CN109968275A - A kind of live dismounting process of upper-part in-reactor component control rod guide tubes and bundles - Google Patents
A kind of live dismounting process of upper-part in-reactor component control rod guide tubes and bundles Download PDFInfo
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- CN109968275A CN109968275A CN201711464974.5A CN201711464974A CN109968275A CN 109968275 A CN109968275 A CN 109968275A CN 201711464974 A CN201711464974 A CN 201711464974A CN 109968275 A CN109968275 A CN 109968275A
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- guide cylinder
- tool
- lifting device
- guide
- cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/48—Spanners; Wrenches for special purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/023—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same using screws
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- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention belongs to pressurized-water reactor nuclear power plant reactor upper-part in-reactor component control rod guide tubes and bundles component technology fields, more particularly to a kind of live dismounting process of upper-part in-reactor component control rod guide tubes and bundles, purpose is to limit for physical condition, a kind of technique of upper-part in-reactor component guide cylinder dismounting is provided, by being used cooperatively for related tool, the dismounting of reliable, stable realization upper-part in-reactor component designated position guide cylinder.It is characterized in that, it includes the steps that guide cylinder fastening bolt is removed, top guide cylinder is removed, lower part guide cylinder is removed, lower part guide cylinder returns dress, top guide cylinder returns dress and the installation of guide cylinder fastening bolt.During the present invention can effectively realize that compacted clay liners build peace and debugging, the scene dismounting of upper-part in-reactor component designated position upper and lower part guide cylinder, can it is more reliable, more stable and it is accurate realize supporting pin dismounting and assembly, and can guarantee dismounting quality and avoid equipment damage, the present invention is readily applicable to manufactory's equipment assembling stage.
Description
Technical field
The invention belongs to pressurized-water reactor nuclear power plant reactor upper-part in-reactor component control rod guide tubes and bundles component technology fields, specifically
It is related to a kind of live dismounting process of upper-part in-reactor component control rod guide tubes and bundles.
Background technique
Pressurized-water reactor nuclear power plant upper-part in-reactor component is usually mounted with tens of groups of upper and lower part control rod guide tubes and bundles (hereinafter referred to as
Guide cylinder) component.As shown in scheme of installation 1, pass through flange and four fastening bolts and top branch among the guide cylinder of upper and lower part
Fagging is fixed, and is filled below by the pin hole interference on the two opening supports pins and upper core plate on the guide cylinder flange in the bottom of lower part
With being positioned, and magnitude of interference is larger.This elastic conjunction of lower part guide cylinder supporting pin tears open at entire guide cylinder naturally,
Fill the heavy difficult point of work.
Recommend the guide cylinder demolition, installation scheme used or technique as follows in currently manufactured factory takes or design side:
1. mount scheme:
According to assembling scheme or technique that equipment manufacturer takes in the manufacture assembling stage, all lower part guide cylinders are first installed: benefit
With two bolt tools and pressing plate is installed on fastening bolt threaded hole original on upper support board, to lower part guide cylinder top
Portion's flange applies downward pressure and bottom supporting pin is pressed into upper core plate pin hole, and finally makes guide cylinder installation in lower part in place.Again
Top guide cylinder and fastening bolt be successively installed in sequence, and directly or bolt is screwed to specified force by torque extension bar
Square.This scheme for first installing all lower part guide cylinders, can to working space and personnel there is no mounted top guide cylinder
Up to the limitation of property, however this lower part guide cylinder mounting process is asynchronous there are bolt tool operation or force unevenness causes
Lower part guide cylinder supporting pin presses inclined or over worn possibility, and operation difficulty is higher, and exists and damage original threaded hole screw thread
Risk.
2. Demolition Scheme:
According to the scheme that certain well-known presurized water reactor design side, foreign countries provides, guide cylinder is acted directly on using special hanger hook
On interior control rod guiding snap-gauge, upward pulling force is applied for supporting pin directly from upper reactor core to lower part guide cylinder using chain block
It is pulled out in plate pin hole.This scheme is no doubt simple, however this dismounting technology stability and controllability are poor, and all pulling force
It acts directly on the guiding snap-gauge in guide cylinder, may cause deformed damaged.
In view of actual conditions, after manufactory's assembling or during in-site installation, debugging, it is understood that there may be only dismount a certain group or
The demand of several groups of upper and lower part guide cylinders, such as: certain group is replaced in the unqualified needs adjustment of guide cylinder acceptance test after manufactory's assembling
Guide cylinder, or due to first heap Flow vibration test (abbreviation CVAP) etc. other debugging test instrument installation requirements or in-site installation,
Guide cylinder pulls and pushes power test other reasons such as unqualified and results in the need for adjusting or replacing certain group guide cylinder during debugging.And top
Other components (instrument screen work component in such as heap) may be already equipped with around in-pile component guide cylinder.At this time such as according to above-mentioned system
Make factory's technique, there are operating space is limited and the problems such as personnel are unreachable at upper support board.
It to meet the demand, needs to invent a kind of upper-part in-reactor component guide cylinder demolition, installation technique, cooperates related tool,
Reliably tearing open for designated position guide cylinder is completed in the case where upper-part in-reactor component upper and lower part guide cylinder is all installed to realize
Dress.
Summary of the invention
It is an object of the invention to limit for physical condition, a kind of work of upper-part in-reactor component guide cylinder dismounting is provided
Skill, by being used cooperatively for related tool, the dismounting of reliable, stable realization upper-part in-reactor component designated position guide cylinder.
The present invention is implemented as follows:
A kind of supporting pin ejection tool: mainly by a support base, a root thickness tooth screw rod, a top plate and two mandrils
Equal components composition.Tapped through-hole, is engaged with screw rod on support base upper plate, and the plane with spanner cooperation is machined on screw rod
Or turret head, for screwing, two mandrils pass through support base upper plate and top plate and are fixed on top plate by intermediate thread, nut
On.By screwing screw rod, top plate and two mandrils are fed up, upward push away can be applied to lower part guide cylinder supporting pin
Power.
A kind of supporting pin pressing in tool: mainly by two pulling claws, two pull rods, a pulling plate plate, a root thickness tooth screw rod, one
The composition such as a limit plate.Pulling claw profile is respectively according to lower part guide cylinder flange in the bottom (avoiding supporting pin fixture nut) and reactor core instrument
Table support column bottom support bracket shape is designed processing, and two pull rod upper and lower ends are threaded respectively through nut and pulling claw
And pulling plate is fixed, centre pass through limit plate, limit board ends machined the certain guiding unthreaded hole of two spacing, to two pull rods into
Row guiding, position-limiting action；Add tapped through-hole among pulling plate, is engaged with screw rod.By screwing screw rod, make pulling plate and two laybacks
Bar, pulling claw are fed down, and can apply downward pressure to lower part guide cylinder lower flange, and supporting pin is pressed into upper core plate pin
Hole.
A kind of guide cylinder lifting device: mainly by hanging ring, outer sleeve, operation handle and promotion core bar (protection hoist hook
Pawl) etc. composition.Moved up and down by operation handle make promoted core bar hook open, closure, by with the control rod in guide cylinder
It is oriented to snap-gauge cooperation, is realized and the reliable chain of guide cylinder and unlock.
A kind of torque extension bar and auxiliary steering tool: torque extension bar tool is used for long distance under the limited situation of operating space
It from bolt torquing operations, is mainly made of both ends adapter head and intermediate extension bar etc., one end is that outer-hexagonal and guide cylinder fasten spiral shell
The cooperation of bolt hexagon socket head, one end and torque spanner cooperate；It assists steering tool to be used for torque extension bar guide and limit, prevents torque
Torque extension bar deflection during application is mainly made of a locking cap and 4 limit sleeves.
A kind of bolt pneumatic gripping tool: it is mainly used in the unreachable situation in operating space crawl installation at a distance or removes
Guide cylinder fastening bolt.
A kind of live dismounting process of upper-part in-reactor component control rod guide tubes and bundles, includes the following steps:
Step 1: guide cylinder fastening bolt is removed:
The guide cylinder that 01. positioning and confirmation need to remove；
02. installs torque extension bar auxiliary steering tool to the top guide cylinder；
03., by auxiliary steering tool positioning, symmetrically unscrews four fastening bolts using torque extension bar and torque spanner,
It removes torque extension bar and assists steering tool；
04. is back-outed the bolt after unscrewing using light-duty long rod tool, and manually or pneumatically pawl tool takes out bolt；
05. pair of bolt is cleaned, is checked, and smears anti-bite dose, so as to subsequent time dress.
Step 2: top guide cylinder is removed:
01. hangs a dynamometer and a chain block between hoist lifting hook and guide cylinder hoisting tool；
02. operation crane makes top guide cylinder lifting device and top guide cylinder centering and keeps orientation consistent, and decline lifts
Tool insertion guide cylinder is until tool is fully seated on the guide cylinder top plate of top；
03. operational guidance cylinder lifting device opens bottom hook to catch and to be oriented to snap-gauge inside guide cylinder, and locks
It is fixed；
04. applies upward power to guide cylinder using chain block, slowly promotes guide cylinder until de- with lower part guide cylinder
From paying attention to monitoring dynamometer load condition, not allow beyond maximum hoist capacity limit value；
05., which continues to use chain block or crane, removes by drop guide cylinder and is transferred to guide cylinder storage rack, operational guidance
Cylinder lifting device, collapses bottom hook to discharge top guide cylinder, and lock；
06. removes lifting device from guide cylinder, and protection suitably fixed to the top guide cylinder being removed.
Step 3: lower part guide cylinder is removed:
01. pair of threaded hole is cleaned, is checked, smears anti-bite dose to guide blot tool screw thread, manually or by guiding
Bolt operational instrument, 180 ° are symmetrically installed two guide blots to lower part guide cylinder upper flange；
02. hangs a dynamometer and a chain block between hoist lifting hook and guide cylinder lifting device；
03. operation crane makes guide cylinder lifting device and lower part guide cylinder centering and keeps orientation consistent, decline lifting device
Insertion guide cylinder is until tool is fully seated on the guide cylinder top plate of lower part；
04. operational guidance cylinder lifting device opens bottom hook to catch and to be oriented to snap-gauge inside the guide cylinder of lower part, and
Locking；
05. applies upward power to guide cylinder using chain block, monitors lifting load by dynamometer, balances and keep
The self weight of lower part guide cylinder；
06. installs supporting pin ejection tool below upper core plate, is oriented to two mandril aligned with lower of ejection tool
Two supporting pins of cylinder rotate jacking screw rod by spanner, slowly by the synchronous ejection of two supporting pins, until completely from upper reactor core
It is detached from plate and (notes: must guarantee ejection tool two mandril uniform forces, synchronizations of jacking up during jacking, while behaviour need to be synchronized
It is that load remains at self weight as chain block.)；
07., which continues to use chain block or crane, removes by drop guide cylinder and is transferred to guide cylinder storage rack, operation upper part
Guide cylinder lifting device collapses bottom hook to discharge lower part guide cylinder, and locks；
08. removes lifting device from guide cylinder, and protection suitably fixed to the lower part guide cylinder being removed；
09. removes two guide blots, carries out cleaning inspection to the threaded hole on upper-part in-reactor component upper support board, and
Anti- foreign matter protection, so as to subsequent time dress.
Step 4: lower part guide cylinder returns dress:
01. confirms and positions corresponding installation site in guide cylinder and the upper-part in-reactor component wait return dress；
02. pair of threaded hole is cleaned, is checked, smears anti-bite dose to guide blot tool screw thread, manually or by guiding
Bolt operational instrument, 180 ° are symmetrically installed two guide blots to the corresponding threaded hole of in-pile component upper support board；
03. hangs a dynamometer and a chain block between hoist lifting hook and guide cylinder lifting device；
04. operation crane makes guide cylinder lifting device and the lower part guide cylinder centering on storage rack and keeps orientation consistent, under
Until tool is fully seated on the guide cylinder top plate of lower part, operational guidance cylinder lifting device makes drop lifting device insertion guide cylinder
Bottom hook opens to catch and to be oriented to snap-gauge inside guide cylinder, and locks；
05., which using crane will drop guide cylinder, slings and is transferred to upper-part in-reactor component and correspond to installation site top, and confirms
Guide cylinder installation position is correct；Decline suspension hook or chain block, until the support pin head part of lower part guide cylinder bottom two falls into pin
Hole simultaneously contacts, and monitoring dynamometer load keeps it in one third self weight, and two guide blots have penetrated lower part guiding at this time
Cylinder upper flange can play guiding, positioning and keep vertical effect；
06. below upper core plate guide cylinder corresponding position install supporting pin pressing in tool, draw two of pressing in tool
Pawl and pull rod in upper core plate discharge orifice or meter support post holes from protruding into and 180 ° symmetrically act on the guiding drum flange of lower parts
Supporting pin fixture nut position is just avoided in surface two sides, and appropriate adjusting yoke length keeps pulling plate horizontal and fixes, and uses spanner
Rotation jackscrew mechanism makes pulling claw uniform stressed and will pull down guide cylinder lower flange, makes the synchronous insertion upper core plate pin hole of supporting pin
Until lower part guide cylinder it is completely in place (note: should make in supporting pin process of press in pressing in tool two sides pulling claw uniform force, two
Side supporting pin is synchronous to be pushed, while needing Synchronous Radio pine chain block that lifting load is made to maintain lower part guide cylinder one third always
Self weight)；
07. loosens chain block, and operational guidance cylinder lifting device collapses bottom hook to discharge lower part guide cylinder,
And it locks；Lifting device is removed from guide cylinder, is hung away.
Step 5: top guide cylinder returns dress:
01. confirms and positions corresponding installation site in top guide cylinder and the upper-part in-reactor component wait return dress；
02. hangs a dynamometer and a chain block between hoist lifting hook and guide cylinder lifting device；
03. operation crane makes guide cylinder lifting device and the top guide cylinder centering on storage rack and keeps orientation consistent, under
Until tool is fully seated on the guide cylinder top plate of top, operational guidance cylinder lifting device makes drop lifting device insertion guide cylinder
Bottom hook opens to catch and to be oriented to snap-gauge inside guide cylinder, and locks；
04., which using crane will drop guide cylinder, slings and is transferred to upper-part in-reactor component and correspond to installation site top, and confirms
Guide cylinder installation position is correct；Decline suspension hook or chain block, until guide cylinder flange in the bottom in top passes through guide blot and complete
Complete in place, monitoring dynamometer lifting load is zero.
05. loosens chain block, and operational guidance cylinder lifting device collapses bottom hook to discharge top guide cylinder,
And it locks；Lifting device is removed from guide cylinder, is hung away.
06. removes two guide blots, so as to subsequent installation fastening bolt.
Step 6: the installation of guide cylinder fastening bolt:
01. confirmation bolt thread cleans, is not damaged, and has smeared anti-bite dose, and confirmation threaded hole cleans, is not damaged；
02. manually or pneumatically pawl tool four fastening bolts are put into upper backup pad bolt hole, and use light-duty stock
Tool manually tightens fastening bolt；
03. installs torque extension bar auxiliary steering tool to the top guide cylinder；
04., by auxiliary steering tool positioning, tightens four fastening spiral shells using torque extension bar and torque spanner as required
Bolt is to providing torque.
Supplementary explanation: guide cylinder lifting device is utilized, guide cylinder demolition, installation are available there are two types of scheme, i.e., upper and lower part is led
It can be separated to cylinder and individually lift (as described above), integral hoisting can also be assemblied together with upper and lower part guide cylinder.It is above-mentioned main
Operating principle and technique may be applicable to two schemes.
The beneficial effects of the present invention are:
During the present invention can effectively realize that compacted clay liners build peace and debugging, upper-part in-reactor component designated position
The scene dismounting of upper and lower part guide cylinder, is different from manufactory's assembling condition and technique, is not assembled all by upper and lower part guide cylinder
Operating space and the limitation of personnel's accessibility after the completion, cooperate the tools such as invented lower part guide cylinder supporting pin ejection, indentation and
Operating procedure, can more reliable, the more stable and accurate dismounting and assembly for realizing supporting pin, and can guarantee that dismounting and is kept away at quality
Exempt from equipment damage.The tool and technique invented are readily applicable to manufactory's equipment assembling stage.The tool and simple process,
Reliably, the set tool or its technological principle may extend to other similar pins, hole elastic conjunction situation, and specific advantage and effect are such as
Under:
Supporting pin ejection tool and technique:
1) lifting device is different to act on guiding snap-gauge inside guide cylinder to apply upward pulling force to lower part guide cylinder straight
The mode for extracting supporting pin is connect, the supporting pin bottom ejection technique and tool taken the present invention is based on device structure have following
Advantage: a) ejection tool directly acts on supporting pin bottom surface, applies thrust to it supporting pin ejection is more directly effective, and compare
Drawing directly up, pushing method are also more stable, controllable；B) guide card stress inside guide cylinder is avoided, its deformation can be evaded
Or damage risk.
2) two mandrils are installed on a top plate, jacking top plate by single screw rod torquing operations may be implemented two tops
Bar synchronization of jacking up facilitates one man operation and the consistency of pin uniform force supported on both sides and jacking can be effectively ensured.
3) two sides mandril is fixed on top plate by screw thread, and in tool installation, adjustable mandril height makes to push up
Plate is horizontal；During supporting pin jacking, partially if there is asynchronous or unilateral top, the screw structure among mandril can be passed through
Carry out unilateral feeding adjustment.
4) two sides mandril bottom polished rod passes through and surveys spacing processing according to lower part guide cylinder supporting pin on support base upper plate
Location hole, ensure that mandril spacing fix and played during jacking mandril guiding, increase the stability of jacking.
5) this screw thread jackscrew mechanism of intermediate screw rod and two sides mandril by screw pitch and screws angle or circle number control,
The amount of feeding is accurate, controllable, it can be achieved that supporting pin smoothly ejects.
6) big for supporting pin assembly magnitude of interference, tool design calculating fully meets intensity requirement；And pass through wire rod thread
Engagement design, which calculates, can be converted to screw rod torque top lift suffered by supporting pin, suffered top when to control supporting pin ejection
Lift.
Supporting pin pressing in tool and technique:
1) it is different from manufactory and applies stressed mode at the top of the guide cylinder of lower part by the original threaded hole of apparatus body, this
The bottom pressing in tool and technique that invention is taken based on device structure, which have the advantage that, a) may be implemented to build peace and debugging rank
Section, under conditions of upper-part in-reactor component upper and lower part guide cylinder is all installed, any dismounting for formulating position guide cylinder, not by
Operating space and accessibility limitation, or avoid removing more guide cylinders to meet operating space and personnel's accessibility；B) in heap
Component is as nuclear leve key equipment, once damaging, the process and technique of reparation will answer guide cylinder fastening bolt screw hole screw thread very much
It is miscellaneous, and bottom indentation technique, it is fixed in the non-cooperation plane of lower part guide cylinder lower flange by pulling claw, and act directly on two sides
Near supporting pin, ontology threaded hole damage risk is evaded completely, and power transmitting is more direct, process of press in guide cylinder is not easy to incline
Tiltedly, supporting pin indentation is more effectively and steady.
2) two pull rods and pulling claw are installed on a pulling plate, jacking pulling plate downwards by single screw rod torquing operations can be with
It realizes the synchronous drop-down of two lateral bracing struts, facilitates one man operation and lower part guide cylinder lower flange two sides uniform force and branch can be effectively ensured
The consistency of support pin indentation.
3) two lateral bracing strut bottoms are connect by screw thread with pulling plate, and in tool installation, adjustable rod length makes pulling plate
It is horizontal；In supporting pin process of press in, partially if there is asynchronous or unilateral top, can by the screw structure of pull rod bottom into
The unilateral feeding adjustment of row.
4) two lateral bracing strut bottom screw sections are fixed by the screw hole certain with pulling plate spacing, and light bar segment passes through limit among pull rod
Position plate two sides with spacing pilot hole, in addition support base outer dimension of the fixed pulling claw in top according to two sides meter support column
With processing, in this way by limiting measure at upper, middle and lower three, pulling claw caused by the sliding of tool stress can be effectively prevented or deform
It slips, guarantees the stability of tool operation and supporting pin indentation.
5) this screw thread jackscrew mechanism of intermediate screw rod and two lateral bracing struts by screw pitch and screws angle or circle number control,
Feeding is accurate, it is controllable, it can be achieved that supporting pin slowly, smoothly indentation, be completely suitable for guide cylinder and return CVAP instrument during dress
And conducting wire is synchronous installation situation (gap is minimum, about 1~2mm), and can effectively evade and collide with or squeeze caused damage risk.
Big for supporting pin assembly magnitude of interference, tool design calculating fully meets intensity requirement；And matched by wire rod thread
Screw rod torque can be converted to pressure suffered by supporting pin by closing design calculating, suffered pressure when to control supporting pin indentation.
Detailed description of the invention
Fig. 1: the installation of upper and lower part guide cylinder and fastening bolt dismantling device schematic diagram；
Fig. 2: lower part guide cylinder supporting pin ejects schematic diagram；
Fig. 3: lower part guide cylinder supporting pin is pressed into schematic diagram；
Fig. 4: guide cylinder (M-12, N-11) supporting pin in lower part is pressed into schematic diagram (cross sectional plan view)；
Fig. 5: guide cylinder lifting schematic diagram.
In figure: 1, top guide cylinder；2, lower part guide cylinder；3, upper support board；4, upper core plate；5, spacer flanger fastens
Bolt × 4；6, supporting pin × 2；7, lower part guide cylinder lower flange；8, mandril；9, top plate；10, coarse thread screw rod；11, support base
Upper plate；12, support base；13, upper core plate discharge orifice；14, pulling claw；15, pull rod；16, limit plate；17, coarse thread screw rod；18,
Pulling plate；19, control rod is oriented to snap-gauge；20, suspension hook；21, chain block；22, dynamometer；23, guide cylinder lifting device；24, it grasps
Make handle；25, core bar is promoted；26, hook is promoted；27, in-pile instrument support column；28, torque extension bar tool；29, auxiliary is led
To tool；30, torque spanner.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
As shown in Fig. 2, a kind of supporting pin ejection tool is mainly by a support base, a root thickness tooth screw rod, a top plate
It is formed with components such as two mandrils.Tapped through-hole, is engaged with screw rod on support base upper plate, is machined on screw rod and spanner
For screwing, two mandrils pass through support base upper plate and top plate and pass through intermediate thread, nut the plane or turret head of cooperation
It is fixed on top plate.By screwing screw rod, top plate and two mandrils are fed up, lower part guide cylinder supporting pin can be applied
Upward thrust.
As shown in Figure 3,4, a kind of supporting pin pressing in tool is mainly by two pulling claws, two pull rods, a pulling plate plate, one
The composition such as coarse thread screw rod, a limit plate.Pulling claw profile is respectively according to lower part guide cylinder flange in the bottom and in-pile instrument support column
Bottom support bracket shape is designed processing, and two pull rod upper and lower ends are threaded solid by nut and pulling claw and pulling plate respectively
Fixed, centre passes through limit plate, and limit board ends machined the certain guiding unthreaded hole of two spacing, two pull rods are oriented to,
Position-limiting action；Add tapped through-hole among pulling plate, is engaged with screw rod.By screwing screw rod, make pulling plate and two lateral bracing struts, pulling claw
It feeds down, downward pressure can be applied to lower part guide cylinder lower flange, supporting pin is pressed into upper core plate pin hole.
A kind of live dismounting process of upper-part in-reactor component control rod guide tubes and bundles is (as shown in figure 4, with reactor core number N-11
For upper and lower part guide cylinder is removed), include the following steps:
Step 1: guide cylinder fastening bolt 5 is removed:
The guide cylinder that 01. positioning and confirmation need to remove, reactor core number is N-11；
02. will be at the top of the auxiliary installation to the top N-11 guide cylinder of steering tool 29 of torque extension bar；
03. positions by auxiliary steering tool 29, symmetrically unscrews four tightly using torque extension bar 28 and torque spanner 30
Fixing bolt 5 removes torque extension bar and assists steering tool 29；
04. will be unscrewed using light-duty long rod tool after bolt 5 back-out, and manually or pneumatically pawl tool takes out bolt 5；
05. pair of bolt 5 is cleaned, is checked, and smears anti-bite dose, so as to subsequent time dress.
Step 2: top guide cylinder 1 is removed:
01. hangs a dynamometer 22 and a chain block 21 between hoist lifting hook 20 and guide cylinder lifting device 23；
02. operation crane makes top guide cylinder lifting device 23 and 1 centering of top guide cylinder and keeps orientation consistent, and decline is hung
Holding tool insertion guide cylinder is until tool is fully seated on the guide cylinder top plate of top；
The operation handle 24 of 03. operational guidance cylinder lifting device opens bottom hook 26 to catch inside guide cylinder
It is oriented to snap-gauge 19, and is locked；
04. applies upward power to guide cylinder using chain block 21, slowly promotes top guide cylinder 1 until and lower guide
It is detached to cylinder 2, pays attention to monitoring dynamometer load condition, not allow beyond maximum hoist capacity limit value；
05., which continues to use chain block 21 or crane, removes by drop guide cylinder and is transferred to guide cylinder storage rack, and operation is led
It to cylinder lifting device 23, collapses bottom hook 26 to discharge top guide cylinder, and locks；
06. removes lifting device 23 from guide cylinder, and protection suitably fixed to the top guide cylinder being removed.
Step 3: lower part guide cylinder 2 is removed:
01. pair of threaded hole is cleaned, is checked, smears anti-bite dose to guide blot tool screw thread, manually or by guiding
Bolt operational instrument, 180 ° are symmetrically installed two guide blots into 3 threaded hole of lower part guide cylinder upper flange and upper support board；
02. between hoist lifting hook 20 and guide cylinder lifting device 23 as shown in figure 5, hang a dynamometer 22 and one
Chain block 21；
03. operation crane makes guide cylinder lifting device 23 and lower part guide cylinder centering and keeps orientation consistent, decline slinger
23 insertion guide cylinder of tool is until tool is fully seated on the guide cylinder top plate of lower part；
The operation handle 24 of 04. operational guidance cylinder lifting device opens bottom hook 26 to catch lower part guide cylinder
Inside guiding snap-gauge 19, and lock；
05. applies upward power to guide cylinder using chain block 21, monitors lifting load by dynamometer 22, balance is simultaneously
Keep the self weight of lower part guide cylinder；
06. installs supporting pin ejection tool below upper core plate 4, leads two 8 aligned with lower of mandril of ejection tool
To two supporting pins 6 of cylinder, jacking screw rod 10 is rotated by spanner, slowly by the synchronous ejection of two supporting pins 6, until completely from
It is detached from upper core plate 4 and (notes: must guarantee ejection tool two 8 uniform forces of mandril, synchronizations of jacking up during jacking, simultaneously
Need simultaneously operating chain block 21 that load is made to remain at the self weight of lower part guide cylinder.)；
07., which continues to use chain block 21 or crane, will drop guide cylinder and remove and be transferred to guide cylinder storage rack, in operation
Portion's guide cylinder lifting device 23 collapses bottom hook 26 to discharge lower part guide cylinder, and locks；
08. removes lifting device 23 from guide cylinder, and protection suitably fixed to the lower part guide cylinder being removed；
09. removes two guide blots, carries out cleaning inspection to the threaded hole on upper-part in-reactor component upper support board 3,
And anti-foreign matter protection, so as to subsequent time dress.
Step 4: lower part guide cylinder 2 returns dress:
01. confirms and positions corresponding installation site in guide cylinder and the upper-part in-reactor component wait return dress, and reactor core number is
N-11；
02. pair of threaded hole is cleaned, is checked, smears anti-bite dose to guide blot tool screw thread, manually or by guiding
Bolt operational instrument, 180 ° are symmetrically installed two guide blots to the corresponding threaded hole of in-pile component upper support board 3；
03. hangs a dynamometer 22 and a chain block 21 between hoist lifting hook 20 and guide cylinder lifting device 23；
04. operation crane makes guide cylinder lifting device 23 and the lower part guide cylinder centering on storage rack and keeps orientation consistent,
Decline lifting device 23 insertion guide cylinder is fully seated on the guide cylinder top plate of lower part up to tool, operational guidance cylinder lifting device
Operation handle 24, open bottom hook 26 to catch and to be oriented to snap-gauge 19 inside guide cylinder, and lock；
05., which using crane will drop guide cylinder, slings and is transferred to upper-part in-reactor component and correspond to installation site top, and confirms
Guide cylinder installation position is correct；Decline suspension hook 20 or chain block 21, until 6 head of supporting pin of lower part guide cylinder bottom two is fallen
Enter pin hole and contact, monitoring 22 load of dynamometer keeps it in one third self weight, and two guide blots penetrate down at this time
Portion's guide cylinder upper flange can play guiding, positioning and keep vertical effect；
06. below upper core plate 4 guide cylinder corresponding position install supporting pin pressing in tool, draw two of pressing in tool
Pawl 14 and pull rod 15 are protruded into from 27 hole of upper core plate discharge orifice 13 or meter support column and 180 ° symmetrically act on lower part guiding
7 upper surface two sides of cylinder lower flange, just avoid 6 fastening nut position of supporting pin, appropriate 15 length of adjusting yoke makes 16 water of pulling plate
It is flat and fixed thereto, make 14 uniform stressed of pulling claw using spanner rotation jackscrew mechanism 17 and guide cylinder lower flange 7 will be pulled down, makes
The pin hole of the synchronous insertion upper core plate 5 of supporting pin 6 is until lower part guide cylinder (notes: answering in 6 process of press in of supporting pin in place completely
Make 14 uniform force of two sides pulling claw, the synchronous pushing of pin supported on both sides 6 of pressing in tool, while Synchronous Radio pine chain block 21 being needed to make
Lifting load maintains the self weight of lower part guide cylinder one third always)；
07. loosens chain block 21, and operational guidance cylinder lifting device 23 collapses bottom hook 26 to discharge lower guide
To cylinder, and lock；Lifting device 23 is removed from guide cylinder, is hung away.
Step 5: top guide cylinder 1 returns dress:
01. confirms and positions corresponding installation site in guide cylinder and the upper-part in-reactor component wait return dress, and reactor core number is
N-11；
02. hangs a dynamometer 22 and a chain block 21 between hoist lifting hook 20 and guide cylinder lifting device 23；
03. operation crane makes guide cylinder lifting device 23 and the top guide cylinder centering on storage rack and keeps orientation consistent,
Decline lifting device 23 insertion guide cylinder is fully seated on the guide cylinder top plate of top up to tool, operational guidance cylinder lifting device
Operation handle 24, open bottom hook 26 to catch and to be oriented to snap-gauge 19 inside guide cylinder, and lock；
04., which using crane will drop guide cylinder, slings and is transferred to upper-part in-reactor component and correspond to installation site top, and confirms
Guide cylinder installation position is correct；Decline suspension hook 20 or chain block 21, until guide cylinder flange in the bottom in top passes through guide blot
And it is completely in place, monitoring dynamometer lifting load is zero.
05. loosens chain block 21, and operational guidance cylinder lifting device 23 collapses bottom hook 26 to discharge upper guide
To cylinder, and lock；Lifting device 23 is removed from guide cylinder, is hung away.
06. removes two guide blots, so as to subsequent installation fastening bolt.
Step 6: guide cylinder fastening bolt 5 is installed:
01. confirmation 5 screw thread of bolt cleans, is not damaged, and has smeared anti-bite dose, and confirmation threaded hole cleans, is not damaged；
02. manually or pneumatically pawl tool four fastening bolts put 5 enter in upper backup pad bolt hole, and use light-duty stock
Tool manually tightens fastening bolt 5；
03. will be at the top of auxiliary steering tool 29 installation to the top guide cylinder of torque extension bar；
04. positions by auxiliary steering tool 29, tightens four as required using torque extension bar 28 and torque spanner 30
Fastening bolt 5 to regulation torque.
Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, should all be in this hair
Within bright protection scope.
Claims (3)
1. a kind of live dismounting process of upper-part in-reactor component control rod guide tubes and bundles, specifically comprises the following steps:
Step 1: guide cylinder fastening bolt (5) is removed:
Step 1.1: the guide cylinder that positioning and confirmation need to remove, reactor core number is N-11；
Step 1.2: at the top of torque extension bar auxiliary steering tool (29) installation to the top N-11 guide cylinder；
Step 1.3: by auxiliary steering tool (29) positioning, symmetrically being unscrewed using torque extension bar (28) and torque spanner (30)
Four fastening bolts (5) remove torque extension bar auxiliary steering tool (29)；
Step 1.4: being back-outed the bolt after unscrewing (5) using light-duty long rod tool, and manually or pneumatically pawl tool takes out bolt
(5)；
Step 1.5: bolt (5) being cleaned, is checked, and smears anti-bite dose, so as to subsequent time dress；
Step 2: top guide cylinder (1) is removed:
Step 2.1: hanging a dynamometer (22) between hoist lifting hook (20) and guide cylinder lifting device (23) and one pulls
Cucurbit (21)；
Step 2.2: operation crane makes top guide cylinder lifting device (23) and (1) centering of top guide cylinder and keeps orientation consistent,
Decline lifting device insertion guide cylinder is until tool is fully seated on the guide cylinder top plate of top；
Step 2.3: the operation handle (24) of operational guidance cylinder lifting device opens bottom hook (26) to catch guide cylinder
Inside guiding snap-gauge (19), and lock；
Step 2.4: apply upward power to guide cylinder using chain block (21), slowly promote top guide cylinder (1) until with
Lower part guide cylinder (2) is detached from, and is paid attention to monitoring dynamometer load condition, not allowed beyond maximum hoist capacity limit value；
Step 2.5: continuing to use chain block (21) or crane for guide cylinder is dropped and remove and be transferred to guide cylinder storage rack, operate
Guide cylinder lifting device (23) collapses bottom hook (26) to discharge top guide cylinder, and locks；
Step 2.6: lifting device (23) being removed from guide cylinder, and protection suitably fixed to the top guide cylinder being removed；
Step 3: lower part guide cylinder (2) is removed:
Step 3.1: threaded hole being cleaned, is checked, anti-bite dose is smeared to guide blot tool screw thread, manually or by guiding
Bolt operational instrument, 180 ° are symmetrically installed two guide blots to lower part guide cylinder upper flange and upper support board (3) threaded hole
In；
Step 3.2: hanging a dynamometer (22) between hoist lifting hook (20) and guide cylinder lifting device (23) and one pulls
Cucurbit (21)；
Step 3.3: operation crane makes guide cylinder lifting device (23) and lower part guide cylinder centering and keeps orientation consistent, and decline lifts
Tool (23) insertion guide cylinder is until tool is fully seated on the guide cylinder top plate of lower part；
Step 3.4: the operation handle (24) of operational guidance cylinder lifting device opens bottom hook (26) to catch lower guide
Snap-gauge (19) are oriented to inside to cylinder, and are locked；
Step 3.5: apply upward power to guide cylinder using chain block (21), monitors lifting load by dynamometer (22),
It balances and lower part guide cylinder is kept to be self-possessed；
Step 3.6: supporting pin ejection tool being installed below upper core plate (4), under being directed at two mandrils (8) of ejection tool
Two supporting pins (6) of portion's guide cylinder rotate jacking screw rod (10) by spanner, two supporting pins (6) are slowly synchronized ejection,
Until being detached from from upper core plate (4) completely；
Step 3.7: continuing to use chain block (21) or crane for guide cylinder is dropped and remove and be transferred to guide cylinder storage rack, operate
Top guide cylinder lifting device (23) collapses bottom hook (26) to discharge lower part guide cylinder, and locks；
Step 3.8: lifting device (23) being removed from guide cylinder, and protection suitably fixed to the lower part guide cylinder being removed；
Step 3.9: removing two guide blots, cleaning inspection is carried out to the threaded hole on upper-part in-reactor component upper support board (3)
It looks into and anti-foreign matter is protected, so as to subsequent time dress；
Step 4: lower part guide cylinder (2) returns dress:
Step 4.1: confirming and position corresponding installation site in guide cylinder and the upper-part in-reactor component wait return dress, reactor core number is
N-11；
Step 4.2: threaded hole being cleaned, is checked, anti-bite dose is smeared to guide blot tool screw thread, manually or by guiding
Bolt operational instrument, 180 ° are symmetrically installed two guide blots to the corresponding threaded hole of in-pile component upper support board (3)；
Step 4.3: hanging a dynamometer (22) between hoist lifting hook (20) and guide cylinder lifting device (23) and one pulls
Cucurbit (21)；
Step 4.4: operation crane makes the lower part guide cylinder centering on guide cylinder lifting device (23) and storage rack and makes orientation one
It causes, until tool is fully seated on the guide cylinder top plate of lower part, operational guidance cylinder is hung decline lifting device (23) insertion guide cylinder
The operation handle (24) of holding tool opens bottom hook (26) and is oriented to snap-gauge (19) inside guide cylinder to catch, and locks；
Step 4.5: guide cylinder will be dropped using crane sling and be transferred to upper-part in-reactor component and correspond to installation site top, and confirm
Guide cylinder installation position is correct；Decline suspension hook (20) or chain block (21), until the supporting pin (6) of lower part guide cylinder bottom two
Head falls into pin hole and contacts, and monitoring dynamometer (22) load keeps it in one third self weight, at this time two guide blots
Lower part guide cylinder upper flange has been penetrated, guiding, positioning can be played and has kept vertical effect；
Step 4.6: guide cylinder corresponding position installs supporting pin pressing in tool below upper core plate (4), makes the two of pressing in tool
A pulling claw (14) and pull rod (15) are protruded into from upper core plate discharge orifice (13) or meter support column (27) hole and 180 ° to referred to as
Used in lower part guide cylinder lower flange (7) upper surface two sides, supporting pin (6) fastening nut position, appropriate adjusting yoke are just avoided
(15) length keeps pulling plate (16) horizontal and fixed thereto, makes pulling claw (14) uniform stressed simultaneously using spanner rotation jackscrew mechanism (17)
Guide cylinder lower flange (7) will be pulled down, make the pin hole of supporting pin (6) synchronous insertion upper core plate (5) until lower part guide cylinder is complete
It is complete in place；
Step 4.7: loosening chain block (21), operational guidance cylinder lifting device (23), collapse bottom hook (26) to release
Portion's guide cylinder is put down, and is locked；Lifting device (23) is removed from guide cylinder, is hung away；
Step 5: top guide cylinder (1) returns dress:
Step 5.1: confirming and position corresponding installation site in guide cylinder and the upper-part in-reactor component wait return dress, reactor core number is
N-11；
Step 5.2: hanging a dynamometer (22) between hoist lifting hook (20) and guide cylinder lifting device (23) and one pulls
Cucurbit (21)；
Step 5.3: operation crane makes the top guide cylinder centering on guide cylinder lifting device (23) and storage rack and makes orientation one
It causes, until tool is fully seated on the guide cylinder top plate of top, operational guidance cylinder is hung decline lifting device (23) insertion guide cylinder
The operation handle (24) of holding tool opens bottom hook (26) and is oriented to snap-gauge (19) inside guide cylinder to catch, and locks；
Step 5.4: guide cylinder will be dropped using crane sling and be transferred to upper-part in-reactor component and correspond to installation site top, and confirm
Guide cylinder installation position is correct；Decline suspension hook (20) or chain block (21), until guide cylinder flange in the bottom in top passes through guiding
Bolt is simultaneously completely in place, and monitoring dynamometer lifting load is zero；
Step 5.5: loosening chain block (21), operational guidance cylinder lifting device (23), collapse bottom hook (26) to release
Portion's guide cylinder is put, and is locked；Lifting device (23) is removed from guide cylinder, is hung away；
Step 5.6: two guide blots are removed, so as to subsequent installation fastening bolt；
Step 6: guide cylinder fastening bolt (5) installation:
Step 6.1: confirmation bolt (5) screw thread cleans, is not damaged, and has smeared anti-bite dose, and confirmation threaded hole cleans, is not damaged；
Step 6.2: manually or pneumatically four fastening bolts are put (5) and are entered in upper backup pad bolt hole by pawl tool, and using light-duty
Long rod tool manually tightens fastening bolt (5)；
Step 6.3: at the top of torque extension bar auxiliary steering tool (29) installation to the top guide cylinder；
Step 6.4: by auxiliary steering tool (29) positioning, being twisted as required using torque extension bar (28) and torque spanner (30)
Tight four fastening bolts (5) extremely regulation torque.
2. the live dismounting process of upper-part in-reactor component control rod guide tubes and bundles according to claim 1, it is characterised in that: institute
The step 3.6 stated must guarantee ejection tool two mandril (8) uniform forces, synchronizations of jacking up, while need to synchronize behaviour during jacking
Make the self weight that chain block (21) makes load remain at lower part guide cylinder.
3. the live dismounting process of upper-part in-reactor component control rod guide tubes and bundles according to claim 1, it is characterised in that: institute
The step 4.6 stated should make two sides pulling claw (14) uniform force of pressing in tool, pin supported on both sides in supporting pin (6) process of press in
(6) synchronous to push, while needing Synchronous Radio pine chain block (21) that lifting load is made to maintain lower part guide cylinder one third always
Self weight.
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| CN201711464974.5A CN109968275B (en) | 2017-12-28 | 2017-12-28 | On-site dismounting process for upper reactor internals control rod guide cylinder |
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| CN201711464974.5A CN109968275B (en) | 2017-12-28 | 2017-12-28 | On-site dismounting process for upper reactor internals control rod guide cylinder |
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| CN112037952A (en) * | 2020-05-18 | 2020-12-04 | 中国核工业第五建设有限公司 | Method for installing and dismantling in-reactor component current limiter of AP1000 reactor type nuclear power station |
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| CN115938626A (en) * | 2023-03-14 | 2023-04-07 | 福建福清核电有限公司 | Detachable reactor in-reactor component lifting appliance guide post |
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