EP3688358A1 - Tube for air distribution systems - Google Patents
Tube for air distribution systemsInfo
- Publication number
- EP3688358A1 EP3688358A1 EP18786404.6A EP18786404A EP3688358A1 EP 3688358 A1 EP3688358 A1 EP 3688358A1 EP 18786404 A EP18786404 A EP 18786404A EP 3688358 A1 EP3688358 A1 EP 3688358A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- pipe
- corrugation
- tube
- foam material
- 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- Withdrawn
Links
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G29/00—Supports, holders, or containers for household use, not provided for in groups A47G1/00-A47G27/00 or A47G33/00
- A47G29/12—Mail or newspaper receptacles, e.g. letter-boxes; Openings in doors or the like for delivering mail or newspapers
- A47G29/1201—Letter-box assemblies for apartment buildings
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G29/00—Supports, holders, or containers for household use, not provided for in groups A47G1/00-A47G27/00 or A47G33/00
- A47G29/12—Mail or newspaper receptacles, e.g. letter-boxes; Openings in doors or the like for delivering mail or newspapers
- A47G29/122—Parts, details, or accessories, e.g. signalling devices, lamps, devices for leaving messages
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G29/00—Supports, holders, or containers for household use, not provided for in groups A47G1/00-A47G27/00 or A47G33/00
- A47G29/12—Mail or newspaper receptacles, e.g. letter-boxes; Openings in doors or the like for delivering mail or newspapers
- A47G29/122—Parts, details, or accessories, e.g. signalling devices, lamps, devices for leaving messages
- A47G29/1225—Signalling devices
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G29/00—Supports, holders, or containers for household use, not provided for in groups A47G1/00-A47G27/00 or A47G33/00
- A47G29/14—Deposit receptacles for food, e.g. breakfast, milk, or large parcels; Similar receptacles for food or large parcels with appliances for preventing unauthorised removal of the deposited articles, i.e. food or large parcels
- A47G29/141—Deposit receptacles for food, e.g. breakfast, milk, or large parcels; Similar receptacles for food or large parcels with appliances for preventing unauthorised removal of the deposited articles, i.e. food or large parcels comprising electronically controlled locking means
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- 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
- F16L11/111—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall with homogeneous 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
- F16L11/11—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
- F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
- F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
-
- 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
- F16L11/20—Double-walled hoses, i.e. two concentric hoses
-
- 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
- F16L11/26—Hoses, i.e. flexible pipes made of sound-absorbing materials or with sound-absorbing structure
-
- 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
- F16L9/00—Rigid pipes
- F16L9/003—Rigid pipes with a rectangular cross-section
-
- 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
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/127—Rigid pipes of plastics with or without reinforcement the walls consisting of a single layer
- F16L9/128—Reinforced pipes
-
- 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
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
-
- 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
- F16L9/00—Rigid pipes
- F16L9/21—Rigid pipes made of sound-absorbing materials or with sound-absorbing structure
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G29/00—Supports, holders, or containers for household use, not provided for in groups A47G1/00-A47G27/00 or A47G33/00
- A47G29/12—Mail or newspaper receptacles, e.g. letter-boxes; Openings in doors or the like for delivering mail or newspapers
- A47G29/122—Parts, details, or accessories, e.g. signalling devices, lamps, devices for leaving messages
- A47G29/1225—Signalling devices
- A47G2029/1228—Signalling devices activated by the weight of the letter
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G29/00—Supports, holders, or containers for household use, not provided for in groups A47G1/00-A47G27/00 or A47G33/00
- A47G29/14—Deposit receptacles for food, e.g. breakfast, milk, or large parcels; Similar receptacles for food or large parcels with appliances for preventing unauthorised removal of the deposited articles, i.e. food or large parcels
- A47G29/141—Deposit receptacles for food, e.g. breakfast, milk, or large parcels; Similar receptacles for food or large parcels with appliances for preventing unauthorised removal of the deposited articles, i.e. food or large parcels comprising electronically controlled locking means
- A47G2029/146—Deposit receptacles for food, e.g. breakfast, milk, or large parcels; Similar receptacles for food or large parcels with appliances for preventing unauthorised removal of the deposited articles, i.e. food or large parcels comprising electronically controlled locking means the receptacle comprising identification means, e.g. a bar code
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G29/00—Supports, holders, or containers for household use, not provided for in groups A47G1/00-A47G27/00 or A47G33/00
- A47G29/14—Deposit receptacles for food, e.g. breakfast, milk, or large parcels; Similar receptacles for food or large parcels with appliances for preventing unauthorised removal of the deposited articles, i.e. food or large parcels
- A47G29/141—Deposit receptacles for food, e.g. breakfast, milk, or large parcels; Similar receptacles for food or large parcels with appliances for preventing unauthorised removal of the deposited articles, i.e. food or large parcels comprising electronically controlled locking means
- A47G2029/148—Deposit receptacles for food, e.g. breakfast, milk, or large parcels; Similar receptacles for food or large parcels with appliances for preventing unauthorised removal of the deposited articles, i.e. food or large parcels comprising electronically controlled locking means the receptacle comprising a letter box
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G29/00—Supports, holders, or containers for household use, not provided for in groups A47G1/00-A47G27/00 or A47G33/00
- A47G29/14—Deposit receptacles for food, e.g. breakfast, milk, or large parcels; Similar receptacles for food or large parcels with appliances for preventing unauthorised removal of the deposited articles, i.e. food or large parcels
- A47G29/141—Deposit receptacles for food, e.g. breakfast, milk, or large parcels; Similar receptacles for food or large parcels with appliances for preventing unauthorised removal of the deposited articles, i.e. food or large parcels comprising electronically controlled locking means
- A47G2029/149—Deposit receptacles for food, e.g. breakfast, milk, or large parcels; Similar receptacles for food or large parcels with appliances for preventing unauthorised removal of the deposited articles, i.e. food or large parcels comprising electronically controlled locking means with central server link
Definitions
- the invention relates to a pipe, in particular for an air distribution system in buildings or parts thereof, with an inner wall, an outer wall surrounding the inner wall and a space between the inner wall and the outer wall.
- Such pipes are known.
- the intermediate space is used in particular for heat and sound insulation.
- the inner wall of the tube and the outer wall of the tube touch one another at selected locations which are spaced apart from one another along the axial direction and / or along the circumferential direction of the tube.
- Such a pipe is e.g. known from EP1724508A1.
- the invention has for its object in a tube of the beginning
- Air distribution system in buildings or parts thereof, with an inner wall, an outer wall surrounding the inner wall and a space between the inner wall and the outer wall, the space according to the invention being filled at least in partial areas with a sound-absorbing material.
- the filling of sound-absorbing material reduces the propagation of sound (“structure-borne sound”) in the axial direction, ie along the longitudinal direction of the pipe, and in the radial direction, ie across the longitudinal direction of the pipe.
- the sound-absorbing material preferably fills the entire space. This achieves maximum sound absorption along the axial and radial directions.
- Tube which are different along the axial direction. Filling the space with the sound absorbing material and / or
- Sound-absorbing properties of the material can be variable, in particular periodically, along the axial direction. In particular, areas with and without sound-absorbing material can alternate along the axial direction.
- the outer wall is preferably designed as a corrugated tube with wave crests and wave troughs extending along the circumferential direction. This will make it easier to bend the pipe.
- the inner wall is preferably designed as a corrugated tube with wave crests and wave troughs extending along the circumferential direction. This will make it easier to bend the pipe.
- the sound-absorbing material has a foam material. This results in a strong sound absorption in the axial and radial directions with a low pipe weight.
- the outer wall preferably contains a polymer material.
- the inner wall preferably contains a polymer material.
- the foam material can have a polymer, in particular an elastomer.
- a polymer in particular an elastomer.
- the use of an elastomer foam ensures that the pipe can be bent easily.
- the tube can extend from the inner wall to the one in the intermediate space
- the spacer preferably has a higher rigidity in the radial direction of the tube than in the axial direction of the tube. This ensures that the pipe can be bent with a relatively small amount of force (pair of forces), while a large amount of force is required to squeeze the pipe, i.e. reduce its cross-sectional area.
- the spacer is designed as a corrugated tube with wave crests and wave troughs extending along the circumferential direction. This reduces the effort required when bending the tube, since the corrugated tube can be stretched on the outside of the bend with relatively little axial tensile force and can be compressed on the inside of the bend with relatively little axial compressive force.
- Wave crests and wave troughs of the outer wall as well as wave crests and wave troughs of the spacer are located at the same locations along the axial direction of the tube.
- the corrugations W2 of the inner wall, W4 of the outer wall and W6 of the spacer are therefore in phase.
- the corrugation W2 of the inner wall and the corrugation W4 of the outer wall preferably each have a smaller amplitude A2 or A4 than the amplitude A6 of the corrugation W6 of the spacer, that is to say A2 ⁇ A6 and A4 ⁇ A6. This will make the
- the inner wall and the outer wall preferably each have a smaller wall thickness D2 or D4 than the wall thickness D6 of the spacer, ie D2 ⁇ D6 and D4 ⁇ D6. This contributes to the easier bendability of the pipe.
- the corrugation W2 of the inner wall and / or the corrugation W4 of the outer wall can have a smaller wavelength L2 or L4 than the wavelength L6 of the Corrugation W6 of the spacer in the axial direction of the tube, i.e. L2 ⁇ L6 and L4 ⁇ L6.
- the spacer can have a wall thickness D6 of 0.2 mm to 3 mm and
- the spaces between the inner wall, the outer wall and the spacer are preferably foamed with the sound-absorbing material, in particular with melamine resin.
- the spacer is preferably designed as a helical (helical) web which extends coaxially to the inner wall and to the outer wall along the axial direction in the intermediate space. This also has manufacturing advantages.
- Outer wall are located at the same locations along the axial direction of the tube, and on the other hand troughs of the inner wall and wave crests of the outer wall are located at the same locations along the axial direction of the tube.
- the corrugations W2 of the inner wall and the corrugations W4 of the outer wall are therefore in phase opposition. This helps ease the effort of bending the tube.
- Outer wall protrude into the space between the helical web and, on the other hand, wave troughs of the inner wall extend along a radially inner side of the helical web and wave crests of the outer wall extend along a radially outer side of the helical web.
- helical ridges each convex and protrude into the troughs of the inner wall or into the wave crests of the outer wall.
- the spacer can have a thickness of 0.2 mm to 5 mm and preferably 1 mm to 3 mm.
- the spacer preferably contains a polymer material.
- the spacer can also have mineral fibers and / or metal fibers.
- the space between the one formed as a corrugated tube is preferably
- Outer wall and the inner wall are foamed with a foam material which has a course W3 which fluctuates periodically along the axial direction
- the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the foam material with the radially inner surface of the
- the foam material is preferably integrally connected to the radially outer surface of the inner wall, in particular glued and / or welded.
- the foam material preferably has a periodically fluctuating course W3 * of the foam material flute (modulus of elasticity) along the axial direction. This contributes to the easier bendability of the pipe.
- the courses W3 and W3 * can be in phase, ie maxima W3 * a and minima W3 * b of the course W3 * of the foam material flute Fl and maxima W3a and Minima W3b of the course W3 of the foam material wall thickness D3 are in the same places along the axial direction of the tube.
- the curves W3 and W3 * can be in phase opposition, ie that the minimums W3 * b and the maximums W3 * a of the curve W3 * of the foam material flute Fl and Maxima W3a and minimums W3b of the curve W3 of the foam material wall thickness D3 are in the same locations along the axial direction of the tube.
- the periodically fluctuating course W3 * of the foam material hardness and / or the periodically fluctuating course W3 of the foam material wall thickness D3 can have a smaller wavelength L3 * or L3 than the wavelength L4 of the corrugation W4 of the outer wall, i.e. L3 * ⁇ L4 or L3 ⁇ L4.
- the course W3 of the foam material wall thickness D3, which fluctuates periodically along the axial direction, is preferably determined by the corrugation W4 of the outer wall. This is simple in terms of manufacturing technology.
- the course W3 of the foam material wall thickness D3, which fluctuates periodically along the axial direction, is preferably determined by a corrugation W2 of the inner wall. This is simple in terms of manufacturing technology.
- the corrugation W4 of the outer wall and the corrugation W2 of the inner wall can be in phase.
- the corrugation W4 of the outer wall and the corrugation W2 of the inner wall can be in phase opposition.
- the course W3 of the foam material wall thickness D3, which fluctuates periodically along the axial direction, is only determined by the corrugation W4 of the outer wall, i.e. the inner wall is straight,
- the inner wall and / or the outer wall is connected to a helical reinforcement which extends coaxially to the inner wall and to the outer wall along the axial direction of the tube.
- the helical reinforcement is preferably embedded in the outer wall.
- the helical reinforcement is preferably integrally connected to the radially inner surface of the outer wall and to the foam material.
- the helical reinforcement is preferably with the radially outer one
- the helical reinforcement can be a helically wound strand. This is simple in terms of manufacturing technology.
- the strand can have a rectangular cross-section, the long side LS of the rectangle being aligned parallel to the longitudinal direction of the tube, and in particular the length ratio of the long side LS to the short side KS of the rectangle being in the range from 1: 1 to 10: 1 1 ⁇ LS / KS ⁇ 10. This contributes to the stability and radial compactness of the pipe.
- the strand can have an oval cross-section, the long diagonal LD of the oval being aligned parallel to the longitudinal direction of the tube, and in particular the length ratio of the long diagonal LD to the short diagonal KD of the oval being in the range from 1: 1 to 10: 1 1 ⁇ LD / KD ⁇ 10. This contributes to the stability and radial compactness of the tube.
- the reinforcement can have polymer material and / or metal.
- the reinforcement can also have mineral fibers and / or metal fibers.
- the wall thickness D4 of the outer wall of the tube is preferably greater than the wall thickness D2 of the inner wall of the tube, ie D4> D2.
- the inner wall preferably has a wall thickness D2 of 0.05 mm to 0.3 mm and the outer wall has a wall thickness D4 of 0.2 mm to 1.2 mm. That contributes to
- the inner wall preferably has one on its radially inner surface
- Coating containing aluminum On the one hand, this contributes to the hygiene of the pipe and, on the other hand, enables the inner surface of the pipe to be grounded in order to avoid local electrostatic charging.
- the tube expediently has a circular cross section or a rectangular cross section. It can also have a polygonal cross section, in particular a hexagonal cross section.
- FIG. 1 shows a longitudinal section through the tube wall of a first embodiment of the tube according to the invention
- FIG. 2 shows a longitudinal section through the tube wall of a second embodiment of the tube according to the invention
- Fig. 3 is a side view, a longitudinal section, a cross section and a
- Fig. 4 shows a longitudinal section through the tube wall of the third embodiment of the tube according to the invention in a straight, i.e. shows not bent state of the tube;
- 5 shows a longitudinal section through the tube wall of the third embodiment of the tube according to the invention in the curved state of the tube; 6 shows a side view, a longitudinal section, a cross section and a perspective view of a fourth embodiment of the tube according to the invention;
- Fig. 7 is a longitudinal section of a fifth embodiment of the pipe according to the invention in a straight, i.e. shows not bent state of the tube;
- FIG. 8 shows a longitudinal section through the tube wall of the fifth embodiment of the tube according to the invention in the curved state of the tube;
- FIG. 9 shows a longitudinal section through the tube wall of a sixth embodiment of the tube according to the invention.
- Fig. 10 shows a first course of two pipe parameters as a function of the axial
- Fig. 1 1 shows a second course of two pipe parameters as a function of the axial
- the tube 1 shows a longitudinal section through the tube wall of a first embodiment of a tube 1 according to the invention.
- the tube 1 has an inner wall 2, an outer wall 4 surrounding the inner wall and an intermediate space 3 between the inner wall 2 and the outer wall 4.
- the intermediate space 3 is filled with a sound-absorbing material 5.
- the tube 1 contains in the intermediate space 3 a spacer 6 in the form of a corrugated tube which extends from the inner wall 2 to the outer wall 4.
- the spacer 6 has a corrugation W6 with a wavelength L6.
- the three corrugations W2, W4 and W6 run in phase here, ie the crests 2a of the inner wall 2, the crests 4a of the outer wall 4 and the wave crests 6a of the spacer 6 are at the same axial positions along the axial direction of the tube 1, while the wave troughs 2b of the inner wall 2, the wave troughs 4b of the outer wall 4 and the wave troughs 6b of the spacer 6 are at the same axial positions along the axial direction of the Tube 1 are located.
- the spacer 6 has a higher rigidity in the radial direction of the tube 1 than in the axial direction of the tube 1. This ensures that the pipe 1 can be bent with a relatively small amount of force (pair of forces), while a large amount of force is required to squeeze the pipe 1, ie to reduce its cross-sectional area.
- the pipe 1 also has one
- Inner wall 2 an outer wall 4 surrounding the inner wall and one
- Intermediate space 3 is also filled with a sound-absorbing material 5.
- the tube 1 'contains in the intermediate space 3 a spacer 7 extending from the inner wall 2 to the outer wall 4, but here in the form of a
- the spacer 7 has a pitch G.
- the outer wall 4 and the inner wall 2 have a corrugation W4 or W2 with a wavelength L4 or L2.
- the two corrugations W2 and W4 run in opposite phase here, i.e.
- the spacer 7 also has a higher rigidity in the radial direction of the pipe 1 ′′ than in the axial direction of the pipe 1 ’. This in turn ensures that the pipe 1 ’can be bent with a relatively small amount of force (pair of forces), while a large amount of force is required to squeeze the pipe 1’, i.e. reduce its cross-sectional area.
- Fig. 3 are a side view, a longitudinal section, a cross section and a
- FIG. 1 Perspective view of a third embodiment of the tube 1 ”according to the invention is shown.
- the tube 1 has an inner wall 2, one surrounding the inner wall
- the intermediate space 3 is sound-absorbing
- the outer wall 4 is a longitudinal section through the tube wall of the third embodiment of the tube 1 ”according to the invention in a straight, ie not curved, state of the tube 1 ”shown.
- the outer wall 4 is designed as a corrugated tube 4a, 4b with wave crests 4a and wave troughs 4 extending along the circumferential direction.
- the inner wall 2 in the straight state of the tube 1 has no corrugation, that is to say neither wave crests nor troughs, or only a slight corrugation in comparison to the corrugation of the outer wall 4, the wave amplitudes of which are less than 1/10 of the wave amplitudes of the corrugation the outer wall 4.
- the thickness D3, measured in the radial direction, of the intermediate space 3 filled with the sound-absorbing material 5 is periodic due to the corrugated tube 4a, 4b
- the hardness H or the modulus of elasticity of the foam material 5 can also be their minimum or their
- hardness H or modulus of elasticity means the measurable hardness or modulus of elasticity of the solid-air mixture.
- the hardness H or the modulus of elasticity of the foam material 5 can be determined by
- phase relationships between 0 and 180 ° can be selected between the course W3 and the course W3 * .
- the inner wall 2 is integrally connected to the foam material 5, that is to say glued and / or welded. As a result, the inner skin 2 follows any deformations,
- Foam material 5 When the pipe is bent 1 ”, the pipe wall is subject to compression on the inside of the pipe bend.
- Inner skin 2 a curl.
- the corrugation of the inner wall or inner skin 2 has a smaller wave amplitude than the corrugation of the outer wall 4.
- the wave amplitude of the corrugation of the inner wall or inner skin 2 is preferably less than 1/5 of the wave amplitude of the corrugation of the outer wall 4.
- FIG. 5 shows a longitudinal section through the tube wall of the third embodiment of the tube 1 ”according to the invention in the curved state of the tube 1”.
- the inner wall or inner skin 2 is very thin and is made of a material with high hardness or high modulus of elasticity, it is hardly stretchable along the axial direction of the tube 1 ”, but it is very flexible. On the one hand, this leads to the fact that on the inside of the pipe bend the in the
- the arc length of the inner wall 2 of the curved tube 1 ”measured in the axial direction is shorter than the corresponding length of the measured in the axial direction
- Arc length of the outer wall 2 of the curved pipe 1 is practically the same length as the corresponding length of the inner wall 2 measured in the axial direction in the straight state of the pipe 1".
- the inner wall or inner skin 2 on the outside of the pipe bend behaves as the neutral fiber of the bent pipe 1 ”.
- the arc length of the central bending line M inside the pipe bend is therefore shorter than the corresponding length of the central line in the straight state of the pipe 1 ”. Due to the bond between the
- Foam material 5 radially outwards, i.e. folds into the foam material 5 as shown by the folds 10 in FIG. 5.
- the inner wall corrugation the inner wall can be both lengthened and shortened along the axial direction of the tube. Now the inner wall 2 on the outside of the pipe bend does not behave as the neutral fiber of the bent pipe 1 ”. Rather, the arc length of the central or approximately central bending line M inside the pipe bend is now as long as that
- Fig. 6 are a side view, a longitudinal section, a cross section and a
- FIG. 1 * Perspective view of a fourth embodiment of the tube 1 * according to the invention is shown.
- the tube 1 * has an inner wall 2, one surrounding the inner wall
- the intermediate space 3 is sound-absorbing
- the inner wall 2 of the tube 1 * is connected to a helical or helical reinforcement T which extends coaxially to the inner wall 2 and to the outer wall 4 along the axial direction of the tube 1 * .
- the helical reinforcement T is integrally connected to the radially outer surface of the inner wall 2 and with the foam material 5, that is to say welded and / or glued.
- the helical reinforcement T contributes to the dimensional stability of the pipe 1 * . Similar to the spacer 6 mentioned above in the second embodiment, the reinforcement T has a higher rigidity in the radial direction of the tube 1 * than in the axial direction of the tube 1 * . This ensures that the tube 1 * with a relatively small effort
- FIG. 7 shows a longitudinal section of a fifth embodiment of the pipe 1 ** according to the invention in the straight, ie non-curved state of the pipe 1 ** .
- the pipe 1 ** has an inner wall 2, an outer wall 4 surrounding the inner wall and an intermediate space 3 between the inner wall 2 and the outer wall 4.
- the intermediate space 3 is filled with a sound-absorbing foam material 5.
- the outer wall 4 of the pipe 1 ** is connected to a helical or helical reinforcement T which extends coaxially to the inner wall 2 and to the outer wall 4 along the axial direction of the pipe 1 ** .
- the helical reinforcement T is a helically wound strand 7 'which is embedded in the outer wall 4. Between the helically wound strand T, the outer wall 4 has a helical crest 4a. in the
- the inner wall 2 in the straight state of the pipe 1 ** has no corrugation, that is to say neither wave crests nor troughs.
- the reinforcement T has a higher rigidity in the radial direction of the tube 1 * than in the axial direction of the tube 1 * . This ensures that the pipe 1 ** can be bent with a relatively small amount of force (pair of forces) while it is high effort required to squeeze the pipe 1 ** , ie to reduce its cross-sectional area.
- the inner wall 2 has a corrugation.
- FIG. 8 shows a longitudinal section through the tube wall of the fifth embodiment of the tube 1 ** according to the invention in the curved state of the tube 1 ** .
- the tube wall compressed or compressed due to the tube curvature can be seen on the inside of the tube curve.
- the inner wall 2 is very thin and is made of a material with great hardness or high modulus of elasticity, the inner wall 2 is hardly stretchable along the axial direction of the tube 1 ** , but it is very flexible. Similar to the third embodiment in FIG.
- the inner wall 2 on the outside of the pipe bend behaves as the neutral fiber or neutral surface of the bent pipe 1 ** .
- the arc length of the central bending line or bending surface M in the interior of the pipe bend is therefore shorter than the corresponding length of the central line in the straight state of the pipe 1 ”(FIG. 7). Due to the material bond between the inner wall 2 and the foam material 5 and because of the high flexibility of the inner wall 2, this can follow any deformation of the foam material 5.
- the periodic course W3 of the thickness D3 and the periodic course W3 * of the hardness H or the modulus of elasticity of the foam material 5 contribute to the fact that the inner wall 2 predominantly radially outwards in the regions 9 of minimal thickness D3 of the foam material 5, ie in the
- the inner wall corrugation the inner wall can be both lengthened and shortened along the axial direction of the tube. Now the inner wall 2 behaves the outside of the pipe bend not as the neutral fiber or neutral surface of the bent pipe 1 ”. Rather, the arc length of the central bending line or bending surface M inside the pipe bend is just as long as the corresponding length of the central line or surface in the straight state of the pipe 1. That is, the central bending line or bending surface M is the imaginary, non-material "Neutral fiber" or "neutral surface”.
- Fig. 9 is a longitudinal section through the tube wall of a sixth
- Embodiment of the pipe 1 ’” according to the invention.
- the pipe 1 ′′ has an inner wall 2, an outer wall 4 surrounding the inner wall and one
- Gap 3 is filled with a sound absorbing material 5.
- Outer wall 4 is a corrugated tube 4a, 4b with wave crests 4a and wave troughs 4b extending along the circumferential direction.
- the inner wall 2 is a corrugated tube 2a, 2b which extends along the circumferential direction
- the spacer 6 is also a corrugated tube 6a, 6b with wave crests 6a and 6 extending along the circumferential direction
- Outer wall 4 each have a smaller amplitude A2 or A4 than the amplitude A6 of the corrugation W6 of the spacer 6.
- the wavelength L6 of the corrugation W6 of the spacer 6 is a multiple of the wavelength L2 of the corrugation W2
- the wavelength L6 of the corrugation W6 of the spacer 6 is a multiple of the wavelength L4 of the corrugation W4 of the outer wall 4.
- Foam material »and « hardness Fl of the foam material »(modulus of elasticity) are shown as a function of the axial coordinate x along the axial direction of the tube according to the invention. D3 and H run in phase here.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Pipe Accessories (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH11712017 | 2017-09-25 | ||
PCT/IB2018/057389 WO2020095086A1 (en) | 2017-09-25 | 2018-09-25 | Tube for air distribution systems |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3688358A1 true EP3688358A1 (en) | 2020-08-05 |
Family
ID=68210548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18786404.6A Withdrawn EP3688358A1 (en) | 2017-09-25 | 2018-09-25 | Tube for air distribution systems |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3688358A1 (en) |
EA (1) | EA202090840A1 (en) |
WO (1) | WO2020095086A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115479173B (en) * | 2022-10-14 | 2024-06-07 | 含山瑞可金属有限公司 | Large-sized branch pipe |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3374856A (en) * | 1966-09-09 | 1968-03-26 | Garrett Corp | Flexible sound attenuating duct with foamed plastic lining |
GB1249566A (en) * | 1969-02-10 | 1971-10-13 | Normalair Garrett Ltd | Improvements in or relating to flexible hoses |
DE3725147A1 (en) * | 1987-07-29 | 1989-02-09 | Bayerische Motoren Werke Ag | Sound-insulating component |
DE9104906U1 (en) * | 1990-10-15 | 1991-07-18 | kabelmetal electro GmbH, 3000 Hannover | Helical or annular corrugated metal pipe |
FR2756906B1 (en) * | 1996-12-10 | 1999-01-22 | Alphacan Sa | PLASTIC TUBE WITH IMPROVED ACOUSTIC PROPERTIES, AND METHOD FOR MANUFACTURING SUCH A TUBE |
WO1999017048A1 (en) * | 1997-10-01 | 1999-04-08 | Shishiai-Kabushikigaisha | Fire-resistant sound-proof pipe |
DE29803494U1 (en) * | 1998-02-27 | 1999-04-08 | Westa-Holding GmbH & Co. KG, 33334 Gütersloh | Pipe silencer |
JP2000088329A (en) * | 1998-09-16 | 2000-03-31 | Totaku Kogyo Kk | Adiabatic silencing duct |
DE202004017583U1 (en) * | 2004-11-12 | 2005-01-20 | Recytex-Textilaufbereitung Gmbh & Co. Kg | Sound absorbing and/or heat insulating pipe comprises a helically wound element carrying pipe wall components in the form of an inner nonwoven fiber layer and an outer foil layer |
EP1681503B1 (en) * | 2005-01-14 | 2012-04-04 | Boa Flexible Solutions | Rigid tube with increased heat and sound insulation |
DE202005007835U1 (en) | 2005-05-19 | 2005-07-21 | Zehnder Verkaufs- Und Verwaltungs-Ag | Ventilation pipe for building has accordion pleated outer wall and connected inner wall of rectangular or oval section |
-
2018
- 2018-09-25 EA EA202090840A patent/EA202090840A1/en unknown
- 2018-09-25 EP EP18786404.6A patent/EP3688358A1/en not_active Withdrawn
- 2018-09-25 WO PCT/IB2018/057389 patent/WO2020095086A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
EA202090840A1 (en) | 2020-08-26 |
WO2020095086A1 (en) | 2020-05-14 |
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