CN117733387A - Deformed tube plate assembly welding deformation preventing device and deformed tube plate assembly welding method - Google Patents
Deformed tube plate assembly welding deformation preventing device and deformed tube plate assembly welding method Download PDFInfo
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- CN117733387A CN117733387A CN202311513600.3A CN202311513600A CN117733387A CN 117733387 A CN117733387 A CN 117733387A CN 202311513600 A CN202311513600 A CN 202311513600A CN 117733387 A CN117733387 A CN 117733387A
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- 238000003466 welding Methods 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000004677 Nylon Substances 0.000 claims description 17
- 229920001778 nylon Polymers 0.000 claims description 17
- 206010066054 Dysmorphism Diseases 0.000 claims description 5
- 239000002184 metal Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The invention discloses a special-shaped tube plate assembly welding deformation preventing device and a special-shaped tube plate assembly welding method, wherein the device is arranged in the special-shaped tube plate assembly and supports the special-shaped tube plate assembly from the inside, so that deformation of the special-shaped tube plate assembly is prevented during welding forming, the device comprises two arc plates, the radian and the size of the arc plates are matched with the shape and the size of the inner diameter of the special-shaped tube plate assembly, after the special-shaped tube plate assembly is welded to obtain a circumferentially closed cylinder structure, the device can be quickly and conveniently detached from the special-shaped tube plate assembly, in addition, the welding deformation of the special-shaped tube plate assembly is further reduced in a symmetrical and sectional welding mode, and the special-shaped tube plate assembly meets the precision requirement of subsequent processing.
Description
Technical Field
The invention relates to a welding auxiliary device of special equipment in the nuclear power field and a corresponding welding method.
Background
The Hualong No. PCS heat exchanger tube plate assembly consists of a crescent tube plate and a C-shaped cylinder part, and is made of 022Cr19Ni10 austenitic stainless steel with the length of 2000mm and the outer diameter
The tube plate has arc cross section, long and thin main structure, maximum thickness of 32mm, thickness of 6mm at longitudinal seam groove, 66 tube holes, and tube hole diameterThe cylinder body is of a thin-wall stainless steel structure, and the wall thickness is only 6mm.
When the Hualong No. one PCS heat exchanger tube plate assembly is processed, a cylinder part and a tube plate are respectively processed and obtained, and two sides of the tube plate and the cylinder part are welded into a whole through two long welding seams to form the tube plate assembly with a closed circumference, as shown in fig. 2.
Because the rigidity of the tube plate and the barrel part is poor, and the longitudinal seam is long, the welding is easy to deform. After the welding is finished, two ends are required to be welded with the reducing tee joint and the sealing head respectively, as shown in fig. 3, so that the misalignment amount and welding deformation must be ensured to be small enough, the requirements of drawing are met, and otherwise, the follow-up welding of the reducing tee joint and the sealing head is difficult to carry out.
The actual problem of the welding work on the upstream production is that the roundness of the tube plate assembly obtained by assembly welding must be strictly controlled, and then the assembly precision and the girth weld welding quality between the tube plate assembly and the reducing tee joint and between the tube plate assembly and the sealing head are ensured. In fact, no welding technique or apparatus is currently disclosed that meets the welding requirements of the tube sheet assemblies described above.
Based on the practical problems faced in the production and processing of the first-Wallace PCS heat exchanger tube plate assembly, the inventor conducts intensive research on the welding process, so as to expect to design a welding method and an auxiliary device capable of solving the problems.
Disclosure of Invention
In order to overcome the problems, the inventor has conducted intensive studies and devised a special-shaped tube plate assembly welding deformation prevention device and a special-shaped tube plate assembly welding method, the device is arranged in the special-shaped tube plate assembly, and the special-shaped tube plate assembly is supported from the inside, so that deformation of the special-shaped tube plate assembly is prevented during welding forming, wherein the device comprises two arc plates, the radian and the size of the arc plates are matched with the shape and the size of the inner diameter of the special-shaped tube plate assembly, after the special-shaped tube plate assembly is welded to obtain a circumferentially closed cylinder structure, the device can be quickly and conveniently disassembled and taken out from the special-shaped tube plate assembly, in addition, the welding deformation of the special-shaped tube plate assembly is further reduced in a symmetrical and sectional welding mode, so that the special-shaped tube plate assembly meets the precision requirement of subsequent processing, and the invention is completed.
In particular, the invention aims to provide a special-shaped tube plate assembly welding deformation preventing device, which comprises a first arc plate 1 and a second arc plate 2 which are movably connected with each other, wherein the cylinder part is tightly supported from the inside of the cylinder part through the first arc plate 1 and the second arc plate 2, and the roundness of the special-shaped tube plate assembly is kept in the process of welding the cylinder part and a tube plate longitudinal seam.
The connecting part of the first arc plate 1 and the second arc plate 2 is provided with a first pin shaft 3, and the first arc plate 1 and the second arc plate 2 are hinged through the first pin shaft 3.
Wherein, a top block 4 is arranged on the first arc plate 1,
a connecting block 5 is arranged on the second arc plate 2,
the deformation preventing device also comprises a tightening column 6 and an articulated screw rod 7;
one end of the movable joint screw rod 7 is movably connected with the connecting block 5, the other end is screwed with the jacking column 6,
one end of the jacking column 6 is screwed with the movable joint screw rod 7, the other end of the jacking column is a spherical surface, and the spherical surface can be jacked on the jacking block 4.
When the circle center of the first arc plate 1 is coincident with the circle center of the second arc plate 2, the first arc plate 1 and the second arc plate 2 jointly form a large arc plate, and the outer diameter size of the large arc plate is coincident with the inner diameter size of the special-shaped tube plate assembly.
Wherein, the axis of the jacking column 6 and the axis of the movable joint screw rod 7 both pass through the circle center of the large arc plate.
Wherein, an annular notch 61 is formed on the jacking column 6; nylon ropes are tied up on the tightening posts 6 through the annular notch 61.
The special-shaped tube plate assembly is obtained by longitudinally seam welding a cylinder part and a tube plate;
the section of the cylinder part is in a major arc shape,
the section of the tube plate is in a minor arc shape, and at least two rows of through holes for installing the heat exchange tubes are formed in the tube plate.
The invention also provides a method for assembling and welding the special-shaped tube plate assembly, which comprises the following steps:
step 1, preparing and obtaining a tube plate and a barrel part, and finishing the dimensions so that after the tube plate and the barrel are assembled, when the inner contour of the cross section of the tube plate and the inner contour of the cross section of the barrel part are in a common circle, a preset assembly gap is reserved at each longitudinal seam;
step 2, adjusting the roundness of the tube plate and the cylinder part to enable the tube plate and the cylinder part to meet the design requirement;
step 3, installing the special-shaped tube plate assembly welding deformation preventing device according to the claims 1 to 7 in a cylinder part;
and step 4, symmetrically and sectionally welding longitudinal seams of the tube plate and the barrel part, and taking out the welding deformation preventing device after the welding is finished.
Wherein, in the step 1, the size of the assembly gap is 4-6 mm.
Wherein, the step 3 comprises the following substeps:
step 1, binding a nylon rope on a tightening column 6, ensuring that one end of the nylon rope is outside a barrel part, and placing the deformation preventing device inside the barrel part;
step 2, the spherical end part of the propping column 6 is propped against the jacking block 4, and the first arc plate 1 and the second arc plate 2 jointly prop up the barrel part by screwing the movable joint screw rod 7;
and 3, screwing the movable joint screw rod 7 to enlarge the diameter size of a large arc plate formed by the first arc plate 1 and the second arc plate 2 until the diameter size of the large arc plate is consistent with the inner diameter size of the special-shaped tube plate assembly.
The invention has the beneficial effects that:
(1) According to the special-shaped tube plate assembly welding deformation preventing device and the special-shaped tube plate assembly welding method, the operation is simple, the practicability is high, the heat in and out in the welding process can be reduced by controlling the assembly gap of the tube plate and the longitudinal seam groove of the cylinder body and the welding sequence, the collapse of the vicinity of the longitudinal seam to the inside is avoided, and the roundness of the tube plate assembly is ensured;
(2) The special-shaped tube plate assembly welding deformation preventing device and the special-shaped tube plate assembly welding method are particularly suitable for welding long longitudinal joints and small-diameter special-shaped tube plate assembly longitudinal joints of a shell-and-tube heat exchanger, and can ensure the assembly precision and the girth weld welding quality between the tube plate assembly and the reducing tee joint and between the tube plate assembly and the sealing head.
Drawings
FIG. 1 shows a schematic overall structure of a welding deformation preventing device for a special-shaped tube plate assembly;
FIG. 2 shows a schematic structural view of a Hualong No. one PCS heat exchanger tube sheet assembly;
FIG. 3 shows a schematic view of the construction of a Hualong No. one PCS heat exchanger tube sheet assembly with a reducing tee and a header installed thereon;
fig. 4 shows a schematic structural view of the shaped tube sheet assembly weld distortion prevention device installed in the tube sheet assembly.
Reference numerals
1-first arc plate
2-second arc plate
3-first pin shaft
4-roof block
5-connecting block
6-jack column
61-annular groove
7-articulated screw
8-second pin shaft
91-barrel part
92-tube plate
Detailed Description
The invention is further described in detail below by means of the figures and examples. The features and advantages of the present invention will become more apparent from the description.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The anti-deformation device for the assembly welding of the special-shaped tube plate assembly is shown in fig. 1 and 4, and is mainly used for guaranteeing the roundness of the PCS heat exchanger tube plate assembly in Hualong No. 1 when the PCS heat exchanger tube plate assembly is welded, and preventing the defect that the dimensional quality does not meet the design requirement due to thermal deformation;
the deformation-preventing device comprises a first arc plate 1 and a second arc plate 2 which are movably connected with each other, wherein the cylinder part is tightly supported from the inside of the cylinder part through the first arc plate 1 and the second arc plate 2, and the roundness of the special-shaped tube plate assembly is kept in the longitudinal seam welding process of the cylinder part and the tube plate.
Preferably, a first pin 3 is provided at the connection of the first arc plate 1 and the second arc plate 2, and the first arc plate 1 and the second arc plate 2 are hinged by the first pin 3.
In the application, the thickness of the first arc plate 1 and the second arc plate 2 is set to be 10-40 mm; the thickness is required to ensure a sufficiently wide bearing surface and strength; the weight is greatly increased due to the excessively high thickness, and the risk of damaging the inner wall of the scratch heat exchange tube is increased when the device is disassembled; based on this, it is preferable that the thickness of the first and second arc plates 1 and 2 is set to 30mm.
In a preferred embodiment, the first arc plate 1 is provided with a top block 4, the first arc plate 1 and the top block 4 are in an integral structure, and can be fixedly combined into a whole by welding, and the top block 4 has at least one plane and faces the inner side of the deformation device;
the connecting block 5 is arranged on the second arc plate 2, the second arc plate 2 and the connecting block 5 are of an integrated structure, and the second arc plate and the connecting block 5 can be fixedly connected into a whole in a welding mode;
the deformation preventing device also comprises a tightening column 6 and an articulated screw rod 7;
one end of the movable joint screw rod 7 is movably connected with the connecting block 5, and the other end of the movable joint screw rod is screwed with the jacking column 6, preferably, one end of the movable joint screw rod 7 is hinged with the connecting block 5 through a second pin shaft 8; the first pin shaft 3 and the second pin shaft 8 are vertically arranged here so as to facilitate the disassembly of the deformation device, and the whole length of the rod piece formed by the jacking column 6 and the movable joint screw rod 7 can be controlled by screwing the jacking column 6;
one end of the jacking column 6 is screwed with the movable joint screw rod 7, the other end of the jacking column is a spherical surface, and the spherical surface can be jacked on the jacking block 4.
In a preferred embodiment, when the center of the first arc plate 1 is coincident with the center of the second arc plate 2, the first arc plate 1 and the second arc plate 2 together form a large arc plate, and the outer diameter size of the large arc plate is coincident with the inner diameter size of the special-shaped tube plate assembly.
Preferably, when the spherical end of the tightening post 6 is tightened against the top piece 4, both the axis of the tightening post 6 and the axis of the articulation screw 7 pass through the centre of the large arc.
In this application, the external diameter size of big arc is unanimous with the internal diameter size of waiting welded dysmorphism tube sheet subassembly to make this dress weld preapring for an unfavorable turn of events shape device can with dysmorphism tube sheet subassembly in close contact, ensure the dysmorphism tube sheet subassembly to produce deformation in all-round.
Preferably, the welding deformation preventing device is further provided with a limiting device, and the limiting device limits the rotation angle of the first arc plate 1 and the second arc plate 2 around the first pin shaft 3, so that the outward rotation expansion angle of the first arc plate 1 and the second arc plate 2 is limited, and the deformation preventing device can be expanded outwards to the maximum extent that the large arc plate is generated, namely, the maximum extent can allow the first arc plate 1 and the second arc plate 2 to rotate outwards to the positions with the circle centers coincident with each other. By arranging the limiting device, the movable joint screw rod 7 can be quickly screwed to control the first arc plate 1 and the second arc plate 2 to outwards rotate in the actual working process until the first arc plate and the second arc plate cannot be continuously screwed to acquire that the limiting device reaches the limiting position, and the radian or the rotation elongation is not required to be measured in real time; the installation accuracy of the deformation preventing device can be guaranteed, and the installation efficiency can be accelerated.
The limiting device can be arranged on the first arc plate 1, the second arc plate 2 or the first pin shaft 3; the limiting device can also be arranged on the joint screw 7 by limiting the maximum extension of the joint screw 7 and the abutment post 6.
In a preferred embodiment, an annular groove 61 is formed in the tightening post 6; the nylon rope is bound on the jacking column 6 through the annular notch 61, namely the nylon rope is bound on the annular notch 61, so that the spherical end of the jacking column 6 can be pulled away from the jacking block 4 by pulling the nylon rope, the jacking column 6 is separated from the jacking block 4, and the first arc plate 1 and the second arc plate 2 can rotate around the first pin shaft 3 and are close to each other.
In a preferred embodiment, the profiled tube sheet assembly is produced by longitudinal seam welding of a tube body part 91 and tube sheet 92, as shown in FIG. 2;
the section of the cylinder part is in a major arc shape,
the section of the tube plate is in a minor arc shape, and at least two rows of through holes for installing the heat exchange tubes are formed in the tube plate.
The invention also provides a method for assembling and welding the special-shaped tube plate assembly, which comprises the following steps:
step 1, preparing and obtaining a tube plate and a barrel part, and finishing the dimensions so that after the tube plate and the barrel are assembled, when the inner contour of the cross section of the tube plate and the inner contour of the cross section of the barrel part are in a common circle, a preset assembly gap is reserved at each longitudinal seam;
in step 1, the size of the assembly gap is 4-6 mm.
Preferably, in order to make the size of the assembly gap reach 4-6 mm, the single-side longitudinal groove is removed by 2-3 mm along the circumferential direction at the position of the relative theoretical groove, in fact, the part of the edge of the workpiece is removed, and the workpiece is backfilled by solder afterwards, so that the welding penetration during assembly welding can be ensured, good welding quality can be realized, and the deformation amount of a welded product can be reduced.
Preferably, when grooves of the tube plate and the barrel part are machined, the blunt edges of the tube plate and the barrel part are guaranteed to be parallel after the tube plate and the barrel part are assembled, and the radial line parallel to the theoretical groove position is not the extension line but passes through the center of a circle, so that the assembly gap is guaranteed to be uniform.
Step 2, adjusting the roundness of the tube plate and the cylinder part to enable the tube plate and the cylinder part to meet the design requirement;
the processing process of the barrel part is as follows: firstly, drawing and forming the stainless steel pipe, and then cutting off redundant areas which are about the size of the pipe plate, namely, processing longitudinal seam notches, so as to obtain the cylinder part. Because the pipe has internal stress, after the longitudinal seam notch is processed, the stress is released, the notch is contracted inwards, the diameter of the cylinder is smaller than a theoretical value, and based on the internal stress, the roundness of the part of the expanded cylinder needs to be adjusted.
Step 3, installing the special-shaped tube plate assembly welding deformation preventing device in the cylinder part;
the installation quantity is set according to the length of the special-shaped tube plate assembly, the welding anti-deformation device is generally installed every 600mm-700mm, and 4-6 parts are uniformly arranged in the Hualong No. one PCS heat exchanger tube plate assembly.
The step 3 comprises the following sub-steps:
step 1, binding a nylon rope on a tightening column 6, ensuring that one end of the nylon rope is outside a barrel part, and placing the deformation preventing device inside the barrel part;
step 2, the spherical end part of the propping column 6 is propped against the jacking block 4, and the first arc plate 1 and the second arc plate 2 jointly prop up the barrel part by screwing the movable joint screw rod 7;
and 3, screwing the movable joint screw rod 7 to enlarge the diameter size of a large arc plate formed by the first arc plate 1 and the second arc plate 2 until the diameter size of the large arc plate is consistent with the inner diameter size of the special-shaped tube plate assembly.
And step 4, symmetrically and sectionally welding longitudinal seams of the tube plate and the barrel part, and taking out the welding deformation preventing device after the welding is finished.
The welding process specifically comprises the following sub-steps:
a substep a, welding the middle position of the first longitudinal seam with the welding length of 200-300mm,
a substep b, welding is carried out at the middle position of the second longitudinal seam, the welding length is 200-300mm,
c, in the first longitudinal joint, after the welded part to be deposited metal is cooled to be close to room temperature, the two sides of the welded joint are respectively separated by 200-300mm and are not welded, the length of the welded joint is 200-300mm,
in the sub-step d, after the welded part of the second longitudinal joint is cooled to be close to room temperature, the two sides of the welded joint are respectively separated by 200-300mm and are not welded, the length of the welded joint is 200-300mm,
e, repeating the substep c and the substep d until the limit length of the tube plate and the barrel part is reached;
step f, on the first longitudinal joint, after the welded part to be deposited metal is cooled to be close to room temperature, repairing welding the non-welded part, selecting the non-welded part from the middle to two sides, and selecting a section of non-welded part on each side for repairing welding;
step g, on the second longitudinal joint, after the welded part to be deposited metal is cooled to be close to room temperature, repairing welding the non-welded part, selecting the non-welded part from the middle to two sides, and selecting a section of non-welded part on each side for repairing welding;
and (h) repeating the substep f and the substep g until the two longitudinal joints are completely welded.
Preferably, the main operation process of taking out the welding deformation preventing device is that the tightening column 6 is separated from the top block 4 by pulling the nylon rope, and then the welding deformation preventing device is pulled out of the special-shaped tube plate assembly by slowly pulling the nylon rope.
Examples:
the Hualong No. PCS heat exchanger tube plate assembly consists of a crescent tube plate and a C-shaped cylinder part, and is made of 022Cr19Ni10 austenitic stainless steel with the length of 2000mm and the outer diameter
The tube plate has arc cross section, long and thin main structure, maximum thickness of 32mm, thickness of 6mm at longitudinal seam groove, 66 tube holes, and tube hole diameterThe cylinder body is of a thin-wall stainless steel structure, and the wall thickness is only 6mm.
The tube plate assembly is obtained by assembly welding, and the specific operation process is as follows:
step 1, preparing a tube plate and a barrel part, removing 3mm of a single-side longitudinal joint groove along the circumferential direction at the position of a relative theoretical groove, so that after the tube plate and the barrel are assembled, when the inner contour of the cross section of the tube plate and the inner contour of the cross section of the barrel part are in a common circle, an assembly gap of 6mm is reserved at each longitudinal joint;
step 2, adjusting the roundness of the tube plate and the cylinder part to enable the tube plate and the cylinder part to meet the design requirement;
step 3, uniformly installing 4 special-shaped tube plate assembly welding deformation preventing devices in the barrel part, wherein the installation effect is shown in fig. 4;
the step 3 comprises the following sub-steps:
step 1, binding a nylon rope on a tightening column, ensuring that one end of the nylon rope is outside a barrel part, and placing the deformation preventing device inside the barrel part;
step 2, propping the spherical end part of the propping column against the jacking block, and enabling the first arc plate and the second arc plate to jointly prop up the barrel part by screwing the movable joint screw rod;
and 3, screwing the movable joint screw rod to enlarge the diameter size of a large arc plate formed by the first arc plate and the second arc plate until the diameter size of the large arc plate is consistent with the inner diameter size of the special-shaped tube plate assembly.
And step 4, symmetrically and sectionally welding longitudinal seams of the tube plate and the barrel part, and taking out the welding deformation preventing device after the welding is finished.
The welding process specifically comprises the following sub-steps:
a substep a, welding the middle position of the first longitudinal seam with the welding length of 230mm,
a substep b, welding the middle position of the second longitudinal seam with the welding length of 230mm,
in the sub-step c, on the first longitudinal joint, after the welded part of the deposited metal is cooled to be close to room temperature, the two sides of the welded joint are respectively separated by 240mm and are not welded, the length of 230mm is welded,
in the sub-step d, in the second longitudinal joint, after the welded part of the metal to be deposited is cooled to be close to room temperature, the two sides of the welded joint are respectively separated by 240mm and are not welded, the length of 230mm is welded,
e, repeating the substep c and the substep d until the limit length of the tube plate and the barrel part is reached;
step f, on the first longitudinal joint, after the welded part to be deposited metal is cooled to be close to room temperature, repairing welding the non-welded part, selecting the non-welded part from the middle to two sides, and selecting a section of non-welded part on each side for repairing welding;
step g, on the second longitudinal joint, after the welded part to be deposited metal is cooled to be close to room temperature, repairing welding the non-welded part, selecting the non-welded part from the middle to two sides, and selecting a section of non-welded part on each side for repairing welding;
and (h) repeating the substep f and the substep g until the two longitudinal joints are completely welded.
The tightening column is separated from the top block by pulling the nylon rope, and the welding anti-deformation device is pulled out of the special-shaped tube plate assembly by slowly pulling the nylon rope.
The quality of the two welding seams obtained by the assembly welding is detected to find that the welding seam quality is good, the quality requirement of nuclear power equipment is met, the dimensional accuracy of the tube plate assembly obtained by the assembly welding is detected to comprise roundness and deformation, the design requirement of the nuclear power equipment is found to be met, no damage such as scratch is found on the inner wall surface of the tube plate assembly, the assembly welding operation is proved to be successful satisfactorily, and the assembly welding task of the PCS heat exchanger tube plate assembly of Hualong number is completed.
The invention has been described above in connection with preferred embodiments, which are, however, exemplary only and for illustrative purposes. On this basis, the invention can be subjected to various substitutions and improvements, and all fall within the protection scope of the invention.
Claims (10)
1. The utility model provides a dysmorphism tube sheet subassembly dress welds preapring for an unfavorable turn of events shape device, its characterized in that, this preapring for an unfavorable turn of events shape device includes first arc board (1) and second arc board (2) that are swing joint each other, props up this barrel part from the inside of barrel part through first arc board (1) and second arc board (2), keeps dysmorphism tube sheet subassembly's circularity in barrel part and tube sheet longitudinal joint dress welding process.
2. The special-shaped tube plate assembly welding deformation preventing device according to claim 1, wherein,
a first pin shaft (3) is arranged at the joint of the first arc plate (1) and the second arc plate (2), and the first arc plate (1) and the second arc plate (2) are hinged through the first pin shaft (3).
3. The special-shaped tube plate assembly welding deformation preventing device according to claim 2, wherein,
a top block (4) is arranged on the first arc plate (1),
a connecting block (5) is arranged on the second arc plate (2),
the deformation preventing device also comprises a jacking column (6) and an articulated screw rod (7);
one end of the movable joint screw rod (7) is movably connected with the connecting block (5), the other end is screwed with the jacking column (6),
one end of the jacking column (6) is screwed with the movable joint screw rod (7), the other end of the jacking column is a spherical surface, and the spherical surface can be jacked on the jacking block (4).
4. The welding deformation preventing device for the special-shaped tube plate assembly according to claim 3, wherein,
when the circle center of the first arc plate (1) is overlapped with the circle center of the second arc plate (2), the first arc plate (1) and the second arc plate (2) form a large arc plate together, and the outer diameter size of the large arc plate is consistent with the inner diameter size of the special-shaped tube plate assembly.
5. The special-shaped tube plate assembly welding deformation preventing device according to claim 4, wherein,
the axis of the jacking column (6) and the axis of the movable joint screw rod (7) both pass through the circle center of the large arc plate.
6. The welding deformation preventing device for the special-shaped tube plate assembly according to claim 3, wherein,
an annular notch (61) is formed in the jacking column (6); and binding the nylon ropes on the jacking column (6) through the annular notch (61).
7. The special-shaped tube plate assembly welding deformation preventing device according to claim 1, wherein,
the special-shaped tube plate assembly is obtained by longitudinally seam welding a cylinder part and a tube plate;
the section of the cylinder part is in a major arc shape,
the section of the tube plate is in a minor arc shape, and at least two rows of through holes for installing the heat exchange tubes are formed in the tube plate.
8. The method for assembling and welding the special-shaped tube plate assembly is characterized by comprising the following steps of:
step 1, preparing and obtaining a tube plate and a barrel part, and finishing the dimensions so that after the tube plate and the barrel are assembled, when the inner contour of the cross section of the tube plate and the inner contour of the cross section of the barrel part are in a common circle, a preset assembly gap is reserved at each longitudinal seam;
step 2, adjusting the roundness of the tube plate and the cylinder part to enable the tube plate and the cylinder part to meet the design requirement;
step 3, installing the special-shaped tube plate assembly welding deformation preventing device according to the claims 1 to 7 in a cylinder part;
and step 4, symmetrically and sectionally welding longitudinal seams of the tube plate and the barrel part, and taking out the welding deformation preventing device after the welding is finished.
9. The method for assembling and welding a special-shaped tube plate assembly according to claim 8, wherein,
in step 1, the size of the assembly gap is 4-6 mm.
10. The method for assembling and welding a special-shaped tube plate assembly according to claim 9, wherein,
the step 3 comprises the following sub-steps:
step 1, binding a nylon rope on a tightening column (6), ensuring that one end of the nylon rope is outside a cylinder part, and placing the deformation preventing device inside the cylinder part;
a substep 2, propping the spherical end part of the propping column (6) against the jacking block (4), and enabling the first arc plate (1) and the second arc plate (2) to jointly prop up the cylinder part by screwing the movable joint screw rod (7);
and 3, screwing the movable joint screw rod (7) to enlarge the diameter size of a large arc plate formed by the first arc plate (1) and the second arc plate (2) until the diameter size of the large arc plate is consistent with the inner diameter size of the special-shaped tube plate assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311513600.3A CN117733387A (en) | 2023-11-14 | 2023-11-14 | Deformed tube plate assembly welding deformation preventing device and deformed tube plate assembly welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311513600.3A CN117733387A (en) | 2023-11-14 | 2023-11-14 | Deformed tube plate assembly welding deformation preventing device and deformed tube plate assembly welding method |
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| CN117733387A true CN117733387A (en) | 2024-03-22 |
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| CN202311513600.3A Pending CN117733387A (en) | 2023-11-14 | 2023-11-14 | Deformed tube plate assembly welding deformation preventing device and deformed tube plate assembly welding method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118438078A (en) * | 2024-07-08 | 2024-08-06 | 常州凯贝达机械科技有限公司 | Automatic straight seam welding machine |
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2023
- 2023-11-14 CN CN202311513600.3A patent/CN117733387A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118438078A (en) * | 2024-07-08 | 2024-08-06 | 常州凯贝达机械科技有限公司 | Automatic straight seam welding machine |
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