CN113793708B - Positioning adjustment device and positioning adjustment method for nuclear power station lower part in-pile components - Google Patents
Positioning adjustment device and positioning adjustment method for nuclear power station lower part in-pile components Download PDFInfo
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- CN113793708B CN113793708B CN202110657160.3A CN202110657160A CN113793708B CN 113793708 B CN113793708 B CN 113793708B CN 202110657160 A CN202110657160 A CN 202110657160A CN 113793708 B CN113793708 B CN 113793708B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/19—Reactor parts specifically adapted to facilitate handling, e.g. to facilitate charging or discharging of fuel elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a positioning adjustment device and a positioning adjustment method for a lower part of a nuclear power station, which relate to the technical field of nuclear power station construction in the technical field, and comprise a pressure vessel, a pressure vessel flange, a hanging basket flange and a plurality of adjustment tools, wherein the adjustment tools are distributed on the upper surface of the hanging basket flange in phases of 0 DEG, 90 DEG, 180 DEG and 270 DEG clockwise; the adjusting tool comprises a fixing mechanism and an adjusting mechanism, wherein the fixing mechanism is arranged on a hanging basket flange, the adjusting mechanism is arranged on a pressure vessel flange, the adjusting mechanism comprises a polytetrafluoroethylene rod and adjusting jackscrews arranged on two sides of the polytetrafluoroethylene rod, the adjusting jackscrews are used for adjusting the positions of the polytetrafluoroethylene rod, the upper end of the polytetrafluoroethylene rod is provided with a connecting mechanism, and the polytetrafluoroethylene rod is rotationally connected with the fixing mechanism through the connecting mechanism. The lower part in-pile component adjustment standard operation is realized, the tool manufacturing cost is saved, the installation efficiency is improved, and the equipment damage risk is reduced.
Description
Technical Field
The invention relates to the technical field of nuclear power station construction, in particular to a device and a method for adjusting the position of a lower part of a nuclear power station in-situ.
Background
The prior position adjustment process for the lower internal pile component after being hung into the pressure vessel mainly comprises two modes:
(1) The lower internal pile component is adjusted by manpower by using traditional tools such as a crow bar and the like under the hoisting critical state (namely about 95-99% by weight of the ring hoisting equipment), the accurate adjustment cannot be realized in the mode, the problems of excessive adjustment, repeated adjustment and the like are easy to occur, and in addition, the quality problems such as equipment body damage and the like are easy to cause if the operation is improper.
(2) The lower in-pile components are regulated by using special tools provided by in-pile component manufacturers under the hoisting critical state (namely about 95-99% by weight of ring hoisting equipment), the special tools can only be matched with in-pile components corresponding to the nuclear power pile types, different pile types cannot be used universally, and only part of in-pile components of the nuclear power pile types are provided with special tools currently. The special tool has complex structure and high manufacturing precision, and can not be designed and imitated by reference on site.
Disclosure of Invention
The invention aims to provide a device and a method for adjusting the position of a lower reactor internal component of a nuclear power station, which are used for solving the technical problems.
The technical scheme adopted by the invention is as follows:
the device comprises a pressure vessel, a pressure vessel flange arranged on the upper surface of the pressure vessel, a hanging basket flange arranged on the upper surface of the pressure vessel, and a plurality of adjusting tools fixed on the hanging basket flange, wherein the four adjusting tools are arranged and are distributed on the upper surface of the hanging basket flange in a clockwise phase of 0 degree, 90 degrees, 180 degrees and 270 degrees;
each adjusting tool comprises a fixing mechanism and an adjusting mechanism, wherein the fixing mechanism is arranged on the hanging basket flange, the adjusting mechanism is arranged on the pressure vessel flange, the adjusting mechanism comprises a polytetrafluoroethylene rod and adjusting jackscrews arranged on two sides of the polytetrafluoroethylene rod, the adjusting jackscrews are used for adjusting the positions of the polytetrafluoroethylene rod, a connecting mechanism is arranged at the upper end of the polytetrafluoroethylene rod, and the polytetrafluoroethylene rod is connected with the fixing mechanism in a rotating mode through the connecting mechanism.
Preferably, the hanging basket flange is annular, the upper surface of the hanging basket flange is a hanging basket supporting surface, a plurality of main bolt holes are uniformly formed in the hanging basket supporting surface, the included angle between every two adjacent main bolt holes is 60 degrees, and the fixing mechanism is arranged in every two adjacent main bolt holes.
As a further preferable mode, the fixing mechanism comprises equal angle steel with an included angle of 60 degrees and reducing bolts arranged on two free ends of the equal angle steel, two reducing bolts are positioned in two adjacent main bolt holes, and an included angle part of the equal angle steel is connected with the connecting mechanism.
As a further preferred aspect, the connecting mechanism includes a first hexagonal bolt and a long screw, the first hexagonal bolt is in threaded connection with the long screw, the long screw passes through the included angle portion and is connected with the upper end of the polytetrafluoroethylene rod, and the first hexagonal bolt is used for fixing the included angle portion on the long screw.
As a further preferable mode, the connecting mechanism further comprises a flat washer and a compression nut, the long screw is further provided with the compression nut and the flat washer, the compression nut is located at the lower side of the included angle part, and the flat washer is located between the compression nut and the polytetrafluoroethylene rod.
Preferably, a groove is formed between the inner peripheral wall of the basket flange and the upper surface of the pressure vessel flange, a centering pin hole is formed in the bottom wall of the groove, the polytetrafluoroethylene rod is arranged in the centering pin hole, and a gap of at least 5mm is formed between the outer peripheral wall of the polytetrafluoroethylene rod and the inner peripheral wall of the centering pin hole.
As a further preferred aspect, the adjusting mechanism further comprises a second hexagonal bolt and an angle steel, one end of the adjusting jackscrew penetrates through the angle steel and is rotationally connected with the polytetrafluoroethylene rod, and the second hexagonal bolt is arranged on the angle steel and is used for fixing the angle steel on the bottom wall of the groove.
As a further preferable mode, the self-tapping device further comprises a base plate and a self-tapping screw, wherein the base plate is arranged on the polytetrafluoroethylene rod, the self-tapping screw is used for fixing the base plate on the polytetrafluoroethylene rod, and one end of the adjusting jackscrew is rotatably connected with the base plate.
As a further preferable mode, the pressure vessel further comprises a dial indicator, wherein the dial indicator is arranged on the bottom wall of the groove, and a measuring rod of the dial indicator is abutted against a lower internal pile component in the pressure vessel.
A method of in-situ adjustment of a lower internals of a nuclear power plant, the in-situ adjustment method comprising:
s1, hanging a lower internal pile component into the pressure vessel through ring hanging equipment, and hanging 95% -99% of the weight of the lower internal pile component through the ring hanging equipment so that the lower internal pile component reaches a hanging critical state;
s2, determining an adjusting mode and an adjusting amount of the whole tool according to a first inspection result after the lower internal pile member is lifted into the pressure container;
the adjusting modes comprise a horizontal adjusting mode and a circumferential adjusting mode;
the horizontal adjustment mode is as follows: loosening the adjusting jackscrews in the adjusting tools at the positions of 90 degrees and 270 degrees, loosening the adjusting jackscrews close to the side of 90 degrees in the adjusting tools at the positions of 0 degrees and 180 degrees, and loosening and tightening the corresponding adjusting jackscrews in the same way to other angular translations by tightening the adjusting jackscrews close to the side of 270 degrees in the adjusting tools at the positions of 0 degrees and 180 degrees;
the circumferential adjustment mode is as follows: loosening the adjusting jackscrews positioned at one side of 0 DEG, 90 DEG, 180 DEG and 270 DEG, and then tightening the adjusting jackscrews positioned at the other side of 0 DEG, 90 DEG, 180 DEG and 270 DEG to realize the rotation of the lower internals.
The technical scheme has the following advantages or beneficial effects:
according to the invention, the lower in-pile component in-place adjustment performed by the adjusting tool can be used for realizing the rapid and accurate adjustment of the lower in-pile component after the first in-pile operation, so that the problem that the traditional adjusting process is rough and seamless is effectively solved, the standard adjustment operation of the lower in-pile component is realized, the tool manufacturing cost is saved, the installation efficiency is improved, and the equipment damage risk is reduced.
Drawings
FIG. 1 is a schematic view of a lower internals in-situ adjustment apparatus for a nuclear power plant according to the present invention;
fig. 2 is a schematic installation view of the nuclear power plant lower internals positioning apparatus according to the present invention.
In the figure: 1. a pressure vessel; 2. a basket flange; 3. a pressure vessel flange; 4. adjusting the tool; 41. a fixing mechanism; 411. equilateral angle steel; 412. a reducing bolt; 42. an adjusting mechanism; 421. a polytetrafluoroethylene rod; 422. adjusting a jackscrew; 423. a second hex bolt; 424. angle steel; 425. a backing plate; 426. self-tapping screw; 43. a first hex bolt; 44. a long screw; 45. a flat gasket; 46. a compression nut; 5. a main bolt hole; 6. a groove.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are used, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the indicated apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it should be noted that unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
FIG. 1 is a schematic view of a lower internals in-situ adjustment apparatus for a nuclear power plant according to the present invention; FIG. 2 is a schematic installation view of a lower internals positioning apparatus for a nuclear power plant according to the present invention, as shown in FIGS. 1-2, which illustrates a preferred embodiment, and which includes a pressure vessel 1, a pressure vessel flange 3 disposed on an upper surface of the pressure vessel 1, a basket flange 2 disposed on an upper surface of the pressure vessel flange 3, and a plurality of adjustment tools 4 fixed to the basket flange 2, wherein the adjustment tools 4 are four and are distributed on the upper surface of the basket flange 2 in phases of 0 DEG, 90 DEG, 180 DEG, and 270 DEG clockwise;
each adjusting tool 4 comprises a fixing mechanism 41 and an adjusting mechanism 42, the fixing mechanism 41 is arranged on the hanging basket flange 2, the adjusting mechanism 42 is arranged on the pressure vessel flange 3, the adjusting mechanism 42 comprises a polytetrafluoroethylene rod 421 and adjusting jackscrews 422 arranged on two sides of the polytetrafluoroethylene rod 421, the adjusting jackscrews 422 are used for adjusting the positions of the polytetrafluoroethylene rod 421, a connecting mechanism is arranged at the upper end of the polytetrafluoroethylene rod 421, and the polytetrafluoroethylene rod 421 is rotatably connected with the fixing mechanism 41 through the connecting mechanism. In this embodiment, the pressure vessel flange 3 is welded to the pressure vessel 1 or is fixed by bolts, and the basket flange 2 is fixed to the pressure vessel flange 3 by bolts. The adjusting tool 4 is distributed in the phase of 0 degree, 90 degree, 180 degree and 270 degree on the upper surface of the basket flange 2, so that fine adjustment of four directions of the lower internal components of the pile and anticlockwise and clockwise rotation can be realized. The adjusting tool 4 in this embodiment is detachably connected to the pressure vessel flange 3 and the basket flange 2. In this embodiment, the adjusting jackscrew 422 is turned, so that the adjusting jackscrew 422 pushes the polytetrafluoroethylene rod 421 to drive the lower internal components to move or rotate. In this embodiment, the in-place adjustment of the lower in-pile components by the adjustment tool 4 can be performed in a trial manner to realize the rapid and accurate adjustment of the lower in-pile components after the first in-pile process, so that the problem that the traditional adjustment process is rough and chapter-free is effectively solved, the standard adjustment operation of the lower in-pile components is realized, the tool manufacturing cost is saved, the installation efficiency is improved, and the risk of equipment damage is reduced.
Further, as a preferred embodiment, the basket flange 2 is annular, the upper surface of the basket flange 2 is a basket supporting surface, a plurality of main bolt holes are uniformly formed in the basket supporting surface, the included angle between two adjacent main bolt holes is 6 main bolt holes 0 degrees, and the fixing mechanism 41 is arranged in the two adjacent main bolt holes. In this embodiment, the included angle between the main bolt holes can be set as required, and the fixing mechanism 41 is connected with the main bolt holes by threads.
Further, as a preferred embodiment, the fixing mechanism 41 includes an equilateral angle steel 411 with an included angle of 0 ° with respect to the 6 main bolt holes, and reducing bolts 412 provided on two free ends of the equilateral angle steel 411, the two reducing bolts 412 being located in the two adjacent main bolt holes, and an included angle portion of the equilateral angle steel 411 being connected with the connecting mechanism. In this embodiment, as shown in fig. 1, the variable diameter bolt 412 is screwed to the main bolt hole. The included angle part of the equilateral angle steel 411 in the embodiment is rotatably connected with the connecting mechanism.
Further, as a preferred embodiment, the connecting mechanism comprises a first hexagonal bolt and a long screw, the first hexagonal bolt is in threaded connection with the long screw, the long screw passes through the included angle part and is connected with the upper end of the polytetrafluoroethylene rod 421, and the first hexagonal bolt is used for fixing the included angle part on the long screw. As shown in fig. 1, the outer peripheral wall of the long screw is provided with an external thread, the inner wall of the first hexagonal bolt is provided with an internal thread for matching with the external thread on the screw, and the long screw is used for fixing the equilateral angle steel 411 on the polytetrafluoroethylene rod 421.
Further, as a preferred embodiment, the connection mechanism further comprises a flat washer and a compression nut, the long screw is further provided with the compression nut and the flat washer, the compression nut is located at the lower side of the included angle part, and the flat washer is located between the compression nut and the polytetrafluoroethylene rod 421.
Further, as a preferred embodiment, a groove is formed between the inner peripheral wall of the basket flange 2 and the upper surface of the pressure vessel flange 3, a centering pin hole is formed in the bottom wall of the groove, the polytetrafluoroethylene rod 421 is disposed in the centering pin hole, and a gap of at least 5 compression nut mm is formed between the outer peripheral wall of the polytetrafluoroethylene rod 421 and the inner peripheral wall of the centering pin hole.
Further, as a preferred embodiment, the adjusting mechanism 42 further includes a second hexagonal bolt 423 and an angle steel 424, one end of the adjusting top wire 422 penetrates through the angle steel 424 and is rotatably connected with the polytetrafluoroethylene rod 421, and the second hexagonal bolt 423 is disposed on the angle steel 424 and is used for fixing the angle steel 424 on the bottom wall of the groove.
Further, as a preferred embodiment, the self-tapping screw comprises a backing plate 425 compression nut and a self-tapping screw 426 main bolt hole, wherein the backing plate 425 compression nut is arranged on the polytetrafluoroethylene rod 421, the self-tapping screw 426 main bolt hole is used for fixing the backing plate 425 compression nut on the polytetrafluoroethylene rod 421, and one end of the adjusting jackscrew 422 is rotationally connected with the backing plate 425 compression nut.
Further, as a preferred embodiment, the pressure vessel further comprises a dial indicator, wherein the dial indicator is arranged on the bottom wall of the groove, and a measuring rod of the dial indicator is abutted against a lower internal pile member positioned in the pressure vessel 1.
The preferred method of positioning the nuclear power plant lower internals according to the present invention is described below.
A method for adjusting the position of a nuclear power station lower part in-pile component comprises the following steps:
s1, hanging a lower internal pile component into a pressure vessel 1 through annular hanging equipment, and hanging 95% -99% of the weight of the lower internal pile component through the annular hanging equipment so that the lower internal pile component reaches a hanging critical state; in this embodiment, after the lower internals are first suspended into the pressure vessel 1, the critical state is reached using ring suspended equipment at about 95% -99% by weight. The four sets of adjusting tools 4 manufactured through on-site design are matched to realize horizontal movement of the lower internal components of the pile in the pressure container 1 along four directions of 0-180 degrees and 90-270 degrees and clockwise or anticlockwise rotation along the center circumference of the pressure container 1, and the adjusting process monitors the adjusting quantity in real time by means of a dial indicator. The position of the lower internal pile component is adjusted until the gap between the outlet nozzle of the hanging basket of the lower internal pile component and the outlet connecting pipe of the pressure vessel 1 is 2.35 plus or minus 0.13mm, the gap between the flange of the lower internal pile component and the inner wall of the pressure vessel 1 is 6 plus or minus 1mm, and the lower pin shaft can be inserted into the centering pin hole of the pressure vessel 1 after the centering pin is arranged on the flange of the lower internal pile component.
S2, determining an adjusting mode and an adjusting amount of the adjusting tool 4 according to a first inspection result after the lower internal pile member is lifted into the pressure container 1;
the adjusting modes comprise a horizontal adjusting mode and a circumferential adjusting mode;
the horizontal adjustment mode is as follows: loosening the adjusting jackscrews 422 in the adjusting tools 4 positioned at the positions of 90 degrees and 270 degrees, loosening the adjusting jackscrews 422 positioned at the side close to 90 degrees in the adjusting tools 4 positioned at the positions of 0 degrees and 180 degrees, and tightening the adjusting jackscrews 422 positioned at the side close to 270 degrees in the adjusting tools 4 positioned at the positions of 0 degrees and 180 degrees to realize the translation of the lower internal pile component towards the direction of 90 degrees, and loosening and tightening the corresponding adjusting jackscrews 422 towards other angular translations in the same way;
the circumferential adjustment mode is as follows: the rotation of the lower internals is achieved by loosening the adjustment jackscrews 422 located at one side of 0 °, 90 °, 180 °, 270 °, and then tightening the adjustment jackscrews 422 located at the other side of 0 °, 90 °, 180 °, 270 °. When the lower in-pile member moves and rotates in the pressure container 1, the position movement of the in-pile member in the pressure container 1 can be monitored in real time by monitoring the change of the readings of the dial indicator in the adjustment process, so that the accurate adjustment of the in-pile member is realized. And after each adjustment, the weight of the lower in-pile components is completely released on the hanging basket supporting surface, whether the positions of the lower in-pile components meet the design requirements is checked and verified, and if the positions of the lower in-pile components still do not meet the design requirements, the adjustment is performed again until the positions of the lower in-pile components meet the design requirements.
In this embodiment, after the lower internals are first suspended into the pressure vessel 1, the nozzle gap of the lower internals, the gap between the flange of the lower internals and the inner wall of the pressure vessel 1, and the trial assembly result of the centering pin are checked and verified, and if the above three components meet the design requirements at the same time, the position of the lower internals can be adjusted without any need.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. The in-situ adjusting device for the lower part of the nuclear power station reactor internals is characterized by comprising a pressure vessel, a pressure vessel flange arranged on the upper surface of the pressure vessel, a hanging basket flange arranged on the upper surface of the pressure vessel flange, and a plurality of adjusting tools fixed on the hanging basket flange, wherein the number of the adjusting tools is four, and the adjusting tools are distributed on the upper surface of the hanging basket flange in a clockwise phase of 0 degree, 90 degrees, 180 degrees and 270 degrees;
each adjusting tool comprises a fixing mechanism and an adjusting mechanism, wherein the fixing mechanism is arranged on the hanging basket flange, the adjusting mechanism is arranged on the pressure vessel flange, the adjusting mechanism comprises a polytetrafluoroethylene rod and adjusting jackscrews arranged on two sides of the polytetrafluoroethylene rod, the adjusting jackscrews are used for adjusting the positions of the polytetrafluoroethylene rod, a connecting mechanism is arranged at the upper end of the polytetrafluoroethylene rod, and the polytetrafluoroethylene rod is connected with the fixing mechanism in a rotating mode through the connecting mechanism.
2. The device for adjusting the position of the nuclear power plant lower reactor internals according to claim 1, wherein the basket flange is annular, the upper surface of the basket flange is a basket supporting surface, a plurality of main bolt holes are uniformly formed in the basket supporting surface, the included angle between two adjacent main bolt holes is 60 degrees, and the fixing mechanism is arranged in the two adjacent main bolt holes.
3. The device for adjusting the position of the nuclear power plant lower internal reactor component according to claim 2, wherein the fixing mechanism comprises equilateral angle steel with an included angle of 60 degrees and reducing bolts arranged on two free ends of the equilateral angle steel, the two reducing bolts are positioned in two adjacent main bolt holes, and the included angle part of the equilateral angle steel is connected with the connecting mechanism.
4. A device for adjusting the position of a lower internals of a nuclear power plant as claimed in claim 3, wherein the connection means comprises a first hexagonal bolt and a long screw, the first hexagonal bolt being screwed with the long screw, the long screw passing through the angle portion and being connected with the upper end of the polytetrafluoroethylene rod, the first hexagonal bolt being for fixing the angle portion to the long screw.
5. The device for adjusting the position of the nuclear power plant lower internals according to claim 4, wherein the connecting mechanism further comprises a flat washer and a compression nut, the compression nut and the flat washer are further arranged on the long screw rod, the compression nut is positioned at the lower side of the included angle part, and the flat washer is positioned between the compression nut and the polytetrafluoroethylene rod.
6. The device for adjusting the position of the lower internals of a nuclear power plant according to claim 1, wherein a groove is formed between the inner peripheral wall of the basket flange and the upper surface of the pressure vessel flange, a centering pin hole is formed in the bottom wall of the groove, the polytetrafluoroethylene rod is arranged in the centering pin hole, and a gap of at least 5mm is formed between the outer peripheral wall of the polytetrafluoroethylene rod and the inner peripheral wall of the centering pin hole.
7. The in-place adjusting device for lower internals of a nuclear power plant as claimed in claim 6, wherein the adjusting mechanism further comprises a second hexagonal bolt and an angle steel, one end of the adjusting jackscrew penetrates through the angle steel and is rotatably connected with the polytetrafluoroethylene rod, and the second hexagonal bolt is arranged on the angle steel for fixing the angle steel on the bottom wall of the groove.
8. The device for adjusting the position of the nuclear power plant lower internals according to claim 6, further comprising a backing plate and self-tapping screws, wherein the backing plate is provided on the polytetrafluoroethylene rod, the self-tapping screws are used for fixing the backing plate on the polytetrafluoroethylene rod, and one end of the adjusting jackscrew is rotatably connected with the backing plate.
9. The device for adjusting the position of the lower internals of a nuclear power plant according to claim 6, further comprising a dial indicator, wherein the dial indicator is arranged on the bottom wall of the groove, and the measuring rod of the dial indicator is abutted against the lower internals positioned in the pressure vessel.
10. A method for adjusting the position of a nuclear power plant lower internals, comprising the device for adjusting the position of a nuclear power plant lower internals according to any one of claims 1 to 9, the method comprising:
s1, hanging a lower internal pile component into the pressure vessel through ring hanging equipment, and hanging 95% -99% of the weight of the lower internal pile component through the ring hanging equipment so that the lower internal pile component reaches a hanging critical state;
s2, determining an adjusting mode and an adjusting amount of the whole tool according to a first inspection result after the lower internal pile member is lifted into the pressure container;
the adjusting modes comprise a horizontal adjusting mode and a circumferential adjusting mode;
the horizontal adjustment mode is as follows: loosening the adjusting jackscrews in the adjusting tools at the positions of 90 degrees and 270 degrees, loosening the adjusting jackscrews close to the side of 90 degrees in the adjusting tools at the positions of 0 degrees and 180 degrees, and loosening and tightening the corresponding adjusting jackscrews in the same way to other angular translations by tightening the adjusting jackscrews close to the side of 270 degrees in the adjusting tools at the positions of 0 degrees and 180 degrees;
the circumferential adjustment mode is as follows: loosening the adjusting jackscrews positioned at one side of 0 DEG, 90 DEG, 180 DEG and 270 DEG, and then tightening the adjusting jackscrews positioned at the other side of 0 DEG, 90 DEG, 180 DEG and 270 DEG to realize the rotation of the lower internals.
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