Underwater local dry type welding repair tubular structure and construction method thereof

Abstract

The invention discloses an underwater local dry type welding repair tubular structure and a construction method thereof.The underwater local dry type welding repair tubular structure comprises a drainage cover and a drainage cover sealing gasket, the drainage cover sealing gasket is provided with the drainage cover, and the drainage cover is arranged at the to-be-repaired position of a pipe body through the drainage cover sealing gasket; an air inlet pipe is connected to one side of the drainage cover, a drainage pipe is connected to the side, away from the air inlet pipe, of the drainage cover, compressed air is injected into the drainage cover through the air inlet pipe, water in the pipe body is drained out of the drainage pipe, and the to-be-repaired position of the pipe body is welded and repaired. According to the underwater local dry type welding repair tubular structure, various drainage or water pumping schemes are adopted, the purpose of emptying accumulated water in the pipe is achieved, the influence of the accumulated water in the pipe on the underwater welding quality is avoided, the welding quality is improved, the welding repair quality of the structure is improved, and therefore the service life of the structure is prolonged; influence of internal water on welding quality is avoided, and structure repairing quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of underwater welding repair of tubular structures, and in particular relates to an underwater local dry welding repair of a tubular structure and a construction method thereof. Background Art

[0002] When underwater steel structures are damaged and need to be repaired by underwater welding, wet or dry methods are generally used for repair. If the damaged underwater structure is relatively important and needs to continue to serve for several years or even decades, it is necessary to ensure the quality of the underwater welding repair welds and eliminate the influence of water on the quality of underwater welding welds. Generally, dry welding methods with better welding quality are used for repair, and underwater local dry welding is one of them.

[0003] When an underwater tubular steel structure is damaged, if the damaged part penetrates the pipe wall, water will enter the interior of the tubular structure. At this time, if the underwater local dry welding method is used to repair the damaged part, the internal water will seriously affect the quality of the repair weld, especially the quality of the weld root. Therefore, it is necessary to drain the water inside the tubular structure before underwater welding to provide a suitable environment for welding.

[0004] Therefore, it is urgent to design an underwater local dry welding repair tubular structure to solve the above-mentioned problems. Summary of the invention

[0005] In order to solve the technical problem mentioned in the background technology that when repairing damaged parts by the underwater local dry welding method, internal water accumulation will seriously affect the quality of the repaired weld, especially the quality of the weld root, an underwater local dry welding method for repairing tubular structures is provided to solve the damaged parts of underwater tubular steel structures.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the underwater local dry welding repair of tubular structure of the present invention is as follows: An underwater local dry welding repair tubular structure includes a drain cover and a drain cover sealing gasket. A drain cover is arranged on the drain cover sealing gasket. The drain cover is arranged at a position to be repaired on a pipe body through the drain cover sealing gasket. An air intake pipe is connected to one side of the drain cover. A drain pipe is connected to the side of the drain cover away from the air intake pipe. The air intake pipe injects compressed air into the drain cover to discharge water in the pipe body from the drain pipe, so as to weld and repair the position to be repaired on the pipe body.

[0007] Furthermore, the drainage cover sealing gasket is provided with a through hole corresponding to the drainage cover, and the drainage pipe is inserted into the pipe body along the through hole.

[0008] Furthermore, a binding belt is connected to the drain cover, and the binding belt is sleeved on the pipe body to fix the drain cover at the position of the pipe body to be repaired.

[0009] Furthermore, an air inlet hole is provided on the drain cover, and an air inlet pipe is connected to the air inlet hole to inject compressed air into the drain cover.

[0010] Furthermore, a drainage hole is provided on the drainage cover away from the air inlet, a drainage pipe is plugged into the drainage hole, and one end of the drainage pipe is inserted into the drainage hole and extends into the pipe body so that water in the pipe body can be discharged from the drainage pipe.

[0011] Furthermore, the drain cover and the drain cover sealing gasket are both arranged in an arc shape so that the drain cover can be stably arranged on the pipe body.

[0012] A construction method for repairing a tubular structure by underwater local dry welding mainly comprises the following steps: S1. Lay the drainage cover sealing pad on the position to be repaired on the pipe body; S2, the drain cover is in contact with the drain cover sealing pad and fixed to the pipe body by a binding belt; S3, the air inlet pipe injects compressed air into the drain cover, the pressure inside the pipe body increases, and the water is discharged along the drain pipe; S4. After the drainage meets the requirements, seal the drainage pipe to achieve the drainage purpose.

[0013] Furthermore, a one-way valve is arranged at the far end of the position of the pipe body to be repaired, and the air inlet pipe injects compressed air into the drainage cover to block the drainage pipe and discharge the water along the one-way valve.

[0014] Furthermore, a rubber airbag is arranged between the positions to be repaired on both sides of the tube body, and the rubber airbag is fitted to the inner wall of the tube body to prevent water from flowing on both sides of the rubber airbag.

[0015] Furthermore, drainage covers are installed at the positions to be repaired on both sides of the rubber airbag, so as to perform repair treatment on the positions to be repaired simultaneously or sequentially.

[0016] The underwater local dry welding repair tubular structure and the construction method thereof of the present invention have the following advantages: By adopting various drainage or pumping schemes, the purpose of draining the water in the pipe is achieved, avoiding the influence of the water inside the pipe on the underwater welding quality, improving the welding quality, improving the quality of structural welding repair, and thus extending the service life of the structure. When the present application is used for underwater local dry welding repair of tubular structures, the purpose of draining the water inside the tubular structure can be achieved by combining with a drainage cover, thereby avoiding the influence of the internal water on the welding quality and improving the quality of structural repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the damage at various positions of a tubular structure repaired by underwater local dry welding according to the present invention; Figure 2 It is a schematic diagram of the drainage cover structure and internal structure of the underwater local dry welding repair tubular structure of the present invention; Figure 3 It is a schematic diagram of drainage of a one-way valve in a flat welding position for underwater local dry welding repair of a tubular structure according to the present invention; Figure 4 It is a schematic diagram of drainage and pumping of a drainage cover at a flat welding position for underwater local dry welding repair of a tubular structure according to the present invention; Figure 5 It is a schematic diagram of the auxiliary drainage of rubber airbags for repairing two damaged points of a tubular structure by underwater local dry welding according to the present invention.

[0018] Description of the markings in the figure: 1. Pipe body; 2. Drain cover; 3. Drain cover gasket; 4. Air inlet pipe; 5. Drain pipe; 6. Binding belt; 7. Air inlet hole; 8. Drain hole; 9. One-way valve; 10. Rubber airbag; 11. One-way valve installation hole; 12. Water surface inside the pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 To Attachment Figure 5 The invention is described for underwater local dry welding repair of tubular structures.

[0022] like Figures 1 to 3 As shown, the underwater local dry welding repair tubular structure in the present invention includes a drain cover 2 and a drain cover sealing gasket 3, the drain cover 2 is arranged on the drain cover sealing gasket 3, the drain cover 2 is arranged at the position to be repaired of the pipe body 1 through the drain cover sealing gasket 3, one side of the drain cover 2 is connected to an air intake pipe 4, and the side of the drain cover 2 away from the air intake pipe 4 is connected to a drain pipe 5, the air intake pipe 4 injects compressed air into the drain cover 2, and the water in the pipe body 1 is discharged from the drain pipe 5, so as to weld and repair the position to be repaired of the pipe body 1.

[0023] By adopting various drainage or pumping schemes, the purpose of draining the water in the pipe is achieved, avoiding the influence of the water inside the pipe on the underwater welding quality, improving the welding quality, improving the quality of structural welding repair, and thus extending the service life of the structure. When the present application is used for underwater local dry welding repair of tubular structures, the purpose of draining the water inside the tubular structure can be achieved by combining with a drainage cover, thereby avoiding the influence of the internal water on the welding quality and improving the quality of structural repair.

[0024] Further, if Figure 2 As shown, the drain cover sealing gasket 3 is provided with a through hole corresponding to the drain cover 2, and the drain pipe 5 is inserted into the pipe body 1 along the through hole; the drain cover 2 is connected with a binding belt 6, and the binding belt 6 is sleeved on the pipe body 1 to fix the drain cover 2 at the position of the pipe body 1 to be repaired.

[0025] In this embodiment, preferably, a through hole is opened in the middle of the drain cover gasket 3, the drain cover 2 is pressed on the pipe body 1 through the drain cover gasket 3, the compressed air enters the pipe body 1 through the drain cover 2, and the drain pipe 5 is inserted into the pipe body 1 along the drain cover 2, and the port is located below the water surface 12 in the pipe. In order to fix the drain cover 2, the drain cover 2 is fixed to the pipe body 1 by a binding belt 6.

[0026] Further, if Figure 2 and Figure 3 As shown, the drain cover 2 is provided with an air inlet hole 7, and the air inlet hole 7 is connected to an air inlet pipe 4, through which compressed air is injected into the drain cover 2; the drain cover 2 is provided with a drain hole 8 on the side away from the air inlet hole 7, and a drain pipe 5 is plugged into the drain hole 8, and one end of the drain pipe 5 is inserted into the drain hole 8 and extends into the pipe body 1, so that the water in the pipe body 1 is discharged from the drain pipe 5. Preferably, the drain cover 2 and the drain cover sealing gasket 3 are both set in an arc shape, so that the drain cover 2 is stably set on the pipe body 1.

[0027] A construction method for repairing a tubular structure by underwater local dry welding mainly comprises the following steps: S1, laying the drainage cover sealing pad 3 on the position to be repaired of the pipe body 1; S2, the drain cover 2 abuts against the drain cover sealing pad 3 and is fixed to the pipe body 1 by the binding belt 6; S3, the air inlet pipe 4 injects compressed air into the drain cover 2, the pressure inside the pipe body 1 increases, and the water is discharged along the drain pipe 5; S4, after the drainage meets the requirements, the drainage pipe 5 is blocked to achieve the drainage purpose.

[0028] Further, if Figure 3 to Figure 4As shown, a one-way valve 9 is also provided at the far end of the position to be repaired of the pipe body 1, and the air inlet pipe 4 injects compressed air into the drainage cover 2 to block the drainage pipe 5, and discharge the water along the one-way valve 9; a rubber airbag 10 is also provided between the positions to be repaired on both sides of the pipe body 1, and the rubber airbag 10 is fitted with the inner wall of the pipe body 1 so that the water on both sides of the rubber airbag 10 does not flow; the drainage cover 2 is installed at the positions to be repaired on both sides of the rubber airbag 10, so as to repair the positions to be repaired simultaneously or sequentially.

[0029] As a preferred embodiment 1, a one-way valve 9 is installed at the far end of the pipe body 1 to drain water: When the pipe body 1 is repaired by underwater local dry welding, the damaged part of the pipe body 1 (damage A at the flat welding position, damage B at the horizontal or vertical welding position, damage C at the overhead welding position) is covered with a drainage cover 2 used for underwater local dry welding, and the drainage cover 2 is fixed and fastened with a binding belt 6. The drainage cover 2 is firmly installed on the pipe body 1 through the binding belt 6, and is tightly fitted to the pipe body 1 through the drainage cover sealing gasket 3 to achieve a sealing effect.

[0030] Drill a hole and make a thread at the far end of the damaged point to form a one-way valve installation hole 11 to install the one-way valve 9, and open the one-way valve 9. The drain cover 2 is provided with an air inlet hole 7, and the air inlet pipe 4 enters the drain cover 2 through this hole. At this time, the drain / pump hole 8 of the drain cover 2 is closed, and the drain cover 2 is not installed with a drain / pump pipe 5.

[0031] Compressed air is injected into the drainage cover 2 through the air inlet pipe 4. The air pressure is slightly greater than the pressure of the surrounding water environment. The pressure difference between the gas and the surrounding water environment is used to discharge the water from the one-way valve 9. The one-way valve 9 is closed to complete the drainage of the pipe. Regardless of whether the damage is in the flat welding position, vertical welding position, horizontal welding position or overhead welding position-overhead welding position, the drainage hole and the one-way valve 9 are opened at the bottom of the pipe body 1.

[0032] As a preferred embodiment 2, the pipe body 1 is self-drained through the drainage cover 2: When the pipe body 1 is repaired by underwater local dry welding, the damaged part of the pipe body (damage at the flat welding position, damage at the horizontal welding position or the vertical welding position, damage at the overhead welding position) is covered with the drainage cover 2 used for underwater local dry welding, and the drainage cover 2 is fixed and fastened with the binding belt 6. The drainage cover 2 is firmly installed on the tubular structure through the binding belt 6, and is tightly fitted to the pipe body 1 through the drainage cover sealing gasket 3 to achieve a sealing effect.

[0033] The drain cover 2 is provided with two holes, namely, an air inlet hole 7 and a drain / pump hole 8 of the drain cover 2. The air inlet pipe 4 enters the drain cover 2 through the air inlet hole 7, and the drain / pump pipe 5 protrudes from the inside of the drain cover 2 to the outside of the cover through the drain / pump hole 8. At this time, the drain / pump pipe 5 is used as a drain pipe.

[0034] Insert the inner end of the drainage cover 2 into the lower position of the damaged pipe. At this time, inject compressed air into the air inlet pipe 4. The air pressure is slightly greater than the surrounding water environment pressure. The pressure difference between the gas in the cover and the water environment is used to discharge the water from the drainage pipe 5. After the drainage meets the requirements, the drainage pipe 5 is blocked to achieve the drainage purpose.

[0035] As a preferred embodiment 3, water is pumped out through the drainage cover 2: When the pipe body 1 is repaired by underwater local dry welding, the damaged part of the pipe body 1 (damage at the flat welding position, damage at the horizontal welding position or the vertical welding position, damage at the overhead welding position) is covered with the drainage cover 2 used for underwater local dry welding, and the drainage cover 2 is fixed and fastened with the binding tape 6. The drainage cover 2 is firmly installed on the pipe body 1 by the binding tape, and is tightly fitted to the pipe body 1 through the drainage cover sealing gasket 3 to achieve a sealing effect.

[0036] The drain cover 2 is provided with two holes, namely, an air inlet hole 7 and a drain / pump hole 8 of the drain cover 2. The air inlet pipe 4 enters the drain cover 2 through the air inlet hole 7, and the drain / pump pipe 5 protrudes from the inside of the drain cover 2 to the outside of the cover through the drain / pump hole 8. At this time, the drain / pump pipe 5 is used as a pump pipe.

[0037] Insert the inner end of the pumping pipe cover into the lower position of the damaged pipe, connect the outer end of the pumping pipe cover to the pumping device, start the pumping device, and pump out the water in the pipe. While pumping water, inject air into the cover through the air inlet 7 to balance the pressure difference between the inside and outside, and prevent the drainage cover 2 from being damaged due to excessive external water pressure. After the pumping is completed, the pumping pipe is blocked to achieve the purpose of draining water in the pipe.

[0038] As a preferred embodiment 4, the pipe body 1 has multiple damages and drainage is performed: when the pipe body 1 has two or more damages, the rubber airbag 10 can be used to cut off the water in the pipe to achieve the purpose of isolating multiple damages and dividing them into multiple single damages for treatment.

[0039] There is a damage at each end of the tube body 1. Choose any one of the two damages, insert a rubber airbag 10 into the tube, and then fill the rubber airbag 10 with gas. The airbag needs to reach enough pressure to make the airbag wall stick tightly to the inner wall of the tube body 1 to ensure that the airbag will not leak or slide during drainage. In this way, the water in the tube between the two damages is cut off by the airbag, and the water on both sides will not flow, which is equivalent to changing the situation where two damages need to be considered at the same time during the drainage process to the situation where only one damage needs to be considered at the same time. After the first damage is dealt with, the second damage can be dealt with.

[0040] After the airbag is installed, a drainage cover 2 is installed at the damaged location and drainage is performed. The drainage method can be any of the above. The presence of the rubber airbag 10 does not affect the service of the tubular structure and can be left in the tube. Similarly, if multiple damages occur, the number of airbags required is determined according to demand.

[0041] Based on the underwater local dry welding repair of tubular structures, various drainage or pumping schemes are adopted to achieve the purpose of emptying the water in the pipe, avoiding the influence of the water inside the pipe on the underwater welding quality, improving the welding quality, improving the quality of structural welding repair, and thus extending the service life of the structure. When the present application is used for underwater local dry welding repair of tubular structures, the drainage cover can be combined to achieve the purpose of emptying the water inside the tubular structure, thereby avoiding the influence of the internal water on the welding quality and improving the quality of structural repair.

[0042] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An underwater local dry welding repair of a tubular structure, characterized in that: It includes a drain cover and a drain cover sealing gasket. The drain cover is arranged on the drain cover sealing gasket. The drain cover is arranged at the position to be repaired of the pipe body through the drain cover sealing gasket. One side of the drain cover is connected with an air intake pipe. The side of the drain cover away from the air intake pipe is connected with a drain pipe. The air intake pipe injects compressed air into the drain cover to discharge the water in the pipe body from the drain pipe, so as to weld and repair the position to be repaired of the pipe body.

2. The method for repairing a tubular structure by underwater local dry welding according to claim 1, characterized in that: The drainage cover sealing pad is provided with a through hole corresponding to the drainage cover, and the drainage pipe is inserted into the pipe body along the through hole.

3. The method for repairing a tubular structure by underwater local dry welding according to claim 2, characterized in that: The drainage cover is connected with a binding belt, which is sleeved on the pipe body to fix the drainage cover on the position of the pipe body to be repaired.

4. The method for repairing a tubular structure by underwater local dry welding according to claim 3, characterized in that: An air inlet hole is arranged on the drain cover, and an air inlet pipe is connected to the air inlet hole to inject compressed air into the drain cover.

5. The method for repairing a tubular structure by underwater local dry welding according to claim 4, characterized in that: A drainage hole is arranged on the side of the drainage cover away from the air inlet, a drainage pipe is plugged into the drainage hole, and one end of the drainage pipe is inserted into the drainage hole and extends into the pipe body, so that the water in the pipe body can be discharged from the drainage pipe.

6. The method for repairing a tubular structure by underwater local dry welding according to claim 2, characterized in that: The drain cover and the drain cover sealing pad are both arranged in an arc shape so that the drain cover can be stably arranged on the pipe body.

7. A construction method for repairing a tubular structure by underwater local dry welding, characterized in that: The main steps include: S1. Lay the drainage cover sealing pad on the position to be repaired on the pipe body; S2, the drain cover is in contact with the drain cover sealing pad and fixed to the pipe body by a binding belt; S3, the air inlet pipe injects compressed air into the drain cover, the pressure inside the pipe body increases, and the water is discharged along the drain pipe; S4. After the drainage meets the requirements, seal the drainage pipe to achieve the drainage purpose.

8. The construction method for repairing a tubular structure by underwater local dry welding according to claim 7 is characterized in that: The method also includes setting a one-way valve at the far end of the position to be repaired of the pipe body, injecting compressed air into the drainage cover through an air inlet pipe, blocking the drainage pipe, and discharging water along the one-way valve.

9. The construction method for repairing a tubular structure by underwater local dry welding according to claim 7 is characterized in that: The method also includes arranging a rubber airbag between the positions to be repaired on both sides of the pipe body, wherein the rubber airbag is fitted to the inner wall of the pipe body so that water on both sides of the rubber airbag does not flow.

10. The construction method for repairing a tubular structure by underwater local dry welding according to claim 9, characterized in that: Drain covers are installed at the positions to be repaired on both sides of the rubber airbag, so that the positions to be repaired can be repaired simultaneously or sequentially.

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