CN114101951A

CN114101951A - Liquid pool side wall welding device and welding method

Info

Publication number: CN114101951A
Application number: CN202111298730.0A
Authority: CN
Inventors: 杨涛; 简海林; 李青华; 孙浈; 曾道英; 俞照辉
Original assignee: State Nuclear Power Plant Service Co Ltd
Current assignee: State Nuclear Power Plant Service Co Ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-03-01
Also published as: WO2023077974A1; ZA202310617B

Abstract

The application provides a liquid pool side wall welding device and a welding method. The cabin body structure of the liquid pool side wall welding device comprises a preparation cabin and a liquid drainage cabin which are horizontally arranged, wherein the preparation cabin is communicated with the liquid drainage cabin through an operation window, welding equipment is arranged in the preparation cabin, and the liquid drainage cabin is provided with an opening which is in sealed contact with the side wall. The sealing plate can automatically close or open the operation window to separate or communicate the preparation cabin and the drainage cabin. The position maintaining structure is used for keeping the cabin body structure at a preset depth in the liquid pool, so that the opening is sealed and attached to the side wall. The liquid discharging port of the liquid discharging structure is arranged at the bottom of the liquid discharging cabin, and the gas supply device is used for conveying gas to the liquid discharging cabin to empty liquid when the opening is sealed and attached with the side wall and the sealing plate closes the operation window. And then, the welding equipment enters the drainage cabin from the operation window to weld or repair the side wall. The technical scheme of this application can be under the state of liquid is deposited in the liquid pond, constructs local dry-type environment at the lateral wall, is convenient for carry out lateral wall welding and restoration.

Description

Liquid pool side wall welding device and welding method

Technical Field

The application relates to the technical field of welding equipment in a liquid pool, in particular to a welding device and a welding method for a side wall of the liquid pool.

Background

In the industrial field, there are many metal structure water tanks for storing liquid, and the metal side walls of the water tanks are easy to crack, pitting corrosion, stress corrosion and other defects due to long-term use in complicated working conditions and environments. These defects can lead to reduced load bearing capacity of the structure, leakage of stored liquid, and even catastrophic rupture. Therefore, when the side wall of the liquid pool rigid structure is found to have defects, the defects of the side wall need to be welded and repaired.

Conventional repair methods typically drain the pool of liquid entirely and perform weld repairs in a completely dry environment. However, some liquid pools have special properties of stored liquid, which cannot be directly emptied, and the liquid transfer also causes huge economic cost, for example, a spent fuel pool in a nuclear power plant, in order to ensure the normal performance of cooling and other functions, the best method is to weld and repair the side wall without emptying the spent fuel pool.

Therefore, how to design a welding device capable of welding the inner side wall of the liquid tank in a liquid storage state becomes a hot spot of research in the industry.

Disclosure of Invention

An object of the embodiment of the present application is to provide a liquid pool side wall welding device, which can construct a local dry environment on the side wall in a liquid pool liquid storage state, so as to perform pool side wall welding and repairing.

A second object of an embodiment of the present application is also to provide a liquid pool side wall welding method using the above liquid pool side wall welding apparatus.

In a first aspect, a liquid pool side wall welding device is provided and is characterized by comprising a cabin structure, a sealing plate, a position maintaining structure and a liquid discharging structure. The cabin body structure comprises a preparation cabin and a liquid drainage cabin which are horizontally arranged, the preparation cabin is communicated with the liquid drainage cabin through an operation window, welding equipment is arranged in the preparation cabin, and the liquid drainage cabin is provided with an opening which is in sealed contact with the side wall of the liquid pool. The sealing plate may automatically close the operation window to separate the preparation chamber and the drain chamber, or may automatically open the operation window to communicate the preparation chamber and the drain chamber. The position maintaining structure is connected with the cabin body structure and is used for keeping the cabin body structure at a preset depth in the liquid pool and enabling the opening to be sealed and attached to the side wall of the liquid pool. The liquid discharging structure comprises a liquid discharging port and an air supply device, the liquid discharging port is arranged at the bottom of the liquid discharging cabin, and the air supply device is used for conveying air into the liquid discharging cabin and emptying liquid in the liquid discharging cabin when the opening is sealed and attached to the side wall of the liquid pool and the sealing plate closes the operation window. And after the liquid in the drainage cabin is drained, the welding tool of the welding equipment enters the drainage cabin through the operation window and performs welding and/or repairing on the preset position of the side wall.

In one embodiment, the position maintaining structure comprises: the traction assembly is connected with the upper part of the cabin structure and is used for adjusting the spatial position of the cabin structure in the liquid pool; and the adsorption piece is arranged around the opening of the liquid drainage cabin and is used for adsorbing the side wall and enabling the opening of the liquid drainage cabin to be hermetically attached to the side wall of the liquid pool.

In an embodiment, the position maintaining structure further comprises a propelling component, which is arranged at the periphery of the cabin structure and is used for attaching the adsorbing component to the side wall of the liquid pool.

In an implementable scheme, the position holding structure comprises a mechanical arm module, the mechanical arm module is provided with a clamping part and a base, the base is arranged outside the liquid pool, the clamping part is connected with the cabin body structure, and the mechanical arm module is used for enabling an opening of the liquid drainage cabin to be hermetically attached to the side wall.

In an embodiment, the drainage port is provided with a one-way valve which only allows liquid to be transported from the inside to the outside of the drainage chamber.

In an implementation scheme, the device further comprises a hot air device, and the hot air device is communicated with the liquid drainage cabin and is used for blowing hot air into the liquid drainage cabin.

In an implementable scheme, the cabin further comprises a balancing weight, and the balancing weight is arranged at the bottom, the side face or the upper part of the cabin structure.

In an implementation scheme, the sealing plate comprises a first sealing plate and a second sealing plate, and the first sealing plate and the second sealing plate are respectively and rotatably connected with two side edges of the operation window; when the first sealing plate and the second sealing plate rotate towards the center of the operation window and are contacted and jointed with each other, the operation window is closed.

In an implementation scheme, the welding equipment comprises a first posture adjusting assembly and a second posture adjusting assembly, wherein a switchable polishing tool and a fixing tool are installed on the first posture adjusting assembly, a welding gun is installed on the second posture adjusting assembly, and the polishing tool, the fixing tool and the welding gun enter the liquid discharge cabin through an operation window to weld and/or repair a preset position of the side wall after the liquid discharge cabin is emptied.

According to the second aspect of the application, there is also provided a liquid pool side wall welding method, using the liquid pool side wall welding device in the above scheme, including the following steps:

s1: before the welding device enters the liquid pool, the sealing plate is in a state of closing the operation window, and the preparation cabin and the liquid drainage cabin are completely isolated, so that the preparation cabin is in a sealed state;

s2: after the position holding structure aligns the opening of the liquid drainage cabin to the position to be welded on the side wall of the liquid pool, the opening of the liquid drainage cabin is hermetically attached to the side wall;

s3: the gas supply device of the liquid discharge structure continuously conveys gas into the liquid discharge cabin, and liquid in the liquid discharge cabin is gradually discharged to the outer side of the liquid discharge cabin through the liquid discharge port;

s4: after the liquid in the liquid discharge cabin is emptied, the sealing plate opens the operation window;

s5: the welding equipment carries out welding and/or repairing operation on the position, needing to be welded, of the side wall of the liquid pool through the operation window;

s6: after the welding and/or repairing operation is completed, the welding equipment is withdrawn from the operation window, the sealing plate closes the operation window, and the whole device is withdrawn from the water pool.

Compared with the prior art, the beneficial effect of this application is:

the utility model provides a liquid pond lateral wall welding set during operation need not the liquid in the evacuation liquid pond, but through the welding position at the liquid pond lateral wall establish local dry-type welding space, makes the liquid pond still can carry out the welding or the repair operation of lateral wall under the state of depositing liquid to basically not influence the normal work in liquid pond, can reduce economic cost by a wide margin.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic view of an overall structure of a liquid pool side wall welding device according to an embodiment of the application;

FIG. 2 is a schematic view illustrating a welding device for welding a side wall of a liquid pool to the side wall according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram illustrating drainage of a drainage chamber in a pool sidewall welding apparatus according to an embodiment of the present disclosure;

FIG. 4 is a diagram illustrating an opened state of a sealing plate of a welding device for a side wall of a liquid pool according to an embodiment of the present application;

FIG. 5 is a schematic diagram illustrating a grinding defect location of a liquid pool side wall welding device according to an embodiment of the application;

FIG. 6 is a schematic diagram illustrating a weld setup for spot welding of patch panels of a liquid pool sidewall in accordance with an exemplary embodiment of the present disclosure;

FIG. 7 is a schematic diagram illustrating a patch welding of a liquid pool side wall welding apparatus according to an embodiment of the present disclosure;

FIG. 8 is a flow chart illustrating a method for welding the side walls of a liquid pool according to an embodiment of the present application.

In the figure: 10. a cabin structure; 11. preparing a cabin; 111. a first attitude adjustment assembly; 1111. polishing the tool; 1112. a fixing tool; 112. a second attitude adjustment assembly; 1121. a welding gun; 12. a drainage tank; 121. opening the mouth; 20. operating a window; 30. a sealing plate; 31. a first sealing plate; 32. a second sealing plate; 40. a position maintaining structure; 41. a traction assembly; 42. an adsorbing member; 43. a propulsion assembly; 50. a liquid discharge structure; 51. a liquid discharge port; 52. an air intake passage; 60. a balancing weight; 100. plate supplementing; S1-S6.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

According to a first aspect of the present application, referring to fig. 1, there is first provided a liquid pool side wall welding apparatus comprising a tank structure 10, a sealing plate 30, a position maintaining structure 40 and a drainage structure 50. The tank structure 10 comprises a preparation tank 11 and a drainage tank 12 arranged horizontally, the preparation tank 11 and the drainage tank 12 are communicated through an operation window 20, welding equipment is arranged in the preparation tank 11, and the drainage tank 12 is provided with an opening 121 for being in sealing contact with the side wall of the liquid pool. The sealing plate 30 may automatically close the operation window 20 to separate the preparation chamber 11 and the drain chamber 12, or may automatically open the operation window 20 to communicate the preparation chamber 11 and the drain chamber 12. The position maintaining structure 40 is connected to the chamber structure 10 and is used to maintain the chamber structure 10 at a predetermined depth in the liquid pool, and the opening 121 is sealed to the side wall of the liquid pool. The drainage structure 50 comprises a drainage port 51 and an air supply device, wherein the drainage port 51 is arranged at the bottom of the drainage tank 12, and the air supply device is used for supplying air into the drainage tank 12 and draining the liquid in the drainage tank 12 when the opening 121 is hermetically attached to the side wall of the liquid pool and the sealing plate 30 closes the operation window 20. After the liquid in the drainage chamber 12 is drained, the welding tool of the welding device enters the drainage chamber 12 through the operation window 20 and performs welding and/or repairing on the preset position of the side wall.

When the welding device for the side wall of the liquid pool works, firstly, before the welding device enters the liquid pool, the sealing plate 30 is in a state of closing the operation window 20, the preparation cabin 11 and the drainage cabin 12 are completely isolated, and the preparation cabin 11 is in a sealed state. Then, after the position maintaining structure 40 aligns the operation window 20 with the position where the side wall is to be welded, the open end 121 of the drainage tank 12 is sealingly attached to the side wall, see fig. 2. Next, the gas supply device of the drainage structure 50 continuously delivers gas into the drainage chamber 12, and gradually discharges the liquid in the drainage chamber 12 to the outside of the drainage chamber 12 through the liquid discharge port 51, referring to fig. 3, until the liquid in the drainage chamber 12 is emptied, the inner cavity of the drainage chamber 12 where the liquid is emptied is the local dry environment, so far, the local dry welding environment at the side wall of the liquid pool is established, which provides convenience for the next welding. Finally, the sealing plate 30 opens the operation window 20, and referring to fig. 4, the welding apparatus performs a welding or weld repair operation on the side wall at a position to be welded through the operation window 20. It can be seen that, when the liquid pool side wall welding device works, the liquid in the liquid pool does not need to be emptied, but the local dry-type welding space is established at the welding position of the side wall of the liquid pool, so that the liquid pool can still carry out the welding or repairing operation of the side wall under the liquid storage state, see fig. 5-7, thereby basically not influencing the normal work of the liquid pool.

It should be noted that the left-right separation design of the drainage tank 12 and the preparation tank 11 is not only beneficial for protecting the welding equipment in the preparation tank 11, but also beneficial for establishing the local dry environment in the drainage tank 12. The cabin body structure 10 is in a sealed state before entering the liquid pool and emptying the liquid in the liquid drainage cabin 12, so that the internal welding equipment is well protected, after the liquid in the liquid drainage cabin 12 is emptied, a welding tool of the welding equipment in the preparation cabin 11 enters the liquid drainage cabin 12 for welding operation, all elements in the preparation cabin 11 cannot be contacted with water, and the reliability of underwater operation of all equipment elements is ensured.

In one embodiment, referring to fig. 1, the position maintaining structure 40 includes a pulling assembly 41 and a suction member 42. The traction assembly 41 is connected to the upper portion of the tank structure 10 for adjusting the spatial position of the tank structure 10 within the liquid bath. The adsorption member 42 is arranged around the opening 121 of the liquid discharge cabin 12, and the adsorption member 42 is used for adsorbing the side wall and enabling the opening 121 of the liquid discharge cabin 12 to be tightly attached to the side wall of the liquid pool. The traction component 41 can pull the cabin structure 10, so that the cabin structure 10 enters the liquid pool, and keeps a certain height in the liquid pool, and meanwhile, the cabin structure 10 can be pulled to move to the position of the side wall in the liquid pool, and then after the opening 121 is attached to the side wall, the adsorption part 42 is tightly attached to the side wall and firmly adsorbs the side wall, so that the opening 121 and the side wall form a sealing attachment, liquid immersion in the liquid discharge process of the liquid discharge cabin 12 is prevented, the liquid discharge effect is influenced, and the dry environment is kept after the subsequent liquid discharge cabin 12 discharges water.

In one embodiment, the traction assembly 41 may be towed using a hoist or hoist coupled to a wire rope.

In one embodiment, the suction member 42 comprises a plurality of vacuum cups disposed around the periphery of the drainage chamber 12 and evenly distributed around the opening 121 of the drainage chamber 12, the suction surface of the vacuum cups facing the opening 121, and the vacuum cups suction the side walls and seal the opening 121 against the side walls when the vacuum cups are in operation. A water ring vacuum pump may be employed to provide vacuum suction to the vacuum chuck.

In one embodiment, the suction member 42 comprises a plurality of electromagnetic suction cups, the plurality of electromagnetic suction cups are disposed on the periphery of the drainage tank 12 and are evenly distributed around the opening 121 of the drainage tank 12, the suction surfaces of the electromagnetic suction cups are in the same orientation as the opening 121, and when the electromagnetic suction cups are operated, the electromagnetic suction cups suck the side walls and make the opening 121 tightly attached to the side walls.

In one embodiment, the sealing member is disposed at the position where the opening 121 of the drainage chamber 12 is attached to the side wall, and the sealing ring is disposed at the position where the sealing plate 30 is engaged with the operation window 20. The sealing member can ensure that the opening 121 is tightly attached to the side wall of the liquid pool under the condition that the side wall of the opening 121 has undulation. The sealing ring ensures that the sealing plate 30 forms a sealing joint with the operation window 20 when the whole welding device enters water, and ensures that liquid cannot enter the preparation cabin 11 through the operation window 20 to cause corrosion damage to welding equipment and the like in the preparation cabin 11.

In one embodiment, referring to FIG. 1, the position maintaining structure 40 further comprises a propelling assembly 43, the propelling assembly 43 being disposed at the periphery of the tank structure 10 for attaching the suction member 42 to the side wall of the liquid pool. The pushing assembly 43 can make up for the deficiency of the pulling assembly 41, and when the pulling assembly 41 cannot bring the opening 121 as close as possible to the side wall, the pushing assembly 43 works to further push the opening 121 into the side wall and make the suction member 42 adhere to the side wall. The propulsion assembly 43 may be an underwater propulsion device such as a propeller to achieve lateral movement of the nacelle structure 10.

In one embodiment, the position maintaining structure 40 comprises a robotic arm module, the robotic arm module is provided with a clamping portion and a base, the base is disposed outside the liquid pool, the clamping portion is connected with the chamber body structure 10, and the robotic arm module is used for sealing the opening 121 of the drainage chamber 12 against the side wall. The position maintaining structure 40 may be a multi-degree-of-freedom module, a multi-degree-of-freedom mechanical arm, or the like, to change the position of the cabin structure 10 in the liquid pool.

In one embodiment, the drain 51 is provided with a one-way valve that only allows liquid to be transported from the inside to the outside of the drain compartment 12. The check valve ensures that no backflow occurs after the liquid in the liquid discharge chamber 12 is emptied.

In one embodiment, a hot air device is further included, and the hot air device is communicated with the drainage chamber 12 and is used for blowing hot air into the drainage chamber 12. After the air supply device is used for inflating the liquid in the liquid drainage cabin 12 to drain the liquid in the liquid drainage cabin 12, partial residual liquid may remain at the bottom of the liquid drainage cabin 12, and the hot air device can blow hot air into the liquid drainage cabin 12 to dry the residual liquid, so that the dry effect of the local dry environment of the underwater side wall is further improved, and the welding quality is improved. The tank structure 10 may be provided with a gas discharge port which is in communication with the air outside the liquid bath for discharging excess gas inside the tank structure 10 to the outside.

In one embodiment, referring to fig. 1-7, the drain 50 further includes an air inlet passage 52, the air inlet passage 52 being used to direct air from the air supply and hot air supply to the drain chamber 12. The air intake passage 52 is used to connect an air supply device and a hot air device. The air inlet passage 52 has two purposes, so that the number of the interfaces is reduced, and the leakage risk is reduced. When the liquid is discharged from the liquid discharge cabin 12, the hot air device does not work, the air supply device conveys air into the liquid discharge cabin 12 through the air inlet channel 52, and after the liquid in the liquid discharge cabin 12 is discharged, the hot air device works to convey hot air into the liquid discharge cabin 12 through the air inlet channel 52 to dry the residual liquid in the liquid discharge cabin 12. The hot air supply device may be implemented by providing a heater on a line from the air supply device to the intake passage 52, or by using a device that can separately generate hot air and the air supply device in parallel with the intake passage 52.

In one embodiment, the inlet passage 52 is provided with a one-way valve or an electrically operated valve to ensure that gas can only be delivered from the inlet passage 52 into the discharge chamber 12. The air inlet passage 52 can also be provided with a multi-way electromagnetic valve to realize the gas delivery switching of the hot air device and the air supply device.

In one embodiment, referring to fig. 1, a weight 60 is further included, and the weight 60 is disposed at the bottom, side or upper portion of the cabin structure 10. The weight 60 serves two purposes, on the one hand, the weight 60 increases the overall weight of the welding device, so that the welding device can sink into the liquid pool against the buoyancy of the pool. On the other hand, the weight 60 is disposed on the cabin structure 10 to help maintain the balance of the welding device in the liquid pool.

In one embodiment, referring to fig. 1-7, the seal plate 30 includes a first seal plate 31 and a second seal plate 32, the first seal plate 31 and the second seal plate 32 being rotatably coupled to both sides of the access window 20, respectively; the first and

second seal plates

31 and 32 close the operation window 20 when they rotate toward the center of the operation window 20 and come into contact with each other. The two-way opening and closing of the first sealing plate 31 and the second sealing plate 32 can increase the opening degree of the operation window 20, the length of the first sealing plate 31 and the length of the second sealing plate 32 are shortened, the thickness of the drainage cabin 12 is correspondingly reduced, the size of the drainage cabin 12 is smaller, and the drainage pressure is reduced. The first sealing plate 31 and the second sealing plate 32 may be driven to rotate by hydraulic pull rods, or may be driven to rotate by a motor in cooperation with a connecting rod structure, or may be provided with a power device such as a motor for driving rotation at a rotary joint.

In one embodiment, referring to fig. 1-7, the welding apparatus includes a first attitude adjustment assembly 111 and a second attitude adjustment assembly 112, the first attitude adjustment assembly 111 is provided with a switchable grinding tool 1111 and a fixing tool 1112, the second attitude adjustment assembly 112 is provided with a welding gun 1121, and the grinding tool 1111, the fixing tool 1112 and the welding gun 1121 enter the drainage tank 12 through the operation window 20 to weld and/or repair a predetermined position of the sidewall after the drainage tank 12 is drained. The first attitude adjustment assembly 111 and the second attitude adjustment assembly 112 are used for clamping a tool related to welding to perform a welding operation. Assuming that only the side wall is required to be welded, the second attitude adjustment assembly 112 is configured to change the attitude to weld the welding gun 1121 on the welding position of the side wall through the operation window 20. Assuming that the sidewall needs to be repaired, the first posture adjustment assembly 111 generally operates by first polishing the damaged portion with a polishing tool 1111, then switching to a fixing tool 1112, the fixing tool 1112 holding the patch 100 to the damaged portion, and finally operating the second posture adjustment assembly 112 to perform spot welding and fixing on the patch 100 with a welding gun 1121, and then withdrawing the fixing tool 1112 to perform overall welding and repairing on the patch 100 with the welding gun 1121. The first attitude adjustment assembly 111 and the second attitude adjustment assembly 112 are matched with each other so as to better complete different working processes such as welding or repairing.

The first attitude adjustment assembly 111 and the second attitude adjustment assembly 112 may be a multi-degree-of-freedom robot arm, a multi-degree-of-freedom lead screw, a synchronous belt module, or the like. The patch 100 dimensions may be customized according to defect type, size, and depth.

In one embodiment, a water level detecting sensor may be further disposed in the draining compartment 12, and the water level detecting sensor is disposed along the inner side of the draining compartment 12 and close to the opening 121 for detecting whether the liquid in the draining compartment 12 is empty.

In one embodiment, a humidity sensor may be further disposed in the draining chamber 12, and the humidity sensor is used for detecting the humidity in the draining chamber 12 and providing a start and stop signal for the hot air device, so as to control the humidity environment in the draining chamber 12 and ensure the welding quality.

In one embodiment, a camera may be disposed within the preparation chamber 11 or mounted at the end of the movement of the first and second

attitude adjustment assemblies

111 and 112 to facilitate monitoring of the internal environment.

In one embodiment, the welding device further comprises a controller and a remote controller, the remote controller can be a mobile phone, a computer or other equipment capable of sending or receiving signals, the remote controller and the controller perform information interaction, and the controller controls the actions of the sealing plate 30, the air supply device, the hot air device, the adjusting component, the switch of the welding gun 1121 and the like in the welding device according to information instructions. Through welding remote control under water, can be in the steel structure pond operation of complex environment, especially the inaccessible underwater environment of operation personnel.

According to the second aspect of the present application, there is also provided a liquid pool side wall welding method, using the liquid pool side wall welding device in the above technical solution, referring to fig. 8, including the following steps:

s1: before the welding device enters the liquid pool, the sealing plate 30 is in a state of closing the operation window 20, completely isolating the preparation chamber 11 and the drainage chamber 12, and enabling the preparation chamber 11 to be in a sealed state.

In step S1, if the side wall is welded, the welding gun 1121 needs to be installed on the second attitude adjusting assembly 112, if the side wall is repaired by welding, the grinding tool 1111 and the fixing tool 1112 need to be installed on the first attitude adjusting assembly 111, and the required patch 100 or patch is installed on the fixing tool 1112.

S2: after the position holding structure 40 aligns the opening 121 of the drainage tank 12 with the position to be welded on the side wall of the liquid pool, the opening 121 of the drainage tank 12 is tightly attached to the side wall.

S3: the gas supply device of the drainage structure 50 continuously supplies gas into the drainage chamber 12, and gradually discharges the liquid in the drainage chamber 12 to the outside of the drainage chamber 12 through the drainage port 51.

S4: after the liquid in the drainage tank 12 is drained, the sealing plate 30 opens the operation window 20.

S5: the welding equipment performs welding and/or repair operations on the positions of the side walls of the liquid pool to be welded through the operation window 20.

In step S5, if the repair work is performed, first, the defective position is ground using the grinding tool 1111 (as shown in fig. 5). Then, the patch 100 is positioned with respect to the fixing tool 1112, and the welding gun 1121 spot-welds the periphery of the patch 100 (as shown in fig. 6), thereby fixing the patch 100. Finally, the grinding tool 1111 and the fixing tool 1112 are moved away from the operation window 20, out of the region to be welded, to the edge of the welding apparatus, and the welding torch 1121 performs the final welding of the patch 100 (as shown in fig. 7).

S6: after the welding and/or repair operation is completed, the welding equipment is withdrawn from the access window 20, the sealing plate 30 closes the access window 20, and the entire assembly is withdrawn from the water bath.

In step S6, before the welding device is removed from the side wall of the water tank, or after the welding is completed, the entire device is cooled to some extent while waiting for the welding position, and then slowly removed from the water tank.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid pool side wall welding device, comprising:

the tank body structure (10) comprises a preparation tank (11) and a liquid drainage tank (12) which are horizontally arranged, the preparation tank (11) is communicated with the liquid drainage tank (12) through an operation window (20), welding equipment is arranged in the preparation tank (11), and the liquid drainage tank (12) is provided with an opening (121) which is used for being in sealing contact with the side wall of the liquid pool;

a sealing plate (30) which can automatically close the operation window (20) to separate the preparation chamber (11) and the drainage chamber (12) or can automatically open the operation window (20) to communicate the preparation chamber (11) and the drainage chamber (12);

a position maintaining structure (40) connected to the tank structure (10) for maintaining the tank structure (10) at a predetermined depth in the liquid pool and for sealing the opening (121) against the side wall of the liquid pool;

the liquid discharging structure (50) comprises a liquid discharging port (51) and an air supply device, the liquid discharging port (51) is arranged at the bottom of the liquid discharging cabin (12), and the air supply device is used for conveying air into the liquid discharging cabin (12) and emptying the liquid in the liquid discharging cabin (12) when the opening (121) is hermetically attached to the side wall of the liquid pool and the sealing plate (30) closes the operation window (20);

the welding tool of the welding device enters the drainage tank (12) from the operation window (20) after the liquid of the drainage tank (12) is drained, and performs welding and/or repairing on the preset position of the side wall.

2. The liquid pool side wall welding apparatus of claim 1, wherein the position retaining structure (40) comprises:

a traction assembly (41) connected to an upper portion of the tank structure (10) for adjusting the spatial position of the tank structure (10) within the liquid bath;

and the adsorption piece (42) is arranged around the opening (121) of the liquid drainage cabin (12), and the adsorption piece (42) is used for adsorbing the side wall and enabling the opening (121) of the liquid drainage cabin (12) to be hermetically attached to the side wall of the liquid pool.

3. The liquid pool side wall welding apparatus according to claim 2, wherein the position maintaining structure (40) further comprises an urging assembly (43), the urging assembly (43) being disposed at the periphery of the tank structure (10) for attaching the suction member (42) to the liquid pool side wall.

4. The liquid pool side wall welding device according to claim 1, wherein the position holding structure (40) comprises a robot arm module, wherein the robot arm module is provided with a clamping portion and a base, the base is arranged outside the liquid pool, the clamping portion is connected with the cabin body structure (10), and the robot arm module is used for enabling the opening (121) of the liquid discharge cabin (12) to be tightly attached to the side wall.

5. The liquid pool side wall welding device according to any one of claims 1-4, characterized in that the drain port (51) is provided with a one-way valve that only allows liquid to be transported from the inside to the outside of the drain tank (12).

6. The liquid pool side wall welding device according to claim 5, further comprising a hot air device in communication with the drainage tank (12) for blowing hot air into the drainage tank (12).

7. The liquid pool side wall welding device according to any one of claims 1 to 4, further comprising a weight block (60), wherein the weight block (60) is arranged at the bottom, the side or the upper part of the cabin structure (10).

8. The liquid pool side wall welding device according to any one of claims 1-4, wherein the sealing plate (30) comprises a first sealing plate (31) and a second sealing plate (32), the first sealing plate (31) and the second sealing plate (32) being rotatably connected to two sides of the operation window (20), respectively; the first seal plate (31) and the second seal plate (32) close the operation window (20) when they rotate toward the center of the operation window (20) and come into contact with each other.

9. The liquid pool side wall welding device according to any one of claims 1-4, characterized in that the welding equipment comprises a first posture adjustment assembly (111) and a second posture adjustment assembly (112), the first posture adjustment assembly (111) is provided with a switchable grinding tool (1111) and a fixing tool (1112), the second posture adjustment assembly (112) is provided with a welding gun (1121), and the grinding tool (1111), the fixing tool (1112) and the welding gun (1121) enter the drainage tank (12) through the operation window (20) after the drainage tank (12) is drained to weld and/or repair a preset position of the side wall.

10. A liquid pool side wall welding method, characterized in that the liquid pool side wall welding device according to any one of claims 1 to 9 is used, comprising the steps of:

s1: before the welding device enters the liquid pool, the sealing plate (30) is in a state of closing the operation window (20), the preparation cabin (11) and the liquid drainage cabin (12) are completely isolated, and the preparation cabin (11) is in a sealed state;

s2: after the position holding structure (40) aligns the opening (121) of the liquid drainage cabin (12) to the position of the side wall of the liquid pool to be welded, the opening (121) of the liquid drainage cabin (12) is in sealing fit with the side wall;

s3: the gas supply device of the liquid discharging structure (50) continuously conveys gas into the liquid discharging cabin (12), and liquid in the liquid discharging cabin (12) is gradually discharged to the outer side of the liquid discharging cabin (12) through the liquid discharging port (51);

s4: after the liquid in the liquid drainage cabin (12) is drained, the sealing plate (30) opens the operation window (20);

s5: the welding equipment carries out welding and/or repairing operation on the position, needing to be welded, of the side wall of the liquid pool through the operation window (20);

s6: after the welding and/or repair operation is completed, the welding equipment is withdrawn from the operation window (20), the sealing plate (30) closes the operation window (20), and the whole device is withdrawn from the water pool.