end and a pipe flange (42) for stationary assembly at the other open (43) front end.
  • the suction device (6) has a vacuum generator (7) with which the liquid/air mixture is sucked out of the jet suction pipe (15) through the opening (43) and through a subsequent line.
  • the suction device (6) can also have a recovery unit (8), with which the liquid is separated from the air and can be fed back to the one or more injectors (3) via a return line (9) and, if necessary, a cleaning device.
  • the air can be discharged via an outlet (10).
  • the vacuum generator (7) and the recovery (8) are in figure 2 only indicated schematically. They can be designed and arranged in any suitable way.
  • the recovery (8) can be configured as a cyclone, for example.
  • FIG. 3 to 8 illustrate the formation of the jet suction box (14) or the jet suction pipe (15).
  • the hollow jet suction tube (15) has a box jacket (18) or tube jacket, which is cylindrical in cross section on the inside and has a prismatic shape with several flattened areas (19) on the outside. figure 7 and 8th explains this training.
  • the jet suction pipe (14) has at least one suction nozzle (23) with a slit-like suction opening (25) on its box casing (18).
  • the width of the suction opening (25) increases towards the interior of the box (17).
  • the suction opening (25) can have a conical cross section, as is the case, for example, in Figure 6 to 8 is shown.
  • the suction nozzle (23) and its slit-like suction opening (25) extend along the axis (16) or suction box axis. They also preferably extend over the entire width of the fiber material web (2).
  • the number and arrangement of the suction nozzles (23) can depend on the number and arrangement of the one or more injectors (3).
  • three injectors are arranged in an arc around the conveying drum (12) and the jet suction pipe (15).
  • the arc arrangement and the emission direction of the liquid jets (4) can be concentric to the axis (16).
  • the suction nozzles (23) are arranged in a corresponding distribution on the box casing (18) of the jet suction pipe (15). They point with their suction opening (25) to the associated injector (3) and are opposite to this in the direction of emission. After penetrating the web of fibrous material (2) and the conveying means (11, 12), the liquid jet (4) emitted by the respective injector (3) reaches the suction opening (25) directly. In figure 6 this situation is shown with arrows.
  • the emission direction and the vertical axis of the suction opening (25) are aligned radially to the axis (16).
  • the penetration of the respective liquid jets (4) into the suction opening (25) is supported by the negative pressure in the box interior (17) and the suction effect.
  • air is sucked in from the outside through the suction opening (25) and entrained with the liquid jets (4).
  • the three suction nozzles (23) distributed in the circumferential direction on the box casing (18) are each designed as a nozzle attachment (24) which is arranged over an axial casing opening (20) in the box casing (18).
  • the nozzle attachment (24) protrudes outwards in the radial direction from the box jacket (18) and extends according to figure 1 and 6 up close to the conveyor (11), in particular to the conveyor drum (12).
  • the close approach or, if necessary, the attachment of the nozzle attachment (24) to the conveying means (11), in particular to the conveying drum (12) prevents false air from being sucked in at the side, in particular from the intermediate space (22).
  • the preferably slit-like shell opening (20) extends along the axis (16) in the box shell (18). It extends over the width of the material web and ends in front of the front edges of the jet suction pipe (15).
  • a plurality of support struts (21) are arranged in each of the slit-like casing openings (20). The array may have an oblique orientation and may be trussed.
  • the nozzle attachments (24) have axially directed side walls (28) which are spaced apart laterally and between which the suction opening (25) is arranged.
  • the suction opening (25) opens out on the inlet side (26) or on the outside of the nozzle attachment (24) and close to the conveying means (11, 12).
  • the suction opening (25) opens out at the jacket opening (20).
  • the nozzle attachment(s) (24) are tightly sealed at the front ends by closures (40).
  • the side walls (28) can also be supported axially here.
  • the side walls (28) can be in one piece or in several parts. In the exemplary embodiments shown, they are segmented, with the respective side wall segments being guided to one another in a form-fitting manner by means of complementary stepped end faces.
  • the suction opening (25) preferably has the conical cross-sectional shape shown.
  • the width of the suction opening (25) is smaller on the inlet side (26) than on the outlet side (27).
  • the width of the jacket opening (20) in the box jacket (18) can be equal to or greater than the width of the suction opening (25) on the outlet side.
  • the side walls (28) of the nozzle attachments (24) can each have a sloping inner wall (29) to form the said change in width.
  • the wall slope can be mirror-symmetrical with respect to the radial direction starting from the axis (16). Alternatively, an asymmetrical design is possible.
  • the enlargement of the suction opening width can be continuous in the embodiments shown.
  • the angle of inclination ⁇ between the inclined wall (29) and the radial direction can be between 8° and 15°, for example. A range between 10° and 13° is preferred. figure 8 clarifies this fact. 2
  • the width of the suction opening (25) can be adjusted. If required, the angle of inclination ⁇ can alternatively or additionally be changed and adjusted in an embodiment that is not shown.
  • the suction nozzle (23), in particular the nozzle attachment (24), has side walls (28) that can be moved relative to one another and an adjustment device (34) for their mutual adjustment.
  • the adjusting device (34) can have clamping means (35) for the mutual adjustment of the side walls (28) and a respective nozzle holder (38) for fixing the side walls (28) to the box casing (18).
  • the side walls (28) each have a stepped outer wall (30). This can have a laterally protruding base (33) at the bottom end facing the axis (16). Furthermore, the side walls (28) on the inlet side (26) or on the outside of the nozzle attachment (24) can each have a convexly curved or sloping roof wall (31). In this way, together with the conveying means (11, 12), a seal with respect to the intermediate space (22) can be effected.
  • the side walls (28) can each have a flat bottom wall (32).
  • the bottom wall (32) can rest on a bevel (19) of the box casing (18) and can slide along transversely to said radial direction during adjustment.
  • a seal (39) can be arranged between the bottom wall (32) and the bevel (19).
  • the nozzle holder (38) holds the nozzle attachment (24) and its side walls (28) on the box casing (18) and at the same time enables the side walls (28) to be adjusted transversely to change the width of the suction opening.
  • the nozzle holders (38) are each designed, for example, as a clamping claw, which is fastened to the box shell (18) by screws or in some other way and which engages over the respective base (33) with a claw arm and against the box shell (18) or the flattening ( 19) fixed.
  • the nozzle holders (38) can extend over the entire length or part of the length of the nozzle attachments (24). In the exemplary embodiments shown, there are several shorter nozzle holders (38) distributed along the box casing (18).
  • the clamping means (35) for adjusting the width of the suction opening (25) acts between the opposite side walls (28) of the respective nozzle attachments (24).
  • the clamping means has, for example, axial clamping strips (36) which each rest against the outer wall (30) and are supported on the base (33).
  • the clamping strip (36) arranged on the respective side walls (28) can be designed in one piece and can extend over the entire length of the respective nozzle attachment (24). Alternatively, it may be segmented.
  • the tensioning means (35) also has a plurality of tensioning pins (37) which extend transversely through the side walls (28) and which are adjustably fastened to the tensioning bars (36).
  • the width of the suction opening can be changed by adjusting, in particular twisting, the dowel pins (37).
  • the clamping pins (37) can be designed as screw pins, for example, with which the spaced clamping bars (36) can be mutually screwed and braced.
  • the dowel pins (37) pass through the side walls (28), according to figure 8 in the area of the suction opening (25), a clamping sleeve is pulled onto the respective clamping pin (37), which is accommodated in a blind hole in the inner walls (29) and supported axially by a spring.
  • the clamping strips (36) are moved closer or further away from one another, taking their respective side wall (28) with them, with the clamping sleeve with the springs exerting a central counterforce on the side walls (28) and these resting against their respective clamping strip (36) holds.
  • the adjusting device (34) and the clamping means (35) can be constructed in a different way.
  • the fibrous material web (2) solidified with the liquid jets (4) in one or more water jet solidification devices (1) can be transported to subsequent further processing (not shown).
  • This can, for example, be a drying device with a squeezing mechanism and/or a drying oven.
  • further processing devices for example a fleece laying device, a winding device, a cutter or the like.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
EP19827636.2A 2018-12-14 2019-12-09 Strahlsaugkasten und strahlsaugverfahren Active EP3894622B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202018107163.7U DE202018107163U1 (de) 2018-12-14 2018-12-14 Strahlsaugkasten
PCT/EP2019/084271 WO2020120412A1 (de) 2018-12-14 2019-12-09 Strahlsaugkasten und strahlsaugverfahren

Publications (2)

Publication Number Publication Date
EP3894622A1 EP3894622A1 (de) 2021-10-20
EP3894622B1 true EP3894622B1 (de) 2023-01-25

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EP19827636.2A Active EP3894622B1 (de) 2018-12-14 2019-12-09 Strahlsaugkasten und strahlsaugverfahren

Country Status (6)

Country Link
US (1) US11767624B2 (enrdf_load_stackoverflow)
EP (1) EP3894622B1 (enrdf_load_stackoverflow)
JP (1) JP2022513825A (enrdf_load_stackoverflow)
CN (1) CN113166998B (enrdf_load_stackoverflow)
DE (1) DE202018107163U1 (enrdf_load_stackoverflow)
WO (1) WO2020120412A1 (enrdf_load_stackoverflow)

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DE102021103314A1 (de) 2021-02-12 2022-08-18 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung zum Absaugen eines Fluids in einer Nonwovensanlage
CN112981726A (zh) * 2021-02-20 2021-06-18 江苏迎阳无纺机械有限公司 水刺头的水针保护装置
DE102021107902A1 (de) * 2021-03-29 2022-09-29 Andritz Küsters Gmbh Anlage zur Verfestigung mindestens einer nass- oder trockengelegten Faserlage zu einer Vliesbahn, mit einem Förderer, der ein umlaufendes Band mit einem oberen Trum umfasst, auf welches die mindestens eine Faserlage ablegbar und in einer Produktionsrichtung verlagerbar ist
DE202022103600U1 (de) 2022-06-29 2023-10-06 Autefa Solutions Germany GmbH Strahlsaugkasten
DE202022106415U1 (de) 2022-11-15 2024-02-16 Autefa Solutions Germany Gmbh Faserbehandlungsanlage

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CN113166998A (zh) 2021-07-23
DE202018107163U1 (de) 2020-03-13
EP3894622A1 (de) 2021-10-20
WO2020120412A1 (de) 2020-06-18
US20220025563A1 (en) 2022-01-27
CN113166998B (zh) 2023-02-28
JP2022513825A (ja) 2022-02-09
US11767624B2 (en) 2023-09-26

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