CN111354481A - Device for unlocking control rod driving rod - Google Patents
Device for unlocking control rod driving rod Download PDFInfo
- Publication number
- CN111354481A CN111354481A CN201811574399.9A CN201811574399A CN111354481A CN 111354481 A CN111354481 A CN 111354481A CN 201811574399 A CN201811574399 A CN 201811574399A CN 111354481 A CN111354481 A CN 111354481A
- Authority
- CN
- China
- Prior art keywords
- gripper
- sliding sleeve
- rod
- driving
- driving head
- 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.)
- Pending
Links
- 238000009434 installation Methods 0.000 claims description 12
- 210000000078 claw Anatomy 0.000 claims description 7
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
- G21C7/12—Means for moving control elements to desired position
- G21C7/16—Hydraulic or pneumatic drive
-
- 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
Abstract
The invention relates to the technical field of nuclear power overhaul, and particularly discloses a device for unlocking a control rod drive rod. The device comprises a main cylinder, an auxiliary cylinder, a driving head, an inner sliding sleeve and a mounting seat, wherein a piston motion shaft at the lower end of the main cylinder is connected with the driving head and drives the driving head to move up and down; the mounting seat and the auxiliary cylinder are mounted on the flange plate, and the clamping jaws on the mounting seat can be controlled to open or contract through the auxiliary cylinder, so that the grabbing control of the groove part on the outer wall of the driving rod is realized; an inner sliding sleeve is arranged in the mounting seat, an inserting piece and a gripper are arranged on the inner sliding sleeve, the inserting piece can open a C-shaped clamping ring in the driving rod, and the driving head moves up and down to control and grip or release the gripping head of the driving rod. The device has simple and reliable structure, and can realize the unlocking and the connection of the control rod drive rod and the control rod assembly at a long distance; meanwhile, the unlocking condition of the driving rod and the control rod can be displayed through the position device of the indicating rod.
Description
Technical Field
The invention belongs to the technical field of nuclear power overhaul, and particularly relates to a device for unlocking a control rod drive rod.
Background
After the top cover of the reactor pressure vessel is removed, a special tool is used for disconnecting the control rod driving rod and the control rod assembly group by group so as to prepare for removing the upper reactor internals; after reinstalling the upper internals, the tool is also used to connect the drive rod and control rod assembly together in preparation for the containment of the reactor; the structure of the driven rod which is the operated object is shown in figure 1: the upper part of the dismounting rod is provided with a grabbing head which is connected with the bottom plug head through the dismounting rod, the detachable joint is locked at an opening position under the action of a spring, and when the grabbing head is grabbed and the dismounting rod is lifted, the plug head is lifted, so that the connection with the control rod assembly can be disconnected. A C-shaped snap ring is arranged at the top of the driving rod and can limit the gripping head to move upwards, and only when the C-shaped snap ring is expanded, the gripping head can be lifted and the driving rod and the control rod assembly are unlocked.
Disclosure of Invention
The invention aims to provide a device for unlocking a control rod driving rod, which can remotely unlock and connect the control rod driving rod and a control rod.
The technical scheme of the invention is as follows: a device for unlocking a control rod driving rod comprises a main cylinder, an auxiliary cylinder, a driving head, an inner sliding sleeve and a mounting seat, wherein a piston motion shaft at the lower end of the main cylinder is connected with the driving head and drives the driving head to move up and down; the mounting seat and the auxiliary cylinder are mounted on the flange plate, and the clamping jaws on the mounting seat can be controlled to open or contract through the auxiliary cylinder, so that the grabbing control of the groove part on the outer wall of the driving rod is realized; an inner sliding sleeve is arranged in the mounting seat, an inserting piece and a gripper are arranged on the inner sliding sleeve, the inserting piece can open a C-shaped clamping ring in the driving rod, and the driving head moves up and down to control and grip or release the gripping head of the driving rod.
The master cylinder is installed on a flange plate at the lower end through a connecting frame, a piston moving shaft at the upper end of the master cylinder is connected with the indicating rod, and the position movement of the piston moving shaft of the master cylinder is indicated through the position movement of the end part at the upper end of the indicating rod.
The auxiliary cylinder is installed on the upper end face of the lower end flange plate, the installation seat of the cylindrical structure is installed on the lower end face of the lower end flange plate, the piston movement shaft on the auxiliary cylinder is fixedly connected with the sliding sleeve sleeved on the installation seat, and the sliding sleeve is driven to move up and down along the installation seat through the auxiliary cylinder.
The side wall of the mounting seat is provided with a through hole, the jaw is fixed in the through hole of the mounting seat through a rotating pin, the upper part and the lower part of the jaw are both provided with a convex structure, the sliding sleeve is sleeved on the mounting seat in a matching manner, the side wall of the sliding sleeve is provided with the through hole, the convex structure at the upper part of the jaw is positioned in the through hole of the side wall of the sliding sleeve, and when the sliding sleeve moves upwards, the lower end part of the through hole of the sliding sleeve contacts the convex structure at the upper part of the; when the sliding sleeve moves downwards, the lower end part of the through hole of the sliding sleeve contacts the raised structure at the lower part of the clamping jaw, extrudes and enables the lower end of the clamping jaw to contract inwards, and is attached to the groove on the outer wall of the driving rod.
The insert is positioned in the center of the inner sliding sleeve, the shape of the C-shaped snap ring in the insert and the control rod driving rod is matched, when the mounting seat is located on the driving rod, the insert extends into the C-shaped snap ring and props the C-shaped snap ring open, and constraint on the driving rod grabbing head is relieved.
The gripper is circumferentially arranged in the inner sliding sleeve through the rotating pin, the end part of the lower end of the driving head is matched with the shape of the upper part of the gripper, and the lower part of the gripper is controlled to rotate around the rotating pin by moving the driving head up and down.
The gripper is provided with three convex structures, the end part of the driving head is matched with the convex structures of the gripper and is positioned between the first convex structure and the second convex structure at the upper end of the gripper, when the driving head extends out, the driving head contacts the second convex structure, the gripper rotates around the rotating pin, and the third convex structure at the lower end of the gripper is enabled to be outwards opened; when the driving head retracts, the driving head is contacted with the first convex structure at the upper end of the gripper, the gripper is pushed to rotate around the rotating pin, and the third convex structure at the lower end of the gripper is retracted inwards.
The third convex structure of the gripper is in a claw shape and is matched with the gripper head groove structure of the control rod driving rod.
The upper end of the indicating rod is also provided with a lifting ring, and the whole device can be transported through the lifting ring.
The invention has the following remarkable effects: the device for unlocking the control rod drive rod has a simple and reliable structure, and can realize unlocking and connection of the control rod drive rod and the control rod assembly at a long distance; meanwhile, the unlocking condition of the driving rod and the control rod can be displayed through the position device of the indicating rod.
Drawings
Fig. 1 is a schematic structural view of a conventional driving rod;
FIG. 2 is a schematic structural view of an apparatus for unlocking a control rod drive rod according to the present invention;
FIG. 3 is an enlarged view of a portion of the end of FIG. 2;
in the figure: 1. a master cylinder; 2. an auxiliary cylinder; 3. a gripper; 4. a sliding sleeve; 5. a claw; 6. a hoisting ring; 7. an indication lever; 8. a drive head; 9. an insert; 10. an inner sliding sleeve; 11. and (7) mounting a seat.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 2 and 3, a device for unlocking a control rod driving rod comprises a main cylinder 1, an auxiliary cylinder 2, a driving head 8, an inner sliding sleeve 10 and a mounting seat 11, wherein the main cylinder 1 is mounted on a lower end flange plate through a connecting frame, a piston motion shaft at the upper end of the main cylinder 1 is connected with an indication rod 7, and the position movement of the piston motion shaft of the main cylinder 1 is indicated through the position movement of the upper end of the indication rod 7; a piston motion shaft at the lower end of the main cylinder 1 is connected with the driving head 8, and the driving head 8 is driven to move up and down by the motion of the piston motion shaft of the main cylinder 1; the auxiliary cylinder 2 is installed on the upper end face of the lower end flange plate, the installation seat 11 of a cylindrical structure is installed on the lower end face of the lower end flange plate, a piston moving shaft on the auxiliary cylinder 2 is fixedly connected with the sliding sleeve 4 sleeved on the installation seat 11, the sliding sleeve 4 is driven to move up and down along the installation seat 11 through the auxiliary cylinder 2, a through hole is formed in the side wall of the installation seat 11, the clamping jaw 5 is fixed in the through hole of the installation seat 11 through a rotating pin, the upper portion and the lower portion of the clamping jaw 5 are both of a convex structure, the sliding sleeve 4 is sleeved on the installation seat 11 in a matching mode, a through hole is formed in the side wall of the sliding sleeve 4, the convex structure on the upper portion of the clamping jaw 5 is located in the through hole in the side wall of the sliding sleeve 4, when the sliding sleeve 4 moves upwards, the lower end; when the sliding sleeve 4 moves downwards, the lower end part of the through hole of the sliding sleeve 4 contacts the lower convex structure of the clamping jaw 5, and the lower end of the clamping jaw 5 is extruded and contracted inwards; the inner sliding sleeve 10 is arranged inside the mounting seat 11, and the insert 9 is fixed on the inner sliding sleeve 10, wherein the insert 9 can be inserted into the driving rod and can open the C-shaped clamping ring when the mounting seat 11 is located on the driving rod; the gripper 3 is mounted on the inner sliding sleeve 10, the plurality of grippers 3 are circumferentially mounted in the inner sliding sleeve 10 through rotating pins, each gripper 3 is provided with three protruding structures, the end part of the driving head 8 is matched with the protruding structures of the grippers 3 and is positioned between the first protruding structure and the second protruding structure at the upper end of the gripper 3, when the driving head 8 extends out, the driving head contacts the second protruding structure, the grippers 3 rotate around the rotating pins, and the third protruding structures at the lower ends of the grippers 3 are enabled to be outwards opened; when the driving head 8 retracts, the driving head is contacted with the first convex structure at the upper end of the gripper 3, the gripper 3 rotates around the rotating pin, the third convex structure at the lower end of the gripper 3 retracts inwards, and the driving rod gripper head is gripped by utilizing the shape of a third convex claw; and a lifting ring 6 is also arranged at the upper end of the indicating rod 7, and the whole device can be transported through the lifting ring 6.
The specific working process of the device for unlocking the control rod drive rod comprises the following steps: before the device is used, the gripper 3 and the claw 5 are both in an open state, the lifting hook operates a lifting ring 6 of the device to move the lifting ring to the position above the driving rod, the device slowly descends after aligning with the driving rod, after the device is located on the driving rod, an insertion piece 9 supports a C-shaped clamping ring of the driving rod, the constraint on the gripper head of the driving rod is removed, the gripper head of the driving rod can be lifted, then the auxiliary cylinder 2 is operated to be in an extending state, the sliding sleeve 4 is in a lower position and moves downwards, a protruding structure at the lower end of the claw 5 is squeezed, the claw 5 is closed, the gripping of the driving rod is achieved, then the main cylinder 1 is operated to be in a retracting state, the driving head 8 is lifted, the gripper 3 is driven to be closed, the gripper head of the driving rod is gripped and lifted.
Claims (9)
1. The utility model provides a realize device of control rod actuating lever unblock which characterized in that: the device comprises a main cylinder (1), an auxiliary cylinder (2), a driving head (8), an inner sliding sleeve (10) and a mounting seat (11), wherein a piston motion shaft at the lower end of the main cylinder (1) is connected with the driving head (8) and drives the driving head (8) to move up and down; the mounting seat (11) and the auxiliary cylinder (2) are mounted on the flange plate, and the jaw (5) on the mounting seat (11) can be controlled to open or contract through the auxiliary cylinder (2) so as to realize the grabbing control of the groove part on the outer wall of the driving rod; an inner sliding sleeve (10) is arranged in the mounting seat (11), an inserting piece (9) and a gripper (3) are arranged on the inner sliding sleeve (10), the inserting piece (9) can open a C-shaped clamping ring in the driving rod, and the driving head (8) is controlled to move up and down to grasp the gripper (3) and grasp or release the gripper of the driving rod.
2. The apparatus as set forth in claim 1, wherein: the master cylinder (1) is installed on a flange plate at the lower end through a connecting frame, a piston moving shaft at the upper end of the master cylinder (1) is connected with the indicating rod (7), and the position movement of the piston moving shaft of the master cylinder (1) is indicated through the position movement of the upper end part of the indicating rod (7).
3. The apparatus as set forth in claim 1, wherein: the auxiliary cylinder (2) is installed on the upper end face of the lower end flange plate, the installation seat (11) of the cylindrical structure is installed on the lower end face of the lower end flange plate, a piston motion shaft on the auxiliary cylinder (2) is fixedly connected with the sliding sleeve (4) sleeved on the installation seat (11), and the sliding sleeve (4) is driven by the auxiliary cylinder (2) to move up and down along the installation seat (11).
4. The apparatus as set forth in claim 3, wherein: the side wall of the mounting seat (11) is provided with a through hole, the jaw (5) is fixed in the through hole of the mounting seat (11) through a rotating pin, the upper part and the lower part of the jaw (5) are both provided with a convex structure, the sliding sleeve (4) is sleeved on the mounting seat (11) in a matching manner, the side wall of the sliding sleeve (4) is provided with a through hole, the convex structure at the upper part of the jaw (5) is positioned in the through hole of the side wall of the sliding sleeve (4), and when the sliding sleeve (4) moves upwards, the lower end part of the through hole of the sliding sleeve (4) contacts with the convex structure at the upper part of the jaw (5); when the sliding sleeve (4) moves downwards, the lower end part of the through hole of the sliding sleeve (4) contacts the protruding structure at the lower part of the clamping jaw (5), extrudes and enables the lower end of the clamping jaw (5) to contract inwards, and is attached to the groove of the outer wall of the driving rod.
5. The apparatus as set forth in claim 1, wherein: insert (9) be located the center of inner sliding sleeve (10), insert (9) and control rod actuating lever in the shape phase-match of C type snap ring department to when mount pad (11) are located on the actuating lever, insert (9) stretch into value C type snap ring department to prop C type snap ring open, remove the constraint to the actuating lever head of grabbing.
6. The apparatus as set forth in claim 1, wherein: the gripper (3) is circumferentially arranged in the inner sliding sleeve (10) through the rotating pin, the end part of the lower end of the driving head (8) is matched with the shape of the upper part of the gripper (3), and the gripper moves up and down through the driving head (8) to control the lower part of the gripper (3) to rotate around the rotating pin.
7. The apparatus as set forth in claim 6, wherein: the gripper (3) is provided with three convex structures, the end part of the driving head (8) is matched with the convex structures of the gripper (3) and is positioned between the first convex structure and the second convex structure at the upper end of the gripper (3), when the driving head (8) extends out, the driving head contacts the second convex structure, the gripper (3) rotates around the rotating pin, and the third convex structure at the lower end of the gripper (3) is enabled to be outwards opened; when the driving head (8) retracts, the driving head is contacted with the first convex structure at the upper end of the gripper (3), the gripper (3) is pushed to rotate around the rotating pin, and the third convex structure at the lower end of the gripper (3) is retracted inwards.
8. An apparatus for achieving control rod drive rod unlocking as defined in claim 6 or 7, wherein: and the third protruding structure of the gripper (3) is in a claw shape and is matched with the gripper head groove structure of the control rod drive rod.
9. The apparatus as set forth in claim 2, wherein: the upper end of the indicating rod (7) is also provided with a lifting ring (6), and the whole device can be transported through the lifting ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811574399.9A CN111354481A (en) | 2018-12-21 | 2018-12-21 | Device for unlocking control rod driving rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811574399.9A CN111354481A (en) | 2018-12-21 | 2018-12-21 | Device for unlocking control rod driving rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111354481A true CN111354481A (en) | 2020-06-30 |
Family
ID=71197923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811574399.9A Pending CN111354481A (en) | 2018-12-21 | 2018-12-21 | Device for unlocking control rod driving rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111354481A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112863717A (en) * | 2020-12-30 | 2021-05-28 | 中国原子能科学研究院 | A special gripping apparatus of formula of pushing down reloading for changing control rod assembly outer sleeve |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1225460A (en) * | 1968-12-21 | 1971-03-17 | ||
| CN201319265Y (en) * | 2008-11-20 | 2009-09-30 | 中国核电工程有限公司 | Unlocking and checking device of control rod driving rod |
| CN101783188A (en) * | 2009-01-21 | 2010-07-21 | 中国核电工程有限公司 | Unlocking device for control rod drive lever |
| CN102306505A (en) * | 2011-08-18 | 2012-01-04 | 中国核电工程有限公司 | Operation-jamming resisting control rod driving rod unlocking apparatus |
| CN103559919A (en) * | 2013-10-31 | 2014-02-05 | 四川华都核设备制造有限公司 | Control rod driving mechanism and method |
| US20150325318A1 (en) * | 2012-08-06 | 2015-11-12 | Smr Inventec, Llc | Fail-safe control rod drive system for nuclear reactor |
| CN204792003U (en) * | 2015-07-09 | 2015-11-18 | 中核核电运行管理有限公司 | A verification instrument that is used for telescopic core bar instrumental function validity |
| CN206210404U (en) * | 2016-09-27 | 2017-05-31 | 中国核电工程有限公司 | A kind of control rod drive rod tripper for preventing gas circuit from intaking |
| CN209401321U (en) * | 2018-12-21 | 2019-09-17 | 核动力运行研究所 | A kind of device for realizing the unlock of control rod drive rod |
-
2018
- 2018-12-21 CN CN201811574399.9A patent/CN111354481A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1225460A (en) * | 1968-12-21 | 1971-03-17 | ||
| CN201319265Y (en) * | 2008-11-20 | 2009-09-30 | 中国核电工程有限公司 | Unlocking and checking device of control rod driving rod |
| CN101783188A (en) * | 2009-01-21 | 2010-07-21 | 中国核电工程有限公司 | Unlocking device for control rod drive lever |
| CN102306505A (en) * | 2011-08-18 | 2012-01-04 | 中国核电工程有限公司 | Operation-jamming resisting control rod driving rod unlocking apparatus |
| US20150325318A1 (en) * | 2012-08-06 | 2015-11-12 | Smr Inventec, Llc | Fail-safe control rod drive system for nuclear reactor |
| CN103559919A (en) * | 2013-10-31 | 2014-02-05 | 四川华都核设备制造有限公司 | Control rod driving mechanism and method |
| CN204792003U (en) * | 2015-07-09 | 2015-11-18 | 中核核电运行管理有限公司 | A verification instrument that is used for telescopic core bar instrumental function validity |
| CN206210404U (en) * | 2016-09-27 | 2017-05-31 | 中国核电工程有限公司 | A kind of control rod drive rod tripper for preventing gas circuit from intaking |
| CN209401321U (en) * | 2018-12-21 | 2019-09-17 | 核动力运行研究所 | A kind of device for realizing the unlock of control rod drive rod |
Non-Patent Citations (1)
| Title |
|---|
| 李云;: "控制棒驱动杆解锁工具探讨", 设备管理与维修, no. 06, 6 June 2016 (2016-06-06) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112863717A (en) * | 2020-12-30 | 2021-05-28 | 中国原子能科学研究院 | A special gripping apparatus of formula of pushing down reloading for changing control rod assembly outer sleeve |
| CN112863717B (en) * | 2020-12-30 | 2022-12-13 | 中国原子能科学研究院 | A special gripping apparatus of formula of pushing down reloading for changing control rod assembly outer sleeve |
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