CN113175920A - Perpendicularity adjusting method for AP1000 reloading machine sleeve - Google Patents
Perpendicularity adjusting method for AP1000 reloading machine sleeve Download PDFInfo
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- CN113175920A CN113175920A CN202110404915.9A CN202110404915A CN113175920A CN 113175920 A CN113175920 A CN 113175920A CN 202110404915 A CN202110404915 A CN 202110404915A CN 113175920 A CN113175920 A CN 113175920A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/10—Plumb lines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/12—Instruments for setting out fixed angles, e.g. right angles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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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 perpendicularity adjusting method for an AP1000 reloading machine sleeve, which is characterized by comprising the following steps of: adjusting the verticality of the outer sleeve; step two: adjusting the levelness of the balance arm of the inner sleeve; step three: adjusting the concentricity of the inner sleeve and the outer sleeve, and the fourth step: adjusting the gap between the inner sleeve and the guide wheel and ensuring that the guide wheel component is on a plumb line; step five: and (6) checking and accepting. The method can ensure the verticality of the outer sleeve, ensure that the guide wheel is arranged on a plumb line, ensure that the gap between the guide wheel and the inner sleeve meets the requirement of a drawing, and ensure that the running verticality and the friction force of the inner sleeve also meet the requirement.
Description
Technical Field
The invention relates to a perpendicularity adjusting method for an AP1000 reloading machine sleeve, and belongs to the technical field of perpendicularity adjusting of AP1000 reloading machine sleeves.
Background
The AP1000 core consists of 157 groups of fuel assemblies, with a theoretical minimum gap between adjacent fuel assemblies of only 1.02 mm. This requires a very high operating verticality during the up-and-down movement of the fuel assembly carried by the inner sleeve of the refueling machine, otherwise, during the normal refueling of the refueling machine, the operated assembly is easily scratched from the adjacent assembly, and the assembly intermediate grid is damaged.
In order to prevent the fuel from being damaged in the process of the up-and-down movement of the fuel, the AP1000 reloading machine is provided with overload and underload protection. If the outer sleeve hangs down straightness, inner and outer sleeve concentricity, inner skleeve balance arm levelness, the clearance isoparametric adjustment of outer sleeve leading wheel and inner skleeve are not suitable, though can satisfy the straightness requirement of hanging down of inner skleeve operation occasionally, the too big condition of inner skleeve running friction still can appear, influence dress unloading efficiency and leading wheel life-span.
The prior art uses the distance between the non-machining surface of the outer sleeve outer wall and the plumb line to adjust the verticality of the outer sleeve, which is not accurate enough because the non-machining surface has larger manufacturing error. The adjustment of the concentricity of the inner sleeve and the outer sleeve by adjusting the thickness of the rubber block gasket at the lower end of the main lifting horizontal shaft has certain limitation because the torsion degree of the horizontal section of the inner sleeve and the concentricity of the inner sleeve in the direction of the guide wheel cannot be adjusted by the method. The running verticality of the inner sleeve is tracked through the laser emitting device arranged at the lower end of the inner sleeve, the gap between each layer of guide wheel and the inner sleeve is adjusted accordingly, the problems of complex operation, large measurement interference deviation and overlong consumed time exist, the coil spring of a gas source pipe coil of a fuel gripping apparatus cylinder and the coil spring of a cable coil of an underwater camera are not considered in the whole process, and the eccentric force generated by the coil spring of a proximity switch cable coil of the gripping apparatus to the top of the inner sleeve has a large influence on the posture of the inner sleeve. This factor can cause the inner skleeve operation straightness that hangs down that measures to be great, and adjusting the leading wheel clearance under this condition can lead to the leading wheel subassembly not to be on a plumb line, can produce the big problem of inner skleeve running friction.
In order to ensure that the friction force meets the requirement when the inner sleeve operates and ensure the verticality in the operation process of the inner sleeve, the invention needs to invent a sleeve verticality adjusting process.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to ensure that the inner skleeve frictional force meets the demands when operation, guarantee the straightness that hangs down in the inner skleeve operation process simultaneously again.
In order to solve the technical problem, the technical scheme of the invention is to provide a perpendicularity adjusting method for an AP1000 reloading machine sleeve, which is characterized by comprising the following steps of: adjusting the verticality of the outer sleeve; step two: adjusting the levelness of the balance arm of the inner sleeve; step three: adjusting the concentricity of the inner sleeve and the outer sleeve, and the fourth step: adjusting the gap between the inner sleeve and the guide wheel and ensuring that the guide wheel component is on a plumb line; step five: and (6) checking and accepting.
Preferably, the first step comprises the following steps of 1.1: removing all guide wheel assemblies on the outer sleeve;
step 1.2: connecting an outer sleeve perpendicularity adjusting tool with bolt holes in the upper left corners of the first pair of guide wheel assembly mounting seats; connecting the outer sleeve perpendicularity adjusting tool with a bolt hole in the lower left corner of the seventh pair of guide wheel assembly mounting seats;
step 1.3: hanging a lead weight on the outer sleeve perpendicularity adjusting tool;
step 1.4: measuring the distance between the plumb line of the plumb bob and the machining flange surface of the first pair of guide wheel assembly mounting seats by using a steel plate ruler;
step 1.5: measuring the distance between the plumb line of the plumb bob and the machining flange surface of the mounting seat of the seventh pair of guide wheel assemblies by using a steel plate ruler;
step 1.6: calculating the difference between the measured values in the step 1.4 and the step 1.5 as the verticality in the vertical direction;
step 1.7: measuring the distance between the plumb bob plumb line and the outer sleeve perpendicularity adjusting tool on the seventh pair of guide wheel assembly mounting seats by using a steel plate ruler, wherein the distance is the perpendicularity in the horizontal direction;
step 1.8: and (4) according to the results of the steps 1.6 and 1.7, adjusting the thickness of the perpendicularity adjusting gasket of the outer sleeve until the values obtained in the steps 1.6 and 1.7 are within +/-4.76 mm.
Preferably, the second step includes a step 2.1 of adjusting the lengths of the first strand of steel wire rope and the second strand of steel wire rope to ensure that the horizontal cross arm is kept horizontal.
Preferably, the third step: step 3.1, lifting the inner sleeve until the top of the inner sleeve is slightly exposed out of the top of the outer sleeve; step 3.2: measuring the distances between the four right-angle edges of the inner sleeve and the four machining lines of the flange plate on the upper part of the outer sleeve; step 3.3: and (3) according to the measurement result of the step (3.2), adjusting the position of the wire rope reel to ensure that the inner sleeve is positioned at the center of the outer sleeve and does not twist in the horizontal direction.
Preferably, the fourth step: comprises the following steps of 4.1: descending the inner sleeve until the bottom of the inner sleeve is slightly lower than the seventh pair of guide wheel seats; step 4.2: without adding a gasket, installing a guide wheel assembly on one side, laterally pushing an inner sleeve to enable the inner sleeve to be tightly attached to the guide wheel assembly, plugging the space between the guide wheel assembly on the other side and the inner sleeve by using a 2.3mm thick feeler gauge, measuring the gap between the guide wheel assembly on the side and a seventh pair of guide wheel assembly mounting seats, wherein half of the measured value is the theoretical thickness of the guide wheel assemblies on the two sides with the added gasket; step 4.3: because the outer sleeve is not absolutely vertical, in order to ensure that the clearance between the inner sleeve and the periphery of the guide wheel assembly is uniform, the thicknesses of the gaskets added on the two sides are adjusted by combining the perpendicularity of the outer sleeve measured after the adjustment in the step one on the basis of the theoretical thickness obtained in the step 4.2, and part of the gaskets are withdrawn from one side of the outer sleeve which is deviated to the direction and added to the other side of the outer sleeve to finish the installation of a seventh pair of guide wheel assemblies; step 4.4: screwing the two outer sleeve perpendicularity adjusting tools into the two bolt holes in the upper parts of the first pair of guide wheel assembly mounting seats, mounting the first pair of guide wheel assemblies, mounting the guide wheel gap adjusting tool between the two outer sleeve perpendicularity adjusting tools, and suspending the lead weight in a middle gap of the guide wheel gap adjusting tool; step 4.5: taking the seventh pair of guide wheel assemblies which are installed in the step 4.3 as a reference, and ensuring that the distance between the outer vertical surfaces of the rest six pairs of guide wheel assemblies and the plumb line of the plumb bob is equal to the distance between the outer vertical surface of the seventh pair of guide wheel assemblies and the plumb line of the plumb bob by adjusting the thickness of the gasket; step 4.6: the other guide wheel is mounted according to the method of steps 4.4 and 4.5.
Preferably, the fifth step includes: step 5.1: descending an inner sleeve, attaching a target to the position, close to a gripping apparatus of a fuel assembly, of the lower portion of the inner sleeve, ascending and descending the inner sleeve 3 times respectively, measuring the running verticality of the inner sleeve by using a total station instrument, wherein the deviation is required to be not more than 3.18mm, when the inner sleeve of a refueling machine is loaded and unloaded, the eccentric force generated by the gripping apparatus, the air source pipe winding drum of the cylinder, the underwater camera cable winding drum of the gripping apparatus, the approach switch cable winding drum of the gripping apparatus, to the top of the inner sleeve, has large influence on the posture of the inner sleeve, the measured running verticality of the inner sleeve is large, the connection between the air source pipe and the cable and the top of the inner sleeve needs to be released, and the measurement is carried out after the influence of the eccentric force is eliminated. During debugging of the nuclear island, the inner sleeve can carry 100% of simulated false fuel assemblies, the process of inserting the fuel assemblies into the reactor core is simulated in the reactor core area, the running verticality of the inner sleeve is measured, and the measured value is required to be within 1 mm; step 5.2: the running friction force of the inner sleeve is verified and divided into no-load acceptance and on-load acceptance, and the inner sleeve in the whole stroke range is required to run smoothly at the highest speed, and the phenomena of blockage, overload and underload are avoided. The friction force is generally controlled within 10 kg;
step 5.3: and if the step 5.1 and the step 5.2 are unqualified, repeating the step one to the step four, and readjusting until the product is qualified.
This application has following better effect for prior art this application:
firstly, the unique design concept of the AP1000 loading and reloading machine is utilized to guide the adjustment of the perpendicularity of the sleeve, the adjustment time is short, the one-time success rate is high, and the two indexes of the running friction force of the inner sleeve of the loading and reloading machine and the running perpendicularity of the inner sleeve can be ensured to meet the requirements.
The AP1000 dress reloading machine unique design theory is: the AP1000 reloader does not rely on guide wheels to ensure that the inner sleeve moves up and down vertically. The AP1000 reloader is designed to ensure that the inner sleeve maintains a vertical attitude in a freely suspended state. The guide wheels serve only to limit the movement of the inner sleeve in the horizontal direction. Therefore, as long as the perpendicularity of the outer sleeve is ensured, the guide wheel is arranged on a plumb line, the gap between the guide wheel and the inner sleeve meets the drawing requirement, and the running perpendicularity and friction force of the inner sleeve naturally meet the requirement.
And secondly, the perpendicularity parameter of the outer sleeve can be accurately reflected by measuring the perpendicularity of the outer sleeve by utilizing the machining characteristic of the outer sleeve. The outer sleeve is machined by one-time clamping and one-time positioning, all mechanical characteristics are finished by one-time machining, and the machining precision is high. Therefore, the machining characteristics of the guide wheel assembly mounting seat on the outer sleeve can reflect the mounting verticality of the sleeve.
Thirdly, the influence of the levelness of the balance arm of the inner sleeve on the running concentricity of the inner sleeve is considered. The levelness of the balance arm is adjusted to ensure that the inner sleeve and the outer sleeve keep concentric in the up-and-down movement process, so that the probability of collision and abrasion between the inner sleeve and the guide wheel can be reduced, and the friction force is reduced.
Fourthly, the concentricity of the inner sleeve and the outer sleeve is adjusted more reasonably. The direction of the steel wire rope winch is adjusted to ensure that the inner sleeve is positioned at the center of the outer sleeve and the torsion degree on the horizontal section of the inner sleeve meets the requirement, so that the direction symmetry of the right-angle edge of the inner sleeve in the guide wheel is ensured.
Fifthly, the seventh pair of guide wheel clearances as the adjustment reference is more reasonable. According to the design drawing, the theoretical clearance between the inner sleeve and the guide wheel is 1.6mm, and the theoretical clearance is converted into the clearance between the side edge of the inner sleeve and the side edge of the guide wheel and is 1.13 mm. The inner sleeve is tightly attached to the guide wheel without the gasket, the clearance is designed on the other side by using a feeler gauge, and the thickness of the gasket on two sides is obtained by actually measuring the distance between the guide wheel on the other side and the guide wheel seat.
Sixthly, the plumb line of the lead weight is used, and the other six pairs of guide wheels are arranged on the plumb line on one side of the seventh pair of guide wheels which are adjusted. The measurement is convenient and fast, and the guide wheel reloading time is short.
And seventhly, measuring the running verticality of the inner sleeve by using a total station. The measuring time is short, and the accuracy is high.
The perpendicularity adjusting method of the AP1000 charging and replacing machine sleeve is developed according to the unique design concept of the AP1000 charging and replacing machine, and the theoretical basis is sufficient. The AP1000 reloader does not rely on guide wheels to ensure that the inner sleeve moves up and down vertically. The AP1000 reloader is designed to ensure that the inner sleeve maintains a vertical attitude in a freely suspended state. The guide wheels serve only to limit the movement of the inner sleeve in the horizontal direction. The guiding wheel gap adjustment is guided, so that the guiding wheel is arranged on a plumb line as long as the perpendicularity of the outer sleeve is ensured, the gap between the guiding wheel and the inner sleeve meets the drawing requirement, and the running perpendicularity and friction force of the inner sleeve naturally meet the requirement.
Drawings
Fig. 1 is a schematic structural view of an AP1000 refueling machine sleeve;
fig. 2 is a top view of a schematic structural view of an AP1000 refueling machine sleeve;
FIG. 3 is a schematic view of the outer sleeve perpendicularity adjustment;
FIG. 4 is a schematic view of leveling adjustment of the balance arm;
fig. 5 is a schematic diagram of guide wheel gap adjustment.
The reference numbers in the figures are: 1-an outer sleeve; 2-a ball bearing; 3-fixing the sleeve; 4-adjusting gasket for perpendicularity of outer sleeve; 5-a guide wheel assembly; 6-inner sleeve; 7-a steel wire rope; 8-a gasket 9-a first pair of guide wheel assembly mounting seats; 10-a seventh pair of guide wheel assembly mounting seats; 11-outer sleeve perpendicularity adjusting tool; 12-plummet 13-first strand of wire rope; 14-a balance arm; 15-a second strand of wire rope; 16-a first pair of guide wheel assemblies; 17-guide wheel clearance adjusting tooling; 18-wire rope drum.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 5, a perpendicularity adjusting method for an AP1000 refueling machine sleeve is characterized by comprising the following steps: adjusting the verticality of the outer sleeve; step two: adjusting the levelness of the balance arm of the inner sleeve; step three: adjusting the concentricity of the inner sleeve and the outer sleeve, and the fourth step: adjusting the gap between the inner sleeve and the guide wheel and ensuring that the guide wheel component is on a plumb line; step five: and (6) checking and accepting.
The method comprises the following steps: outer sleeve perpendicularity adjustment
Step 1.1: removing all guide wheel assemblies (5) on the outer sleeve (1) shown in figure 1;
step 1.2: screwing the outer sleeve perpendicularity adjusting tool (11) shown in fig. 3 into the bolt holes at the upper left corners of the first pair of guide wheel assembly mounting seats (9) shown in fig. 3; screwing the outer sleeve perpendicularity adjusting tool (11) shown in fig. 3 into a left lower corner bolt hole of a seventh pair of guide wheel assembly mounting seats (10) shown in fig. 3;
step 1.3: as shown in fig. 3, hanging lead plummet (12);
step 1.4: measuring the distance between a plumb line of the lead weight (12) shown in the figure 3 and the machined flange surface of the first pair of guide wheel assembly mounting seats (9) by using a steel plate ruler;
step 1.5: measuring the distance between a plumb line of the lead weight (12) shown in the figure 3 and the machined flange surface of the seventh pair of guide wheel assembly mounting seats (10) by using a steel plate ruler;
step 1.6: the difference between the measured values in the step 1.4 and the step 1.5 is the verticality in the vertical direction;
step 1.7: measuring the distance between the plumb line of the lead weight (12) shown in the figure 3 and the outer sleeve perpendicularity adjusting tool (11) on the seventh pair of guide wheel assembly mounting seats (10) by using a steel plate ruler, wherein the distance is the perpendicularity in the horizontal direction;
step 1.8: according to the results of the steps 1.6 and 1.7, the thickness of the perpendicularity adjusting shim (4) of the outer sleeve shown in the figure 1 is adjusted until the values obtained in the steps 1.6 and 1.7 are within +/-4.76 mm.
Step two: levelness adjustment of inner sleeve balance arm
Step 2.1: the lengths of a first strand of steel wire rope (13) and a second strand of steel wire rope (15) shown in the figure 4 are adjusted to ensure that the horizontal cross arm (14) is kept horizontal;
step three: concentricity adjustment of inner and outer sleeves
Step 3.1: lifting the inner sleeve (6) until the top of the inner sleeve (6) is slightly exposed out of the top of the outer sleeve (1);
step 3.2: measuring the distance between four right-angle edges of the inner sleeve (6) and four machining lines of the flange plate on the upper part of the outer sleeve (1);
step 3.3: according to the measurement result of the step 3.2, the position of the wire rope reel (18) is adjusted to ensure that the inner sleeve (6) is positioned at the center of the outer sleeve (1) and does not twist in the horizontal direction;
step four: adjusting the gap between the inner sleeve and the guide wheel
Step 4.1: the inner sleeve (6) is descended until the bottom of the inner sleeve (6) is slightly lower than the seventh pair of guide wheel seats (10);
step 4.2: and (3) without adding a gasket (8), installing a guide wheel assembly (5) at one side, laterally pushing an inner sleeve (6) to enable the inner sleeve (6) to be attached to the guide wheel assembly (5), plugging the space between the guide wheel assembly (5) at the other side and the inner sleeve (6) by using a 2.3mm thick feeler gauge, and measuring the gap between the guide wheel assembly (5) at the side and a seventh pair of guide wheel assembly mounting seats (10). Half of the measured value is the theoretical thickness of the spacer (8) added into the guide wheel assemblies (5) on two sides.
Step 4.3: because the outer sleeve (1) is not absolutely vertical, in order to ensure that the clearance between the inner sleeve (6) and the periphery of the guide wheel assembly (5) is uniform, the thickness of the gaskets (8) added on the two sides is adjusted by combining the measured verticality of the outer sleeve (1) after the adjustment in the step one on the basis of the theoretical thickness obtained in the step 4.2, and part of the gaskets (8) is withdrawn from one side of the outer sleeve (1) which is deviated to be added to the other side, so that the seventh pair of guide wheel assemblies (5) is installed;
step 4.4: as shown in fig. 5, two outer sleeve perpendicularity adjusting tools (11) are screwed into two bolt holes in the upper parts of the first pair of guide wheel assembly mounting seats (9), a first pair of guide wheel assemblies (16) are mounted, a guide wheel gap adjusting tool (17) is mounted between the two outer sleeve perpendicularity adjusting tools (11), and a lead weight (12) is hung in a middle gap of the guide wheel gap adjusting tool (17);
step 4.5: and (3) taking the seventh pair of guide wheel assemblies (5) which are installed in the step (4.3) as a reference, and ensuring that the distance between the outer vertical surfaces of the rest six pairs of guide wheel assemblies and the plumb line of the plumb bob (12) is equal to the distance between the outer vertical surface of the seventh pair of guide wheel assemblies (5) and the plumb line of the plumb bob (12) by adjusting the thickness of the gasket (8).
Step 4.6: the guide wheel on the other side is installed according to the method of the steps 4.4 and 4.5;
step five: acceptance inspection
Step 5.1: descending the inner sleeve (6), attaching a target at the position, close to the fuel assembly gripping apparatus, of the lower portion of the inner sleeve (6), ascending and descending the inner sleeve (6) 3 times respectively, and measuring the running verticality of the inner sleeve (6) by using a total station. The deviation is required not to exceed 3.18 mm. It should be noted that when the inner sleeve (6) of the refueling machine is unloaded, the eccentric force generated by the coil spring of the cable drum of the proximity switch of the gripping apparatus has a large influence on the posture of the inner sleeve due to the coil spring of the air source pipe of the cylinder of the fuel gripping apparatus, the coil spring of the cable drum of the underwater camera and the eccentric force generated by the coil spring of the cable drum of the proximity switch of the gripping apparatus on the top of the inner sleeve, so that the measured operation verticality of the inner sleeve (6) is large, the connection between the air source pipe and the cable and the top of the inner sleeve needs to be released, and the measurement is performed after the influence of the eccentric force is eliminated. During debugging of the nuclear island, the inner sleeve (6) can be loaded with 100% of simulated false fuel assemblies, the process of inserting the fuel assemblies into the reactor core is simulated in the reactor core area, the running verticality of the inner sleeve (6) is measured, and the measured value is required to be within 1 mm;
step 5.2: the running friction of the inner sleeve (6) is also verified. The method comprises no-load acceptance and on-load acceptance. The inner sleeve (6) can run smoothly at the highest speed gear within the whole travel range, and the phenomena of blockage, overload and underload are avoided. The friction force is generally controlled within 10 kg;
step 5.3: and if the step 5.1 and the step 5.2 are unqualified, repeating the step one to the step four, and readjusting until the product is qualified.
Claims (6)
1. The perpendicularity adjusting method for the sleeve of the AP1000 reloading machine is characterized by comprising the following steps of: adjusting the verticality of the outer sleeve; step two: adjusting the levelness of the balance arm of the inner sleeve; step three: adjusting the concentricity of the inner sleeve and the outer sleeve, and the fourth step: adjusting the gap between the inner sleeve and the guide wheel and ensuring that the guide wheel component is on a plumb line; step five: and (6) checking and accepting.
2. The perpendicularity adjusting method for the AP1000 refueling machine sleeve as claimed in claim 1, wherein the first step comprises the following steps of 1.1: removing all guide wheel assemblies (5) on the outer sleeve (1);
step 1.2: connecting an outer sleeve perpendicularity adjusting tool (11) with bolt holes in the upper left corners of the first pair of guide wheel assembly mounting seats (9); connecting an outer sleeve perpendicularity adjusting tool (11) with a bolt hole in the lower left corner of a seventh pair of guide wheel assembly mounting seats (10);
step 1.3: hanging a lead weight (12) on the outer sleeve perpendicularity adjusting tool (11);
step 1.4: measuring the distance between a plumb line of the plumb bob (12) and the machined flange surface of the first pair of guide wheel assembly mounting seats (9) by using a steel plate ruler;
step 1.5: measuring the distance between a plumb line of the plumb bob (12) and the machined flange surface of the seventh pair of guide wheel assembly mounting seats (10) by using a steel plate ruler;
step 1.6: calculating the difference between the measured values in the step 1.4 and the step 1.5 as the verticality in the vertical direction;
step 1.7: measuring the distance between the plumb line of the lead weight (12) and the outer sleeve perpendicularity adjusting tool (11) on the seventh pair of guide wheel assembly mounting seats (10) by using a steel plate ruler, wherein the distance is the perpendicularity in the horizontal direction;
step 1.8: and (4) according to the results of the steps 1.6 and 1.7, adjusting the thickness of the perpendicularity adjusting gasket (4) of the outer sleeve until the values obtained in the steps 1.6 and 1.7 are within +/-4.76 mm.
3. The perpendicularity adjusting method for the AP1000 refueling machine sleeve as recited in claim 1, wherein the second step comprises a step 2.1 of ensuring that the horizontal cross arm (14) is kept horizontal by the lengths of the first strand of steel wire rope (13) and the second strand of steel wire rope (15).
4. The perpendicularity adjusting method for the AP1000 refueling machine sleeve as recited in claim 1, wherein the third step: comprises the step 3.1 of lifting the inner sleeve (6) until the top of the inner sleeve (6) is slightly exposed out of the top of the outer sleeve (1); step 3.2: measuring the distance between four right-angle edges of the inner sleeve (6) and four machining lines of the flange plate on the upper part of the outer sleeve (1); step 3.3: and (3) according to the measurement result of the step (3.2), adjusting the position of the wire rope reel (18) to ensure that the inner sleeve (6) is positioned at the center of the outer sleeve (1) and torsion does not occur in the horizontal direction.
5. The perpendicularity adjusting method for the AP1000 refueling machine sleeve as recited in claim 1, wherein the fourth step is: comprises the following steps of 4.1: the inner sleeve (6) is descended until the bottom of the inner sleeve (6) is slightly lower than the seventh pair of guide wheel seats (10); step 4.2: without adding a gasket (8), installing a guide wheel assembly (5) on one side, laterally pushing an inner sleeve (6) to enable the inner sleeve (6) to be attached to the guide wheel assembly (5), tightly plugging the space between the guide wheel assembly (5) on the other side and the inner sleeve (6) by using a 2.3mm thick feeler gauge, measuring the gap between the guide wheel assembly (5) on the side and a seventh pair of guide wheel assembly mounting seats (10), wherein half of the measured value is the theoretical thickness of the guide wheel assemblies (5) on the two sides added with the gasket (8); step 4.3: because the outer sleeve (1) is not absolutely vertical, in order to ensure that the clearance between the inner sleeve (6) and the periphery of the guide wheel assembly (5) is uniform, the thickness of the gaskets (8) added on the two sides is adjusted by combining the measured verticality of the outer sleeve (1) after the adjustment in the step one on the basis of the theoretical thickness obtained in the step 4.2, and part of the gaskets (8) is withdrawn from one side of the outer sleeve (1) which is deviated to be added to the other side, so that the seventh pair of guide wheel assemblies (5) is installed; step 4.4: screwing the two outer sleeve perpendicularity adjusting tools (11) into two bolt holes in the upper parts of the first pair of guide wheel assembly mounting seats (9), mounting a first pair of guide wheel assemblies (16), mounting a guide wheel gap adjusting tool (17) between the two outer sleeve perpendicularity adjusting tools (11), and suspending a lead weight (12) in a middle gap of the guide wheel gap adjusting tool (17); step 4.5: taking the seventh pair of guide wheel assemblies (5) which are installed in the step 4.3 as a reference, and ensuring that the distance between the outer vertical surfaces of the rest six pairs of guide wheel assemblies and the plumb line of the plumb bob (12) is equal to the distance between the outer vertical surface of the seventh pair of guide wheel assemblies (5) and the plumb line of the plumb bob (12) by adjusting the thickness of the gasket (8); step 4.6: the other guide wheel is mounted according to the method of steps 4.4 and 4.5.
6. The perpendicularity adjusting method for the AP1000 refueling machine sleeve as recited in claim 1, wherein the fifth step comprises: step 5.1: descending an inner sleeve (6), attaching a target to the position, close to a fuel assembly gripping apparatus, of the lower portion of the inner sleeve (6), ascending and descending the inner sleeve (6) for 3 times respectively, measuring the running verticality of the inner sleeve (6) by using a total station instrument, wherein the deviation is required to be not more than 3.18mm, and when the inner sleeve (6) of a refueling machine is in no load, the measured running verticality of the inner sleeve (6) is large due to the fact that the eccentric force generated by the gripping apparatus, which is close to a switch cable reel coil spring, to the top of the inner sleeve has a large influence on the posture of the inner sleeve, the connection between a gas source pipe and a cable and the top of the inner sleeve needs to be released, and the measurement is performed after the influence of the eccentric force is eliminated. During debugging of the nuclear island, the inner sleeve (6) can be loaded with 100% of simulated false fuel assemblies, the process of inserting the fuel assemblies into the reactor core is simulated in the reactor core area, the running verticality of the inner sleeve (6) is measured, and the measured value is required to be within 1 mm; step 5.2: the running friction force of the inner sleeve (6) is also verified, and the running friction force is divided into no-load acceptance and on-load acceptance, so that the inner sleeve (6) in the whole stroke range can run smoothly at the highest speed, and the phenomena of blockage, overload and underload are avoided. The friction force is generally controlled within 10 kg; step 5.3: and if the step 5.1 and the step 5.2 are unqualified, repeating the step one to the step four, and readjusting until the product is qualified.
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