CN211125055U - Dismounting tool for underwater hole plug component of nuclear reactor - Google Patents
Dismounting tool for underwater hole plug component of nuclear reactor Download PDFInfo
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- CN211125055U CN211125055U CN201921517679.6U CN201921517679U CN211125055U CN 211125055 U CN211125055 U CN 211125055U CN 201921517679 U CN201921517679 U CN 201921517679U CN 211125055 U CN211125055 U CN 211125055U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model belongs to the technical field of the nuclear power maintenance, concretely relates to an assembly and disassembly tools that is used for nuclear reactor hole stopper part under water. A disassembly and assembly tool for an underwater plug component of a nuclear reactor, comprising: the device comprises a plurality of grippers, a locking rod, a gripper dragging frame, an outer joint, a first connecting sleeve, a compression spring and a driving device; the driving device can drive the outer joint and the locking rod to move up and down, under the condition that the driving device does not work, the compression spring extrudes the second step part on the upper surface of the first step part, and the protruding parts of the locking rod extrude the plurality of grippers to enable the grippers to be outwards expanded towards the radial outer side. The compression spring of the dismounting tool disclosed by the embodiment of the disclosure can ensure that the gripper is in the normally open position under the condition that the driving device does not work, and the phenomenon that the hole plug part which is grabbed is prevented from falling off due to the failure of the driving device is effectively reduced.
Description
Technical Field
The utility model belongs to the technical field of the nuclear power maintenance, concretely relates to an assembly and disassembly tools that is used for nuclear reactor hole stopper part under water.
Background
Generally speaking, the reactor internals have a very high activity after operation of the nuclear reactor assembly. Along with the continuous increase of the unit operation time, the radioactivity of each part in the reactor is enhanced, and parts of high-radioactivity parts on the reactor internals need to be disassembled and assembled under the working conditions of normal operation, maintenance, inspection and the like. The process of assembling and disassembling such parts can be carried out remotely only under the condition of boron-containing water shielding reactor, thereby ensuring the safety of operators.
An operator needs to use a tool to complete the processes of grabbing, maintaining, installing and the like of the reactor inner hole plug component, but all components of the tool in the related technology are connected by pin key spot welding, so that the risk of falling of foreign matters exists, the length of the tool is fixed, the elevation is controlled, and the height cannot be adjusted; the tool is long in length, heavy in weight, high in transportation difficulty and long in assembling time, and the efficiency of dismounting operation is seriously reduced.
SUMMERY OF THE UTILITY MODEL
To overcome the problems in the related art, a tool for disassembling and assembling an underwater hole plug part of a nuclear reactor is provided.
According to an aspect of an embodiment of the present disclosure, there is provided a disassembly and assembly tool for a nuclear reactor subsea plug component, including: the device comprises a plurality of grippers, a locking rod, a gripper dragging frame, an outer joint, a first connecting sleeve, a compression spring and a driving device;
the first connecting sleeve is of a cylindrical structure, the lower end of the driving device is connected with the upper end of the first connecting sleeve, and the lower end of the first connecting sleeve is connected with the upper end of the gripper dragging frame;
the gripper dragging frame is provided with a first through hole along the axial direction, and the inner surface of the lower end of the first through hole is provided with a first step part extending towards the radial inner side;
the outer joint is arranged in the first through hole, the upper end of the outer joint is connected with the driving device, the outer surface of the lower end of the outer joint is provided with a second step part extending towards the radial outer side, the compression spring is wound around the outer joint, and the compression spring is limited in a space between the driving device and the upper surface of the second step part in the first through hole;
the locking rod is arranged in the first through hole, the upper end of the locking rod is connected with the lower end of the outer joint, and the outer surface of the lower end of the locking rod is provided with a protruding part extending towards the radial outer side;
the plurality of grippers are respectively connected to the periphery of the lower end of the gripper dragging frame, and the lower end of each gripper can move towards the radial outer side of the gripper dragging frame or move towards the radial inner side of the gripper dragging frame;
the driving device can drive the outer joint and the locking rod to move up and down, under the condition that the driving device does not work, the compression spring extrudes the second step part on the upper surface of the first step part, and the protruding parts of the locking rod extrude the plurality of grippers to enable the grippers to be outwards expanded towards the radial outer side.
In one possible implementation, the disassembling tool for the nuclear reactor underwater hole plug component further comprises: and the lower end of the second connecting sleeve is connected with the upper end of the driving device.
In a possible implementation manner, the driving device is connected with the second connecting sleeve through a socket head cap screw.
In a possible implementation manner, the lower end of the first connecting sleeve is screwed with the upper end of the gripper dragging frame through threads.
In one possible implementation, the tool for disassembling a nuclear reactor underwater plug part further comprises: a cylindrical pin is arranged on the outer side of the cylinder,
the side wall of the lower end of the first connecting sleeve is provided with a first positioning pin hole along the radial direction, the side wall of the upper end of the gripper dragging frame is provided with a second positioning pin hole along the radial direction, and the first positioning pin hole is right opposite to the second positioning pin hole under the condition that the lower end of the first connecting sleeve is connected with the upper end of the gripper dragging frame;
the cylindrical pin is inserted into the first positioning pin hole and the second positioning pin hole to fix the first connecting sleeve and the gripper dragging frame.
In one possible implementation, the cylindrical pin is threadedly inserted into the inner wall of the first dowel hole and the second dowel hole.
In one possible implementation, the drive device is a cylinder.
In one possible implementation, the material of the dismounting tool for the nuclear reactor underwater hole plug component is 0Cr17Ni4Cu4 Nb.
The beneficial effects of the utility model reside in that: the compression spring of the dismounting tool disclosed by the embodiment of the disclosure can ensure that the gripper is in the normally open position under the condition that the driving device does not work, and the phenomenon that the hole plug part which is grabbed is prevented from falling off due to the failure of the driving device is effectively reduced. In addition, the assembling structure of the disassembling tool of the embodiment of the disclosure is simple, the disassembling tool is convenient to disassemble and assemble, and the efficiency of disassembling and assembling operation is favorably improved.
Drawings
FIG. 1 is an axial cross-sectional view of a disassembly tool for a nuclear reactor subsea plug component, according to an exemplary embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is an axial cross-sectional view of a disassembly tool for a nuclear reactor subsea plug component, according to an exemplary embodiment. As shown in fig. 1, the tool for removing a nuclear reactor underwater plug member includes: the gripper comprises a plurality of grippers 1, a locking rod 2, a gripper dragging frame 4, an outer joint 5, a first connecting sleeve 7, a compression spring 8 and a driving device 9.
In this disclosed embodiment, drive arrangement can be the cylinder, and the power of cylinder is sufficient, can be so that opening and shutting of assembly and disassembly tools gripper is more rapid and stable. It should be noted that other suitable devices (for example, a motor) may be selected as the driving device according to needs, and the type of the driving device is not limited in the embodiment of the present disclosure.
The material of the pick-and-place tool may comprise 0Cr17Ni4Cu4Nb, and typically 0Cr17Ni4Cu4Nb may be expressed as precipitated, hardened, martensitic stainless steel of copper, niobium/columbium, which is not susceptible to corrosion by boric acid water, radiation resistant and strong. Other types of materials may be selected as needed to manufacture the disassembly and assembly tool, which is not limited in the embodiments of the present disclosure.
As an example of this embodiment, as shown in fig. 1, the first connection sleeve 7 may have a cylindrical structure, the outer surface of the lower end of the driving device 9 and the inner surface of the upper end of the first connection sleeve 7 may have matching threads, and the lower end of the driving device 9 and the upper end of the first connection sleeve 7 may be screwed together by the threads. The inner surface of the lower end of the first connecting sleeve 7 and the outer surface of the upper end of the gripper dragging frame 4 can also be provided with matched threads, and the lower end of the first connecting sleeve 7 and the upper end of the gripper dragging frame 4 can be screwed through the threads. Like this, be favorable to the fast assembly to assembly and disassembly tools cylinder, improve assembly and disassembly tools's utilization efficiency.
The gripper dragging frame 4 has a first through hole formed in the axial direction, the inner surface of the lower end of the first through hole may have a first step portion extending toward the radial inner side, and in addition, the gripper dragging frame 4 may be tapered, so that the plug may be positioned more accurately during operation.
The outer joint 5 can be arranged in the first through hole, the upper end of the outer joint 5 can be connected with the driving device 9, for example, the lower surface of the driving device 9 can be provided with a blind hole with threads on the inner side, the outer side of the upper end of the outer joint 5 can be provided with threads matched with the threads of the blind hole, and the upper end of the outer joint 5 can be screwed into the blind hole. For another example, the lower surface of the driving device 9 may be provided with a first connecting buckle, the upper end of the outer joint 5 may be provided with a second connecting buckle, and the upper end of the outer joint 5 may be connected to the lower surface of the driving device 9 by the first buckle and the second buckle.
The outer surface of the lower end of the outer joint 5 may have a second stepped portion extending toward the radially outer side, the compression spring 8 may be wound around the outer joint 5, and the compression spring 8 may be confined in a space between the lower surface of the driving device 9 in the first through hole to the upper surface of the second stepped portion. It should be noted that the style and material of the compression spring 8 may be selected according to the requirement, and the embodiment of the present disclosure does not limit this.
The check lock lever 2 can be arranged in the first through hole, the upper end of the check lock lever 2 can be connected with the lower end of the outer joint 5, for example, the lower surface of the second step part of the outer joint 5 can be provided with a blind hole with threads on the inner side, the outer side of the upper end of the check lock lever 2 can be provided with threads matched with the threads of the blind hole, the upper end of the check lock lever 2 can be screwed into the blind hole, in addition, the outer surface of the lower end of the check lock lever 2 can also be provided with a protruding part extending towards the radial outer side (the protruding part can be a cylinder, or a circular truncated cone or a vertebral body, the appearance of the protruding part is not.
As shown in fig. 1, a plurality of grippers 1 can be connected, for example, by means of shafts 3, in each case around the lower end of a gripper dragging frame 4, the lower end of each gripper 1 being able to move radially outward of the gripper dragging frame 4 or radially inward of the gripper dragging frame 4. The assembled shaft 3 can be subjected to spot welding, and the base hole clearance fit can ensure the freedom degree of the movement of the gripper under the normal working condition.
In the case where the driving means 9 is not operated (for example, the driving means 9 is failed, or the driving means 9 is powered off, etc.), the compression spring 8 may be relaxed and press the second stepped portion also against the upper surface of the first stepped portion, and the projection of the lock lever 2 presses the plurality of grippers 1 so that each gripper 1 is outwardly expanded to the maximum toward the radial outside.
The compression spring of the dismounting tool disclosed by the embodiment of the disclosure can ensure that the gripper is in the normally open position under the condition that the driving device does not work, and the phenomenon that the hole plug part which is grabbed is prevented from falling off due to the failure of the driving device is effectively reduced. In addition, the assembling structure of the disassembling tool of the embodiment of the disclosure is simple, the disassembling tool is convenient to disassemble and assemble, and the efficiency of disassembling and assembling operation is favorably improved.
In a possible implementation mode, can be under the condition that the lower surface of second step portion is pressed and is supported first step portion upper surface for compression spring still is in the state of compressed, can form thrust down to second step portion like this, makes the state of the normal open position of grabhook more stable, is favorable to further preventing that the hole plug part of snatching from droing.
In one possible implementation, as shown in fig. 1, the disassembling tool may further include: a second connecting sleeve 10, the lower end of the second connecting sleeve 10 can be connected with the upper end of the driving device 9. Thus, the second connecting sleeve 10 can lengthen the length of the disassembling tool. For example, the second connecting sleeve can be a telescopic sleeve rod, so that the dismounting tool provided by the embodiment of the disclosure can be set to be different in length according to needs, and different working conditions can be flexibly adapted.
In one possible embodiment, as shown in fig. 1, the drive device 9 can be connected to the second connecting sleeve 10 by means of a socket head cap screw 11. Therefore, the coaxiality of processing can be ensured while the position of the driving device is restrained, and the action strokes of the driving device are consistent.
In one possible implementation, as shown in fig. 1, the disassembling tool may further include: the cylindrical pin 6, the lateral wall of the lower end of the first connecting sleeve 7 can be provided with a first positioning pin hole along the radial direction, the lateral wall of the upper end of the gripper dragging frame 4 can also be provided with a second positioning pin hole along the radial direction, and under the condition that the lower end of the first connecting sleeve 7 is connected with the upper end of the gripper dragging frame 4, the first positioning pin hole can be right opposite to the second positioning pin hole, and the cylindrical pin 6 can be inserted into the first positioning pin hole and the second positioning pin hole so as to fix the first connecting sleeve 7 and the gripper dragging frame 4. For example, the cylindrical pin and the first positioning pin hole and the second positioning pin hole can be screwed through threads, and spot welding treatment can be performed on the assembled cylindrical pin 6, so that the connection firmness degree of the cylindrical pin 6 is strengthened, and foreign matters are effectively prevented from entering.
In an application example, a driving device is taken as an example of a cylinder.
After the assembly and disassembly tool is assembled, the maximum diameter can be no more than 51mm (millimeter), and the maximum length can be no more than 900mm, so that the assembly and disassembly tool can be stored on site, and the transportation cost and the storage space are saved; the total mass of the disassembling tool can not exceed 6.5Kg (kilogram), so that manual holding and convenient transportation can be realized.
Preparing for site construction: a nitrogen cylinder can be used as a cylinder driving air source and connected to a control air port of the pneumatic three-way switch valve, and an inlet and an outlet are respectively connected to the upper end and the lower end of the cylinder. The dismounting tool is placed on a temporary bridge hanger, an air source of an air cylinder is opened, for example, the pressure value can be more than or equal to 0.8Mpa (megapascal), a valve is actuated, the stroke of a tool core rod is fixed, and the normal action of a gripper indicates that the tool is assembled.
Configuration of field construction operators: the project was conducted for at least five people. The main operator is responsible for mainly operating the dismounting tool to dismount the hole plug component; one person acts as an auxiliary aid to move and right the tool on the temporary bridge; one person is responsible for the hand-operated temporary bridge to move forwards and backwards above the reactor pool; one person operates the pneumatic switch valve to enable the tool gripper to act; one person is responsible for observing the underwater television display to assist the operation of a main operator. All personnel follow the master operator instructions. The tool is used as a professional tool for the overhaul bulk of the square housemountain, effectively ensures the continuous overhaul work, and smoothly finishes the work while ensuring the safety of people and equipment.
Grabbing the hole plug component: a main operator holds the special tool by hand to command the temporary bridge to move right above the hole plug part (an underwater television observer can perform an auxiliary function), sends a command to operate the pneumatic switch valve, closes the gripper of the action tool, plugs the tool into the hole plug part, sends a command again to operate the action switch valve, opens the gripper of the action tool and grips the hole plug part.
The hole plug part is in place: the main operation is under the assistance of the underwater television observer, the command is sent to the temporary bridge to move to the position where the hole plug part is located, the command is sent to operate the pneumatic switch valve, the action tool gripper is closed, the hole plug part is located, and the operation is finished. The disassembly and assembly tool is used as a professional tool for the overhaul bulk of the square mountain, so that the overhaul work is effectively ensured to be continuously carried out, and the work is smoothly finished while the safety of people and equipment is ensured.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (8)
1. A disassembly and assembly tool for an underwater plug component of a nuclear reactor, comprising: the device comprises a plurality of grippers, a locking rod, a gripper dragging frame, an outer joint, a first connecting sleeve, a compression spring and a driving device;
the first connecting sleeve is of a cylindrical structure, the lower end of the driving device is connected with the upper end of the first connecting sleeve, and the lower end of the first connecting sleeve is connected with the upper end of the gripper dragging frame;
the gripper dragging frame is provided with a first through hole along the axial direction, and the inner surface of the lower end of the first through hole is provided with a first step part extending towards the radial inner side;
the outer joint is arranged in the first through hole, the upper end of the outer joint is connected with the driving device, the outer surface of the lower end of the outer joint is provided with a second step part extending towards the radial outer side, the compression spring is wound around the outer joint, and the compression spring is limited in a space between the driving device and the upper surface of the second step part in the first through hole;
the locking rod is arranged in the first through hole, the upper end of the locking rod is connected with the lower end of the outer joint, and the outer surface of the lower end of the locking rod is provided with a protruding part extending towards the radial outer side;
the plurality of grippers are respectively connected to the periphery of the lower end of the gripper dragging frame, and the lower end of each gripper can move towards the radial outer side of the gripper dragging frame or move towards the radial inner side of the gripper dragging frame;
the driving device can drive the outer joint and the locking rod to move up and down, under the condition that the driving device does not work, the compression spring extrudes the second step part on the upper surface of the first step part, and the protruding parts of the locking rod extrude the plurality of grippers to enable the grippers to be outwards expanded towards the radial outer side.
2. A disassembly and assembly tool for a nuclear reactor subsea plug component according to claim 1, further comprising: and the lower end of the second connecting sleeve is connected with the upper end of the driving device.
3. A tool as claimed in claim 2, wherein the drive means is connected to the second connecting sleeve by means of a socket head cap screw.
4. A tool for disassembling and assembling a nuclear reactor subsea plug assembly according to claim 1, wherein said first coupling sleeve is threadably engaged with said upper end of said gripper dragging frame at a lower end thereof.
5. A disassembly and assembly tool for a nuclear reactor subsea plug component according to claim 4, further comprising: a cylindrical pin is arranged on the outer side of the cylinder,
the side wall of the lower end of the first connecting sleeve is provided with a first positioning pin hole along the radial direction, the side wall of the upper end of the gripper dragging frame is provided with a second positioning pin hole along the radial direction, and the first positioning pin hole is right opposite to the second positioning pin hole under the condition that the lower end of the first connecting sleeve is connected with the upper end of the gripper dragging frame;
the cylindrical pin is inserted into the first positioning pin hole and the second positioning pin hole to fix the first connecting sleeve and the gripper dragging frame.
6. A disassembly and assembly tool for a nuclear reactor subsea plug component according to claim 5, wherein said cylindrical pin is threadably inserted into said inner wall of said first dowel hole and said second dowel hole.
7. A tool as claimed in claim 1, wherein the driving means is a pneumatic cylinder.
8. The tool of claim 1, wherein the material of the tool is 0Cr17Ni4Cu4 Nb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921517679.6U CN211125055U (en) | 2019-09-12 | 2019-09-12 | Dismounting tool for underwater hole plug component of nuclear reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921517679.6U CN211125055U (en) | 2019-09-12 | 2019-09-12 | Dismounting tool for underwater hole plug component of nuclear reactor |
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| Publication Number | Publication Date |
|---|---|
| CN211125055U true CN211125055U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921517679.6U Active CN211125055U (en) | 2019-09-12 | 2019-09-12 | Dismounting tool for underwater hole plug component of nuclear reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110570959A (en) * | 2019-09-12 | 2019-12-13 | 中核核电运行管理有限公司 | Dismounting tool for underwater hole plug component of nuclear reactor |
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2019
- 2019-09-12 CN CN201921517679.6U patent/CN211125055U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110570959A (en) * | 2019-09-12 | 2019-12-13 | 中核核电运行管理有限公司 | Dismounting tool for underwater hole plug component of nuclear reactor |
| CN110570959B (en) * | 2019-09-12 | 2024-08-09 | 中核核电运行管理有限公司 | Dismounting tool for nuclear reactor underwater hole plug component |
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