welding equipment

Abstract

The present invention relates to a welding device for welding the seam between a compensating ring and a tube seat of a control rod drive mechanism. The welding device comprises a conveying mechanism, a clamping mechanism, and a welding mechanism. The conveying mechanism is configured to be mounted on the control rod drive mechanism, avoiding the compensating ring and the tube seat, and is movable along the axial direction of the control rod drive mechanism. The clamping mechanism is connected to the conveying mechanism and is configured to clamp the tube seat. The welding mechanism is connected to the clamping mechanism and is movable circumferentially along the tube seat, for welding the seam. This structure automates and facilitates welding between the compensating ring and the tube seat, while reducing radiation exposure to manual welding and the risk of unstable welding quality due to human factors.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, in particular to a welding device. Background Art

[0002] The control rod drive mechanism (CRDM) is a vertical, stepping magnetic lifting mechanism installed on the reactor pressure vessel head of a nuclear power plant. The CRDM socket directly contacts the lower portion of the thermowell flange. During nuclear power plant operation, water flow impact causes the lower portion of the thermowell to oscillate, resulting in vertical and circumferential movement of the entire thermowell. This leads to wear between the tapered surfaces of the lower portion of the thermowell flange and the CRDM socket.

[0003] To prevent the thermowell from breaking or eccentricity due to excessive wear, which could hinder the operation of the CRDM, a compensating ring must be added to the worn area of ​​the CRDM socket and secured to it by welding. Currently, this weld is made manually. However, due to the high radiation exposure dose of 35mSv / h at the CRDM socket, manual welding poses challenges in protecting personnel from radiation and requires high personnel qualifications. Furthermore, the welding quality is unstable and has a low pass rate. Furthermore, the compensating ring of the inner CRDM socket cannot be welded close to the socket, making it difficult to observe and positioning the welding torch. Summary of the Invention

[0004] Based on this, it is necessary to solve the problem of inconvenience in welding between the compensation ring and the tube seat of the control rod drive mechanism, and provide a welding device for welding the weld between the compensation ring and the tube seat of the control rod drive mechanism, the welding device comprising:

[0005] a transmission mechanism, configured to be sleeved on the control rod drive mechanism and arranged to avoid the compensation ring and the tube seat to be welded, wherein the transmission mechanism is capable of moving along the axial direction of the control rod drive mechanism;

[0006] a clamping mechanism connected to the conveying mechanism and used for clamping the tube seat;

[0007] The welding mechanism is connected to the clamping mechanism, and the welding mechanism can move along the circumference of the pipe seat, and is used to weld the weld.

[0008] This technical solution provides a welding device comprising a conveyor mechanism, a clamping mechanism, and a welding mechanism. The conveyor mechanism is used to transport the clamping mechanism and the welding mechanism to appropriate positions for welding corresponding welds. The conveyor mechanism utilizes the positional relationship between a control rod drive mechanism and another control rod drive mechanism. The conveyor mechanism is positioned over the control rod drive mechanism, avoiding the compensating ring and tube socket to be welded. The conveyor mechanism, when axially moving along the control rod drive mechanism, drives the clamping mechanism and the welding mechanism to move to the position of the compensating ring and tube socket to be welded. The clamping mechanism is connected to the conveyor mechanism so that it can move axially relative to the control rod drive mechanism with the conveyor mechanism, allowing the clamping mechanism to approach the tube socket to clamp and secure it. The welding mechanism is connected to the clamping mechanism. When the clamping mechanism clamps the tube socket to secure its position, it drives the welding mechanism to move circumferentially along the tube socket, enabling the welding mechanism to weld the weld between the compensating ring and the tube socket. Through the above structure, the clamping mechanism and the welding mechanism are transported to the appropriate position by the conveying mechanism, and the pipe seat is clamped and fixed by the clamping mechanism, and the welding mechanism welds the corresponding welds, which can realize the automation and convenience of welding between the compensation ring and the pipe seat, and at the same time reduce the radiation caused by manual welding, and reduce the risk of unstable welding quality due to human factors.

[0009] In some embodiments, the transmission mechanism comprises:

[0010] an annular base, configured to be sleeved on the control rod drive mechanism and connected to the clamping mechanism; and

[0011] A plurality of rollers are provided on the inner peripheral wall of the annular base and are spaced apart along the circumference of the annular base. Each of the rollers can abut against the control rod drive mechanism and can roll along the axis of the control rod drive mechanism.

[0012] In some embodiments, there are two annular bases, each of which is provided with a plurality of rollers, and the conveying mechanism further comprises:

[0013] a sleeve, the sleeve being used to be sleeved on the control rod drive mechanism;

[0014] The two annular bases are respectively fixedly connected to the two ends of the sleeve.

[0015] In some embodiments, the clamping mechanism comprises:

[0016] a connecting assembly, configured to be sleeved on the control rod drive mechanism, one end of the connecting assembly being configured to be connected to the transmission mechanism, the connecting assembly having a receiving cavity;

[0017] a plurality of clamping assemblies spaced apart along the circumference of the CRDM, each of the clamping assemblies being connected to the connecting assembly; and

[0018] a driving member disposed in the accommodating chamber, wherein the driving member and a portion of the wall of the accommodating chamber enclose a gas chamber, and gas in the gas chamber can exert a force on the driving member to move the driving member relative to the connecting assembly;

[0019] The driving member abuts against each of the clamping assemblies, and the clamping assemblies are linked with the driving member to drive each of the clamping assemblies to move toward the control rod drive mechanism to clamp the control rod drive mechanism.

[0020] In some embodiments, the connection assembly includes:

[0021] a connecting plate connected to the transmission mechanism;

[0022] an outer ring, one end of which is connected to the connecting plate;

[0023] The mounting plate is connected to one end of the outer ring away from the connecting plate, the connecting plate and the outer ring

[0024] The mounting plate encloses the accommodating cavity, and the mounting plate is provided with an air inlet hole communicating with the gas chamber.

[0025] In some embodiments, each of the clamping assemblies comprises:

[0026] a mounting block fixedly connected to the mounting plate;

[0027] a chuck movably connected to the mounting block, wherein one end of the chuck away from the mounting block is slidably connected to the connecting plate, and the chuck is capable of moving along the radial direction of the connecting plate; and

[0028] a resilient member, one end of which is connected to the clamp and the other end of which is connected to the connecting plate, the resilient member providing a resilient force for the clamp to move away from the control rod drive mechanism;

[0029] Wherein, the driving member includes a first guide sliding surface, the chuck includes a second guide sliding surface, the first guide sliding surface is in contact with the second guide sliding surface, and the first guide sliding surface and the second guide sliding surface are both inclined surfaces.

[0030] In some embodiments, the connecting plate includes a plurality of guide grooves, the plurality of guide grooves being arranged at intervals along the circumference of the connecting plate, and one end of each of the clamps being disposed in the guide groove; the clamping assembly further includes:

[0031] A limit plate is fixedly connected to the connecting plate and is blocked at the notch of the guide slot to limit one end of the clamp from being separated from the guide slot.

[0032] In some embodiments, the welding mechanism comprises:

[0033] a fixing seat connected to the clamping mechanism;

[0034] an adjusting assembly connected to the fixing seat; and

[0035] a welding gun connected to the adjustment assembly;

[0036] The adjustment assembly is used to adjust the position of the welding gun along the axial direction and the radial direction of the control rod drive mechanism.

[0037] In some embodiments, the adjustment component includes:

[0038] a first adjusting member connected to the fixing seat and capable of moving relative to the fixing seat along the axial direction of the CRDM; and

[0039] A second adjusting member, one end of which is connected to the first adjusting member, the other end of which is connected to the welding gun, and the second adjusting member can move relative to the first adjusting member along the radial direction of the control rod drive mechanism.

[0040] In some embodiments, the welding mechanism further includes a detection member fixedly connected to the adjustment assembly for detecting the position of the weld.

[0041] In some embodiments, the welding device further includes a walking mechanism, and the walking mechanism includes:

[0042] A fixed housing, fixedly connected to the clamping mechanism;

[0043] a rotary disk rotatably connected to the fixed housing and fixedly connected to the welding mechanism;

[0044] The driving assembly is fixedly connected to the rotary disk to drive the rotary disk to rotate relative to the fixed shell.

[0045] In some embodiments, the walking mechanism further includes a rotating ring gear, which is fixedly connected to the fixed housing; the driving assembly includes:

[0046] A motor mounting base, fixedly connected to the rotary disk;

[0047] a drive motor connected to the motor mounting base; and

[0048] A driving gear is fixedly connected to the motor shaft of the driving motor, and the driving gear is engaged with the rotating ring gear to drive the rotating disk to rotate relative to the fixed housing.

[0049] In some embodiments, the walking mechanism further includes a plurality of concentric shafts fixedly connected to the turntable, the plurality of concentric shafts being arranged at intervals along the circumference of the turntable, and the concentric shafts being in contact with the outer circumferential surface of the rotating gear ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic structural diagram of a welding device provided in one embodiment of the present application;

[0051] Figure 2 Front view of the transmission mechanism provided in one embodiment of the present application

[0052] Figure 3 for Figure 2 sectional view of

[0053] Figure 4 A schematic diagram of the transmission mechanism structure provided in one embodiment of the present application;

[0054] Figure 5 A schematic diagram of the structure of a clamping mechanism provided in one embodiment of the present application;

[0055] Figure 6 A schematic diagram of the welding mechanism structure provided in one embodiment of the present application;

[0056] Figure 7 A schematic diagram of the welding gun structure provided in one embodiment of the present application;

[0057] Figure 8 A schematic diagram of the walking mechanism structure provided in one embodiment of the present application;

[0058] Figure 9 A schematic diagram of the positions of the tube seat and compensation ring provided in one embodiment of the present application.

[0059] Reference numerals:

[0060] Conveying mechanism 10; annular base 101; roller 102; sleeve 103; clamping mechanism 20; connecting assembly 201; connecting plate 2011; outer ring 2012; mounting plate 2013; clamping assembly 202; mounting block 2021; chuck 2022; rebound member 2023; limit plate 2024; driving member 203; welding mechanism 30; fixing seat 301; adjusting mechanism 302; first adjusting member 3021; ​​second adjusting member 3022; welding gun 303; detecting member 304; walking mechanism 40; fixed shell 401; turntable 402; driving assembly 403; motor mounting seat 4031; driving motor 4032; driving gear 4033; rotating gear ring 404; concentric shaft 405; pipe seat 50; compensation ring 60. DETAILED DESCRIPTION

[0061] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0064] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0065] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0066] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0067] See Figures 1 to 9 , Figure 1 FIG2 shows a schematic structural diagram of a welding device according to an embodiment of the present invention. An embodiment of the present invention provides a welding device for welding a weld between a compensation ring 60 and a tube seat 50 of a control rod drive mechanism. The welding device includes a conveying mechanism 10, a clamping mechanism 20, and a welding mechanism 30. The conveying mechanism 10 is configured to be sleeved on the control rod drive mechanism and is movable in the axial direction of the control rod drive mechanism. The clamping mechanism 20 is connected to the conveying mechanism 10 and is configured to clamp the tube seat 50. The welding mechanism 30 is connected to the clamping mechanism 20 and is movable in the circumferential direction of the tube seat 50. The welding mechanism 30 is configured to weld the weld.

[0068] This technical solution provides a welding device comprising a conveyor mechanism 10, a clamping mechanism 20, and a welding mechanism 30. The conveyor mechanism 10 is used to transport the clamping mechanism 20 and the welding mechanism 30 to appropriate positions to facilitate welding of corresponding welds. The conveyor mechanism 10 utilizes the positional relationship between the CRDM to be welded and another CRDM. The conveyor mechanism 10 is positioned over the CRDM, avoiding the compensating ring 60 and the tube socket 50 to be welded. The conveyor mechanism 10 axially moves along the CRDM, driving the clamping mechanism 20 and the welding mechanism 30 to move to the position of the compensating ring 60 and the tube socket 50 to be welded. The clamping mechanism 20 is connected to the conveyor mechanism 10 so that it can move with the conveyor mechanism 10 and relative to the axial direction of the CRDM, allowing the clamping mechanism 20 to approach the tube socket 50 and clamp it to maintain its position. The welding mechanism 30 is connected to the clamping mechanism 20. When the clamping mechanism 20 clamps the tube socket 50 to secure its position, it drives the welding mechanism 30 to move circumferentially along the tube socket 50, enabling the welding mechanism 30 to weld the seam between the compensation ring 60 and the tube socket 50. With this structure, the conveying mechanism 10 transports the clamping mechanism 20 and the welding mechanism 30 to appropriate positions. The clamping mechanism 20 clamps and secures the tube socket 50, and the welding mechanism 30 welds the corresponding seams. This automates and facilitates the welding process between the compensation ring 60 and the tube socket 50, while also reducing radiation exposure to manual welding and the risk of unstable welding quality due to human factors.

[0069] In some embodiments, as Figure 1 As shown, the conveying mechanism 10 and the clamping mechanism 20 are connected by an L-shaped connecting bracket. The L-shaped bracket includes two mutually perpendicular first connecting rods and second connecting rods, wherein the first connecting rod is parallel to the extension direction of the control rod drive mechanism, and the second connecting rod is perpendicular to the first connecting rod. The conveying mechanism 10 is fixedly connected to the end of the first connecting rod away from the second connecting rod, and the clamping mechanism 20 is fixedly connected to the end of the second connecting rod away from the first connecting rod. Therefore, the conveying mechanism 10 can be mounted on the control rod drive mechanism and drive the clamping mechanism 20 to move toward the tube seat 50.

[0070] like Figures 2 to 4 As shown, the conveying mechanism 10 includes an annular base 101 and a plurality of rollers 102. The annular base 101 is used to be mounted on the control rod drive mechanism and connected to the clamping mechanism 20. The plurality of rollers 102 are arranged on the inner circumferential wall of the annular base 101 and are spaced apart along the circumference of the annular base 101. Each roller 102 is connected to the annular base 101. Each roller 102 can abut against the control rod drive mechanism and roll along the axis of the control rod drive mechanism.

[0071] The conveyor mechanism 10 is mounted on the CRAM pressure housing via an annular base 101, avoiding the compensation ring 60 and the tube seat 50 to be welded. A plurality of rollers 102 are spaced circumferentially around the annular base 101 and connected to its inner circumferential wall. When the annular base 101 is mounted on the CRAM pressure housing, the rollers 102 abut against the outer circumference of the pressure housing and roll axially along the CRAM. The rolling of the rollers 102 drives the annular base 101 to move axially relative to the CRAM, thereby driving the clamping mechanism 20. This allows the clamping mechanism 20, connected to the annular base 101, to move closer to the tube seat 50, thereby enabling the conveyor mechanism 10 to smoothly lower the clamping mechanism 20 and the welding mechanism 30.

[0072] like Figure 3 and Figure 4 As shown, there are two annular bases 101, each of which is provided with a plurality of rollers 102. The transmission mechanism 10 further includes a sleeve 103, which is used to be sleeved on the control rod drive mechanism; the two annular bases 101 are fixedly connected to the two ends of the sleeve 103 respectively.

[0073] Specifically, the outer edges of the two annular bases 101 are connected to the inner circumference of each end of the sleeve 103. Each annular base 101 is equipped with multiple spaced rollers 102. The rollers 102 are located on opposing sides of the annular bases 101, with portions of the rollers 102 protruding from the inner circumference of the annular bases 101. This ensures that rollers 102 are provided at both ends of the sleeve 103. When the sleeve 103 is mounted on the CRDM pressure hull, the rollers 102 abut against the circumference of the CRDM pressure hull, increasing the contact area between the rollers 102 and the CRDM pressure hull, thereby improving the transport stability of the transport mechanism 10. The rollers 102 enable the sleeve 103 to move relative to the CRDM pressure hull. The provision of two annular bases 101 and their connection to the sleeve 103 ensures the stability of the annular base 101 when moving relative to the CRDM pressure hull, enabling a smooth downward movement of the welding device.

[0074] In some embodiments, as Figure 3 As shown, the conveyor mechanism 10 comprises a sleeve 103, an annular base 101, a roller base, a roller shaft, spacers, and silicone rollers. The silicone rollers are mounted on the roller base via the roller shaft, with spacers attached to either side of the silicone rollers. The roller base is mounted on the annular base 101, and the sleeve 103 connects the upper and lower annular bases 101. The conveyor mechanism 10 is mounted on the control rod drive mechanism pressure housing, ensuring a tight fit between the silicone rollers and the housing, ensuring smooth lowering of the welding mechanism.

[0075] In some embodiments, as Figure 1 As shown, the two transmission mechanisms 10 are respectively mounted on the pressure-resistant shells of the two control rod drive mechanisms and connected to the clamping mechanism 20 to drive the clamping mechanism 20 to move relative to the tube seat 50 to ensure the stability of the clamping mechanism 20 during the movement.

[0076] like Figure 5 As shown, the clamping mechanism 20 includes a connecting component 201, multiple clamping components 202 and a driving component 203, the connecting component 201 is used to be sleeved on the tube seat 50, one end of the connecting component 201 is used to be connected to the conveying mechanism 10, and the connecting component 201 has a accommodating cavity; and multiple clamping components 202 are arranged at intervals along the circumference of the tube seat 50, and each clamping component 202 is connected to the connecting component 201; the driving component 203 is arranged in the accommodating cavity, and the driving component 203 and part of the wall surface of the accommodating cavity enclose a gas chamber, and the gas in the gas chamber can exert a force on the driving component 203 to make the driving component 203 move relative to the connecting component 201; wherein, the driving component 203 abuts against each clamping component 202, and the clamping component 202 is linked with the driving component 203 to drive each clamping component to move toward the tube seat 50 to clamp the tube seat 50.

[0077] With the above-described structure, the connecting assembly 201, connected to the conveyor mechanism 10, is sleeved onto the tube socket 50. As the conveyor mechanism 10 descends, it drives the connecting assembly 201 to smoothly descend along the axis of the control rod drive mechanism and move toward the tube socket 50. Multiple clamping assemblies 202, connected to the connecting assembly 201, are evenly arranged along the circumference of the tube socket 50. A driving member 203 is positioned within the accommodating cavity of the connecting assembly 201, so that the driving member 203 and a portion of the accommodating cavity wall form a gas chamber. When gas fills the gas chamber, the pressure of the gas within the gas chamber exerts a force on the driving member 203, pushing the driving member 203 relative to the connecting assembly 201. This forces each clamping assembly 202 to press against the outer wall of the tube socket 50, clamping the tube socket 50. This allows the welding mechanism 30, connected to the clamping mechanism 20, to move along the circumference of the tube socket 50, thereby ensuring the stability of the tube socket 50 during welding.

[0078] In some embodiments, the driving member 203 is a piston ring, which is placed in the accommodating cavity, and the outer ring 2012, the mounting plate 2013 and the side wall of the piston ring form a gas chamber, so that when the gas enters the gas chamber and applies force to the piston ring, it can push the piston ring to move upward.

[0079] like Figure 5As shown, the connecting assembly 201 includes a connecting plate 2011, an outer ring 2012 and a mounting plate 2013. The connecting plate 2011 is connected to the conveying mechanism 10; one end of the outer ring 2012 is connected to the connecting plate 2011; and the mounting plate 2013 is connected to the end of the outer ring 2012 away from the connecting plate 2011. The connecting plate 2011, the outer ring 2012 and the mounting plate 2013 are combined to form a accommodating cavity, and the mounting plate 2013 is provided with an air inlet hole connected to the gas chamber.

[0080] Specifically, the connecting plate 2011 and the mounting plate 2013 are both annular structures, and the tube seat 50 can pass through the inner holes of the connecting plate 2011 and the mounting plate 2013. The ends of the outer ring 2012 are connected to the outer peripheries of the connecting plate 2011 and the mounting plate 2013, respectively. The connecting plate 2011, the outer ring 2012, and the mounting plate 2013 together form a housing cavity to accommodate the driver 203. The mounting plate 2013 is provided with an air inlet hole connected to the gas chamber, allowing gas to enter the gas chamber through the air inlet hole, thereby increasing the gas pressure within the cavity and driving the driver 203 to move.

[0081] like Figure 5 As shown, the clamping assembly 202 includes a mounting block 2021, a clamping head 2022 and a resilient member 2023, wherein the mounting block 2021 is fixedly connected to the mounting plate 2013; the clamping head 2022 is movably connected to the mounting block 2021, and one end of the clamping head 2022 away from the mounting block 2021 is slidably connected to the connecting plate 2011, and the clamping head 2022 can move along the radial direction of the connecting plate 2011; and the resilient member 2023 is connected to the clamping head 2022 at one end and to the connecting plate 2011 at the other end, and provides a resilient force for the clamping head 2022 to move away from the control rod drive mechanism; wherein the driving member 203 includes a first guide sliding surface, and the clamping head 2022 includes a second guide sliding surface, the first guide sliding surface is in contact with the second guide sliding surface, and the first guide sliding surface and the second guide sliding surface are both inclined surfaces.

[0082] The first guide surface of the driving member 203 moves relative to the second guide surface of the clamp 2022, thereby pushing the clamp 2022 movably connected to the mounting block 2021 to move in the radial direction of the connecting plate 2011, i.e., the end of the clamp 2022 away from the mounting block 2021 moves toward the tube seat 50, so that the clamping assembly 202 can clamp the tube seat 50, thereby achieving relative fixation between the clamping mechanism 20 and the tube seat 50. The clamping assembly 202 also includes a rebound member 2023, which is connected to the clamp 2022 and has its other end connected to the connecting plate 2011. When gas is discharged from the gas chamber through the gas inlet hole, the driving member 203 loses gas pressure and moves downward, driving the mounting block 2021 to move downward toward the mounting block 2021. The rebound member 2023 connected to the clamp 2022 provides a rebound force for the clamp 2022 to move away from the tube seat 50, thereby moving the clamp 2022 away from the tube seat 50, releasing the clamping force of the clamping assembly 202 on the tube seat 50, and allowing the control rod drive mechanism to move relative to the clamping assembly 202.

[0083] The connecting plate 2011 includes a plurality of guide grooves, which are arranged at circumferential intervals along the connecting plate 2011, and one end of each chuck 2022 is arranged in the guide groove; the clamping assembly 202 also includes a limit plate 2024, which is fixedly connected to the connecting plate 2011 and is blocked at the notch of the guide groove to limit one end of the chuck 2022 from detaching from the guide groove.

[0084] Multiple guide slots on the connecting plate 2011 are spaced apart along the circumference of the connecting plate 2011, corresponding to the positions of the clamping assemblies 202. The side surfaces of the chuck 2022 abut against the sidewalls of the guide slots, allowing one end of the chuck 2022 of the clamping assembly 202 to be positioned within the guide slots. When the gas-driven driver 203 drives the mounting block 2021 upward, the guide slots guide the chuck 2022, causing it to move radially toward the control rod drive mechanism along the connecting plate 2011. A limit plate 2024 is connected to the connecting plate 2011 via a connecting rod. When the chuck 2022 slides relative to the connecting plate 2011, the limit plate 2024, located in the notch of the guide slots, limits the axial movement of the chuck 2022, preventing one end of the chuck 2022 from disengaging from the guide slots and ensuring the stability of the operation of the clamping assembly 202.

[0085] In some embodiments, as Figure 5 As shown, the clamping mechanism 20 includes a connecting plate 2011, a first resilient member support, a resilient member 2023, a second resilient member support, a limiting plate 2024, a chuck 2022, a sliding shaft, a mounting block 2021, a first sealing ring, a driving member 203, a second sealing ring, an outer ring 2012, a mounting plate 2013, and an air inlet. The first resilient member support is fixed to the chuck 2022, and the second resilient member support is fixed to the connecting plate 2011. The chuck 2022 includes a through hole through which the resilient member is connected to the first and second resilient member supports, respectively. A guide hole is provided in the chuck, which is aligned with the inclination direction of the second guide surface. The two ends of the sliding shaft are respectively fixedly connected to the mounting block. The sliding shaft passes through the guide hole and can slide relative to the guide hole. When the driving member moves upward under the action of gas pressure, the guide hole can move relative to the sliding shaft to provide guidance for the movement of the chuck. Limiting plate 2024 is connected to connecting plate 2011 and limits the position of chuck 2022. A first sealing ring and a second sealing ring are mounted on driver 203 to ensure the airtightness of the gas chamber. When compressed air enters the clamping mechanism 20 through the air inlet, the gas pressure pushes driver 203 upward, squeezing the multiple chucks toward the center, allowing clamping assembly 202 to clamp tube socket 50. The multiple chucks 2022 squeeze synchronously to ensure concentricity. When the compressed air exits the air inlet, the multiple chucks 2022 retract outward under the action of rebound member 2023, squeezing driver 203 downward and releasing the clamping mechanism 20.

[0086] like Figure 6 As shown, the welding mechanism 30 includes a fixed seat 301, an adjustment assembly and a welding gun 303, wherein the fixed seat 301 is connected to the clamping mechanism 20; the adjustment assembly is connected to the fixed seat 301; the welding gun 303 is connected to the adjustment assembly; wherein the adjustment assembly is used to adjust the position of the welding gun 303 along the axial direction and radial direction of the control rod drive mechanism.

[0087] The fixed seat 301 is connected to the clamping mechanism 20, and the adjusting mechanism 302 is connected to the fixed seat 301. When the clamping mechanism 20 approaches the tube seat 50 and clamps it, the welding gun 303 connected to the adjusting mechanism 302 can approach the tube seat 50. The adjusting mechanism 302 is used to adjust the axial and radial directions of the welding gun 303 relative to the control rod drive mechanism so that the welding gun 303 is adjusted to approach the weld between the compensation ring 60 and the tube seat 50 and weld it.

[0088] like Figure 6As shown, the adjustment assembly includes a first adjustment member 3021 and a second adjustment member 3022. The first adjustment member 3021 is connected to the fixed base 301 and can move relative to the fixed base 301 along the axial direction of the control rod drive mechanism; one end of the second adjustment member 3022 is connected to the first adjustment member 3021, and the other end of the second adjustment member 3022 is connected to the welding gun 303. The second adjustment member 3022 can move relative to the first adjustment member 3021 along the radial direction of the control rod drive mechanism.

[0089] Because the welding gun 303 is fixedly connected to one end of the second adjusting member 3022 and is connected to the fixed base 301 via the first adjusting member 3021, the first adjusting member 3021 moves relative to the fixed base 301 along the circumferential direction of the control rod drive mechanism, driving the welding gun 303 to move and adjust the circumferential position of the welding gun 303 relative to the tube base 50, so that the welding gun 303 can weld the weld along the circumferential direction. The other end of the second adjusting member 3022 is connected to the first adjusting member 3021 and can move relative to the first adjusting member 3021 along the radial direction of the control rod drive mechanism to adjust the radial position of the welding gun 303 relative to the tube base 50, adjusting the welding gun 303 in the radial direction to a position suitable for welding the weld, ultimately positioning the welding gun 303 in a position suitable for welding the weld, and enabling the welding of the weld.

[0090] like Figure 7 As shown, in some embodiments, the welding gun 303 includes a short pressure cap, a welding gun copper block, a tungsten electrode clamp, a miniaturized gas screen, a miniaturized porcelain nozzle, and a tungsten electrode. The miniaturized gas screen is threadedly mounted on the welding gun copper block, the tungsten electrode clamp is placed within the welding gun copper block, and the tungsten electrode extends through the tungsten electrode clamp from the miniaturized gas screen. The tungsten electrode is securely fixed by squeezing the short pressure cap and the tungsten electrode clamp, and the miniaturized porcelain nozzle is screwed onto the miniaturized gas screen. The miniaturized gas screen and miniaturized porcelain nozzle are shortened in overall length, allowing the welding gun 303 to adapt to the weld position. While ensuring welding quality, the welding gun 303 is reduced in size to be sufficient to enter the compensation ring 60 and reach the welding position, and sufficient space is reserved for arc voltage control and adjustment, ensuring high-quality welding.

[0091] like Figure 6 As shown, the welding mechanism 30 further includes a detection member 304, which is fixedly connected to the adjustment assembly for detecting the position of the weld.

[0092] The detection part 304 is fixedly connected to the adjustment component so that it can detect the weld position and observe the position of the welding gun 303, so that the position of the welding gun 303 can be adjusted by using the adjustment component to make it close to and reach the weld for welding, thereby realizing the positioning of the welding gun 303.

[0093] In some embodiments, the detection member 304 is an endoscopic camera, which is fixedly connected to the second adjustment member 3022. The position of the tungsten electrode tip of the welding gun 303 can be remotely observed through the endoscopic camera so that it can be adjusted through the adjustment component to make the tungsten electrode tip of the welding gun 303 reach the weld position and weld it.

[0094] like Figure 8 As shown, the welding device also includes a walking mechanism 40, which includes a fixed shell 401, a turntable 402 and a drive assembly 403. The fixed shell 401 is fixedly connected to the clamping mechanism 20; the turntable 402 is rotatably connected to the fixed shell 401 and is fixedly connected to the welding mechanism 30; the drive assembly 403 is fixedly connected to the turntable 402 to drive the turntable 402 to rotate relative to the fixed shell 401.

[0095] The fixed shell 401 is fixedly connected to the clamping mechanism 20 to connect the walking mechanism 40 to the clamping mechanism 20. The driving assembly 403 fixedly connected to the turntable 402 drives the turntable 402 to rotate relative to the fixed shell 401, so that the welding mechanism 30 fixedly connected to the turntable 402 can rotate relative to the clamping mechanism 20, so that the welding mechanism 30 can weld the welds along the circumference of the pipe seat 50.

[0096] In some embodiments, the conveying mechanism 10 is connected to the fixed housing 401 and the connecting plate 2011 through an L-shaped bracket to achieve the connection between the conveying mechanism 10 and the clamping mechanism 20 and the walking mechanism 40.

[0097] like Figure 8 As shown, the walking mechanism 40 also includes a rotating ring gear 404, which is fixedly connected to the fixed shell 401; the driving assembly 403 includes a motor mounting seat 4031, a driving motor 4032 and a driving gear 4033, the motor mounting seat 4031 is fixedly connected to the turntable 402; the driving motor 4032 is connected to the motor mounting seat 4031; and the driving gear 4033 is fixedly connected to the motor shaft of the driving motor 4032, and the driving gear 4033 is engaged with the rotating ring gear 404 to drive the turntable 402 to rotate relative to the fixed shell 401.

[0098] The rotary disk 402 rotates relative to the fixed housing 401 through the rotary ring gear 404. Specifically, the rotary ring gear 404 is fixedly connected to the fixed housing 401, the drive motor 4032 is connected to the motor mounting seat 4031, and the drive gear 4033 connected to the motor shaft of the drive motor 4032 is engaged with the rotary ring gear 404. Since the motor mounting seat 4031 is fixedly connected to the rotary disk 402, when the drive motor shaft rotates, the drive motor 4032 connected to the rotary disk 402 through the motor mounting seat 4031 can drive the rotary disk 402 to rotate relative to the rotary ring gear 404, thereby realizing the rotation of the rotary disk 402 relative to the fixed housing 401 fixedly connected to the rotary ring gear 404, so as to drive the welding mechanism 30 to weld the welds along the circumference of the control rod drive mechanism.

[0099] like Figure 8 As shown, the walking mechanism 40 further includes a plurality of concentric shafts 405 fixedly connected to the rotary disk 402 . The plurality of concentric shafts 405 are spaced apart along the circumference of the rotary disk 402 , and the concentric shafts 405 fit in contact with the outer circumference of the rotary gear ring 404 .

[0100] Multiple concentric shafts 405 are connected to the turntable 402 and are arranged at intervals along the circumference of the turntable 402. The concentric shafts 405 are in contact with the outer peripheral surface of the rotating ring gear 404, so that when the turntable 402 rotates relative to the fixed shell 401 under the action of the drive motor 4032, the concentric shafts 405 can adjust the position of the turntable 402 during rotation to avoid offset, thereby ensuring the welding effect.

[0101] In some embodiments, the outer ring of the rotating gear ring 404 is V-shaped, and the portion where the concentric shaft 405 fits with the outer peripheral surface of the rotating gear ring 404 is a V-shaped groove, so that the concentric shaft 405 and the outer peripheral surface of the rotating gear ring 404 can cooperate and rotate relative to each other.

[0102] Through the welding device, the welding mechanism 30 is fixed on the traveling mechanism 40, the traveling mechanism 40 and the conveying mechanism 10 are fixed on the L-shaped connecting bracket, and the L-shaped connecting bracket is connected to the clamping mechanism 20. Through the conveying mechanism 10, the welding device slides down along the control rod driving mechanism to above the tube seat 50. Through the clamping mechanism 20, the welding device clamps the tube seat 50 to fix the position. The position of the welding gun 303 and the weld is observed by the detection part 304. The welding gun 303 is driven by the welding mechanism 30 to reach the position of the weld to be welded. Under the drive of the traveling mechanism 40, the welding mechanism 30 travels circumferentially along the tube seat 50, so that discharge and arc are struck between the welding gun 303 and the tube seat 50 and the compensation ring 60, and the butt welding of the two is achieved by melting the tube seat 50 and the compensation ring 60.

[0103] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A welding device for welding the weld between a compensation ring and a tube seat of a control rod drive mechanism, characterized in that: The welding device comprises: a transmission mechanism, configured to be sleeved on the control rod drive mechanism and disposed away from the compensation ring and the tube seat, wherein the transmission mechanism is capable of moving along the axial direction of the control rod drive mechanism; a clamping mechanism connected to the conveying mechanism and used for clamping the tube seat; a welding mechanism connected to the clamping mechanism, the welding mechanism being movable along the circumference of the pipe seat and being used to weld the weld; The clamping mechanism comprises: a connecting assembly, configured to be sleeved on the control rod drive mechanism, one end of the connecting assembly being configured to be connected to the transmission mechanism, the connecting assembly having a receiving cavity; a plurality of clamping assemblies spaced apart along the circumference of the CRDM, each of the clamping assemblies being connected to the connecting assembly; and a driving member disposed in the accommodating chamber, wherein the driving member and a portion of the wall of the accommodating chamber enclose a gas chamber, and gas in the gas chamber can exert a force on the driving member to move the driving member relative to the connecting assembly; wherein the driving member abuts against each of the clamping assemblies, and the clamping assemblies are linked with the driving member to drive each of the clamping assemblies to move toward the control rod drive mechanism to clamp the control rod drive mechanism; The connection component includes: a connecting plate connected to the transmission mechanism; an outer ring, one end of which is connected to the connecting plate; and The mounting plate is connected to one end of the outer ring away from the connecting plate, the connecting plate and the outer ring The mounting plate encloses the accommodating cavity, and the mounting plate is provided with an air inlet hole communicating with the gas chamber; Each of the clamping assemblies comprises: a mounting block fixedly connected to the mounting plate; a chuck movably connected to the mounting block, wherein one end of the chuck away from the mounting block is slidably connected to the connecting plate, and the chuck is capable of moving along the radial direction of the connecting plate; and a resilient member, one end of which is connected to the clamp and the other end of which is connected to the connecting plate, the resilient member providing a resilient force for the clamp to move away from the control rod drive mechanism; Wherein, the driving member includes a first guide sliding surface, the chuck includes a second guide sliding surface, the first guide sliding surface is in contact with the second guide sliding surface, and the first guide sliding surface and the second guide sliding surface are both inclined surfaces.

2. The welding device according to claim 1, characterized in that The transmission mechanism comprises: an annular base, configured to be sleeved on the control rod drive mechanism and connected to the clamping mechanism; and A plurality of rollers are provided on the inner peripheral wall of the annular base and are spaced apart along the circumference of the annular base. Each of the rollers can abut against the control rod drive mechanism and can roll along the axis of the control rod drive mechanism.

3. The welding device according to claim 2, characterized in that There are two annular bases, each of which is provided with a plurality of rollers, and the transmission mechanism further includes: a sleeve, the sleeve being used to be sleeved on the control rod drive mechanism; The two annular bases are respectively fixedly connected to the two ends of the sleeve.

4. The welding device according to claim 1, characterized in that The connecting plate includes a plurality of guide grooves, which are arranged at intervals along the circumference of the connecting plate, and one end of each clamp is arranged in the guide groove; the clamping assembly also includes: A limit plate is fixedly connected to the connecting plate and is blocked at the notch of the guide slot to limit one end of the clamp from being separated from the guide slot.

5. The welding device according to any one of claims 1 to 3, characterized in that: The welding mechanism comprises: a fixing seat connected to the clamping mechanism; an adjusting assembly connected to the fixing seat; and a welding gun connected to the adjustment assembly; The adjustment assembly is used to adjust the position of the welding gun along the axial direction and the radial direction of the control rod drive mechanism.

6. The welding device according to claim 5, characterized in that The adjustment component includes: a first adjusting member connected to the fixing seat and capable of moving relative to the fixing seat along the axial direction of the CRDM; and A second adjusting member, one end of which is connected to the first adjusting member, the other end of which is connected to the welding gun, and the second adjusting member can move relative to the first adjusting member along the radial direction of the control rod drive mechanism.

7. The welding device according to claim 5, characterized in that The welding mechanism further includes a detection member fixedly connected to the adjustment assembly for detecting the position of the weld.

8. The welding device according to any one of claims 1 to 3, characterized in that: The welding device further includes a traveling mechanism, which includes: A fixed housing, fixedly connected to the clamping mechanism; a rotary disk rotatably connected to the fixed housing and fixedly connected to the welding mechanism; The driving assembly is fixedly connected to the rotary disk to drive the rotary disk to rotate relative to the fixed shell.

9. The welding device according to claim 8, characterized in that The walking mechanism further includes a rotating ring gear, which is fixedly connected to the fixed housing; the driving assembly includes: A motor mounting base, fixedly connected to the rotary disk; a drive motor connected to the motor mounting base; and A driving gear is fixedly connected to the motor shaft of the driving motor, and the driving gear is engaged with the rotating ring gear to drive the rotating disk to rotate relative to the fixed housing.

10. The welding device according to claim 9, characterized in that The walking mechanism further comprises a plurality of concentric shafts fixedly connected to the rotary disk, wherein the plurality of concentric shafts are arranged at intervals along the circumference of the rotary disk, and the concentric shafts are in contact with the outer circumferential surface of the rotary gear ring.

Images