US20190264840A1 - Hose line for transporting abrasive media and method and device for production thereof - Google Patents

Hose line for transporting abrasive media and method and device for production thereof Download PDF

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Publication number
US20190264840A1
US20190264840A1 US16/317,733 US201716317733A US2019264840A1 US 20190264840 A1 US20190264840 A1 US 20190264840A1 US 201716317733 A US201716317733 A US 201716317733A US 2019264840 A1 US2019264840 A1 US 2019264840A1
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US
United States
Prior art keywords
hose
reinforcing element
electrically conducting
material web
hose line
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Abandoned
Application number
US16/317,733
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English (en)
Inventor
Stefan Nüßen
Tanja Kapteina
Joachim Jacobi
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Masterflex SE
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Masterflex SE
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Application filed by Masterflex SE filed Critical Masterflex SE
Assigned to MASTERFLEX SE reassignment MASTERFLEX SE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Jacobi, Joachim, Kapteina, Tanja, Nüßen, Stefan
Publication of US20190264840A1 publication Critical patent/US20190264840A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F16L11/118—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having arrangements for particular purposes, e.g. electrically conducting
    • F16L11/1185—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having arrangements for particular purposes, e.g. electrically conducting electrically conducting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/304—Extrusion nozzles or dies specially adapted for bringing together components, e.g. melts within the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/78—Winding and joining, e.g. winding spirally helically using profiled sheets or strips
    • B29C53/785—Winding and joining, e.g. winding spirally helically using profiled sheets or strips with reinforcements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F16L11/112—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having reinforcements embedded in the wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/127—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting electrically conducting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/24—Hoses, i.e. flexible pipes wound from strips or bands
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/165—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means by means of cables or similar elongated devices, e.g. tapes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2701/00—Use of unspecified macromolecular compounds for preformed parts, e.g. for inserts
    • B29K2701/12—Thermoplastic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0005—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/005—Hoses, i.e. flexible

Definitions

  • the invention relates to a hose line for transporting abrasive media with an electrically conductive reinforcing element running in or on the hose wall and extending in the hose direction. Furthermore, the invention relates to a method and a device for the production thereof.
  • hose lines used for this are often exposed to high stresses because the transported medium can cause substantial abrasion of the inner side of the hose wall. After a certain period of time this results in damage to the hose wall. As a consequence, leakage from the hose line can result. Often it is also required that the hose lines are accompanied by a certain degree of flexibility, which has the result that the lines are also exposed to frequent bending loads.
  • hose lines with a helically or spirally running reinforcing coil which combine high flexibility and resistance are known in particular. These are in particular extruded plastic profiles with spring steel wire moulded in so as to be rotatably and slidably fixed.
  • the object of the present invention is therefore to provide a hose line which makes it possible to identify wear of the hose line early enough before a leak occurs.
  • an insert made of electrically conducting material is at least partially embedded in the hose wall and extends in the hose direction at a distance from the reinforcing element.
  • the insert made of electrically conducting material forms an electrical conductor which extends in the hose direction or in the longitudinal direction of the hose at a distance from the reinforcing element, with the result that the insert and the reinforcing element are not electrically connected to each other, or are electrically isolated from each other.
  • both the reinforcing element and the insert are electrically conducting, they can be integrated into a monitoring circuit. In such a monitoring system, after the hose line has been laid, the first end of the hose line and the first end of the insert are connected to an electrical ohmmeter or continuity tester.
  • the reinforcing element and the insert are electrically connected to each other at the second end or on any other section in order to close the electric circuit.
  • the reinforcing element and the insert can be electrically connected to each other at the second end by a clamp, a contact shoe or another contact element, such as an electrically conductive rivet.
  • a pin can be pushed into the hose line, in particular into the electrically conducting material, and then an electrical connection between the pin and the reinforcing element (for example through a wire or a cable) can be produced.
  • An electrically conducting adhesive strip is also possible.
  • the electrical resistance measured also changes, which can be registered and indicated by the ohmmeter. Users thus receive a message about the state of the hose line in good time and can take appropriate countermeasures. A break in the electrical connection can also be easily detected using a continuity tester or a continuity meter.
  • the reinforcing element can be completely embedded in the hose wall, with the result that it is separated from the hose interior and the hose exterior by the hose wall. It is also possible for the reinforcing element to be only partially embedded in the hose wall and for a section of the reinforcing element to be exposed towards the hose interior or hose exterior.
  • the insert made of electrically conducting material can also be embedded in the hose wall such that the hose wall completely surrounds the insert. However, it is also possible for the insert to be only partially accommodated by the hose wall and, for example, for an inner section of the insert to be exposed towards the hose interior. For this, the insert can also be fixed on the inner side of the hose wall.
  • the electrically conducting material and/or the reinforcing element are separated from the hose interior by a wearing layer.
  • the wearing layer can be part of the insert and/or be formed by a section of the hose wall. Through the choice of the thickness of the wearing layer, a predetermined degree of wear and tear can be established at which the wear warning function is to become active.
  • the hose wall In principle it is possible for the hose wall to consist of several plies or layers in a sandwich construction. For this, several film layers can be laid one over another.
  • the electrically conducting material can be arranged between two of the plies.
  • the electrically conducting material is advantageously separated from the inner side of the hose by one or more layers or by a wearing layer of its own. Equally, the electrically conducting material can be attached to the inner side of the hose.
  • the reinforcing element can likewise be arranged between two layers. However, it is also possible to fix, for example weld, the reinforcing element to the outer side or inner side of the layer assembly.
  • the hose line preferably consists of thermoplastic.
  • thermoplastic elastomers based on urethane (TPU), i.e. polyurethane (PU), such as e.g. polyether polyurethane and polyester polyurethane, polyvinyl chloride (PVC) or polyethylene (PE), but also thermoplastic vulcanizates (TPV), such as Santoprene.
  • TPU urethane
  • PU polyurethane
  • PVC polyether polyurethane
  • PE polyethylene
  • TPV thermoplastic vulcanizates
  • suitable materials are in particular thermoplastic elastomers, such as:
  • the hose line has a helically or spirally running material web which forms the hose wall or at least a layer thereof, as well as a helically or spirally running reinforcing element which is secured on or in the hose wall.
  • the material web, which is coiled to form the hose line, is preferably an extruded profiled rim made of thermoplastic.
  • Such hose lines with helically running reinforcing coil can be produced in such a way that a material web on which the reinforcing coil is secured is wound in the form of a spiral.
  • a known method provides that a material web extruded as a profiled rim is wound around a manufacturing mandrel or the like and the part of the web already wound onto the manufacturing mandrel is pulled off it axially, with the result that the web is wound helically.
  • the edge area of the web section newly impinging on the manufacturing mandrel is connected to the edge area of the web section which has already looped around the mandrel once. In this way it is possible to form a hose line which is provided with a helically running reinforcing element.
  • the longitudinal edge sections of neighbouring coil turns or the opposing edge areas of the material web can be connected to each other in an overlapping manner.
  • a film strip can also be provided as material web, wherein the film strip is coiled in such a way that neighbouring edge areas overlap.
  • the overlapping edge areas are preferably connected to each other by welding.
  • the electrically conducting material can extend axially parallel to the hose axis.
  • the electrically conducting material extends helically or spirally in the hose direction.
  • the reinforcing element extends substantially parallel to the electrically conducting material in the hose direction or along the hose axis, wherein a substantially constant distance between the two electrical conductors, i.e. the insert and the reinforcing element, is preserved.
  • a particularly preferred embodiment provides a helically running reinforcing element, wherein the electrically conducting material likewise extends helically in the hose direction.
  • the two helices can run parallel to each other, for example in the radial direction, wherein one helix surrounds the other helix.
  • a further embodiment provides that the helically running reinforcing element and the helically running electrically conducting material are axially offset relative to each other, with the result that in a top view onto the hose axis the helix of one element runs between neighbouring turns of the other element.
  • the helices can run with a radial offset to each other or have substantially the same distance from the hose axis, with the result that they extend in the manner of a double helix or double coil with parallel spirals in the hose direction. In this way particularly reliable measurement results for the electrical resistance and thus a particularly reliable wear warning and/or breakage warning can be achieved.
  • the reinforcing element is preferably a wire or a wire spiral, such as e.g. a spring steel wire.
  • the wire or the wire spiral can be sheathed by or coated with a plastic in order to make it easier to attach the reinforcing element to the hose line by means of welding, e.g. in the production of hose lines with support coil fitted on.
  • the reinforcing element comprises an electrically conductive plastic instead of the wire or the wire spiral.
  • thermoplastics which can be electrically conductively equipped are suitable, such as is described further below in connection with the insert made of electrically conductive material.
  • Rigid polymers such as e.g. polyamide (PA), polypropylene (PP) or rigid PVC, are preferred.
  • the electrically conducting material can comprise a metal wire and/or electrically conductive plastic.
  • suitable materials also come into consideration, if they have the necessary electrical conductivity.
  • a wire strand embedded in the hose wall has proved to be an economical and efficient solution. If abrasion of the wearing layer located under the strand results during use of the hose line, the strand becomes increasingly exposed. The individual conductors of the strand are then separated in a short period of time by the transported medium, whereby the electrical continuity through the strand and the reinforcing element is interrupted. The ohmmeter registers a change in the electrical resistance and is set up to output a warning about this. The same applies to a breakage of the reinforcing element or of the electrical conductor. This can also be easily detected with a continuity meter.
  • an electrically conductive plastic can also be used.
  • So-called conductive polymers are plastics with electrical conductivity which is comparable to that of metals.
  • the electrical conductivity of plastics such as e.g. PE, PU or PVC, can be modified for example by compounding, in which additives, such as carbon fibres, graphite, metal powder, carbon nanotubes or steel fibres are added to the plastic melt. It is therefore possible to provide substantially the same plastic for the wall of the hose line and for the electrically conducting insert, wherein the wall and the insert differ only with respect to the electrical conductivity if corresponding additives are added to the insert.
  • the insert and the hose wall consist of the same plastic type, which is advantageous with respect to the adhesion between the two plastics.
  • a further embodiment of the invention provides that the electrically conducting material lies closer to the hose axis or closer to the hose inner wall in the radial direction than the reinforcing element.
  • the increasing abrasion of the inner hose wall has an effect on the electrically conducting material first, before the reinforcing element of the hose line is damaged.
  • Such an arrangement offers the particular advantage that after a wear warning which is triggered by a complete or partial separation of the electrically conducting material of the insert the hose line can still continue to be used for a certain time before failure of the hose line (leakage) results.
  • the electrically conducting material lies between the reinforcing element and the hose interior or the hose longitudinal axis in the radial direction.
  • the reinforcing element and the electrically conducting material are separated from each other by an isolating layer.
  • an isolating layer ensure the functional reliability of the electric circuit, but the duration of the above-described time buffer can also be controlled via the thickness of the isolating layer.
  • the method according to the invention for producing a material web for a hose line made of thermoplastic for abrasive media provides that a plastic melt is fed into an extrusion head to form an extruded material web and an electrically conductive reinforcing element is connected to the material web during the extrusion of the material web.
  • an electrically conducting material is fed into the extrusion head to form an insert in the material web and introduced into the material web at a defined distance from the reinforcing element during the extrusion of the material web.
  • the reinforcing element and the insert can be embedded in the material web completely or only partially.
  • a further embodiment of the invention provides that the insert consists of electrically conductive thermoplastic, wherein the material web and the insert are brought together by coextrusion.
  • the properties of the plastic can be modified by compounding.
  • a further extruder is used in addition to the main extruder, with the result that at least two plastic melts are brought together before leaving the extrusion device or a profiled template.
  • the two extrudates are fed into the extrusion head and pressed through the die or the template by the pressure of the emerging materials.
  • the insertion of the electrically conductive plastic into the material web is effected at a predefined point. The result is for example a material web with an electrically conductive strip.
  • the electrical conductor consists of metal wire, preferably of a strand.
  • the strand is guided into the extrusion head, and the extrudate is at least partially extruded onto the strand.
  • This method for producing a hose line for abrasive media provides that an already extruded material web made of thermoplastic is wound helically to form a hose line and neighbouring longitudinal edge sections of the material web are connected to each other, e.g. by welding, in an overlapping manner and an electrically conductive reinforcing element is connected to the plastic in such a way that the reinforcing element extends helically in the hose direction.
  • an electrically conducting material is attached to the hose line in such a way that it extends in the hose direction at a distance from the reinforcing element, wherein at least one of the reinforcing element and the electrically conducting material is attached to the extruded material web, thus after the extrusion thereof.
  • the reinforcing element e.g. the wire spiral described herein
  • the reinforcing element can be wound on spirally or helically with the plastic web, wherein the reinforcing element is laid between overlapping longitudinal edge sections of the material web and is fixed there by connection of the longitudinal edge sections.
  • the reinforcing element here is located directly between sections of the material webs adjoining each other in the manner of a pocket and no additional fixing of the reinforcing element, for example by welding it on, is required.
  • the process with the electrically conducting material can be the same.
  • the reinforcing element preferably a coated wire
  • the material web can be wound helically to form a hose line and neighbouring longitudinal edge sections of the material web can be connected to each other in an overlapping manner, as described above, wherein the reinforcing element is welded onto the already connected hose sections or onto other sections of the hose line.
  • the process with the electrically conducting material can be the same.
  • one of the reinforcing element and the electrically conducting material can be connected to the material web during the extrusion thereof, for example can be at least partially embedded in it, and the other of the reinforcing element and the electrically conducting material can be attached to the extruded material web.
  • the electrically conducting material can be introduced directly into the material web for example as part of the extrusion thereof, as described above, whereas the reinforcing element is not connected to the material web until after the extrusion. This procedure can of course also be reversed.
  • the hose line is formed of several plastic layers or plies at least in sections, wherein the reinforcing element and/or the electrically conducting material is at least partially introduced between two adjoining plastic layers.
  • the invention furthermore relates to a device for producing hose lines made of thermoplastic with a reinforcing element at least partially embedded in the hose wall, in particular for producing hose lines such as are described herein, in particular by means of a method according to the first aspect such as is described herein.
  • the device comprises an extrusion head for extruding a material web, wherein the extrusion head has at least one feed channel for flowable plastic from at least one extruder, wherein the reinforcing element is guided into the extrusion head in order to at least partially embed the reinforcing element in the plastic during the extrusion of the material web.
  • a first guide section is set up to guide the reinforcing element in and/or into the extrusion head, with the result that the reinforcing element is integrated into the plastic in a defined or predetermined position.
  • a further, second guide section for an electrical conductor (insert), such as a wire strand or the like, is provided.
  • the electrical conductor is fed into the extrusion head in order to be at least partially embedded in the plastic.
  • the second guide section is formed in such a way that the electrical conductor is embedded in the plastic at a defined distance from the reinforcing element along the material web.
  • a further embodiment of the invention provides that the first and second guide sections comprise ducts, preferably arranged parallel to each other, for the reinforcing element and the electrical conductor.
  • the guide sections can be guided into the extruder for example through two ducts in an entry guide in the manner of a double tube.
  • the guide sections are arranged in such a way that the reinforcing element and the electrical conductor are held at a predetermined distance from each other when they are embedded in the plastic.
  • the material web is extruded as a profiled rim.
  • a profiled template is provided which is part of the extrusion head or is attached thereto.
  • the invention furthermore relates to the use of a hose line for abrasive media, such as is described herein, in a monitoring system for monitoring the state, in particular the wear, of a hose line, wherein a first end of the reinforcing element and a first end of the insert made of electrically conducting material are connected to an electrical ohmmeter or continuity tester at a first end of the hose line and wherein the reinforcing element and the insert are electrically connected to each other at the second end of the hose line or on another section of the hose line.
  • an electric circuit is closed.
  • the reinforcing element, the ohmmeter or continuity tester and the insert are integrated into an electric circuit.
  • the electrical resistance measured also changes, which can be registered and indicated by the ohmmeter or the continuity tester.
  • clamps, contact shoes, rivets, pins or electrically conducting adhesive strips are suitable as connection elements for producing an electrical connection between the reinforcing element and the insert.
  • other contact elements which are suitable for an electrically conducting connection between the reinforcing element and the insert can also be used.
  • the invention relates to a monitoring system for monitoring the state, in particular the wear, of a hose line.
  • the system comprises a hose line for abrasive media, such as is described herein, as well as an electrical ohmmeter or continuity tester, wherein a first end of the reinforcing element and a first end of the insert made of electrically conducting material are connected to the electrical ohmmeter or continuity tester at a first end of the hose line and wherein the reinforcing element and the insert are electrically connected to each other at the second end of the hose line or on another section of the hose line.
  • an electric circuit is closed.
  • the monitoring system can in principle be formed as a system for wear warning in a hose line.
  • FIG. 1 a hose line according to a first embodiment of the invention in a sectional view
  • FIG. 2 a diagram of the monitoring of a hose line according to a second embodiment of the invention
  • FIG. 3 a hose line according to a third embodiment of the invention in a sectional view
  • FIG. 4 a device according to the invention in a sectional view.
  • FIG. 1 shows a section of a hose line 1 or of a hose with a hose wall 2 which surrounds the hose interior 3 .
  • the hose line 1 has a helically running material web 4 , which forms the hose wall 2 .
  • the material web 4 is a spirally coiled extruded profiled rim with embedded reinforcing element 5 in the form of a wire spiral, which likewise extends helically in the hose direction or in the longitudinal direction 6 of the hose line 1 .
  • the reinforcing element 5 is electrically conducting.
  • An insert 7 made of electrically conducting material in the form of a wire strand is likewise embedded in the hose wall 2 .
  • the strand 7 lies closer to the hose inner wall 8 or to the hose longitudinal axis in the radial direction R than the reinforcing element 5 .
  • the insert 7 follows the course of the reinforcing element 5 at a distance 9 in parallel and extends helically around the hose longitudinal axis in the longitudinal direction of the hose.
  • Hoses of the type represented are used in particular for transporting abrasive media. If necessary, the hose can be cut to the desired length. As a result of wear the thickness of the hose wall 2 can decrease, resulting in leakage. Also, in the course of the laying or during dynamic movement in operation, such hoses can be exposed to stresses from the outside, such as for example bending stresses. A breakage of the hose line and in particular of the reinforcing coil can result. Regarding this, FIG. 2 shows a system for wear warning in the case of a hose line according to the invention.
  • the hose line 1 represented here is shortened to the desired size and, like the hose line in FIG. 1 , has a helically running material web and a correspondingly running reinforcing element 5 .
  • the insert 7 runs parallel to the longitudinal axis 10 of the hose line 1 .
  • the left-hand end of the hose wall 2 is exposed.
  • the end of the reinforcing element 5 and the end of the insert 7 are connected to an ohmmeter 11 .
  • the reinforcing element 5 and the insert 7 are electrically connected to each other.
  • an electrically conducting clamp 13 is secured to the end of the hose line 1 , with the result that the clamp 13 comes into contact with the reinforcing element 5 and with the insert 7 and closes the electric circuit.
  • a pin can also be pushed into e.g. the front end of the insert 7 and then connected to the reinforcing element 5 e.g. via a small cable.
  • the section of the wall between the hose interior 3 and the insert 7 acts as a wearing layer 12 . If, as a result of wear, there is a reduction in the wall thickness of the hose wall 2 , the insert 7 , which is formed in the form of a wire strand, is exposed first, before the reinforcing element 5 is damaged. As a result of further abrasion, individual conductors of the strand are separated, whereby the measured electrical resistance changes. This can be indicated by the ohmmeter 11 . The user thus receives an early warning of an impending leakage.
  • the material layer between the reinforcing element 5 and the insert 7 effectively acts as a time buffer.
  • a corresponding response is likewise received.
  • other electrically conducting means for electrically connecting the reinforcing element to the insert are also possible.
  • an electrically conducting adhesive strip or the like can be attached, which connects the ends of the reinforcing element 5 and the insert 7 to each other in an electrically conducting manner.
  • the hose line 1 in FIG. 3 is constructed substantially the same as the hose line from FIG. 1 .
  • the insert 7 consists of an electrically conducting material in the form of extruded plastic which has been coextruded together with the material web 4 and in the process has been introduced into the material web 4 .
  • the plastic of the insert 7 corresponds substantially to that of the hose wall 2 or of the material web 4 , but has been modified with respect to its electrical conductivity by the addition of additives. If, as a result of increasing wear, there is damage to the insert, the measured resistance of the already discussed electric circuit also changes here and allows a conclusion to be drawn as to the state of the hose line 1 .
  • FIG. 4 shows a device 14 for extruding plastic in the form of an extrusion head with a profiled template 15 .
  • the extrusion head 14 has an inlet 16 for an extrudate in the form of molten plastic, which is provided by an extruder 17 .
  • a channel 18 passes through the extrusion head 14 .
  • the extrudate flows through the channel 18 , is fed into the profiled template 15 and moulded to form a profiled rim.
  • the reinforcing element 5 is also to be embedded in the extruded material web.
  • the reinforcing element 5 here a wire
  • the reinforcing element 5 is guided into the channel 18 of the extrusion head 14 and surrounded by the extrudate, with the result that the reinforcing element 5 is embedded in the extruded plastic after leaving the profiled template 15 .
  • the correct position of the reinforcing element 5 in the extruded material web or in the channel 18 , where the reinforcing element 5 is melted into the plastic, is ensured by a first guide section 19 .
  • An electrical conductor or an insert 7 made of electrically conducting material is to be embedded in the material web likewise and in a defined position relative to the reinforcing element 5 .
  • the electrical conductor 7 comprises a wire strand, which is guided parallel to the reinforcing element 5 into the extrusion head 14 and melted into the plastic.
  • the position of the insert 7 relative to the reinforcing element 5 is ensured by a second guide section 20 , which guides the insert 7 parallel to the reinforcing element 5 .
  • the first guide section 19 and the second guide section 20 are formed by two passages in a sheath-like element 21 .
  • the sheath-like element 21 has the form of a double tube.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US16/317,733 2016-07-14 2017-07-12 Hose line for transporting abrasive media and method and device for production thereof Abandoned US20190264840A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP16179469.8 2016-07-14
EP16179469.8A EP3270025A1 (de) 2016-07-14 2016-07-14 Schlauchleitung für den transport abrasiver medien sowie verfahren und vorrichtung zu deren herstellung
PCT/EP2017/067567 WO2018011273A1 (de) 2016-07-14 2017-07-12 Schlauchleitung für den transport abrasiver medien sowie verfahren und vorrichtung zu deren herstellung

Related Parent Applications (1)

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PCT/EP2017/067567 A-371-Of-International WO2018011273A1 (de) 2016-07-14 2017-07-12 Schlauchleitung für den transport abrasiver medien sowie verfahren und vorrichtung zu deren herstellung

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US17/220,704 Continuation US11846372B2 (en) 2016-07-14 2021-04-01 Hose line for transporting abrasive media and method and device for production thereof

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US20190264840A1 true US20190264840A1 (en) 2019-08-29

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US16/317,733 Abandoned US20190264840A1 (en) 2016-07-14 2017-07-12 Hose line for transporting abrasive media and method and device for production thereof
US17/220,704 Active 2038-03-02 US11846372B2 (en) 2016-07-14 2021-04-01 Hose line for transporting abrasive media and method and device for production thereof

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US17/220,704 Active 2038-03-02 US11846372B2 (en) 2016-07-14 2021-04-01 Hose line for transporting abrasive media and method and device for production thereof

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US (2) US20190264840A1 (zh)
EP (2) EP3270025A1 (zh)
CN (1) CN109790947B (zh)
ES (1) ES2877479T3 (zh)
PL (1) PL3485190T3 (zh)
WO (1) WO2018011273A1 (zh)

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US11859736B2 (en) * 2019-04-12 2024-01-02 Toyox Co., Ltd. Antistatic flexible hose

Also Published As

Publication number Publication date
EP3270025A1 (de) 2018-01-17
EP3485190A1 (de) 2019-05-22
WO2018011273A1 (de) 2018-01-18
CN109790947A (zh) 2019-05-21
US11846372B2 (en) 2023-12-19
EP3485190B1 (de) 2021-05-05
ES2877479T3 (es) 2021-11-16
PL3485190T3 (pl) 2021-11-02
CN109790947B (zh) 2022-05-03
US20210239240A1 (en) 2021-08-05

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