CN114850651B - In-service pipeline welding repair method and device - Google Patents
In-service pipeline welding repair method and device Download PDFInfo
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- CN114850651B CN114850651B CN202210625209.1A CN202210625209A CN114850651B CN 114850651 B CN114850651 B CN 114850651B CN 202210625209 A CN202210625209 A CN 202210625209A CN 114850651 B CN114850651 B CN 114850651B
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- 230000008439 repair process Effects 0.000 title claims abstract description 62
- 238000003466 welding Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000011010 flushing procedure Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000001953 recrystallisation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
- B23K20/126—Workpiece support, i.e. backing or clamping
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses an in-service pipeline welding repair method and device, and relates to the technical field of pipeline repair; in order to improve the effect of pipeline repair; the repairing method comprises the following steps: the position and the size of the pipeline damage leakage are probed; cleaning the silt attached to the surface of the pipeline, and flushing the pipeline until the bottom of the pipeline is exposed; placing a lining pipe assembly which is excessively matched with a damaged pipeline at the damaged position of the pipeline, wherein the lining pipe assembly consists of a main repair lining pipe, an auxiliary lining pipe and a rotary friction plate; the welding repair device comprises a centering mechanism, wherein the centering mechanism comprises a left section and a right section, and the left section and the right section are connected by utilizing an internal expansion type clamp assembly. According to the invention, the main repair lining pipe and the auxiliary lining pipe are filled in the damaged part of the inner wall of the pipeline, so that the damaged part can be effectively sealed, and friction welding between the main repair lining pipe and the auxiliary lining pipe can be realized by arranging the rotary friction plate.
Description
Technical Field
The invention relates to the technical field of pipeline repair, in particular to an in-service pipeline welding repair method and device.
Background
In municipal pipelines, when the pipelines are damaged, liquid or gas can be quickly gushed out under the action of pressure, normal domestic water and gas consumption of surrounding residents can be influenced, and meanwhile, the gas can generate explosion danger after leakage, so that larger loss can be caused, and therefore, the broken parts of the pipelines need to be quickly and safely repaired by using a repairing device in time;
at present, various technologies are adopted for damaged and leaked conveying pipelines to enable the damaged and leaked conveying pipelines to recover normal use functions, and the repairing method comprises an outer anti-corrosion layer repairing technology and an inner repairing technology; for example, when holes appear on the inner wall of the pipeline, the holes need to be repaired in a punctiform manner; the traditional repairing method comprises a resin curing method and a double-expansion-ring method, but the problems of difficult adhesion to a pipe wall, easy falling, aging, loosening and pipeline leakage caused by the method are easy to occur in the using process, and inconvenience is brought to the use, so that in order to ensure the durability of the repaired pipeline, a repairing method of the in-service pipeline is required to be designed, the sealing performance between a repairing element and the damaged part of the pipeline and the compactness and stability after connection can be improved through a welding mode, the repairing effect is improved, and the pipeline is prevented from being damaged again in the using process.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an in-service pipeline welding repair method and device.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an in-service pipeline welding repair method comprises the following steps:
s1: the position and the size of the pipeline damage leakage are probed;
s2: cleaning the silt attached to the surface of the pipeline, and flushing the pipeline until the bottom of the pipeline is exposed;
s3: placing a lining pipe assembly which is excessively matched with a damaged pipeline at the damaged position of the pipeline, wherein the lining pipe assembly consists of a main repair lining pipe, an auxiliary lining pipe and a rotary friction plate;
s4: the main repair lining pipe and the auxiliary lining pipe are close to the circumferential inner wall of the damaged pipeline, so that the main repair lining pipe can completely cover the damaged part of the pipeline, and meanwhile, the length of the main repair lining pipe covered on the surface of the pipeline wall needs to exceed the diameter of the pipeline to be repaired;
s5: after the main repair lining pipe and the auxiliary lining pipe are close to each other in the damaged pipeline, the butt joint between the main repair lining pipe and the auxiliary lining pipe is provided with a V-shaped or U-shaped groove;
s6: fitting the outer surface of the rotary friction plate with the surface of a V-shaped or U-shaped groove formed between the main lining pipe and the auxiliary lining pipe, wherein the outer structure of the rotary friction plate is matched with the V-shaped or U-shaped groove;
s7: the welding repair device clamps the rotary friction plate by using an internal expansion clamp, applies supporting force to the inner surface of the rotary friction ticket, and uses pressure to enable the rotary friction plate to generate high-speed rotation in the V-shaped or U-shaped groove to rub the V-shaped or U-shaped groove;
s8: friction heat and plastic deformation heat are generated in the high-speed rotating friction process, so that the temperature of the area near the V-shaped or U-shaped groove is increased to a temperature interval close to but lower than the melting point;
s9: under the action of friction force, the material generates plastic deformation and flow, and the welding is realized through molecular diffusion and recrystallization of an interface;
the repairing device comprises a aligning mechanism, wherein the aligning mechanism comprises a left section and a right section, the left section and the right section are connected by using an internal expansion type clamp assembly, the left section and the right section are arranged in an axisymmetric manner, and the specifications of the left section and the right section are the same;
the aligning mechanism comprises a framework part and an adjusting part; the framework part comprises a mounting base, a mounting disc and a connecting column; the mounting base and the mounting disc are welded and fixed by using a connecting column;
the adjusting section includes:
and a second accommodating frame: the welding device is circumferentially distributed and welded on the circumferential outer wall of the mounting plate;
a connecting rod: one end of the connecting rod is movably connected with the inner wall of a through hole formed in the two surfaces of the accommodating frame through a bearing, and a support column is welded at one end of the connecting rod close to the edge;
holding frame one: the device is welded at the center of the connecting rod, the inner wall of the accommodating frame is movably connected with a rocker through a bearing, and one end of the rocker, which is far away from the connecting rod, is connected with a screw rod adjusting assembly;
the screw rod adjusting assembly comprises a servo motor, a screw rod and a moving disc; one end of the screw rod is movably connected to the inner wall of the through hole formed in the surface of the mounting plate, and the other end of the screw rod is connected to the output end of the servo motor fixed on the surface of the mounting base through a coupler;
the movable disc and the screw rod are mutually matched, and one end of the rocker far away from the connecting rod is movably connected to the outer wall of the movable disc;
a support is fixed on the outer wall of one side of the mounting plate, a rotating plate is movably connected to the outer wall of the circumference of the support, a sliding rod is fixed between the two rotating plates, and a first gasket and a second gasket are welded on the surfaces of the two sliding rods respectively;
the inner expansion type clamp assembly comprises a clamping part and a control part; the clamping part includes:
cross-shaped plate: the sliding rod is movably connected to the circumferential outer walls of the two sliding rods, and the surface of the sliding rod is provided with a waist-shaped hole which is in a cross section;
clamp plate one: the bottom of the first gasket is integrally provided with a first compression bar and a second sliding bar, the bottom of the first compression bar is movably connected to the upper surface of the second gasket, and the second sliding bar is movably connected to the inner wall of the waist-shaped hole;
and (2) a clamping plate II: the bottom of the gasket is integrally provided with a first sliding rod and a second pressing rod, the first sliding rod is movably connected to the inner wall of the waist-shaped hole, and the second pressing rod is movably connected to the side wall of the gasket;
the control unit includes:
and (3) a hydraulic cylinder: the device is fixed on the inner wall of one side of the bracket, and the output end of the device is fixed with a fixing frame;
and (3) a driving motor: the fixing frame is fixed on the inner wall of one side of the fixing frame;
and (3) rotating rods: one end of the cross-shaped plate is movably connected to the surface of the fixing frame, and is connected with the output end of the driving motor through a coupler, and the other end of the cross-shaped plate is fixed on the outer wall of the cross-shaped plate.
As still further aspects of the invention: the liner tube assembly has a length tolerance of + -0.2 mm and an eccentricity of less than 0.2 mm.
The beneficial effects of the invention are as follows:
1. the lining pipe and the auxiliary lining pipe are filled at the damaged part of the inner wall of the pipeline, so that the damaged part can be effectively sealed, friction welding between the lining pipe and the auxiliary lining pipe in the main repair can be realized through the rotary friction plate, and loosening, falling and aging of the welded part in the subsequent long-time use process of the pipeline can be avoided.
2. The surfaces of the main lining pipe and the auxiliary lining pipe are provided with V-shaped or U-shaped grooves, so that positioning between the main lining pipe and the rotary friction plate is convenient to realize, and accuracy of the rotary friction plate in the welding process is guaranteed.
3. The center position of the internal expansion clamp assembly can be adjusted in the welding repair process by the aid of the centering mechanism, so that the internal expansion clamp assembly coincides with the pipe diameter center of the main repair lining pipe and the pipe diameter center of the auxiliary lining pipe, and eccentric rotation of the red rotary friction plate in the welding process can be avoided.
4. The inner expansion type clamp assembly is arranged to clamp and fix the rotary friction plate, so that the stability of the rotary friction plate in high-speed rotation can be ensured.
5. The opening amplitude of the internal expansion type clamp assembly can be adjusted by the hydraulic cylinder, so that the internal expansion type clamp assembly can be suitable for repairing pipelines with different inner diameters.
Drawings
FIG. 1 is a schematic diagram of a disassembly structure of a liner tube assembly of an in-service pipeline welding repair method according to the present invention;
FIG. 2 is a schematic diagram of a welded structure of a liner tube assembly according to the present invention;
FIG. 3 is a schematic diagram of the whole structure of an in-service pipeline welding repair device according to the present invention;
FIG. 4 is a schematic view of a partial explosion structure of an in-service pipeline welding repair device according to the present invention;
FIG. 5 is a schematic diagram of the overall structure of an internal expansion clamp assembly and a centering mechanism of an in-service pipeline welding repair device;
FIG. 6 is a schematic view of an installation structure of an internal expansion clamp assembly of an in-service pipeline welding repair device according to the present invention;
fig. 7 is a schematic diagram of the whole structure of a centering mechanism of an in-service pipeline welding repair device.
In the figure: 1-mounting base, 2-servo motor, 3-mounting plate, 4-support column, 5-slide bar, 6-clamp plate one, 7-hydraulic cylinder, 8-connecting rod, 9-gasket one, 10-clamp plate one, 11-rotating plate, 12-support, 13-lead screw, 14-moving plate, 15-fixing frame, 16-driving motor, 17-slide bar one, 18-rotating rod, 19-cross plate, 20-waist-shaped hole, 21-gasket two, 22-connecting column, 23-rocker, 24-holding frame one, 25-holding frame two, 26-clamp plate two, 27-clamp plate two, 28-slide bar two.
Detailed Description
The technical scheme of the patent is further described in detail below with reference to the specific embodiments.
Embodiments of the present patent are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely for convenience in describing the patent and simplifying the description, and do not limit the device, structure, or element to which it refers to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the patent.
In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
Example 1:
an in-service pipeline welding repair method comprises the following steps:
s1: the position and the size of the pipeline damage leakage are probed;
s2: cleaning the silt attached to the surface of the pipeline, and flushing the pipeline until the bottom of the pipeline is exposed;
s3: placing a lining pipe assembly which is excessively matched with a damaged pipeline at the damaged position of the pipeline, wherein the lining pipe assembly consists of a main repair lining pipe, an auxiliary lining pipe and a rotary friction plate;
s4: the main repair lining pipe and the auxiliary lining pipe are close to the circumferential inner wall of the damaged pipeline, so that the main repair lining pipe can completely cover the damaged part of the pipeline, and meanwhile, the length of the main repair lining pipe covered on the surface of the pipeline wall needs to exceed the diameter of the pipeline to be repaired;
s5: after the main repair lining pipe and the auxiliary lining pipe are close to each other in the damaged pipeline, the butt joint between the main repair lining pipe and the auxiliary lining pipe is provided with a V-shaped or U-shaped groove;
s6: fitting the outer surface of the rotary friction plate with the surface of a V-shaped or U-shaped groove formed between the main lining pipe and the auxiliary lining pipe, wherein the outer structure of the rotary friction plate is matched with the V-shaped or U-shaped groove;
s7: the welding repair device clamps the rotary friction plate by using an internal expansion clamp, applies supporting force to the inner surface of the rotary friction ticket, and uses pressure to enable the rotary friction plate to generate high-speed rotation in the V-shaped or U-shaped groove to rub the V-shaped or U-shaped groove;
s8: friction heat and plastic deformation heat are generated in the high-speed rotating friction process, so that the temperature of the area near the V-shaped or U-shaped groove is increased to a temperature interval close to but lower than the melting point;
s9: under the action of friction force, the plastic deformation and flow are generated along with the material, and the welding is realized through molecular diffusion and recrystallization of the interface.
Example 2:
a welding repair method of in-service pipelines is disclosed, wherein fig. 1 is a schematic diagram of a split structure among a main repair liner tube, an auxiliary liner tube and a rotary friction plate of a liner tube assembly, and fig. 2 is a schematic diagram of a welding state among the main repair liner tube, the auxiliary liner tube and the rotary friction plate of the liner tube assembly, wherein (1) is the main repair liner tube, (2) is the rotary friction plate, and (3) is the auxiliary liner tube;
the liner tube assembly has a length tolerance of + -0.2 mm and an eccentricity of less than 0.2 mm.
Example 3:
3-7, the in-service pipeline welding repair device comprises a centering mechanism, wherein the centering mechanism comprises a left section and a right section, the left section and the right section are connected by using an internal expansion clamp assembly, the left section and the right section are arranged in an axisymmetric manner, and the specifications of the left section and the right section are the same;
the aligning mechanism comprises a framework part and an adjusting part; the framework part comprises a mounting base 1, a mounting plate 3 and a connecting column 22; the mounting base 1 and the mounting plate 3 are welded and fixed by using a connecting column 22;
the adjusting section includes:
second holding frame 25: the circular arc welding device is circumferentially distributed and welded on the circumferential outer wall of the mounting plate 3;
connecting rod 8: one end of the connecting rod 8 is rotatably connected with the inner wall of a through hole formed in the surface of the accommodating frame II 25 through a bearing, and a support column 4 is welded at the position, close to the edge, of one end of the connecting rod;
holding frame one 24: the device is welded at the center of the connecting rod 8, the inner wall of the first holding frame 24 is rotatably connected with a rocker 23 through a bearing, and one end of the rocker 23 far away from the connecting rod 8 is connected with a screw rod adjusting assembly;
the center point of the inner expansion type clamp assembly can be adjusted by utilizing the aligning structure when the pipeline is repaired and welded, so that the rotating friction plate is prevented from eccentric rotation when the inner expansion type clamp assembly rotates, and the welding effect is ensured; the bending angle of the rocker 23 can be adjusted by the screw rod adjusting assembly, so that the opening amplitude of the connecting rod 8 can be adjusted, the repairing device can be suitable for pipelines with different inner diameters, and the supporting columns 4 can be used for supporting the pipe walls of the main repair lining pipe and the auxiliary lining pipe, so that the stability of the internal expansion type clamp assembly in high-speed rotation is ensured;
preferably, the number of the support columns 4 includes, but is not limited to, 4.
In order to ensure that the support columns 4 can support the walls of the main and auxiliary liners; as shown in fig. 3-7, the lead screw adjustment assembly includes a servo motor 2, a lead screw 13, and a movable disk 14; one end of the screw rod 13 is rotationally connected to the inner wall of a through hole formed in the surface of the mounting plate 3, the other end of the screw rod 13 is connected to the output end of the servo motor 2 fixed on the surface of the mounting base 1 through a coupler, the moving plate 14 and the screw rod 13 are mutually matched, and one end of the rocker 23, which is far away from the connecting rod 8, is rotationally connected to the outer wall of the moving plate 14;
the movable disk 14 can be controlled to move along the transverse direction by the screw rod 13, so that the opening amplitude of the connecting rod 8 can be adjusted.
In order to carry out friction welding between the main lining pipe and the auxiliary lining pipe; as shown in fig. 3-6, a bracket 12 is fixed on the outer wall of one side of the mounting plate 3 through bolts, a rotating plate 11 is rotatably connected to the outer wall of the circumference of the bracket 12, a sliding rod 5 is fixed between the two rotating plates 11 through bolts, and a first gasket 9 and a second gasket 21 are welded on the surfaces of the two sliding rods 5 respectively;
the inner expansion type clamp assembly comprises a clamping part and a control part; the clamping part includes:
cross plate 19: the sliding rod is connected with the circumferential outer walls of the two sliding rods 5 in a sliding way, and the surface of the sliding rod is provided with a waist-shaped hole 20 which is in a cross section;
clamping plate one 6: the bottom of the first gasket is integrally provided with a first compression bar 10 and a second sliding bar 28, the bottom of the first compression bar 10 is rotationally connected to the upper surface of the second gasket 21, and the second sliding bar 28 is slidingly connected to the inner wall of the waist-shaped hole 20;
clamp plate two 26: the bottom of the device is integrally provided with a first sliding rod 17 and a second pressing rod 27, the first sliding rod 17 is connected to the inner wall of the waist-shaped hole 20 in a sliding manner, and the second pressing rod 27 is connected to the side wall of the first gasket 9 in a rotating manner;
the control unit includes:
hydraulic cylinder 7: the device is fixed on the inner wall of one side of the bracket 12 through bolts, and the output end of the device is fixed with a fixing frame 15 through bolts;
drive motor 16: the fixing frame is fixed on the inner wall of one side of the fixing frame 15 through bolts;
the rotating rod 18: one end of the driving motor is rotatably connected to the surface of the fixing frame 15 and is connected with the output end of the driving motor 16 through a coupler, and the other end of the driving motor is fixed on the outer wall of the cross-shaped plate 19 through a bolt;
the transverse movement of the cross-shaped plate 19 can be controlled through the hydraulic cylinder 7, so that the first sliding rod 17 and the second sliding rod 28 can be simultaneously shifted by the waist-shaped hole 20 on the cross-shaped plate 19, the first sliding rod 17 and the second sliding rod 28 can slide along the surface of the waist-shaped hole 20 and simultaneously adjust the opening amplitude of the first clamping plate 6 and the second clamping plate 26, the first clamping plate 6 and the second clamping plate 26 can be utilized for carrying out inward expansion support on the rotary friction plate, the driving motor 16 can be utilized for driving the rotary friction plate to rotate at a high speed after the rotary friction plate is fixed, and therefore, welding fixation can be carried out between the main repair inner lining pipe and the auxiliary lining pipe.
When the welding repair device is used, when a pipeline is required to be welded and repaired, the main repair lining pipe and the auxiliary lining pipe are placed at the damaged position of the inner wall of the pipeline, meanwhile, the rotary friction plate is utilized to connect the main repair lining pipe and the auxiliary lining pipe, then the whole welding repair device is placed in the pipe wall of the main repair lining pipe and the pipe wall of the auxiliary lining pipe, the centering mechanism is utilized to realize centering of the internal expansion clamp assembly, so that the output shaft of the driving motor 16 can be concentric with the space between the main repair lining pipe and the auxiliary lining pipe, the rotary friction plate can be guaranteed to rotate at a high speed along the space between the main repair lining pipe and the auxiliary lining pipe, the internal expansion clamp assembly is utilized to perform internal expansion fixation on the inner wall of the rotary friction plate after centering, and then the driving motor 16 is started to enable the rotary friction plate to perform friction welding between the main repair lining pipe and the auxiliary lining pipe in the process of high-speed rotation, and therefore welding repair of the pipeline is realized.
While the invention has been described in terms of what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. An in-service pipeline welding repair method is characterized by comprising the following steps:
s1: the position and the size of the pipeline damage leakage are probed;
s2: cleaning the silt attached to the surface of the pipeline, and flushing the pipeline until the bottom of the pipeline is exposed;
s3: placing a lining pipe assembly which is excessively matched with a damaged pipeline at the damaged position of the pipeline, wherein the lining pipe assembly consists of a main repair lining pipe, an auxiliary lining pipe and a rotary friction plate;
s4: the main repair lining pipe and the auxiliary lining pipe are close to the circumferential inner wall of the damaged pipeline, so that the main repair lining pipe can completely cover the damaged part of the pipeline, and meanwhile, the length of the main repair lining pipe covered on the surface of the pipeline wall needs to exceed the diameter of the pipeline to be repaired;
s5: after the main repair lining pipe and the auxiliary lining pipe are close to each other in the damaged pipeline, the butt joint between the main repair lining pipe and the auxiliary lining pipe is provided with a V-shaped or U-shaped groove;
s6: fitting the outer surface of the rotary friction plate with the surface of a V-shaped or U-shaped groove formed between the main lining pipe and the auxiliary lining pipe, wherein the outer structure of the rotary friction plate is matched with the V-shaped or U-shaped groove;
s7: the welding repair device clamps the rotary friction plate by using an internal expansion clamp, applies supporting force to the inner surface of the rotary friction ticket, and uses pressure to enable the rotary friction plate to generate high-speed rotation in the V-shaped or U-shaped groove to rub the V-shaped or U-shaped groove;
s8: friction heat and plastic deformation heat are generated in the high-speed rotating friction process, so that the temperature of the area near the V-shaped or U-shaped groove is increased to a temperature interval close to but lower than the melting point;
s9: under the action of friction force, the material generates plastic deformation and flow, and the welding is realized through molecular diffusion and recrystallization of an interface;
the repairing device comprises a aligning mechanism, wherein the aligning mechanism comprises a left section and a right section, the left section and the right section are connected by using an internal expansion type clamp assembly, the left section and the right section are arranged in an axisymmetric manner, and the specifications of the left section and the right section are the same;
the aligning mechanism comprises a framework part and an adjusting part; the framework part comprises a mounting base (1), a mounting plate (3) and a connecting column (22); the mounting base (1) and the mounting disc (3) are welded and fixed by using a connecting column (22);
the adjusting section includes:
second holding frame (25): the circular arc welding device is circumferentially distributed and welded on the circumferential outer wall of the mounting disc (3);
connecting rod (8): one end of the connecting rod (8) is movably connected with the inner wall of a through hole formed in the surface of the accommodating frame II (25) through a bearing, and a support column (4) is welded at the position, close to the edge, of one end of the connecting rod;
holding frame one (24): the device is welded at the center of the connecting rod (8), the inner wall of the first accommodating frame (24) is movably connected with a rocker (23) through a bearing, and one end, far away from the connecting rod (8), of the rocker (23) is connected with a screw rod adjusting assembly;
the screw rod adjusting assembly comprises a servo motor (2), a screw rod (13) and a movable disc (14); one end of the screw rod (13) is movably connected to the inner wall of a through hole formed in the surface of the mounting disc (3), and the other end of the screw rod is connected to the output end of the servo motor (2) fixed on the surface of the mounting base (1) through a coupler;
the movable disc (14) and the screw rod (13) are mutually matched, and one end of the rocker (23) far away from the connecting rod (8) is movably connected to the outer wall of the movable disc (14);
a bracket (12) is fixed on the outer wall of one side of the mounting plate (3), a rotating plate (11) is movably connected to the outer wall of the circumference of the bracket (12), a sliding rod (5) is fixed between the two rotating plates (11), and a first gasket (9) and a second gasket (21) are welded on the surfaces of the two sliding rods (5) respectively;
the inner expansion type clamp assembly comprises a clamping part and a control part; the clamping part includes:
cross-shaped plate (19): the sliding rod is movably connected with the circumferential outer walls of the two sliding rods (5), and the surface of the sliding rod is provided with a waist-shaped hole (20) which is in a cross section;
clamp plate one (6): the bottom of the device is integrally provided with a first compression bar (10) and a second sliding bar (28), the bottom of the first compression bar (10) is movably connected to the upper surface of the second gasket (21), and the second sliding bar (28) is movably connected to the inner wall of the waist-shaped hole (20);
clamp plate two (26): the bottom of the device is integrally provided with a first sliding rod (17) and a second pressing rod (27), the first sliding rod (17) is movably connected to the inner wall of the waist-shaped hole (20), and the second pressing rod (27) is movably connected to the side wall of the first gasket (9);
the control unit includes:
hydraulic cylinder (7): the device is fixed on the inner wall of one side of the bracket (12), and the output end of the device is fixed with a fixing frame (15);
a drive motor (16): the fixing frame is fixed on the inner wall of one side of the fixing frame (15);
rotating rod (18): one end of the cross-shaped plate is movably connected to the surface of the fixed frame (15), and is connected with the output end of the driving motor (16) through a coupler, and the other end of the cross-shaped plate is fixed on the outer wall of the cross-shaped plate (19).
2. An in-service pipeline welding repair method according to claim 1 wherein the length tolerance of the liner tube assembly is ± 0.2 mm and the eccentricity is less than 0.2 mm.
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| CN202210625209.1A CN114850651B (en) | 2022-06-02 | 2022-06-02 | In-service pipeline welding repair method and device |
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| CN202210625209.1A CN114850651B (en) | 2022-06-02 | 2022-06-02 | In-service pipeline welding repair method and device |
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| CN114850651A (en) | 2022-08-05 |
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