CN208061675U - A kind of nuclear fuel channel sealing-plug special fixture - Google Patents
A kind of nuclear fuel channel sealing-plug special fixture Download PDFInfo
- Publication number
- CN208061675U CN208061675U CN201820208371.2U CN201820208371U CN208061675U CN 208061675 U CN208061675 U CN 208061675U CN 201820208371 U CN201820208371 U CN 201820208371U CN 208061675 U CN208061675 U CN 208061675U
- Authority
- CN
- China
- Prior art keywords
- sealing
- plug
- staving
- nuclear fuel
- fuel channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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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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- Gasket Seals (AREA)
Abstract
The utility model discloses a kind of nuclear fuel channel sealing-plug special fixtures, it include staving, the both sides of staving are respectively equipped with the side shield being fixed on barrel wall, axial compression bar for compressing sealing-plug bottom is installed on side shield, the pin hole being oppositely arranged there are two being set on staving, pin hole is located on the bucket wall between two side shields, pin is inserted in pin hole respectively, it is fixedly connected with square block below barrel soleplate, square block is equipped with the threaded hole through barrel soleplate, threaded post is installed in threaded hole, the upper end of threaded post is fixedly connected with pallet, the lower end of threaded post is fixedly connected with moving block, pallet is located above barrel soleplate and coaxial with staving.The nuclear fuel channel sealing-plug special fixture of the utility model can be effectively protected sealing-plug formation disassembling the when of overhauling; it prevents foreign object from colliding with and damages sealing-plug; sealing-plug dismantling when inside spring will not fiercely pop up; improve sealing-plug dismantling and security performance when assembled, operation convenient to overhaul.
Description
Technical field
The utility model is related to nuclear fuel channel repair apparatus fields, and in particular to a kind of nuclear fuel channel sealing-plug is special
Fixture.
Background technology
Three factory of Qinshan Phase II NPP is national unique heavy water heap-type nuclear power station, and type of reactor is different from other conventional presurized water reactors
Heap-type, the sealing of nuclear fuel channel end surface are sealed by sealing-plug, and end face seal plug environment temperature is up to 700 during day-to-day operation
DEG C, the availability of sealing-plug directly affects the normal operation of reactor, so filling in capable inspection to replaced faulty seal
It repaiies very strict.The upper end stainless steel parts of sealing-plug are seal disc, primarily serve sealing function, and outer ring projection portion is close
Cover is the position for needing protection emphatically；Intermediate four claws can freely stretch, and play sealing-plug being fixed on fuel channel
Interior effect；Sealing-plug top and the bottom are connected by four core grade bolts, and inside has four springs to control the flexible of claw；Sealing-plug
Body outer surface is nitriding layer, plays the anti-function of getting rusty of anticorrosion, prevents from generating foreign matter inside fuel channel.Nuclear fuel channel
Periodic inspection, sealing-plug needs is needed to disassemble and disassemble maintenance, the maintenance of sealing-plug in the prior art is direct by vice
Sealing-plug ontology is pressed from both sides, using spanner disintegration sealing-plug, the risk brought in this way is：1, vice folder, which obtains, is tightly easily destroyed very much sealing-plug
Nitriding layer, hold too loose bolt and be not easy to lift down；2, it is easy to bump to the close of seal disc during vice folder sealing-plug
Cover, due to the demanding specifications of nuclear technology field, sealing surface has to the sealing-plug more renewed once impaired；3, it assembles
There are four springs when sealing-plug, between upper-lower casing, it is necessary to equipment be put into both hands on ground and firmly push four bolts of shell
Button can be entered, seriously made troubles to work in this way；4, sealing-plug assembling process also wants Reusability vice, it is easy to cause to close
The damage of blocking.
Invention content
For problems of the prior art, the utility model is by plugging sealing when disassembling and assembling sealing-plug
In in the staving that one can protect sealing-plug nitriding layer, staving can be fixed by tool, pass through the pallet support in staving
The firmly seal disc of sealing-plug compresses sealing-plug bottom fixing seal plug, to provide one kind using the axial compression bar of adjustable up-down
Can safe and effective fixed nuclear fuel channel sealing-plug, facilitate sealing-plug dismounting maintenance nuclear fuel channel sealing-plug it is special
Use fixture.
To achieve the above object, the technical solution adopted in the utility model is：A kind of nuclear fuel channel sealing-plug exclusive clamps
Tool, includes the staving being made of bucket wall and barrel soleplate, the both sides of staving are respectively equipped with the side shield being fixed on barrel wall, side block
Axial compression bar for compressing sealing-plug bottom is installed on plate, is set on staving there are two the pin hole being oppositely arranged, pin hole is distinguished
On bucket wall between two side shields, pin is inserted in pin hole respectively, square block is fixedly connected with below barrel soleplate, it is rectangular
Block is equipped with the threaded hole through barrel soleplate, is equipped with threaded post in threaded hole, the upper end of threaded post is fixedly connected with pallet, spiral shell
The lower end of line column is fixedly connected with the moving block for being useful for that threaded post is driven to rotate together, and pallet is located above barrel soleplate and and staving
Coaxially.
Side shield has the medial surface that same curved surface is in the inner wall of bucket wall.
The upper end of side shield is picked up the ears towards vertical side bending formation outside staving, is picked up the ears equipped with through-hole, and being inserted in through-hole can be
The upper end of up and down threaded rod in through-hole, threaded rod forms axial compression bar towards bending on the inside of staving, is equipped on threaded rod
Nut, nut are located at lower section of picking up the ears.
Moving block is hexagonal prisms.
Pallet is circle, and the diameter of pallet is less than the sealing linear diameter of the seal disc of sealing-plug.
The diameter of pallet is equal with the diameter of threaded post.
There is the inner wall of bucket wall wide diameter portion, the diameter of wide diameter portion to be more than bucket wall inner diameter, and wide diameter portion expands close to barrel soleplate
The height in diameter portion is more than the thickness of the seal disc of sealing-plug.
The outer wall of bucket wall is set there are two convex block, and two pin holes are located on two convex blocks.
The utility model has the beneficial effects that：The nuclear fuel channel sealing-plug special fixture of the utility model can seal
Sealing-plug formation is effectively protected when plug dismantling maintenance, prevents service kit etc. from bumping to sealing-plug, sealing-plug is in dismantling
Internal spring will not be popped up fiercely, effectively raise sealing-plug dismantling and security performance when assembled, worker convenient to overhaul
Operation.
Description of the drawings
Fig. 1 is the stereogram of the utility model；
Fig. 2 is the schematic cross-section of the utility model.
Specific implementation mode
In conjunction with attached drawing, the utility model is described in further detail.
As shown in Figs. 1-2, a kind of nuclear fuel channel sealing-plug special fixture, includes to be made of bucket wall 1 and barrel soleplate 2
Staving 3, the both sides of staving 3 are respectively equipped with the side shield 4 being fixed on barrel wall 1, are equipped on side shield 4 for compressing sealing-plug
The axial compression bar 5 of bottom is set on staving 3 there are two the pin hole 6 being oppositely arranged, and pin hole 6 is located between two side shields 4
On bucket wall 1, pin is inserted in pin hole 6 respectively, 2 lower section of barrel soleplate is fixedly connected with square block 7, and square block 7, which is equipped with, runs through bucket
The threaded hole 8 of bottom plate is equipped with threaded post 9 in threaded hole 8, and the upper end of threaded post 9 is fixedly connected with pallet 10, threaded post 9
Lower end is fixedly connected with the moving block 11 for being useful for that threaded post 9 is driven to rotate together, and pallet 10 is located at 2 top of barrel soleplate and and staving
3 is coaxial.Sealing-plug is put into staving 3 when use, pallet 10 holds the seal disc of sealing-plug, and screw thread is driven by moving block 11
Column 9 rotates, so as to adjust 10 height of pallet so that two pin holes 6 on staving 3 are respectively aligned to the fixed pin of sealing-plug, in pin
Insertion pin in hole 6, pin are inserted by pin hole 6 in the counterbore of sealing-plug fixed pin, to fixing seal plug so that close
Blocking will not rotate in staving.Sealing-plug is compressed using axial compression bar 5 so that sealing-plug is fixed in staving 3.Dismantling sealing
The fixed pin in sealing-plug is ejected from another pin hole 6 by pin hole 6 using pin when plug, due under axial compression bar 5
Pressure acts on, and the spring inside sealing-plug will not be popped up fiercely, then the axial compression bar 5 that comes up, by the upper-lower casing of sealing-plug point
From the spring stress in sealing-plug is slowly eliminated, to easily disassemble sealing-plug.Square block 7 is integrally formed with staving, rectangular
Block 7 fixes staving for vice easy to use.
Side shield 4 has the medial surface that same curved surface is in the inner wall of bucket wall 1, and side shield 4 can be to the upper of sealing-plug
Partial shell is protected.
The upper end of side shield 4 picks up the ears 12 towards 3 outside vertical bending of staving formation, picks up the ears 12 to be equipped with through-hole 13, through-hole 13
In be inserted with can up and down threaded rod 14 in through-holes, the upper end of threaded rod 14 forms axial compression bar towards 3 inside bending of staving
5, nut 15 is installed, nut 15 is located at 12 lower sections of picking up the ears on threaded rod 14.Sealing-plug is put into staving, the sealing of sealing-plug
Disk is placed on pallet 10, rotates threaded rod 14, and axial compression bar 5 is rotated to the top of sealing-plug and whereabouts is pressed in sealing-plug naturally
On, by rotating screw cap 15, threaded rod 14 moves down so that axial compression bar 14 generates downward lower pressure, so that sealing-plug
It is pressed in staving 3, sealing-plug will not move in the axial direction.When assembling sealing-plug, while two nuts 15 are rotated,
Two axial compression bars 5 while uniform descent compress the upper cover body of sealing-plug so that the bolt and spring stress in sealing-plug are uniform.
Moving block 11 is hexagonal prisms, the turns moving blocks 11 such as die nut easy to use, pliers, ratchet spanner.
Pallet 10 is circle, and the diameter of pallet 10 is less than the sealing linear diameter of the seal disc of sealing-plug.Pallet 10 and sealing
The base surface of seal disc is filled at the center of seal disc, is not contacted with the sealing surface of seal disc surrounding, ensures that sealing surface is in hanging
State will not be arrived by 3 scraping collision of staving.
The diameter of pallet 10 is equal with the diameter of threaded post 9, and pallet 10 is not susceptible to shake when rotating moving block 11, seals
The sealing surface of disk will not be bumped to by bucket wall 1.
The outer wall of bucket wall 1 is set there are two convex block 16, and a pin hole 6 is located in one of on convex block 16, installs or disassemble and is close
It is needed when the fixed pin of blocking with larger power, convex block 16 can reinforce 1 structural strength of bucket wall near pin hole 6.
There is the inner wall of bucket wall 1 wide diameter portion 17, the diameter of wide diameter portion 17 to be more than 1 inner diameter of bucket wall, and wide diameter portion is close to bucket
Bottom plate 2, the height of wide diameter portion 17 are more than the thickness of the seal disc of sealing-plug.Pallet when rotating 11 10 height of adjusting tray of moving block
10 can occur weak vibrations, and wide diameter portion 17 can occur when following pallet 10 to move on pallet 10 with bucket wall 1 to avoid seal disc
It collides with.
The preferred embodiment of the utility model described in detail above, it should be understood that the ordinary skill people of this field
Member according to the present utility model can conceive without creative work makes many modifications and variations, therefore, all this technology necks
Technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to the design of the utility model in domain
Available technical solution is tested, it all should be in the protection domain being defined in the patent claims.
Claims (8)
1. a kind of nuclear fuel channel sealing-plug special fixture, which is characterized in that include the staving being made of bucket wall and barrel soleplate,
The both sides of staving are respectively equipped with the side shield being fixed on barrel wall, and the axial direction for compressing sealing-plug bottom is equipped on side shield
Compression bar is set on staving there are two the pin hole being oppositely arranged, and pin hole is located on the bucket wall between two side shields, in pin hole point
It is not inserted with pin, is fixedly connected with square block below barrel soleplate, square block is equipped with the threaded hole through barrel soleplate, in threaded hole
Threaded post is installed, the upper end of threaded post is fixedly connected with pallet, and the lower end of threaded post, which is fixedly connected, to be useful for driving threaded post
The moving block rotated together, pallet are located above barrel soleplate and coaxial with staving.
2. nuclear fuel channel sealing-plug special fixture as described in claim 1, which is characterized in that the side shield has and bucket
The inner wall of wall is in the medial surface of same curved surface.
3. nuclear fuel channel sealing-plug special fixture as described in claim 1, which is characterized in that the upper end court of the side shield
The outer vertical side bending formation of staving is picked up the ears, and is picked up the ears equipped with through-hole, be inserted in through-hole can up and down threaded rod in through-holes,
The upper end of threaded rod forms axial compression bar towards bending on the inside of staving, and nut is equipped on threaded rod, and nut is located at lower section of picking up the ears.
4. nuclear fuel channel sealing-plug special fixture as described in claim 1, which is characterized in that the moving block is six ribs
Column.
5. nuclear fuel channel sealing-plug special fixture as described in claim 1, which is characterized in that the pallet is circle, support
The diameter of disk is less than the sealing linear diameter of the seal disc of sealing-plug.
6. nuclear fuel channel sealing-plug special fixture as claimed in claim 5, which is characterized in that the diameter and spiral shell of the pallet
The diameter of line column is equal.
7. nuclear fuel channel sealing-plug special fixture as described in claim 1, which is characterized in that the inner wall of the bucket wall has
The diameter of wide diameter portion, wide diameter portion is more than bucket wall inner diameter, and wide diameter portion is more than sealing-plug close to barrel soleplate, the height of wide diameter portion
The thickness of seal disc.
8. nuclear fuel channel sealing-plug special fixture as described in claim 1, which is characterized in that the outer wall of the bucket wall is equipped with
Two convex blocks, two pin holes are located on two convex blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820208371.2U CN208061675U (en) | 2018-02-06 | 2018-02-06 | A kind of nuclear fuel channel sealing-plug special fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820208371.2U CN208061675U (en) | 2018-02-06 | 2018-02-06 | A kind of nuclear fuel channel sealing-plug special fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208061675U true CN208061675U (en) | 2018-11-06 |
Family
ID=63994081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820208371.2U Expired - Fee Related CN208061675U (en) | 2018-02-06 | 2018-02-06 | A kind of nuclear fuel channel sealing-plug special fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208061675U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108133762A (en) * | 2018-02-06 | 2018-06-08 | 浙江万纳核电检修有限公司 | A kind of nuclear fuel channel sealing-plug special fixture |
-
2018
- 2018-02-06 CN CN201820208371.2U patent/CN208061675U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108133762A (en) * | 2018-02-06 | 2018-06-08 | 浙江万纳核电检修有限公司 | A kind of nuclear fuel channel sealing-plug special fixture |
| CN108133762B (en) * | 2018-02-06 | 2024-03-19 | 浙江万纳核电检修有限公司 | Special fixture for sealing plug of nuclear fuel channel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181106 Termination date: 20220206 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |