JP2018141582A - Method for producing superheated steam generating apparatus and conductor pipe used for the apparatus - Google Patents
Method for producing superheated steam generating apparatus and conductor pipe used for the apparatus Download PDFInfo
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- JP2018141582A JP2018141582A JP2017035507A JP2017035507A JP2018141582A JP 2018141582 A JP2018141582 A JP 2018141582A JP 2017035507 A JP2017035507 A JP 2017035507A JP 2017035507 A JP2017035507 A JP 2017035507A JP 2018141582 A JP2018141582 A JP 2018141582A
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- 239000004020 conductor Substances 0.000 title claims abstract description 93
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 230000006698 induction Effects 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 230000004907 flux Effects 0.000 claims abstract description 11
- 238000005304 joining Methods 0.000 claims description 54
- 238000004804 winding Methods 0.000 claims description 33
- 238000003466 welding Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000035882 stress Effects 0.000 description 6
- 230000020169 heat generation Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/14—Tools, e.g. nozzles, rollers, calenders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/027—Making tubes with soldering or welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
- F22G1/16—Steam superheating characterised by heating method by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil
- F22G1/165—Steam superheating characterised by heating method by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil by electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Engineering & Computer Science (AREA)
- General Induction Heating (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
本発明は、螺旋状に巻回した導体管を誘導加熱することによって当該導体管内を流れる水蒸気を加熱して過熱水蒸気を生成する過熱水蒸気生成装置に関するものである。 The present invention relates to a superheated steam generating device that generates superheated steam by heating steam flowing in the conductor pipe by induction heating a spirally wound conductor pipe.
従来、この種の流体加熱装置では、特許文献１に示すように、二次コイルを形成する螺旋状に巻回した導体管において、巻回部分の互いに隣接する導体管同士を短絡させて短絡回路を構成して、電気的リアクタンスを低減させて加熱効率を向上させたものが知られている。 Conventionally, in this type of fluid heating device, as shown in Patent Document 1, in a conductor tube wound in a spiral shape to form a secondary coil, the conductor tubes adjacent to each other in the wound portion are short-circuited. And the heating efficiency is known by reducing the electrical reactance.
ここで、上記の短絡回路は、巻回部分の周方向の一部に螺旋の軸方向に延びる電気接続部材を溶接等により接続することにより、或いは、巻回部分の互いに隣接する導体管同士を部分的に溶接接合することにより構成されている。 Here, the short circuit is formed by connecting an electrical connection member extending in the axial direction of the spiral to a part of the winding portion in the circumferential direction by welding or the like, or connecting the conductor tubes adjacent to each other in the winding portion. It is configured by partial welding.
しかしながら、接合部である電気接続部材や溶接部分には、短絡電流が集中するために高温になったり、導体管の巻回部分の熱膨張による変形によって応力が発生したりして、接合部や導体管が破損するおそれが生じる。 However, the electrical connection member and the welded portion, which are joint portions, are heated due to concentration of short-circuit current, or stress is generated due to deformation due to thermal expansion of the winding portion of the conductor tube, and the joint portions and There is a risk of damage to the conductor tube.
そこで本発明は、上記問題点を解決すべくなされたものであり、導体管に短絡回路を構成して電気的リアクタンスを低減させつつ、接合部及び導体管における破損の可能性を小さくすることをその主たる課題とするものである。 Accordingly, the present invention has been made to solve the above-described problems, and it is possible to reduce the possibility of breakage in the joint portion and the conductor tube while reducing the electrical reactance by forming a short circuit in the conductor tube. This is the main issue.
すなわち本発明に係る過熱水蒸気生成装置は、螺旋状に巻回された円管状の導体管を、当該導体管の巻回部分の内側又は外側に設けられた磁束発生機構により誘導加熱し、前記導体管内を流れる水蒸気を加熱して過熱水蒸気を生成する過熱水蒸気生成装置であって、前記導体管の巻回部分において、互いに隣り合う隣接部の互いに対向する面が、周方向略全体に亘って、導電性を有する接合要素によって接合されており、前記接合要素の厚さは、前記導体管の管厚以上であることを特徴とする。 That is, the superheated steam generating device according to the present invention induction-heats a spirally wound circular conductor tube by a magnetic flux generation mechanism provided inside or outside the winding portion of the conductor tube, and the conductor In the superheated steam generator for heating the steam flowing in the pipe to generate the superheated steam, the mutually facing surfaces of the adjacent portions adjacent to each other in the winding portion of the conductor pipe span the substantially entire circumferential direction. It is joined by the joining element which has electroconductivity, The thickness of the said joining element is more than the pipe | tube thickness of the said conductor pipe, It is characterized by the above-mentioned.
このようなものであれば、導体管の巻回部分において互いに隣り合う隣接部が、周方向略全体に亘って接合要素により接合（全周接合）されているので、部分的に接合した場合の熱膨張による接合部への応力集中を避けることができ、接合部及び導体管における破損の可能性を小さくすることができる。また、導体管は円管状をなすものであり、互いに隣り合う隣接部の間には凹部が形成されるため、当該凹部に接合要素を設けることにより、接合要素と導体管の外側周面との接触面積を増やすことができる。この構成によっても、接合部への応力集中をさせることができる。 If it is such, since the adjacent part mutually adjacent in the winding part of a conductor pipe is joined by the joining element over the whole circumferential direction (all circumference joining), when it joins partially Stress concentration on the joint due to thermal expansion can be avoided, and the possibility of breakage in the joint and the conductor tube can be reduced. In addition, the conductor tube has a circular tube shape, and a recess is formed between adjacent adjacent portions. Therefore, by providing a joining element in the recess, the joining element and the outer peripheral surface of the conductor tube are formed. The contact area can be increased. This configuration can also concentrate stress on the joint.
ここで、磁束発生機構の誘導コイルからの導体管と接合要素との距離が同じであれば、接合要素の厚さは、導体管の管厚と同じ値であることが理想的である。
しかし、導体管は円管状をなすものであり、互いに隣り合う隣接部の間に接合要素を設ける構成では、誘導コイルからの接合要素の距離は、導体管に比べて大きくなる。誘導コイルからの距離が大きいと磁気結合が弱まり、誘導起電圧が低くなるため、この部分の発熱量は低下する。
このように導体管と接合要素とに温度差が発生すると、熱伸び差により機械応力がかかり、割れ等の破損原因となるため、できる限り発熱量の均一化を図ることが重要である。
接合要素の厚さを導体管の管厚以上にすることで、接合要素の抵抗値を低下させることができ、電流が増加することで接合要素の発熱量を増加させることができる。その結果、導体管と接合要素との発熱量の均一化を図ることができる。
Here, if the distance between the conductor tube and the joining element from the induction coil of the magnetic flux generation mechanism is the same, the thickness of the joining element is ideally the same value as the tube thickness of the conductor tube.
However, the conductor tube has a circular tubular shape, and in the configuration in which the joining element is provided between adjacent portions adjacent to each other, the distance of the joining element from the induction coil is larger than that of the conductor tube. When the distance from the induction coil is large, the magnetic coupling is weakened and the induced electromotive voltage is lowered, so that the amount of heat generated in this portion is reduced.
When a temperature difference occurs between the conductor tube and the joining element in this way, mechanical stress is applied due to the difference in thermal elongation, causing damage such as cracking. Therefore, it is important to make the amount of heat generation as uniform as possible.
By setting the thickness of the joining element to be equal to or greater than the thickness of the conductor tube, the resistance value of the joining element can be reduced, and the amount of heat generated by the joining element can be increased by increasing the current. As a result, the amount of heat generated between the conductor tube and the joining element can be made uniform.
前記接合要素としては、溶接接合により形成されたものであることが考えられる。溶接接合の場合には、互いに隣り合う隣接部の間の凹部に溶融金属材料を盛り易い構造のため、その溶接作業を容易にすることができる。 It is conceivable that the joining element is formed by welding joining. In the case of welding joining, the welding operation can be facilitated because of the structure in which the molten metal material can be easily deposited in the recesses between adjacent portions.
厚さの大小による調整によって発熱量の均一化しやすくするためには、前記溶接要素の材質の比抵抗が、前記導体管の材質の比抵抗と略同一であることが望ましい。 In order to facilitate the uniform heat generation by adjusting the thickness, the specific resistance of the material of the welding element is preferably substantially the same as the specific resistance of the material of the conductor tube.
導体管の巻回部分への全周接合の作業性を考慮した場合には、前記接合要素は、前記巻回部分の外面側に設けられていることが望ましい。また、電磁誘導の磁気結合を良くするためには、前記磁束発生機構は、前記導体管の巻回部分の内側及び外側の両方に設けられていることが望ましい。 In consideration of workability of all-around joining to the winding portion of the conductor tube, it is desirable that the joining element is provided on the outer surface side of the winding portion. Further, in order to improve the magnetic coupling of electromagnetic induction, it is desirable that the magnetic flux generation mechanism is provided both inside and outside the winding portion of the conductor tube.
前記接合要素は、前記互いに隣り合う隣接部により形成される凹部内に収まっていることが望ましい。この構成であれば、導体管の巻回部分の外側又は内側に配置される磁束発生機構の径方向のサイズが大きくなってしまうことを防ぐことができる。 It is desirable that the joining element is housed in a recess formed by the adjacent portions adjacent to each other. If it is this structure, it can prevent that the size of the radial direction of the magnetic flux generation mechanism arrange | positioned on the outer side or the inner side of the winding part of a conductor tube becomes large.
また、本発明に係る導体管の製造方法は、過熱水蒸気生成装置に用いられるものであって、誘導加熱されることにより内部を流れる水蒸気を加熱して過熱水蒸気を生成するための導体管の製造方法であり、螺旋状に巻回された円管状の導体管の巻回部分の略全体において、互いに隣り合う隣接部の互いに対向する面を溶接接合するとともに、前記溶接接合の肉盛厚は、前記導体管の管厚以上とすることを特徴とする。 In addition, the method for manufacturing a conductor tube according to the present invention is used in a superheated steam generator, and the conductor tube for generating superheated steam by heating the steam flowing inside by induction heating. The method is a method in which, in substantially the entire winding portion of a spirally wound tubular conductor tube, the mutually adjacent surfaces of adjacent portions are welded together, and the overlay thickness of the welded joint is: The thickness is not less than the thickness of the conductor tube.
このように構成した本発明によれば、導体管の巻回部分において互いに隣り合う隣接部が、周方向全体に亘って接合要素により接合されているので、導体管に短絡回路を構成して電気的リアクタンスを低減させつつ、接合部及び導体管における破損の可能性を小さくすることができる。 According to the present invention configured as described above, adjacent portions adjacent to each other in the winding portion of the conductor tube are joined by the joining element over the entire circumferential direction. The possibility of breakage in the joint and the conductor tube can be reduced while reducing the reactive reactance.
以下に本発明に係る過熱水蒸気生成装置１００の一実施形態について図面を参照して説明する。 Hereinafter, an embodiment of a superheated steam generator 100 according to the present invention will be described with reference to the drawings.
この過熱水蒸気生成装置１００は、図１に示すように、水又は水蒸気を加熱して１００℃超（２００℃〜２０００℃）の過熱蒸気を生成するものであり、螺旋状に巻回された円管状の導体管２と、当該導体管２を誘導加熱するための磁束発生機構３とを有している。 As shown in FIG. 1, this superheated steam generator 100 heats water or steam to generate superheated steam exceeding 100 ° C. (200 ° C. to 2000 ° C.), and is a spirally wound circle. It has a tubular conductor tube 2 and a magnetic flux generating mechanism 3 for inductively heating the conductor tube 2.
導体管２は、１本の金属製の管から形成され、螺旋状に巻回された巻回部分２ｘを有するものであり、一方の端部には、水又は水蒸気が導入される導入ポートＰ１が形成され、他方の端部には、生成された過熱水蒸気を導出する導出ポートＰ２が形成されている。導入ポートＰ１には、水又は水蒸気を導体管２に供給するための外部配管が接続され、導出ポートＰ２には、生成された過熱水蒸気を利用側（例えば熱処理室）に供給するための外部配管が接続される。 The conductor tube 2 is formed of a single metal tube and has a spirally wound portion 2x. One end of the conductor tube 2 is an introduction port P1 into which water or water vapor is introduced. Is formed, and at the other end, a lead-out port P2 for leading the generated superheated steam is formed. An external pipe for supplying water or water vapor to the conductor tube 2 is connected to the introduction port P1, and an external pipe for supplying the generated superheated water vapor to the use side (for example, heat treatment chamber). Is connected.
磁束発生機構３は、鉄心３１と、当該鉄心３１に沿って巻回された誘導コイル３２とを備えている。この誘導コイル３２には、図示しない交流電源が接続されており、制御された電力が供給されるものである。交流電源により電力が供給される誘導コイル３１が一次コイルとなり、当該一次コイルにより給電された結果、導体管２に誘導電流が流れて、導体管２が二次コイルとなる。 The magnetic flux generation mechanism 3 includes an iron core 31 and an induction coil 32 wound along the iron core 31. The induction coil 32 is connected to an AC power source (not shown) and is supplied with controlled power. The induction coil 31 to which electric power is supplied from the AC power source becomes a primary coil, and as a result of being fed by the primary coil, an induction current flows through the conductor tube 2 and the conductor tube 2 becomes a secondary coil.
本実施形態の誘導コイル３２は、導体管２の巻回部分２ｘと同軸上に配置されており、巻回部分２ｘの内側に配置された内側誘導コイル３２ａと、巻回部分の外側に配置された外側誘導コイル３２ｂとを有する。このように巻回部分２ｘの内外両方に誘導コイル３２ａ、３２ｂを配置することによって、電磁誘導の磁気結合を良くして、導体管２に誘導電流が流れやすくなり、水蒸気の加熱効率（過熱水蒸気の生成効率）を向上させることができる。 The induction coil 32 of the present embodiment is arranged coaxially with the winding portion 2x of the conductor tube 2, and is arranged outside the winding portion with an inner induction coil 32a arranged inside the winding portion 2x. And an outer induction coil 32b. By arranging the induction coils 32a and 32b both inside and outside the winding portion 2x as described above, the magnetic coupling of electromagnetic induction is improved, the induced current easily flows through the conductor tube 2, and the heating efficiency of steam (superheated steam) Production efficiency).
そして、本実施形態では、図２及び図３に示すように、導体管２の巻回部分２ｘにおいて、互いに隣り合う隣接部２０の互いに対向する面が、周方向略全体に亘って、導電性を有する接合要素４によって接合されている。つまり、接合要素４は、導体管２の巻回部分２の螺旋全周に亘って設けられている。 And in this embodiment, as shown in FIG.2 and FIG.3, in the winding part 2x of the conductor tube 2, the mutually opposing surfaces of the adjacent parts 20 adjacent to each other are electrically conductive over substantially the entire circumferential direction. Are joined by a joining element 4 having That is, the joining element 4 is provided over the entire circumference of the spiral portion 2 of the conductor tube 2.
具体的に接合要素４は、溶接接合により形成されたもの（以下、接合溶接部ともいう。）である。つまり、導体管２の巻回部分２ｘにおいて、互いに隣り合う隣接部２０の互いに対向する面は、螺旋全体に亘って全周接合されている（図２参照）。また、接合要素４の材質の比抵抗と導体管２の材質の比抵抗とは略同一としてある。ここで、接合要素４の材質と導体管２の材質とは同じであることが望ましい。これにより、比抵抗を同一にできるだけでなく、熱膨張率も同一であり温度上昇時に発生する熱応力を低減することができる。また、溶接接合は、一定の送り速度でトーチと溶接部位との距離を一定に保つことが重要であることから、自動溶接機を用いて行うことが望ましい。なお、導体管２の隣接部２０の間には最初から開先が存在するので、開先加工の必要はない。 Specifically, the joining element 4 is formed by welding joining (hereinafter also referred to as a joining welded portion). That is, in the winding portion 2x of the conductor tube 2, the mutually adjacent surfaces of the adjacent portions 20 adjacent to each other are joined all around the entire spiral (see FIG. 2). The specific resistance of the material of the joining element 4 and the specific resistance of the material of the conductor tube 2 are substantially the same. Here, it is desirable that the material of the joining element 4 and the material of the conductor tube 2 are the same. Thereby, not only the specific resistance can be made the same, but also the thermal expansion coefficient is the same, and the thermal stress generated when the temperature rises can be reduced. In addition, since it is important to keep the distance between the torch and the welded part constant at a constant feed rate, it is desirable to perform welding joining using an automatic welder. Since there is a groove between the adjacent portions 20 of the conductor tube 2 from the beginning, there is no need for groove processing.
さらに、図３に示すように、接合要素４の厚さは、導体管２の管厚以上である。つまり、接合要素４である溶接接合による肉盛厚さが、導体管２の管厚以上である。接合要素４は、互いに隣り合う隣接部２０により形成される凹部２０Ｍ内に収まっている。より具体的に接合要素４は、互いに隣り合う隣接部２０の接触箇所２０ｃ又はその近傍から、凹部２０Ｍ内に収まる範囲において所定厚さで形成されている。つまり、螺旋の軸方向（巻回部分２ｘの中心軸方向）に直交する方向において、導体管２の外端部分が、接合要素４の外端部分よりも外側に位置するように構成されている。 Furthermore, as shown in FIG. 3, the thickness of the joining element 4 is equal to or greater than the tube thickness of the conductor tube 2. That is, the build-up thickness by welding joining which is the joining element 4 is more than the pipe thickness of the conductor pipe 2. The joining element 4 is accommodated in the recessed part 20M formed by the adjacent parts 20 adjacent to each other. More specifically, the joining element 4 is formed with a predetermined thickness within a range that can be accommodated in the recess 20M from or near the contact location 20c of the adjacent portions 20 adjacent to each other. That is, the outer end portion of the conductor tube 2 is configured to be located outside the outer end portion of the joining element 4 in a direction orthogonal to the axial direction of the spiral (the central axis direction of the winding portion 2x). .
図３等では、接合要素４は、導体管２の巻回部分２の内面側及び外面側の両方に設けられているが、導体管２の巻回部分２ｘへの全周接合の作業性を考慮した場合には、接合要素４は、巻回部分２ｘの外面側のみに設けられていることが望ましい。 In FIG. 3 etc., although the joining element 4 is provided in both the inner surface side and the outer surface side of the winding part 2 of the conductor tube 2, the workability of all the circumference joining to the winding part 2x of the conductor tube 2 is improved. In consideration, it is desirable that the joining element 4 is provided only on the outer surface side of the winding portion 2x.
図４に示すように、巻回部分２ｘの隣接部２０における接触箇所と肉盛り部（接合溶接部４）との間には、作業上少しの隙間ができる場合があるが、その隙間寸法をΔとすると、０＜Δ＜数ｍｍ程度となる。例えば、１時間に１２００℃で２４０ｋｇの過熱水蒸気を発生させるための導体管２は、直径が４８．３ｍｍ、管厚は３．７ｍｍである。この導体管２の巻回部分２ｘを全周溶接して、肉盛厚さを５ｍｍとした場合に、Δは約２．５ｍｍとなった。 As shown in FIG. 4, there may be a slight gap in the work between the contact portion in the adjacent portion 20 of the winding portion 2x and the build-up portion (joint weld portion 4). If Δ, 0 <Δ <several mm. For example, the conductor tube 2 for generating 240 kg of superheated steam at 1200 ° C. per hour has a diameter of 48.3 mm and a tube thickness of 3.7 mm. When the winding portion 2x of the conductor tube 2 was welded all around and the build-up thickness was 5 mm, Δ was about 2.5 mm.
水蒸気を通流させる程の寸法である導体管２であれば、管厚と肉盛厚さとが等しい場合、磁束発生機構３の誘導コイル３２からの距離は接合溶接部４の方が大きくなる。導体管２の肉厚をｔ、接合溶接部４の肉盛厚さをＴとすれば、Ｔ＞ｔとすることで接合溶接部４の電流を増加させて発熱量を増加させることができる。 In the case of the conductor tube 2 having a dimension that allows water vapor to flow, the distance from the induction coil 32 of the magnetic flux generation mechanism 3 is greater in the welded joint 4 when the tube thickness and the build-up thickness are equal. If the thickness of the conductor tube 2 is t and the build-up thickness of the welded joint 4 is T, the current of the welded joint 4 can be increased and the amount of heat generated can be increased by setting T> t.
Ｔ＝ｔのときに、導体管２の誘起電圧が、接合溶接部４よりも高くなる場合を〇印として以下の表に示す。 The case where the induced voltage of the conductor tube 2 becomes higher than that of the weld joint 4 when T = t is shown in the following table as ◯.
発熱量は誘起電圧だけでなく、導体管２及び接合溶接部４の抵抗値にも関係する。すなわち、抵抗値が低ければ大きな電流が流れることで発熱量は増加する。 The amount of heat generation is related not only to the induced voltage but also to the resistance values of the conductor tube 2 and the joint weld 4. That is, if the resistance value is low, a large amount of current flows and the amount of heat generation increases.
誘起電圧が発生する接合溶接部４の周長が、導体管２の巻回部分２ｘよりも長くなる場合を「〇」、短くなる場合を「×」としてまとめた表を以下に示す。 A table summarizing the case where the circumference of the welded joint 4 where the induced voltage is generated becomes longer than the winding portion 2x of the conductor tube 2 as “◯” and the case where it becomes shorter as “X” is shown below.
表２の「〇」の位置における肉盛厚さＴの最大値は、導体管２の直径をΦとした場合に、（Ｔ＋Δ）＜Φ／２の範囲となる。 The maximum value of the build-up thickness T at the position “◯” in Table 2 is in the range of (T + Δ) <Φ / 2 when the diameter of the conductor tube 2 is Φ.
＜本実施形態の効果＞
このように構成した過熱水蒸気生成装置１００によれば、導体管２の巻回部分２ｘにおいて互いに隣り合う隣接部２０が、周方向略全体に亘って接合要素４により接合（全周接合）されているので、部分的に接合した場合の熱膨張による接合部への応力集中を避けることができ、接合部及び導体管における破損の可能性を小さくすることができる。また、導体管２は円管状をなすものであり、互いに隣り合う隣接部２０の間には凹部２０Ｍが形成されるため、当該凹部２０Ｍに接合要素４を設けることにより、接合要素４と導体管２の外側周面との接触面積を増やすことができる。この構成によっても、接合部への応力集中をさせることができる。
<Effect of this embodiment>
According to the superheated steam generating device 100 configured as described above, the adjacent portions 20 adjacent to each other in the winding portion 2x of the conductor tube 2 are joined (all-around joined) by the joining element 4 over substantially the entire circumferential direction. Therefore, it is possible to avoid stress concentration at the joint due to thermal expansion when partially joined, and to reduce the possibility of damage at the joint and the conductor tube. The conductor tube 2 has a circular tube shape, and a recess 20M is formed between the adjacent portions 20 adjacent to each other. Therefore, by providing the joint element 4 in the recess 20M, the joint element 4 and the conductor tube are formed. The contact area with the outer peripheral surface of 2 can be increased. This configuration can also concentrate stress on the joint.
接合要素４の厚さＴを導体管２の管厚ｔ以上にしているので、接合要素４の抵抗値を低下させることができ、電流が増加することで発熱量を増加させることができる。 Since the thickness T of the joining element 4 is equal to or greater than the pipe thickness t of the conductor tube 2, the resistance value of the joining element 4 can be reduced, and the amount of heat generated can be increased by increasing the current.
また、接合要素４は、溶接接合により形成されたものであるので、互いに隣り合う隣接部２０の間の凹部２０Ｍに溶融金属材料を盛り易い構造のため、その溶接作業を容易にすることができる。 Moreover, since the joining element 4 is formed by welding joining, since it is a structure which is easy to pour molten metal material in the recessed part 20M between the adjacent parts 20 mutually adjacent, the welding operation can be made easy. .
＜その他の変形実施形態＞
なお、本発明は前記各実施形態に限られるものではない。
<Other modified embodiments>
The present invention is not limited to the above embodiments.
例えば、前記実施形態では、接合要素４が接合溶接により形成されたものであったが、ロー付けにより形成されたものであっても良い。また、導体管とは別に設けられた接続用部材を巻回部分の隣接部に沿って巻き付けて当該接続用部材を導体管２に溶接又はロー付け等により接続することによって、前記接続用部材を接合要素４としても良い。 For example, in the said embodiment, although the joining element 4 was formed by joining welding, it may be formed by brazing. Further, the connection member provided separately from the conductor tube is wound along the adjacent portion of the winding portion, and the connection member is connected to the conductor tube 2 by welding or brazing. The joining element 4 may be used.
その他、本発明は前記実施形態に限られず、その趣旨を逸脱しない範囲で種々の変形が可能であるのは言うまでもない。 In addition, it goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
１００・・・過熱水蒸気生成装置
２ ・・・導体管
２０ ・・・隣接部
２０Ｍ・・・凹部
３ ・・・磁束発生機構
４ ・・・接合要素
ｔ ・・・管厚
Ｔ ・・・肉盛厚さ
DESCRIPTION OF SYMBOLS 100 ... Superheated steam generator 2 ... Conductor tube 20 ... Adjacent part 20M ... Concave part 3 ... Magnetic flux generation mechanism 4 ... Joining element t ... Pipe thickness T ... Overlaying thickness
Claims (6)
前記導体管の巻回部分において、互いに隣り合う隣接部の互いに対向する面が、周方向略全体に亘って、導電性を有する接合要素によって接合されており、
前記接合要素の厚さは、前記導体管の管厚以上である過熱水蒸気生成装置。 A spirally wound cylindrical conductor tube is induction-heated by a magnetic flux generation mechanism provided inside or outside the winding portion of the conductor tube, and the steam flowing in the conductor tube is heated to generate superheated steam. A superheated steam generator for generating,
In the winding portion of the conductor tube, the mutually facing surfaces of adjacent portions adjacent to each other are joined by a joining element having conductivity over substantially the entire circumferential direction,
The superheated steam generator, wherein the thickness of the joining element is equal to or greater than the thickness of the conductor tube.
前記接合要素は、前記巻回部分の外面側に設けられている、請求項１乃至３の何れか一項に記載の過熱水蒸気生成装置。 The magnetic flux generation mechanism is provided both inside and outside the winding portion of the conductor tube,
The superheated steam generator according to any one of claims 1 to 3, wherein the joining element is provided on an outer surface side of the winding portion.
螺旋状に巻回された円管状の導体管の巻回部分の略全体において、互いに隣り合う隣接部の互いに対向する面を溶接接合するとともに、
前記溶接接合の肉盛厚は、前記導体管の管厚以上とする、過熱水蒸気生成装置に用いられる導体管の製造方法。 A method of manufacturing a conductor tube for use in a superheated steam generator, which generates superheated steam by heating steam that flows inside by induction heating,
In substantially the entire winding portion of the spirally wound tubular conductor tube, the mutually facing surfaces of adjacent portions adjacent to each other are welded and joined,
The method for manufacturing a conductor tube used in a superheated steam generator, wherein the build-up thickness of the weld joint is equal to or greater than the tube thickness of the conductor tube.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
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| JP2017035507A JP6886685B2 (en) | 2017-02-27 | 2017-02-27 | A superheated steam generator and a method for manufacturing a conductor tube used in the device. |
| CN201810094583.7A CN108513385B (en) | 2017-02-27 | 2018-01-31 | Superheated steam generator and method for manufacturing conductor tube used for the same |
| CN201820170914.6U CN207969003U (en) | 2017-02-27 | 2018-01-31 | Overheated steam generating means |
| KR1020180012131A KR102492964B1 (en) | 2017-02-27 | 2018-01-31 | Superheated steam generator and method manufacturing conductive pipe used to the superheated steam generator |
| TW107106364A TWI791488B (en) | 2017-02-27 | 2018-02-26 | Superheated steam generating device and method of manufacturing conductor pipe used in the device |
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| JP2017035507A JP6886685B2 (en) | 2017-02-27 | 2017-02-27 | A superheated steam generator and a method for manufacturing a conductor tube used in the device. |
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| CN117773401B (en) * | 2024-02-27 | 2024-05-28 | 中铁市政环境建设有限公司 | Welding device for drainage pipeline |
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| JP6886685B2 (en) | 2021-06-16 |
| TW201831827A (en) | 2018-09-01 |
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| KR20180099464A (en) | 2018-09-05 |
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| KR102492964B1 (en) | 2023-01-30 |
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