EP3887241A1 - Endboden - Google Patents
EndbodenInfo
- Publication number
- EP3887241A1 EP3887241A1 EP19813252.4A EP19813252A EP3887241A1 EP 3887241 A1 EP3887241 A1 EP 3887241A1 EP 19813252 A EP19813252 A EP 19813252A EP 3887241 A1 EP3887241 A1 EP 3887241A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tangent
- radius
- curvature
- area
- tube
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/50—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by forming methods, e.g. manufacturing of curved blocks
Definitions
- the invention relates to a weight-optimized end floor.
- An end floor closes a pipe.
- Many storage tanks or chemical reactors have end plates. Often these end floors are made in the form of bobbin lace, as described for example in DIN 28011.
- a bobbin case bottom has two different radii of curvature, a large radius in the central area and a radius that is 10 times smaller in the edge area. But there are also other end floors, for example arched floors according to DIN 28013 or elliptically shaped end floors.
- Bionics for example, is used for further optimization. Such methods are known for example from DIN ISO 18459.
- the method of train triangles with a method for rounding the contour should be mentioned here.
- a first triangle with an angle of 45 ° is constructed. From its center, a circle is constructed with the center at the intersection of the first triangle with the wall and a connection between the center of the first triangle and the intersection of the circle with the wall is constructed. Then it starts again from the center of the second triangle constructed a third triangle. Then the construction resulting from these three triangles is rounded.
- the object of the invention is to provide an end floor which, due to its stability, manages with a smaller wall thickness and is therefore lighter with the same compressive strength.
- the method according to the invention for determining a cross section of an end base is based on a tube and a flat base perpendicular to the longitudinal axis of the tube, the method comprising the following steps:
- the flat bottom which is perpendicular to the longitudinal axis of the tube, is not a real bottom, it only serves as a theoretical starting point. With a round cross-section, the flat bottom corresponds to the circular area on the bottom or top of the cylinder. The flat bottom must be perpendicular to the tube so that the center point of the end point has exactly this slope and thus covers every half of the end floor exactly 90 °.
- a pipe in the sense of the invention is a body which has a longitudinal direction and a wall running in the longitudinal direction on the outside.
- a tube preferably has an oval, in particular a round (circular) or an elliptical, cross section.
- the cross section does not have to be constant over the entire length of the tube.
- the diameter of a round cross section can be varied with the length.
- a tube with a round cross section is also referred to as the outer surface of a cylinder.
- a tube with an elliptical cross section is also referred to as the outer surface of an elliptical cylinder.
- the tube and thus the end base preferably have rotational symmetry and / or mirror symmetry. It is therefore sufficient to calculate one half of the cross section. The opposite side results from mirroring on the axis of symmetry or the point of symmetry.
- the end plate can only be determined by the method in a limited number of cross-sections. In order to reduce computing effort, the run of the end plate is interpolated between these calculated courses. For example, only four half cross sections are calculated accordingly, which are each arranged at right angles to one another.
- the advantage of the end floor constructed in this way is a weight reduced by 1.4% with a 23% reduction in tension at an angle of 54 °.
- the wall thickness can be further reduced with the same dielectric strength, whereby further weight can be reduced.
- the interior volume is increased due to the steeper starting angle.
- the method shown leads to a bottom shape that cannot be represented by a simple ellipse equation or circular equation.
- the end plate can be used, for example, and in particular for producing storage, reaction and pressure containers for gaseous and liquid substances.
- the end plate can particularly preferably be used to produce pipes which are carried out by a pressure body, for example and in particular for use in submarines.
- the tube is closed at both ends by an end base according to the invention.
- the tube is closed at one end by an end base according to the invention and has an openable cover at the other end.
- the angle between the first tangent and the tube wall is selected between 51 ° and 57 ° in step a).
- the angle between the first tangent and the tube wall is selected between 53 ° and 55 ° in step a).
- the invention in a further aspect, relates to an end base, the end base having a first radius of curvature in a first region, a second radius of curvature in a second region and a third radius of curvature in a third region.
- the end of the first area facing away from the second area borders the tube, the end of the third area facing away from the second area has the area orthogonal to the tube, and the second area is arranged between the first area and the third area.
- the first radius of curvature, the second radius of curvature and the third radius of curvature were constructed using the method according to the invention.
- the invention relates to a watercraft with a pipe and an end floor according to the invention.
- the watercraft is preferably a submarine.
- the end plate according to the invention can also be used in other areas, for example in storage tanks or chemical reactors.
- Fig. 1 method for determining a cross section
- Fig. 1 the method is shown step by step. 1 a begins with the tube 10 and the flat base 20.
- a first tangent 30 is inserted at an angle of 54 °, as shown in FIG. 1 b.
- the center of the first tangent 30 is identified and a circle is constructed from the intersection of the first tangent 30 with the flat bottom 20 with the radius from the intersection of the first tangent 30 with the flat bottom 20 to the center of the first tangent 30.
- the second tangent 40 in FIG. 1d results from the intersection of this circle with the flat bottom 20 and the first tangent 30.
- a further circle is constructed in FIG. 1e, from whose intersection points the third tangent 50 results.
- a second area 100 is now obtained, which is adjacent to a first area 90 and a third area 110.
- the axis of rotation of the tube or the central axis 80 is also shown in FIG. 1f.
- the transition from the first region to the second region 60 and the transition from the second region to the third region 70 result from the points at which the rounding tangentially meets the first tangent 30 and the third tangent 50.
- This then results in the constructed course 120, which runs tangentially to the flat bottom 20 on the central axis 80.
- 1 h only shows the constructed course 120 without defining a cross section through the three triangles. Taking into account the wall thickness, the end base results in FIG. 1 i, which can be formed in all three dimensions by rotation about the axis of rotation of the tube 80.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Prostheses (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018220265.6A DE102018220265A1 (de) | 2018-11-26 | 2018-11-26 | Endboden |
| PCT/EP2019/082066 WO2020109127A1 (de) | 2018-11-26 | 2019-11-21 | Endboden |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3887241A1 true EP3887241A1 (de) | 2021-10-06 |
| EP3887241B1 EP3887241B1 (de) | 2022-11-09 |
Family
ID=68762699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19813252.4A Active EP3887241B1 (de) | 2018-11-26 | 2019-11-21 | Endboden |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3887241B1 (de) |
| DE (1) | DE102018220265A1 (de) |
| ES (1) | ES2932953T3 (de) |
| WO (1) | WO2020109127A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023001453A1 (de) * | 2023-04-06 | 2024-10-10 | Ziehl-Abegg Se | Einlaufdüse für Ventilatoren |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3406921A1 (de) * | 1984-02-25 | 1985-09-05 | Gemmecke, Kurt, Ing.(grad.), 2400 Lübeck | Unterwasserausstossvorrichtung fuer projektile |
| DE10324366A1 (de) * | 2003-05-27 | 2004-12-16 | Feldbinder & Beckmann Fahrzeugbau Gmbh & Co Kg | Verfahren und Vorrichtung zur Herstellung eines Formteiles, sowie Formteil, insbesondere ein Behälterboden |
| DE102012007404A1 (de) * | 2012-04-16 | 2013-10-31 | Stiebel Eltron Gmbh & Co. Kg | Druck-Speicherbehälter |
| DE102014202972A1 (de) * | 2014-02-18 | 2015-08-20 | Gebrüder Egli Maschinen Ag | Betonbrechzange |
-
2018
- 2018-11-26 DE DE102018220265.6A patent/DE102018220265A1/de not_active Withdrawn
-
2019
- 2019-11-21 EP EP19813252.4A patent/EP3887241B1/de active Active
- 2019-11-21 ES ES19813252T patent/ES2932953T3/es active Active
- 2019-11-21 WO PCT/EP2019/082066 patent/WO2020109127A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018220265A1 (de) | 2020-05-28 |
| EP3887241B1 (de) | 2022-11-09 |
| WO2020109127A1 (de) | 2020-06-04 |
| ES2932953T3 (es) | 2023-01-30 |
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