CN217061458U - Centering guide system of nuclear power station reactor protection tube assembly transportation platform - Google Patents
Centering guide system of nuclear power station reactor protection tube assembly transportation platform Download PDFInfo
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- CN217061458U CN217061458U CN202122973826.4U CN202122973826U CN217061458U CN 217061458 U CN217061458 U CN 217061458U CN 202122973826 U CN202122973826 U CN 202122973826U CN 217061458 U CN217061458 U CN 217061458U
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- centering
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Abstract
The utility model belongs to the technical field of nuclear power station reactor maintenance, in particular to a centering guide system of a nuclear power station reactor protection tube component transportation platform, which improves the structural strength and the anti-deformation capability of a lifting wrench; the diameter of the handle is increased, and the deformation resistance is improved; the rotating radius of the handle is properly reduced, and the handle and the neutron temperature measurement channel measurement pipe are prevented from being extruded and collided in the operation process.
Description
Technical Field
The application belongs to the technical field of nuclear power station reactor maintenance, and particularly relates to a centering guide system of a nuclear power station reactor protection tube component transportation platform.
Background
A nuclear power plant reactor, comprising: the reactor comprises a reactor pressure vessel, a reactor core hanging basket, a reactor core enclosing plate, a protection pipe assembly, a fuel assembly, a control rod assembly, an upper assembly, a protection steel structure, a control rod driving mechanism and the like. In order to maintain the troublesome normal operation of the reactor and provide continuous energy for the steam turbine generator unit, a new fuel assembly needs to be periodically supplemented to the reactor, and a spent fuel assembly needs to be removed.
In order to achieve the purpose, all other auxiliary equipment of the nuclear power plant can normally operate, and the nuclear power unit needs to carry out preventive overhaul work regularly. In the process of carrying out preventive overhaul work of the reactor body, the dismantling of the protection tube assembly is one of the key hoisting operation activities. The hoisting risk of the work is high, and an underwater hoisting process needs to be executed. The hoisting of the protection pipe assembly is completed by using a special protection pipe assembly transportation platform.
The main functions of the protection tube assembly transportation platform are as follows:
the protective pipe assembly transportation platform is connected with the protective pipe assembly body through 6 pull rods at the lower part, so that the hoisting work is realized; the protective pipe assembly transportation platform is provided with a centering guide system which is matched with guide rails on a reactor core vertical shaft and a protective pipe assembly inspection well, so that centering positioning of the protective pipe assembly on the reactor core and the protective pipe assembly inspection well during installation and disassembly is realized, and accurate positioning is ensured; the protection tube component transportation platform is provided with a pore channel for fixing 54 groups of reactor core neutron-temperature measuring tubes, so that 54 reactor core neutron-temperature measuring tubes are smoothly inserted to the installation position and lifted to the transportation position; 4 hoisting stand columns are arranged on the protective pipe assembly transportation platform and connected with the ring crane through the hoisting crossbeam of the upper assembly, so that hoisting work is realized.
The centering guide system of protection tube subassembly transport platform includes: guide bracket, worm gear subassembly, transfer line, lifting spanner. The action principle is as follows: the lifting wrench lifts or descends the guide bracket through the transmission rod and the worm and gear assembly, so that the guide bracket can slide up and down in the guide rail in the reactor core vertical shaft and the inspection well of the protection pipe assembly, and has the functions of centering and positioning.
In the process of hoisting the protection tube assembly in actual execution on an overhaul field, the guide bracket in the protection tube assembly centering guide system needs to be rotated from a vertical state to a horizontal state so as to be convenient for the guide bracket to slide up and down in a guide rail in a vertical shaft, and the centering and positioning effect is achieved. Therefore, the lifting wrench needs to be rotated, the rotating torque is transmitted to the upper worm wheel through the transmission rod and then transmitted to the guide bracket through the worm and gear combination, and the guide bracket can swing to a vertical state or a horizontal state.
Because the lifting handle design diameter is less, under the condition that takes place great deformation, the guide bracket just can realize swinging to vertical condition or horizontality, and moment transmission efficiency is low, and this position ambient temperature is higher relatively in addition, has proposed higher requirement to maintenance survey crew's physical stamina. The conventional lifting wrench collides with 54 neutron temperature measurement channel tubes in the operation process, so that the neutron temperature measurement channel tubes are easily separated from the bracket and fall off. In the long-term use process of the guide lifting wrench of the protective pipe assembly transportation platform, a lifting handle in the lifting wrench is easy to deform. The condition that the lifting handle of the protection tube assembly transportation platform for guiding the lifting wrench is broken due to excessive force on the overhaul site is also generated, the broken handle falls on the edges of the holes of the cluster support frame of 54 neutron temperature measurement channels of the reactor core protection tube assembly, and foreign matter events are caused dangerously. In order to find the foreign matter, the major repair main line key path is delayed for a long time, and great potential safety hazards are brought to the repair work.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a nuclear power station reactor protection tube subassembly transport platform's centering guide system solves protection tube subassembly transport platform direction and promotes the problem that the promotion handle of spanner is very easily taken place to warp, very easily cracked.
The technical scheme for realizing the purpose of the application is as follows:
the embodiment of the application provides a centering guidance system of nuclear power station reactor protection tube subassembly transportation platform, centering guidance system includes: the lifting wrench, the transmission rod, the worm and gear assembly and the guide bracket;
wherein, promote the spanner, include: an intermediate positioning member, a circular member, and a plurality of lifting handles;
one end of each lifting handle is fixed on the middle positioning piece, and the other end of each lifting handle is fixed on the circular piece;
the middle positioning piece is connected with the worm gear assembly through the transmission rod, and the worm gear assembly is further connected with the guide tray.
Alternatively to this, the first and second parts may,
the middle positioning piece is of a circular structure, and the diameter of the circular piece is larger than that of the middle positioning piece.
In the alternative,
the middle positioning piece is of a cylindrical structure, and a key groove is formed in the middle of the middle positioning piece;
the key groove is used for being matched with the transmission rod to realize transmission of rotating torque from the lifting wrench to the transmission rod.
Optionally, the lifting wrench further includes: positioning pins;
the middle positioning piece is provided with a positioning hole for inserting the positioning pin;
and the positioning hole is used for positioning the lifting wrench by utilizing the positioning pin when the guide bracket is swung to a position required by work.
In the alternative,
the lifting handle is connected with the middle positioning piece in a welding mode.
Alternatively to this, the first and second parts may,
the number of the lifting handles is five;
five lifting handles are uniformly distributed and fixed on the middle positioning piece.
Optionally, the centering and guiding system further includes: an F-shaped wrench;
the F-shaped wrench is used for applying a rotating torque to the round piece or the lifting handle so as to drive the guide bracket to swing.
The beneficial technical effect of this application lies in:
(1) the embodiment of the application provides a centering guide system of a nuclear power station reactor protection tube component transportation platform, which is provided with 5 lifting handles, 1 handle is added compared with the original tools, and the structural strength and the deformation resistance of a lifting wrench are improved; the diameter of the handle is increased, and the deformation resistance is improved; the rotating radius of the handle is properly reduced, and the handle and the neutron temperature measurement channel measurement pipe are prevented from being extruded and collided in the operation process.
(2) The embodiment of the application provides a centering guide system of nuclear power station reactor protection tube subassembly transport platform, around the circular member that 5 promotion handle circumference were arranged, with 5 promotion handles fuse, in the operation process, 5 promotion handles transmit moment simultaneously, have promoted moment transmission efficiency, have reduced personnel working time, have avoided breaking occur and foreign matter risk.
(3) The embodiment of the application provides a centering guide system of nuclear power station reactor protection tube subassembly transport platform has suitably increased around the thickness of the circular member that 5 promotion handle circumference were arranged, promotes its structural strength and anti deformability, also is convenient for carry out the rotation operation under the supplementary cooperation of F type spanner, has promoted the operating efficiency greatly.
Drawings
Fig. 1 is a schematic structural diagram of a centering and guiding system of a transport platform for a reactor protection tube assembly in a nuclear power plant according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a lifting wrench in a centering and guiding system of a transport platform for a reactor protection tube assembly in a nuclear power plant according to an embodiment of the present application.
In the figure:
1-lifting a wrench; 11-an intermediate positioning element; 12-a circular piece; 13-lifting a handle; 14-a keyway; 15-positioning holes;
2-a transmission rod;
3-a worm gear assembly;
4-guiding the bracket.
Detailed Description
In order to make the technical solutions in the embodiments of the present application more comprehensible to those skilled in the art, the following description will be made in detail and completely with reference to the accompanying drawings in the embodiments of the present application. It should be apparent that the embodiments described below are only some of the embodiments of the present application, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments described herein without inventive step, are within the scope of the present application.
The inventor of the application is based on the prior art problem, according to overhauing on-the-spot actual space environment and space size, combine on the protection tube subassembly transport platform centering guide system to promote spanner mounted position, and survey the interval of pipe with 54 neutron temperature measurement passageway, the analysis is not enough of promoting the spanner now, brand-new design development nuclear power station reactor protection tube subassembly transport platform's centering guide system, solve the problem that exists in the use of current promotion spanner and on-the-spot maintenance space equipment interfere, increase promotion handle diameter size, non-deformable, will promote moment transmission efficiency greatly, reduce personnel dwell time under high temperature environment, overhaul thread key path operating time has been practiced thrift. Meanwhile, the physical consumption of personnel is reduced, more importantly, the risk of foreign matters broken by the handle is effectively avoided, and the safety of hoisting operation of the reactor core protection tube assembly is improved.
The embodiment of the application provides a pair of nuclear power station reactor protection tube subassembly transport platform's centering guide system, with a plurality of lifting handle integrations, connect through the circular member, improve its structural strength, improved handle anti deformability promptly, also avoided the handle condition of breaking, suitably dwindle lifting wrench handle diameter on this basis, avoid taking place to extrude and collide with neutron temperature measurement passageway survey buret in the operation process. The embodiment of the application provides a lifting wrench can personnel manual operation among nuclear power station reactor protection tube subassembly transport platform's centering guidance system, also can be through F spanner auxiliary operation, has effectively promoted turning torque transmission efficiency, has shortened personnel working hours.
Based on the above, in order to clearly and specifically explain the above advantages of the present application, the following description of the embodiments of the present application will be made with reference to the accompanying drawings.
Referring to fig. 1, the drawing is a schematic structural diagram of a centering and guiding system of a transport platform for a reactor protection tube assembly of a nuclear power plant according to an embodiment of the present application.
The embodiment of this application provides a centering guidance system of nuclear power station reactor protection tube subassembly transportation platform includes: the lifting wrench 1, the transmission rod 2, the worm and gear assembly 3 and the guide bracket 4;
wherein, promote spanner 1, include: an intermediate positioning member 11, a circular member 12 and a plurality of lifting handles 13;
one ends of a plurality of lifting handles 13 are fixed to the intermediate positioning member 11, and the other ends of the plurality of lifting handles 13 are fixed to the circular member 12;
the middle positioning piece 11 is further connected with the worm and gear assembly 3 through the transmission rod 2, and the worm and gear assembly 3 is further connected with the guide tray 4.
It will be appreciated that the operator can apply a rotational torque by rotating the body of the lifting handle 13 to bring the guide bracket 4 down to the working position or up to the transport position.
In some possible implementations of the embodiment of the present application, as shown in fig. 2, the intermediate positioning member 11 may have a circular structure, and the diameter of the circular member 12 is larger than that of the intermediate positioning member 11.
In one example, the middle positioning member 11 is a cylindrical structure, and a key groove 14 is arranged in the middle;
a key slot 14 for cooperation with the drive rod 2 for enabling the transfer of a rotational torque from the lifting wrench 1 to the drive rod 2.
In one example, the lifting wrench 1 further includes: positioning pins;
the middle positioning piece 11 is provided with a positioning hole 15 for inserting a positioning pin;
and a positioning hole 15 for positioning the lifting wrench 1 by using a positioning pin when the guide bracket 4 is swung to a position required for operation, thereby preventing malfunction.
In some possible implementation manners of the embodiment of the application, the lifting handle 13 is connected with the middle positioning piece 11 in a welding manner, so that the deformation resistance of the lifting handle 13 is improved, and the important function is exerted on the overall structural strength of the lifting guide lifting wrench 1.
As an example, as shown in fig. 2, the number of the lifting handles 13 is five;
five lifting handles 13 are uniformly distributed and fixed on the middle positioning piece 11.
In some possible implementation manners of the embodiment of the present application, the centering and guiding system further includes: an F-shaped wrench;
an F-wrench, for applying a rotational torque to the circular member 12 or the lifting handle 13, thereby causing the guide bracket 4 to swing.
In practice, an F-wrench operating round 12 or lifting handle 13 may be used to apply torque to the drive rod, thereby causing the guide bracket 4 to swing.
The following describes a specific operation method of a centering and guiding system of a transport platform of a reactor protection tube assembly in a nuclear power plant in detail with reference to a specific example.
The specific operation method of the centering and guiding system of the nuclear power station reactor protection tube component transportation platform provided by the embodiment of the application is as follows:
(1) the lifting wrench 2 is rotated clockwise, torque is transmitted to the guide bracket 4 through the transmission rod 2 and the worm gear assembly 3, the guide bracket 4 is opened from a vertical transportation position and swings to a horizontal working position, and the working performance of the lifting wrench 1 and the stability and torque transmission efficiency of the guide bracket 4 in the swinging process are improved;
(2) rotating the lifting wrench 1 anticlockwise, transmitting torque to the guide bracket 4 through the transmission rod 2 and the worm and gear assembly 3, starting lifting the guide bracket 4 from a horizontal working position until the guide bracket 4 swings to a vertical transportation position, and improving the working performance of the lifting wrench 1 and the stability and torque transmission efficiency of the guide bracket 4 in the swinging process;
(3) checking the stability and the torque transmission efficiency of the swing process of the guide bracket 4 by using an F-shaped wrench according to the steps (1) and (2);
(4) before protection tube subassembly hoist and mount work begins at every turn, should all inspect lifting wrench 1, inspect simultaneously 4 action stability of guide bracket and moment transmission efficiency.
According to the centering guide system of the nuclear power station reactor protection tube component transportation platform, through multiple practical verifications in a reactor maintenance work site, the swinging of the guide bracket is well completed, the labor efficiency and the safety of hoisting work are greatly improved, the problem that the transmission efficiency of an original lifting handle is low is solved, and the working time of a key path of an overhaul main line is saved; by properly reducing the design length of the handle, the handle is prevented from colliding with the measuring tubes of 54 neutron temperature measuring channels in the circumferential rotation process, the circumferential rotation action of the lifting handle is kept continuous, and the operation efficiency is improved; connect into a whole with 5 promotion handles through circular member 1 in the promotion spanner of new development, improved the holistic structural strength of direction promotion spanner, avoided personnel breaking occur condition in the operation, and then avoided causing the great foreign matter incident, can popularize and apply in the relevant work of the unit of the same type, can promote to other similar equipment in power station on, also have good reference meaning to the instrument development work of other similar equipment with the trade.
The present application has been described in detail with reference to the drawings and examples, but the present application is not limited to the above examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application. The prior art can be used for all the contents which are not described in detail in the present application.
Claims (7)
1. A centering guidance system of nuclear power station reactor protection tube subassembly transportation platform, its characterized in that, centering guidance system includes: the lifting wrench, the transmission rod, the worm and gear assembly and the guide bracket;
wherein, promote the spanner, include: an intermediate positioning member, a circular member, and a plurality of lifting handles;
one end of each lifting handle is fixed on the middle positioning piece, and the other end of each lifting handle is fixed on the circular piece;
the middle positioning piece is further connected with the worm and gear assembly through the transmission rod, and the worm and gear assembly is further connected with the guide tray.
2. The centering and guiding system for a transportation platform of a reactor protection tube assembly of a nuclear power plant as claimed in claim 1,
the middle positioning piece is of a circular structure, and the diameter of the circular piece is larger than that of the middle positioning piece.
3. The centering and guiding system of a transportation platform of a nuclear power plant reactor protection tube assembly according to claim 2,
the middle positioning piece is of a cylindrical structure, and a key groove is formed in the middle of the middle positioning piece;
the key groove is used for being matched with the transmission rod to realize transmission of rotating torque from the lifting wrench to the transmission rod.
4. The centering and guiding system of a transportation platform for a nuclear power plant reactor protection tube assembly as claimed in claim 3, wherein the lifting wrench further comprises: positioning pins;
the middle positioning piece is provided with a positioning hole for inserting the positioning pin;
and the positioning hole is used for positioning the lifting wrench by utilizing the positioning pin when the guide bracket is swung to a position required by work.
5. The centering and guiding system for a transportation platform of a nuclear power plant reactor protection tube assembly according to claim 1,
the lifting handle is connected with the middle positioning piece in a welding mode.
6. The centering and guiding system for a transportation platform of a nuclear power plant reactor protection tube assembly according to claim 1,
the number of the lifting handles is five;
five lifting handles are uniformly distributed and fixed on the middle positioning piece.
7. The centering and guiding system for a transportation platform of a reactor protection tube assembly of a nuclear power plant according to any one of claims 1 to 6, further comprising: an F-shaped wrench;
the F-shaped wrench is used for applying a rotating torque to the round piece or the lifting handle so as to drive the guide bracket to swing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122973826.4U CN217061458U (en) | 2021-11-30 | 2021-11-30 | Centering guide system of nuclear power station reactor protection tube assembly transportation platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122973826.4U CN217061458U (en) | 2021-11-30 | 2021-11-30 | Centering guide system of nuclear power station reactor protection tube assembly transportation platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217061458U true CN217061458U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122973826.4U Active CN217061458U (en) | 2021-11-30 | 2021-11-30 | Centering guide system of nuclear power station reactor protection tube assembly transportation platform |
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| Country | Link |
|---|---|
| CN (1) | CN217061458U (en) |
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2021
- 2021-11-30 CN CN202122973826.4U patent/CN217061458U/en active Active
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