EP4045708A1 - Bande d'étanchéité et dispositif d'étanchéité - Google Patents

Bande d'étanchéité et dispositif d'étanchéité

Info

Publication number
EP4045708A1
EP4045708A1 EP20780149.9A EP20780149A EP4045708A1 EP 4045708 A1 EP4045708 A1 EP 4045708A1 EP 20780149 A EP20780149 A EP 20780149A EP 4045708 A1 EP4045708 A1 EP 4045708A1
Authority
EP
European Patent Office
Prior art keywords
sensor
sealing strip
sealing
protective material
strip
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP20780149.9A
Other languages
German (de)
English (en)
Inventor
Marc Erkelenz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
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 Voith Patent GmbH filed Critical Voith Patent GmbH
Priority to EP23187788.7A priority Critical patent/EP4253650A3/fr
Publication of EP4045708A1 publication Critical patent/EP4045708A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/14—Drying webs by applying vacuum
    • D21F5/146—Vacuum seals
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/10—Suction rolls, e.g. couch rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/14—Drying webs by applying vacuum
    • D21F5/143—Drying webs by applying vacuum through perforated cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems
    • D21G9/0036—Paper-making control systems controlling the press or drying section
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08—Protective devices, e.g. casings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes

Definitions

  • the invention relates to a sealing strip for a sealing device for sealing a negative pressure zone of a suction roll for a machine for producing or processing a fibrous web according to the preamble of claim 1 and the corresponding sealing device.
  • a large number of vacuum rollers are used in machines for the production of paper or cardboard.
  • suction rolls one or more suction zones usually have to be sealed against the inner wall of the roll shell in order to prevent an excessive drop in the negative pressure and thus reduce the suction effect.
  • this sealing is usually done by so-called sealing strips, which are pressed against the inner wall of the roll shell with a certain pressure. These sealing strips are in frictional contact with the roll shell and are therefore exposed to a comparatively high level of wear due to abrasion.
  • the object is achieved by a sealing strip for a sealing device for sealing a negative pressure zone of a suction roll for a machine for the production or processing of a fibrous web, in particular a paper, cardboard or tissue machine, with an upper side which the Sealing surface of the sealing strip forms, the sealing strip comprising a sensor unit which has a first T-sensor with a first distance from the sealing surface and a second T-sensor with a second distance from the sealing surface, and wherein the first distance is smaller than the second distance .
  • the sealing strip comprises a base material and a protective material that is different from the base material and that the sensor unit is embedded, in particular cast, in the protective material.
  • T-sensors are sensors that are connected to an electrical voltage source for measurement.
  • the T sensors can in particular be temperature sensors. Since this is the preferred embodiment, the invention will be explained in the further course of the application using the example of these temperature sensors. Alternatively, however, the T-sensors can be designed as contact sensors, for example, which generate an electrical signal when they come into contact with the metallic roll shell.
  • a T-sensor can also be designed simply as a conductor loop.
  • the measuring effect of such a sensor is that the electrical line is interrupted as soon as part of the conductor loop is destroyed by wear.
  • the inventor has recognized that the cause for this lies in the penetration of moisture, which damages the electronics.
  • a first temperature sensor is destroyed by the roller, whereby the first wear signal is determined.
  • this moisture will slowly but continuously penetrate further along the circuit board through diffusion, capillary forces or the like and destroy the electronics attached there. A reliable, permanent measurement over the long service life of the bar mentioned above is therefore not possible.
  • the inventor now proposes separating the T-sensors - in particular in the form of temperature sensors - from one another as well as possible - and advantageously also from any other electrical components installed.
  • the sensor unit is embedded in a protective material.
  • the sensors are advantageously cast in a protective material, possibly together with the circuit board or another carrier on which they are attached.
  • the protective material is a different material than the base material of the sealing strip. While the base material can be optimized in terms of its function to essentially provide the sealing surface of the sealing strip, the protective material can be optimized to prevent or at least severely hinder the penetration of moisture into the electrics or electronics of the sensors.
  • Advantageous base materials can consist of or comprise a graphite. Mixtures of graphite with an elastomer, in particular, can be very advantageous.
  • Polymer materials can preferably be used as protective material.
  • the protective material can advantageously be selected in such a way that it adheres to T-sensors or the circuit board in order to make the penetration of moisture even more difficult.
  • Another selection criterion for a suitable protective material is the function of water repellency, hydrophobicity and / or minimal water absorption or Swelling of the material. It is particularly advantageous if the protective material is more hydrophobic than the base material.
  • the sealing strip can furthermore be a control unit, e.g. in the form of a microchip, which are connected or can be connected to the first T-sensor and / or the second T-sensor.
  • a control unit e.g. in the form of a microchip
  • this control unit can for example be set up to determine the measured temperature from the raw data transmitted by the temperature sensors. Furthermore, the control unit can be set up to use the raw data transmitted by the T sensors to determine the destruction of the sensor due to wear . It is particularly advantageous if both the temperature and the state of wear of the sensor, and thus also the state of wear of the strip, are determined and, in particular, also transmitted.
  • the control unit is advantageously designed as part of the sensor unit and is thereby embedded in the protective material.
  • connection between the T-sensors and the control unit can be made via cables, for example.
  • connection can also be made via printed conductors.
  • connection between T-sensors and control unit is provided in the lower part, especially in the lower third of the sealing strip, that is, in the part that is as far away as possible from the sealing surface. In this way it can be largely avoided that moisture, which penetrates along the associated circuit board via an already destroyed T-sensor, penetrates to the control unit during the operating time of the bar and damages it.
  • the sensor unit can also comprise further sensors, in particular a third T-sensor and a fourth T-sensor, which are also connected or can be connected to the control unit.
  • the third (fourth, fifth, etc.) T-sensor can have a third distance to the surface, which differs from the first and second distance a third wear level can be determined)
  • the third T-sensor again has the first or second distance to the sealing surface. In this case, it can be checked whether the associated wear level is reached at different points across the width at the same time.
  • the sensor unit also includes an energy supply for supplying the T-sensors and / or the control unit. This can be a battery, for example.
  • the sensor unit can also comprise a transmission device which is set up to set up a data connection, in particular a wireless data connection, to an evaluation unit outside the sealing strip.
  • the control unit can also be set up to control the transmission device.
  • the transmission of the data by means of the data connection can take place continuously or at predefined or predefinable time intervals.
  • the first T-sensor and the second T-sensor are separated from one another by protective material.
  • the direction of its longest extension is referred to as the width direction of the sealing strip, since it extends over the machine width when it is intended to be used in a machine for the production or treatment of a fibrous web.
  • the separation of the T-sensors can be implemented, for example, in that the first T-sensor is mounted on a first board and the second T-sensor is mounted on a second board. Both circuit boards are embedded, in particular cast, in the protective material as part of the sensor unit. With such a modular structure, the individual T-sensors do not have to be placed directly next to one another.
  • the (width) distance between the sensors - and if necessary also to the control unit can be designed variably.
  • the sensors can have a distance that can be up to 200mm, but also up to 500mm or more. The greater these distances, the less likely it is that moisture will penetrate via a destroyed sensor to a sensor that is still active or to the control unit and destroy it.
  • the two T-sensors can also be mounted on the same circuit board.
  • good separation of the sensors can also be achieved here.
  • the sealing strip comprises two or more sensor units. These sensor units can be arranged distributed over the width direction of the sealing strip. In this way it can be determined, among other things, whether the temperature and wear of the bar is uniform across the width, or whether some areas wear out faster or heat up more than others.
  • sensor units in the area of the middle as well as the two edges. At least three sensor units are required for this.
  • a sealing device for sealing a vacuum zone of a suction roll for a machine for producing or processing a fibrous web, in particular a paper, cardboard or tissue web is proposed, the sealing device comprising at least one sealing strip according to one aspect of the invention.
  • the sealing device can advantageously comprise two or more sealing strips according to one aspect of the invention. Particularly preferably, all sealing strips can be designed according to one aspect of the invention.
  • the sealing device comprises an evaluation unit which is coupled or can be coupled to at least one control unit - preferably all control units - via a data connection, in particular a wireless data connection.
  • an evaluation unit can be set up to visualize the temperature and wear data of a sealing strip.
  • the evaluation unit can be set up to determine a remaining service life of the sealing strip from the determined wear data - possibly using other data from the machine.
  • the evaluation unit can also be implemented in the form of a mobile device, such as a smartphone or tablet computer. This has the advantage that the operating personnel can directly recognize the wear condition of the strips, for example during a maintenance tour through the system. It is then particularly advantageous if the sealing device comprises several such evaluation units. Then every employee can independently access this data with their mobile device with them and, if necessary, derive measures from it. As already mentioned at the beginning, the inventor proposes to solve the problem, to separate the T-sensors - especially in the form of temperature sensors - as well as possible from one another - and advantageously also from any other built-in electrical components.
  • the incisions are then not filled with a protective material, but with the base material of the sealing strip.
  • the width of the incisions should preferably be at least 5mm or 10mm here. Technologically, there are also significantly larger distances of 200mm, 500mm or more desirable. In the case of the depth of an incision, it is advantageous if it extends at least 2 mm, preferably 5 mm, particularly preferably 10 mm or more below the position of the deeper of the two sensors.
  • Sentence 1 Sealing strip for a sealing device for sealing a
  • the sealing strip comprising a sensor unit which has a first T-sensor with a first distance from the sealing surface and a second T-sensor with a second distance from the sealing surface, and the first Distance is less than the second distance, and wherein the sealing strip comprises a base material, characterized in that the first T-sensor is mounted on a first board and the second T-sensor on a second board, which is spaced apart in separate recesses of the base material Sealing strip are attached.
  • Sentence 1b Sealing strip for a sealing device for sealing a
  • Vacuum zone of a suction roll for a machine for the production or processing of a fibrous web in particular a paper, cardboard or
  • the sealing strip comprising a sensor unit which has a first T-sensor with a first distance from the sealing surface and a second T-sensor with a second distance from the sealing surface, and the first Distance is less than the second distance, and wherein the sealing strip comprises a base material, characterized in that the first T-sensor and the second T-sensor are mounted on a common board, the common board between the Sensors has an incision and the sensor unit is fastened in the sealing strip in such a way that the T-sensors are attached at a distance from one another in separate recesses in the base material of the sealing strip.
  • Sentence 2 Sealing strip according to sentence 1 or sentence 1b, characterized in that the first and / or the second T-sensor is a temperature sensor.
  • Sentence 3 Sealing strip according to one of the previous sentences, characterized in that the first T-sensor and the second T-sensor, viewed in the width direction of the sealing strip, are separated from one another by base material.
  • Sentence 4 Sealing strip according to one of the previous sentences, characterized in that the base material comprises or consists of graphite.
  • sealing strip according to one of the previous sentences, characterized in that the sealing strip further comprises a protective material that is different from the base material and the sensor unit is completely or partially embedded, in particular cast, in the protective material
  • Sentence 5a Sealing strip according to sentence 5, characterized in that the protective material comprises or consists of a polymer material.
  • Sentence 6 Sealing strip according to one of the previous sentences, characterized in that the sensor unit has a control unit which is connected or can be connected to the first T-sensor and / or the second T-sensor.
  • Sentence 7 Sealing strip according to one of the previous sentences, characterized in that the sensor unit comprises further T-sensors, in particular a third T-sensor and a fourth T-sensor, which are in particular connected or can be connected to a control unit. Sentence 8. Sealing strip according to one of the previous sentences, characterized in that the sensor unit comprises a power supply for supplying the T-sensors and / or the control unit. Sentence 9. Sealing strip according to one of the previous sentences, characterized in that the sensor unit comprises a transmission device which is set up to establish a data connection, in particular a wireless data connection, to an evaluation unit outside the sealing strip. Sentence 10. Sealing strip according to one of sentences 5 to 9, characterized in that both the first board and the second board are embedded, in particular cast, in the protective material.
  • Sentence 11 Sealing strip according to one of the previous sentences, characterized in that the sealing strip comprises two or more sensor units.
  • Sealing device for sealing a vacuum zone of a suction roll for a machine for producing or processing a fibrous web, in particular a paper, cardboard or tissue web, characterized in that the sealing device comprises at least one sealing strip according to one of the previous sentences.
  • Sentence 13 Sealing device according to sentence 12, characterized in that the sealing device comprises an evaluation unit which is coupled or can be coupled to at least one control unit via a data connection, in particular a wireless data connection.
  • FIG. 1 shows a sealing strip as is known from the prior art.
  • FIG. 2 shows a sealing strip which is designed according to one aspect of the invention.
  • Figure 2b shows a sealing strip, according to a further aspect of the invention.
  • FIG. 3 shows a sealing strip, according to a further aspect of the invention.
  • FIG. 4 shows a sealing strip according to a further aspect of the invention.
  • FIG. 5 and FIG. 5a show a section from a sensor unit as can be used for a sealing strip according to aspects of the invention.
  • FIG. 6 shows a section of a suction roll which is equipped with a sealing device according to one aspect of the invention
  • FIG. 1 shows a section from a sealing strip as is known from the prior art.
  • Several sensor units 2 are provided in the sealing strip 1.
  • Each of the sensor units has four temperature sensors 2.1, 2.2, 2.3, 2.4, which are arranged at different distances from the top 10 of the sealing strip 1.
  • the temperature sensors 2.1, 2.2, 2.3, 2.4 are mounted on a common circuit board 5, together with a control unit 3 and a battery 4 for power supply.
  • the sensors 2 If the first temperature sensor 2.1 is destroyed by wear in this embodiment of a bar, moisture can penetrate at this point, which spreads along the board 5 largely unhindered in the direction of the other sensors 2.2, 2.3, 2.4 and the electrical or electronic components, and these Can destroy components.
  • FIG. 2 shows a sealing strip 1 with a sensor unit 2, which is designed according to one aspect of the invention.
  • four temperature sensors 2.1, 2.2, 2.3, 2.4 are arranged, for example, on a common circuit board 5 with a control unit 3 and a suitable power supply 4.
  • the temperature sensors 2.1, 2.2, 2.3, 2.4 are connected to the control unit 3 via suitable lines 7.
  • the sensor unit 2 from FIG. 2 is embedded, specially cast, in a protective material 30.
  • the protective material 30 can be a polymer material 30, for example.
  • the protective material 30 differs from the base material 20 of the sealing strip 1, which usually consists of or comprises a graphite.
  • the protective material 30 encloses the sensor unit 2 either - as shown in Figure 2 - completely or in parts.
  • the temperature sensors 2.1, 2.2, 2.3, 2.4 can preferably be completely or largely enclosed by the protective material 30.
  • This protective material 30, which advantageously adheres to the temperature sensors 2.1, 2.2, 2.3, 2.4 and / or the circuit board 5.
  • control unit 3 can comprise a transmission device or be connected to it in order to set up a data connection, in particular a wireless data connection, to an evaluation unit outside the sealing strip.
  • a wireless data transmission can take place, for example, via Bluetooth, WLAN or the like.
  • the plate 5 is additionally provided with incisions 6. This creates a distance in the CD direction between adjacent temperature sensors 2.1, 2.2, 2.3, 2.4, which is filled with protective material 30. In this way, the penetration of moisture from a worn sensor to its neighboring sensor that is still intact is also hindered.
  • the width of the incisions 6 should preferably be at least 1 mm, particularly preferably at least 5 mm or 10 mm. Technologically, significantly larger distances of 200mm, 500mm or more are also desirable. Since such boards 5 become unwieldy, however, alternative designs will be described in further figures.
  • the depth of an incision it is advantageous if it extends at least 2 mm, preferably 5 mm, particularly preferably 10 mm or more below the position of the deeper of the two sensors.
  • FIG. 2b shows a variant of the strip 1 from FIG. 2.
  • the two strips 1 differ only in that, in FIG. 2, the entire sensor unit 2 together with the protective material 30 lies inside the strip 1 and is completely surrounded by base material 20.
  • a part of the bottom 11 of the bar 1 is formed by protective material 30. This can be advantageous in terms of production technology.
  • the sensor unit 2 can be inserted from below into a suitable recess in the base material 20 of the strip 1 and encapsulated with the protective material 30. Alternatively, a sensor device 2 already embedded in protective material 30 can also simply be inserted into the bar via the underside.
  • the embodiment in Figure 3 shows a bar 1 according to a further aspect of the invention.
  • the sensor unit 2 is now no longer arranged on a single circuit board 5.
  • each temperature sensor 2.1, 2.2, 2.3, 2.4 is attached to a separate circuit board 5.1.
  • Further elements can also be attached to each of these boards 5.1.
  • the control unit 3 and / or the power supply 4, which are provided on a separate, separate circuit board 5 in FIG. 3, can be provided on a common circuit board together with one of the temperature sensors. It is advisable here if the control unit is mounted on a circuit board together with that temperature sensor 2.4 which is furthest away from the top 10.
  • the lines 7 for connecting the sensors 2.1, 2.2, 2.3, 2.4 to the control unit can be implemented entirely or partially as a cable connection.
  • the incisions 6 of the sensor unit 2 shown in FIG. 2 / 2b are replaced in FIG. 3 by the distances between the sensors. These distances can be dimensioned analogously to the incisions.
  • the individual components are still embedded in the protective material 30 and joined together so that the entire sensor unit 2 is a single element.
  • FIG. 4 shows by way of example that sealing strips 1 can also be implemented according to one aspect of the invention, in which the sensor unit 2 consists of several separate parts.
  • the sensor unit 2 is essentially constructed in the same way as the unit in FIG. 3, but only the temperature sensors with their circuit boards are now embedded individually in protective material 30.
  • the sensor packages comprising the temperature sensor 2.1, the associated circuit board 5.1 and the embedding protective material 30 are in principle freely movable, and only via lines 7 with the control unit 3 connected.
  • the temperature sensors 2.1, 2.2, 2.3, 2.4 can be positioned comparatively easily with large distances of 200 mm, 500 mm or more from one another and from the control unit 3. This not only increases the reliability in the event of moisture penetration. It also enables the strip 1 to be easily monitored over its entire width.
  • the third temperature sensor 2.3 and the fourth temperature sensor 2.4 are again at the first distance from the surface 10, for example, the uniformity of the wear of the strip can be checked.
  • the sensor unit 3 in FIG. 4 shows that the entire sensor unit 2 does not need to be enclosed by protective material 30.
  • the circuit board 5 of the control unit 3 is only partially enclosed by protective material 30.
  • an embodiment is also conceivable in which the circuit board with the control unit 3 is not at all enclosed by protective material 30. In these two ways, it is possible, for example, to prevent sensitive electronics from being damaged by being embedded in protective material 30 - e.g. by the temperature of the molten protective material 30 during pouring.
  • FIGS. 5a and 5b each show a lateral section of a temperature sensor 2.1 on a circuit board 5.1, which can each be used as a temperature sensor 2.1 for a sensor unit 2 in a bar 1 according to various aspects of the invention.
  • protective material 30 on the side, front, back and below the temperature sensor 2.1 can prevent further penetration of moisture after the wear of the sensor 2.1
  • protective material 30 above the temperature sensor 2.1, i.e. in the direction of the top 10 of the bar cannot make any contribution to this.
  • Protective material 10 provided there is namely already removed by the moving roller shell before the actual sensor is destroyed. In this respect, it can be very advantageous if no protective material 30 is provided above the actual temperature sensor 2.1, 2.2, 2.3, 2.4 as shown in FIG. 5b, or if this protective material 30 is removed before the sensor device 2 is installed in the strip body.
  • FIG. 6 shows an example of the installation situation of a sealing device according to one aspect of the invention in a suction roll.
  • the sealing device here comprises two sealing strips 1, each of which is mounted in a strip holder 300.
  • the strips 1 are pressed against the jacket 100 of the suction roll by means of a pressure hose 350.
  • the sealing strips 1 seal a negative pressure zone 200.
  • the material, in particular the base material 20 of the strip wears.
  • the first temperature sensor 2.1 which is arranged at a first distance from the upper side 10 of the unworn strip 1, is destroyed.
  • the evaluation unit can determine that the temperature sensor 2.1 has been destroyed and that the first level of wear has thus been reached.
  • Data can be transmitted from the control unit 3 to an evaluation unit 500 via a transmission device.
  • the transmission takes place wirelessly.
  • wired data transmission is also conceivable. Since the strip holders 3 do not rotate when the suction roll is in operation, a cable can be led out of the strip 1 in a comparatively simple manner.
  • the roll shell 100 is provided with a large number of bores. Through these bores, moisture from the fibrous web or a covering can get into the interior of the suction roll and thus also to the sealing strip 1.
  • humidifying devices are usually provided in such suction rolls in order to lubricate a lubricant - usually water- to be introduced between the roll shell 100 and the top 10 of the sealing strip 1.
  • a lubricant usually water- to be introduced between the roll shell 100 and the top 10 of the sealing strip 1.
  • the examples shown should once again illustrate the possibilities that arise within the scope of the invention. However, the invention is not restricted to these embodiments. In particular, other suitable types of T-sensors can also be used instead of the temperature sensors.

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Abstract

L'invention concerne une bande d'étanchéité et un dispositif d'étanchéité pour étanchéifier une zone de pression négative d'un cylindre d'aspiration d'une machine de production ou de traitement d'une bande de matière fibreuse, en particulier d'une machine à papier, à carton ou à papier mousseline, la bande d'étanchéité présentant une face supérieure, qui forme sa surface d'étanchéité, et comprenant une unité de détection, qui comporte un premier capteur de température à une première distance par rapport à la surface d'étanchéité et un second capteur de température à une seconde distance par rapport à la surface d'étanchéité, la première distance étant inférieure à la seconde distance, la bande d'étanchéité étant constituée d'un matériau de base et d'un matériau de protection qui est différent du matériau de base, et l'unité de capteur étant incorporée, en particulier moulée, dans le matériau de protection.
EP20780149.9A 2019-10-16 2020-09-23 Bande d'étanchéité et dispositif d'étanchéité Withdrawn EP4045708A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23187788.7A EP4253650A3 (fr) 2019-10-16 2020-09-23 Baguette d'étanchéité et dispositif d'étanchéité

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019127850.3A DE102019127850A1 (de) 2019-10-16 2019-10-16 Dichtleiste und Dichteinrichtung
PCT/EP2020/076501 WO2021073845A1 (fr) 2019-10-16 2020-09-23 Bande d'étanchéité et dispositif d'étanchéité

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP23187788.7A Division EP4253650A3 (fr) 2019-10-16 2020-09-23 Baguette d'étanchéité et dispositif d'étanchéité

Publications (1)

Publication Number Publication Date
EP4045708A1 true EP4045708A1 (fr) 2022-08-24

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP23187788.7A Withdrawn EP4253650A3 (fr) 2019-10-16 2020-09-23 Baguette d'étanchéité et dispositif d'étanchéité
EP20780149.9A Withdrawn EP4045708A1 (fr) 2019-10-16 2020-09-23 Bande d'étanchéité et dispositif d'étanchéité

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EP23187788.7A Withdrawn EP4253650A3 (fr) 2019-10-16 2020-09-23 Baguette d'étanchéité et dispositif d'étanchéité

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Country Link
US (1) US20220333306A1 (fr)
EP (2) EP4253650A3 (fr)
CN (1) CN114555883A (fr)
DE (1) DE102019127850A1 (fr)
WO (1) WO2021073845A1 (fr)

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CN114555883A (zh) 2022-05-27
EP4253650A2 (fr) 2023-10-04
US20220333306A1 (en) 2022-10-20
EP4253650A3 (fr) 2024-01-10
WO2021073845A1 (fr) 2021-04-22

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