CN109854527B - Locking shielding tool for shielding main pump - Google Patents
Locking shielding tool for shielding main pump Download PDFInfo
- Publication number
- CN109854527B CN109854527B CN201910088665.5A CN201910088665A CN109854527B CN 109854527 B CN109854527 B CN 109854527B CN 201910088665 A CN201910088665 A CN 201910088665A CN 109854527 B CN109854527 B CN 109854527B
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- shielding
- main pump
- locking
- tool
- positioning guide
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- 238000009434 installation Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 230000002285 radioactive effect Effects 0.000 description 6
- 238000011900 installation process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A locking and shielding tool for a shielding main pump belongs to the technical field of shielding main pump maintenance. The tool comprises a rotor locking mechanism, a hoisting mechanism and a shielding mechanism; the shielding mechanism is a base with a central hole, and the top and the periphery of the base are formed by shielding plates; the hoisting mechanism is arranged at the top of the shielding mechanism and is used for hoisting the shielding main pump in cooperation with the hoisting tool to lock the shielding tool; the rotor locking mechanism is arranged at the top of the shielding mechanism and in the central hole; the shielding mechanism is arranged on the main pump through a fastener, and the rotor locking mechanism is used for locking the rotor component under the condition that the shielding mechanism shields the high-radioactivity component. The invention can quickly install the shielding tool remotely, can well shield high radioactivity after installation, can facilitate the locking operation of the rotor under the shielding condition, and can effectively seal residual liquid.
Description
Technical Field
The invention belongs to the technical field of shielding type main pump maintenance, and particularly relates to a locking shielding tool for a shielding main pump.
Background
After the shielding main pump runs for a long time, the possibility of occurrence of problems of other parts such as a main pump thrust bearing, a shielding sleeve and the like is gradually increased, and the main pump replacement and maintenance process and tool development are very necessary in a radioactive environment. The shielding type main pump is adopted by a certain nuclear power main pump, the whole main pump is inversely hung at the bottom of the evaporator, after the damaged main pump is dismantled, high-radioactivity parts such as an impeller, a heat shield and the like are exposed, the subsequent working procedures such as locking of the rotor parts and mounting of a lifting appliance are seriously influenced, and the exposed high-radioactivity parts must be effectively shielded. The factors for finding out the restriction are mainly as follows through comprehensive analysis of the field working condition, the impeller and heat shield structure and the rotor component locking and hoisting process: 1. the pump body has a large weight, about 70T; 2. the radial positioning accuracy is high; 3. the shielding device is inconvenient to lock the rotor component after being installed; 4. the radioactive dose is very large (about mSv); 5. the radioactive residual liquid is difficult to seal in the transportation process. Therefore, the invention needs to provide a special lifting appliance which can be quickly installed remotely and can better shield high radioactivity, lock a rotor and seal residual liquid after installation, and lays a foundation for safely and effectively lifting and transferring a pump body to be replaced later.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the shielding main pump locking shielding tool which can be quickly installed remotely and can well shield high radioactivity, rotor locking and residual sealing liquid after installation in the shielding main pump replacement and overhaul process.
The invention is realized by the following technical scheme:
the invention discloses a shielding main pump locking shielding tool, which comprises a rotor locking mechanism, a hoisting mechanism and a shielding mechanism; the shielding mechanism is a base with a central hole, and the top and the periphery of the base are formed by shielding plates; the hoisting mechanism is arranged at the top of the shielding mechanism and is used for hoisting the shielding main pump in cooperation with the hoisting tool to lock the shielding tool; the rotor locking mechanism is arranged at the top of the shielding mechanism and in the central hole; the shielding mechanism is arranged on the main pump through a fastener, and the rotor locking mechanism is used for locking the rotor component under the condition that the shielding mechanism shields the high-radioactivity component.
Preferably, the rotor locking mechanism comprises a rotor locking disc and a rotor locking bolt assembly; the rotor locking disc is installed in a central hole of the shielding mechanism, and the rotor locking bolt assembly is inserted into the rotor locking disc and used for being screwed into the main pump impeller after the shielding mechanism is installed on the main pump.
Preferably, the hoisting mechanism comprises a hanger and a lifting lug; the hanging bracket is arranged at the top of the base station, and a spacing distance is reserved between the hanging bracket and the base station; the lifting lugs are arranged on the upright posts on two sides of the base station.
Preferably, the shielding mechanism is a base with a column on one side; an upper shielding plate is arranged on the circumference of the upper part of the base, and a lower shielding plate is arranged on the circumference of the lower part of the base; and a spacing distance is reserved between the upper shielding plate and the lower shielding plate.
Preferably, the shielding plate is made of double-layer hollow stainless steel plates, and the hollow part of the shielding plate is plumbed.
Preferably, the center hole of the base is provided with a seal ring near the inner circumference of the main pump.
Preferably, the abutment central bore has a slope adjacent to an inner circumference of the main pump for guiding the shielding mechanism to be mounted on the main pump.
Preferably, the tool of the invention further comprises a positioning guide post and a positioning guide end cover; the lower shielding plate is axially provided with a guide through hole; the positioning guide column and the positioning guide end cover are provided with assembly through holes; the positioning guide post is accommodated in the guide through hole and extends out of the guide through hole so as to radially position and shield the installation position of the main pump locking shielding tool on the main pump; the positioning guide end cover is arranged above the positioning guide column and positioned at the end part of the guide through hole, and the fastening piece sequentially penetrates through the positioning guide end cover and the positioning guide column to install the shielding mechanism on the main pump.
Preferably, the inner diameter of the part of the positioning guide post extending into the guide through hole is smaller than the inner diameter of the part of the positioning guide post extending into the main pump flange bolt hole.
Preferably, a chute is arranged at the lower part of the positioning guide end cover.
The invention has the following beneficial effects:
the locking shielding tool for the shielding main pump can be quickly installed remotely, can better shield high radioactivity after being installed, can quickly complete the installation and the disassembly of the shielding tool, can lock rotor components after the installation of the shielding tool, and can effectively seal residual liquid. The tool of the invention effectively reduces the radioactive dose of operators, greatly improves the maintenance efficiency, and lays a foundation for the subsequent overturning and transportation of the pump shell.
Drawings
FIG. 1 is a schematic perspective view of a locking shielding tool for a shielding main pump according to the present invention;
FIG. 2 is a schematic view of a hanger structure of the lifting mechanism of FIG. 1;
fig. 3 is a schematic view of a lifting lug structure of the lifting mechanism in fig. 1;
FIG. 4 is a schematic view of a rotor lock disk configuration of the rotor lock mechanism of FIG. 1;
FIG. 5 is an assembly schematic view of the rotor lock disk assembly rotor lock bolt assembly of FIG. 4;
FIG. 6 is a schematic perspective view of the shielding mechanism of FIG. 1;
FIG. 7 is an enlarged schematic view of the bottom of the shielding mechanism of FIG. 6;
FIG. 8 is a schematic diagram of a seal configuration for shielding a primary pump locking shielding tool according to the present invention;
FIG. 9 is a schematic view of a positioning guide post and a positioning guide end cap of the present invention when a shielding main pump locking shielding tool is installed on a main pump;
fig. 10 is a schematic structural view of a shielding tool for shielding the locking of a main pump after being assembled with the main pump.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
A shielding main pump locking and shielding tool comprises a rotor locking mechanism, a hoisting mechanism and a shielding mechanism. The shielding mechanism is a base with a central hole, and the top and the periphery of the base are formed by shielding plates. The hoisting mechanism is arranged at the top of the shielding mechanism and is used for being matched with a hoisting tool, such as a crane, and hoisting and shielding a main pump to lock the shielding tool to a proper operation position. The rotor locking mechanism is mounted on top of the shielding mechanism and in the central bore. The shielding mechanism is arranged on the main pump through a fastener, and the rotor locking mechanism is used for locking the rotor component under the condition that the shielding mechanism shields the high-radioactivity component. According to the invention, the shielding mechanism is provided with the hoisting mechanism, so that the shielding tool can be conveniently and remotely installed on the main pump; and set up rotor locking mechanism on shielding tool, can remove under hoist and mount mechanism hoist and mount removal along with shielding mechanism, once shielding mechanism installs on the main pump, the radioactivity of the water conservancy part position of whole main pump has been basic shielding, and the operation personnel can closely be close to the operation, and available rotor locking mechanism locks rotor part.
As shown in fig. 1, 4 and 5, the rotor locking mechanism comprises a rotor locking disk 1 and a rotor locking bolt assembly 2. The rotor locking disc 1 is arranged in a central hole 13 of the shielding mechanism, and the rotor locking bolt assembly 2 is inserted into the rotor locking disc 1 and is used for screwing the shielding mechanism into the main pump impeller after being arranged on the main pump. The rotor locking disc 1 is provided with bolt holes 12, the rotor locking bolt assemblies are a plurality of fasteners consisting of bolts and screws, and the rotor bolt assemblies are inserted into the bolt holes of the rotor locking disc 1.
As shown in fig. 1 and 6, the shielding mechanism is a base 5 having a pillar 6 provided on a peripheral side. Preferably, four upright posts 6 are symmetrically distributed on the peripheral side of the base 5. The top of base 5 is equipped with top shield plate 53, the circumference is equipped with shield plate 51 on the base 5 upper portion, the circumference is equipped with shield plate 52 down on the base 5 lower portion. The shielding plates are all made of double-layer hollow stainless steel plates, lead is poured into the hollow parts of the shielding plates, and the radiation dose of water conservancy components can be effectively shielded. In the design and installation process, the optimized materials can be selected according to the radiation shielding performance and specific gravity of different materials. Wherein, a space is left between the upper shielding plate 51 and the lower shielding plate 52, which facilitates the installation of the shielding mechanism on the main pump through a fastener. Further facilitating the installation of the fasteners, the upper shielding plate 51 is arranged in a flat plate shape and divided into a plurality of pieces to be arranged around the circumference of the upper part of the base, and the lower shielding plate 52 is arranged in an arc shape and divided into a plurality of pieces to be arranged around the circumference of the lower part of the base. So that the upper shield plate 51 does not block the fastener assembly.
As shown in fig. 1, 2 and 3, the lifting mechanism comprises a lifting frame 3 and lifting lugs 4. The hanging bracket 3 is arranged at the top of the base station 5, and a spacing distance is reserved between the hanging bracket and the base station 5, so that an operator can conveniently operate, for example, the rotor locking bolt assembly is controlled to screw in and screw out of the main pump impeller, and the lifting lug 4 is arranged on the upright posts 6 at two sides of the base station 5. Specifically, the hanger 3 includes a mounting portion and a main body portion 32. The main body 32 is arranged above the rotor locking plate 1 and is spaced from the rotor locking plate. The main body 32 is attached to the top of the base 5 by the attachment portion. Preferably, the mounting part is mounted and connected with the base station through four-point positioning. As can be seen, the hanger body portion 32 is cross-shaped and the mounting portions are four mounting sections, each extending outwardly from a cross-shaped leg of the body portion. The mounting sections have two first mounting sections 311 symmetrically distributed and two second mounting sections 312 symmetrically distributed. The four mounting sections are respectively mounted on four upright posts 6 on the periphery side of the base. The first mounting portion 311 has a mounting hole and is fixed to the column 6 by a screw. The second mounting portion 312 is provided with a U-shaped opening, so that the second mounting portion 312 has two branch portions, the two branch portions are inserted into the slots 61 on the upright post 6, the side surfaces of the two branch portions are respectively provided with a mounting hole, and the second mounting portion is fixedly connected with the upright post by penetrating through the mounting holes through bolts. The lifting lug 4 comprises an assembling part and a lifting ring part 42, wherein the assembling part comprises an end part and a columnar body, and the lifting lug is fixed on the upright post through bolts by extending the columnar body into the through hole 62 of the upright post. Wherein, the inner diameter of the columnar body 412 is smaller than the end 411, and the inner diameter of the end 411 is larger than the radial dimension of the through hole of the upright post 6. The hanging ring part 42 is fixed on the end part of the assembly part, so that the hanging tool is convenient to hang.
In order to facilitate the accurate positioning and installation of the locking shielding tool for shielding the main pump on the main pump, the center hole of the base station 5 is provided with a slope close to the inner circumference of the main pump, and the guiding shielding mechanism is arranged on the main pump. That is, the radial dimension of the inner circumference becomes smaller near the main pump, like a tapered structure, facilitating the guide mounting on the main pump. In addition, the rotor locking disk 1 is provided with a disk spigot 11 (refer to fig. 5), the bottom of the base 5 of the shielding mechanism is also provided with a base spigot 51 (refer to fig. 7), and the disk spigot 11 is matched with the base spigot 51 to form a concave-convex structure, so that the shielding main pump locking shielding tool is conveniently positioned and installed on the main pump.
In order to further improve the positioning accuracy, the shielding main pump locking shielding tool also comprises a positioning guide post 7 and a positioning guide end cover 8. The lower shielding plate 52 is axially provided with guide through holes 521, the number and positions of the guide through holes are adapted according to the assembly holes of the flange surface of the main pump, for example, the lower shielding plates 52 on two sides of the upright posts in the figure are respectively provided with guide through holes, and eight guide through holes are arranged under the four upright posts. The positioning guide post 7 and the positioning guide end cover 8 are provided with assembly through holes 71 and 81. The positioning guide post 7 is accommodated in the guide through hole 521 and extends out of the guide through hole 521 to radially position and shield the installation position of the main pump locking shielding tool on the main pump. The positioning guide end cover 8 is arranged above the positioning guide column 7 and is positioned at the end part of the guide through hole 521, and the fastening piece, such as a super bolt or a long screw, sequentially passes through the positioning guide end cover 8 and the positioning guide column 7 to install the shielding mechanism on the main pump 10. Wherein, the positioning guide end cover 8 comprises a cover cap and a cylinder arranged at the bottom of the cover cap. The inner diameter of the cap is larger than the inner diameter of the guide through hole 521, and the inner diameter of the cylinder is equal to the inner diameter of the guide through hole 521. The inner diameter of the part of the positioning guide column 7 extending into the guide through hole 521 is smaller than the inner diameter of the part of the positioning guide column 7 extending into the main pump flange bolt hole. To facilitate the installation of the positioning guide post 7, the lower part of the positioning guide end cover 8 is provided with a chute (not shown in the figure), i.e. the end of the post is provided with a chute.
In addition, in order to improve the tightness of the radioactive residual liquid, a sealing ring 14, such as an O-ring, is provided near the inner circumference of the main pump 10 at the center hole of the base 5.
The rotor lock mechanism is first installed in the center hole of the shielding mechanism in the low dose hoisting area, and a rotor lock bolt assembly (7 rotor lock bolts are shown in the figure) is inserted into the bolt holes of the rotor lock disk 1. And then the hanging bracket and the lifting lug are arranged on the shielding mechanism. After the shielding hanger is lifted to a proper height by a crane, a detachable positioning guide post 7 and a positioning guide end cover 8 are arranged at the position where a fastener, such as a long screw, is arranged on the shielding hanger. An O-shaped sealing ring 14 is arranged on the inner circle of the shielding lifting appliance. Then, the shielding sling is moved to the position right above the main sling 10 and slowly falls down, and radial positioning is accurately performed through the positioning guide column 7 and the positioning guide end cover 8. The positioning process is specifically as follows: after the positioning guide post 7 is installed, the positioning guide end cover 8 is installed in the guide through hole 521 of the shielding tool, the shielding tool is adjusted in a rotating mode, when the guide through hole of the shielding tool and the bolt hole of the flange face of the main pump main bolt are on the same central line, the threaded holes of the guide through hole of the shielding tool and the flange face of the main pump main bolt are on the same line, and then a fastener such as a super bolt or a long screw is screwed in from the guide through hole 521 such as the threaded hole, and the guide through hole and the main pump main bolt are connected. After the shielding lifting appliance is in place, the radioactivity of the position of the water conservancy component of the whole main pump is basically shielded, and operators can work close to the main pump in a short distance; through the operation platform, the operation personnel screw in the bolt hole at main pump impeller top with the rotor locking bolt to progressively lift the rotor, finally make the impeller lift to contact with the stator. The positioning guide column 7 and the positioning guide end cover 8 are removed, and the main pump shell of the shielding lifting appliance is flanged by using super bolts or long screws (see fig. 10). The shielding mechanism and the rotor locking mechanism are organically combined, so that an operator can avoid receiving excessive radioactive doses caused by close-range operation in the process of locking the rotor component in the installation process; in the process of disassembling the biological shielding plugging plate, the process is carried out in the reverse order of the installation process.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.
Claims (7)
1. The main shielding pump locking and shielding tool is characterized by comprising a rotor locking mechanism, a hoisting mechanism, a shielding mechanism, a positioning guide column and a positioning guide end cover; the shielding mechanism is a base with a central hole, and the top and the periphery of the base are formed by shielding plates; the hoisting mechanism is arranged at the top of the shielding mechanism and is used for hoisting the shielding main pump in cooperation with the hoisting tool to lock the shielding tool; the rotor locking mechanism is arranged at the top of the shielding mechanism and in the central hole; the shielding mechanism is arranged on the main pump through a fastener, and the rotor locking mechanism is used for locking the rotor component under the shielding of the high-radioactivity component by the shielding mechanism; the rotor locking mechanism comprises a rotor locking disc and a rotor locking bolt assembly; the rotor locking disc is arranged in a central hole of the shielding mechanism, and the rotor locking bolt assembly is inserted into the rotor locking disc and is used for screwing the shielding mechanism into the main pump impeller after being arranged on the main pump; the shielding mechanism is a base platform with a column at one side; an upper shielding plate is arranged on the circumference of the upper part of the base, and a lower shielding plate is arranged on the circumference of the lower part of the base; a spacing distance is reserved between the upper shielding plate and the lower shielding plate; the lower shielding plate is axially provided with a guide through hole; the positioning guide column and the positioning guide end cover are provided with assembly through holes; the positioning guide post is accommodated in the guide through hole and extends out of the guide through hole so as to radially position and shield the installation position of the main pump locking shielding tool on the main pump; the positioning guide end cover is arranged above the positioning guide column and positioned at the end part of the guide through hole, and the fastening piece sequentially penetrates through the positioning guide end cover and the positioning guide column to install the shielding mechanism on the main pump.
2. The shielding main pump locking shielding tool of claim 1, wherein the lifting mechanism comprises a hanger and a lifting lug; the hanging bracket is arranged at the top of the base station, and a spacing distance is reserved between the hanging bracket and the base station; the lifting lugs are arranged on the upright posts on two sides of the base station.
3. The shielding main pump locking shielding tool of claim 1, wherein the shielding plate is made of a double-layered hollow stainless steel plate, and the hollow portion of the shielding plate is plumbed.
4. The shielding main pump locking shielding tool according to claim 1, wherein the abutment center hole is provided with a sealing ring near an inner circumference of the main pump.
5. The shielding main pump lock shielding tool of claim 1, wherein the abutment central bore has a taper near an inner circumference of the main pump for guiding the shielding mechanism mounted on the main pump.
6. The shielding main pump locking shielding tool according to claim 1, wherein an inner diameter of the portion of the positioning guide post extending into the guide through hole is smaller than an inner diameter of the portion of the positioning guide post extending into the main pump flange bolt hole.
7. The shielding main pump locking shielding tool according to claim 1, wherein the lower portion of the positioning guide end cover is provided with a chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088665.5A CN109854527B (en) | 2019-01-30 | 2019-01-30 | Locking shielding tool for shielding main pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088665.5A CN109854527B (en) | 2019-01-30 | 2019-01-30 | Locking shielding tool for shielding main pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109854527A CN109854527A (en) | 2019-06-07 |
| CN109854527B true CN109854527B (en) | 2023-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910088665.5A Active CN109854527B (en) | 2019-01-30 | 2019-01-30 | Locking shielding tool for shielding main pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN109854527B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111112960B (en) * | 2020-01-20 | 2021-01-22 | 三门核电有限公司 | Device and process for replacing locking cup at lower part of large shielding main pump |
| CN111112939B (en) * | 2020-01-20 | 2021-01-15 | 三门核电有限公司 | Rotor support locking device for online maintenance of large-scale shielding main pump and operation process |
| CN113526323B (en) * | 2021-07-02 | 2022-04-08 | 哈尔滨电气动力装备有限公司 | Nuclear main pump multi-component combined hoisting method |
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|---|---|---|---|---|
| CN103095023A (en) * | 2013-01-16 | 2013-05-08 | 大连理工大学 | A sealing structure for high pressure gapless attachment in the stator shielding sleeve of the nuclear main pump |
| KR101608487B1 (en) * | 2015-06-19 | 2016-04-01 | 동원펌프주식회사 | a stand for pump to a adjustable height |
| CN205331003U (en) * | 2016-01-25 | 2016-06-22 | 常州雷利电机科技有限公司 | Shielding formula is rotor subassembly for electronic pump |
| CN108412783A (en) * | 2017-02-10 | 2018-08-17 | 国核电站运行服务技术有限公司 | Nuclear power shielding main pump dismounting process test-bed |
| CN108673417A (en) * | 2018-07-03 | 2018-10-19 | 三门核电有限公司 | A kind of shielding main pump kingbolt dismantling device and assembly and disassembly methods |
-
2019
- 2019-01-30 CN CN201910088665.5A patent/CN109854527B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095023A (en) * | 2013-01-16 | 2013-05-08 | 大连理工大学 | A sealing structure for high pressure gapless attachment in the stator shielding sleeve of the nuclear main pump |
| KR101608487B1 (en) * | 2015-06-19 | 2016-04-01 | 동원펌프주식회사 | a stand for pump to a adjustable height |
| CN205331003U (en) * | 2016-01-25 | 2016-06-22 | 常州雷利电机科技有限公司 | Shielding formula is rotor subassembly for electronic pump |
| CN108412783A (en) * | 2017-02-10 | 2018-08-17 | 国核电站运行服务技术有限公司 | Nuclear power shielding main pump dismounting process test-bed |
| CN108673417A (en) * | 2018-07-03 | 2018-10-19 | 三门核电有限公司 | A kind of shielding main pump kingbolt dismantling device and assembly and disassembly methods |
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| CN109854527A (en) | 2019-06-07 |
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