A sealed weld cutting device and method

Abstract

The application provides a sealed weld cutting device and method, which comprises a base, a rotary driving assembly arranged on the base, a cutting mechanism, a connecting assembly, a positioning adjusting assembly for adjusting the cutting position, and a control assembly, the rotary driving assembly is drivingly connected with the cutting mechanism through the connecting assembly, the positioning adjusting assembly comprises an axial positioning assembly and a radial positioning assembly, the axial positioning assembly is arranged on the base and connected with the connecting assembly, the radial positioning assembly is arranged in the cutting mechanism, and the axial positioning assembly and the radial positioning assembly are both in communication connection with the control assembly.In the application, the base, the rotary driving assembly, the cutting mechanism, the connecting assembly and the positioning adjusting assembly are arranged, the cutting position is aligned with the sealed weld through the positioning adjusting assembly, and the remote control is realized through the control assembly, so that the problems of narrow space, high radiation and unreachable personnel in the nuclear reactor are solved, and the remote control and the accurate alignment of the cutting position are realized.

Description

Technical Field

[0001] This invention relates to the field of weld seam cutting equipment, and in particular to a sealing weld seam cutting device and method. Background Technology

[0002] The control rod drive mechanism (CRDM) is a servo mechanism of the reactor control and safety protection system. Its function is to drive the control rod assembly to move up and down within the reactor core according to commands from the reactor control and protection system, maintaining the control rod assembly at the commanded height or lowering it upon power failure. This enables reactor startup, power regulation, power maintenance, safe shutdown, and accident shutdown. Its safety and reliability directly affect the safety and operation of the reactor. Multiple control rod drive mechanisms are distributed on the reactor pressure vessel top cover. To achieve connection with the reactor top cover and other components, the control rod drive mechanism has multiple sealing welds (canpoys) from bottom to top, which vary depending on the reactor type. These sealing welds primarily serve a sealing function, and no leakage is permitted throughout their entire lifespan.

[0003] As nuclear power units increasingly participate in grid power regulation, the lifespan of control rod drive mechanism components has significantly improved compared to the past. However, some units still require replacement once their lifespan is exhausted. Figure 2 , Figure 3 In the view shown, the control rod drive mechanism 1 has a travel sleeve 101 and a top cover through-piece 2. The travel sleeve 101 and the top cover through-piece 2 are connected by threads. A connecting sleeve 102 is integrally provided on the body of the travel sleeve 101, and the outer wall of the connecting sleeve 102 is provided with threads. To prevent the primary circuit coolant inside the travel sleeve 101 from leaking out through the threads, an Ω-shaped sealing weld 107 is designed around the threaded engagement. This sealing weld 107 is a hollow, annular, transverse weld. When replacing the control rod drive mechanism 1, this sealing weld 107 needs to be cut. Since the top cover through-piece 2 cannot be replaced, the height of the top cover through-piece 2 must be ensured during cutting. Figure 3 The dimension H in the middle. If the travel sleeve 101 is to be reused, a corresponding beveling must be made during cutting. At the same time, the excess weld height on the back of the sealing weld 107 of the top cover through-piece 2 also needs to be repaired. Figure 1 In the top view shown, each control rod drive mechanism 1 is surrounded by almost four other control rod drive mechanisms 1. During in-service maintenance, due to space interference and extremely small size, personnel cannot access the area. Therefore, a remotely controlled sealing weld cutting device needs to be designed. Furthermore, the shape of the cutting device and its outer envelope trajectory 103 during movement are limited by the tangent circles of the four surrounding control rod drive mechanisms 1. Figure 1 As shown by the dashed line.

[0004] Currently, domestic equipment for sealing weld treatment mainly focuses on weld overlay repair after sealing weld leakage. There is almost no equipment for cutting sealing welds when replacing control rod drive mechanisms. At the same time, the development of sealing weld cutting equipment for replacing control rod drive mechanisms in reactors is slow due to problems such as limited space and inaccessibility for personnel when replacing control rod drive mechanisms, as well as high radiation doses in high-level radioactive areas. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a sealing weld cutting device and method that can be remotely operated and has a precise cutting position, which solves the problems of limited space and inaccessibility for personnel when replacing the control rod drive mechanism in service, as well as the high radiation dose in high-radiation areas.

[0006] To achieve the above and other related objectives, the present invention provides a sealing weld cutting device, comprising a base, a rotary drive assembly, a cutting mechanism, a connecting assembly, a positioning adjustment assembly, and a control assembly; the rotary drive assembly is disposed on the base, and the rotary drive assembly and the cutting mechanism are connected via the connecting assembly; the positioning adjustment assembly is used to adjust the cutting position, and includes an axial positioning assembly and a radial positioning assembly; the axial positioning assembly is disposed on the base and connected to the connecting assembly, and is used to control the cutting position axially; the radial positioning assembly is disposed in the cutting mechanism, and is used to control the cutting position radially; both the axial positioning assembly and the radial positioning assembly are communicatively connected to the control assembly.

[0007] Preferably, the connecting assembly includes an inner ring, an outer ring, and a rotating bushing. The rotating bushing is connected to the outer ring via a bearing. The inner ring is fitted inside the rotating bushing. One end of the rotating bushing is connected to a rotating drive assembly, and the other end is fixedly connected to a cutting mechanism. The outer ring is connected to an axial positioning assembly. Several positioning guide posts are provided between the base and the outer ring.

[0008] Preferably, the base is further provided with a clamping assembly, which includes a clamping motor, a conical pressure sleeve, and locking expansion blocks. A first lead screw is fixed on the motor shaft of the clamping motor, and a first threaded hole is opened on the conical pressure sleeve. The first lead screw is connected to the first threaded hole. A clamping guide post is connected between the base and the conical pressure sleeve. The conical pressure sleeve is disposed in the inner ring and moves along the clamping guide post. The locking expansion blocks are disposed on the inner wall of the conical pressure sleeve, and a compression spring is also provided between the locking expansion blocks. The control terminal of the clamping motor is communicatively connected to the control assembly.

[0009] Preferably, the rotary drive assembly includes a rotary drive motor, a driving gear fixed on the motor shaft of the rotary drive motor, and a driven gear fixed on a rotary bushing, wherein the rotary drive assembly is meshed with the gear on the rotary bushing; the axial positioning assembly includes an axial drive motor and a second lead screw fixed on the motor shaft of the axial drive motor, wherein a second threaded hole is provided on the outer ring, and the second lead screw is threadedly connected to the second threaded hole; the control terminal of the rotary drive motor and the control terminal of the axial drive motor are both communicatively connected to the control assembly.

[0010] Preferably, the cutting mechanism includes a cutter head, axial ranging modules all mounted on the cutter head, and several tool modules. The axial ranging modules are communicatively connected to the control component; the radial positioning component is driven by the cutter head.

[0011] Preferably, the tool module includes a cutting tool module and a beveling tool module, which are detachably connected to the tool disc.

[0012] Preferably, the cutter head is further provided with a trajectory scanning module, which is communicatively connected to the control component, and the cutter head is further provided with a plurality of video modules, which are communicatively connected to the control component.

[0013] Preferably, a lifting frame is also provided on the base.

[0014] Preferably, a limiting component is further provided between the base and the connecting component.

[0015] To achieve the above and other related objectives, the present invention also provides a method for cutting a sealing weld, comprising the following steps:

[0016] S1: Fix the base of the sealing weld cutting device to the outer circumference of the sealing weld to be cut;

[0017] S2: The axial positioning component is controlled by the control component to adjust the axial position of the cutting mechanism so that the cutting position of the cutting mechanism is at the same horizontal height as the sealing weld to be cut.

[0018] S3: Start the rotary drive assembly. The rotary drive assembly drives the cutting mechanism to rotate, and the cutting mechanism cuts the sealing weld to be cut.

[0019] S4: During the cutting process of the sealing weld, the radial positioning component is controlled by the control component, and the radial positioning component controls the cutting position so that the cutting mechanism is always in contact with the sealing weld to be cut.

[0020] S5: After the sealing weld has been cut through, remove the sealing weld cutting device.

[0021] As described above, the sealing weld cutting device and method of the present invention have the following beneficial effects:

[0022] The sealing weld cutting device and its usage method disclosed in this invention include a base, a rotary drive assembly, and a cutting mechanism. The rotary drive assembly drives the cutting mechanism to cut the sealing weld. A connecting assembly and a positioning adjustment assembly are also provided. Through axial and radial adjustment of the positioning adjustment assembly, the cutting position of the cutting mechanism is precisely aligned with the sealing weld. At the same time, the rotary drive assembly and the positioning adjustment assembly are remotely controlled by a control assembly. This avoids the problems of confined space, high radiation, and inaccessibility of personnel at nuclear reactors. Personnel can remotely control the device and achieve precise control of the cutting position. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the layout of the control rod drive mechanism of the sealing weld cutting device of the present invention;

[0024] Figure 2 This is a cross-sectional view along the central axis of the control rod drive mechanism of the sealing weld cutting device of the present invention;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a spatial structural diagram of the sealing weld cutting device of the present invention;

[0027] Figure 5 This is a cross-sectional view of the clamping assembly of the sealing weld cutting device of the present invention;

[0028] Figure 6 This is a cross-sectional view of the rotary drive assembly of the sealing weld cutting device of the present invention;

[0029] Figure 7 This is a cross-sectional view of the axial positioning component of the sealing weld cutting device of the present invention;

[0030] Figure 8 This is a structural diagram of the cutting mechanism of the sealing weld cutting device of the present invention;

[0031] Figure 9 This is a schematic diagram illustrating the working process of the sealing weld cutting device of the present invention.

[0032] Explanation of reference numerals in the attached figures

[0033] 1. Control rod drive mechanism; 101. Stroke sleeve; 102. Connecting sleeve; 103. Outer envelope dimension trajectory; 104. Clamping surface; 105. Load-bearing surface; 106. Reference positioning surface; 107. Sealing weld; 2. Top cover through-piece; 3. Base; 301. Positioning guide post; 302. Limiting assembly; 303. Limiting block; 4. Lifting frame; 5. Clamping assembly; 501. Clamping motor; 502. First lead screw; 503. Clamping guide post; 504. Conical pressure sleeve; 505. Locking expansion block; 506. Compression spring; 6. Rotary drive assembly; 601. Rotary drive motor; 602. Drive gear; 603. Rotary bushing; 604. Bearing; 7. Axial positioning assembly; 701. Axial drive motor; 702. Second lead screw; 8. Connecting assembly; 801. Outer ring; 802. Inner ring; 9. Cutting mechanism; 901. Cutter head; 902. Axial distance measuring module; 903. Beveling tool module; 904. Video module; 905. Cutting tool module; 906. Track scanning module; 907. Radial positioning assembly; 908. Slide rail. Detailed Implementation

[0034] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0035] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0036] like Figure 1 , Figure 2 , Figure 3 As shown, this invention provides a sealing weld cutting device, mainly used in the control rod drive mechanism 1 for cutting the sealing weld 107. Figure 1As shown, the control rod drive mechanism 1 mainly includes a top cover through-piece 2, a stroke sleeve 101, and a connecting sleeve 102 integrally formed with the stroke sleeve 101. The connecting sleeve 102 has external threads on its outer wall, and the top cover through-piece 2 has internal threads on its inner top wall. The top cover through-piece 2 and the connecting sleeve 102 are connected by threads. To prevent coolant leakage through the threads, the threaded connection is welded to form a sealing weld 107. For ease of description, as... Figure 2 , Figure 3 As shown, the outer wall of the travel sleeve 101 is defined as the clamping surface 104, the top surface of the connecting sleeve 102 is defined as the load-bearing surface 105, and the top surface of the top cover through part 2 is defined as the reference positioning surface 106.

[0037] like Figure 4 As shown, the present invention provides a sealing weld cutting device (hereinafter referred to as the cutting device), including a base 3, a rotary drive assembly 6, a cutting mechanism 9, a connecting assembly 8, a positioning adjustment assembly for adjusting the cutting position, and a control assembly. The rotary drive assembly 6 is fastened to the base 3 by screws. The rotary drive assembly 6 and the cutting mechanism 9 are connected by transmission through the connecting assembly 8. The positioning adjustment assembly includes an axial positioning assembly 7 and a radial positioning assembly 907. The axial positioning assembly 7 is fastened to the base 3 by screws and is connected to the connecting assembly 8. The connecting assembly 8 has both rotation and axial movement functions. The radial positioning assembly 907 is fastened to the cutting mechanism 9 by screws. Both the axial positioning assembly 7 and the radial positioning assembly 907 are communicatively connected to the control assembly.

[0038] The sealing weld cutting device of the present invention is used such that the base 3 of the cutting device is fixed on the outer circumferential side of the sealing weld 107 to be cut. The connecting component 8 has both rotation and axial movement functions. The connecting component 8 is connected to the cutting mechanism 9 and the axial positioning component 7 respectively. The operator controls the axial positioning component 7 to control the axial position of the connecting component 8, so that the cutting surface of the cutting mechanism 9 is on the same horizontal plane as the sealing weld 107. The rotation drive component 6 drives the cutting mechanism 9 to rotate through the rotation function of the connecting component 8. The operator adjusts the cutting position through the radial positioning component 907 so that the cutting mechanism is always in contact with the sealing weld 107, thereby completing the cutting of the sealing weld 107.

[0039] The sealing weld cutting device of the present invention controls the working state of the positioning adjustment component through the control component, which can achieve the purpose of remote control and solves the technical problems of limited space and inaccessibility for personnel when replacing the control rod drive mechanism 1 in service and high radiation dose in high-radiation areas. The positioning adjustment component includes an axial positioning component 7 and a radial positioning component 907, which can adjust the cutting position in a timely manner according to the cutting state and accurately control the cutting position of the sealing weld 107.

[0040] Preferred, such as Figure 4 , Figure 6 As shown, Figure 6 For along Figure 4 A cross-sectional view of the axis of the rotary drive motor 601. The connecting assembly 8 includes an inner ring 802, an outer ring 801, and a rotating bushing 603. The rotating bushing 603 and the outer ring 801 are rotatably connected via a bearing 604. The inner ring 802 is fitted inside the rotating bushing 603. The top end of the rotating bushing 603 is connected to the rotary drive assembly 6, and the bottom end is fastened to the cutting mechanism 9 with screws. The outer ring 801 is connected to the axial positioning assembly 7. Several positioning guide posts 301 are provided between the base 3 and the outer ring 801, serving as both connections and guides. In this embodiment, the rotating bushing 603 and the rotary drive assembly 6 are driven by gear meshing. There are three positioning guide posts 301, and the angular distance between the three positioning guide posts 301 is 120°. Furthermore, the cables and signal lines of the cutting mechanism 9, including the tool module, video module 904, axial ranging module 902, and trajectory scanning module 906, are rationally arranged and secured within the inner ring 802. Each cable and signal line is then connected to the integrated signal transmitting component via quick-connect connectors. When each module in the cutting mechanism 9 rotates, the cables, signal lines, and signal transmitting component all rotate synchronously on the inner ring 802, solving the problem of cable entanglement during rotation and ensuring continuous cutting. The signal transmitting component transmits the signals detected by each module to the control component, facilitating remote control of the welding device by the operator.

[0041] Preferred, such as Figure 4 , Figure 5 As shown, Figure 5 For along Figure 4A cross-sectional view of the axis of the clamping motor 501. A clamping assembly 5 is also fastened to the base 3 by screws. The clamping assembly 5 includes a clamping motor 501, a tapered pressure sleeve 504, and locking expansion blocks 505. A first lead screw 502 is mounted on the motor shaft of the clamping motor 501. A first threaded hole is provided on the tapered pressure sleeve 504, and the first lead screw 502 is connected to the first threaded hole. A clamping guide post 503 connects the base 3 and the tapered pressure sleeve 504. The tapered pressure sleeve 504 is disposed in the inner ring 802 and moves along the clamping guide post 503. Locking expansion blocks 505 are disposed on the inner wall of the tapered pressure sleeve 504, and compression springs 506 are also provided between the locking expansion blocks 505. The control end of the clamping motor 501 is communicatively connected to the control assembly. Further, in this embodiment, there are three locking expansion blocks 505, specifically similar to the structure of a lathe clamping seat, and the angular distance between the locking expansion blocks 505 is 120°. The clamping motor 501 rotates, driving the first lead screw 502 to rotate. Under the action of force, the conical pressure sleeve 504 moves along the clamping guide post 503. The bottom diameter of the conical pressure sleeve 504 is smaller than the top diameter. When moving downward, the locking expansion block 505 on the inner wall of the bottom end of the conical pressure sleeve 504 clamps the outer wall of the travel sleeve 101, that is, the locking expansion block 505 is tightly attached to the outer wall of the travel sleeve 101. Figure 2 The clamping surface 104 in the middle; the bottom end face of the tapered pressure sleeve 504 just abuts against the top surface of the connecting sleeve 102, that is Figure 2 The load-bearing surface 105. When the clamping motor 501 rotates in the reverse direction, the conical pressure sleeve 504 moves upward, and under the elastic force of the pressure spring 506, the locking expansion block 505 disengages from the clamping surface 104.

[0042] Preferred, such as Figure 4 As shown, the rotary drive assembly 6 includes a rotary drive motor 601, a driving gear 602 keyed and fixed to the motor shaft of the rotary drive motor 601, and a driven gear keyed and fixed to the rotary bushing 603. The rotary drive assembly 6 meshes with the gears of the rotary bushing 603, thereby driving the rotary bushing 603 to rotate. The axial positioning assembly 7 includes an axial drive motor 701 and a second lead screw 702 mounted on the motor shaft of the axial drive motor 701. A second threaded hole is provided on the outer ring 801, and the second lead screw 702 is threadedly connected to the second threaded hole. Figure 7 As shown, Figure 7 For along Figure 4A cross-sectional view of the axis of the axial drive motor 701 shows that when the axial drive motor 701 rotates, the second lead screw 702 is driven to rotate by the axial drive motor 701. Because the axial drive motor 701 is fixed on the base 3, the length of the second lead screw 702 is fixed, and the second lead screw 702 is connected to the outer ring 801 through a threaded hole, the outer ring 801 will move up and down along the positioning guide post 301 under the rotation of the second lead screw 702, thereby realizing the axial positioning of the cutting mechanism 9. The control terminals of the rotary drive motor 601 and the axial drive motor 701 are both communicatively connected to the control component. In this embodiment, under the action of the control component, the rotary drive motor 601 works, driving the drive gear 602 to rotate, thereby driving the rotation of the rotating bushing 603 according to the meshing of the gear. The cutting mechanism 9 rotates together with the rotating bushing 603, thereby cutting the sealing weld 107.

[0043] Preferred, such as Figure 8 As shown, the cutting mechanism 9 includes a cutter head 901, an axial ranging module 902 fastened to the cutter head 901 by screws, and several tool modules. The axial ranging module 902 is communicatively connected to the control component. The radial positioning component 907 is fastened to the inner wall of the cutting mechanism 9 by screws. A slide rail 908 is also provided on the inner wall of the cutting mechanism 9, and the cutter head 901 is slidably engaged with the slide rail 908 through a sliding groove. The radial positioning component 907 is drively connected to the cutter head 901 to move the cutter head 901 on the slide rail 908. The axial ranging module 902 uses laser ranging to indirectly measure the height of the tool modules from the reference positioning surface 106 and feeds this height back to the control component. This allows for precise adjustment by adjusting the axial positioning component 902 to ensure the cutter head moves on the slide rail 908. Figure 3 The dimension H is specified in the text. In this embodiment, the radial positioning component 907 adopts a transmission method similar to that of the axial positioning component 7, the clamping motor 501, and the tapered pressure sleeve 504. Specifically, the radial drive motor drives the lead screw to rotate, and the lead screw is threadedly connected to the cutter head 901. The cutter head 901 moves on the slide rail 908, thereby adjusting its position so that the cutter module on the cutter head 901 cuts the sealing weld 107. In other embodiments, the lead screw transmission method used by the radial positioning component 907, the axial positioning component 7, and the clamping component 5 can be implemented through the cooperation of slides, sliders, pneumatic methods, etc. Furthermore, in this embodiment, the cutter head 901 is arc-shaped, there are two of them, and they are symmetrically distributed relative to the centerline axis of the cutting mechanism 9. The cutter module is located on the centerline of the cutter head 901.

[0044] Furthermore, in this embodiment, the cutting tool module includes a cutting tool module 905 and a beveling tool module 903, which are detachably connected to the cutter head 901. Both the cutting tool module 905 and the beveling tool module 903 are customized according to the structure and dimensions of the sealing weld 107 to be cut. The cutting tool module 905 and the beveling tool module 903 are symmetrically distributed around the center point of the cutting mechanism 9, enabling simultaneous cutting and beveling of the sealing weld 107. Replacing the cutting tool module 905 or the beveling tool module 903 with a back-digging cutter allows for the removal of excess back height of the sealing weld 107. In this embodiment, the cutting tool module 905 is used to cut the sealing weld, and the beveling tool module 903 is used to bevele the travel sleeve 101, facilitating the replacement and reuse of the travel sleeve 101 after repair. The back-drilling tool is used to grind the weld seam on the outer periphery of the top cover through part 2, so as to avoid stress concentration at the weld seam after the replacement of the travel sleeve 101, which would affect the weld strength and the leak-proof strength.

[0045] Preferably, such as Figure 8 As shown, the cutter head 901 is also equipped with a trajectory scanning module 906, which is communicatively connected to the control component. The trajectory scanning module 906 is used to perform a circumferential scan of the weld reinforcement before cutting, thereby calculating the radial feed distance of the tool module. The cutter head 901 is also equipped with several video modules 904, which are communicatively connected to the control component. The video modules 904 are used to monitor the status of the tool modules and the processing quality. In this embodiment, there are two video modules 904, two radial positioning components 907, and two cutter heads 901. The two radial positioning components 907 correspond to two tool modules respectively, enabling independent control of the radial feed distance of different functional tool modules.

[0046] Preferred, such as Figure 4 , Figure 9 As shown, a lifting frame 4 is also provided on the base 3. The lifting frame 4 includes a top cover and several support rods connecting the top cover and the base 3. Several lifting rings are also provided on the top cover to facilitate the hoisting of the cutting device onto the stroke sleeve 101 of the control rod drive mechanism 1. In this embodiment, the top cover, base 3, connecting assembly 8, and cutting mechanism 9 all have through holes of the same specification on the same vertical axis so that the cutting device can be fitted onto the outer circumferential side of the stroke sleeve 101. In this embodiment, the diameter of the top cover and the base 3 is not greater than [missing information]. Figure 1 The outer envelope dimension trajectory 103 is arranged so that the cutting device can be placed onto the stroke sleeve 101 of the control rod drive mechanism 1.

[0047] Preferred, such as Figure 4As shown, a limiting component 302 is also provided between the base 3 and the connecting component 8. In this embodiment, the limiting component 302 includes an upper part fixed to the bottom surface of the base 3 and a lower part fixed to the top surface of the outer ring 801. A limiting block 303 is provided between the upper and lower parts of the limiting component 302, which can limit the distance between the connecting component 8 and the base 3, and prevent accidental damage to the workpiece surface of the cutting mechanism 9 and the control rod drive mechanism 1. In this embodiment, when the outer ring 801 moves downward under the combined action of the axial drive motor 701, the second lead screw 702, and the threaded hole, the inner ring 802 also moves downward, that is, the driven gear moves downward relative to the driving gear 602. However, the axial movement distance is between 1-3 mm, which will not cause problems with gear meshing.

[0048] Furthermore, in this embodiment, the axial positioning component 7 and the radial positioning component 907 are also connected to a rotary encoder. The rotary encoder corresponds the rotation angle of the axial drive motor 701 and the radial positioning component 907 to the displacement of the cutting mechanism 9 in the axial and radial directions, thereby achieving precise control.

[0049] This invention also relates to a method for cutting a sealing weld, which overcomes the technical problems in the prior art, comprising the following steps:

[0050] A1: The cutting device is mounted from top to bottom on the outer periphery of the stroke sleeve 101 of the control rod drive mechanism 1 to be cut, using the lifting frame 4 and lifting equipment;

[0051] A2: The clamping assembly 5 is controlled by the control component. The clamping motor 501 drives the first lead screw 502 to rotate, thereby controlling the descent of the conical pressure sleeve 504. As a result, the locking expansion block 505 on the inner wall of the conical pressure sleeve 504 clamps onto the outer wall of the travel sleeve 101, i.e., the clamping surface 104. The bottom end face of the locking expansion block 505 is clamped onto the top surface of the connecting sleeve 102, i.e., the load-bearing surface 105.

[0052] A3: The axial ranging module 902 on the cutting mechanism 9 emits a laser to measure the height difference between the cutting mechanism 9 and the reference positioning surface 106 and feeds the result back to the control component. The control component receives the feedback signal and controls the axial positioning component 7 to work.

[0053] A4: The axial positioning component 7 receives a signal from the control component, and the axial drive motor 701 drives the second lead screw 702 to rotate. This, in turn, causes the outer ring 801 to move up and down along the positioning guide post 301, until the height difference between the cutting mechanism 9 and the reference positioning surface 106 is equal to the target height. Figure 3 The height of H is the same in the middle;

[0054] A5: The trajectory scanning module 906 is controlled by the control component. The trajectory scanning module 906 is used to perform circumferential scanning on the excess height of the sealing weld 107 and feed the detection results back to the control component. The control component receives the feedback signal and calculates the radial feed distance of the cutting tool module 905 and the beveling tool module 903 in combination with the design drawings of the sealing weld 107.

[0055] A6: The rotary drive assembly 6 is controlled by the control component. The rotary drive motor 601 drives the rotary bushing 603 to rotate through gear meshing. At the same time, the control component starts the radial drive motors of the cutting tool module 905 and the beveling tool module 903 respectively. According to the rotary encoder, the rotation angle of the radial drive motor is matched with the radial displacement, and the radial distance of the cutting tool module 905 and the beveling tool module 903 is precisely controlled to realize the cutting of the sealing weld 107 and the beveling.

[0056] A7: The video module 904 monitors the working device of the tool module and the cutting quality of the sealing weld 107 throughout the cutting process, and feeds the monitoring results back to the control component.

[0057] A8: After the sealing weld 107 is completely cut, the clamping assembly 5 is controlled by the control assembly. The clamping motor 501 drives the first lead screw 502 to rotate, thereby controlling the rise of the conical pressure sleeve 504. The locking expansion block 505 on the inner wall of the conical pressure sleeve 504 is disengaged from the outer wall of the travel sleeve 101 under the elastic force of the compression spring 506. The cutting device is then lifted out by the hoisting frame 4 using hoisting equipment.

[0058] The sealing weld cutting device of the present invention, in use, firstly, uses a lifting frame 4 to place the cutting device on the outer periphery of the travel sleeve 101 to be cut; the clamping motor 501 is activated by the control component, the clamping motor 501 drives the first lead screw 502 to rotate and press the conical pressure sleeve 504 downward, the locking expansion block 505 on the inner wall of the conical pressure sleeve 504 clamps the outer wall of the travel sleeve 101, and the bottom end face of the locking expansion block 505 clamps the top surface of the connecting sleeve 102; then, the axial distance measuring module 902 emits a laser to detect the height difference between the cutting device and the reference positioning surface 106 and feeds the result back to the control component, the control component processes the information and precisely controls the rotation angle of the axial drive motor 701 through a rotary encoder, the rotation of the axial drive motor 701 drives the second lead screw 702 to rotate, the outer ring 801 moves up and down along the positioning guide post 301 until the height difference between the cutting mechanism 9 and the reference positioning surface 106 is equal to the height difference between the cutting mechanism 9 and the reference positioning surface 106. Figure 3The height of H is the same. The rotary drive assembly 6 is activated by the control component. The rotary drive motor 601 works to drive the rotary bushing 603 to rotate through gear meshing. In turn, the cutting mechanism 9 fixed at the bottom of the rotary bushing 603 rotates. The cutter module inside the cutting mechanism 9 cuts the sealing weld 107. The rotation of the rotary bushing 603 drives the inner ring 802 to rotate, so that the cables between the components on the cutting mechanism 9 and the signal transmission assembly rotate simultaneously, avoiding the occurrence of components rotating while the cables do not move, and the cables getting tangled. During the rotation of the cutting mechanism 9, the trajectory scanning module 906 performs real-time circumferential scanning of the excess height of the sealing weld 107 and feeds the detection results back to the control component. The control component receives the feedback signal and compares it with the design drawings, controlling the radial drive motor to operate. The radial drive motor drives the lead screw to rotate, and the lead screw drives the cutter head 901 to move on the slide rail 908 through a threaded connection, so that the radial feed distance of the cutting tool module 905 and the beveling tool module 903 reaches the set distance. The cutting tool module 905 cuts until the sealing weld 107 is cut through, and the beveling tool module 903 opens the bevel, facilitating the replacement of the travel sleeve 101. The video module 904 monitors the working status of the tool modules and the cutting quality of the sealing weld 107 throughout the cutting process and feeds the monitoring results back to the control component. After the sealing weld 107 is completely cut, the clamping assembly 5 is controlled by the control component. The clamping motor 501 drives the first lead screw 502 to rotate, controlling the rise of the conical pressure sleeve 504. The locking expansion block 505 on the inner wall of the conical pressure sleeve 504 disengages from the clamping surface 104 and the load-bearing surface 105 under the elastic force of the compression spring 506. The cutting device is then lifted out using a hoisting equipment via the lifting frame 4. When it is necessary to replace the travel sleeve 101, the cutting tool module 905 and the beveling tool module 903 are replaced with a back-digging tool. The cutting device is then hoisted back in, and the above operation is repeated to remove the excess height of the weld on the outer periphery of the top cover through-part 2. Then, the new travel sleeve 101 is threadedly connected to the top cover through-part 2 via the connecting sleeve 102 and sealed by welding.

[0059] The sealing weld cutting device of this invention has a base 3 and a lifting frame 4 whose dimensions are strictly designed according to the spatial dimensions of the control rod drive mechanism 1, solving the problem of limited space and inaccessibility for personnel. It is equipped with a control component, enabling remote control and significantly reducing the radiation dose to workers during on-site cutting. The cutting mechanism 9 has two sets of tool modules, which can simultaneously cut the sealing weld 107 and create bevels. The tool modules are detachable and replaceable, allowing for the removal of excess height on the back of the sealing weld 107 as needed. It includes an axial ranging module 902 and a trajectory scanning module 906. The axial ranging module 902 uses laser detection to accurately position the tool modules in the height direction, while the trajectory scanning module 906 automatically generates a circular trajectory based on the scanning results. The control component automatically calculates the radial feed distances of the cutting tool module 905 and the beveling tool module 903, achieving high accuracy and automation. A connecting component 8, with a fixed outer ring 801 and a rotating inner ring 802, ensures that the cutting mechanism 9 rotates continuously at 360°, preventing cable entanglement.

[0060] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0061] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A sealed weld cutting device, characterized by: The application relates to a cutting device for a glass sheet, which comprises a base (3), a rotary driving assembly (6), a cutting mechanism (9), a connecting assembly (8), a positioning adjusting assembly and a control assembly; the rotary driving assembly (6) is arranged on the base (3) and is in transmission connection with the cutting mechanism (9) through the connecting assembly (8); the positioning adjusting assembly is used for adjusting the cutting position and comprises an axial positioning assembly (7) and a radial positioning assembly (907); the axial positioning assembly (7) is arranged on the base (3) and is connected with the connecting assembly (8) and is used for controlling the cutting position in the axial direction; the radial positioning assembly (907) is arranged in the cutting mechanism (9) and is used for controlling the cutting position in the radial direction; the axial positioning assembly (7) and the radial positioning assembly (907) are in communication connection with the control assembly. The connecting assembly (8) comprises an inner ring (802), an outer ring (801) and a rotary shaft sleeve (603); the rotary shaft sleeve (603) is connected with the outer ring (801) through a bearing (604); the inner ring (802) is sleeved in the rotary shaft sleeve (603); one end of the rotary shaft sleeve (603) is in transmission connection with the rotary driving assembly (6) and the other end is fixedly connected with the cutting mechanism (9); the outer ring (801) is in transmission connection with the axial positioning assembly (7); a plurality of positioning guide columns (301) are arranged between the base (3) and the outer ring (801). The cutting mechanism (9) comprises a cutter disc (901), an axial distance measuring module (902) and a plurality of cutter modules which are all arranged on the cutter disc (901); the axial distance measuring module (902) is in communication connection with the control assembly; the radial positioning assembly (907) is in transmission connection with the cutter disc (901); a track scanning module (906) is further arranged on the cutter disc (901); the track scanning module (906) is in communication connection with the control assembly; a plurality of video modules (904) are further arranged on the cutter disc (901); the video modules (904) are in communication connection with the control assembly. The cables, signal lines of the cutter modules, the video modules (904), the axial distance measuring module (902) and the track scanning module (906) in the cutting mechanism (9) are arranged in the inner ring (802) and then are respectively connected with the integrated signal transmitting assembly through quick connectors; when the modules in the cutting mechanism (9) rotate, the cables, signal lines and the signal transmitting assembly rotate synchronously on the inner ring (802).

2. The sealed weld cutting device of claim 1, wherein: The base (3) is further provided with a holding assembly (5), the holding assembly (5) comprises a holding motor (501), a conical pressing sleeve (504) and a locking expansion block (505), a first lead screw (502) is fixed on the motor shaft of the holding motor (501), a first threaded hole is formed in the conical pressing sleeve (504), and the first lead screw (502) is connected with the first threaded hole in a matched mode; a holding guide column (503) is connected between the base (3) and the conical pressing sleeve (504), the conical pressing sleeve (504) is arranged in the inner ring (802) and moves along the holding guide column (503), and the locking expansion block (505) is arranged on the inner wall of the conical pressing sleeve (504).

3. The sealed weld cutting device of claim 1, wherein: The rotating driving assembly (6) comprises a rotating driving motor (601), a driving gear (602) fixed on the motor shaft of the rotating driving motor (601) and a driven gear fixed on a rotating shaft sleeve (603), the rotating driving assembly (6) is connected with the rotating shaft sleeve (603) in a gear meshing mode; the axial positioning assembly (7) comprises an axial driving motor (701) and a second lead screw (702) fixed on the motor shaft of the axial driving motor (701), a second threaded hole is formed in the outer ring (801), and the second lead screw (702) is connected with the second threaded hole in a threaded mode; the control end of the rotating driving motor (601) and the control end of the axial driving motor (701) are connected with the control assembly in a communication mode.

4. The sealed weld cutting device of claim 1, wherein: The cutter module comprises a cutting cutter module (905) and a beveling cutter module (903), and the cutting cutter module (905) and the beveling cutter module (903) are detachably connected to the cutter disc (901).

5. The sealed weld cutting device of claim 1, wherein: The base (3) is further provided with a lifting frame (4).

6. The sealed weld cutting device of claim 1, wherein: The base (3) and the connecting assembly (8) are further provided with a limiting assembly (302).

7. A method of cutting a sealed weld using the sealed weld cutting device of any one of claims 1-6, characterized by: The method comprises the following steps: S1: fixing the base (3) of the sealing weld cutting device on the outer circumferential side of the sealing weld (107) to be cut; S2: controlling the axial positioning assembly (7) to work through the control assembly, driving and adjusting the axial position of the cutting mechanism (9) through the connecting assembly (8), so that the cutting position of the cutting mechanism (9) is at the same horizontal height as the sealing weld (107) to be cut; S3: starting the rotating driving assembly (6), driving the cutting mechanism (9) to rotate through the working of the rotating driving assembly (6), and cutting the sealing weld (107) to be cut through the cutting mechanism (9); S4: during the cutting of the sealing weld (107), controlling the radial positioning assembly (907) to work through the control assembly, controlling the cutting position, and making the cutting mechanism (9) always contact with the sealing weld (107) to be cut; S5: after the sealing weld (107) to be cut is cut through, the sealing weld cutting device is removed.

Images