JPS624553B2 - - Google Patents
Info
- Publication number
- JPS624553B2 JPS624553B2 JP56111595A JP11159581A JPS624553B2 JP S624553 B2 JPS624553 B2 JP S624553B2 JP 56111595 A JP56111595 A JP 56111595A JP 11159581 A JP11159581 A JP 11159581A JP S624553 B2 JPS624553 B2 JP S624553B2
- Authority
- JP
- Japan
- Prior art keywords
- bent
- welding
- side portion
- draft tube
- tube liner
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
-
- 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
- Y02E10/20—Hydro energy
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
Description
【発明の詳細な説明】
この発明は水車及びポンプ水車等の水力機械の
エルボ形ドラフトチユーブライナの製作方法に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an elbow-shaped draft tube liner for hydraulic machines such as water turbines and pump water turbines.
ドラフトチユーブライナはその形状が水車やポ
ンプ水車の効率に大きく関係することから、断面
積を徐々に拡大させて流速をなめらかに変化させ
るように設計されている。従来のエルボ形ライナ
は、第１図に示すように各隅にＲ部を有する長方
形断面の筒を多数接続して溶接することにより製
作されていた。各筒の間は第１図、第２図に符号
１乃至１４で示す溶接線Ｗに沿つて全周溶接され
る。なお第２図はチユーブライナ２０の軸線に沿
つて投影した上面図である。第３図は符号３，
５，１４で示される溶接線だけを取出して断面形
状の関係を表わしている。 Draft tube liners are designed to gradually expand their cross-sectional area and smoothly change the flow velocity, as their shape greatly affects the efficiency of water turbines and pump-turbines. A conventional elbow-shaped liner is manufactured by connecting and welding a large number of rectangular cross-section tubes having rounded corners at each corner, as shown in FIG. The entire circumference between each cylinder is welded along welding lines W shown by reference numerals 1 to 14 in FIGS. 1 and 2. Note that FIG. 2 is a top view projected along the axis of the tubular liner 20. In Figure 3, number 3,
Only the welding lines indicated by 5 and 14 are taken out to represent the relationship between the cross-sectional shapes.
従来のこのような製作方法では、流速をなめら
かに変化させるためできるだけ多くの長方形の筒
に分割しかつそれぞれを全周にわたつて溶接し成
形することが必要となるから、必然的に溶接線が
多くなり、溶接工数及び溶接部非破壊検査のため
の製造コストが増大する欠点があつた。 In this conventional manufacturing method, in order to smoothly change the flow velocity, it is necessary to divide the cylinder into as many rectangular cylinders as possible and weld and form each cylinder around the entire circumference, which inevitably results in a weld line. This has the drawback of increasing the number of welding steps and the manufacturing cost for non-destructive inspection of the welded part.
この発明は上記のような欠点を除去し、製作方
法を変えることによつて溶接工数を低減し溶接部
の信頼性の向上を図ることを目的とする。 The object of the present invention is to eliminate the above-mentioned drawbacks, reduce the number of welding steps, and improve the reliability of the welded part by changing the manufacturing method.
この発明によれば上記の目的は、ドラフトチユ
ーブライナを隣接する２つのＲ部を含む第１側部
と、他の２つのＲ部を含む第２側部と、屈曲部分
の内側に沿つて延伸する内面部と、屈曲部分の外
側に沿つて延伸する外面部との４区画に分離して
成形し、第１側部及び第２側部はそれぞれ所定の
幅でコ形に屈曲した分割片を多数溶接して接合形
成し、前記内面部及び外面部は第１側部及び第２
側部の側端縁に合せて折り曲げかつ前記側端縁に
沿つて第１側部及び第２側部に溶接し、これによ
り全体を一体に形成することによつて達せられ
る。すなわち、従来内面部及び外面部に設けられ
ていた溶接線の大部分を省略し折り曲げ線とする
ことによつて溶接工数を低減するものである。 According to the present invention, the above object is achieved by extending the draft tube liner along a first side portion including two adjacent R portions, a second side portion including the other two R portions, and an inner side of a bent portion. The first side part and the second side part each have a divided piece bent in a U-shape with a predetermined width. A plurality of welds are performed to form a joint, and the inner surface portion and the outer surface portion are connected to the first side portion and the second side portion.
This is accomplished by bending the lateral edges of the lateral sections and welding them along the lateral edges to the first and second lateral sections, thereby forming the whole in one piece. That is, most of the welding lines conventionally provided on the inner and outer surfaces are omitted and replaced with bent lines, thereby reducing the number of welding steps.
以下この発明の実施例を図面にもとづいて説明
する。第４図乃至第６図に示すように、この発明
ではチユーブライナ２０を、隣接する２つのＲ部
を含む第１側部２１と、他の２つのＲ部を含む第
２側部２２と、屈曲部分の内側に沿つて延伸する
内面部２３と、屈曲部分の外側に沿つて延伸する
外面部２４との４区画に分離して成形する。第１
側部２１は所定の幅でコ形に屈曲した分割片３
１，３２，３３等を溶接して接合形成し、同様に
第２側部２２も所定の幅でコ形に屈曲した分割片
４１，４２，４３等を溶接して接合形成する。 Embodiments of the present invention will be described below based on the drawings. As shown in FIGS. 4 to 6, in the present invention, the tube liner 20 has a first side portion 21 including two adjacent R portions, a second side portion 22 including the other two R portions, It is molded separately into four sections: an inner surface portion 23 extending along the inside of the bent portion, and an outer surface portion 24 extending along the outside of the bent portion. 1st
The side portion 21 is a divided piece 3 bent in a U-shape with a predetermined width.
1, 32, 33, etc. are welded to form a joint. Similarly, the second side portion 22 is also welded to form a joint by welding divided pieces 41, 42, 43, etc. bent in a U-shape with a predetermined width.
内面部２３及び外面部２４は第１側部２１及び
第２側部２２の側端縁の屈曲線に合致する形状に
折り曲げておき、側端縁に沿つて第１側部２１及
び第２側部２２に溶接する。かくしてチユーブラ
イナが一体に形成される。第６図は符号３，５，
１４で示される溶接線の部分だけを取出して断面
の相互関係を表わしている。 The inner surface part 23 and the outer surface part 24 are bent into a shape that matches the bending lines of the side edges of the first side part 21 and the second side part 22, and Weld to part 22. In this way, the tube liner is integrally formed. Figure 6 shows numbers 3, 5,
Only the part of the weld line indicated by 14 is taken out to show the interrelationship of the cross sections.
この発明の方法によれば、各側部２１，２２の
側端縁に沿う溶接線Ａ（第５図の実線）が新たに
設けられるが、従来必要であつた内面部及び外面
部の中央部分の溶接線Ｂ（第５図の鎖線）が不要
となり、全体として見れば溶接線が大幅に削減さ
れることになる。従つて、溶接工数の低減により
製造コストが低下しかつ溶接部の信頼性が向上す
る。 According to the method of the present invention, a new welding line A (solid line in FIG. 5) is provided along the side edges of each of the side parts 21 and 22, but the welding line A (solid line in FIG. The welding line B (dashed line in FIG. 5) becomes unnecessary, and the number of welding lines can be significantly reduced when viewed as a whole. Therefore, the manufacturing cost is lowered by reducing the number of welding steps, and the reliability of the welded part is improved.
第１図は従来のドラフトチユーブの溶接線を示
す側面図、第２図は第１図のドラフトチユーブの
軸線に沿つて投影した上面図、第３図は一部の溶
接線だけを取出して示す概略図、第４図はこの発
明に基づくドラフトチユーブの溶接線を示す側面
図、第５図は第４図のドラフトチユーブの軸線に
沿つて投影した上面図、第６図は一部の溶接線だ
けを取出して示す概略図である。
２０……ドラフトチユーブライナ、２１……第
１側部、２２……第２側部、２３……内面部、２
４……外面部、３１，４１……分割片。
Figure 1 is a side view showing the welding line of a conventional draft tube, Figure 2 is a top view projected along the axis of the draft tube in Figure 1, and Figure 3 shows only a part of the welding line. Schematic diagram, FIG. 4 is a side view showing welding lines of the draft tube according to the present invention, FIG. 5 is a top view projected along the axis of the draft tube in FIG. 4, and FIG. 6 is a partial welding line. FIG. 20... Draft tube liner, 21... First side part, 22... Second side part, 23... Inner surface part, 2
4...Outer surface part, 31, 41... Divided piece.
Claims (1)
曲させた形状のドラフトチユーブライナを製作す
る方法において、該チユーブライナを隣接する２
つのＲ部を含む第１側部と、他の２つのＲ部を含
む第２側部と、屈曲部分の内側に沿つて延伸する
内面部と、屈曲部分の外側に沿つて延伸する外面
部との４区画に分離して成形し、第１側部及び第
２側部はそれぞれ所定の幅でコ形に屈曲した分割
片を多数溶接して接合形成し、前記内面部及び外
面部は第１側部及び第２側部の側端縁に合せて折
り曲げかつ前記側端縁に沿つて第１側部及び第２
側部に溶接し、これにより全体を一体に形成する
ことを特徴とするドラフトチユーブライナの製作
方法。1. In a method of manufacturing a draft tube liner having a rectangular cross section that is continuously bent and has an R section at each corner, the tube liner is
a first side portion including one R portion; a second side portion including two other R portions; an inner surface portion extending along the inside of the bent portion; and an outer surface portion extending along the outside of the bent portion. The first side part and the second side part are each formed by welding and joining a number of divided pieces bent in a U-shape with a predetermined width, and the inner surface part and the outer surface part The first side portion and the second side portion are bent along the side edges of the side portion and the second side portion, and
A method for manufacturing a draft tube liner, which is characterized by welding the side portions and thereby forming the entire draft tube liner in one piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56111595A JPS5813170A (en) | 1981-07-17 | 1981-07-17 | Manufacturing method of draft tube liner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56111595A JPS5813170A (en) | 1981-07-17 | 1981-07-17 | Manufacturing method of draft tube liner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5813170A JPS5813170A (en) | 1983-01-25 |
| JPS624553B2 true JPS624553B2 (en) | 1987-01-30 |
Family
ID=14565337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56111595A Granted JPS5813170A (en) | 1981-07-17 | 1981-07-17 | Manufacturing method of draft tube liner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5813170A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01151554U (en) * | 1988-03-31 | 1989-10-19 | ||
| JPH02121542U (en) * | 1989-03-17 | 1990-10-03 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4754036B1 (en) * | 2011-02-02 | 2011-08-24 | 三枝子 三浦 | Auxiliary pillow for elbow pillow |
-
1981
- 1981-07-17 JP JP56111595A patent/JPS5813170A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01151554U (en) * | 1988-03-31 | 1989-10-19 | ||
| JPH02121542U (en) * | 1989-03-17 | 1990-10-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5813170A (en) | 1983-01-25 |
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