CN110961857B - Method and system for remanufacturing lip edge groove of sealing weld of control rod driving mechanism - Google Patents

Method and system for remanufacturing lip edge groove of sealing weld of control rod driving mechanism Download PDF

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CN110961857B
CN110961857B CN201911083052.9A CN201911083052A CN110961857B CN 110961857 B CN110961857 B CN 110961857B CN 201911083052 A CN201911083052 A CN 201911083052A CN 110961857 B CN110961857 B CN 110961857B
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sealing weld
lip
groove
sealing
lip edge
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CN110961857A (en
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陈亮
熊志亮
黄腾飞
许国兵
***
赵毛毛
匡艳军
孙广
邱振生
刘刚
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China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
CGN Power Co Ltd
Daya Bay Nuclear Power Operations and Management Co Ltd
Lingdong Nuclear Power Co Ltd
Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
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China General Nuclear Power Corp
China Nuclear Power Engineering Co Ltd
CGN Power Co Ltd
Daya Bay Nuclear Power Operations and Management Co Ltd
Lingdong Nuclear Power Co Ltd
Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00Restoring or reconditioning objects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
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Abstract

The invention discloses a remanufacturing method and a remanufacturing system for a lip groove of a sealing weld of a control rod driving mechanism, which are used for repairing the size over-tolerance of the lip groove of the sealing weld of the control rod driving mechanism, wherein the lip groove of the sealing weld is used for connecting a pipe seat flange and a pressure shell of the control rod driving mechanism, and the method comprises the following steps: judging the size difference between the lip edge groove size of the sealing weld and the design required size; selecting different repairing methods for the lip edge groove of the sealing weld according to the judgment result; and (4) checking and accepting the repaired lip edge groove of the sealing weld. The invention solves the problem of the size over-tolerance of the sealing weld of the control rod driving mechanism in the equipment manufacturing and in-service stage, can realize the remanufacturing and forming of the groove with the over-tolerance size, and has the technical effects of recovering the lip size of the sealing weld to the design requirement.

Description

Method and system for remanufacturing lip edge groove of sealing weld of control rod driving mechanism
Technical Field
The invention relates to the field of nuclear power plants, in particular to a control rod drive mechanism sealing weld lip groove reproducing method and system.
Background
The Control Rod Drive Mechanism (CRDM) is one of the key devices of nuclear reactors of pressurized water reactor nuclear power plants and is an important component of a pressure-bearing boundary of a coolant of a primary circuit of the nuclear power plants. The CRDM is mainly composed of two parts, a mechanical and an electrical system, wherein the pressure-bearing boundary of the mechanical component comprises three omega-shaped weld joints (sealing welds) to ensure the integrity of the CRDM.
In the prior art, aiming at a lower omega weld (Canopy weld), in the CRDM manufacturing and service stage, due to improper operation, the machining process of the CRDM sealing weld lip edge or the cutting of the CRDM sealing weld edge is caused, the lip edge has size out-of-tolerance (does not meet the welding size requirement), the groove size can not be recovered by a mechanical shaping or conventional processing method, and the groove reproduction of the CRDM lower sealing weld edge lip edge is required. The schematic structural diagram of the lower sealing weld groove is shown in fig. 1 and fig. 2. Ca is from the upper end face of a pipe seat flange to the upper end face of a sealing shell lip edge, Da is the external diameter of the lip edge end face of an omega-shaped welding seam, e is the thickness dimension of the lip edge, R is the curvature of the lip edge, aiming at the problem that the dimension of the lip edge of the sealing welding seam at the lower part of the CRDM is out of tolerance, in the stage of a manufacturing factory, the current solution is to scrap the parts with the out of tolerance of the dimension of the sealing welding seam at. The following disadvantages exist: the lip edge size of the sealing weld at the lower part of the CRDM is out of tolerance in the equipment manufacturing and service stages, so that subsequent welding cannot be carried out.
Therefore, it is urgently needed to provide a method and a system for remanufacturing a lip groove of a sealing weld of a control rod driving mechanism, and the technical problem that subsequent welding cannot be performed due to the fact that the lip dimension of the sealing weld at the lower part of a CRDM (cross beam diffusion device) is out of tolerance in the equipment manufacturing and service stages in the prior art is solved.
Disclosure of Invention
The invention provides a method and a system for remanufacturing a lip groove of a sealing weld of a control rod driving mechanism, which aim to solve the technical problem that subsequent welding cannot be carried out due to the fact that the lip edge size of the sealing weld at the lower part of a CRDM (CrDM) is out of tolerance in the equipment manufacturing and service stages in the prior art.
The technical scheme of the invention for solving the technical problems is as follows: the invention provides a remanufacturing method of a lip groove of a sealing weld of a control rod driving mechanism, which is used for repairing the size over-tolerance of the lip groove of the sealing weld of the control rod driving mechanism, and the lip groove of the sealing weld is used for connecting a pipe seat flange and a pressure shell of the control rod driving mechanism, and the method comprises the following steps: judging the size difference between the lip edge groove size of the sealing weld and the design required size; selecting different repairing methods for the lip edge groove of the sealing weld according to the judgment result; and (4) checking and accepting the repaired lip edge groove of the sealing weld.
In the above method for reproducing the lip groove of the sealing weld of the present invention, the repairing method includes: local surfacing repair and overall remanufacturing repair; if the size difference is smaller than the preset maximum difference, performing local surfacing repair on the lip edge groove of the sealing weld; and if the size difference is larger than the preset maximum difference, integrally remanufacturing and repairing the lip edge groove of the sealing weld.
In the remanufacturing method of the lip edge groove of the sealing weld, the local surfacing repair of the lip edge groove of the sealing weld comprises the following steps: judging whether the lip edge groove of the sealing weld is cut or not; if not, carrying out local surfacing welding on the lip edge groove of the sealing weld before cutting, wherein the size after the local surfacing welding needs to meet the requirement of repairing the lip edge groove of the sealing weld, cutting the lip edge groove of the sealing weld after surfacing welding is finished, and shaping the cut lip edge groove of the sealing weld so that the size of the lip edge groove of the sealing weld meets the design requirement; and if the cutting is finished, performing local surfacing on the cut lip edge of the sealing weld, wherein the size of the cut lip edge of the sealing weld needs to meet the requirement of repairing the lip edge of the sealing weld, and shaping the lip edge of the sealing weld after the local surfacing so that the size of the lip edge of the sealing weld meets the design requirement.
In the method for reproducing the lip edge groove of the sealing weld, the integrally reproducing and repairing the lip edge groove of the sealing weld comprises the following steps: performing complete circle processing on the lip edge groove of the sealing weld, and completely removing the lip edge groove of the sealing weld; overlaying a boss on the pipe seat flange, wherein the size of the boss needs to meet the requirement of repairing the lip edge groove of the sealing weld; and integrally shaping the surfacing boss to enable the size of the lip edge groove of the sealing weld to meet the design requirement.
In the method for reproducing the lip edge groove of the sealing weld, the design requirements of the lip edge groove of the sealing weld on the size are as follows: the size from the upper end face of the pipe seat flange to the upper end face of the sealing welding seam lip is 131.45mm-131.55mm, the outer diameter of the end face of the omega welding seam lip is 163.53mm-163.63mm, the thickness of the lip is 1.8mm-2.0mm, and the curvature of the lip is 3.95-4.05;
in the method for reproducing the lip edge groove of the sealing weld seam, when the lip edge groove of the sealing weld seam is subjected to local surfacing before cutting, the upper boundary of the local surfacing is higher than the sealing weld seam, and the lower boundary is lower than the sealing weld seam; the upper boundary of the local build-up welding is in smooth transition with the pressure-resistant shell, and the lower boundary of the local build-up welding is in smooth transition with the pipe seat flange.
In the method for reproducing the lip edge groove of the sealing weld, when the cut lip edge groove of the sealing weld is subjected to local surfacing welding, a sealing weld cutting allowance is reserved on the cut lip edge groove of the sealing weld, the upper boundary of the local surfacing welding is the sealing weld cutting allowance, and the lower boundary is lower than the sealing weld; the lower boundary of the local surfacing is in smooth transition with the pipe seat flange.
In the method for reproducing the lip edge groove of the sealing weld, when the repaired lip edge groove of the sealing weld is received, data of at least four positions of 0 degrees, 90 degrees, 180 degrees and 270 degrees are measured, and the size requirement is ensured to meet the design requirement.
The invention also provides a control rod drive mechanism seal weld lip groove remanufacturing system, which comprises: the size difference value judging module is used for judging the size difference value between the lip edge groove size of the sealing weld and the size required by design; the repairing module is connected with the size difference value judging module and used for selecting different repairing methods for the lip edge groove of the sealing weld seam according to the judging result; and the acceptance module is connected with the repairing module and used for accepting the repaired lip edge groove of the sealing welding seam.
In the lip groove reproducing system for the sealing weld, the repairing module comprises a local surfacing repairing module and an integral reproducing module, and if the size difference is smaller than the preset maximum difference, the local surfacing repairing module is selected to carry out local surfacing repairing on the lip groove of the sealing weld; and if the size difference is larger than the preset maximum difference, selecting an integral remanufacturing module to carry out integral remanufacturing and repairing on the lip edge groove of the sealing weld.
In the above lip groove reproducing system for a sealing weld according to the present invention, the local overlay welding repair module includes: the cutting judgment module is connected with the size difference judgment module and used for judging whether the lip edge groove of the sealing weld is cut or not, and if not, the lip edge groove of the sealing weld enters the first type of local surfacing module; if yes, entering a second type of local surfacing module; the first type of local surfacing module is connected with the cutting judgment module and used for locally surfacing the lip edge groove of the sealing weld seam before cutting, the size after local surfacing needs to meet the requirement of repairing the lip edge groove of the sealing weld seam, the lip edge groove of the sealing weld seam is cut after surfacing is finished, and the cut lip edge of the sealing weld seam is shaped, so that the size of the lip edge groove of the sealing weld seam meets the design requirement; and the second type of local surfacing module is connected with the cutting judgment module and is used for carrying out local surfacing on the cut lip edge of the sealing weld, wherein the size after the local surfacing needs to meet the requirement of repairing the lip edge of the sealing weld, and the lip edge of the sealing weld after the local surfacing is shaped, so that the size of the lip edge of the sealing weld meets the design requirement.
In the lip groove remanufacturing system for a sealing weld according to the present invention, the integral remanufacturing module includes: the sealing weld lip edge removing module is connected with the size difference value judging module and used for carrying out whole-circle processing on the sealing weld and completely removing the sealing weld lip edge groove; the bead welding boss module is connected with the sealing weld lip removing module and used for bead welding a boss on the pipe seat flange, and the size of the boss needs to meet the requirement of repairing a groove of the sealing weld lip; and the shaping processing module is connected with the surfacing boss module and is used for integrally shaping the surfacing boss so that the size of the lip edge groove of the sealing weld meets the design requirement.
In the lip groove reproducing system for the sealing weld, the design requirements of the lip groove size of the sealing weld are as follows: the size from the upper end face of the pipe seat flange to the upper end face of the sealing welding seam lip is 131.45mm-131.55mm, the outer diameter of the end face of the omega welding seam lip is 163.53mm-163.63mm, the thickness of the lip is 1.8mm-2.0mm, and the curvature of the lip is 3.95-4.05.
In the lip edge groove reproducing system for the sealing weld seam, when the lip edge groove of the sealing weld seam is subjected to local surfacing before cutting in the first type of local surfacing module, the upper boundary of the local surfacing is higher than the sealing weld seam, and the lower boundary is lower than the sealing weld seam; the upper boundary of the local build-up welding is in smooth transition with the pressure-resistant shell, and the lower boundary of the local build-up welding is in smooth transition with the pipe seat flange.
In the above reproduction system for the lip edge groove of the sealing weld, in the second type of local surfacing module, when the lip edge groove of the sealing weld after cutting is subjected to local surfacing, a sealing weld cutting allowance is left in the lip edge groove of the sealing weld after cutting, the upper boundary of the local surfacing is the sealing weld cutting allowance, and the lower boundary is lower than the sealing weld; the lower boundary of the local surfacing is in smooth transition with the pipe seat flange.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: the invention provides a method and a system for remanufacturing a lip edge groove of a sealing weld of a control rod driving mechanism, aiming at the technical problem that subsequent welding cannot be carried out due to the fact that the lip edge dimension of the sealing weld at the lower part of a CRDM (CrDM) is out of tolerance in the equipment manufacturing and service stages in the prior art.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a prior art control rod drive mechanism seal weld lip groove configuration;
FIG. 2 is an enlarged partial view of a prior art control rod drive mechanism seal weld lip groove;
FIG. 3 is a flowchart of a remanufacturing method for a lip groove of a sealing weld of a control rod drive mechanism according to an embodiment of the present invention;
FIG. 4 is a flowchart of a step S3 according to a first embodiment of the present invention;
FIG. 5 is a schematic view of a weld overlay prior to cutting a seal weld according to an embodiment of the present invention;
FIG. 6 is a schematic cutting view of a weld overlay prior to cutting of a seal weld according to an embodiment of the present invention;
FIG. 7 is a schematic illustration of the repair results of the weld overlay prior to cutting of the seal weld according to one embodiment of the present invention;
FIG. 8 is a schematic diagram of a sealing weld joint provided in accordance with an embodiment of the present invention after being cut and before being built up;
FIG. 9 is a schematic view of a weld overlay after cutting a seal weld according to an embodiment of the present invention;
FIG. 10 is a schematic illustration of a repair result of a weld overlay after cutting a seal weld according to an embodiment of the present invention;
FIG. 11 is a flowchart of step S4 provided by an embodiment of the present invention;
FIG. 12 is a schematic view of a seal bead lip removal for an integral remanufacturing of a seal bead provided in accordance with an embodiment of the present invention;
fig. 13 is a schematic diagram of a weld joint repair bead projection after the weld joint is integrally remanufactured according to the first embodiment of the present invention;
FIG. 14 is a functional block diagram of a control rod drive mechanism seal weld lip groove remanufacturing system according to an embodiment of the present disclosure;
FIG. 15 is a schematic view of a repair module of a control rod drive mechanism seal weld lip groove remanufacturing system according to an embodiment of the present disclosure;
FIG. 16 is a schematic view of a local weld overlay repair module of a control rod drive mechanism seal weld lip groove remanufacturing system according to an embodiment of the present invention;
FIG. 17 is a schematic view of an overall remanufacturing module of a control rod drive mechanism seal weld lip groove remanufacturing system according to an embodiment of the present invention.
Detailed Description
In order to solve the technical problem that subsequent welding cannot be performed due to the fact that the size of the lip edge of the sealing weld at the lower part of the CRDM (CrDM) is out of tolerance in the equipment manufacturing and service stages in the prior art, the invention aims to provide a method and a system for remanufacturing the lip edge of the sealing weld of a control rod driving mechanism, and the method and the system have the core idea that: the size and the size difference of the sealing weld are judged, different repairing modes are selected, the remanufacturing and forming of the control rod driving mechanism sealing weld size out-of-tolerance groove in the equipment manufacturing and service stage can be completed, the size of the lip edge of the sealing weld is recovered to the design requirement, and the technical effect of improving the repairing efficiency while the repairing process is simplified is achieved through the different repairing modes.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example one
The embodiment of the invention provides a remanufacturing method of a lip groove of a sealing weld of a control rod driving mechanism, which is used for repairing the size over-tolerance of the lip groove of the sealing weld of the control rod driving mechanism, wherein the lip groove of the sealing weld is used for connecting a pipe seat flange and a pressure shell of the control rod driving mechanism, and the reason that the size of the lip groove of the sealing weld does not meet the design requirement is as follows: the sealing weld may shrink, resulting in the sealing weld lip bevel size not meeting the design requirements.
As shown in fig. 3, the remanufacturing method of the control rod drive mechanism seal weld lip groove comprises the following steps:
step S1, judging the size difference between the lip groove size of the sealing weld and the size required by design;
s2, selecting different repairing methods for the lip edge groove of the sealing weld according to the judgment result;
and step S3, checking and accepting the repaired lip edge groove of the sealing weld. The reason is that when the size difference between the lip groove of the sealing weld and the size required by design is different, different repairing methods are required to be adopted for repairing. And the dimension of the lip edge groove of the sealing weld can be ensured to meet the requirement through acceptance.
It should be noted that, when the repair is accepted, the lip edge groove size of the sealing weld should meet the requirements that the size Ca from the upper end face of the pipe seat flange to the upper end face of the sealing weld lip is 131.45mm-131.55mm, the external diameter Da of the lip edge end face of the omega weld is 163.53mm-163.63mm, the thickness e of the lip edge is 1.8mm-2.0mm, and the curvature R of the lip edge is 3.95-4.05. In addition, during acceptance, the dimensional data of at least four positions of 0 degree, 90 degrees, 180 degrees and 270 degrees of the lip edge of the sealing weld are required to be measured, and the dimensional requirements are required to be met.
Further to be noted are: the lip curvature R is only used as a reference, and is not limited to 3.95-4.05 when the dimensions Ca from the upper end surface of the pipe seat flange to the upper end surface of the sealing welding seam lip, the external diameter Da of the omega welding seam lip end surface and the lip thickness e meet the requirements.
The repairing method comprises the following steps: local surfacing repair and overall remanufacturing repair; if the size difference is smaller than the preset maximum difference, performing local surfacing repair on the lip edge groove of the sealing weld; and if the size difference is larger than the preset maximum difference, integrally remanufacturing and repairing the lip edge groove of the sealing weld. The reason is that when the size difference is too large, the local surfacing repair cannot meet the repair size requirement, so that the size difference between the lip groove size of the sealing weld and the design required size is judged in advance, a proper lip groove repair method of the sealing weld is convenient to select, and the repair efficiency is improved.
Further, as shown in fig. 4, the performing of the local bead weld repair on the lip groove of the sealing bead in step S2 includes:
step S21, judging whether the lip edge groove of the sealing weld is cut;
step S22, if not, performing local surfacing welding on the lip edge groove of the sealing weld before cutting, wherein the size after the local surfacing welding needs to meet the requirement of repairing the lip edge groove of the sealing weld, cutting the lip edge groove of the sealing weld after finishing surfacing welding, and shaping the lip edge groove of the sealing weld after cutting to ensure that the size of the lip edge groove of the sealing weld meets the design requirement; shaping the cut lip edge groove of the sealing weld seam can be in a machining mode;
and step S23, if the cutting is finished, performing local surfacing on the cut lip edge of the sealing weld, wherein the size of the cut lip edge of the sealing weld needs to meet the requirement of repairing the lip edge of the sealing weld, and shaping the lip edge of the sealing weld after the local surfacing so that the size of the lip edge of the sealing weld meets the design requirement. The shaping of the lip edge groove of the sealing weld seam after the partial overlaying can be in a machining mode.
It should be noted that step S22 and step S23 are not in sequence, and are only related to the control rod drive mechanism seal weld lip groove repair process flow, if the size is found to be not satisfactory before cutting, step S22 is executed, and if the size is found to be not satisfactory after cutting, step S23 is executed; in addition, after the step S22 is executed, if the size is not satisfactory due to other external factors after cutting, the step S23 may be executed subsequently to repair the lip groove of the sealing weld.
Specifically, as shown in fig. 5, when the lip edge groove of the sealing weld is subjected to local bead welding, the upper boundary of the lip edge groove of the local bead welding is higher than the sealing weld, and the lower boundary is lower than the sealing weld; the upper boundary of the local overlaying is in smooth transition with the pressure-resistant shell, and the lower boundary is in smooth transition with the pipe seat flange; by arranging the upper boundary of the local overlaying to be higher than the sealing weld and the lower boundary to be lower than the sealing weld, the overlaying layer can be used for repairing the lip edge groove of the sealing weld after the overlaying is finished, so that the failure of the overlaying layer is avoided; the smooth transition of the upper boundary of the local overlaying and the pressure-resistant shell and the smooth transition of the lower boundary of the local overlaying and the pipe seat flange can avoid the problem of stress concentration and improve the reliability of the lip edge groove of the sealing weld of the control rod driving mechanism.
Further, as shown in fig. 6, after the surfacing is completed, the lip edge of the sealing weld is cut, the upper half of the partial surfacing is cut off, only the lower half is left, and the partial surfacing is flush with the upper end surface of the original weld; and then shaping the cut lip edge groove of the sealing weld to enable the size of the lip edge groove of the sealing weld to meet the design requirement, wherein the thickness e is 1.8-2.0 mm, the curvature R of the lip edge is 3.95-4.05, and the shape of the lip edge groove of the sealing weld is a semicircle with an upward opening, as shown in fig. 7.
Further, as shown in fig. 8, for the lip edge groove of the sealing weld before repair after cutting of the sealing weld, in the cutting process, a part of size allowance is left at the end part of the lip edge of the sealing weld, a cutting edge needs to deviate from a side pipe seat flange of the reactor pressure vessel, and the size allowance is left at the upper end part of the sealing weld.
Further, as shown in fig. 9, when the lip edge groove of the sealing weld after cutting is subjected to local surfacing, the lower boundary of the local surfacing and the pipe seat flange are in smooth transition; a sealing weld cutting allowance is reserved on the cut sealing weld lip edge groove; the upper boundary of the local surfacing is the cutting allowance of the sealing weld, and the lower boundary is lower than the sealing weld. By arranging the lower boundary lower than the sealing weld, the surfacing layer can be used for repairing the lip edge groove of the sealing weld after surfacing is finished, so that the failure of the surfacing layer is avoided; the smooth transition between the lower boundary and the pipe seat flange can avoid the problem of stress concentration and improve the reliability of the control rod driving mechanism sealing weld lip edge groove. As shown in fig. 10, the repaired lip edge groove of the sealing weld has the thickness e of 1.8mm-2.0mm, the lip curvature R of 3.95-4.05, and the shape of the lip edge groove of the sealing weld is a semicircle with an upward opening.
Further, as shown in fig. 11, step S3 includes:
step S31, performing complete circle processing on the lip edge groove of the sealing weld, and completely removing the lip edge groove of the sealing weld;
s32, overlaying a boss on the pipe seat flange, wherein the size of the boss needs to meet the requirement of repairing the lip edge groove of the sealing weld;
and S33, integrally shaping the surfacing boss to enable the size of the lip edge groove of the sealing weld to meet the design requirement. The mode of integrally shaping the surfacing lug boss can be a machining mode.
As shown in fig. 12, the sealing weld lip edge groove is subjected to complete circle processing, the sealing weld lip edge groove is completely removed, and then only the pipe seat flange is left, as shown in fig. 13, the boss is welded on the pipe seat flange, and the size of the boss needs to meet the requirement of repairing the sealing weld lip edge groove, so that the machining allowance is provided for subsequent integral shaping, and the design requirement can be guaranteed to be machined.
In addition, it should be noted that if the lip edge groove of the sealing weld is not cut, the size of the lip edge groove of the sealing weld meets the design requirements after the repair, but in the actual use process, the size of the lip edge groove of the sealing weld can not meet the size design requirements due to external damage, and the lip edge groove can still be repaired again through the repair method after cutting and the integral reproduction to meet the requirements; similarly, if the lip edge groove of the sealing weld repaired after cutting does not meet the size requirement after being damaged by the outside in the subsequent use process, the lip edge groove of the sealing weld can also be repaired again through integral remanufacturing so as to meet the requirement.
Example two
The invention also provides a control rod drive mechanism seal weld lip groove remanufacturing system, which is suitable for the control rod drive mechanism seal weld lip groove remanufacturing method in the first embodiment, as shown in fig. 14, the method comprises the following steps:
the size difference value judging module 100 is used for judging the size difference value between the lip edge groove size of the sealing weld and the size required by design;
the repairing module 200 is connected with the size difference value judging module 100 and used for selecting different repairing methods for the lip edge groove of the sealing weld seam according to the judging result;
and the acceptance module 300 is connected with the repair module and used for accepting the repaired lip edge groove of the sealing weld.
When the repair is tested, the size of the lip edge groove of the sealing welding seam is required to meet the requirements that the size Ca from the upper end face of a pipe seat flange to the upper end face of the lip edge of the sealing welding seam is 131.45-131.55 mm, the outer diameter Da of the end face of the lip edge of the omega welding seam is 163.53-163.63 mm, the thickness e of the lip edge is 1.8-2.0 mm, and the curvature R of the lip edge is 3.95-4.05. It should be noted that: the lip curvature R is only used as a reference, and is not limited to 3.95-4.05 when the dimensions Ca from the upper end surface of the pipe seat flange to the upper end surface of the sealing welding seam lip, the external diameter Da of the omega welding seam lip end surface and the lip thickness e meet the requirements.
Further, as shown in fig. 15, the repair module 200 includes a local bead weld repair module 210 and an overall remanufacturing module 220, and if the size difference is smaller than a preset maximum difference, the local bead weld repair module 210 is selected to perform local bead weld repair on the lip edge of the sealing bead; and if the size difference is larger than the preset maximum difference, selecting the integral remanufacturing module 220 to carry out integral remanufacturing and repairing on the lip edge groove of the sealing weld. This is because, when the size difference between the lip edge groove size of the sealing weld and the design requirement size is larger than the preset maximum size difference, the lip edge groove size of the sealing weld cannot be repaired to the design requirement by a local surfacing repair method. According to the invention, the size difference between the size of the lip groove of the sealing weld and the size required by design is judged, so that a proper repairing method of the lip groove of the sealing weld is convenient to select, and the repairing efficiency is improved.
Further, as shown in fig. 16, the partial overlay welding repair module 210 includes:
the cutting judgment module 211 is connected with the size difference judgment module 100 and used for judging whether the lip edge groove of the sealing weld is cut or not, and if not, the lip edge groove enters the first-type local surfacing module 212; if yes, entering a second type local overlaying module 213;
the first-class local surfacing module 212 is connected with the cutting judgment module 211 and is used for carrying out local surfacing on the lip edge groove of the sealing weld before cutting, wherein the size after the local surfacing needs to meet the requirement of repairing the lip edge groove of the sealing weld; when the lip edge groove of the sealing weld joint is subjected to local surfacing, the upper boundary of the lip edge groove of the local surfacing is higher than the sealing weld joint, and the lower boundary is lower than the sealing weld joint; the upper boundary of the local overlaying is in smooth transition with the pressure-resistant shell, and the lower boundary is in smooth transition with the pipe seat flange; by arranging the upper boundary of the local overlaying to be higher than the sealing weld and the lower boundary to be lower than the sealing weld, the overlaying layer can be used for repairing the lip edge groove of the sealing weld after the overlaying is finished, so that the failure of the overlaying layer is avoided; the smooth transition of the upper boundary of the local overlaying and the pressure-resistant shell and the smooth transition of the lower boundary of the local overlaying and the pipe seat flange can avoid the problem of stress concentration and improve the reliability of the lip edge groove of the sealing weld of the control rod driving mechanism.
The second type of local surfacing module 213 is connected to the cutting judgment module 211, and is configured to perform local surfacing on the cut lip edge of the sealing weld, where the size after the local surfacing needs to meet the requirement of repairing the lip edge of the sealing weld, and shape the lip edge of the sealing weld after the local surfacing, so that the size of the lip edge of the sealing weld meets the design requirement. Aiming at a lip edge bevel of a sealing weld before repairing after cutting the sealing weld, in the cutting process, a part of size allowance is reserved at the end part of the lip edge of the sealing weld, a cutting edge needs to deviate from a side pipe seat flange of a reactor pressure vessel, and the size allowance is reserved at the upper end part of the sealing weld; further, when the cut lip edge groove of the sealing weld joint is subjected to local surfacing, the lower boundary of the local surfacing and the pipe seat flange are in smooth transition; a sealing weld cutting allowance is reserved on the cut sealing weld lip edge groove; the upper boundary of the local surfacing is the cutting allowance of the sealing weld, and the lower boundary is lower than the sealing weld. By arranging the lower boundary lower than the sealing weld, the surfacing layer can be used for repairing the lip edge groove of the sealing weld after surfacing is finished, so that the failure of the surfacing layer is avoided; the smooth transition between the lower boundary and the pipe seat flange can avoid the problem of stress concentration and improve the reliability of the control rod driving mechanism sealing weld lip edge groove.
Further, as shown in fig. 17, the integral remanufacturing module 220 comprises:
the sealing weld lip edge removing module 221 is connected with the size difference value judging module 100 and is used for carrying out whole-circle processing on the sealing weld and completely removing the sealing weld lip edge groove;
the bead weld boss module 222 is connected with the sealing weld lip removing module 221 and used for bead welding a boss on the pipe seat flange, and the size of the boss needs to meet the requirement of repairing a lip groove of the sealing weld lip;
and the shaping and processing module 223 is connected with the surfacing boss module 222 and is used for integrally shaping the surfacing boss so that the size of the lip edge groove of the sealing weld meets the design requirement. The machining allowance is provided for subsequent integral shaping, and the machining requirement can be guaranteed.
It should be noted that: the design requirements of the lip edge groove size of the sealing weld seam are as follows: the size from the upper end face of the pipe seat flange to the upper end face of the sealing welding seam lip is 131.45mm-131.55mm, the outer diameter of the end face of the omega welding seam lip is 163.53mm-163.63mm, the thickness of the lip is 1.8mm-2.0mm, and the curvature of the lip is 3.95-4.05; and the required size for repairing the lip edge of the sealing weld is larger than the design requirement for the size of the groove of the lip edge of the sealing weld. In addition, during acceptance, the dimensional data of at least four positions of 0 degree, 90 degrees, 180 degrees and 270 degrees of the lip edge of the sealing weld are required to be measured, and the dimensional requirements are required to be met.
In addition, it should be noted that if the lip edge groove of the sealing weld is not cut, the size of the lip edge groove of the sealing weld meets the design requirements after the repair, but in the actual use process, the size of the lip edge groove of the sealing weld can not meet the size design requirements due to external damage, and the lip edge groove can still be repaired again through the repair method after cutting and the integral reproduction to meet the requirements; similarly, if the lip edge groove of the sealing weld repaired after cutting does not meet the size requirement after being damaged by the outside in the subsequent use process, the lip edge groove of the sealing weld can also be repaired again through integral remanufacturing so as to meet the requirement.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In summary, the invention provides a method and a system for remanufacturing a lip edge groove of a sealing weld of a control rod driving mechanism, which can complete remanufacturing and forming of the lip edge groove of the sealing weld of the control rod driving mechanism in the equipment manufacturing and service stages by judging the size and the size difference of the sealing weld and selecting different repairing modes, recover the size of the lip edge of the sealing weld to the design requirement, and improve the technical effect of repairing efficiency while simplifying the repairing process by different repairing modes.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (13)

1. The utility model provides a control rod drive mechanism sealing weld lip groove refabrication system which characterized in that includes:
the size difference value judging module is used for judging the size difference value between the lip edge groove size of the sealing weld and the size required by design;
the repairing module is connected with the size difference value judging module and used for selecting different repairing methods for the lip edge groove of the sealing weld seam according to the judging result;
the acceptance module is connected with the repairing module and is used for accepting the repaired lip edge groove of the sealing welding seam;
the repairing module comprises a local surfacing repairing module and an integral remanufacturing module, and if the size difference is smaller than a preset maximum difference, the local surfacing repairing module is selected to carry out local surfacing repairing on the lip edge groove of the sealing weld; if the size difference is larger than the preset maximum difference, selecting an integral remanufacturing module to carry out integral remanufacturing and repairing on the lip edge groove of the sealing weld;
the partial surfacing repair module comprises:
the cutting judgment module is connected with the size difference judgment module and used for judging whether the lip edge groove of the sealing weld is cut or not, and if not, the lip edge groove of the sealing weld enters the first type of local surfacing module; if yes, entering a second type of local surfacing module;
the first type of local surfacing module is connected with the cutting judgment module and used for locally surfacing the lip edge groove of the sealing weld seam before cutting, the size after local surfacing needs to meet the requirement of repairing the lip edge groove of the sealing weld seam, the lip edge groove of the sealing weld seam is cut after surfacing is finished, and the cut lip edge of the sealing weld seam is shaped, so that the size of the lip edge groove of the sealing weld seam meets the design requirement;
and the second type of local surfacing module is connected with the cutting judgment module and is used for carrying out local surfacing on the cut lip edge of the sealing weld, wherein the size after the local surfacing needs to meet the requirement of repairing the lip edge of the sealing weld, and the lip edge of the sealing weld after the local surfacing is shaped, so that the size of the lip edge of the sealing weld meets the design requirement.
2. The sealing bead lip groove remanufacturing system of claim 1, wherein the integral remanufacturing module comprises:
the sealing weld lip edge removing module is connected with the size difference value judging module and used for carrying out whole-circle processing on the sealing weld and completely removing the sealing weld lip edge groove;
the bead welding boss module is connected with the sealing weld lip removing module and used for bead welding a boss on the pipe seat flange, and the size of the boss needs to meet the requirement of repairing a groove of the sealing weld lip;
and the shaping processing module is connected with the surfacing boss module and is used for integrally shaping the surfacing boss so that the size of the lip edge groove of the sealing weld meets the design requirement.
3. The sealing bead lip groove remanufacturing system of claim 2, wherein the sealing bead lip groove size design requirement is: the size from the upper end face of the pipe seat flange to the upper end face of the sealing welding seam lip is 131.45mm-131.55mm, the outer diameter of the end face of the omega welding seam lip is 163.53mm-163.63mm, the thickness of the lip is 1.8mm-2.0mm, and the curvature of the lip is 3.95-4.05.
4. The lip groove reproduction system of a sealing weld according to claim 3, wherein in the first-type local surfacing module, when local surfacing is performed on the lip groove of the sealing weld before cutting, the upper boundary of the local surfacing is higher than the sealing weld, and the lower boundary is lower than the sealing weld; the upper boundary of the local build-up welding is in smooth transition with the pressure-resistant shell, and the lower boundary of the local build-up welding is in smooth transition with the pipe seat flange.
5. The lip edge groove reproducing system for the sealing weld according to claim 4, wherein in the second type of local surfacing module, when local surfacing is performed on the cut lip edge groove of the sealing weld, a sealing weld cutting allowance is left on the cut lip edge groove of the sealing weld, an upper boundary of the local surfacing is the sealing weld cutting allowance, and a lower boundary is lower than the sealing weld; the lower boundary of the local surfacing is in smooth transition with the pipe seat flange.
6. A control rod drive mechanism seal weld lip groove reproducing method is applied to the system of claim 1 and used for repairing the size over-tolerance of the control rod drive mechanism seal weld lip groove, and the seal weld lip groove is used for connecting a pipe seat flange and a pressure shell of a control rod drive mechanism, and is characterized by comprising the following steps:
judging the size difference between the lip edge groove size of the sealing weld and the design required size;
selecting different repairing methods for the lip edge groove of the sealing weld according to the judgment result;
and (4) checking and accepting the repaired lip edge groove of the sealing weld.
7. The method of claim 6, wherein the repair method comprises: local surfacing repair and overall remanufacturing repair; if the size difference is smaller than the preset maximum difference, performing local surfacing repair on the lip edge groove of the sealing weld; and if the size difference is larger than the preset maximum difference, integrally remanufacturing and repairing the lip edge groove of the sealing weld.
8. The method for remanufacturing a lip groove of a sealing bead according to claim 7, wherein the locally bead welding repairing the lip groove of the sealing bead comprises:
judging whether the lip edge groove of the sealing weld is cut or not;
if not, carrying out local surfacing welding on the lip edge groove of the sealing weld before cutting, wherein the size after the local surfacing welding needs to meet the requirement of repairing the lip edge groove of the sealing weld, cutting the lip edge groove of the sealing weld after surfacing welding is finished, and shaping the cut lip edge groove of the sealing weld so that the size of the lip edge groove of the sealing weld meets the design requirement;
and if the cutting is finished, performing local surfacing on the cut lip edge of the sealing weld, wherein the size of the cut lip edge of the sealing weld needs to meet the requirement of repairing the lip edge of the sealing weld, and shaping the lip edge of the sealing weld after the local surfacing so that the size of the lip edge of the sealing weld meets the design requirement.
9. The method for remanufacturing a lip groove of a sealing bead according to claim 8, wherein the integrally remanufacturing and repairing the lip groove of the sealing bead comprises:
performing complete circle processing on the lip edge groove of the sealing weld, and completely removing the lip edge groove of the sealing weld;
overlaying a boss on the pipe seat flange, wherein the size of the boss needs to meet the requirement of repairing the lip edge groove of the sealing weld;
and integrally shaping the surfacing boss to enable the size of the lip edge groove of the sealing weld to meet the design requirement.
10. The method for remanufacturing a lip groove of a sealing weld according to claim 9, wherein the lip groove of the sealing weld is dimensioned as follows: the size from the upper end face of the pipe seat flange to the upper end face of the sealing welding seam lip is 131.45mm-131.55mm, the outer diameter of the end face of the omega welding seam lip is 163.53mm-163.63mm, the thickness of the lip is 1.8mm-2.0mm, and the curvature of the lip is 3.95-4.05.
11. The lip groove reproduction method of the sealing weld according to claim 10, wherein when the lip groove of the sealing weld is subjected to local surfacing before cutting, an upper boundary of the local surfacing is higher than the sealing weld, and a lower boundary is lower than the sealing weld; the upper boundary of the local build-up welding is in smooth transition with the pressure-resistant shell, and the lower boundary of the local build-up welding is in smooth transition with the pipe seat flange.
12. The lip groove reproduction method of the sealing weld according to claim 11, wherein when the lip groove of the sealing weld after cutting is subjected to local surfacing, a sealing weld cutting allowance is left in the lip groove of the sealing weld after cutting, an upper boundary of the local surfacing is the sealing weld cutting allowance, and a lower boundary is lower than the sealing weld; the lower boundary of the local surfacing is in smooth transition with the pipe seat flange.
13. The lip groove reproduction method of the sealing weld according to claim 12, wherein when the repaired lip groove of the sealing weld is received, data of at least four positions of 0 °, 90 °, 180 ° and 270 ° are measured, and it is ensured that the size requirement meets the design requirement.
CN201911083052.9A 2019-11-07 2019-11-07 Method and system for remanufacturing lip edge groove of sealing weld of control rod driving mechanism Active CN110961857B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5348212A (en) * 1992-10-06 1994-09-20 Commonwelth Edison Welding method for rotatable shafts
JP2002361523A (en) * 2001-06-11 2002-12-18 Mitsubishi Heavy Ind Ltd Method for repairing plate-like body having flow passage inside thereof
CN101536011A (en) * 2005-01-21 2009-09-16 光子动力学公司 Automatic defect repair system
CN101691010A (en) * 2009-09-28 2010-04-07 中国矿业大学 Multifunctional numerical control equipment
CN104759797A (en) * 2015-04-14 2015-07-08 攀钢集团工程技术有限公司 Combined groove for thick workpiece crack repairing and combined groove repairing technology
CN108637586A (en) * 2018-05-14 2018-10-12 合肥东方节能科技股份有限公司 A kind of guide and guard surface repairing method
CN109909585A (en) * 2019-03-12 2019-06-21 中广核工程有限公司 A kind of build-up welding repair method and system for the maintenance of stainless steel branch pipe weld seam

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5348212A (en) * 1992-10-06 1994-09-20 Commonwelth Edison Welding method for rotatable shafts
JP2002361523A (en) * 2001-06-11 2002-12-18 Mitsubishi Heavy Ind Ltd Method for repairing plate-like body having flow passage inside thereof
CN101536011A (en) * 2005-01-21 2009-09-16 光子动力学公司 Automatic defect repair system
CN101691010A (en) * 2009-09-28 2010-04-07 中国矿业大学 Multifunctional numerical control equipment
CN104759797A (en) * 2015-04-14 2015-07-08 攀钢集团工程技术有限公司 Combined groove for thick workpiece crack repairing and combined groove repairing technology
CN108637586A (en) * 2018-05-14 2018-10-12 合肥东方节能科技股份有限公司 A kind of guide and guard surface repairing method
CN109909585A (en) * 2019-03-12 2019-06-21 中广核工程有限公司 A kind of build-up welding repair method and system for the maintenance of stainless steel branch pipe weld seam

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
船舶柴油机轴承巴氏合金堆焊技术的研究及应用;卢忠华;《金属加工(热加工)》;20171231;第40-43页 *

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