CN115430882B - Underwater welding repair device for spent fuel pool - Google Patents
Underwater welding repair device for spent fuel pool Download PDFInfo
- Publication number
- CN115430882B CN115430882B CN202211070127.1A CN202211070127A CN115430882B CN 115430882 B CN115430882 B CN 115430882B CN 202211070127 A CN202211070127 A CN 202211070127A CN 115430882 B CN115430882 B CN 115430882B
- Authority
- CN
- China
- Prior art keywords
- clamping
- slip ring
- rotating shaft
- gas
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0061—Underwater arc welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides an underwater welding repair device for a spent fuel pool, relates to the technical field of underwater patch welding repair, and solves the problems that in the prior art, repair work mainly adopts removal of spent fuel and evacuation of the pool, personnel directly enter the pool for repair, and the steps are complicated and the safety is poor. The device comprises a drain cover and a welding mechanism arranged in the drain cover, wherein the welding mechanism comprises a power transmission structure, a rotating shaft, a gas-electric slip ring structure, a welding gun structure and a clamping structure, before welding repair, a repair plate can be clamped by the clamping structure, after the whole underwater welding repair device moves to a defect position to be repaired, the repair plate is attached to the defect position to be repaired, the clamping structure can be loosened to release the grabbing of the repair plate, and then gas is introduced into the drain cover to create a partially dried underwater environment; the power transmission structure can drive the welding gun structure to rotate along the welding direction through the rotating shaft.
Description
Technical Field
The invention relates to the technical field of underwater patch welding repair, in particular to an underwater welding repair device for a spent fuel pool.
Background
The spent fuel pool is a pool for storing spent fuel in nuclear facilities such as a nuclear power plant and a post-treatment plant. The foundation structure of the spent fuel pool is reinforced concrete with the thickness of 0.8-3 m, and the wall surface of the concrete is coated with a layer of stainless steel with the thickness of 4-14 mm as a lining, which is called a cladding or a cladding plate. At present, in-service and under-construction and under-research third-generation nuclear power stations such as CAP1400 mainly adopt S32101 duplex stainless steel cladding and are welded by using similar ER-2209 stainless steel welding wires. Engineering practice shows that corrosion crack defects such as pitting corrosion, crevice corrosion, intergranular corrosion, stress cracking and the like are easy to occur when the spent fuel pool-faced steel plate is in service for a long time. The leakage of the spent fuel pool is a urgent problem to be solved in the nuclear power station in service in China and even the world, and the leakage of radioactive water medium can be caused, and the safety of the spent fuel is even endangered under severe conditions, so that serious nuclear safety accidents are caused. Particularly, after an accident of the japan foolish nuclear power station in 2011, the problem of leakage of the spent fuel pool stainless steel cladding due to local corrosion is a problem of great concern in the nuclear industry and academia. Once the nuclear power spent fuel pool leaks, how to carry out safe and reliable online maintenance on the spent fuel pool and ensure the safety of the spent fuel pool and the spent fuel is a great weight in the current domestic and foreign researches.
The nuclear power station spent fuel pool designed in the early stage is communicated with facilities such as a reactor internals inspection well and the like, so that when the spent fuel is leaked, the spent fuel is temporarily stored in the reactor internals inspection well so as to reduce radiation doses born by personnel and equipment in the maintenance process. The prior maintenance operation in China mainly adopts the steps of removing spent fuel and evacuating a water tank, and personnel directly enter the water tank for repair. The maintenance preparation time is long by using the technology, and the personnel irradiation risk is extremely high. However, the spent fuel pool including the AP/CAP and most of the second generation plus series units are not in communication, and if leakage occurs, the operation cannot be performed, which brings great danger to maintenance work. At present, the domestic nuclear power industry is developed at a high speed, new units are continuously put into construction and operation, and the safe operation of a spent fuel pool is a guarantee for the safe operation of a power station. More and more spent fuel pools face the requirement of defect repair, so that development and application of the underwater welding maintenance technology of the spent fuel pools can promote development of the domestic nuclear power maintenance technology on one hand and can improve safe operation of nuclear power on the other hand.
Disclosure of Invention
In view of the above, in order to solve the technical problems that in the prior art, the repair operation mainly adopts the steps of removing the spent fuel and evacuating the pool, personnel directly enter the pool to repair, the steps are complicated and the safety is poor, the invention aims to provide an underwater welding repair device for the spent fuel pool.
In order to achieve the above purpose, the invention provides an underwater welding repair device for a spent fuel pool, which comprises a drain cover and a welding mechanism arranged in the drain cover, wherein gas can be introduced into the drain cover through the drain cover, the welding mechanism comprises a power transmission structure, a rotating shaft, a gas-electric slip ring structure, a welding gun structure and a clamping structure, the power transmission structure is connected with the rotating shaft, the welding gun structure is connected with the rotating shaft, the power transmission structure can drive the welding gun structure to rotate along the direction to be welded through the rotating shaft, the gas-electric slip ring structure is sleeved on the periphery of the rotating shaft, and the clamping structure is arranged at the end part of the rotating shaft to clamp a patch.
As a further improvement of the invention, the power transmission structure comprises a power structure and a transmission structure, wherein the power structure is connected with the transmission structure, the transmission structure is arranged on the gas-electric slip ring structure and is connected with the rotating shaft, and the power structure can drive the rotating shaft to rotate through the transmission structure.
As a further improvement of the invention, the transmission structure is a gear meshing structure and comprises a first gear and a second gear, wherein a first through hole allowing an output shaft of the power structure to pass through is formed in the first gear, the output shaft of the power structure can drive the first gear to rotate, the second gear is meshed with the first gear, a second through hole allowing the rotating shaft to pass through is formed in the second gear, and the second gear can drive the rotating shaft to rotate.
As a further improvement of the invention, the gas-electric slip ring structure comprises a slip ring support and a gas-electric slip ring arranged on the slip ring support, wherein the gas-electric slip ring is arranged below the slip ring support, through holes allowing the rotating shaft to pass through are formed in the gas-electric slip ring and the slip ring support, the power structure is fixed below the slip ring support, the transmission structure is arranged above the slip ring support, and the slip ring support is arranged inside the drain cover through a support connection structure.
As a further improvement of the invention, the drain cover comprises a top plate and a side plate, wherein the side plate is connected with the top plate and is enclosed into a square structure with an opening at the bottom; the support connection structure comprises a connection support rod and a connection bolt, wherein the connection support rod is fixed above the slip ring support, mounting holes corresponding to the connection support rods in number and position are formed in the top plate, and the end part, far away from the slip ring support, on the connection support rod can penetrate out of the mounting holes and then is matched with the connection bolt.
As a further improvement of the invention, the bottom of the side plate is provided with a placing groove, the longitudinal section of the placing groove is in an inverted U shape, and a porous exhaust sealing medium is arranged in the placing groove.
As a further improvement of the invention, the gas-electric slip ring comprises a first gas-electric slip ring body and a second gas-electric slip ring body, wherein the first gas-electric slip ring body is fixedly connected with the surface, which is far away from the top plate, of the slip ring support, the second gas-electric slip ring body is arranged at the end part, far away from the slip ring support, of the first gas-electric slip ring body, the second gas-electric slip ring body is connected with the rotating shaft, the rotating shaft can drive the second gas-electric slip ring body to synchronously rotate, a stator inlet hole and a stator inlet port are arranged on the first gas-electric slip ring body, and a rotor outlet hole and a rotor outlet port are arranged on the second gas-electric slip ring body.
As a further improvement of the invention, the welding gun structure comprises a welding gun support, a wire feeding pipe, a welding gun and a waterproof camera part, wherein the welding gun support is used for placing the welding gun and is fixedly connected with the rotating shaft, the waterproof camera part is arranged on the welding gun support, a wire feeding bent pipe is connected to the welding gun, a wire feeding pipe channel allowing the wire feeding pipe to penetrate is formed in the rotating shaft, a pipe inlet communicated with the wire feeding pipe channel is formed in the top of the rotating shaft, a pipe outlet communicated with the wire feeding pipe channel is formed in the side part of the rotating shaft, and the wire feeding pipe can be connected into the inner cavity of the drain cover from the outside of the drain cover and extends out of the pipe outlet to be connected with the wire feeding bent pipe after extending into the wire feeding pipe channel through the pipe inlet.
As a further improvement of the invention, the clamping structure comprises a pressing module, a clamping jaw module and an empty sleeve module, wherein the pressing module is connected with the rotating shaft through the empty sleeve module so as to enable the clamping structure and the rotating shaft to form idle running, the pressing module is connected with the clamping jaw module, when external force drives the clamping structure to apply pressure to the pool wall to be repaired, the reaction force acting on the pressing module can enable the clamping jaw module to move in a direction away from the pool wall to be repaired, and after the reaction force moves to a preset position, the clamping jaw module can be driven to move upwards so as to loosen the repairing plate.
As a further improvement of the invention, the compression module comprises a compression plate, a protruding shaft, a compression spring, a sliding thimble, a thimble spring and a compression end cover, wherein the protruding shaft is arranged on the compression plate, the compression end cover is arranged on the periphery of the protruding shaft, the compression spring is arranged between the compression end cover and the compression plate, the sliding thimble is sleeved on the periphery of the protruding shaft and is positioned above the compression end cover, the compression spring is arranged between the compression end cover and the compression plate, the thimble spring is arranged between the compression end cover and the sliding thimble, the compression spring and the thimble spring are sleeved on the periphery of the protruding shaft, the clamping jaw module is connected with the sliding thimble, a sleeve shaft is arranged on the periphery of the sliding thimble, the upper end of the sleeve shaft is connected with the rotating shaft through the empty sleeve module, the lower end of the sleeve shaft is connected with the compression end cover, the sleeve shaft is connected with the sliding thimble through a clamping piece structure, the protruding shaft is provided with the clamping piece, and the clamping piece is matched with the thimble in a moving direction far away from the sliding thimble, and the clamping groove is far away from the sliding thimble.
According to the underwater welding repair device for the spent fuel pool, before welding repair, the repair plate can be clamped by the clamping structure, and after the whole underwater welding repair device moves to the position of the defect to be repaired, the repair plate is attached to the position of the defect to be repaired, the clamping structure can be loosened to release the grabbing of the repair plate, and then gas is introduced into the drainage cover to create a local dry underwater environment; the welding gun structure is driven to rotate and weld for a circle through the power transmission structure, and the welding repair work of the bottom surface or the wall surface of the spent fuel pool can be completed. The underwater welding repair device for the spent fuel pool provided by the invention has the advantages of simple structure, convenience in use and reliability in operation, and is suitable for underwater welding repair of the bottom surface and the wall surface of the spent fuel pool.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of an underwater welding repair device for a spent fuel pool, which is provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of the internal structure of an underwater welding repair device for a spent fuel pool according to an embodiment of the present invention;
FIG. 3 is a schematic view of a welding mechanism according to an embodiment of the present invention;
FIG. 4 is a schematic view of a drain cover according to an embodiment of the present invention;
FIG. 5 is a schematic view of a welding gun structure according to an embodiment of the present invention;
FIG. 6 is a schematic view of a clamping structure provided by an embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating the cooperation between a driving structure and a slip ring support according to an embodiment of the present invention;
FIG. 8 is a schematic view of a gas-electric slip ring structure provided by an embodiment of the present invention;
FIG. 9 is a cross-sectional view of an electro-pneumatic slip ring structure provided by an embodiment of the present invention;
FIG. 10 is a schematic diagram of a compression module according to an embodiment of the present invention;
FIG. 11 is another schematic view of a compacting module (not shown) according to an embodiment of the present invention;
FIG. 12 is a cross-sectional view of a compression module provided by an embodiment of the present invention;
FIG. 13 is a schematic view illustrating the cooperation of a male shaft and a compression plate according to an embodiment of the present invention;
FIG. 14 is a schematic diagram illustrating the cooperation between a clip structure and a sliding thimble according to an embodiment of the present invention.
Reference numerals: 1. a drain cover; 110. a top plate; 120. a side plate; 2. a power structure; 3. a transmission structure; 31. a first gear; 32. a second gear; 4. a rotation shaft; 5. a gas-electric slip ring structure; 51. a slip ring support; 52. a first gas electric slip ring body; 521. a stator air inlet hole; 522. a stator inlet; 53. a second gas-electric slip ring body; 531. a rotor air outlet hole; 532. a rotor outlet; 6. connecting a supporting rod; 7. a connecting bolt; 8. a porous exhaust sealing medium; 9. a clamping structure; 91. a compaction module; 911. a compacting plate; 912. a protruding shaft; 9121. a first protruding shaft portion; 9122. a second protruding shaft portion; 9123. a chute; 913. a compression spring; 914. sliding the thimble; compressing the end cover; 916. a thimble spring; 917. a sleeve shaft; 9171. a main shaft; 9172. an outer ring fixing ring; 9173. a long groove; 918. a clamping piece structure; 9181. a first clamping piece; 9182. a second clamping piece; 9183. a bolt head; 9184. an elastic element; 92. a jaw module; 921. a first pull rod; 922. a second pull rod; 10. a welding gun structure; 101. a welding gun bracket; 102. a wire feeding tube; 103. a waterproof imaging unit; 104. wire feeding bent pipe; 11. and (5) supplementing plates.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
In the description of the present invention, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
Referring to fig. 1-14, the invention provides an underwater welding repair device for a spent fuel pool, which comprises a drainage cover 1 and a welding mechanism arranged in the drainage cover 1, wherein gas is introduced into the drainage cover 1, and a local dry underwater environment is created.
Wherein, welding mechanism includes power transmission structure 3, rotation axis 4, gas electricity sliding ring structure 5, welder structure 10 and clamping structure 9, power transmission structure 3 is connected with rotation axis 4, welder structure 10 is connected with rotation axis 4, power transmission structure 3 can drive welder structure 10 through rotation axis 4 and take place to rotate along waiting the welding direction, the periphery of rotation axis 4 is located to gas electricity sliding ring structure 5 cover, clamping structure 9 sets up in the tip of rotation axis 4 in order to realize the centre gripping to complement board 11, it is to be noted that clamping structure 9 in this embodiment is not along with rotation of rotation axis 4 and rotation.
The power transmission structure 3 in this embodiment includes a power structure 2 and a transmission structure 3, wherein the power structure 2 is connected with the transmission structure 3, the transmission structure 3 is mounted on the gas-electric slip ring structure 5 and the transmission structure 3 is connected with the rotation shaft 4, and the power structure 2 can drive the rotation shaft 4 to rotate through the transmission structure 3.
Specifically, the transmission structure 3 is a gear engagement structure, and includes a first gear 31 and a second gear 32, a first through hole allowing an output shaft of the power structure 2 to pass through is provided on the first gear 31, the output shaft of the power structure 2 can drive the first gear 31 to rotate, the second gear 32 is engaged with the first gear 31, a second through hole allowing the rotation shaft 4 to pass through is provided on the second gear 32, and the second gear 32 can drive the rotation shaft 4 to rotate, where preferably, the power structure 2 in the embodiment is a direct current speed reduction motor.
The gas-electricity slip ring structure 5 comprises a slip ring support 51 and a gas-electricity slip ring arranged on the slip ring support 51, the gas-electricity slip ring is arranged below the slip ring support 51, through holes allowing the rotary shaft 4 to pass through are formed in the gas-electricity slip ring and the slip ring support 51, the power structure 2 is fixed below the slip ring support 51 through bolts, the transmission structure 3 is arranged above the slip ring support 51, and the slip ring support 51 is arranged inside the drainage cover 1 through a supporting connection structure.
As an alternative implementation manner of this embodiment, the drain cover 1 includes a top plate 110 and a side plate 120, where the side plate 120 is connected to the top plate 110 and enclosed into a square structure with an opening at the bottom. Four symmetrical air inlet quick connectors are arranged on the top plate 110, and wiring grooves are also arranged on the top plate. The support connection structure comprises a connection support rod 6 and connection bolts 7, four connection support rods 6 are fixed above the slip ring support 51, mounting holes corresponding to the number and the positions of the connection support rods 6 are formed in the top plate 110, and the end part, far away from the slip ring support 51, of the connection support rod 6 can be matched with the corresponding connection bolts 7 after penetrating out of the mounting holes.
The bottom of curb plate 120 has seted up and has been placed the recess, and the longitudinal cross-sectional shape of placing the recess is "U" shape, is provided with porous exhaust sealing medium 8 in the recess of placing, and porous exhaust sealing medium 8 can adopt the sponge, and gas and liquid can be discharged outside the drain cover 1 through porous exhaust sealing medium 8 like this, is convenient for make the inside dry underwater environment of building of drain cover 1.
In this embodiment, the gas-electric slip ring includes a first gas-electric slip ring body 52 and a second gas-electric slip ring body 53, the first gas-electric slip ring body 52 forms a fixed connection with the surface of the slip ring support 51, which is away from the top plate 110, the second gas-electric slip ring body 53 is disposed at the end of the first gas-electric slip ring body 52, which is far away from the slip ring support 51, the second gas-electric slip ring body 53 is connected with the rotating shaft 4 through a fixing bolt, and the rotating shaft 4 can drive the second gas-electric slip ring body 53 to rotate synchronously, a stator air inlet 521 and a stator wire inlet 522 are disposed on the first gas-electric slip ring body 52, and a rotor air outlet 531 and a rotor wire outlet 532 are disposed on the second gas-electric slip ring body 53. Rotor outlet 532 is configured to provide power to torch structure 10 and rotor outlet 531 is configured to provide weld shielding gas to torch structure 10. Since the welding gun structure 10 rotates along with the rotation shaft 4, in this embodiment, the second gas-electric slip ring body 53 is preferably also configured to rotate along with the rotation of the rotation shaft 4, so that the winding of the line or the pipeline can be avoided, and the normal operation of the device can be ensured.
The welding gun structure 10 comprises a welding gun support 101, a wire feeding tube 102, a welding gun and a waterproof camera 103, wherein the welding gun support 101 is used for placing the welding gun, and the welding gun support 101 and the rotating shaft 4 form detachable fixed connection through bolts, so that the welding gun structure is convenient to assemble and disassemble and convenient to maintain in later period. The waterproof camera 103 is mounted on the welding gun support 101, and can rotate along with the welding gun simultaneously in the use process, so that the state of a molten pool is monitored in real time. In addition, a wire feeding bent pipe 104 is connected to the welding gun, a wire feeding pipe 102 channel allowing the wire feeding pipe 102 to penetrate is formed in the rotary shaft 4, a pipe inlet communicated with the wire feeding pipe 102 channel is formed in the top of the rotary shaft 4, a pipe outlet communicated with the wire feeding pipe 102 channel is formed in the side portion of the rotary shaft 4, the wire feeding pipe 102 can be connected to the inner cavity of the drain cover 1 from the outside of the drain cover 1, and after the wire feeding pipe 102 channel is extended through the pipe inlet, the wire feeding pipe 102 is extended out of the pipe outlet to be connected with the wire feeding bent pipe 104, so that the winding of the wire feeding pipe 102 is prevented from influencing the welding work.
When welding maintenance is performed in a nuclear power plant, welding of the patch panel 11 is an important welding mode. Generally, a circular patch 11 is adopted, because the patch 11 is circular in shape and difficult to clamp, and the clamping structure 9 is provided according to the difficult clamping point of the circular patch 11, and comprises a pressing module 91, a clamping jaw module 92 and an empty sleeve module, the pressing module 91 is connected with the rotating shaft 4 through the empty sleeve module so that the clamping structure 9 and the rotating shaft 4 form idle running, the pressing module 91 is connected with the clamping jaw module 92, when the clamping structure 9 is driven by external force to apply pressure to a pool wall to be repaired, the clamping jaw module 92 can move towards a direction far away from the pool wall to be repaired by reaction force acting on the pressing module 91, and after the clamping jaw module 92 moves to a preset position, the clamping jaw module 92 can be driven to move upwards so as to loosen the patch 11.
In this embodiment, the compression module 91 includes a compression plate 911, a protruding shaft 912, a compression spring 913, a sliding thimble 914, a thimble spring 916, and a compression end cover, where the compression plate 911 is provided with the protruding shaft 912, the periphery of the protruding shaft 912 is provided with the compression end cover, the compression plate 911 is used for contacting with the patch 11, the protruding shaft 912 includes a first protruding shaft portion 9121 connected with the compression plate 911 and a second protruding shaft portion 9122 disposed above the first protruding shaft portion 9121, the outer diameter of the second protruding shaft portion 9122 is smaller than the outer diameter of the first protruding shaft portion 9121, and the junction between the first protruding shaft portion 9121 and the second protruding shaft portion 9122 is a smooth transition with an inclined plane.
A compression spring 913 is arranged between the compression end cover and the compression plate 911, the sliding thimble 914 is sleeved on the periphery of the protruding shaft 912 and is positioned above the compression end cover, the compression spring 913 is arranged between the compression end cover and the compression plate 911, a thimble spring 916 is arranged between the compression end cover and the sliding thimble 914, the compression spring 913 and the thimble spring 916 are sleeved on the periphery of the protruding shaft 912, the clamping jaw module 92 is fixedly connected with the upper part of the sliding thimble 914 through screws, and a sleeve 917 is arranged on the periphery of the sliding thimble 914.
The sleeve spindle 917 comprises a spindle 9171 and an outer ring fixing ring 9172 sleeved on the periphery of the spindle 9171, wherein the upper end of the spindle 9171 is connected with the rotating shaft 4 through a hollow sleeve module, and the spindle 9171 and the rotating shaft 4 can be connected by a bearing assembly, which is mature in the prior art, so that the spindle 9171 does not rotate when the rotating shaft 4 rotates. Spindle 9171 is sleeved on the periphery of sliding thimble 914. The lower end of spindle 9171 is connected to a compression end cap and sleeve spindle 917 is connected to sliding thimble 914 by a catch structure 918. Specifically, the clip structure 918 includes a bolt head 9183, a first clip 9181, a second clip 9182, and an elastic element 9184, where the bolt head 9183 is mounted on the outer ring fixing ring 9172, the elastic element 9184 is a spring and is disposed in the bolt head 9183, the first clip 9181 is mounted inside the sliding thimble 914, a chute 9123 is disposed on the protruding shaft 912, an end of the first clip 9181 is matched with the chute 9123, the second clip 9182 is disposed between the elastic element 9184 and the first clip 9181, and one end of the second clip 9182 can extend into the bolt head 9183 to form an abutment with the elastic element 9184, and the other end of the second clip 9182 can extend into the sliding thimble 914 to form an abutment with the first clip 9181, and three sets of clip structures 918 are disposed along the circumferential direction of the sliding thimble 914.
Specifically, when the external force drives the underwater welding repair device to apply force to compress the patch 11 and the bottom surface and wall surface of the spent fuel pool to be repaired, a reaction force acts on the compressing plate 911, and it should be noted that a gap is left between the second protruding shaft portion 9122 and the bottom of the rotating shaft 4, when the reaction force acts on the compressing plate 911, the compressing plate 911 and the protruding shaft 912 thereon move upwards, that is, move towards the direction close to the rotating shaft 4, at the same time, the inclined surface at the connection position of the first protruding shaft portion 9121 and the second protruding shaft portion 9122 becomes to support the clip structure 918 to move outwards, specifically, the first clip 9181 is always matched with the sliding groove 9123 on the first protruding shaft portion 9121 and the second protruding shaft portion 9122, and the upward movement of the protruding shaft 912 can make the second clip 9182 separate from the sliding thimble 914, that is separated from the first clip 9181, and at the same time, the second clip moves outwards can squeeze the elastic element 9184 in the bolt head portion 9183. When second clamp 9182 is disengaged from sliding ejector 914, sliding ejector 914 can move upward under the force of ejector spring 916 under it, and upward movement of sliding ejector 914 drives jaw module 92 to move upward together, so that the grabbing action of jaw module 92 on patch 11 can be released.
In this embodiment, clamping jaw module 92 includes three clamping jaws that are uniformly spaced along the circumference of sliding spike 914. Each clamping jaw comprises a first pull rod 921 and a second pull rod 922, one end of the first pull rod 921 is fixedly connected with the sliding thimble 914, and the other end of the first pull rod 921 is movably connected with the second pull rod 922 through a connecting shaft. The spindle 9171 is provided with an elongated slot 9173 along the axial direction thereof, one end of the first pull rod 921 can be connected to the sliding thimble 914 through the elongated slot 9173, and the first pull rod 921 can move in the length direction of the elongated slot 9173 within the elongated slot 9173. The end connected with the first pull rod 921 on the second pull rod 922 is U-shaped, the connecting shaft penetrates through the first pull rod 921 and the second pull rod 922 to be connected, and a spring is arranged on the connecting shaft, so that the clamping jaw can move inwards when the patch 11 is loosened under the action of the spring, and interference to welding of a rear welding gun is avoided.
According to the underwater welding repair device for the spent fuel pool, before welding repair, the repair plate 11 can be clamped by the clamping structure 9, and after the whole underwater welding repair device moves to the position of the defect to be repaired, the repair plate 11 is tightly attached to the position of the defect to be repaired, the clamping structure 9 can be loosened to release the grabbing of the repair plate 11, and then gas is introduced into the drainage cover 1 to create a local dry underwater environment; and the welding gun structure 10 is driven to rotate and weld for one circle through the power transmission structure 3, so that the welding repair work of the bottom surface or the wall surface of the spent fuel pool can be completed. The underwater welding repair device for the spent fuel pool provided by the invention has the advantages of simple structure, convenience in use and reliability in operation, and is suitable for underwater welding repair of the bottom surface and the wall surface of the spent fuel pool.
The foregoing is merely illustrative embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present invention, and the invention should be covered. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (8)
1. The underwater welding repair device for the spent fuel pool is characterized by comprising a drainage cover and a welding mechanism arranged in the drainage cover, wherein gas can be introduced into the drainage cover through the drainage cover, the welding mechanism comprises a power transmission structure, a rotating shaft, a gas-electric slip ring structure, a welding gun structure and a clamping structure, the power transmission structure is connected with the rotating shaft, the welding gun structure is connected with the rotating shaft, the power transmission structure can drive the welding gun structure to rotate along the direction to be welded through the rotating shaft, the gas-electric slip ring structure is sleeved on the periphery of the rotating shaft, and the clamping structure is arranged at the end part of the rotating shaft so as to clamp a complementary plate;
the clamping structure comprises a pressing module, a clamping jaw module and an empty sleeve module, wherein the pressing module is connected with the rotating shaft through the empty sleeve module so as to enable the clamping structure and the rotating shaft to form idle running, the pressing module is connected with the clamping jaw module, when external force drives the clamping structure to apply pressure to the pool wall to be repaired, the reaction force acting on the pressing module can enable the clamping jaw module to move in the direction away from the pool wall to be repaired, and after the reaction force moves to a preset position, the clamping jaw module can be driven to move upwards so as to loosen the repairing plate;
the clamping device comprises a clamping device, a clamping device and a clamping device, wherein the clamping device comprises a clamping module and a clamping pool, the clamping device comprises a clamping device and is characterized in that the clamping module comprises a clamping plate, a protruding shaft, a clamping spring, a sliding thimble, a thimble spring and a clamping end cover, the protruding shaft is arranged on the clamping plate, the clamping end cover is arranged on the periphery of the protruding shaft in a sleeved mode, the clamping device is arranged on the clamping pool in a sleeved mode, the clamping pool is arranged on the protruding shaft in a matched mode, the thimble spring is arranged on the clamping pool, the clamping pool is arranged on the clamping pool, and the clamping pool is arranged on the clamping pool in a matched mode, and is arranged on the clamping pool;
the convex shaft comprises a first convex shaft part connected with the pressing plate and a second convex shaft part arranged above the first convex shaft part, the outer diameter of the second convex shaft part is smaller than that of the first convex shaft part, and the joint of the first convex shaft part and the second convex shaft part is in inclined plane smooth transition;
the sleeve shaft comprises a main shaft and an outer ring fixing ring sleeved on the periphery of the main shaft, the upper end of the main shaft is connected with the rotating shaft through the hollow sleeve module, the main shaft is connected with the rotating shaft through a bearing assembly, so that the main shaft is not rotated when the rotating shaft rotates, the main shaft is sleeved on the periphery of the sliding thimble, the lower end of the main shaft is connected with the compression end cover, and the sleeve shaft is connected with the sliding thimble through a clamping piece structure; the clamping piece structure comprises a bolt head, a first clamping piece, a second clamping piece and an elastic element, wherein the bolt head is arranged on the outer ring fixing ring, the elastic element is arranged in the bolt head, the first clamping piece is arranged inside the sliding thimble, a chute is arranged on the protruding shaft, the end part of the first clamping piece is matched with the chute, the second clamping piece is arranged between the elastic element and the first clamping piece, one end of the second clamping piece can extend into the bolt head to form abutting joint with the elastic element, the other end of the second clamping piece can extend into the sliding thimble to form abutting joint with the first clamping piece, and three groups of clamping piece structures are arranged along the circumferential direction of the sliding thimble;
when external force drives the whole force application compression patch of the underwater welding repair device and the bottom surface and the wall surface of the spent fuel pool to be repaired, a reaction force acts on the compression patch, a gap is reserved between the second protruding shaft part and the bottom of the rotating shaft, when the reaction force acts on the compression patch, the compression patch and the protruding shaft on the compression patch move upwards, at the moment, the inclined surface at the joint of the first protruding shaft part and the second protruding shaft part can support the clamping part structure to move outwards, the first clamping part is always matched with the sliding grooves on the first protruding shaft part and the second protruding shaft part, and the second clamping part can be separated from the sliding thimble along with the upward movement of the protruding shaft; when the second clamping piece is separated from the sliding thimble, the sliding thimble can move upwards under the acting force of the thimble spring below the sliding thimble, and the sliding thimble moves upwards to drive the clamping jaw module to move upwards together so as to release the grabbing action of the clamping jaw module on the patch.
2. The underwater welding repair device for a spent fuel pool according to claim 1, wherein the power transmission structure comprises a power structure and a transmission structure, wherein the power structure is connected with the transmission structure, the transmission structure is mounted on the gas-electric slip ring structure and is connected with the rotating shaft, and the power structure can drive the rotating shaft to rotate through the transmission structure.
3. The underwater welding repair device for the spent fuel pool according to claim 2, wherein the transmission structure is a gear engagement structure and comprises a first gear and a second gear, a first through hole allowing an output shaft of the power structure to pass through is formed in the first gear, the output shaft of the power structure can drive the first gear to rotate, the second gear is engaged with the first gear, a second through hole allowing the rotating shaft to pass through is formed in the second gear, and the second gear can drive the rotating shaft to rotate.
4. The underwater welding repair device for a spent fuel pool according to claim 2, wherein the gas-electric slip ring structure comprises a slip ring support and a gas-electric slip ring installed on the slip ring support, the gas-electric slip ring is installed below the slip ring support, through holes allowing the rotating shaft to pass through are formed in the gas-electric slip ring and the slip ring support, the power structure is fixed below the slip ring support, the transmission structure is installed above the slip ring support, and the slip ring support is installed inside the drainage cover through a support connection structure.
5. The underwater welding repair device for a spent fuel pool according to claim 4, wherein the drainage cover comprises a top plate and a side plate, and the side plate is connected with the top plate and is surrounded into a square structure with an open bottom; the support connection structure comprises a connection support rod and a connection bolt, wherein the connection support rod is fixed above the slip ring support, mounting holes corresponding to the connection support rods in number and position are formed in the top plate, and the end part, far away from the slip ring support, on the connection support rod can penetrate out of the mounting holes and then is matched with the connection bolt.
6. The underwater welding repair device for the spent fuel pool, according to claim 5, wherein the bottom of the side plate is provided with a placement groove, the longitudinal section of the placement groove is in an inverted U shape, and a porous exhaust sealing medium is arranged in the placement groove.
7. The underwater welding repair device for a spent fuel pool according to claim 5, wherein the gas-electric slip ring comprises a first gas-electric slip ring body and a second gas-electric slip ring body, the first gas-electric slip ring body and the surface of the slip ring support, which is away from the top plate, form a fixed connection, the second gas-electric slip ring body is arranged at the end part of the first gas-electric slip ring body, which is far away from the slip ring support, the second gas-electric slip ring body is connected with the rotating shaft, the rotating shaft can drive the second gas-electric slip ring body to synchronously rotate, a stator inlet hole and a stator inlet are arranged on the first gas-electric slip ring body, and a rotor outlet hole and a rotor outlet are arranged on the second gas-electric slip ring body.
8. The underwater welding repair device for a spent fuel pool according to claim 1, wherein the welding gun structure comprises a welding gun support, a wire feeding pipe, a welding gun and a waterproof camera part, the welding gun support is used for placing the welding gun and is fixedly connected with the rotating shaft, the waterproof camera part is installed on the welding gun support, a wire feeding bent pipe is connected to the welding gun, a wire feeding pipe channel allowing the wire feeding pipe to penetrate is formed in the rotating shaft, a pipe inlet communicated with the wire feeding pipe channel is formed in the top of the rotating shaft, a pipe outlet communicated with the wire feeding pipe channel is formed in the side portion of the rotating shaft, and the wire feeding pipe can be connected into the inner cavity of the drain cover from the outside of the drain cover and extends out of the pipe outlet to be connected with the wire feeding bent pipe after extending into the wire feeding pipe channel through the pipe inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211070127.1A CN115430882B (en) | 2022-09-02 | 2022-09-02 | Underwater welding repair device for spent fuel pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211070127.1A CN115430882B (en) | 2022-09-02 | 2022-09-02 | Underwater welding repair device for spent fuel pool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115430882A CN115430882A (en) | 2022-12-06 |
| CN115430882B true CN115430882B (en) | 2023-07-25 |
Family
ID=84246695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211070127.1A Active CN115430882B (en) | 2022-09-02 | 2022-09-02 | Underwater welding repair device for spent fuel pool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115430882B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB596959A (en) * | 1944-10-20 | 1948-01-14 | Linde Air Prod Co | Improvements relating to multi-electrode welding |
| GB1301199A (en) * | 1970-03-26 | 1972-12-29 | Walker Ltd Thomas | Clenching machine for attaching garment fasteners |
| JPH10272522A (en) * | 1997-03-31 | 1998-10-13 | Topy Ind Ltd | Automatic clamp/unclamp device of rotary die |
| JP2008188650A (en) * | 2007-02-06 | 2008-08-21 | Hitachi-Ge Nuclear Energy Ltd | Underwater welding equipment |
| CN101758322A (en) * | 2008-12-25 | 2010-06-30 | 北京石油化工学院 | Underwater remote-control welding system |
| CN101767244A (en) * | 2008-12-31 | 2010-07-07 | 北京石油化工学院 | Full-automatic underwater welding method |
| CN107718046A (en) * | 2017-10-24 | 2018-02-23 | 中广核研究院有限公司 | For the robot of Underwater Welding, robot system and operational method |
| CN108942043A (en) * | 2018-08-13 | 2018-12-07 | 芜湖鼎瀚再制造技术有限公司 | A kind of workpiece reparation fixed point clamping welding equipment |
| CN110238515A (en) * | 2019-07-17 | 2019-09-17 | 上海核工程研究设计院有限公司 | A kind of Spent Fuel Pool underwater laser soldering test device and test method |
| CN111014936A (en) * | 2019-11-16 | 2020-04-17 | 李冬林 | Automobile wheel friction welding device |
| CN111174066A (en) * | 2020-01-21 | 2020-05-19 | 深圳市道通科技股份有限公司 | Wheel clamping device |
| CN113146078A (en) * | 2021-04-12 | 2021-07-23 | 华中科技大学 | Bubble observation and elimination device and method for laser underwater processing |
-
2022
- 2022-09-02 CN CN202211070127.1A patent/CN115430882B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB596959A (en) * | 1944-10-20 | 1948-01-14 | Linde Air Prod Co | Improvements relating to multi-electrode welding |
| GB1301199A (en) * | 1970-03-26 | 1972-12-29 | Walker Ltd Thomas | Clenching machine for attaching garment fasteners |
| JPH10272522A (en) * | 1997-03-31 | 1998-10-13 | Topy Ind Ltd | Automatic clamp/unclamp device of rotary die |
| JP2008188650A (en) * | 2007-02-06 | 2008-08-21 | Hitachi-Ge Nuclear Energy Ltd | Underwater welding equipment |
| CN101758322A (en) * | 2008-12-25 | 2010-06-30 | 北京石油化工学院 | Underwater remote-control welding system |
| CN101767244A (en) * | 2008-12-31 | 2010-07-07 | 北京石油化工学院 | Full-automatic underwater welding method |
| CN107718046A (en) * | 2017-10-24 | 2018-02-23 | 中广核研究院有限公司 | For the robot of Underwater Welding, robot system and operational method |
| CN108942043A (en) * | 2018-08-13 | 2018-12-07 | 芜湖鼎瀚再制造技术有限公司 | A kind of workpiece reparation fixed point clamping welding equipment |
| CN110238515A (en) * | 2019-07-17 | 2019-09-17 | 上海核工程研究设计院有限公司 | A kind of Spent Fuel Pool underwater laser soldering test device and test method |
| CN111014936A (en) * | 2019-11-16 | 2020-04-17 | 李冬林 | Automobile wheel friction welding device |
| CN111174066A (en) * | 2020-01-21 | 2020-05-19 | 深圳市道通科技股份有限公司 | Wheel clamping device |
| CN113146078A (en) * | 2021-04-12 | 2021-07-23 | 华中科技大学 | Bubble observation and elimination device and method for laser underwater processing |
Non-Patent Citations (2)
| Title |
|---|
| ZDB-45型带式输送机用断带保护装置及其在更换改向滚筒中的应用;刘旭明;王海斌;原磊明;李允旺;田丰;赵德龙;周甲;;煤矿机械(第12期);208-210 * |
| 燃料组件修复系统工作平台轻量化设计;刘晓松;;机械与电子(第02期);10-12 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115430882A (en) | 2022-12-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11205522B2 (en) | Apparatus and method to remotely inspect piping and piping attachment welds | |
| EP2937171B1 (en) | Water jet peening apparatus and water jet peening method | |
| CN115430882B (en) | Underwater welding repair device for spent fuel pool | |
| US8687758B2 (en) | Method for managing internal equipment in reactor pressure vessel and apparatus thereof | |
| JP6109510B2 (en) | Abutment repair method and reactor vessel | |
| CN211728994U (en) | Heat transfer pipe overhauls equipment mounting tool | |
| WO2014104030A1 (en) | Pipe base repair method and nuclear reactor vessel | |
| CN111397427B (en) | Vertical tube sheet positioner mounting device of heat exchanger | |
| CN215208344U (en) | Mounting tool for heat transfer pipe inspection positioner | |
| US20160293280A9 (en) | Crdm internal hydraulic connector | |
| CN209909302U (en) | Mechanical jacking transition pipe for large-diameter K2 type nodular cast iron pipe | |
| CN110327683B (en) | Nuclear power station pool filter screen and dismounting method thereof | |
| CN209674891U (en) | A kind of nuclear safety level-one component bolt automatic checking device | |
| JP3514931B2 (en) | Jet pump clamp device and its handling device | |
| JP6029466B2 (en) | Abutment repair method and reactor vessel | |
| CN209820246U (en) | Installation device for vertical tube plate positioner of heat exchanger | |
| EP1078375B1 (en) | Canopy seal clamp assembly and method of installation | |
| CN219975745U (en) | Connection structure of winding structure wall | |
| CN219224052U (en) | Stainless steel pool tube sheet welded joint leakage detection sealing device | |
| JP3425217B2 (en) | Sealing device for repairing pressure vessel penetration housing | |
| CN114684762B (en) | Heat transfer pipe inspection locator mounting tool | |
| CN220016503U (en) | Hydrogen energy engine cooling pipe | |
| CN210572366U (en) | Speed measuring device for water conservancy and hydropower | |
| JPH02118499A (en) | Repairing method for neutron flux monitor housing | |
| CN111425268B (en) | Installation method of double-elastic-base steam turbine with independently supported inner cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230922 Address after: 102600 Beijing Daxing District Huangcun Qingyuan Road No. 19 Patentee after: BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: 102600 No.19 Qingyuan North Road, Daxing District, Beijing Patentee before: BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY |