CN111804981A - Cross type shearing assembly for dismantling nuclear reactor detector assembly - Google Patents
Cross type shearing assembly for dismantling nuclear reactor detector assembly Download PDFInfo
- Publication number
- CN111804981A CN111804981A CN202010716391.2A CN202010716391A CN111804981A CN 111804981 A CN111804981 A CN 111804981A CN 202010716391 A CN202010716391 A CN 202010716391A CN 111804981 A CN111804981 A CN 111804981A
- Authority
- CN
- China
- Prior art keywords
- cutter
- assembly
- groove
- detector assembly
- nuclear reactor
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shearing Machines (AREA)
Abstract
The invention discloses a crossed shearing assembly for dismantling a nuclear reactor detector assembly, which comprises a crossed cutter, a push rod, a base and a driving mechanism, wherein the cross cutter is arranged on the base; one end of the push rod is connected with a power output shaft of the driving mechanism, and the other end of the push rod is provided with a V-shaped groove; the crossed cutter is fixed on the base and comprises a shearing end and a cutter handle end, the shearing end is used for shearing the detector assembly, the cutter handle end is embedded into the V-shaped groove, and a reset spring is arranged between 2 cutter handles at the cutter handle end. The shearing separation device realizes the shearing separation of the high-amplification section and the low-amplification section of the detector assembly, and has the advantages of small structure and convenience in operation.
Description
Technical Field
The invention relates to the technical field of refueling and overhauling of pressurized water reactor nuclear power plants, in particular to a crossed shearing assembly for disassembling a nuclear reactor detector assembly.
Background
Detectors for core measurement systems in second-generation and second-generation pressurized water reactor nuclear power stations are divided into thermocouples for measuring temperature and neutron flux detectors for measuring flux. The thermocouple is led in from the top cover of the pressure vessel, guided by the thermocouple column assembly and positioned at a specified measuring point position, and the lower end of the thermocouple is positioned at the core outlet of the upper core plate. The flux detector is led in from the bottom end socket of the pressure vessel, and is guided by the instrument sleeve and the finger sleeve when needed to enter the guide pipe in the fuel assembly at a specified measuring point. The design life of both detector assemblies is the plant's full life, not considering replacement except for special cases. Power plants at home and abroad have been replaced precedently, and an underwater shearing tool is adopted to replace the damaged flux detector individually.
The detector for the third-generation nuclear power station reactor core measuring system is changed into a detector which is completely introduced from a pressure vessel top cover, and the detector assembly is guided to a specified measuring point position through a guide structure arranged on an in-reactor component until the detector assembly is inserted into a guide pipe in the middle of a fuel assembly for a certain depth. The detector assembly inserted into the core has a housing of type 304 stainless steel with neutron detection elements and thermocouples inside. The probe assembly is typically installed after the reactor is installed in the fuel assembly and inserted into the fuel assembly during operation until the useful life of the probe assembly is reached. Due to burnup and irradiation effects, the life of the detector generally does not reach 60 years in a nuclear power plant, and therefore, after the detector assembly reaches a certain service life, the detector assembly needs to be removed to the life during refueling. The detector assembly is divided into a high-radioactivity section and a low-radioactivity section, and the high-radioactivity section and the low-radioactivity section are separated in the dismantling work, so that the volume reduction, transportation, storage and disposal in the later period are facilitated.
Disclosure of Invention
The invention aims to provide a crossed shearing assembly for disassembling a nuclear reactor detector assembly, which is used for realizing the shearing separation of a high-amplification section and a low-amplification section of the detector assembly and has the advantages of small structure and convenience in operation.
The invention is realized by the following technical scheme:
a cross-type shearing assembly for dismantling a nuclear reactor detector assembly comprises a cross-type cutter, a push rod, a base and a driving mechanism;
one end of the push rod is connected with a power output shaft of the driving mechanism, and the other end of the push rod is provided with a V-shaped groove;
the crossed cutter is fixed on the base and comprises a shearing end and a cutter handle end, the shearing end is used for shearing the detector assembly, the cutter handle end is embedded into the V-shaped groove, and a reset spring is arranged between 2 cutter handles at the cutter handle end.
Preferably, a catch notch is provided at the end of the base for securing the pair of probes prior to shearing to facilitate shearing.
The V-shaped groove is relatively displaced with the tool shank of the crossed tool under the action of the driving mechanism, the reset spring can play a reset role under the action of self restoring force, when external force disappears, the reset spring can automatically reset after shearing, and 2 tool shanks at the end of the tool shank are respectively matched with 2 side walls of the V-shaped groove.
The working principle of the invention is as follows:
when the detector assembly is required to be cut, the driving mechanism is operated to work, the power output shaft of the driving mechanism pushes the push rod to move towards the direction of the cross type cutter, namely the V-shaped groove moves towards the direction of the cross type cutter, the cross type cutter is fixed on the base and keeps moving, relative displacement is generated between the cross type cutter and the V-shaped groove, namely the cutter handle end of the cross type cutter gradually moves towards one end of the groove bottom of the V-shaped groove from one end of the groove opening of the V-shaped groove, because the distance between 2 side walls of the V-shaped groove is reduced from one end of the groove opening to one end of the groove bottom, in the moving process of the push rod, the distance between 2 cutter handles is reduced under the extrusion of the V-shaped groove, the cutting end realizes the cutting of the detector assembly, the reset spring 1 is compressed, after the operation of the driving mechanism is finished, the push rod 3 is pulled by the power output shaft of, returning to the initial state, the 2 tool shanks are reset under the restoring force of the reset spring 1.
The crossed cutter is connected with the push rod and can move in the V-shaped groove of the push rod, the push rod is driven to move through the driving mechanism, the V-shaped groove of the push rod extrudes the cutter handle of the crossed cutter, the shearing function is achieved, after the cutting is completed, the driving mechanism resets to drive the push rod to move rightwards to return to the initial position, the crossed cutter completes the automatic resetting function under the action of the resetting spring, the shearing separation of the high-level section and the low-level section of the detector assembly is achieved, and the advantages of small structure and convenience in operation are achieved.
Further, the base includes fixed body, fixed body is hollow tubular structure, the one end of fixed body is provided with the fixed slot, the crossing cutter is fixed in the fixed slot, the one end that the V type groove was kept away from to the push rod passes fixed body and actuating mechanism's power take off hub connection.
The hollow cylindrical structure plays a role in guiding the movement of the push rod.
Further, the fixed slot includes the bottom plate, the symmetry is provided with 2 curb plates on the bottom plate, two lateral walls and the inboard contact of curb plate in V type groove.
The side plates play a role in guiding the movement of the V-shaped groove.
The power output shaft of the driving mechanism is connected with the push rod through the connecting sleeve, and the connecting sleeve protrudes out of the base and the driving mechanism in the radial direction.
The radial direction is vertical to the moving direction of the push rod, the connecting sleeve can play a supporting role, the connecting sleeve can be placed on the ground or other fixed structures in the working process, and the work of the whole assembly is not affected.
Further, the connecting sleeve comprises a cylinder body, and 2 supporting plates are arranged on the outer wall of the cylinder body.
Furthermore, the thickness of 2 lateral walls of the V-shaped groove is gradually increased from one end of the opening of the groove to one end of the bottom of the groove.
Because when the handle of a knife relative movement of crossing cutter to the tank bottom one end in V type groove, the extrusion force that receives V type groove is great, is close to tank bottom one end more, and the extrusion force that receives V type groove when crossing cutter is big more, and the pressure that the V type groove was given to crossing cutter simultaneously is also big more, and the atress demand in V type groove can be satisfied in the above-mentioned setting, improves its life.
Furthermore, the inner wall of the V-shaped groove is a smooth curved surface, and the outer wall of the V-shaped groove is of a plane structure.
The arrangement is favorable for relative movement of the tool shank of the crossed tool in the V-shaped groove, the outer wall of the V-shaped groove is of a planar structure, the force bearing requirement is facilitated, and meanwhile, the guide structure is convenient to arrange.
Further, the cross type cutter is in a scissors structure.
Further, the driving mechanism is an electric cylinder.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the crossed cutter is connected with the push rod and can move in the V-shaped groove of the push rod, the drive mechanism drives the push rod to move, the V-shaped groove of the push rod extrudes the cutter handle of the crossed cutter to realize a shearing function, after the cutting is finished, the drive mechanism resets to drive the push rod to move rightwards to return to an initial position, the crossed cutter completes an automatic resetting function under the action of the reset spring, and the shearing separation of a high-level section and a low-level section of the detector assembly is realized.
2. The invention has small structure and convenient operation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural view of a cross shear assembly.
Reference numbers and corresponding part names in the drawings:
1-a return spring, 2-a cross cutter, 3-a push rod, 4-a base, 5-a connecting sleeve and 6-a driving mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
as shown in fig. 1, a cross shear assembly for removing a nuclear reactor detector assembly comprises a cross cutter 2, a push rod 3, a base 4 and a driving mechanism 6;
one end of the push rod 3 is connected with a power output shaft of the driving mechanism 6, and the other end of the push rod is provided with a V-shaped groove;
the crossed cutter 2 is fixed on the base 4, the crossed cutter 2 comprises a shearing end and a cutter handle end, the shearing end is used for shearing the detector assembly, the cutter handle end is embedded into the V-shaped groove, and a reset spring 1 is arranged between 2 cutter handles of the cutter handle end;
the crossed cutter 2 is in a scissors structure; the driving mechanism 6 is an electric cylinder.
The working process of the embodiment is as follows:
when the detector assembly is required to be cut, the driving mechanism 6 is operated, the power output shaft of the driving mechanism 6 pushes the push rod 3 to move towards the direction of the cross type cutter 2, namely the V-shaped groove moves towards the direction of the cross type cutter 2, the cross type cutter 2 is fixed on the base 4 and keeps moving, and relative displacement is generated between the cross type cutter and the V-shaped groove, namely the cutter handle end of the cross type cutter 2 gradually moves towards one end of the groove bottom of the V-shaped groove from one end of the groove opening of the V-shaped groove, because the distance between 2 side walls of the V-shaped groove is reduced from one end of the groove opening to one end of the groove bottom, in the moving process of the push rod 3, the cutter handle end of the cross type cutter 2 is extruded by the V-shaped groove, the distance between 2 cutter handles is reduced, the extrusion force of the cutter handles is amplified and converted into the shearing force of the, after the operation, the driving mechanism 6 is operated, the power output shaft of the driving mechanism 6 pulls the push rod 3 to move towards the direction away from the crossed cutter 2, the cutter returns to the initial state, and the 2 cutter handles are reset under the restoring force action of the reset spring 1.
Example 2:
as shown in fig. 1, in this embodiment, based on embodiment 1, the base 4 includes a fixed body, the fixed body is a hollow cylindrical structure, one end of the fixed body is provided with a fixed groove, the cross type cutter 2 is fixed in the fixed groove, and one end of the push rod 3, which is far away from the V-shaped groove, passes through the fixed body and is connected with the power output shaft of the driving mechanism 6; the fixed slot includes the bottom plate, the symmetry is provided with 2 curb plates on the bottom plate, two lateral walls and the inboard contact of curb plate in V type groove.
In this embodiment, 2 curb plates can play the guide effect in the removal of V type groove, hollow tubular structure plays direction and limiting displacement to push rod 3, improves the stability of removing.
Example 3:
as shown in fig. 1, this embodiment is based on embodiment 1, and further includes a connecting sleeve 5, where one end of the push rod 3 is connected to a power output shaft of the driving mechanism 6 through the connecting sleeve 5, and the connecting sleeve 5 protrudes from the base 4 and the driving mechanism 6 in a radial direction; connecting sleeve 5 includes the barrel, be provided with 2 backup pads on the outer wall of barrel.
Example 4:
as shown in fig. 1, in the present embodiment based on any one of embodiments 1 to 3, the thicknesses of the 2 side walls of the V-shaped groove gradually increase from the end of the opening of the groove to the end of the bottom of the groove; the inner wall of the V-shaped groove is a smooth curved surface, and the outer wall of the V-shaped groove is of a plane structure.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A cross type shearing assembly for dismantling a nuclear reactor detector assembly is characterized by comprising a cross type cutter (2), a push rod (3), a base (4) and a driving mechanism (6);
one end of the push rod (3) is connected with a power output shaft of the driving mechanism (6), and the other end of the push rod is provided with a V-shaped groove;
the crossed cutter (2) is fixed on the base (4), the crossed cutter (2) comprises a shearing end and a cutter handle end, the shearing end is used for shearing the detector assembly, the cutter handle end is embedded into the V-shaped groove, and a reset spring (1) is arranged between 2 cutter handles of the cutter handle end.
2. The crossed shearing assembly for dismantling the detector assembly of the nuclear reactor as claimed in claim 1, wherein the base (4) comprises a fixed body, the fixed body is a hollow cylindrical structure, a fixing groove is formed in one end of the fixed body, the crossed cutter (2) is fixed in the fixing groove, and one end, far away from the V-shaped groove, of the push rod (3) penetrates through the fixed body and is connected with a power output shaft of the driving mechanism (6).
3. The nuclear reactor detector assembly removal cross-shear assembly of claim 2, wherein the retaining groove comprises a bottom plate, the bottom plate is symmetrically provided with 2 side plates, and two side walls of the V-shaped groove are in contact with the inner sides of the side plates.
4. The nuclear reactor detector assembly removal cross shear assembly of claim 1, further comprising a connecting sleeve (5), wherein one end of the push rod (3) is connected with a power output shaft of the driving mechanism (6) through the connecting sleeve (5), and the connecting sleeve (5) protrudes from the base (4) and the driving mechanism (6) in a radial direction.
5. A nuclear reactor detector assembly removal cross-shear assembly as claimed in claim 4, wherein the connecting sleeve (5) comprises a cylinder with 2 support plates on the outer wall.
6. A nuclear reactor detector assembly removal cross-shear assembly as defined in claim 1, wherein the 2 sidewalls of the V-groove have a gradually increasing thickness from the open end of the groove to the bottom end of the groove.
7. The nuclear reactor detector assembly removal cross-shear assembly of claim 1, wherein the inner wall of the V-groove is a smooth curved surface and the outer wall of the V-groove is a planar structure.
8. A nuclear reactor detector assembly removal cross-shear assembly as claimed in any one of claims 1 to 7, in which the cross-cutter (2) is of scissors construction.
9. A nuclear reactor detector assembly removal cross-shear assembly as claimed in any one of claims 1 to 7, in which the drive mechanism (6) is an electric cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716391.2A CN111804981A (en) | 2020-07-23 | 2020-07-23 | Cross type shearing assembly for dismantling nuclear reactor detector assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716391.2A CN111804981A (en) | 2020-07-23 | 2020-07-23 | Cross type shearing assembly for dismantling nuclear reactor detector assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111804981A true CN111804981A (en) | 2020-10-23 |
Family
ID=72862353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010716391.2A Pending CN111804981A (en) | 2020-07-23 | 2020-07-23 | Cross type shearing assembly for dismantling nuclear reactor detector assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111804981A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4897921A (en) * | 1988-08-04 | 1990-02-06 | Allied Gator Inc. | Metal cutting shear with changeable multiple cutting edge portions |
| JP2004098186A (en) * | 2002-09-05 | 2004-04-02 | Toshiba Mach Co Ltd | Collet clamping device |
| CN2675312Y (en) * | 2003-12-06 | 2005-02-02 | 汪大汪 | Waste metal hydraulic shearing machine |
| CN1853835A (en) * | 2005-04-27 | 2006-11-01 | 创科实业有限公司 | Rotatable chuck |
| CN202571102U (en) * | 2012-05-23 | 2012-12-05 | 浙江田中精机股份有限公司 | Scissors device |
| JP2015182174A (en) * | 2014-03-24 | 2015-10-22 | 大成建設株式会社 | Cutter unit and cutter arm |
| CN210305942U (en) * | 2019-07-04 | 2020-04-14 | 山东铭德港城机械有限公司 | Multifunctional hydraulic shear for engineering machinery |
-
2020
- 2020-07-23 CN CN202010716391.2A patent/CN111804981A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4897921A (en) * | 1988-08-04 | 1990-02-06 | Allied Gator Inc. | Metal cutting shear with changeable multiple cutting edge portions |
| JP2004098186A (en) * | 2002-09-05 | 2004-04-02 | Toshiba Mach Co Ltd | Collet clamping device |
| CN2675312Y (en) * | 2003-12-06 | 2005-02-02 | 汪大汪 | Waste metal hydraulic shearing machine |
| CN1853835A (en) * | 2005-04-27 | 2006-11-01 | 创科实业有限公司 | Rotatable chuck |
| CN202571102U (en) * | 2012-05-23 | 2012-12-05 | 浙江田中精机股份有限公司 | Scissors device |
| JP2015182174A (en) * | 2014-03-24 | 2015-10-22 | 大成建設株式会社 | Cutter unit and cutter arm |
| CN210305942U (en) * | 2019-07-04 | 2020-04-14 | 山东铭德港城机械有限公司 | Multifunctional hydraulic shear for engineering machinery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1179073A (en) | Device for fixing a guide tube of a nuclear fuel assembly to the end plates thereof | |
| US7668284B2 (en) | Tube-in-tube threaded dashpot end plug | |
| US4147589A (en) | Control rod for a nuclear reactor | |
| CN111804981A (en) | Cross type shearing assembly for dismantling nuclear reactor detector assembly | |
| EP0140588A1 (en) | Nuclear reactor fuel assembly with a removable top nozzle | |
| KR100882195B1 (en) | Guide thimble of the dual tube type structure for nuclear fuel assembly | |
| US4716018A (en) | End plug with truncated tapered leading end configuration | |
| EP2109113B1 (en) | Detachable nuclear reactor fuel assembly component | |
| US9208904B2 (en) | Reinforcement for a nuclear fuel assembly | |
| CN112420224A (en) | Locking device and fuel assembly suitable for marine reactor | |
| KR101859025B1 (en) | Circumferential sampling tool having multiple sample cutters | |
| JPH0458911B2 (en) | ||
| JPH0478957B2 (en) | ||
| JPH0743675Y2 (en) | Lock tube removal device for fuel assemblies | |
| CN202512906U (en) | Nuclear fuel assembly | |
| JPH0116601B2 (en) | ||
| EP0201753A1 (en) | Apparatus for applying and end plug to an end of a nuclear fuel rod tube | |
| KR940004832B1 (en) | Top nozzle removal and replacement fixture and method in a reconstitutable fuel assembly | |
| US5146676A (en) | Hand-actuated spring clip insertion tool | |
| JPH1068791A (en) | Separating mechanism for separating control rod from absorbing element for nuclear reactor | |
| US5974924A (en) | Cutting appliance for large cylindraceous objects | |
| CN221685536U (en) | Environment monitoring device for water supply and drainage building engineering | |
| CN218313405U (en) | Automatic positioning working disc device for accurately taking materials by matching manipulator | |
| CN114354248B (en) | Rotary type remote pipe inner wall sampling tool | |
| US20220115153A1 (en) | Sheet based, in-bundle reactivity control device for storage of spent nuclear fuel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201023 |
|
| RJ01 | Rejection of invention patent application after publication |