CN111168302A - Welding deformation control method for reactor core water replenishing tank support and end socket - Google Patents
Welding deformation control method for reactor core water replenishing tank support and end socket Download PDFInfo
- Publication number
- CN111168302A CN111168302A CN202010047319.5A CN202010047319A CN111168302A CN 111168302 A CN111168302 A CN 111168302A CN 202010047319 A CN202010047319 A CN 202010047319A CN 111168302 A CN111168302 A CN 111168302A
- Authority
- CN
- China
- Prior art keywords
- deformation
- welding
- tool
- plate
- heat treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to the technical field of welding, and provides a method for controlling welding deformation of a reactor core water replenishing tank support and an end socket, which comprises the following steps: preparing an anti-deformation tool; carrying out stress relief heat treatment on the anti-deformation tool; processing a limiting groove and a connecting through hole on the surface of the fixing plate; assembling the anti-deformation tool and the supporting leg assembly; assembling the supporting leg assembly with the end enclosure; welding the pillar and the end socket according to a welding process; after all the pillars are welded with the end sockets, performing stress relief heat treatment on the end sockets, the supporting leg assemblies and the anti-deformation tooling integrally; and after the heat treatment is finished, dismantling the anti-deformation tool. All the supporting leg assemblies are connected and fixed into a whole through the anti-deformation tool, the deformation condition of the asymmetric groove of the supporting column in the welding process is effectively controlled by utilizing the limit and self rigidity of the anti-deformation tool, and the integral stress relief heat treatment is carried out after the welding is finished, so that the form and position tolerance of the welded supporting column meets the design requirement of a drawing.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a welding deformation control method for a reactor core water replenishing tank support and an end enclosure.
Background
The reactor core water replenishing tank CMT is important emergency cooling equipment in a nuclear power station cooling system, plays a role of a common nuclear reactor high-pressure safety injection pump, and provides a cooling boric acid solution when an accident occurs to the nuclear reactor cooling system, so that the cooling of a reactor core is ensured, and the time required by the shutdown of the nuclear reactor is provided; it is a safety I-level and quality assurance I-level main device.
The reactor core water replenishing tank is vertical cylindrical container equipment and mainly formed by assembling and welding a spherical upper end enclosure, a cylinder body and a spherical lower end enclosure, for example, the design pressure is 17.2MPa, and the volume is 85m3The outer diameter of the cylinder of the reactor core water replenishing tank is phi 4726mm, the total length of the equipment reaches 8819mm, and the total weight of the equipment reaches 170 tons. In order to transmit the static load and the dynamic load of the whole reactor core water supplementing tank to the foundation, eight supporting leg assemblies are welded at the bottom of a spherical lower end socket of the reactor core water supplementing tank and comprise a supporting column and a bottom plate, one end of the supporting column is welded with the bottom of the lower end socket, and the other end of the supporting column is welded with the bottom plate.
Because the on-site foundation and the reactor core water replenishing tank device are manufactured separately, in the installation process of the reactor core water replenishing tank, in order to avoid unnecessary stress concentration caused by interference between foundation bolts embedded in the on-site foundation and a bottom plate of the supporting leg assembly, the design drawing requires that the post-welding heat treatment is carried out after the lower head and the supporting column are assembled and welded, and the coaxiality of the lower head and the supporting column after the heat treatment is less than or equal to phi 4mm, so that the stress concentration caused by deformation in the installation process is reduced or even eliminated.
In order to ensure the welding quality, a full penetration structure is required to be adopted for a welding seam between the support column and the lower seal head, therefore, a groove is formed in one end, welded with the seal head, of the support column, the groove belongs to a variable-angle special-shaped groove and is of an asymmetric structure, the groove of the structure is easy to generate large welding deformation in the welding process, the design requirements of products cannot be met, eight support columns are respectively welded, the single deformation condition is inconsistent, and the requirements of all support column position degrees cannot be met.
In the patent application with application number 201821383791.0, entitled deformation control device for welding tubular parts on end socket cambered surfaces, the following contents are disclosed: comprising a rigid ring and a plurality of adjustment structures; the plurality of adjusting structures are uniformly distributed along the periphery of the rigid ring; each adjusting structure comprises a height adjusting plate, a side adjusting strip, a radial adjusting strip and an angle adjuster. This patent application discloses a shape frock of preapring for an unfavorable turn of events substantially, when tubulose and head welding, adjusts the relative position of tubulose and head through this frock, treats to adjust the back that targets in place, locks the relative position of tubulose and head through this frock, welds again. In the welding process, the tubular part is controlled from six freedom directions through the height adjusting plate, the side adjusting strip, the radial adjusting strip and the angle adjuster, so that the control of welding seam deformation is realized.
Although the deformation-preventing tool in the patent is adopted, the welding deformation can be controlled within a reasonable range, the deformation-preventing tool can not meet the requirement that the coaxiality of the lower head and the support post after heat treatment is less than or equal to phi 4mm when the deformation-preventing tool is applied to the welding process of the spherical lower head and the support leg assembly in the reactor core water replenishing tank, and an inventor cannot know the deformation-preventing tool. Therefore, when a spherical lower head and a supporting leg assembly in a reactor core water replenishing tank are welded, the inventor controls welding deformation through the deformation prevention tool, heat treatment is carried out after welding is finished, then the coaxiality of the lower head and a supporting column is detected, the detection results are within phi 6-phi 9mm, and the design requirement that the coaxiality of the lower head and the supporting column is less than or equal to phi 4mm cannot be met. Through detecting the discovery to the deformation frock of preapring for an unfavorable turn of events after the welding is accomplished, the side adjustment strip and the radial adjustment strip in the deformation frock of preapring for an unfavorable turn of events have taken place to remove, and then have caused the unsatisfied design requirement of welding deformation.
From the above, when the spherical lower head and the supporting leg assembly in the reactor core water replenishing tank are welded, the requirement that the coaxiality of the lower head and the supporting column after heat treatment is less than or equal to phi 4mm cannot be met when the existing deformation-preventing tool is adopted for controlling the welding deformation.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for controlling the welding deformation of a core water replenishing tank support and an end socket, and ensuring that the coaxiality of the end socket and the support after heat treatment is less than or equal to phi 4 mm.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for controlling the welding deformation of the core water replenishing tank support and the end socket comprises the following steps:
s1, preparing an anti-deformation tool; the deformation-preventing tool comprises an annular steel plate and fixing seats which are uniformly distributed on the circumference of the annular steel plate; the number of the fixed seats is consistent with that of the supporting leg assemblies; each fixing seat comprises a fixing plate arranged in parallel to the surface of the annular steel plate and a supporting piece welded between the fixing plate and the annular steel plate;
s2, after the anti-deformation tool is prepared, carrying out stress relief heat treatment on the anti-deformation tool; after the heat treatment is finished, according to the requirements of design drawings, firstly, processing a limiting groove for limiting the bottom plate of the landing leg assembly on the surface of each fixing plate, and then processing a connecting through hole corresponding to the foundation bolt hole on the bottom plate at the bottom of the limiting groove;
s3, assembling the anti-deformation tool and the leg assembly; firstly, placing a bottom plate of each leg assembly into a corresponding limiting groove, and then connecting the bottom plate with a fixed plate through a bolt structure;
s4, reversely buckling the end socket on the assembly platform, and adjusting the connecting end of the end socket to a horizontal position;
s5, integrally hoisting the anti-deformation tool and the leg assembly to the position above the end socket, and enabling the leg assembly to be located between the end socket and the anti-deformation tool; then the deformation-preventing tool and the supporting leg assembly are supported through the jack supporting assembly; adjusting a groove gap between a support column and an end enclosure in the support leg assembly through the jack support assembly until the groove gap meets the welding requirement, and then spot-welding the support column and the end enclosure;
s6, welding the support and the end enclosure according to a welding process;
s7, after all the pillars are welded with the end sockets, performing stress relief heat treatment on the end sockets, the leg assemblies and the deformation prevention tool integrally; and after the heat treatment is finished, dismantling the anti-deformation tool.
Further, in step S1, the supporting member includes two vertical plates disposed in parallel; the two ends of each vertical plate are respectively welded with the fixed plate and the annular steel plate.
Furthermore, the supporting piece also comprises a rib plate welded with each vertical plate.
Further, the height of the vertical plate is the same as that of the rib plate, and is greater than or equal to 200 mm.
Furthermore, the thickness of the annular steel plate is T1, wherein T1 is more than or equal to 120 mm.
Further, the thickness of the fixing plate is T2, wherein T2 is more than or equal to 90 mm; the depth of the limiting groove is T3, wherein 50mm is more than or equal to T3 and more than or equal to 30 mm.
Further, in step S2, forming a vent hole corresponding to the central hole on the bottom plate at the bottom of the limiting groove.
The invention has the beneficial effects that: according to the welding deformation control method for the core water replenishing tank support and the end socket, all the support leg assemblies are connected and fixed into a whole through the deformation prevention tool, the deformation condition of the asymmetric groove of the support column in the welding process is effectively controlled by using the limit and the self rigidity of the deformation prevention tool, and the heat treatment for integrally eliminating stress is carried out after the welding is finished, so that the coaxiality of the end socket and the support column after the heat treatment is ensured to be less than or equal to phi 4 mm.
Drawings
FIG. 1 is a schematic structural view of a post and a head after welding is completed;
FIG. 2 is a view taken from the direction A of FIG. 1;
FIG. 3 is a schematic structural diagram of a deformation prevention tool in an embodiment of the invention;
FIG. 4 is a cross-sectional view B-B of FIG. 3;
FIG. 5 is a cross-sectional view C-C of FIG. 3;
fig. 6 is a state diagram of the welding of the pillar and the header by the method of the embodiment of the invention.
The reference numbers in the figures are: 10-deformation-preventing tool, 20-leg component, 30-end socket, 40-assembly platform, 50-jack support component, 101-annular steel plate, 102-fixing seat, 103-fixing plate, 104-supporting piece, 201-bottom plate, 202-support column, 301-connecting end, 1031-limiting groove, 1032-connecting through hole, 1033-air hole, 1041-vertical plate, 1042-rib plate, 2011-foundation bolt hole and 2012-central hole.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The method for controlling the welding deformation of the core water replenishing tank support and the end socket comprises the following steps:
s1, preparing the anti-deformation tool 10; the anti-deformation tool 10 comprises an annular steel plate 101 and fixing seats 102 which are uniformly distributed on the surface of the annular steel plate 101 in the circumferential direction; the number of the fixing seats 102 is consistent with that of the leg assemblies 20; each fixing seat 102 comprises a fixing plate 103 arranged parallel to the surface of the annular steel plate 101, and a supporting piece 104 welded between the fixing plate 103 and the annular steel plate 101;
s2, after the anti-deformation tool 10 is prepared, carrying out stress relief heat treatment on the anti-deformation tool 10; after the heat treatment is finished, according to the requirements of design drawings, firstly, a limiting groove 1031 for limiting the bottom plate 201 of the leg assembly 20 is processed on the surface of each fixing plate 103, and then a connecting through hole 1032 corresponding to a foundation bolt hole 2011 on the bottom plate 201 is processed at the bottom of the limiting groove 1031;
s3, assembling the anti-deformation tool 10 and the leg assembly 20; firstly, the bottom plate 201 of each leg assembly 20 is placed in the corresponding limiting groove 1031, and then the bottom plate 201 is connected with the fixing plate 103 through a bolt structure;
s4, reversely buckling the end socket 30 on the assembly platform 40, and adjusting the connecting end 301 of the end socket 30 to a horizontal position;
s5, integrally hoisting the anti-deformation tool 10 and the leg assembly 20 to the position above the end socket 30, and enabling the leg assembly 20 to be located between the end socket 30 and the anti-deformation tool 10; then, the deformation-preventing tool 10 and the leg assembly 20 are supported by the jack support assembly 50; adjusting a groove gap between the support column 202 and the end socket 30 in the support leg assembly 20 through the jack support assembly 50 until the groove gap meets the welding requirement, and then spot-welding the support column 202 and the end socket 30;
s6, welding the support column 202 and the end enclosure 30 according to a welding process;
s7, after all the pillars 202 and the end socket 30 are welded, performing stress relief heat treatment on the end socket 30, the leg assembly 20 and the deformation-preventing tool 10 integrally; and after the heat treatment is finished, the anti-deformation tool 10 is detached.
For convenience of description, the terms "upper", "lower", "left" and "right" are used in the same direction as the upper, lower, left and right directions of the drawings themselves, but do not limit the structure of the present invention.
As shown in fig. 1 and 2, the sealing head 30 is a spherical sealing head, the leg assemblies 20 are uniformly welded on the outer surface of the sealing head 30, and each leg assembly 20 includes a bottom plate 201 and a support column 202. As shown in fig. 1, the support column 202 is made of a steel pipe, the upper end of the support column 202 is a to-be-welded end connected with the seal head 30, the to-be-welded end is finished with an outer groove according to a drawing, the lower end of the support column 202 is welded with the upper surface of the bottom plate 201, and a central line of the support column 202 is perpendicular to the upper surface of the bottom plate 201.
As shown in fig. 1 and 2, the bottom plate 201 is made of a steel plate, and the surface of the bottom plate 201 is square or rectangular; four anchor bolt holes 2011 are formed in the bottom plate 201 and positioned outside the strut 202; the center of the bottom plate 201 is provided with a center hole 2012 communicated with the inner cavity of the pillar 202, and the center hole 2012 is a fabrication hole and has the function of preventing the inner cavity of the pillar 202 from forming a closed space in the welding process, so as to avoid pressure difference between the inside and the outside of the pillar 202.
Fig. 3 to 5 illustrate an embodiment of a deformation prevention tool 10, wherein the deformation prevention tool 10 mainly includes an annular steel plate 101 and a fixing seat 102. The inner circle diameter of the annular steel plate 101 is determined according to the distribution diameter of the support column 202 on the seal head 30, the width of the annular steel plate is determined by the width of the bottom plate 201, and the thickness of the annular steel plate is calculated according to the strength of the annular steel plate 101, so that the annular steel plate is ensured to be rigid enough to support the stress caused by welding deformation of the support column 202. The thickness of the annular steel plate 101 is T1, wherein T1 is more than or equal to 120 mm. The number of the fixing seats 102 is the same as that of the leg assemblies 20, and the fixing seats 102 are uniformly welded on the surface of the annular steel plate 101 in the circumferential direction.
As shown in fig. 3 to 5, each fixing seat 102 includes a fixing plate 103 and a supporting member 104, the fixing plate 103 is made of a steel plate, the shape of the fixing plate 103 is matched with the shape of the bottom plate 201, the size of the fixing plate 103 is larger than that of the bottom plate 201, the thickness of the fixing plate 103 is determined by strength calculation, and the thickness of the fixing plate 103 is T2, wherein T2 is greater than or equal to 90 mm. An embodiment of the support 104 is shown in fig. 5, the support 104 includes two vertical plates 1041 arranged in parallel; two ends of each vertical plate 1041 are respectively welded with the fixing plate 103 and the annular steel plate 101; further, the support 104 further includes a rib plate 1042 welded to each vertical plate 1041, and the vertical plate 1041 and the rib plate 1042 have the same height, which is greater than or equal to 200 mm. Each support 104 is described below with reference to fig. 5, the vertical plate 1041 and the rib plate 1042 are made of steel plates, and the thickness thereof is determined by calculating the strength; the vertical plate 1041 and the rib plate 1042 are arranged vertically, the upper end of the vertical plate 1041 is welded with the fixing plate 103, and the lower end of the vertical plate 1041 is welded with the annular steel plate 101; the upper end of the rib plate 1042 is welded with the fixing plate 103, the lower end of the rib plate 1042 is welded with the annular steel plate 101, the two vertical plates 1041 are arranged between the two rib plates 1042, the rib plate 1042 at the left side is welded with the vertical plate 1041 at the left side, and the rib plate 1042 at the right side is welded with the vertical plate 1041 at the right side.
In step S1, preparing the deformation preventing tool 10; firstly, an annular steel plate 101, a fixed plate 103, a vertical plate 1041 and a rib plate 1042 are respectively processed according to a drawing; and then, assembling, fixing and welding the parts according to a drawing, and further completing the preparation of the anti-deformation tool 10.
In the step S2, after the anti-deformation tool 10 is manufactured, the anti-deformation tool 10 is subjected to stress relief heat treatment, and the welding stress in the anti-deformation device 10 is relieved through the heat treatment, so that the deformation of the anti-deformation tool 10 due to the welding stress in the subsequent use process is avoided. After the heat treatment is completed, the position limiting grooves 1031 and the connecting through holes 1032 are finished on each fixing plate 103, so that the precision of the position limiting grooves 1031 and the connecting through holes 1032 can be ensured, and the position of the position limiting grooves 1031 and the position of the connecting through holes 1032 can be prevented from changing. Further, the bottom of the limiting groove 1031 is provided with an air hole 1033 corresponding to the central hole 2012 in the bottom plate 201; that is, after the bottom plate 201 is placed in the limiting groove 1031, the air holes 1033 correspond to and communicate with the central hole 2012.
In step S3, assembling the deformation preventing tool 10 and the leg assembly 20; firstly, the bottom plate 201 of each leg assembly 20 is placed in the corresponding limiting groove 1031, so that the side wall of the limiting groove 1031 is in contact with the side edge of the bottom plate 201, and the bottom plate 201 is limited; the depth of the limiting groove 1031 is T3, wherein 50mm is more than or equal to T3 is more than or equal to 30 mm. The limiting groove 1031 may have four side walls, and the four side walls limit four sides of the bottom plate 201 respectively. Fig. 3 shows another embodiment of the limiting groove 1031, in which the limiting groove 1031 has three side walls, the three side walls limit three sides of the bottom plate 201 respectively, and the three side walls of the limiting groove 1031 should be arranged in the direction of the maximum three deformation amounts of the bottom plate 201 respectively to limit the bottom plate 201. The bottom plate 201 and the fixing plate 103 are connected through a bolt structure, specifically, a bolt sequentially penetrates through a foundation bolt hole 2011 on the bottom plate 201 and a connecting through hole 1032 on the fixing plate 103, and a nut is screwed at the end of the bolt, so that the connection between the bottom plate 201 and the fixing plate 103 is realized.
In step S4, as shown in fig. 6, the sealing head 30 is turned over on the mounting platform 40, and the connecting end 301 of the sealing head 30 is adjusted to a horizontal position. The connecting end 301 of the end socket 30 refers to the end connected with the cylinder, and after the end socket 30 is reversely buckled on the assembling platform 40, the connecting end 301 of the end socket 30 is adjusted to be in a horizontal position in a mode of arranging a sizing block between the connecting end 301 of the end socket 30 and the assembling platform 40.
In step S5, the jack support assembly 50 plays a role of supporting and adjusting the height, and fig. 6 shows an embodiment of the jack support assembly 50, which includes a support beam vertically disposed and having a bottom connected to the assembly platform 40, a jack fixed on the top of the support beam, and a connection beam disposed above the jack and used for connecting with the annular steel plate 101 in the deformation prevention tool 10. During assembly, as shown in fig. 6, a plurality of supporting beams are uniformly arranged on the assembly platform 40 around the circumference of the end enclosure 30, a jack is arranged at the top of each supporting beam, and a plurality of connecting beams are uniformly arranged on the circumference of the circumferential surface of the annular steel plate 101; then integrally hoisting the anti-deformation tool 10 and the leg assembly 20 to the position above the end socket 30, and enabling the leg assembly 20 to be located between the end socket 30 and the anti-deformation tool 10; the connecting beam is supported on the corresponding jacks, then the groove gap between the support column 202 and the seal head 30 in the leg component 20 can be adjusted and fine-tuned through the plurality of jacks until the groove gap meets the welding requirement, and then the support column 202 and the seal head 30 are subjected to spot welding to complete the pairing operation between the leg component 20 and the seal head 30.
In step S6, the pillar 202 and the header 30 are welded by a welding process. Specifically, the groove to be welded is integrally preheated, then welding is performed according to a welding process, and a certain welding sequence, such as interval welding, symmetrical welding and the like, is adopted for a plurality of welding joints in the welding process so as to reduce welding deformation.
In step S7, after all the pillars 202 and the end sockets 30 are welded, the stress relief heat treatment is performed on the entire end sockets 30, the leg assemblies 20, and the deformation prevention tooling 10 without removing the deformation prevention tooling 10, so as to relieve the welding stress between the pillars 202 and the end sockets 30 and reduce the welding deformation. After the heat treatment is completed, the anti-deformation tool 10 can be detached, so that the welding work of the supporting leg assembly 20 and the end socket 30 is completed.
According to the welding deformation control method for the core water replenishing tank support and the end socket, all the support leg assemblies 20 are connected and fixed into a whole through the deformation preventing tool 10, the deformation condition of the asymmetric groove of the support column 202 in the welding process is effectively controlled by using the limit and the self rigidity of the deformation preventing tool 10, and the heat treatment for integrally eliminating stress is carried out after the welding is finished, so that the coaxiality of the end socket 30 and the support column 202 after the welding is finished is ensured to meet the design requirements of drawings. The method can realize the welding deformation control of the reactor core water replenishing tank support 202, greatly improve the welding efficiency of the support 202, effectively ensure the product quality, solve the problem of welding deformation control of the asymmetric groove, simultaneously, the deformation prevention tool 10 can be manufactured by using a common steel plate, can be put into use by simple assembly welding and processing, has low manufacturing cost and short manufacturing period, and can meet the actual requirement.
Example (b):
the design pressure of the existing water replenishing tank with a pile core is 17.2MPa, and the volume is 85m3The outer diameter of the cylinder body is phi 4726mm, the inner diameter of the cylinder body is phi 4258mm, and the wall thickness of the seal head 30 is 150 mm.
The number of the leg assemblies 20 is eight, the size of the bottom plate 201 in each leg assembly 20 is 600 multiplied by 83mm, and each bottom plate 201 is provided with 4 foundation bolt holes 2011 with the diameter of 100mm and 1 central hole 2012 with the diameter of 51 mm; the dimension of the pillar 202 is phi 355 x 45 mm.
The design requirement of the reactor core water replenishing tank is as follows: and (3) performing postweld heat treatment after the end socket 30 and the support column 202 are welded, wherein the coaxiality of the end socket 30 and the support column 202 after the heat treatment is less than or equal to phi 4 mm.
Example 1:
the leg assembly 20 and the end socket 30 of the reactor core makeup tank in the embodiment are welded according to the following steps:
s1, designing the deformation prevention tool 10 according to the strength calculation, then preparing each part in the deformation prevention tool 10, and then welding each part according to the assembly relation in the design drawing to complete the welding work of the deformation prevention tool 10;
s2, stress relief heat treatment is carried out on the deformation preventing tool 10; after the heat treatment is completed, finishing a limiting groove 1031 and a connecting through hole 1032 on the surface of each fixing plate 103 according to a design drawing;
s3, placing the bottom plate 201 in each leg assembly 20 into the limiting groove 1031, and connecting the bottom plate 201 with the fixing plate 103 through bolts;
s4, reversely buckling the end socket 30 on the assembly platform 40, and adjusting the connecting end 301 of the end socket 30 to a horizontal position;
s5, integrally hoisting the anti-deformation tool 10 and the supporting leg assembly 20 to the position above the end enclosure 30, adjusting the groove gap between the supporting column 202 and the end enclosure 30 in the supporting leg assembly 20 through the jack supporting assembly 50 until the groove gap meets the welding requirement, and then spot-welding the supporting column 202 and the end enclosure 30 to finish the assembly work of the supporting column 202 and the end enclosure 30;
s6, welding the support column 202 and the end enclosure 30 according to a welding process;
s7, after all the pillars 202 and the seal head 30 are welded, performing integral stress relief heat treatment on the seal head 30, the leg assemblies 20 and the deformation preventing tool 10, and after the heat treatment is completed, removing the deformation preventing tool 10.
After the anti-deformation tool 10 is removed and the equipment is stood for a period of time, the deformation condition of the strut 202 is measured, and the result is as follows: the coaxiality of the end socket 30 and the support column 202 is less than or equal to phi 3mm, and the design requirement is met.
Comparative example 1:
the leg assembly 20 and the end socket 30 of the reactor core makeup tank in the embodiment are welded according to the following steps:
s1, designing the deformation prevention tool 10 according to the strength calculation, then preparing each part in the deformation prevention tool 10, and then welding each part according to the assembly relation in the design drawing to complete the welding work of the deformation prevention tool 10; then, a limiting groove 1031 and a connecting through hole 1032 are finished on the surface of each fixing plate 103;
s2, placing the bottom plate 201 in each leg assembly 20 into the limiting groove 1031, and connecting the bottom plate 201 with the fixing plate 103 through bolts;
s3, reversely buckling the end socket 30 on the assembly platform 40, and adjusting the connecting end 301 of the end socket 30 to a horizontal position;
s4, integrally hoisting the anti-deformation tool 10 and the supporting leg assembly 20 to the position above the end enclosure 30, adjusting the groove gap between the supporting column 202 and the end enclosure 30 in the supporting leg assembly 20 through the jack supporting assembly 50 until the groove gap meets the welding requirement, and then spot-welding the supporting column 202 and the end enclosure 30 to finish the assembly work of the supporting column 202 and the end enclosure 30;
s5, welding the support column 202 and the end enclosure 30 according to a welding process; after all the pillars 202 and the end sockets 30 are welded, the anti-deformation tool 10 is disassembled; the header 30 and leg assembly 20 are then subjected to an integral stress relief heat treatment.
After the heat treatment is completed and the equipment is left standing for a period of time, the deformation of the support column 202 is measured, and the result is: the coaxiality of the end socket 30 and the support column 202 is phi 8mm, and the design requirement is not met.
Comparative example 2:
the leg assembly 20 and the end socket 30 of the reactor core makeup tank in the embodiment are welded according to the following steps:
s1, designing the deformation prevention tool 10 according to the strength calculation, then preparing each part in the deformation prevention tool 10, and then welding each part according to the assembly relation in the design drawing to complete the welding work of the deformation prevention tool 10; then, a limiting groove 1031 and a connecting through hole 1032 are finished on the surface of each fixing plate 103;
s2, placing the bottom plate 201 in each leg assembly 20 into the limiting groove 1031, and connecting the bottom plate 201 with the fixing plate 103 through bolts;
s3, reversely buckling the end socket 30 on the assembly platform 40, and adjusting the connecting end 301 of the end socket 30 to a horizontal position;
s4, integrally hoisting the anti-deformation tool 10 and the supporting leg assembly 20 to the position above the end enclosure 30, adjusting the groove gap between the supporting column 202 and the end enclosure 30 in the supporting leg assembly 20 through the jack supporting assembly 50 until the groove gap meets the welding requirement, and then spot-welding the supporting column 202 and the end enclosure 30 to finish the assembly work of the supporting column 202 and the end enclosure 30;
s5, welding the support column 202 and the end enclosure 30 according to a welding process;
s6, after all the pillars 202 and the seal head 30 are welded, performing integral stress relief heat treatment on the seal head 30, the leg assemblies 20 and the deformation preventing tool 10, and after the heat treatment is completed, removing the deformation preventing tool 10.
After the anti-deformation tool 10 is removed and the equipment is stood for a period of time, the deformation condition of the strut 202 is measured, and the result is as follows: the coaxiality of the end socket 30 and the support column 202 is phi 7mm, and the design requirement is not met.
Comparative example 3:
the leg assembly 20 and the end socket 30 of the reactor core makeup tank in the embodiment are welded according to the following steps:
s1, designing the deformation prevention tool 10 according to the strength calculation, then preparing each part in the deformation prevention tool 10, and then welding each part according to the assembly relation in the design drawing to complete the welding work of the deformation prevention tool 10;
s2, stress relief heat treatment is carried out on the deformation preventing tool 10; after the heat treatment is finished, a connecting through hole 1032 is finely processed on the surface of each fixing plate 103 according to a design drawing;
s3, connecting the bottom plate 201 of each leg assembly 20 with the fixing plate 103 through bolts;
s4, reversely buckling the end socket 30 on the assembly platform 40, and adjusting the connecting end 301 of the end socket 30 to a horizontal position;
s5, integrally hoisting the anti-deformation tool 10 and the supporting leg assembly 20 to the position above the end enclosure 30, adjusting the groove gap between the supporting column 202 and the end enclosure 30 in the supporting leg assembly 20 through the jack supporting assembly 50 until the groove gap meets the welding requirement, and then spot-welding the supporting column 202 and the end enclosure 30 to finish the assembly work of the supporting column 202 and the end enclosure 30;
s6, welding the support column 202 and the end enclosure 30 according to a welding process;
s7, after all the pillars 202 and the seal head 30 are welded, performing integral stress relief heat treatment on the seal head 30, the leg assemblies 20 and the deformation preventing tool 10, and after the heat treatment is completed, removing the deformation preventing tool 10.
After the anti-deformation tool 10 is removed and the equipment is stood for a period of time, the deformation condition of the strut 202 is measured, and the result is as follows: the coaxiality of the end socket 30 and the support column 202 is phi 6mm, and the design requirement is not met.
Comparative example 4:
the leg assembly 20 and the end socket 30 of the reactor core makeup tank in the embodiment are welded according to the following steps:
s1, designing the deformation prevention tool 10 according to the strength calculation, then preparing each part in the deformation prevention tool 10, and then welding each part according to the assembly relation in the design drawing to complete the welding work of the deformation prevention tool 10;
s2, stress relief heat treatment is carried out on the deformation preventing tool 10; after the heat treatment is completed, finishing a limiting groove 1031 and a connecting through hole 1032 on the surface of each fixing plate 103 according to a design drawing;
s3, placing the bottom plate 201 in each leg assembly 20 into the limiting groove 1031, and connecting the bottom plate 201 with the fixing plate 103 through bolts;
s4, reversely buckling the end socket 30 on the assembly platform 40, and adjusting the connecting end 301 of the end socket 30 to a horizontal position;
s5, integrally hoisting the anti-deformation tool 10 and the supporting leg assembly 20 to the position above the end enclosure 30, adjusting the groove gap between the supporting column 202 and the end enclosure 30 in the supporting leg assembly 20 through the jack supporting assembly 50 until the groove gap meets the welding requirement, and then spot-welding the supporting column 202 and the end enclosure 30 to finish the assembly work of the supporting column 202 and the end enclosure 30;
s6, welding the support column 202 and the end enclosure 30 according to a welding process;
s7, after all the pillars 202 and the end sockets 30 are welded, the anti-deformation tool 10 is detached; the header 30 and leg assembly 20 are then subjected to an integral stress relief heat treatment.
After the heat treatment is completed and the equipment is left standing for a period of time, the deformation of the support column 202 is measured, and the result is: the coaxiality of the end socket 30 and the support column 202 is phi 7mm, and the design requirement is not met.
Claims (7)
1. The method for controlling the welding deformation of the core water replenishing tank support and the end socket is characterized by comprising the following steps of:
s1, preparing an anti-deformation tool (10); the deformation-preventing tool (10) comprises an annular steel plate (101) and fixing seats (102) which are uniformly distributed on the circumference of the annular steel plate (101); the number of the fixed seats (102) is consistent with that of the leg assemblies (20); each fixing seat (102) comprises a fixing plate (103) arranged in parallel to the surface of the annular steel plate (101), and a supporting piece (104) welded between the fixing plate (103) and the annular steel plate (101);
s2, after the anti-deformation tool (10) is prepared, carrying out stress relief heat treatment on the anti-deformation tool (10); after the heat treatment is finished, according to the requirements of design drawings, firstly, a limiting groove (1031) for limiting the bottom plate (201) of the leg assembly (20) is processed on the surface of each fixing plate (103), and then a connecting through hole (1032) corresponding to a foundation bolt hole (2011) in the bottom of the limiting groove (1031) is processed;
s3, assembling the anti-deformation tool (10) and the supporting leg assembly (20); firstly, placing a bottom plate (201) of each leg component (20) into a corresponding limiting groove (1031), and then connecting the bottom plate (201) with a fixing plate (103) through a bolt structure;
s4, reversely buckling the end socket (30) on the assembly platform (40), and adjusting the connecting end (301) of the end socket (30) to a horizontal position;
s5, integrally hoisting the anti-deformation tool (10) and the leg assembly (20) to the position above the end enclosure (30), and enabling the leg assembly (20) to be located between the end enclosure (30) and the anti-deformation tool (10); then the deformation-preventing tool (10) and the supporting leg assembly (20) are supported through a jack supporting assembly (50); adjusting a groove gap between a support column (202) and an end enclosure (30) in the support leg assembly (20) through a jack support assembly (50) until the groove gap meets the welding requirement, and then spot-welding the support column (202) and the end enclosure (30);
s6, welding the support column (202) and the end enclosure (30) according to a welding process;
s7, after all the pillars (202) are welded with the end enclosure (30), integrally performing stress relief heat treatment on the end enclosure (30), the supporting leg assembly (20) and the deformation-preventing tool (10); and after the heat treatment is finished, the anti-deformation tool (10) is disassembled.
2. The core makeup tank support and head welding deformation control method according to claim 1, wherein in step S1, said support (104) comprises two vertical plates (1041) arranged in parallel; two ends of each vertical plate (1041) are respectively welded with the fixing plate (103) and the annular steel plate (101).
3. The core makeup tank support and head welding deformation control method according to claim 2, wherein the support (104) further comprises a rib plate (1042) welded to each vertical plate (1041).
4. The core makeup tank support and seal head welding deformation control method according to claim 3, wherein the vertical plate (1041) and the rib plate (1042) have the same height and are greater than or equal to 200 mm.
5. The method for controlling the welding deformation of the core water replenishing tank support and the end socket according to claim 1, wherein the thickness of the annular steel plate (101) is T1, wherein T1 is more than or equal to 120 mm.
6. The welding deformation control method for the core makeup water tank support and the end socket according to claim 1, 2, 3, 4 or 5, characterized in that the thickness of the fixing plate (103) is T2, wherein T2 is more than or equal to 90 mm; the depth of the limiting groove (1031) is T3, wherein 50mm is more than or equal to T3 more than or equal to 30 mm.
7. The core makeup tank support and head welding deformation control method according to claim 1, wherein in step S2, the method further comprises machining a vent hole (1033) in the bottom of the limiting groove (1031) to correspond to the central hole (2012) in the bottom plate (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010047319.5A CN111168302A (en) | 2020-01-16 | 2020-01-16 | Welding deformation control method for reactor core water replenishing tank support and end socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010047319.5A CN111168302A (en) | 2020-01-16 | 2020-01-16 | Welding deformation control method for reactor core water replenishing tank support and end socket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111168302A true CN111168302A (en) | 2020-05-19 |
Family
ID=70619160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010047319.5A Pending CN111168302A (en) | 2020-01-16 | 2020-01-16 | Welding deformation control method for reactor core water replenishing tank support and end socket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111168302A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113319461A (en) * | 2021-06-25 | 2021-08-31 | 中国船舶重工集团柴油机有限公司 | Method for welding oil supply unit shell of large marine dual-fuel diesel engine |
| CN113664402A (en) * | 2021-08-18 | 2021-11-19 | 江苏三星能源装备有限公司 | Assembling method for three saddles of large-scale pressure vessel tank body |
| CN114908236A (en) * | 2021-02-10 | 2022-08-16 | 天津重型装备工程研究有限公司 | Deformation-preventing tool and deformation-preventing method for heat treatment of oversized cake-shaped forge piece |
| CN114990314A (en) * | 2021-03-01 | 2022-09-02 | 天津重型装备工程研究有限公司 | Heat treatment anti-deformation tool and anti-deformation method for oversized cylindrical forging |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202741970U (en) * | 2012-07-24 | 2013-02-20 | 哈电集团（秦皇岛）重型装备有限公司 | Shell cover vertical type multiple-strut welding anti-deformation device |
| CN204108533U (en) * | 2014-05-22 | 2015-01-21 | 江联重工股份有限公司 | Anti-spherical shell steel plates welding deformation frock |
| CN207953038U (en) * | 2018-01-29 | 2018-10-12 | 无锡海核装备科技有限公司 | Anti-deformation tool is welded in spherical surface head opening |
-
2020
- 2020-01-16 CN CN202010047319.5A patent/CN111168302A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202741970U (en) * | 2012-07-24 | 2013-02-20 | 哈电集团（秦皇岛）重型装备有限公司 | Shell cover vertical type multiple-strut welding anti-deformation device |
| CN204108533U (en) * | 2014-05-22 | 2015-01-21 | 江联重工股份有限公司 | Anti-spherical shell steel plates welding deformation frock |
| CN207953038U (en) * | 2018-01-29 | 2018-10-12 | 无锡海核装备科技有限公司 | Anti-deformation tool is welded in spherical surface head opening |
Non-Patent Citations (2)
| Title |
|---|
| 刘玉平等: "《CAP1400 堆芯补水箱支承柱组件与封头焊接技术研究》", 《大型铸锻件》 * |
| 王永明等: "《一种封头多支柱焊接防变形工装的研究与应用》", 《科技创新与应用》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114908236A (en) * | 2021-02-10 | 2022-08-16 | 天津重型装备工程研究有限公司 | Deformation-preventing tool and deformation-preventing method for heat treatment of oversized cake-shaped forge piece |
| CN114908236B (en) * | 2021-02-10 | 2023-08-04 | 天津重型装备工程研究有限公司 | Anti-deformation tool and anti-deformation method for heat treatment of ultra-large cake-shaped forge piece |
| CN114990314A (en) * | 2021-03-01 | 2022-09-02 | 天津重型装备工程研究有限公司 | Heat treatment anti-deformation tool and anti-deformation method for oversized cylindrical forging |
| CN114990314B (en) * | 2021-03-01 | 2023-08-04 | 天津重型装备工程研究有限公司 | Heat treatment anti-deformation tool and anti-deformation method for oversized cylindrical forging |
| CN113319461A (en) * | 2021-06-25 | 2021-08-31 | 中国船舶重工集团柴油机有限公司 | Method for welding oil supply unit shell of large marine dual-fuel diesel engine |
| CN113319461B (en) * | 2021-06-25 | 2022-06-07 | 中国船舶重工集团柴油机有限公司 | Method for welding oil supply unit shell of large marine dual-fuel diesel engine |
| CN113664402A (en) * | 2021-08-18 | 2021-11-19 | 江苏三星能源装备有限公司 | Assembling method for three saddles of large-scale pressure vessel tank body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111168302A (en) | Welding deformation control method for reactor core water replenishing tank support and end socket | |
| CN102689736B (en) | Special supporting device of cover head of nuclear island containment vessel made of steel and transportation method | |
| CN106448751B (en) | A kind of HTGR metal in-pile component reactor core shell supporting structure and installation method | |
| CN113404059A (en) | Supporting structure capable of automatically regulating deformation and implementation method thereof | |
| CN206075826U (en) | HTGR metal in-pile component reactor core shell supporting structure | |
| CN211735107U (en) | Tool structure for manufacturing and adjusting free camber of steel box bridge | |
| CN109736439A (en) | Welding procedure method after annular Core Walls Structure column braces across center support frame greatly | |
| CN110877182B (en) | Welding tool for assembling and welding pantograph mounting seat and welding method for pantograph mounting seat | |
| CN205437604U (en) | Real empty room midplane window in large -scale double -deck D type cross -section and supporting shoe assembly welding device | |
| CN107695551B (en) | Assembly method of ring beam | |
| CN107507658B (en) | Assembling method of steel containment vessel top head of nuclear power station | |
| CN218193483U (en) | Jig for welding tire of three driving frames | |
| CN107215576B (en) | Vertical offshore tank | |
| CN102019512B (en) | Butt welding construction method for T-shaped column | |
| CN206768781U (en) | Cleat stanchion integral type steel tubular bank protection structure assembly moulding bed | |
| CN215750975U (en) | Gantry hydraulic press frame | |
| CN218657267U (en) | Submerged arc automatic welding alignment tool | |
| CN215616082U (en) | Welding deformation control tool for thin-wall container | |
| CN216881151U (en) | Correction tool | |
| CN113417762B (en) | Low temperature thin wall storage tank fixed support device | |
| CN218395503U (en) | Top cover on upright post frame of large vertical spinning machine | |
| CN216502470U (en) | Pump base boring tool | |
| CN215401254U (en) | Ski | |
| CN218175602U (en) | Plate girder jacking supporting structure for bridge | |
| CN215857743U (en) | Supporting structure capable of automatically regulating and controlling deformation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200519 |