CN113056338A - Pipe with helical seam and method for producing a pipe with helical seam - Google Patents
Pipe with helical seam and method for producing a pipe with helical seam Download PDFInfo
- Publication number
- CN113056338A CN113056338A CN202080006260.3A CN202080006260A CN113056338A CN 113056338 A CN113056338 A CN 113056338A CN 202080006260 A CN202080006260 A CN 202080006260A CN 113056338 A CN113056338 A CN 113056338A
- Authority
- CN
- China
- Prior art keywords
- metal strip
- wall thickness
- tube
- length
- helical seam
- 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.)
- Pending
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/122—Making tubes or metal hoses with helically arranged seams with welded or soldered seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/16—Making tubes with varying diameter in longitudinal direction
- B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
- B21C37/185—Making tubes with varying diameter in longitudinal direction conical tubes starting from sheet material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
Abstract
The invention relates to a tube (2) having a helical seam, comprising at least one cylindrical tube section which is formed from a metal strip (n + x) which is integrally formed, bent helically and welded at a continuous helical seam (3) and which has a varying wall thickness over its length. The invention also relates to a method for producing a cylindrical tube (2) having a helical seam, in which method at least one metal strip (n + x) is helically deformed into the slotted tube by means of at least one bending device and the metal strip (n + x) is welded at strip edges which meet at the helical seam, and wherein a metal strip having a varying wall thickness over its length is used as the metal strip (n + x).
Description
Technical Field
The invention relates to a tube with a helical seam, consisting of a helically curved metal sheet which is welded at the helical seam.
The invention also relates to a method for producing a tube with a helical seam and to the use of a tube with a helical seam for building a tower construction.
Background
For certain structures, for example for the tower construction of a wind turbine, the diameter is usually designed according to the bending moment course of the expected load. The tower structure of a wind turbine usually comprises a number of sections, which are composed of a number of pipe sections. The pipe sections are usually connected to one another at the flange connection by means of screws.
The sections or pipe sections are manufactured in a factory and assembled into the tower structure on site. The wall thickness of each pipe section is designed according to the expected load. This means that, for example, sections or pipe sections have a correspondingly large diameter and a large wall thickness in the region of the tower base, whereas sections or pipe sections which are to be arranged further above have a smaller diameter and a smaller wall thickness. Typically, the size of the sections used is limited due to the need to transport to the worksite. In general, it is also desirable to optimize the wall thickness and geometry of each segment for the expected bending stresses.
Structures for accommodating wind generators are known from the prior art, which consist of helically welded conical sections. A method for producing a tapered conical structure from spirally welded plates is known, for example, from US 8720153B 2, in which the basic shape of a cone is obtained by first cutting out the shape of the cone in a graphical manner axially and spreading it out into a plane. The edge lines of one or more strips are then drawn on the trapezoid obtained in this way. The correspondingly cut sheets are then rolled into a conical structure with helical stitches and welded to one another along the resulting helical stitches. This method is cost prohibitive and complicated.
From US2018/0193893a 1a method is known for producing a cylindrical tube with a helical seam having a varying wall thickness over its length. In this method, a plurality of sheet metal materials of different wall thickness are welded to form a strip or band, which is helically bent into a seamed tube by means of a bending device, and the welding is carried out along a continuous helical seam. This method requires the provision of a large number of sheets having different wall thicknesses. Furthermore, the tube with helical seam thus produced comprises a large number of transverse welds forming lines of weakness or stress concentration (Kerblinie) of the tube. Since different wall thicknesses are usually used per turn, there are also material discontinuities which must be taken into account when calculating the resulting structure.
Disclosure of Invention
The object of the present invention is therefore to avoid the disadvantages mentioned above and in particular to provide a tube with a helical seam which can be produced in a relatively simple manner with a wall thickness distribution which is matched to the expected load.
It is also an object of the present invention to provide a method for producing such a tube with a helical seam. Finally, the object of the invention is to enable the production of a structure that is constructively matched to the intended bend line in a simple manner, using a tube with a helical seam.
This object is achieved by the features of the independent claims 1, 7 and 12. Advantageous embodiments of the invention result from the dependent claims.
According to the invention, a tube with a helical seam is provided, comprising at least one cylindrical tube section, which is formed from a metal strip that is integrally formed, bent helically and welded at a helical seam and has a varying wall thickness over its length.
In this way, transverse welds are avoided as much as possible. Preferably, so-called coiled strip, which is obtained by hot rolling in a rolling mill, can be used as the metal strip. Such a metal strip can be provided relatively simply, having a varying diameter over its length or having a varying wall thickness over its length.
According to the invention, the tube with the spiral seam preferably consists of a plurality of cylindrical tube sections, which are respectively joined at the end faces. The tube sections can be welded to one another, for example.
The wall thickness of the metal strip of at least one tube section may vary continuously or discontinuously over its length.
The wall thickness of the metal strip may, for example, be relatively large at the first end and relatively small at the second end. The wall thickness of the metal strip may decrease continuously over a first section of the metal strip from a first end of the metal strip, for example, approximately to a middle of the metal strip. In this case, the wall thickness can be kept constant, for example, approximately from the middle of the metal strip to the second end of the metal strip. The ratio of the lengths of the relevant sections of the metal strip to one another is not critical to the invention. In the previously mentioned example, the first section of the metal strip extends approximately from the first end to the middle of the metal strip. However, the section may extend, for example, only one third, one quarter, three quarters or any other portion of the length of the metal strip.
Alternatively, it can be provided that the metal strip has at least two sections with different wall thicknesses, the wall thickness of each section being constant.
In principle, it can be advantageous if the wall thickness of the metal strip of at least one tube section varies over its entire length or over any partial length.
In an advantageous and expedient variant of the tube according to the invention with a helical seam, it is provided that the first metal strip of the first tube section is connected to the second metal strip of the second tube section by means of a transverse weld seam, and that the first metal strip and the second metal strip have the same wall thickness in the region of their connection by means of the transverse weld seam.
Suitably, the outer or inner diameter of at least one cylindrical pipe section is constant.
According to the invention, a method for producing a tubular tube having a helical seam, in particular a tube having a helical seam of one of the above-mentioned features, is provided, in which method at least one metal strip is helically deformed into a slotted tube by means of at least one bending device and the metal strip is welded at strip edges which meet at the helical seam, wherein a metal strip having a varying wall thickness over its length is used as the metal strip.
Bending devices or deformation units for producing the seamed pipe according to the present invention are in principle known in the prior art, for example from US2018/0193893a 1.
The metal strip may be welded in a single stage or in multiple stages. In an advantageous variant of the method according to the invention, it is provided that the strip edge is welded in a plurality of steps, wherein in a first step, only the strip edge is initially tack welded and in a second step, the final welding is carried out by laying a continuous spiral weld seam.
Suitably, a metal strip obtained by rolling, preferably by hot rolling, is used as the metal strip. The wall thickness of the metal strip may vary over the entire length or over part of the length.
In a preferred variant of the method according to the invention, it is provided that a metal strip with a wall thickness that varies over its length and a further metal strip with a wall thickness that varies over its length are welded to one another at the end faces, or that a metal strip with a wall thickness that varies over its length and a metal strip with a constant wall thickness over its length are welded to one another at the end faces, wherein the metal strips each form a tube section which has the same nominal wall thickness at the end to be welded.
In the case of the use of a rolled strip with a discontinuous wall thickness, a tube with a helical seam can be produced in a particularly simple manner according to the method described above, which is particularly suitable for producing a materially optimized tubular tube/tower. The tube with helical slits according to the invention can be used, for example, for producing tower structures for wind power generators.
Drawings
The invention is elucidated below with reference to the drawings. Wherein:
fig. 1 shows two rolled metal strips, which each have a varying wall thickness over their length,
figure 2 shows a first section of a tube according to the invention having a helical seam,
FIG. 3 shows a second section of a tube having a helical seam according to the invention, and
figure 4 shows a longitudinal section of a tube with helical slits according to the invention.
Detailed Description
Reference is first made to fig. 1. Fig. 1 shows a metal strip 1a of a first type and a metal strip 1b of a second type, respectively, obtained by hot rolling.
The metal strip 1a of the first type has a first end portion with a wall thickness t1 and a second end portion with a wall thickness t 2. The wall thickness or thickness of the first metal strip 1a decreases continuously from the wall thickness t1 of the first end portion to the wall thickness t2 of the second end portion.
The metal strip of the second type 1b has a first end portion with a wall thickness t1 and a second end portion with a wall thickness t 2. The wall thickness or thickness of the metal strip of the second type 1b decreases discontinuously from the wall thickness t1 of the first end portion to the wall thickness t2 of the second end portion. The first partial length, shown on the left in fig. 1, of the metal strip 1b of the second type approximately to the middle thereof has a continuously relatively large wall thickness t1, while the second partial length approximately from the middle to the second end has a relatively small wall thickness t 2.
According to the method for producing a tube 2 with a helical seam, which is shown in fig. 2 to 4 by way of example, a metal strip 1a and/or a metal strip 1b of the type according to fig. 1 is helically deformed into a slotted tube by means of a bending device. Metal strips 1a, 1b of the relevant type are welded together along strip edges 4 meeting at a spiral seam line 3.
The pipe 2 shown in fig. 2 with a helical seam comprises, in the section shown, a first metal strip n, a second metal strip n +1 and a third metal strip n +2, which are each joined together at the end face with the formation of a transverse weld seam 5. Each of the metal strips n, n +1, n +2 forms a tube section of the tube 2 with a helical seam.
Each of the metal strips n, n +1, n +2 may be a metal strip 1a of a first type or a metal strip 1b of a second type. The second metal strip n +1 has a wall thickness t1 at its left end which is equal to the wall thickness of the first metal strip n at its right end. The second metal strip n +1 has a wall thickness t2 at its right end which is equal to the wall thickness of the third metal strip n + 2.
Fig. 3 shows a further section of the tube 2 with helical seam, which is coupled to the right end of the tube 2 with helical seam shown in fig. 2 and comprises a third metal strip n +2 and a fourth metal strip n +3 and a fifth metal strip n + 4. The third metal strip n +2 has a constant wall thickness t 2. The fourth metal strip n +3 has a wall thickness t2 at its left end and a wall thickness t1 at its right end. Coupled to the fourth metal strip is a fifth metal strip n +4, which has a wall thickness t1 at its left end. Unlike the section of the tube 2 with the spiral slit according to fig. 2, the fourth metal strip n +3 is oriented in the opposite direction to the second metal strip n + 1.
Fig. 4 shows a longitudinal section through a tube 2 with a helical seam, in which the wall thickness of the metal strip n + x varies continuously. In this case, the wall thickness decreases continuously from left to right.
List of reference numerals
1a Metal strip of a first type
1b Metal strip of the second type
t1 first wall thickness
t2 second wall thickness
2 tube with spiral seam
3 spiral suture
4 belt edge
5 transverse weld
N first metal strip
n +1 second metal strip
n +2 third metal strip
n +3 fourth metal strip
n +4 th metal belt
n + x arbitrary metal belt
Claims (12)
1. A tube (2) having a helical seam comprises at least one cylindrical tube section consisting of a metal strip (n + x) which is integrally formed, bent helically and welded at a continuous helical seam (3) and which has a varying wall thickness over its length.
2. Tube with helical seam according to claim 1, characterized in that the wall thickness of the metal strip (n + x) of at least one tube section varies continuously over its length.
3. Tube with helical seam according to any of claims 1 or 2, characterized in that the wall thickness of the metal strip (n + x) of at least one tube section varies discontinuously over its length.
4. Tube with helical seam according to any of claims 1 to 3, characterized in that the wall thickness of the metal strip (n + x) of at least one tube section varies over its total length or over part of its length.
5. The tube with spiral seam according to any of the claims 1 to 4, characterized in that the first metal strip (n) of the first tube section is connected with the second metal strip (n +1) of the second tube section by means of a transverse weld seam (5), and the first metal strip (n) and the second metal strip (n +1) have the same wall thickness in the region where they are connected by the transverse weld seam (5).
6. A tube having a helical seam as claimed in any one of claims 1 to 5 wherein the internal or external diameter of at least one cylindrical tube section is constant.
7. Method for producing a cylindrical tube (2) having a helical seam, in particular for producing a tube (2) having a helical seam having the features according to one of claims 1 to 6, in which method at least one metal strip (n + x) is helically deformed into a slotted tube by means of at least one bending device and the metal strip (n + x) is welded at a strip edge (4) which merges at the helical seam (3), wherein a metal strip having a varying wall thickness over its length is used as the metal strip (n + x).
8. Method according to claim 7, characterized in that the welding of the band edges (4) is performed in a plurality of steps, wherein in a first step the band edges (4) are connected by a tack weld and in a second step a final weld is performed.
9. Method according to any one of claims 7 or 8, characterized in that a metal strip obtained by rolling, preferably by hot rolling, is used as the metal strip (n + x).
10. Method according to any one of claims 7 to 9, characterized in that the wall thickness of the metal strip (n + x) varies over the total length or over part of the length.
11. Method according to one of claims 7 to 10, characterized in that a metal strip (n + x) with a varying wall thickness over its length and a further metal strip (n + x) with a varying wall thickness over its length are welded to each other at the end sides, or in that a metal strip (n + x) with a varying wall thickness over its length and a metal strip (n + x) with a constant wall thickness over its length are welded to each other at the end sides, wherein the metal strips (n + x) each form a tube section with the same nominal wall thickness at the end to be welded.
12. Use of a tube (2) with helical seam according to any of claims 1 to 6 for building a tower structure for housing a wind turbine.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019201341.4 | 2019-02-01 | ||
| DE102019201341 | 2019-02-01 | ||
| DE102019211936.0A DE102019211936A1 (en) | 2019-02-01 | 2019-08-08 | Screw seam tube and method for producing a screw seam tube |
| DE102019211936.0 | 2019-08-08 | ||
| PCT/EP2020/050622 WO2020156783A1 (en) | 2019-02-01 | 2020-01-13 | Tube having a helical seam and method for producing a tube having a helical seam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113056338A true CN113056338A (en) | 2021-06-29 |
Family
ID=71615491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080006260.3A Pending CN113056338A (en) | 2019-02-01 | 2020-01-13 | Pipe with helical seam and method for producing a pipe with helical seam |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN113056338A (en) |
| DE (1) | DE102019211936A1 (en) |
| WO (1) | WO2020156783A1 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2100307A (en) * | 1936-02-20 | 1937-11-23 | Wiley W Mcminn | Hollow metal shaft and manufacture of same |
| JPH0751743A (en) * | 1993-08-10 | 1995-02-28 | Sumitomo Metal Ind Ltd | Band steel having different thicknesses in longitudinal direction and steel pipe using same as base stock |
| US20100095508A1 (en) * | 2008-10-22 | 2010-04-22 | Lincoln Global, Inc. | Spirally welded conical tower sections |
| US20110179623A1 (en) * | 2010-01-25 | 2011-07-28 | Eric Smith | Tapered Spiral Welded Structure |
| DE102011051057A1 (en) * | 2011-06-14 | 2012-09-06 | Muhr Und Bender Kg | Method for manufacturing tube for exhaust systems of motor vehicles, involves generating regions of higher thickness and other regions of lower thickness in longitudinal direction of strip material |
| WO2016210248A1 (en) * | 2015-06-26 | 2016-12-29 | Keystone Tower Systems, Inc. | Spiral forming |
| US20180193893A1 (en) * | 2017-01-12 | 2018-07-12 | Keystone Tower Systems, Inc. | Cylindrical tube formation |
| CN109072369A (en) * | 2016-04-22 | 2018-12-21 | 山特维克知识产权股份有限公司 | The method of pipe and manufacture pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1574563A (en) * | 1921-09-06 | 1926-02-23 | Albert W Heinle | Metallic structure and structural unit |
-
2019
- 2019-08-08 DE DE102019211936.0A patent/DE102019211936A1/en active Pending
-
2020
- 2020-01-13 WO PCT/EP2020/050622 patent/WO2020156783A1/en active Application Filing
- 2020-01-13 CN CN202080006260.3A patent/CN113056338A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2100307A (en) * | 1936-02-20 | 1937-11-23 | Wiley W Mcminn | Hollow metal shaft and manufacture of same |
| JPH0751743A (en) * | 1993-08-10 | 1995-02-28 | Sumitomo Metal Ind Ltd | Band steel having different thicknesses in longitudinal direction and steel pipe using same as base stock |
| US20100095508A1 (en) * | 2008-10-22 | 2010-04-22 | Lincoln Global, Inc. | Spirally welded conical tower sections |
| US20110179623A1 (en) * | 2010-01-25 | 2011-07-28 | Eric Smith | Tapered Spiral Welded Structure |
| DE102011051057A1 (en) * | 2011-06-14 | 2012-09-06 | Muhr Und Bender Kg | Method for manufacturing tube for exhaust systems of motor vehicles, involves generating regions of higher thickness and other regions of lower thickness in longitudinal direction of strip material |
| WO2016210248A1 (en) * | 2015-06-26 | 2016-12-29 | Keystone Tower Systems, Inc. | Spiral forming |
| CN109072369A (en) * | 2016-04-22 | 2018-12-21 | 山特维克知识产权股份有限公司 | The method of pipe and manufacture pipe |
| US20180193893A1 (en) * | 2017-01-12 | 2018-07-12 | Keystone Tower Systems, Inc. | Cylindrical tube formation |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020156783A1 (en) | 2020-08-06 |
| DE102019211936A1 (en) | 2020-08-06 |
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