JP2021088032A - Cutting device, control device, and cutting method - Google Patents

Cutting device, control device, and cutting method Download PDF

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JP2021088032A
JP2021088032A JP2019219762A JP2019219762A JP2021088032A JP 2021088032 A JP2021088032 A JP 2021088032A JP 2019219762 A JP2019219762 A JP 2019219762A JP 2019219762 A JP2019219762 A JP 2019219762A JP 2021088032 A JP2021088032 A JP 2021088032A
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cutting
cutting blade
cut
cutting device
pressure vessel
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JP7043478B2 (en
Inventor
貴史 吉田
Takashi Yoshida
貴史 吉田
雅則 西崎
Masanori Nishizaki
雅則 西崎
大和 進藤
Yamato Shindo
大和 進藤
文夫 富田
Fumio Tomita
文夫 富田
勇樹 加茂
Yuki Kamo
勇樹 加茂
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Toshiba Plant Systems and Services Corp
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Toshiba Plant Systems and Services Corp
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Priority to JP2021115883A priority patent/JP7197642B2/en
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Abstract

To provide a cutting device excellent in safety and economical efficiency.SOLUTION: The cutting device according to an embodiment includes: a support mechanism fixed into a cut object; a rotary base supported by the support mechanism; a feeding mechanism rotating together with the rotary base; a fixed base movable along the feeding mechanism; a cutting blade arranged on the fixed base; a feed drive machine for performing a feeding operation of pushing out the cutting blade to a cut part of the cut object with the fixed base, and then pulling out the cutting blade from the cut part; and a rotary drive machine for performing rotation operation of displacing the cutting blade pulled out from the cut part in a circumferential direction by rotating the fixed base with the rotary base.SELECTED DRAWING: Figure 1

Description

本発明は、切断装置、制御装置および切断方法に関する。 The present invention relates to a cutting device, a control device and a cutting method.

原子力発電所の廃止措置では、高い放射能を有する原子炉圧力容器（RPV：Reactor Pressure Vessel）を切断して解体する処理が行われる。原子炉圧力容器の切断には、例えば、ガス切断に代表される熱切断方式が用いられる。 In the decommissioning of nuclear power plants, a process of cutting and dismantling a highly radioactive reactor pressure vessel (RPV) is performed. For cutting the reactor pressure vessel, for example, a thermal cutting method typified by gas cutting is used.

特開２００４−６１３９４号公報Japanese Unexamined Patent Publication No. 2004-61394

熱切断方式で原子炉圧力容器を切断する場合には、一般的に、火災予防のための安全装置が設置されるので、機器コストが増加する。 When the reactor pressure vessel is cut by the thermal cutting method, a safety device for fire prevention is generally installed, which increases the equipment cost.

本発明は、安全性および経済性に優れた切断装置、制御装置、および切断方法を提供することを目的とする。 An object of the present invention is to provide a cutting device, a control device, and a cutting method having excellent safety and economy.

一実施形態に係る切断装置は、切断対象物内に固定される支持機構と、支持機構に支持される回転台と、回転台とともに回転する送り機構と、送り機構に沿って移動可能な固定台と、固定台上に配置された切断刃と、固定台が、切断刃を切断対象物の切断箇所へ押し出し、その後、切断刃を切断箇所から引き抜く送り動作を行わせる送り駆動機と、回転台が、固定台を回転させることによって切断箇所から引き抜かれた切断刃を周方向に変位させる回転動作を行わせる回転駆動機と、備える。 The cutting device according to one embodiment includes a support mechanism fixed in an object to be cut, a turntable supported by the support mechanism, a feed mechanism that rotates together with the turntable, and a fixed base that can move along the feed mechanism. The cutting blade placed on the fixed base, the feed drive machine and the rotary base that push the cutting blade to the cutting point of the object to be cut and then pull out the cutting blade from the cutting point. However, it is provided with a rotary drive machine that performs a rotary operation in which the cutting blade pulled out from the cutting portion is displaced in the circumferential direction by rotating the fixed base.

一実施形態に係る制御装置は、上記支持機構の動作を制御する支持制御部と、上記送り動作および上記回転動作を交互に繰り返させる駆動制御部と、を備える。 The control device according to one embodiment includes a support control unit that controls the operation of the support mechanism, and a drive control unit that alternately repeats the feed operation and the rotation operation.

一実施形態に係る切断方法は、切断対象物内で、切断刃を切断箇所へ押し出し、前記切断刃を前記切断箇所から引き抜き、前記切断箇所から引き抜かれた前記切断刃を周方向に変位させ、変位させた前記切断刃を他の切断箇所へ押し出す。 In the cutting method according to one embodiment, the cutting blade is pushed out to the cutting portion in the object to be cut, the cutting blade is pulled out from the cutting portion, and the cutting blade pulled out from the cutting portion is displaced in the circumferential direction. The displaced cutting blade is pushed out to another cutting location.

本発明によれば、安全性および経済性に優れた切断装置、制御装置、および切断方法を提供することが可能となる。 According to the present invention, it is possible to provide a cutting device, a control device, and a cutting method having excellent safety and economy.

第１実施形態に係る切断装置の正面図である。It is a front view of the cutting apparatus which concerns on 1st Embodiment. 図１に示す切断装置の上面図である。It is a top view of the cutting apparatus shown in FIG. 図１に示す切断装置の側面図である。It is a side view of the cutting apparatus shown in FIG. 切断装置による原子炉圧力容器の切断方法を模式的に示す図である。It is a figure which shows typically the method of cutting a reactor pressure vessel by a cutting device. （ａ）〜（ｄ）は、切断刃の軌跡を示す上面図である。(A) to (d) are top views showing the locus of the cutting blade. 他の切断方法を説明するための上面図である。It is a top view for demonstrating another cutting method. 固定ピンを外す作業を説明するための側面図である。It is a side view for demonstrating the work of removing a fixing pin. 交換ユニットを吊り上げる作業を説明するための側面図である。It is a side view for demonstrating the work of lifting a replacement unit. 交換ユニットを吊り下げる作業を説明するための側面図である。It is a side view for demonstrating the work of suspending a replacement unit. 交換ユニットを固定する作業を説明するための側面図である。It is a side view for demonstrating the work of fixing a replacement unit. 第２実施形態に係る切断装置の正面図である。It is a front view of the cutting apparatus which concerns on 2nd Embodiment.

以下、図面を参照して本発明の実施形態を説明する。下記の実施形態は、本発明を限定するものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments do not limit the present invention.

（第１実施形態）
図１は、第１実施形態に係る切断装置の正面図である。図２は、図１に示す切断装置の上面図である。図３は、図１に示す切断装置の側面図である。本実施形態に係る切断装置１は、原子炉圧力容器１００を切断対象物とする。ただし、切断対象物は、原子炉圧力容器１００に限定されず、例えばシュラウド等の円筒状の炉内構造物であってもよい。 (First Embodiment)
FIG. 1 is a front view of the cutting device according to the first embodiment. FIG. 2 is a top view of the cutting device shown in FIG. FIG. 3 is a side view of the cutting device shown in FIG. In the cutting device 1 according to the present embodiment, the reactor pressure vessel 100 is the object to be cut. However, the object to be cut is not limited to the reactor pressure vessel 100, and may be a cylindrical internal structure such as a shroud.

まず、本実施形態に係る切断装置１の構成について説明する。図１〜図３に示すように、切断装置１は、支持機構１１と、フレーム１２と、回転台１３と、送り機構１４と、固定台１５と、交換ユニット１６と、切断刃１７と、送り駆動機１８と、回転駆動機１９と、ガイドプレート２０と、ガイドピン２１、２２と、ケース２３と、を備える。 First, the configuration of the cutting device 1 according to the present embodiment will be described. As shown in FIGS. 1 to 3, the cutting device 1 includes a support mechanism 11, a frame 12, a turntable 13, a feed mechanism 14, a fixing base 15, a replacement unit 16, a cutting blade 17, and a feed. A drive machine 18, a rotary drive machine 19, a guide plate 20, guide pins 21, 22 and a case 23 are provided.

支持機構１１は、支持本体部１１ａおよび延長部材１１ｂを有する。支持本体部１１ａは、フレーム１２の底部に固定されている。延長部材１１ｂは、支持本体部１１ａから原子炉圧力容器１００の内周面に向けて径方向にスライド移動する。延長部材１１ｂの先端が原子炉圧力容器１００の内周面に接触することによって、支持機構１１は固定される。このとき、支持機構１１は、延長部材１１ｂによって伸縮することができるため、原子炉圧力容器１００の内径に関わらず固定することができる。なお、本実施形態では、４つの支持機構１１が、原子炉圧力容器１００の周方向に９０°の間隔で配置されているが、支持機構１１の数および間隔は特に制限されない。 The support mechanism 11 has a support main body portion 11a and an extension member 11b. The support main body 11a is fixed to the bottom of the frame 12. The extension member 11b slides in the radial direction from the support main body 11a toward the inner peripheral surface of the reactor pressure vessel 100. The support mechanism 11 is fixed by the tip of the extension member 11b coming into contact with the inner peripheral surface of the reactor pressure vessel 100. At this time, since the support mechanism 11 can be expanded and contracted by the extension member 11b, it can be fixed regardless of the inner diameter of the reactor pressure vessel 100. In the present embodiment, the four support mechanisms 11 are arranged at intervals of 90 ° in the circumferential direction of the reactor pressure vessel 100, but the number and intervals of the support mechanisms 11 are not particularly limited.

支持機構１１によってフレーム１２等の切断装置１の各要素が、原子炉圧力容器１００内で支持される。フレーム１２の上部には、回転台１３が設置されている。回転台１３は、例えば円環レールで構成され、回転駆動機１９によって、周方向に回転する。回転台１３上には、送り機構１４が設置されている。送り機構１４は、例えば、互いに並行する一対の直線レールで構成されている。送り機構１４上には、固定台１５が設置されている。固定台１５は、送り駆動機１８によって、送り機構１４に沿って径方向に移動することができる。送り駆動機１８および回転駆動機１９の各々は、例えばモータ、およびそのモータの駆動回路等で構成されている。 Each element of the cutting device 1 such as the frame 12 is supported in the reactor pressure vessel 100 by the support mechanism 11. A turntable 13 is installed on the upper part of the frame 12. The turntable 13 is composed of, for example, an annular rail, and is rotated in the circumferential direction by the rotary drive machine 19. A feed mechanism 14 is installed on the turntable 13. The feed mechanism 14 is composed of, for example, a pair of straight rails parallel to each other. A fixing base 15 is installed on the feed mechanism 14. The fixed base 15 can be moved in the radial direction along the feed mechanism 14 by the feed drive device 18. Each of the feed drive 18 and the rotary drive 19 is composed of, for example, a motor and a drive circuit of the motor.

固定台１５上には、切断刃１７を交換するための交換ユニット１６が設置されている。交換ユニット１６は、ガイドプレート２０、ガイドピン２１、およびケース２３によって、固定台１５上に固定される。 A replacement unit 16 for replacing the cutting blade 17 is installed on the fixed base 15. The replacement unit 16 is fixed on the fixing base 15 by the guide plate 20, the guide pin 21, and the case 23.

図２に示すように、ガイドプレート２０は、交換ユニット１６を挟み込む位置に設置される。ガイドプレート２０によって、固定台１５上における交換ユニット１６の固定位置が規定される。 As shown in FIG. 2, the guide plate 20 is installed at a position where the replacement unit 16 is sandwiched. The guide plate 20 defines the fixed position of the replacement unit 16 on the fixing base 15.

ガイドピン２１は、図１および図３に示すように、固定台１５上から鉛直方向（回転台１３の回転軸方向）に突出している。ガイドピン２１は、下端部から先端部にかけて先細になるテーパ形状を有する。ガイドピン２１が交換ユニット１６に設けられた穴部を貫通すると、交換ユニット１６は、ガイドプレート２０で導かれ、ガイドピン２１で規定された設定位置に定着する。 As shown in FIGS. 1 and 3, the guide pin 21 projects in the vertical direction (in the direction of the rotation axis of the turntable 13) from above the fixing base 15. The guide pin 21 has a tapered shape that tapers from the lower end to the tip. When the guide pin 21 penetrates the hole provided in the replacement unit 16, the replacement unit 16 is guided by the guide plate 20 and fixed at the set position defined by the guide pin 21.

ケース２３も、ガイドプレート２０と同様に交換ユニット１６挟み込む位置に設置される。ケース２３内には、固定ピン２２が収容されている。固定ピン２２は、例えば、遠隔操作でケース２３内から水平方向に突出または引っ込むことができるシリンダーピンである。固定ピン２２が、交換ユニット１６のケース２３に対向する部分に設けられた穴部に挿入されると、交換ユニット１６が固定台１５に固定される。 The case 23 is also installed at a position where the replacement unit 16 is sandwiched, like the guide plate 20. A fixing pin 22 is housed in the case 23. The fixing pin 22 is, for example, a cylinder pin that can be remotely controlled to project or retract horizontally from the inside of the case 23. When the fixing pin 22 is inserted into the hole provided in the portion of the replacement unit 16 facing the case 23, the replacement unit 16 is fixed to the fixing base 15.

次に、上述した切断装置１を用いて原子炉圧力容器１００を切断する方法を説明する。 Next, a method of cutting the reactor pressure vessel 100 using the cutting device 1 described above will be described.

図４は、切断装置１による原子炉圧力容器１００の切断方法を模式的に示す図である。図４に示すように、切断装置１は、プール２００内で原子炉圧力容器１００を切断する。このとき、切断装置１は、クレーン３０に吊り下げられている。また、原子炉圧力容器１００の切断は、遠隔操作盤５０および制御装置４０を用いて遠隔操作される。作業者が遠隔操作盤５０を操作すると、制御装置４０が、操作内容に基づいて切断装置１の動作を制御する。 FIG. 4 is a diagram schematically showing a method of cutting the reactor pressure vessel 100 by the cutting device 1. As shown in FIG. 4, the cutting device 1 cuts the reactor pressure vessel 100 in the pool 200. At this time, the cutting device 1 is suspended from the crane 30. Further, the cutting of the reactor pressure vessel 100 is remotely controlled by using the remote control panel 50 and the control device 40. When the operator operates the remote control panel 50, the control device 40 controls the operation of the cutting device 1 based on the operation content.

制御装置４０は、図４に示すように、支持制御部４１と、駆動制御部４２と、交換制御部４３と、を備える。各制御部は、例えば、種々の電子部品が搭載された制御盤で構成されている。 As shown in FIG. 4, the control device 40 includes a support control unit 41, a drive control unit 42, and an exchange control unit 43. Each control unit is composed of, for example, a control panel on which various electronic components are mounted.

支持制御部４１は、切断装置１の支持機構１１の動作を制御する。駆動制御部４２は、回転駆動機１９および送り駆動機１８の動作を制御する。交換制御部４３は、交換ユニット１６を用いた切断刃１７の交換作業を制御する。 The support control unit 41 controls the operation of the support mechanism 11 of the cutting device 1. The drive control unit 42 controls the operations of the rotary drive machine 19 and the feed drive machine 18. The replacement control unit 43 controls the replacement work of the cutting blade 17 using the replacement unit 16.

切断装置１を用いて原子炉圧力容器１００を切断する際、まず、支持機構１１の延長部材１１ｂが、支持制御部４１の制御に基づいて、支持本体部１１ａから原子炉圧力容器１００の内周面に接触する位置までスライド移動する。これにより、切断装置１が、原子炉圧力容器１００内で固定される。 When cutting the reactor pressure vessel 100 using the cutting device 1, first, the extension member 11b of the support mechanism 11 starts from the support main body 11a to the inner circumference of the reactor pressure vessel 100 under the control of the support control unit 41. Slide to a position where it touches the surface. As a result, the cutting device 1 is fixed in the reactor pressure vessel 100.

続いて、送り駆動機１８が、駆動制御部４２の制御に基づいて、固定台１５および交換ユニット１６を送り機構１４に沿って、原子炉圧力容器１００の内周面に向けて移動させる。これにより、交換ユニット１６に取り付けられた切断刃１７が、回転しながら径方向の外側へ押し出されるので、原子炉圧力容器１００の一部が切断される。 Subsequently, the feed drive 18 moves the fixing base 15 and the replacement unit 16 along the feed mechanism 14 toward the inner peripheral surface of the reactor pressure vessel 100 under the control of the drive control unit 42. As a result, the cutting blade 17 attached to the replacement unit 16 is pushed out in the radial direction while rotating, so that a part of the reactor pressure vessel 100 is cut.

図５（ａ）〜図５（ｄ）は、切断刃１７の軌跡を示す上面図である。切断刃１７が、図５（ａ）に示す位置で原子炉圧力容器１００の一部を切断すると、続いて、送り駆動機１８が、駆動制御部４２の制御に基づいて、固定台１５および交換ユニット１６を送り機構１４に沿って引き戻す。これにより、切断刃１７が、図５（ｂ）に示すように、原子炉圧力容器１００の切断箇所から径方向内側に引き抜かれる。 5 (a) to 5 (d) are top views showing the loci of the cutting blade 17. When the cutting blade 17 cuts a part of the reactor pressure vessel 100 at the position shown in FIG. 5 (a), the feed drive 18 is subsequently replaced with the fixing base 15 under the control of the drive control unit 42. The unit 16 is pulled back along the feed mechanism 14. As a result, as shown in FIG. 5B, the cutting blade 17 is pulled out radially inward from the cutting portion of the reactor pressure vessel 100.

続いて、回転駆動機１９が、駆動制御部４２の制御に基づいて、送り機構１４、固定台１５、および交換ユニット１６を回転させる。これにより、図５（ｃ）に示すように、切断刃１７は、周方向に変位する。 Subsequently, the rotary drive machine 19 rotates the feed mechanism 14, the fixed base 15, and the replacement unit 16 under the control of the drive control unit 42. As a result, as shown in FIG. 5C, the cutting blade 17 is displaced in the circumferential direction.

続いて、送り駆動機１８が、再び、固定台１５および交換ユニット１６を送り機構１４に沿って、原子炉圧力容器１００の内周面に向けて移動させる。これにより、図５（ｄ）に示すように、切断刃１７も、再び、回転しながら径方向の外側へ押し出されるので、原子炉圧力容器１００の他の一部が切断される。 Subsequently, the feed drive 18 again moves the fixing base 15 and the replacement unit 16 along the feed mechanism 14 toward the inner peripheral surface of the reactor pressure vessel 100. As a result, as shown in FIG. 5D, the cutting blade 17 is also pushed out in the radial direction while rotating again, so that the other part of the reactor pressure vessel 100 is cut.

その後は、駆動制御部４２は、原子炉圧力容器１００の全周を切断するまで、切断刃１７の押し出しおよび引き抜きを含む送り動作と、切断刃を周方向に変位させる回転動作とを、交互に繰り返させる。 After that, the drive control unit 42 alternately performs a feed operation including pushing and pulling out of the cutting blade 17 and a rotation operation of displaces the cutting blade in the circumferential direction until the entire circumference of the reactor pressure vessel 100 is cut. Let it repeat.

図５（ａ）〜図５（ｄ）に示すように、切断刃１７で原子炉圧力容器１００の全周を周方向に連続的に切断していくと、切断が進むにつれて原子炉圧力容器１００の自重による部材のたわみ、あるいは、溶接ひずみの開放等により発生する切断部隙間の減少による切断刃１７の挟み込みあるいは破損が懸念される。そこで、原子炉圧力容器１００の切断箇所に、遠隔操作で部分的にくさびを打ち込んでもよい。これにより、切断刃１７の挟み込みあるいは破損を防止することができる。 As shown in FIGS. 5 (a) to 5 (d), when the entire circumference of the reactor pressure vessel 100 is continuously cut in the circumferential direction with the cutting blade 17, the reactor pressure vessel 100 is cut as the cutting progresses. There is a concern that the cutting blade 17 may be pinched or damaged due to the deflection of the member due to its own weight or the reduction of the gap between the cutting portions caused by the release of welding strain. Therefore, a wedge may be partially driven into the cut portion of the reactor pressure vessel 100 by remote control. This makes it possible to prevent the cutting blade 17 from being pinched or damaged.

また、くさびを打ち込む代わりに、図６に示すように、切断刃１７の周方向の変位角度θ２を、連続的に切断する変位角度θ１（図５（ｃ）参照）よりも大きくすることによって、原子炉圧力容器１００の全周を周方向に断続的に切断してもよい。この場合、切断刃１７に加えられる原子炉圧力容器１００の自重を低減できるため、切断刃１７を保護することができる。さらに、くさびを打ち込む作業等を削減できるため、原子炉圧力容器１００の切断に要する時間を短縮することが可能となる。 Further, instead of driving the wedge, as shown in FIG. 6, the displacement angle θ2 in the circumferential direction of the cutting blade 17 is made larger than the displacement angle θ1 for continuously cutting (see FIG. 5C). The entire circumference of the reactor pressure vessel 100 may be cut intermittently in the circumferential direction. In this case, the weight of the reactor pressure vessel 100 added to the cutting blade 17 can be reduced, so that the cutting blade 17 can be protected. Further, since the work of driving the wedge can be reduced, the time required for cutting the reactor pressure vessel 100 can be shortened.

次に、図７〜図１０を参照して、切断刃１７の交換動作について説明する。 Next, the replacement operation of the cutting blade 17 will be described with reference to FIGS. 7 to 10.

まず、図７に示すように、制御装置４０の交換制御部４３が、遠隔操作盤５０の操作に従って、固定ピン２２を交換ユニット１６から引き抜かせてケース２３内に収容させる。これにより、交換ユニット１６の固定台１５への固定状態が開放される。 First, as shown in FIG. 7, the replacement control unit 43 of the control device 40 pulls out the fixing pin 22 from the replacement unit 16 and accommodates it in the case 23 according to the operation of the remote control panel 50. As a result, the fixed state of the replacement unit 16 to the fixing base 15 is released.

続いて、図８に示すように、クレーン３０が、遠隔操作盤５０の操作に従って、交換ユニット１６を吊り上げる。クレーン３０は、吊り上げた交換ユニット１６を、プール２００の周辺の交換作業エリア３００まで搬送する。交換作業エリア３００では、遠隔操作盤５０を用いた遠隔操作によって、切断刃１７の交換作業が行われる。なお、この交換作業では、原子炉圧力容器１００を周方向に切断する切断刃１７の代わりに、原子炉圧力容器１００を鉛直方向（軸方向）に切断する切断刃が取り付けられてもよい。 Subsequently, as shown in FIG. 8, the crane 30 lifts the replacement unit 16 according to the operation of the remote control panel 50. The crane 30 conveys the lifted exchange unit 16 to the exchange work area 300 around the pool 200. In the replacement work area 300, the cutting blade 17 is replaced by remote control using the remote control panel 50. In this replacement work, instead of the cutting blade 17 that cuts the reactor pressure vessel 100 in the circumferential direction, a cutting blade that cuts the reactor pressure vessel 100 in the vertical direction (axial direction) may be attached.

切断刃１７の交換作業が終了すると、図９に示すように、クレーン３０は、交換ユニット１６を吊り下げて、ガイドプレート２０で規定される固定位置まで降ろす。このとき、ガイドピン２１が、交換ユニット１６の穴部を貫通すると、交換ユニット１６が設定位置に定着する。 When the replacement work of the cutting blade 17 is completed, as shown in FIG. 9, the crane 30 suspends the replacement unit 16 and lowers it to the fixed position defined by the guide plate 20. At this time, when the guide pin 21 penetrates the hole of the replacement unit 16, the replacement unit 16 is fixed at the set position.

最後に、図１０に示すように、交換制御部４３が、ケース２３内から固定ピン２２を突出させて交換ユニット１６内に挿入、固定させる。これにより、交換ガイドが固定台１５に固定され、交換作業が完了する。 Finally, as shown in FIG. 10, the replacement control unit 43 projects the fixing pin 22 from the inside of the case 23 and inserts and fixes it in the replacement unit 16. As a result, the replacement guide is fixed to the fixing base 15, and the replacement work is completed.

以上説明した本実施形態によれば、ガスの代わりに切断刃１７を用いて原子炉圧力容器１００を切断するため、火災予防のための安全装置が不要になる。そのため、本実施形態に係る切断装置１は、熱切断方式の切断装置に比べて、安全性および経済性の点で優れたものとなる。 According to the present embodiment described above, since the reactor pressure vessel 100 is cut by using the cutting blade 17 instead of the gas, a safety device for fire prevention becomes unnecessary. Therefore, the cutting device 1 according to the present embodiment is superior in terms of safety and economy as compared with the heat cutting type cutting device.

また、本実施形態では、切断刃１７を周方向に連続的に回転させながら原子炉圧力容器１００を切断するのではなく、切断刃１７を切断箇所から一旦引き抜いて周方向に変位させている。そのため、上記のような切断刃１７の駆動は、送り駆動機１８および回転駆動機１９の駆動力を最小限に抑え、切断装置の小型化および低コスト化に寄与することができる。また、従来の切断方法に比べて切断刃１７への負荷が低減するので、切断刃１７の長寿命化および偶発的な破損を防ぐことが可能となる。 Further, in the present embodiment, instead of cutting the reactor pressure vessel 100 while continuously rotating the cutting blade 17 in the circumferential direction, the cutting blade 17 is once pulled out from the cutting portion and displaced in the circumferential direction. Therefore, the driving of the cutting blade 17 as described above can minimize the driving force of the feed drive 18 and the rotary drive 19, and contribute to the miniaturization and cost reduction of the cutting device. Further, since the load on the cutting blade 17 is reduced as compared with the conventional cutting method, it is possible to extend the life of the cutting blade 17 and prevent accidental damage.

なお、本実施形態のように切断刃１７を駆動する場合、切断刃１７の半径（中心から刃先までの距離）が小さすぎても大きすぎても、原子炉圧力容器１００の切断に支障をきたす。そのため、切断刃１７の半径は、原子炉圧力容器１００の切断箇所の最大厚さの２倍以上、かつ３倍以下であることが望ましい。 When the cutting blade 17 is driven as in the present embodiment, if the radius (distance from the center to the cutting edge) of the cutting blade 17 is too small or too large, the cutting of the reactor pressure vessel 100 will be hindered. .. Therefore, it is desirable that the radius of the cutting blade 17 is twice or more and three times or less the maximum thickness of the cutting portion of the reactor pressure vessel 100.

（第２実施形態）
図２は、第２実施形態に係る切断装置の正面図である。上述した第１実施形態に係る切断装置１と同様の構成要素には同じ符号を付し、詳細な説明を省略する。 (Second Embodiment)
FIG. 2 is a front view of the cutting device according to the second embodiment. The same components as those of the cutting device 1 according to the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted.

本実施形態に係る切断装置２は、上述した切断装置１の構成要素に加えて、切粉受け皿２４およびアーム２５を備える。切粉受け皿２４は、原子炉圧力容器１００の外部に設置され、原子炉圧力容器１００を挟んで切断刃１７と対向する。切粉受け皿２４の上部は、切断刃１７で原子炉圧力容器１００を切断する際に生成された切粉を回収するために開口している。 The cutting device 2 according to the present embodiment includes a chip tray 24 and an arm 25 in addition to the components of the cutting device 1 described above. The chip tray 24 is installed outside the reactor pressure vessel 100 and faces the cutting blade 17 with the reactor pressure vessel 100 interposed therebetween. The upper portion of the chip tray 24 is opened to collect chips generated when the reactor pressure vessel 100 is cut by the cutting blade 17.

アーム２５は、原子炉圧力容器１００の内部から上端開口部を通じて外部に渡って屈曲している。アーム２５の一端は、切粉受け皿２４に取り付けられ、他端は交換ユニット１６に取り付けられている。アーム２５によって、切粉受け皿２４は、交換ユニット１６に連結される。 The arm 25 is bent from the inside of the reactor pressure vessel 100 to the outside through the upper end opening. One end of the arm 25 is attached to the chip tray 24, and the other end is attached to the replacement unit 16. The chip tray 24 is connected to the exchange unit 16 by the arm 25.

上述した切断装置２を用いて原子炉圧力容器１００を切断する際、第１実施形態と同様に、切断刃１７は、送り駆動機１８によって、原子炉圧力容器１００へ押し出され、その後、切断箇所から引き抜かれる。続いて、切断刃１７は、回転駆動機１９によって、周方向に変位する。このとき、交換ユニット１６には、アーム２５が取り付けられている。そのため、回転駆動機１９の駆動力が、アーム２５を介して切粉受け皿２４にも伝達される。そのため、切粉受け皿２４は、切断刃１７と同じタイミングで同じ方向に回転する。すなわち、切粉受け皿２４は、切断刃１７と同期回転する。 When cutting the reactor pressure vessel 100 using the cutting device 2 described above, the cutting blade 17 is pushed out to the reactor pressure vessel 100 by the feed drive 18 as in the first embodiment, and then the cutting portion is cut. Is pulled out from. Subsequently, the cutting blade 17 is displaced in the circumferential direction by the rotary drive machine 19. At this time, the arm 25 is attached to the replacement unit 16. Therefore, the driving force of the rotary drive machine 19 is also transmitted to the chip tray 24 via the arm 25. Therefore, the chip tray 24 rotates in the same direction at the same timing as the cutting blade 17. That is, the chip tray 24 rotates synchronously with the cutting blade 17.

また、切断刃１７を交換する際には、第１実施形態と同様に、クレーン３０で交換ユニット１６を吊り上げる。本実施形態では、このとき、遠隔操作盤５０を用いた遠隔操作によって、交換ユニット１６とアーム２５の連結が解除される。 Further, when the cutting blade 17 is replaced, the replacement unit 16 is lifted by the crane 30 as in the first embodiment. In the present embodiment, at this time, the connection between the replacement unit 16 and the arm 25 is released by remote control using the remote control panel 50.

以上説明した本実施形態によれば、第１実施形態と同様に、切断刃１７を用いて原子炉圧力容器１００を切断する。そのため、火災予防のための安全装置が不要になり、熱切断方式の切断装置に比べて、安全性および経済性が向上する。 According to the present embodiment described above, the reactor pressure vessel 100 is cut using the cutting blade 17 as in the first embodiment. Therefore, a safety device for fire prevention becomes unnecessary, and safety and economy are improved as compared with a heat cutting type cutting device.

また、本実施形態では、切断により生成した切粉は、切粉受け皿２４に回収される。そのため、放射性物質を含んだ切粉がプール２００へ落下するのを防ぐことが可能となる。 Further, in the present embodiment, the chips generated by cutting are collected in the chip tray 24. Therefore, it is possible to prevent chips containing radioactive substances from falling into the pool 200.

以上、いくつかの実施形態および変形例を説明したが、これらの実施形態は、例としてのみ提示したものであり、発明の範囲を限定することを意図したものではない。本明細書で説明した新規なシステムは、その他の様々な形態で実施することができる。また、本明細書で説明したシステムの形態に対し、発明の要旨を逸脱しない範囲内で、種々の省略、置換、変更を行うことができる。添付の特許請求の範囲およびこれに均等な範囲は、発明の範囲や要ことに含まれるこのような形態や変形例を含むように意図されている。罫線 Although some embodiments and modifications have been described above, these embodiments are presented only as examples and are not intended to limit the scope of the invention. The novel system described herein can be implemented in a variety of other forms. In addition, various omissions, substitutions, and changes can be made to the form of the system described in the present specification without departing from the gist of the invention. The appended claims and their equivalent scope are intended to include such forms and variations that are included in the scope and gist of the invention. Ruled line

１，２：切断装置、１１：支持機構、１１ａ：支持本体部、１１ｂ：延長部材、１２：フレーム、１３：回転台、１４：送り機構、１５：固定台、１６：交換ユニット、１７：切断刃、１８：送り駆動機、１９：回転駆動機、２０：ガイドプレート、２１：ガイドピン、２２：固定ピン、２３：ケース、２４：切粉受け皿、２５：アーム、３０：クレーン、４０：制御装置、４１：支持制御部、４２：駆動制御部、４３：交換制御部、５０：遠隔操作盤、１００：原子炉圧力容器、２００：プール、３００：交換作業エリア 1,2: Cutting device, 11: Support mechanism, 11a: Support body, 11b: Extension member, 12: Frame, 13: Rotating table, 14: Feed mechanism, 15: Fixed table, 16: Replacement unit, 17: Cutting Blade, 18: Feed drive, 19: Rotary drive, 20: Guide plate, 21: Guide pin, 22: Fixed pin, 23: Case, 24: Chip tray, 25: Arm, 30: Crane, 40: Control Equipment, 41: Support control unit, 42: Drive control unit, 43: Replacement control unit, 50: Remote control panel, 100: Reactor pressure vessel, 200: Pool, 300: Replacement work area

（第２実施形態）
図１１は、第２実施形態に係る切断装置の正面図である。上述した第１実施形態に係る切断装置１と同様の構成要素には同じ符号を付し、詳細な説明を省略する。 (Second Embodiment)
FIG. 11 is a front view of the cutting device according to the second embodiment. The same components as those of the cutting device 1 according to the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted.

Claims (9)

切断対象物内に固定される支持機構と、
前記支持機構に支持される回転台と、
前記回転台とともに回転する送り機構と、
前記送り機構に沿って移動可能な固定台と、
前記固定台上に配置された切断刃と、
前記固定台が、前記切断刃を切断対象物の切断箇所へ押し出し、その後、前記切断刃を前記切断箇所から引き抜く送り動作を行わせる送り駆動機と、
前記回転台が、前記固定台を回転させることによって前記切断箇所から引き抜かれた前記切断刃を周方向に変位させる回転動作を行わせる回転駆動機と、
を備える切断装置。 A support mechanism fixed in the object to be cut,
A turntable supported by the support mechanism and
A feed mechanism that rotates with the turntable and
A fixed base that can move along the feed mechanism,
With the cutting blade placed on the fixed base,
The fixing base pushes the cutting blade to the cutting portion of the object to be cut, and then pulls out the cutting blade from the cutting portion to perform a feed operation.
A rotary drive machine that causes the turntable to perform a rotary operation in which the cutting blade pulled out from the cutting portion is displaced in the circumferential direction by rotating the fixed base.
A cutting device comprising. 前記切断刃を交換するための交換ユニットと、
前記固定台における前記交換ユニットの固定位置を決めるためのガイドプレートと、
前記固定位置で前記交換ユニットを前記固定台に固定するための固定ピンと、をさらに備える、請求項１に記載の切断装置。 A replacement unit for replacing the cutting blade and
A guide plate for determining the fixing position of the exchange unit on the fixing base, and
The cutting device according to claim 1, further comprising a fixing pin for fixing the exchange unit to the fixing base at the fixing position. 前記切断対象物を挟んで前記切断刃と対向する切粉受け皿と、
前記切粉受け皿を前記交換ユニットに連結するアームと、をさらに備え、
回転駆動機が、前記切粉受け皿を前記切断刃と同期回転させる、請求項２に記載の切断装置。 A chip tray facing the cutting blade with the object to be cut sandwiched between them.
An arm for connecting the chip tray to the exchange unit is further provided.
The cutting device according to claim 2, wherein the rotary drive rotates the chip tray in synchronization with the cutting blade. 前記支持機構は、支持本体部と、前記支持本体部から前記切断対象物に向けてスライド移動する延長部材と、を有する、請求項１から３のいずれか１項に記載の切断装置。 The cutting device according to any one of claims 1 to 3, wherein the support mechanism includes a support main body portion and an extension member that slides from the support main body portion toward the cutting object. 前記送り駆動機および前記回転駆動機は、遠隔操作可能である、請求項１から４のいずれか１項に記載の切断装置。 The cutting device according to any one of claims 1 to 4, wherein the feed drive and the rotary drive can be remotely controlled. 前記切断刃の半径が、前記切断対象物の切断箇所の最大厚さの２倍以上かつ３倍以下である、請求項１から５のいずれか１項に記載の切断装置。 The cutting device according to any one of claims 1 to 5, wherein the radius of the cutting blade is twice or more and three times or less the maximum thickness of the cutting portion of the object to be cut. 請求項１から６のいずれか１項に記載の切断装置を制御する制御装置であって、
前記支持機構の動作を制御する支持制御部と、
前記送り動作および前記回転動作を交互に繰り返させる駆動制御部と、を備える制御装置。 A control device that controls the cutting device according to any one of claims 1 to 6.
A support control unit that controls the operation of the support mechanism,
A control device including a drive control unit that alternately repeats the feed operation and the rotation operation. 切断対象物内で、切断刃を切断箇所へ押し出し、
前記切断刃を前記切断箇所から引き抜き、
前記切断箇所から引き抜かれた前記切断刃を周方向に変位させ、
変位させた前記切断刃を他の切断箇所へ押し出す、切断方法。 In the object to be cut, push the cutting blade to the cutting point,
Pull out the cutting blade from the cutting point,
The cutting blade pulled out from the cutting portion is displaced in the circumferential direction.
A cutting method in which the displaced cutting blade is pushed out to another cutting location. 前記切断対象物が前記周方向に断続的に切断されるように、前記切断刃を前記周方向に変位させる、請求項８に記載の切断方法。 The cutting method according to claim 8, wherein the cutting blade is displaced in the circumferential direction so that the object to be cut is intermittently cut in the circumferential direction.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114273716A (en) * 2021-12-03 2022-04-05 苏州热工研究院有限公司 Cutting device for reactor pressure vessel
CN114535693A (en) * 2022-04-27 2022-05-27 江苏浦上精密制造科技有限公司 Numerical control blade gap adjusting mechanism for plate shearing machine
KR20230000497A (en) * 2021-06-24 2023-01-03 전북대학교산학협력단 Cutting device for decommissioning nuclear facilities and nuclear facilities decommissioning method using thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03290566A (en) * 1990-04-09 1991-12-20 Taisei Corp Dismantler
JPH06339896A (en) * 1993-05-31 1994-12-13 Alps Tool:Kk Material cutting method
JPH1177429A (en) * 1997-09-03 1999-03-23 Bitsugu Alpha Kk Long wokpiece cutter
JP2004061394A (en) * 2002-07-31 2004-02-26 Research & Development Bureau Ministry Of Education Culture Sports Sicence & Technology Cutting method for reactor pressure vessel, and pitch holding fixture used in cutting method
JP2004061396A (en) * 2002-07-31 2004-02-26 Research & Development Bureau Ministry Of Education Culture Sports Sicence & Technology Cutting apparatus for dismantling reactor pressure vessel
JP2007139618A (en) * 2005-11-18 2007-06-07 Toshiba Corp Device of cutting shroud of nuclear reactor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03290566A (en) * 1990-04-09 1991-12-20 Taisei Corp Dismantler
JPH06339896A (en) * 1993-05-31 1994-12-13 Alps Tool:Kk Material cutting method
JPH1177429A (en) * 1997-09-03 1999-03-23 Bitsugu Alpha Kk Long wokpiece cutter
JP2004061394A (en) * 2002-07-31 2004-02-26 Research & Development Bureau Ministry Of Education Culture Sports Sicence & Technology Cutting method for reactor pressure vessel, and pitch holding fixture used in cutting method
JP2004061396A (en) * 2002-07-31 2004-02-26 Research & Development Bureau Ministry Of Education Culture Sports Sicence & Technology Cutting apparatus for dismantling reactor pressure vessel
JP2007139618A (en) * 2005-11-18 2007-06-07 Toshiba Corp Device of cutting shroud of nuclear reactor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230000497A (en) * 2021-06-24 2023-01-03 전북대학교산학협력단 Cutting device for decommissioning nuclear facilities and nuclear facilities decommissioning method using thereof
KR102631280B1 (en) * 2021-06-24 2024-02-01 전북대학교산학협력단 Cutting device for decommissioning nuclear facilities and nuclear facilities decommissioning method using thereof
CN114273716A (en) * 2021-12-03 2022-04-05 苏州热工研究院有限公司 Cutting device for reactor pressure vessel
CN114535693A (en) * 2022-04-27 2022-05-27 江苏浦上精密制造科技有限公司 Numerical control blade gap adjusting mechanism for plate shearing machine

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