Welding device and welding method for moisture separator

Abstract

The invention discloses a welding device for a moisture separator. The welding device comprises a fixing part, a main body part and a welding part, the welding part slides along the length direction on the fixed part, and the welding torch can slide in the horizontal direction. The welding torch and the repair welding material supply assembly are close to the inner wall of the air cylinder and weld the connecting part of the air cylinder. According to the invention, the welding part can slide and move on the fixed part, so that the length of the welding device is shortened, and the main body part rotates relative to the fixed part, so that the device can be quickly and accurately welded and removed even in a narrow internal space of the steam generator; in addition, the moisture separator can be effectively replaced even in a narrow space.

Description

Technical Field

[0001] The invention relates to a moisture separator welding device and a welding 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. However, in the above situation, 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 costs. In the case of only maintaining the moisture separator, it is difficult to replace it with a general cutting device or welding device because there are multiple moisture separators arranged adjacent to each other on the steam generator and the interior is small. In particular, when welding new parts, it is difficult to approach from the outside of the moisture separator due to the interference of adjacent moisture separators. Therefore, it is necessary to develop a device that can quickly weld multiple moisture separator replacement parts.

[0006] Prior art literature

[0007] Patent Literature

[0008] Registered patent No. 10-2370361 (Name: Plug welding device for defective heat transfer pipes of steam generators) Summary of the invention

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

[0010] A moisture separator welding device according to one embodiment of the present invention includes a fixing portion, a main body portion and a welding portion. The fixing portion is formed in an annular shape, and at least one fixing guide and at least one fixing bracket may be provided at the lower end portion. A guide track may be provided on the inner side of the fixing portion. One end of the main body portion is mounted on the guide track and may be mounted in a manner that can move along the guide track. The main body portion may be extended perpendicular to the radial direction of the fixing portion. The welding portion may be coupled to the main body portion in a manner that can slide and move along the length direction of the main body portion. The welding portion may be equipped with a welding torch and a welding repair material supply assembly.

[0011] In the moisture separator welding device according to one embodiment of the present invention, the main body may be equipped with a connecting rod that rotates relative to the fixing part.

[0012] In the moisture separator welding device according to one embodiment of the present invention, the welding part may also be equipped with a camera.

[0013] In the moisture separator welding device according to one embodiment of the present invention, the main body can move in a circumferential direction along the guide track.

[0014] In the moisture separator welding device according to one embodiment of the present invention, the welding torch is installed at the end of the welding part and can be installed in a manner that it can move in the horizontal direction.

[0015] In the moisture separator welding device according to one embodiment of the present invention, the welding repair material supply assembly can rotate on the side of the welding part.

[0016] In the moisture separator welding device according to one embodiment of the present invention, the electrode of the welding torch may be tungsten.

[0017] In the moisture separator welding device according to one embodiment of the present invention, a folding component may be further provided on the fixing portion, a folding shaft may be provided on one side of the main body, and when the main body rotates, one end of the folding shaft may pass through the opening of the folding component.

[0018] According to another embodiment of the present invention, a moisture separator welding device may include a fixing portion, a main body portion and a welding portion. The fixing portion is formed in a disc shape and may be equipped with at least one fixing guide and at least one fixing bracket. A motor may be installed at the center of the main body portion. One end of the main body portion may be connected to the motor of the fixing portion. The main body portion may be extended perpendicular to the radial direction of the fixing portion and rotated by means of the motor. The welding portion may be coupled to the main body portion in a manner that it can move along the length direction of the main body portion. A welding torch and a welding material supply assembly may be installed at the lower end of the welding portion.

[0019] In a moisture separator welding device according to another embodiment of the present invention, the welding torch is installed at the end of the welding portion and can be installed in a manner that it can move in the horizontal direction.

[0020] In a moisture separator welding device according to another embodiment of the present invention, the welding part may also be equipped with a camera.

[0021] In the moisture separator welding device according to another embodiment of the present invention, the welding filler material supply assembly can be rotated on the side of the welding portion.

[0022] In a moisture separator welding device according to another embodiment of the present invention, the electrode of the welding torch may be tungsten.

[0023] A moisture separator welding method according to one embodiment of the present invention may include: a step of configuring the moisture separator welding device at the upper end of the outer cylinder in a state of being installed on the replacement outer cylinder; a step of welding the connection portion between the outer cylinder and the replacement outer cylinder while the welding part rotates inside the outer cylinder; a step of sliding the welding part to the upper end of the main body after welding is completed; a step of folding the main body by rotating the folding part on the fixing part; and a step of removing the moisture separator welding device from the outer cylinder.

[0024] The moisture separator welding method according to one embodiment of the present invention may further include: after performing the step of welding the connection portion between the outer cylinder and the replacement outer cylinder, the step of sucking in dust.

[0025] According to the moisture separator welding 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 welding 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 welding 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 welding device, the welding device can easily enter the interior of the moisture separator even when the gap is narrow. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram illustrating the structure of the steam generator of the present invention.

[0030] Figure 2 It is a schematic diagram illustrating the configuration state of the moisture separator of the present invention.

[0031] Figure 3 It is a schematic diagram illustrating the configuration state of the moisture separator of the present invention.

[0032] Figure 4 It is a schematic diagram illustrating a moisture separator welding device according to an embodiment of the present invention.

[0033] Figure 5 It is a schematic diagram illustrating a folding component and a folding axis in a moisture separator welding device according to an embodiment of the present invention.

[0034] Figure 6 It is a schematic diagram illustrating a welding portion in a moisture separator welding device according to an embodiment of the present invention.

[0035] Figure 7 The diagram is a schematic diagram illustrating the sequence of welding a moisture separator using the moisture separator welding device according to an embodiment of the present invention.

[0036] Figure 8 It is a schematic diagram illustrating a moisture separator welding device according to another embodiment of the present invention.

[0037] Fig. 9 It is a schematic diagram illustrating a moisture separator welding device according to another embodiment of the present invention.

[0038] Fig.10 The diagram is a schematic diagram illustrating the sequence of welding a moisture separator using a moisture separator welding device according to another embodiment of the present invention.

[0039] Fig.11 It is a schematic diagram illustrating the sequence of welding an outer cylinder and an inner cylinder using a moisture separator welding device according to an embodiment of the present invention.

[0040]

Explanation of symbols

[0041] 100: Steam generator

[0042] 120A: Moisture separator unit

[0043] 120: Moisture separator

[0044] 121: Outer cylinder

[0045] 123: Inner cylinder

[0046] 130: Steam dryer

[0047] 1000, 2000: Moisture separator welding device

[0048] 1100, 2100: Fixed part

[0049] 1110: Fixed guide

[0050] 1120: Fixed bracket

[0051] 1130: Guide track

[0052] 1140: Folding parts

[0053] 1200, 2200: Main body

[0054] 1220: Folding Axis

[0055] 1300, 2300: welding department

[0056] 1310, 2310: welding torch

[0057] 1320, 2320: Welding material supply components DETAILED DESCRIPTION

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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 .

[0065] like Figure 2 As 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] However, the gap between the outer cylinder 121 of the moisture separator 120 and the steam dryer 130 is relatively small, only about 15 cm. Figure 2 As shown, after the welding Y of the outer cylinder 121 is completed, the welding device needs to be removed, and it is not easy to recover the welding device from between the outer cylinder 121 and the steam dryer 130. Figure 3 As shown, since a plurality of moisture separators 120 are arranged at narrow intervals, when welding one moisture separator 120 , the welding operation is not easy due to interference with adjacent moisture separators 120 .

[0072] The present invention relates to a welding device 1000, which can perform welding 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 welding a moisture separator 120, and by adopting a folding method, the welding device 1000 can be easily recovered to the outside of the outer cylinder 121 even in a narrow gap.

[0073] Figure 4 is a schematic diagram illustrating a moisture separator welding device according to an embodiment of the present invention, Figure 5 is a schematic diagram illustrating a folding component and a folding axis in a moisture separator welding device according to an embodiment of the present invention, Figure 6 2 is a schematic diagram illustrating a welding portion in a moisture separator welding device according to an embodiment of the present invention, and Figure 7 The diagram is a schematic diagram illustrating the sequence of welding a moisture separator using the moisture separator welding device according to an embodiment of the present invention.

[0074] like Figure 4 As shown, the moisture separator welding device 1000 according to an embodiment of the present invention includes a fixing part 1100 , a main body part 1200 and a welding part 1300 .

[0075] The fixing part 1100 is formed in a ring shape. A fixing guide 1110, a fixing bracket 1120, a guide rail 1130, and a folding member 1140 are provided in the fixing part 1100. The fixing part 1100 is fixed to the upper end of the outer cylinder 121. In order to fix the fixing part 1100 to the upper end of the outer cylinder 121, at least one fixing guide 1110 and at least one fixing bracket 1120 are installed at the lower part of the fixing part 1100.

[0076] The fixing guide 1110 is embedded and installed in a slit formed at the lower end of the fixing part 1100. The outer side surface of the fixing guide 1110 contacts the inner side surface of the outer cylinder 121. At least one fixing guide 1110 is provided, and in this embodiment, two fixing guides 1110 are installed. The fixing guide 1110 is pressed against the inner side surface of the outer cylinder 121 by a force acting from the center side of the outer cylinder 121 to the outside, thereby fixing the fixing part 1100 to the outer cylinder.

[0077] The fixing bracket 1120 is installed at the lower end of the fixing part 1100. A pressing component 1121 and a pair of compression components 1122 are provided in the fixing bracket 1120. The pressing component 1121 can be installed in a manner that it can move from the outside to the inside of the fixing part 1100. The compression component 1122 can adopt a gentle "V" shape. The center of the compression component 1122 is mounted to the lower end of the fixing part 1100 by means of an axis. The compression component 1122 can rotate around the axis. The compression component 1122 can be provided in pair. When the fixing part 1100 is mounted to the upper end of the outer cylinder, the pair of compression components 1122 will contact the inner side surface of the outer cylinder.

[0078] When the pressing member 1121 is pressed from the outside of the fixing portion 1100, one side of the pair of pressing members 1122 will be pushed toward the inside of the outer cylinder. When one side of the pressing member 1122 rotates toward the inside of the cylinder, the other side of the pressing member 1122 rotates toward the outside of the cylinder and pushes the inside of the cylinder.

[0079] That is, after the fixing part 1100 is located at the upper end of the outer cylinder, a pair of pressing parts 1122 of the fixing bracket 1120 will push the inner side of the outer cylinder, and with the help of the force acting from the center side of the outer cylinder 121 toward the outside by the fixing guide 1110, it will stick to the inner side surface of the outer cylinder, thereby firmly fixing the fixing part 1100 to the upper end of the outer cylinder.

[0080] In another embodiment, a circular groove parallel to the outer circumference of the fixing part 1100 may be formed on the lower side of the fixing part 1100. The thickness of the groove is the same as that of the outer cylinder 121, and the radius of the groove is the same as that of the outer cylinder 121. The groove of the fixing part 1100 is embedded and installed in the upper end of the outer cylinder 121. A component for preventing sliding may also be provided on the inner side of the groove. For example, a silicone protrusion or a silicone pad may be pasted on the inner side of the groove.

[0081] The guide rail 1130 is installed inside the fixing part 1100. The guide rail 1130 is formed in a ring shape along the inside of the fixing part 1100, and at least one rail may be arranged toward the center of the fixing part 1100. When two or more rails are arranged, they may be arranged in parallel with a certain distance from each other.

[0082] The folding member 1140 may be disposed on one side of the fixing portion 1100. The folding member 1140 is formed with an opening through which a folding shaft 1220 to be described later passes.

[0083] The main body 1200 is in a bar shape and extends in a direction perpendicular to the radial direction of the fixing part 110. The upper end of the main body 1200 is installed so as to be movable in the circumferential direction along the inner guide rail 1130 of the fixing part 1100. The main body 1200 moves along the guide rail 1130 by means of a driving part (not shown) installed at the upper end.

[0084] like Figure 5 As shown, a connecting rod 1210 and a folding shaft 1220 are provided in the main body 1200. The connecting rod 1210 is formed in the main body 1200 so as to be rotatable relative to the fixing part 1100. When the main body 1200 is subjected to a force in the direction of the cylinder inner side, the connecting rod 1210 formed at the upper end can be folded.

[0085] A folding shaft 1220 may be connected to one side of the main body 1200 . The folding shaft 1220 may guide the rotation of the main body 1200 .

[0086] One end of the folding shaft 1220 is connected to one side of the main body 1200, and the other end of the folding shaft 1220 passes through the opening of the folding member 1140. When the main body 1200 is folded toward the inner side of the cylinder, the other end of the folding shaft 1220 passes through the opening of the folding member 1140 and is located on one side of the upper part of the fixing part 1100 ( Figure 5 (b) in the figure.

[0087] In another embodiment, the folding shaft 1220 may be a hydraulic cylinder. Both ends of the folding shaft 1220 are respectively fixed to the fixing portion 1100 and the main body 1200, so that the overall length of the folding shaft 1220 can be adjusted by stretching or compressing the folding shaft 1220. In the above case, by means of compression and rotation of the folding shaft 1220, the main body 1200 can rotate toward the fixing portion 1100.

[0088] The welding part 1300 is connected to the other end of the main body 1200. The welding part 1300 is extended along the length direction of the main body 1200. The welding part 1300 can slide on the main body 1200 in the length direction of the main body 1200. With the help of the sliding movement of the welding part 1300, the welding height can be adjusted. In addition, the overall length of the main body 1200 and the welding part 1300 can also be adjusted. The overall length of the main body 1200 and the welding part 1300 overlapping each other can be less than the diameter of the fixing part 1100.

[0089] like Figure 6 As shown, a welding torch 1310, a welding material supply assembly 1320, and at least one camera 1330 may be installed at the lower end of the welding portion 1300. The electrode of the welding torch 1310 may be tungsten. The welding torch 1310 may receive a supply of gas such as argon from a gas nozzle. The welding torch 1310 is configured in the radial direction of the cylinder so that the head faces the inner wall of the cylinder. In order to adjust the distance between the inner wall of the cylinder and the welding torch 1310, the welding torch 1310 may slide and move in the radial direction of the cylinder. A power source, a gas supply, and a cable for control are connected to the welding torch 1310.

[0090] A welding material supply assembly 1320 is arranged adjacent to the welding torch 1310. For example, the welding material supply assembly 1320 can be installed on the side of the welding part 1300. The welding material supply assembly 1320 is used to draw out the welding material from the welding material nozzle. The welding material can be introduced into the molten pool of the parent material during welding. In order to accurately introduce the welding material into the molten pool of the parent material, the welding material supply assembly 1320 can be rotated at a certain interval on the side of the welding part 1300. The welding material supply assembly 1320 can adjust the introduction angle of the welding material by rotating. In this way, the welding material supply assembly 1320 can prevent unspecified interference during the welding operation. A welding material wire is connected to the welding material supply assembly 1320.

[0091] At least one camera 1330 may be installed at the lower end of the welding part 1300. The camera may be at least one of a welding observation camera and a weld bead observation camera. The welding observation camera may be installed between the welding torch 1310 and the welding material supply assembly 1320. The welding observation camera may detect defects such as cracks or uneven welding at the welding part by taking real-time photos near the welding. The welding observation camera may send the location and size of the defective part to the control part of the welding device. The control part may verify the soundness of the welding in real time through the transmitted image. The welding observation camera may adjust the focal distance when necessary by moving the lens horizontally.

[0092] The welding bead observation camera can confirm the soundness of welding by observing the welding beads generated during the welding process. When welding defects are found through the welding observation camera and the welding bead observation camera, the control unit can move the welding torch 1310 to the corresponding position and weld again.

[0093] Next, the steps of welding the outer cylinder using the moisture separator welding device according to one embodiment of the present invention will be described. According to the moisture separator welding device according to one embodiment of the present invention, the welding device can be installed or removed even in a narrow place, and after welding, the welding device can be folded so that it can pass through the narrow gap between the moisture separator and the steam dryer.

[0094] In order to weld the outer cylinder 121 with the cut upper end and the replacement outer cylinder 121', the moisture separator welding device 1000 is installed on the upper end of the replacement cylinder 121'. The moisture separator welding device can be installed in a state where the fixing part 1100 and the main body 1200 are vertically connected and unfolded.

[0095] like Figure 7 As shown in (a) of FIG. 1 , the replacement outer cylinder 121 ′ having the moisture separator welding device 1000 mounted on the upper end is arranged on the outer cylinder 121. The main body 1200 may be mounted in a state of being perpendicular to the fixing part 1100.

[0096] After adjusting to a position where the lower end of the replacement outer cylinder 121' contacts the upper end of the outer cylinder 121, first slide the welding part 1300 up and down on the main body 1200, so that the welding torch 1310 approaches the welding position. After adjusting the height of the welding torch 1310, slide the welding torch 1310 horizontally toward the inner side of the outer cylinder. By moving in the radial direction, the welding torch 1310 can be brought close to the welding position.

[0097] After the position of the welding torch 1310 is determined, welding is started. During the welding process, the welding material supply assembly 1320 is rotated and the welding material is supplied. After the welding at the starting position is completed, the main body 1200 can be moved on the guide rail 1130, so that the welding part 1300 moves in the circumferential direction on the inner side of the outer cylinder 121. While the welding torch 1310 is moved in the circumferential direction on the inner wall of the outer cylinder 121, the connection part of the outer cylinder 121 and the replacement outer cylinder 121' is welded.

[0098] After welding is completed, the welding part 1300 is slid to the upper end of the main body 1200, so that the length of the main body 1200 and the welding part 1300 reaches the minimum length. Next, the main body 1200 and the welding part 1300 are accommodated in the space in the fixing part 1100 by rotating the folding shaft 1220 ( Figure 7 (c) in the figure). The moisture separator welding device 1000 folded to the thickness of the fixing portion 1100 can be easily drawn out even in a narrow gap between the outer cylinder 121 and the steam generator.

[0099] The present invention can easily perform welding even in a narrow space by performing welding work inside the outer cylinder 121 , and can prevent dust generated during welding from scattering to the outside of the outer cylinder 121 .

[0100] Figure 8 is a schematic diagram illustrating a moisture separator welding device according to another embodiment of the present invention, Fig. 9 is a schematic diagram illustrating a moisture separator welding device according to another embodiment of the present invention, and Fig.10 The diagram is a schematic diagram illustrating the sequence of welding a moisture separator using a moisture separator welding device according to another embodiment of the present invention.

[0101] The present invention can weld the inner cylinder by changing the driving radius of the welding part. Because the radius of the inner cylinder is smaller than that of the outer cylinder, it is difficult to move the main body by means of the guide rail. The inner cylinder can be constructed in a manner that the main body itself can rotate.

[0102] Specifically, if Figure 8 As shown, the moisture separator welding device 2000 according to an embodiment of the present invention includes a fixing part 2100 , a main body part 2200 and a welding part 2300 .

[0103] The fixing part 2100 is formed in a disk shape and includes a fixing guide, a fixing bracket, and a head motor 2130 .

[0104] The fixing part 2100 is fixed to the upper end of the outer cylinder 121. In order to fix the fixing part 2100 to the outer cylinder 121, at least one fixing guide and at least one fixing bracket are installed at the lower part of the fixing part 2100.

[0105] Since the structures of the fixing guide and the fixing bracket are the same as those described above, the related description will be omitted. The fixing part 2100 can be firmly fixed to the upper end of the outer cylinder by the force of a pair of pressing members of the fixing guide and the fixing bracket pushing the inner side of the outer cylinder.

[0106] In another embodiment, a circular groove parallel to the outer circumference may be formed on the lower side of the fixing part 2100. The groove of the fixing part 2100 is embedded and installed in the upper end of the outer cylinder 121.

[0107] The head motor 2130 is installed at the upper end of the fixed part 2100. The motor 2130 imparts a rotational force to the main body 2200. The main body 2200 is in a bar shape, passes through the center of the fixed part 2100 and extends in a direction perpendicular to the radial direction. One side of the main body 2200 is connected to the head motor 2130 of the fixed part 2100. The main body 2200 can be rotated in the inner cylinder 123 with the length direction as the axis by the drive of the head motor 2130.

[0108] The upper portion of the main body 2200 is located at the upper end of the fixing portion 2100, and the lower portion of the main body 2200 is located at the lower end of the fixing portion 2100. The upper portion of the main body 2200 can be folded at 90 degrees relative to the lower portion. When the upper portion and the lower portion of the main body 2200 are unfolded to a straight line, the length will be longer, so it is difficult to recycle the device after welding. After welding, the overall length of the device can be shortened by folding the upper portion of the main body 2200.

[0109] The main body 2200 is provided with a feeding motor 2210 and a wire mounting portion 2230 .

[0110] The feeding motor 2210 is installed on the upper part of the main body 2200. The feeding motor 2210 moves up and down along the upper part of the main body 2200. One end of the feeding motor 2210 is connected to the upper end of the welding part 2300, and by means of the up and down movement of the feeding motor 2210, the welding part 2300 can be slid up and down relative to the main body 2200.

[0111] The wire installation part 2230 is installed at the upper end of the upper part of the main body 2200. A welding material wire is installed in the wire installation part 2230, so that the wire is supplied to the welding part. The welding part 2300 is connected to the side of the main body 2200 in a slidable manner. The welding part 2300 can slide on the main body 2200 in the length direction of the main body 2200 by means of the feeding motor 2210. By means of the sliding movement of the welding part 2300, the welding height of the welding device 1000 can be adjusted.

[0112] A welding torch 2310 and a welding material supply assembly 2320 are installed at the lower end of the welding portion 2300. The electrode of the welding torch 2310 may be tungsten. The welding torch 2310 may receive a supply of gas such as argon from a gas nozzle. The welding torch 2310 is arranged in the radial direction of the inner cylinder 123 so that the head faces the inner wall of the inner cylinder 123. In order to adjust the distance between the inner wall of the inner cylinder 123 and the welding torch 2310, the welding torch 2310 may slide and move in the radial direction of the cylinder.

[0113] A welding material supply assembly 2320 is arranged adjacent to the welding torch 2310. The welding material supply assembly 2320 is used to draw welding material from the welding material nozzle. The welding material can be introduced into the molten pool of the base material during welding. In order to accurately introduce the welding material into the molten pool of the base material, the welding material supply assembly 2320 can rotate at a certain interval based on the installed shaft. The welding material supply assembly 2320 can adjust the introduction angle of the welding material during the rotation. In this way, the welding material supply assembly 2320 can prevent unspecified interference during the welding operation.

[0114] At least one camera 2330 may be installed at the lower end of the welding part 2300. The camera 2330 may be at least one of a welding observation camera and a welding bead observation camera. The welding observation camera may be installed between the welding torch 2310 and the welding material supply assembly 2320. During welding, cracks or uneven welding defects occurring at the welding part may be detected by taking real-time photos near the welding. The welding observation camera may send the location and size of the defective part to the control part of the welding device. The control part may verify the soundness of the welding in real time through the transmitted image. The welding observation camera may adjust the focal distance when necessary by moving the lens horizontally.

[0115] The welding bead observation camera can confirm whether the welding state is good by observing the welding beads generated during the welding process. When welding defects are found through the welding observation camera and the welding bead observation camera, the welding torch 2310 can be moved to the corresponding position and welded again.

[0116] Next, the steps of welding the inner cylinder using the moisture separator welding device according to one embodiment of the present invention will be described.

[0117] When welding the inner cylinder 123, the upper end of the cut inner cylinder will be located below the upper end of the outer cylinder. Therefore, the replacement inner cylinder 123' is inserted into the outer cylinder and adjusted to a position where the lower end of the replacement inner cylinder 123' is aligned with the upper end of the inner cylinder 123. Fig.10 As shown in (a) of FIG. 1 , after the position of the replacement inner cylinder 123 ′ is determined, the welding device 2000 is inserted into the inner cylinder 123 ′, and the fixing portion 2100 of the welding device 2000 is fixed to the outer cylinder 121 .

[0118] Next, the welding part 2300 is slid downwardly toward the main body 2200 and moved to the welding position ( Fig.10 When the welding torch 2310 is moved to the same height as the welding position, the welding torch 2310 is moved by sliding horizontally to approach the interior of the inner cylinder 123 ( Fig.10 (c) in FIG. 2 ). With the help of the movement of the welding part 2300 in the vertical direction and the movement of the welding torch 2310 in the horizontal direction, the welding torch 2310 will approach the vicinity of the welding position.

[0119] After the position of the welding torch 2310 is determined, welding is started. During the welding process, the welding material supply assembly 2320 is rotated and the welding material is supplied. After the welding at the starting position is completed, the main body 2200 can be rotated so that the welding part 2300 moves in the circumferential direction on the inner side of the inner cylinder 123. While the welding torch 2310 moves in the circumferential direction on the inner wall of the inner cylinder 123, the connection part of the inner cylinder 123 and the replacement inner cylinder 123' is welded.

[0120] After the welding is completed, the welding part 2300 is slid to the upper end of the lower part of the main body 2200, so that the length of the main body 2200 and the welding part 2300 reaches the minimum length. Next, the welding device 1000 can be removed. Because the distance for removing the device can be ensured between the end of the welded outer cylinder 121 and the steam generator, it is not necessary to fold the entire main body 2200 of the welding device 2000 toward the fixing part 2100. After the length of the welding device is minimized by sliding the welding part 2300 to the uppermost end of the lower part of the main body 2200 and rotating the upper part of the main body 2200 toward the fixing part 2100, it can be removed from the inner cylinder 123.

[0121] Fig.11It is a schematic diagram illustrating the sequence of welding an outer cylinder and an inner cylinder using a moisture separator welding device according to an embodiment of the present invention.

[0122] The order of welding the outer cylinder and the inner cylinder is as follows.

[0123] Parts required for replacement are moved to the interior of the steam generator 100 through the walkway 160 .

[0124] like Fig.11 As shown in (a), the replacement outer cylinder 121' is arranged above the upper end of the cut outer cylinder 121. Due to the operating characteristics that require rapid welding operations, the welding device 1000 can be pre-installed on the upper end of the replacement outer cylinder. While the welding torch 1310 of the welding device 1000 is moved in a circumferential direction on the inner wall of the outer cylinder 121, the connection between the outer cylinder 121 and the replacement outer cylinder 121' is welded. Because the welding surface of the outer cylinder is located at a higher position than the inner cylinder, it will not be interfered with by the inner cylinder during welding. After welding is completed, the length of the welding device 1000 is minimized and removed.

[0125] Next, if Fig.11 As shown in (b) in the figure, the replacement inner cylinder 123' is allowed to enter the interior of the outer cylinder 121'. The position is adjusted to where the lower end of the replacement inner cylinder 123' contacts the upper end of the inner cylinder 123. After the position of the replacement inner cylinder 123' is determined, the welding device 2000 is allowed to enter the interior of the replacement inner cylinder 123', and the fixing portion 2100 of the welding device 2000 is fixed to the outer cylinder 121'. While the welding torch 2310 of the welding device 2000 is moved in a circumferential direction on the inner wall of the inner cylinder 123, the connection portion between the inner cylinder 123 and the replacement inner cylinder 123' is welded. After welding is completed, the length of the welding device 2000 is minimized and removed.

[0126] Next, if Fig.11As shown in (c) in the figure, the replacement outer cylinder 121" is arranged above the upper end of the outer cylinder 121' to be welded. Due to the working characteristics that require rapid welding operations, the welding device 1000 can also be pre-installed on the upper end of the replacement outer cylinder 121". While the welding torch 1310 of the welding device 1000 is moved in the circumferential direction on the inner wall of the outer cylinder 121", the connection between the outer cylinder 121' and the replacement outer cylinder 121" is welded. Because the welding surface of the outer cylinder 121' is located at a position higher than the inner cylinder 123', it will not be interfered by the inner cylinder 123' during welding. After completing the welding of the second outer cylinder, the distance between the outer cylinder 121 and the steam dryer 130 will be reduced to about 15 cm. Therefore, it is difficult to remove the welding device 1000 in the unfolded state. After the welding part of the welding device 1000 is slid to the upper end of the main body and folded toward the fixing part to minimize the length of the entire device, it is removed from the outer cylinder.

[0127] 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.

[0128] 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 more. 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 conditions can be issued through a light bulb or the like. A sensor or a warning component can also be installed in the welding device.

[0129] The present invention performs welding work on the cylinder by inserting the device into the interior of the cylinder. Since the welding work is performed through the internal space of the cylinder, the welding work can be effectively performed in a narrow space. In addition, since the cylinder is welded inside the cylinder, the phenomenon of dust generated during welding 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.

[0130] 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.

[0131] 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 welding device, characterized in that: include: The fixing portion is formed in an annular shape, is equipped with at least one fixing guide and at least one fixing bracket at the lower end, and is equipped with a guide rail at the inner side; A main body, one end of which is mounted on the guide rail in a manner that it can move along the guide rail and extends perpendicularly to the radius direction of the fixing portion; as well as, The welding part is connected to the main body in a manner that it can slide along the length direction of the main body and is equipped with a welding torch and a welding material supply assembly.

2. The moisture separator welding device according to claim 1, characterized in that: The main body is provided with a link that rotates relative to the fixing portion.

3. The moisture separator welding device according to claim 1 or claim 2, characterized in that: The welding part is also equipped with a camera.

4. The moisture separator welding device according to claim 1 or claim 2, characterized in that: The main body moves in a circumferential direction along the guide track.

5. The moisture separator welding device according to claim 1 or claim 2, characterized in that: The welding torch is mounted on an end portion of the welding portion so as to be movable in a horizontal direction.

6. The moisture separator welding device according to claim 1 or claim 2, characterized in that: The welding repair material supply assembly rotates on a side of the welding portion.

7. The moisture separator welding device according to claim 1 or claim 2, characterized in that: The electrode of the welding torch is tungsten.

8. The moisture separator welding device according to claim 1 or claim 2, characterized in that: The fixing portion is provided with a folding member, A folding shaft is provided on one side of the main body. When the main body rotates, one end of the folding shaft passes through the opening of the folding member.

9. A moisture separator welding device, characterized in that: include: The fixing part is formed in a disc shape, equipped with at least one fixing guide and at least one fixing bracket at the lower end, and a motor is installed at the center; A main body, one end of which is connected to the motor of the fixed part, extending perpendicularly to the radial direction of the fixed part, and rotating with the aid of the motor; and The welding part is connected to the main body in a manner that it can move along the length direction of the main body, and a welding torch and a welding material supply assembly are installed at the lower end.

10. The moisture separator welding device according to claim 9, characterized in that: The welding torch is mounted on an end portion of the welding portion so as to be movable in a horizontal direction.

11. The moisture separator welding device according to claim 9 or claim 10, characterized in that: The welding part is also equipped with a camera.

12. The moisture separator welding device according to claim 9 or claim 10, characterized in that: The welding repair material supply assembly rotates on a side of the welding portion.

13. The moisture separator welding device according to claim 9 or claim 10, characterized in that: The electrode of the welding torch is tungsten.

14. A moisture separator welding method, characterized in that: A method for welding an outer cylinder of a moisture separator using a moisture separator welding device including a fixing portion, a main body portion and a welding portion includes: The step of disposing the moisture separator welding device at the upper end of the outer cylinder in a state of being installed on the replacement outer cylinder; The step of welding the connection portion between the outer cylinder and the replacement outer cylinder while the welding unit rotates inside the outer cylinder; After welding is completed, the welding portion is slidably moved to the upper end of the main body; A step of folding the main body by rotating a folding member on the fixing portion; and The step of removing the moisture separator welding device from the outer cylinder.

15. The moisture separator welding method according to claim 14, characterized in that: Also includes: After the step of welding the connection portion between the outer cylinder and the replacement outer cylinder is performed, the step of sucking in dust is performed.

16. The moisture separator welding method according to claim 14, characterized in that: The oxygen concentration is measured, and a warning sound is emitted when the oxygen concentration value is below a specific value.

17. The moisture separator welding method according to claim 14, characterized in that: 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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