Moisture separator cutting device and cutting method

Abstract

The water separator cutting device comprises a fixing module, a cutting module and a flexible shaft. The moisture separator cutting device may be moved into the interior of the outer cylinder of the moisture separator in a state in which the flexible shaft is folded. When the flexible shaft is straightened, an upper clamp of the fixing module is fixed to the upper end of the outer cylinder, and a wheel cutter of the cutting module can cut the outer cylinder or the inner cylinder while rotating. According to the present invention, the moisture separator cutting device can be folded and moved into the cylinder, so that the cylinder can be quickly and accurately cut even in a narrow internal space of the steam generator, and the replacement operation of the moisture separator can be effectively performed even in a narrow space.

Description

Technical Field

[0001] The invention relates to a moisture separator cutting device and a cutting method. Background Art

[0002] Nuclear power generation is a method of generating electricity using the energy generated during a nuclear fission chain reaction. The types of nuclear reactors used in nuclear power generation include pressurized light water reactors, pressurized heavy water reactors, boiling light water reactors, and gas-cooled reactors. Among them, pressurized light water reactors and pressurized heavy water reactors transfer the heat generated in the nuclear reactor to the steam generator through a cooling material, and generate steam in the steam generator through heat exchange with the steam generator to drive the turbine to rotate.

[0003] The steam generator performs heat exchange between the cooling material circulating and heated in the core of the atomic reactor and the secondary side water supply, and is equipped with electric heating pipes, moisture separators, steam dryers, and steam outlets. The moisture separator is located at the upper part of the steam generator and serves to increase the dryness of the steam by removing moisture from the generated steam.

[0004] Because the moisture separator is continuously exposed to high temperature steam and moisture, erosion or corrosion may occur, which may lead to problems such as thickness reduction or component damage and contamination caused by the fallen corrosion products.

[0005] In order to prevent the above problems, the steam generator can be replaced, but in the above case, other parts that do not need to be replaced need to be replaced at the same time, which will lead to the problem of increased replacement cost. In the case of only maintaining the moisture separator, it is difficult to cut the moisture separator by a general cutting device because there are multiple moisture separators adjacently arranged on the steam generator and the interior is narrow. Therefore, it is necessary to develop a device that can accurately and quickly cut multiple moisture separators.

[0006] Prior art literature

[0007] Patent Literature

[0008] Registered patent No. 10-1721937 (Title: Cutting device for tube bundle of steam generator) Summary of the invention

[0009] An object of the present invention is to provide a moisture separator cutting device which can accurately and quickly cut a moisture separator even in a narrow internal space of a steam generator.

[0010] An object of the present invention is to provide a moisture separator cutting device which can minimize the scattering of foreign matter inside a steam generator by adopting a rolling method.

[0011] The moisture separator cutting device according to one embodiment of the present invention comprises a fixing module, a cutting module and a flexible shaft. The fixing module may be equipped with an upper clamp and a motor disposed on the upper clamp. The cutting module may be equipped with a lower clamp and a wheel cutter mounted on the lower side of the lower clamp. The flexible shaft connects the fixing module and the cutting module so that the rotational force of the motor can be transmitted to the wheel cutter.

[0012] In the moisture separator cutting device according to one embodiment of the present invention, the flexible shaft may be equipped with at least two connecting rods.

[0013] In the moisture separator cutting device according to one embodiment of the present invention, the connecting rod may be equipped with a first connecting rod component and a second connecting rod component. An extension portion and a recessed portion may be formed in the first connecting rod component and the second connecting rod component, respectively.

[0014] The moisture separator cutting device according to one embodiment of the present invention may further include: at least one horizontal adjustment rod penetrating the fixing module and arranged in the axial direction of the cylinder.

[0015] In the moisture separator cutting device according to one embodiment of the present invention, a threaded portion may be formed on an upper portion of the horizontal adjustment rod.

[0016] In the moisture separator cutting device according to one embodiment of the present invention, the horizontal adjustment rod can be fixed on the upper clamp by means of a horizontal adjustment rod fixing block.

[0017] In the moisture separator cutting device according to one embodiment of the present invention, the upper clamp may be equipped with a first upper clamp and a second upper clamp. The first upper clamp and the second upper clamp are semicircular in shape, and protrusions may be formed at both ends.

[0018] In the moisture separator cutting device according to one embodiment of the present invention, grooves may be formed at lower portions of the first upper clamp and the second upper clamp.

[0019] In the moisture separator cutting device according to one embodiment of the present invention, a silicone pad may be provided inside the grooves of the first upper clamp and the second upper clamp.

[0020] In the moisture separator cutting device according to one embodiment of the present invention, the motor can be assembled and disassembled on the upper clamp.

[0021] In the moisture separator cutting device according to one embodiment of the present invention, a level gauge may be installed on the lower clamp.

[0022] In the moisture separator cutting device according to one embodiment of the present invention, the wheel cutter can be elastically pressurized in the radial direction by means of hydraulic pressure.

[0023] According to one embodiment of the present invention, the moisture separator cutting method may include: a step of moving the moisture separator cutting device to the interior of the outer cylinder with the flexible axis folded; a step of embedding the first upper clamp into the upper end of the outer cylinder after the cutting module is introduced into the interior of the outer cylinder; a step of fastening the first upper clamp and the second upper clamp after the second upper clamp is embedded into the upper end of the outer cylinder; a step of adjusting the level of the cutting module by means of at least one horizontal adjustment rod; and a step of cutting the outer cylinder using the cutting module.

[0024] The moisture separator cutting method according to one embodiment of the present invention may further include: after executing the step of cutting the outer cylinder by using the cutting module, a step of sucking in dust.

[0025] According to the moisture separator cutting method of one embodiment of the present invention, the oxygen concentration can be measured and a warning sound can be issued when the oxygen concentration value is below a specific value.

[0026] According to the moisture separator cutting method of one embodiment of the present invention, the radiation concentration can be measured and a warning sound can be issued when the radiation concentration is above a specific value.

[0027] In the embodiment of the present invention, by cutting the moisture separator inside the moisture separator, interference between adjacent moisture separators can be prevented.

[0028] In the embodiment of the present invention, by folding the moisture separator cutting device, the cutting device can be easily moved into the moisture separator even when the gap is narrow.

[0029] In the embodiment of the present invention, by using the moisture separator cutting device to cut the inside of the cylinder by a press-in method, it is possible to minimize the scattering of foreign matter inside the steam generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram illustrating the structure of the steam generator of the present invention.

[0031] Figure 2 It is a schematic diagram illustrating the configuration state of the moisture separator of the present invention.

[0032] Figure 3It is a schematic diagram illustrating the configuration state of the moisture separator of the present invention.

[0033] Figure 4 It is a schematic diagram illustrating a moisture separator cutting device according to an embodiment of the present invention.

[0034] Figure 5 It is a schematic diagram illustrating a moisture separator cutting device according to an embodiment of the present invention.

[0035] Figure 6 It is a schematic diagram illustrating the folded state of the moisture separator cutting device according to an embodiment of the present invention.

[0036] Figure 7 It is a schematic diagram illustrating a state in which the device in the moisture separator cutting device according to an embodiment of the present invention is linearized after being moved to the cylinder.

[0037] Figure 8 It is a schematic diagram illustrating a connecting rod of a driving shaft in a moisture separator cutting device according to an embodiment of the present invention.

[0038] Fig. 9 It is a schematic diagram illustrating the installation state of the horizontal adjustment rod in the moisture separator cutting device according to an embodiment of the present invention.

[0039] Fig.10 It is a schematic diagram illustrating a state in which a horizontal adjustment rod in a moisture separator cutting device according to an embodiment of the present invention adjusts the level of the device.

[0040] Fig.11 It is a schematic diagram illustrating the state of different cutting modules installed in the moisture separator cutting device according to an embodiment of the present invention.

[0041] Fig.12 It is a schematic diagram illustrating the sequence of cutting a moisture separator using the moisture separator cutting device according to an embodiment of the present invention.

[0042] Fig.13 It is a schematic diagram illustrating the sequence of cutting a moisture separator using the moisture separator cutting device according to an embodiment of the present invention.

[0043] Fig.14 It is a schematic diagram illustrating a state where a moisture separator cutting device according to an embodiment of the present invention is installed in an outer cylinder and an inner cylinder.

[0044] Fig.15 It is a schematic diagram illustrating the state of cutting the outer cylinder and the inner cylinder using the moisture separator cutting device according to an embodiment of the present invention.

[0045]

Explanation of symbols

[0046] 100: Steam generator

[0047] 120A: Moisture separator unit

[0048] 120: Moisture separator

[0049] 121: Outer cylinder

[0050] 123: Inner cylinder

[0051] 130: Steam dryer

[0052] 1000: Moisture separator cutting device

[0053] 1100: Fixed module

[0054] 1110: Upper clamp

[0055] 1111: First upper clamp

[0056] 1112: Second upper clamp

[0057] 1115: Bump

[0058] 1120: Motor

[0059] 1200: Cutting module

[0060] 1210: Lower clamp

[0061] 1211: Level

[0062] 1220: Wheel cutter

[0063] 1300: Flexible shaft

[0064] 1310: Spindle

[0065] 1320: First connecting rod

[0066] 1330: Second connecting rod

[0067] 1331: First connecting rod component

[0068] 1332: Second connecting rod component

[0069] 1410, 1420, 1430: Horizontal adjustment lever

[0070] 1411: Threaded part

[0071] 1422: Bolt

[0072] 1433: Horizontal adjustment rod fixing block DETAILED DESCRIPTION

[0073] The present invention can be modified in various ways and has multiple embodiments, and specific embodiments will be exemplified and described in detail below. However, this is not intended to limit the present invention to specific embodiments, but should be understood to include all modifications, equivalents, and even substitutes included in the thought and technical scope of the present invention.

[0074] The terms used in the present invention are only used to illustrate specific embodiments and are not intended to limit the present invention. Unless the context clearly indicates otherwise, singular statements also include plural meanings. In the present invention, terms such as "including" or "having" are only used to indicate that the features, numbers, steps, actions, constituent elements, parts or the combination described in the specification exist, and should not be understood as excluding in advance the possibility that one or more other features, numbers, steps, actions, constituent elements, parts or the combination described exist or are added.

[0075] Next, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. At this point, it should be noted that the same components in the drawings are represented by the same symbols as much as possible. In addition, detailed descriptions related to known functions and structures that may make the gist of the present invention unclear will be omitted. For the same reason, some of the components in the drawings may be exaggerated, omitted or schematically illustrated.

[0076] Figure 1 is a schematic diagram illustrating the structure of the steam generator of the present invention, and Figure 2 as well as Figure 3 It is a schematic diagram illustrating the configuration state of the moisture separator of the present invention.

[0077] like Figure 1 As shown, the steam generator 100 includes an electric heating pipe 110, a moisture separator unit 120A, a steam dryer unit 130A, a steam outlet 140, and an access passage 150. The electric heating pipe 110 is located at the lower portion of the steam generator 100.

[0078] The heat generated in the atomic pile is transferred to the steam generator through the cooling material in the atomic pile, and the cooling material heated in the atomic pile exchanges heat with the water contained in the electric heating tube 110, thereby converting the water in the electric heating tube 110 into steam.

[0079] A plurality of moisture separators 120 are disposed in the moisture separator unit 120A. The steam generated inside the electric heating pipe 110 may separate moisture from the steam in the process of passing through each moisture separator 120 .

[0080] like Figure 2As shown, the moisture separator 120 is provided with an outer cylinder 121 and an inner cylinder 123. The outer cylinder 121 is formed in a cylindrical shape. The outer cylinder 121 can act as a channel for moving the moisture separated in the moisture separator 120 to the lower side. The moisture will move to the lower side of the steam generator 100 along the inner wall of the outer cylinder 121.

[0081] The inner cylinder 123 is located inside the outer cylinder 121 and spaced from the outer cylinder 121. The inner cylinder 123 and the outer cylinder 121 form a concentric axis. The inner cylinder 123 is formed in a cylindrical shape with a smaller diameter than the outer cylinder 121, and the steam generated in the electric heating pipe 110 moves upward inside the inner cylinder 123.

[0082] In the steam rising through the inner side of the inner cylinder 123, the heavier water will move to the outer cylinder 121 located outside. The separated water will move downward through the inner wall of the outer cylinder 121, and the steam after removing a part of the water will move upward.

[0083] The steam after passing through the moisture separator unit 120A will flow into the steam dryer unit 130A. The steam dryer unit 130A is equipped with a plurality of steam dryers 130. The steam dryer 130 further removes excess moisture from the steam after a portion of the moisture is removed in the moisture separator 120, thereby further improving the dryness of the steam. The dry steam after the moisture is removed will be discharged to the turbine side through the steam outlet 140.

[0084] In addition, the access passage 150 allows the workers to move to the inside of the steam generator 100. At the upper part of the steam generator 100, a walkway 160 is provided for the workers to enter and exit the inside of the steam generator 100.

[0085] When the moisture separator 120 is degraded and cannot smoothly separate moisture, the steam discharged to the steam outlet 140 will contain a large amount of moisture. In such a case, the turbine that rotates at high speed with the help of steam may be damaged by the moisture particles, which may further reduce the power generation performance. In order to prevent the above problems, it is necessary to replace the degraded moisture separator after cutting it.

[0086] However, the gap between the outer cylinder 121 of the moisture separator 120 and the steam dryer 130 is small, only about 15 cm, so it is difficult to move the moisture separator cutting device 1000. Figure 3 As shown, since a plurality of moisture separators 120 are arranged at narrow intervals, when cutting one moisture separator 120 , the cutting operation is not easy due to interference with adjacent moisture separators 120 .

[0087] The present invention relates to a cutting device 1000, which can perform cutting operations inside the outer cylinder 121 and the inner cylinder 123 of the moisture separator 120 in order to prevent interference with adjacent moisture separators 120 when cutting a moisture separator 120, and by adopting a folding method, the cutting device 1000 can be easily introduced into the interior of the outer cylinder 121 even in a narrow gap.

[0088] Figure 4 is a schematic diagram illustrating a moisture separator cutting device according to an embodiment of the present invention, Figure 5 is a schematic diagram illustrating a moisture separator cutting device according to an embodiment of the present invention, Figure 6 is a schematic diagram illustrating a folded state of a moisture separator cutting device according to an embodiment of the present invention, Figure 7 is a schematic diagram illustrating a state in which the device in the moisture separator cutting device according to an embodiment of the present invention is linearized after being moved to the cylinder, and Figure 8 It is a schematic diagram illustrating a connecting rod of a driving shaft in a moisture separator cutting device according to an embodiment of the present invention.

[0089] like Figure 4 As shown, the moisture separator cutting device 1000 according to an embodiment of the present invention includes a fixing module 1100 , a cutting module 1200 and a flexible shaft 1300 .

[0090] An upper clamp 1110 and a motor 1120 are provided in the fixing module 1100. The upper clamp 1110 is fixed to the upper end of the outer cylinder. In order to easily move and fix the cutting device 1000 to one side of the outer cylinder 121, a pair of upper clamps 1110 may be formed.

[0091] like Figure 5 As shown, the upper clamp 1110 may be equipped with a first upper clamp 1111 and a second upper clamp 1112. The first upper clamp 1111 and the second upper clamp 1112 are respectively formed in a semicircular shape, and protrusions 1115 for clamping components to be fastened are formed at both ends. Bolts 1117 may be pre-combined with the protrusions 1115 of the second upper clamp 1112. This is to increase the operating speed when the first upper clamp 1111 and the second upper clamp 1112 are fastened. At this time, in order to prevent the bolt from falling off from the second upper clamp 1112 due to vibration, the movement of the bolt partially combined with the opening of the protrusion may be restricted.

[0092] Specifically, a bolt 1117 is preliminarily connected to the protrusion 1115 of the second upper clamp 1112. The bolt 1117 is provided with a short radius portion 1117a and a long radius portion 1117b. The short radius portion 1117a having a smaller radius is provided on the head side of the bolt 1117, and the long radius portion 1117b having a larger radius is provided from the end of the short radius portion 1117a. A thread is formed on the outer peripheral surface of the short radius portion 1117a.

[0093] The projection 1115 is provided with an opening 1118 into which the bolt 1117 can be inserted, and the opening 1118 is also provided with a short radius portion 1118a and a long radius portion 1118b. That is, the radius of the outlet side of the opening 1118 is larger than that of the inlet side of the opening 1118, so that a step is formed inside the opening 1118. The radius of the long radius portion 1117b of the bolt 1117 is larger than the radius of the short radius portion 1118a of the opening 1118.

[0094] The short radius portion 1117a of the bolt 1117 can move along the opening 1118 inside the opening 1118. However, because the radius of the long radius portion 1117b of the bolt 1117 is larger than the radius of the short radius portion 1118a of the opening 1118, its movement is limited by the step difference inside the opening 1118. That is, the bolt 1117 can only move a length equivalent to H inside the opening 1118. Therefore, the bolt 1117 does not fall off from the opening 1118, and can be quickly coupled to the opening formed on the protrusion of the first upper clamp 1111. The radius of the opening formed on the protrusion of the first upper clamp 1111 can be equivalent to the long radius portion 1117b of the bolt 1117, and a thread is formed on the inner circumferential surface. Two openings 1118 can be formed.

[0095] Bolts 1117 are connected to the respective protrusions 1115 at both ends of the second upper clamp 1112, and the bolts are to be fastened to one side of the second upper clamp 1112, respectively.

[0096] The radius of the first upper clamp 1111 and the second upper clamp 1112 may be slightly larger than the radius of the outer cylinder 121. A groove for introducing the upper end of the outer cylinder 121 is formed at the lower part of the first upper clamp 1111 and the second upper clamp 1112. When the first upper clamp 1111 and the second upper clamp 1112 are fastened, a circular groove will be formed. The circumference of the circular groove is the same as the circumference of the outer cylinder 121, and the grooves of the first upper clamp 1111 and the second upper clamp 112 will be embedded and installed in the upper end of the outer cylinder 121. A component for preventing sliding may also be provided inside the grooves of the first upper clamp 1111 and the second upper clamp 1112. For example, a silicone protrusion or a silicone pad may be pasted inside the groove. An opening for the flexible shaft 1300 to pass through may be formed at the center of the upper clamp 1110.

[0097] The first upper clamp 1111 and the second upper clamp 1112 can be sequentially embedded in the outer cylinder 121 in a separated state, and then fastened to each other by means of a fastening assembly. The first upper clamp 1111 and the second upper clamp 1112 can be fastened by means of bolts through an opening formed on the protrusion 1115, or can be fastened by means of a separate clamping assembly. Due to the need to complete the operation quickly, for example, the first upper clamp 1111 and the second upper clamp 1112 can be fastened by means of a clamping assembly that engages on the outside of a pair of protrusions 1115 connected to each other. The first upper clamp 1111 and the second upper clamp 1112 can be fixed to the upper end of the outer cylinder 121 by fastening, thereby preventing the cutting device from shaking during the cutting operation.

[0098] The motor 1120 is mounted on the first upper fixture 1111. The motor 1120 imparts rotational force to the cutting module 1200. The shaft of the motor 1120 is connected to the flexible shaft 1300. The motor 1120 can be supplied with power by means of a separately connected cable. The motor 1120 can be fixed to the first upper fixture 1111, and can also be disassembled to improve the convenience of use in a narrow space.

[0099] The cutting module 1200 is provided with a lower fixture 1210 and a wheel cutter 1220. Fan-shaped support portions are provided on both sides of the lower fixture 1210. A pair of support portions can be attached to the inner wall of the outer cylinder 121, so that the cutting module 1200 is stably fixed to the inner wall of the outer cylinder. The diameter of the lower fixture 1210 is the same as the inner diameter of the outer cylinder 121. In another embodiment, a hydraulic cylinder can be built into the lower fixture 1210, so that one side of the support portion is advanced toward the inner wall of the cylinder and the lower fixture 1210 is fixed more firmly. On the arc-shaped side of the support portion, silicone protrusions or silicone pads can be pasted to prevent the lower fixture 1210 from sliding.

[0100] The radius of the lower clamp 1210 is the same as the inner diameter of the outer cylinder 121. An opening is formed at the center of the lower clamp 1210 through which the flexible shaft 1300 can pass.

[0101] A wheel cutter 1220 is installed on the lower side of the lower clamp 1210. The wheel cutter 1220 is connected to the flexible shaft 1300, so as to receive the rotation force of the motor 1120 and thereby cut the inner wall of the cylinder. The wheel cutter 1220 can pressurize the inner wall of the cylinder by means of hydraulic pressure. The cutting blade of the wheel cutter 1220 is elastically pressurized from the main body of the wheel cutter 1220 in the radial direction, so that one side of the inner wall of the cylinder is pressurized and cuts in the outer direction. The present invention can minimize the scattering of foreign matter inside the steam generator by using the moisture separator cutting device to cut the cylinder by pressing into the cylinder.

[0102] A level 1211 may also be provided on the upper side of the lower fixture 1210. The lower fixture 1210 is arranged in parallel with the wheel cutter 1220. When the lower fixture 1210 is located at a position inclined with respect to the inner wall of the cylinder, the cylinder may be cut at an angle. If the cylinder is cut at an angle, the replacement cylinder portion may be tilted when the replacement cylinder portion is welded again. The level 1211 can ensure that the lower fixture 1210 is accurately supported horizontally inside the outer cylinder 121, thereby ensuring that the wheel cutter 1220 can accurately cut the outer cylinder 121 horizontally. The level 1211 may be in a fluorescent color that is easy to identify inside the outer cylinder 121.

[0103] The fixing module 1100 and the cutting module 1200 are arranged in a manner that they are separated by the cutting length of the cylinder. The fixing module 1100 and the cutting module 1200 are connected by means of a flexible shaft 1300, and the length of the flexible shaft 1300 can be set in advance according to the cutting length of the cylinder. The flexible shaft 1300 is used to transmit the rotational force of the motor 1120 to the wheel cutter 1220.

[0104] like Figure 6 As shown, a main shaft 1310, a first connecting rod 1320 and a second connecting rod 1330 may be provided in the flexible shaft 1300. The length of the main shaft 1310 may be set according to a predetermined length of the replacement moisture separator. One end of the main shaft 1310 is connected to one end of the first connecting rod 1320. The other end of the first connecting rod 1320 is connected to the shaft of the motor 1120 mounted on the first upper clamp 1111. The other end of the main shaft 1310 is connected to the second connecting rod 1330. When the first connecting rod 1320 and the second connecting rod 1330 are folded, the overall length of the cutting device may be shortened.

[0105] like Figure 7 As shown, the first connecting rod 1320 and the second connecting rod 1330 move in a state of being folded to 90° when the cutting device 100 moves to the inside of the outer cylinder 121. The gap between the moisture separator 120 and the steam dryer 130 is about 15 cm, and the narrow gap makes it difficult for the cutting device 1000 to move as a whole. By rotating the first connecting rod 1320 and the second connecting rod 1330 90° relative to the axial direction and thereby folding the cutting device 1000, the cutting module 1200 can be moved to the inside of the outer cylinder 121. When the fixing module 1100 is moved toward the side of the outer cylinder 121 after the cutting module 1200 is moved to the inside of the outer cylinder 121, the cutting module 1200 will move to the bottom of the outer cylinder 121, and the first connecting rod 1320 and the second connecting rod 1330 will rotate relative to the main shaft 1310. With the help of the rotation of the first connecting rod 1320 and the second connecting rod 1330, the flexible shaft 1300 can be converted into a straight line. By virtue of the rotation of the motor 1120 , when the flexible shaft 1300 is rotated, torque may be transmitted to the wheel cutter 1220 .

[0106] The first connecting rod 1320 and the second connecting rod 1330 have the same structure, and the following description will be based on the second connecting rod 1330. Figure 8 As shown, the second link 1330 is provided with a first link member 1331, a second link member 1332 and a shaft coupling portion 1333. The first link member 1331 and the second link member 1332 are connected in a manner that they can rotate around the shaft coupling portion 1333. The first link member 1331 and the second link member 1332 are provided with extension portions 1333a, 1333b and recessed portions 1334a, 1334b, respectively.

[0107] The extensions 1333a and 1333b are portions extending from the ends of the first link member 1331 and the second link member 1332 in the longitudinal direction and are formed symmetrically with respect to the axes of the first link member 1331 and the second link member 1332. Recesses 1334a and 1334b are formed between the extensions 1333a and 1333b.

[0108] Between the pair of extensions, a connecting shaft or a connecting protrusion is arranged in a direction perpendicular to the axial direction of the connecting rod member. The first connecting rod member 1331 and the second connecting rod member 1332 can be connected to the shaft joint portion 1333 by means of the connecting shaft or the connecting protrusion, so that they can be rotated in a range of 0 to 90 degrees in one direction. When the first connecting rod member 1331 and the second connecting rod member 1332 folded to 90 degrees are relatively rotated to align their axial directions, the flexible shaft 1300 will become a straight line.

[0109] When the first link member 1331 and the second link member 1332 are in a straight line, the extension 1333a of the first link member 1331 will be coupled to the recessed portion 1334b of the second link member 1332, and the extension 1333b of the second link member 1332 will be coupled to the recessed portion 1334a of the first link member 1331. The first link member 1331 and the second link member 1332 will be fixed by means of the embedding and coupling of the extension and the recessed portion, respectively, so that they will not be easily separated in the circumferential direction even when the flexible shaft 1300 rotates. In this way, the rotational force can be directly transmitted to the wheel cutter 1220 during the rotation of the flexible shaft 1300.

[0110] Fig. 9 2 is a schematic diagram illustrating the installation state of the horizontal adjustment rod in the moisture separator cutting device according to an embodiment of the present invention, and Fig.10 It is a schematic diagram illustrating a state in which a horizontal adjustment rod in a moisture separator cutting device according to an embodiment of the present invention adjusts the level of the device.

[0111] like Fig. 9 As shown, after the upper clamp 1110 is fixed at the upper end of the outer cylinder 121, a plurality of horizontal adjustment rods 1410, 1420, 1430 are installed. The plurality of horizontal adjustment rods 1410, 1420, 1430 are installed at specific angle intervals, and by adjusting the interval distance between the upper clamp 1110 and the lower clamp 1210, the horizontal state of the lower clamp 1210 can be adjusted.

[0112] like Fig.10As shown, a threaded portion 1411 is formed at the upper end of the horizontal adjustment rods 1410, 1420, and 1430. A horizontal adjustment rod fixing block 1433 for fixing the horizontal adjustment rod 1410 is arranged at the upper end of the upper clamp 1110. By inserting the horizontal adjustment rod 1410 into the horizontal adjustment rod fixing block 1433 along the axial direction of the cylinder, the lower end of the horizontal adjustment rod 1410 can be brought into contact with the upper side surface of the lower clamp 1210. In order to bring the plurality of horizontal adjustment rods 1410, 1420, and 1430 into contact with a plurality of spaced positions on the upper side surface of the lower clamp 1210, the horizontal adjustment rod fixing blocks 1433 can be arranged at specific angular intervals.

[0113] The level is adjusted by adjusting the plurality of level adjustment rods 1410, 1420, 1430 upward or downward until the level gauge 1211 on the lower fixture 1210 indicates a horizontal state. After the level adjustment of the lower fixture 1210 is completed, the bolts 1422 are tightened above and below the level adjustment rod fixing block 1433, so that the level adjustment rod 1410 is tightly fixed to the level adjustment rod fixing block 1433.

[0114] At least two horizontal adjustment rods 1410 , 1420 , and 1430 may be provided, but the present invention is not limited thereto. In the present embodiment, three horizontal adjustment rods 1410 , 1420 , and 1430 are used.

[0115] After the horizontal adjustment rods 1410, 1420, and 1430 are fixed, the lower clamp 1210 is pressed against the inner wall of the cylinder by advancing the hydraulic cylinder of the lower clamp 1210. Next, the wheel cutter 1220 is driven to work by applying power to the motor 1120, thereby cutting the outer cylinder 121. After the outer cylinder 121 is cut, the cut outer cylinder 121 is removed with the cutting device 1000 installed.

[0116] Fig.11 It is a schematic diagram illustrating the state of different cutting modules installed in the moisture separator cutting device according to an embodiment of the present invention.

[0117] In addition, the present invention can be applied to the outer cylinder 121 and the inner cylinder 123 when cutting the moisture separator. Fig.11 As shown, the cutting module 1200 can be equipped with a cutting module 1200 corresponding thereto according to the cutting of the outer cylinder 121 or the inner cylinder 123. The moisture separator cutting device 1000 can be fixed to the upper end of the outer cylinder 121 when cutting the outer cylinder 121 or the inner cylinder 123. That is, only the cutting module 1200 can be replaced as needed while keeping the fixing module 1100 fixed to the outer cylinder 121 unchanged.

[0118] The radius of the lower clamp 1210 and the wheel cutter 1220 corresponds to the radius of the outer cylinder 121 or the inner cylinder 123. The cutting device 1000 according to the present invention can be used to cut the outer cylinder and the inner cylinder by replacing only the cutting module 1200. Due to the need to perform the cutting operation quickly, it is advisable to prepare a plurality of cutting devices for the outer cylinder and the inner cylinder and perform the operation quickly. In order to cut the uppermost outer cylinder of the replacement object, i.e., the moisture separator, the cutting device 1000 is used in a state where the flexible shaft 1300 is folded, but when the inner cylinder and the outer cylinder are cut next, because the outer cylinder at the upper end is removed, the cutting device can be directly installed in the outer cylinder 121' with the flexible shaft 1300 unfolded.

[0119] Fig.12 is a schematic diagram illustrating the sequence of cutting a moisture separator using the moisture separator cutting device according to an embodiment of the present invention, Fig.13 A schematic diagram illustrating the sequence of cutting a moisture separator using a moisture separator cutting device according to an embodiment of the present invention, Fig.14 2 is a schematic diagram illustrating a state where the moisture separator cutting device according to an embodiment of the present invention is installed in an outer cylinder and an inner cylinder. Fig.15 It is a schematic diagram illustrating the state of cutting the outer cylinder and the inner cylinder using the moisture separator cutting device according to an embodiment of the present invention.

[0120] Before cutting the moisture separator, first determine the moisture separator 120 that needs to be maintained. Figure 3 As shown, a plurality of moisture separators 120 are radially arranged with the approach channel 150 as the center. Through non-destructive inspection, when the thickness of the inner cylinder 123 is below a reference value, it can be determined that replacement is required. Alternatively, a humidity sensor can be installed on the upper side of the outer cylinder 121 of each moisture separator 120, and when the dryness of the discharged steam is below a specific value, it is determined that the inner cylinder 123 of the corresponding moisture separator 120 has deteriorated and is confirmed as a replacement object. In the step of determining the moisture separator to be maintained in this embodiment, the dryness of the flowing steam can be measured using humidity sensors respectively installed on the upper parts of the plurality of moisture separators, and the corresponding moisture separator can be determined as a replacement object when the dryness value is below a specific value.

[0121] Next, a process of cutting the outer cylinder 121 using the moisture separator cutting device 1000 will be described.

[0122] like Fig.12As shown in (a) of FIG. 1 , the cutting device 1000 is moved between the moisture separator 120 and the steam dryer 130. The first connecting rod 1320 and the second connecting rod 1330 of the cutting device 1000 are moved in a state of being folded to 90° when they are moved to the inside of the outer cylinder 121. When the fixing module 1100 is moved toward the side of the outer cylinder 121 after the cutting module 1200 is moved to the inside of the outer cylinder 121, the cutting module 1200 moves downward and the flexible shaft 1300 becomes a straight line.

[0123] After the cutting module 1200 is moved to the interior of the outer cylinder 121, the groove at the bottom of the first upper clamp 1111 is embedded into the upper end of the outer cylinder 121. Next, the groove at the bottom of the second upper clamp 1112 is embedded into the upper end of the outer cylinder 121 ( Fig.12 After the first upper clamp 1111 and the second upper clamp 1112 are inserted, the cutting device 1000 is fixed to the outer cylinder 121 by fastening both ends of the first upper clamp 1111 and the second upper clamp 1112 ( Fig.13 (a) in the figure.

[0124] After the upper clamp 1110 is fixed to the upper end of the outer cylinder 121, the level of the lower clamp 1210 is adjusted by installing a plurality of level adjustment rods 1410, 1420, 1430. The level state can be adjusted by checking the level gauge on the lower clamp 1210. After the level adjustment is completed, the outer cylinder 121 is cut from the inside by starting the wheel cutter 1220. The cut portion is removed together with the cutting device 1000 ( Fig.13 (c) in the figure.

[0125] In this embodiment, the cutting of the outer cylinder 121 is taken as an example, but the inner cylinder 123 can also be cut by the same method.

[0126] like Fig.14 As shown, in order to cut the inner cylinder 123, the cutting device 1000 equipped with the cutting module 1200B for inner cylinder cutting is moved to the inside of the inner cylinder. Because the uppermost end of the outer cylinder 121 has been removed, there is no need to fold the connecting rod of the cutting device 1000. The cutting module 1200 is moved to the inside of the inner cylinder 123, and the fixing module 1100 is fixed to the upper end of the outer cylinder 121. After the first upper clamp 1111 and the second upper clamp 1112 are embedded in the outer cylinder 121, the cutting device 1000 is fixed to the outer cylinder 121 by tightening the two ends of the first upper clamp 1111 and the second upper clamp 1112.

[0127] After the upper clamp 1110 is fixed to the upper end of the outer cylinder 121, the level of the lower clamp 1210 is adjusted by installing a plurality of level adjustment rods 1410, 1420, 1430. The level state can be adjusted by checking the level gauge on the lower clamp 1210. After the level adjustment is completed, the inner cylinder 123 is cut from the inside by starting the wheel cutter 1220. The cut portion is removed together with the cutting device 1000.

[0128] The order of removing the outer cylinder and the inner cylinder is as follows.

[0129] like Fig.15 As shown, the upper end of the outer cylinder 121 is cut. The outer cylinder 121 will be cut at a position slightly higher than the upper end of the inner cylinder 123 disposed on the inner side of the outer cylinder 121. After the upper portion of the outer cylinder 121 is cut, the upper portion of the inner cylinder 123 will be exposed below the cut surface of the outer cylinder 121.

[0130] Next, the upper portion of the exposed inner cylinder 123 is cut. To cut the inner cylinder, a device is fixed to the cut upper end of the outer cylinder 121. The cutting device is equipped with a cutting device for the inner cylinder, so as to enter the interior of the inner cylinder and cut the upper portion of the inner cylinder.

[0131] After the upper portion of the inner cylinder 123 is cut, the upper portion of the cut outer cylinder 121 is cut again. The second cutting position of the outer cylinder 121 is located above the cutting position of the inner cylinder 123. The cut parts are moved to the outside of the steam generator.

[0132] The parts cut in the respective steps will be moved to the outside of the steam generator 100 through the walkway 160 .

[0133] A large amount of dust will be generated during the replacement of the components of the moisture separator 120. When each step is performed, the dust is sucked by a vacuum cleaner.

[0134] When performing the replacement operation of the moisture separator, the radiation value needs to be confirmed before the operation, and a warning sound can be issued when the radiation value changes during the operation or the value reaches a specific value or above. In addition, the oxygen concentration inside the steam generator 100 can be measured, and a warning sound can be issued when the oxygen concentration value is below a specific value. In addition to the warning sound, the terminal held by the operator can also be vibrated, or a warning of the on-site situation can be issued through a light such as a bulb. A sensor or a warning component can also be installed in the cutting device.

[0135] The present invention performs a cutting operation on a cylinder by inserting a device into the interior of the cylinder. Since the cutting operation is performed through the interior space of the cylinder, the cutting operation can be effectively performed in a narrow space. In addition, since the cylinder is cut inside the cylinder, the phenomenon of dust generated during cutting being discharged to the outside of the cylinder can be minimized. Dust and the like will be accumulated at the lower end of the outer cylinder 121 and the lower end of the inner cylinder 123.

[0136] In order to prevent foreign matter from flowing into the lower side of the moisture separator 120, a foreign matter inflow prevention cover may be installed. The foreign matter inflow prevention cover may prevent foreign matter such as dust and sparks generated during the operation from falling to the bottom of the steam generator 100. In the replacement operation of the moisture separator 120, a cutting machine will be used in the process of removing the moisture separator 120, and welding will be performed in the process of installing the new moisture separator 120, which may cause a fire hazard due to dust or sparks. In order to prevent the above-mentioned problems, a foreign matter inflow prevention cover may be formed using flame retardant materials. In another embodiment, in order to prevent the fallen dust from floating again inside the steam generator 100, an adhesive component may be applied to the surface.

[0137] In the above content, an embodiment of the present invention is described, but a person having general knowledge in the relevant technical field can make various modifications and changes to the present invention by adding, changing, deleting or adding constituent elements without departing from the scope of the idea of ​​the present invention, and these modifications and changes are included in the scope of the claims of the present invention.

Claims

1. A moisture separator cutting device, characterized in that: include: A fixing module, equipped with an upper fixture and a motor configured on the upper fixture; a cutting module equipped with a lower clamp and a wheel cutter mounted on the lower side of the lower clamp; and, A flexible shaft connects the fixing module and the cutting module and is used to transmit the rotational force of the motor to the wheel cutter.

2. The moisture separator cutting device according to claim 1, characterized in that: At least two connecting rods are provided in the flexible shaft.

3. The moisture separator cutting device according to claim 2, characterized in that: The connecting rod is provided with a first connecting rod component and a second connecting rod component. An extended portion and a recessed portion are formed in the first link member and the second link member, respectively.

4. The moisture separator cutting device according to claim 1 or claim 2, characterized in that: Also includes: At least one horizontal adjustment rod passes through the fixing module and is arranged in the axial direction of the cylinder.

5. The moisture separator cutting device according to claim 4, characterized in that: A threaded portion is formed on an upper portion of the horizontal adjustment rod.

6. The moisture separator cutting device according to claim 5, characterized in that: The horizontal adjustment rod is fixed on the upper clamp by means of a horizontal adjustment rod fixing block.

7. The moisture separator cutting device according to claim 1 or claim 2, characterized in that: The upper clamp is provided with a first upper clamp and a second upper clamp, The first upper clamp and the second upper clamp are semicircular in shape, and have protrusions formed at both ends.

8. The moisture separator cutting device according to claim 7, characterized in that: A groove is formed at the lower portion of the first upper clamp and the second upper clamp.

9. The moisture separator cutting device according to claim 8, characterized in that: Silicone pads are provided inside the grooves of the first upper clamp and the second upper clamp.

10. The moisture separator cutting device according to claim 1 or claim 2, characterized in that: The motor is assembled and disassembled on the upper fixture.

11. The moisture separator cutting device according to claim 1 or claim 2, characterized in that: A level is mounted on the lower fixture.

12. The moisture separator cutting device according to claim 1 or claim 2, characterized in that: The wheel cutter is elastically pressurized in a radial direction by means of hydraulic pressure.

13. A method for cutting a moisture separator, characterized in that: A method for cutting an outer cylinder of a moisture separator using a moisture separator cutting device including a fixing module, a cutting module and a flexible shaft includes: The step of moving the moisture separator cutting device to the interior of the outer cylinder with the flexible shaft folded; A step of inserting a first upper fixture into the upper end of the outer cylinder after the cutting module is introduced into the interior of the outer cylinder; After the second upper clamp is embedded into the upper end of the outer cylinder, the first upper clamp and the second upper clamp are fastened; a step of adjusting the level of the cutting module by means of at least one level adjustment rod; and The step of cutting the outer cylinder by using the cutting module.

14. The moisture separator cutting method according to claim 13, characterized in that: Also includes: After executing the step of cutting the outer cylinder by using the cutting module, the step of sucking in dust is performed.

15. The moisture separator cutting method according to claim 13, characterized in that: The oxygen concentration is measured, and a warning sound is emitted when the oxygen concentration value is below a specific value.

16. The moisture separator cutting method according to claim 13, characterized in that: Also includes: The radiation concentration is measured, and a warning sound is emitted when the radiation concentration is equal to or higher than a specific value.

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