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
  • F16L11/111—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
  • F16L11/14—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
  • F16L51/00—Expansion-compensation arrangements for pipe-lines
  • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
  • F16L51/025—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with several corrugations

Definitions

• the invention relates to a fluid line with a waveform section according to the preamble of claim 1.
• the pressure drop in the system is critical and must be as low as possible.
• the weight should be reduced and the lines should be designed to be flexible in order to compensate for relative movements between the connection points and to enable simple assembly. Rubber hoses are often used under conditions that offer high flexibility and low pressure losses. However, they are rather heavy and expensive.
• Extruded plastic raw materials are significantly lighter and cheaper. They are typically either smooth, wavy, or partially wavy. Smooth pipes have low pressure losses, however, they are relatively stiff, while corrugated hoses have a flexibility that is comparable to that of rubber. However, the gain in flexibility comes at the expense of significantly increased pressure losses.
• the pressure losses can be favored by the wave shape, since a fluid flowing over a wave shape cannot follow the waves. This leads to increased friction and swirling of the fluid flow on the wall, so that the fluid flow is detached from the wall. The detachment from the wall favors the creation of eddies, which reduce the flow velocity.
• the object of the invention can therefore be seen to provide a fluid line with a waveform section which further reduces a pressure drop at the waveform section.
• the waveform section extending at a minimum distance along a longitudinal axis of the fluid line
• the invention provides that the waveform section has a wave top element which has a varying distance from the longitudinal axis along a circumferential direction extending around the longitudinal axis of the fluid line , wherein the distance comprises a distance profile in the circumferential direction, wherein the distance profile provides a non-circular contour.
• the invention uses a waveform section with wave crest elements for generating a curve in the fluid line, an optimized curve shape of the fluid line being provided due to the varying distance of the wave crest element from the longitudinal axis along the circumferential direction around the longitudinal axis.
• the varying spacing of the wave surface element in the circumferential direction has the effect that the flexibility of the waveform section varies along the circumferential direction.
• a circumferential position of the shaft top element which stood a large distance from the longitudinal axis of the fluid line, causes a high degree of flexibility in this position.
• a circumferential position of the shaft top element with a small distance from the longitudinal axis causes little flexibility in this position.
• the flexibility of the waveform section can thus be selected locally by means of the distance to the longitudinal axis so that when a curve is generated in the fluid line at the waveform section, optimized flexibility of the waveform section is provided for each angular position along the circumferential direction around the longitudinal axis. For example, greater flexibility can be provided at the circumferential positions of the corrugated top element that are intended to form the outer radius of the curve than at the circumferential positions of the corrugated top element that form the inner radius.
• an optimized curve shape can be provided that provides a surface with a minimal wave shape, ie waves with very low amplitude, or a smooth surface on which the generation of eddies in the fluid line on the inner radius of the curve within the fluid line the flow to be reduced. This has the effect of reducing or preventing a pressure drop at the curve of the fluid line generated at the wave-shaped section.
• the distance between the wave top element can change continuously along the circumferential direction.
• the flexibility of the waveform section can thus be adapted even more favorably to the curve of the fluid line to be produced, so that a pressure drop is further reduced.
• the distance in the circumferential direction can change according to a sine function or according to a square of a sine function.
• the wave top element can extend in the circumferential direction only around a partial circumference of the waveform section.
• the increased flexibility by means of the corrugated shape can only be provided at the positions where increased flexibility is required for stretching the material.
• a curve of the fluid line z. B. regularly no increased flexibility is required, so that the waveform can be dispensed with at these positions, which brings about a further reduction in pressure drop.
• the fluid line can thus have a wave-free wall section which has a smooth surface along the longitudinal axis, the wave-shaped section comprising a first end region and a second end region in the circumferential direction, the wave-free wall section extending between the first and the second end region.
• the wave-free wall section By providing the wave-free wall section, it can be ensured that a smooth wall surface is present in the interior of the fluid line at the provided inner radius of a curve of the fluid line. This counteracts increased friction in the fluid flow on the inner radius of the curve.
• the downturn-free wall section In combination with the increased flexibility of the waveform section on the wave crest elements, the downturn-free wall section is subject to only a slight change in length along the longitudinal axis, if at all. Furthermore, the white wall section is not compressed, so that the smooth surface of the wave-free wall section does not have any humps that can be caused regularly by compressing materials. This contributes to a further reduction in the pressure drop in the fluid flow.
• the wall section free of downtimes can be arranged at a minimum distance from the longitudinal axis.
• the wave-free wall section thus has the same distance from the longitudinal axis as the other sections of the fluid line that adjoin the wave-shaped section.
• the wave top element can have a maximum distance from the longitudinal axis, a position of the maximum distance in the circumferential direction being arranged diametrically opposite a position of the waveform section which has the minimum distance from the longitudinal axis.
• a circumferential position with maximum flexibility and a circumferential position with minimal flexibility are thus diametrically opposite one another in the circumferential direction.
• the circumferential position with the maximum distance to the longitudinal axis and the order starting position with the minimum distance to the longitudinal axis little to no deformation.
• the stand from the shaft-free wall section can be constant to the longitudinal axis in the circumferential direction. This causes an optimally designed wall surface on the inner radius of the curve, which further reduces eddies and thus a pressure drop.
• the wall section free from space can have a neutral fiber of the fluid line.
• the space-free wall section can sweep over an angle in the circumferential direction in the range between 0 ° and 180 °, preferably between 0 ° and 120 °, more preferably between 0 ° and 80 °.
• the fluid line can have at least one wave-free line section which extends away from the wave-shaped section along the longitudinal axis.
• the waveform section can thus be arranged in a targeted manner on a curve provided between wave-free line sections.
• the wave shape section can further have a plurality of wave crest elements, with a wave valley element being arranged between each two wave crest elements, which is arranged at the minimum distance from the longitudinal axis.
• the number of wave top elements in the waveform section can be adapted to the extension length or the bending angle of the curve provided. The larger the bending angle of the intended curve, the more wave crest elements can be used.
• the fluid conduit may have a curve in which the waveform section is arranged.
• the wave top element can be arranged on an outer radius of the curve.
• the waveform section can have the minimum spacing on an inner radius of the curve over its entire extent along the longitudinal axis.
• FIG. 1a, b are sectional drawings of a schematic representation of a fluid line with a waveform section
• FIG. 2 shows a schematic illustration of a fluid line with a curved one
• FIG. 3 shows a diagram with exemplary courses of the varying distance along the circumferential direction.
• a fluid line is shown schematically in FIG. 1 a and is designated in its entirety by the reference symbol 10.
• Figure 1a shows a schematic representation of the fluid line 10 in a side view.
• the fluid line 10 extends in the horizontal direction along the longitudinal axis 16 and can be formed from an extruded plastic material.
• the fluid line 10 further comprises a waveform section 12 which extends at least at a minimum distance 14 from the longitudinal axis 16 along the longitudinal axis 16 of the fluid line 10.
• the Wellenformab section 12 is arranged between two line sections 28 which have no wave shape. Rather, the line sections 28 have a smooth wall.
• the Wel lenformabites 12 is arranged at a position at which a curve is to be made in the fluid line 10 ago.
• the wave-shaped section 12 has at least partially a wave-shaped wall section which has at least one wave crest element 18 which extends between a maximum distance 24 from the longitudinal axis 16 and the minimum distance 14 from the longitudinal axis 16.
• the corrugated section 12 comprises a plurality of corrugation crest elements 18, which are separated from one another by corrugation valley elements 34.
• a wave trough element 34 is arranged at a minimum distance 14 from the longitudinal axis 16.
• the number of wave top elements 18 in the waveform section 12 can be adapted to the extension length or the bending angle of the curve before seen. The greater the bending angle of the curve provided, the more wave crest elements 18 can be used.
• the at least one shaft top element 18 extends according to FIG.
• FIG. 1 b shows a view of the fluid line 10 along the longitudinal axis 16.
• the illustration of the fluid line 10 corresponds to a section along the line AA from FIG. 1 a, the longitudinal axis 16 being arranged orthogonally to the cutting surface.
• the corrugated top element 18 has a varying distance 22 from the longitudinal axis 16. That is, if the corrugated top element 18 is followed along the circumferential direction 20, the distance 22 of the corrugated top element 18 to the longitudinal axis 16 changes. Different angular positions of the wave top element 18 along the circumferential direction 20, which can also be called circumferential positions here, have different distances 22 to the longitudinal axis 16.
• the shaft top element 18 is designed to be differently flexible at the different circumferential positions.
• the local flexibility of the wave top element 18 can therewith be adapted in such a way that it corresponds to the local flexibility required to generate a curve in the fluid line 10. Areas that are intended to form an outer radius of the curve, wei sen thereby to increased flexibility in that the distance 22 in these areas are increased up to the maximum distance 24. The remaining areas, in which an inner radius of the curve is to be formed, have smaller or no increased distances 22 at their circumferential positions.
• the wave crest element 18 comprises a first circumferential position at which the wave crest element 18 has the maximum distance 24 from the longitudinal axis 16.
• the first circumferential position is diametrically opposed to a further circumferential position at which the Wellenbergele element 18 has the minimum distance 14 from the longitudinal axis 16.
• the corrugated top element 18 extends in the circumferential direction 20 by only a part of the circumference of the corrugated section 12.
• the corrugated top element 18 comprises a first end area 30 and a second end area 32.
• the varying distance 22 decreases at the two end areas 30, 32 of the corrugated top element 18 proceeding from the maximum distance 24 in the circumferential direction 20 so far that it corresponds to the minimum distance 14 at a circumferential position outside the Wel lenbergelements 18. Consequently, the varying stood 22 between the two end regions 30, 32 up to the maximum distance 24 continuously Lich.
• a circumferential position with maximum flexibility and a circumferential position with minimal flexibility are thus diametrically opposite one another in circumferential direction 20.
• the two end regions 30, 32 are connected to one another in the circumferential direction 20 outside the Wellenbergele element 18 in the waveform section 12 by a wave-free wall section 26, which can also be referred to as a smooth region.
• the wave-free Wandab section 26 has a smooth wall which has no waves in a direction along the longitudinal axis 16 and in the circumferential direction 20, but rather is smooth. Furthermore, the wave-free wall section 26 is arranged at a minimum distance 14 from the longitudinal axis 16. Furthermore, the distance between the wave-free wall section 26 and the longitudinal axis 16 can be constant over its entire surface.
• FIG. 2 shows the fluid line 10 in which the waveform section 12 is bent and provides a curve 36 in the fluid line 10.
• the curve 36 has an outer radius 38 and an inner radius 40.
• the wave top elements 18 with the intervening wave valley elements 34 extend in the circumferential direction 20 over the region of the curve 36 which is arranged on the outer radius 38.
• the multitude of corrugated mountain elements 18 are arranged alternately with the corrugated valley elements 34 and form the wave shape of the waveform section 12 along the longitudinal axis 16.
• the area around the inner radius 40 of the curve 36 is free of the corrugated mountain elements 18.
• the material of the fluid line 10 is subject to different stretching depending on the distance 22 of the shaft top element 18. At the inner radius 40 of the curve 36 there is no longer any stretching of the material.
• the neutral fiber 42 of the fluid line 10 is arranged at this position.
• the wave-free wall section 26 is neither compressed nor stretched on the neutral fiber 42. In the direction of the wave top elements 18 there is a slight stretching of the wave-free wall section 26, which is facilitated at the beginning of the end regions 30, 32 by increasing the flexibility of the waveform section 12.
• FIG. 3 shows a diagram 44 that plots the difference between the local distance between a circumferential position of a wave top element 18 and the minimum distance 14 against the circumferential angle in the circumferential direction 20.
• the difference is based on the maximum difference, i.e. the difference between the maximum distance 24 and the minimum distance 14 normalized.
• the circumferential angle is shown from 0 ° to 180 °, it being assumed that at a circumferential angle of 180 °, the circumferential position of the shaft top element 18 is arranged at the maximum distance 24.
• the course of the distance in the circumferential direction 20 provides a non-circular contour.
• the diagram 44 shows the distance profile in the circumferential direction 20 and in the opposite direction to the circumferential direction 20. That is, the diagram 44 shows only half a rotation around the longitudinal axis in the circumferential direction 20 or against the circumferential direction 20.
• a first distance course 46 of the wave top element 18 in the circumferential direction 20 is formed si nus-shaped, with the minimum angle between 0 ° and 40 ° distance is present and the sinusoidal curve begins from the angular position 40 °.
• the white wall section 26 or smooth area covers in the circumferential direction 20 an angle between 0 ° and 180 °, preferably between 0 ° and 120 °, more preferably between 0 ° and 80 °.
• the maximum of the first distance profile 46 is arranged at the angular position 180 °.
• a second distance profile 48 has a shape that corresponds to the square of a sine.
• the second distance profile 48 initially rises less than the first distance profile 46.
• the slope of the second distance profile 48 is greater than the slope of the first distance profile 46, so that the second distance profile 48 also has the maximum distance 24 at the 180 ° position .
• the two distance profiles 46, 48 show only examples of the varying distance 22 along the circumferential direction 20 of a corrugation top element 18. Other profiles of the distance are not excluded and can also be used. In particular, in the circumferential direction 20, the angular range of the wave-free wall section 26 or of the wave top element 18 can be made larger or smaller than explained in this exemplary embodiment.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Pipe Accessories (AREA)
• Rigid Pipes And Flexible Pipes (AREA)
• Diaphragms And Bellows (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=70391124

Family Applications (1)

Country Status (8)

Families Citing this family (1)

Family Cites Families (15)

• 2019
  • 2019-04-26 DE DE102019110849.7A patent/DE102019110849A1/de not_active Ceased
• 2020
  • 2020-04-20 US US17/606,573 patent/US20220221088A1/en active Pending
  • 2020-04-20 WO PCT/EP2020/061021 patent/WO2020216724A1/de unknown
  • 2020-04-20 JP JP2021559795A patent/JP2022528544A/ja not_active Ceased
  • 2020-04-20 KR KR1020217037466A patent/KR20210151219A/ko not_active Application Discontinuation
  • 2020-04-20 EP EP20720806.7A patent/EP3959462A1/de not_active Withdrawn
  • 2020-04-20 CN CN202080030271.5A patent/CN113710945A/zh active Pending
  • 2020-04-20 MX MX2021011740A patent/MX2021011740A/es unknown

Also Published As

Similar Documents

Legal Events