CN109638695B - Nuclear power station reactor main pump overhauls rack - Google Patents
Nuclear power station reactor main pump overhauls rack Download PDFInfo
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- CN109638695B CN109638695B CN201811517246.0A CN201811517246A CN109638695B CN 109638695 B CN109638695 B CN 109638695B CN 201811517246 A CN201811517246 A CN 201811517246A CN 109638695 B CN109638695 B CN 109638695B
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- layer
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- platform
- maintenance
- main pump
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- 238000012423 maintenance Methods 0.000 claims abstract description 45
- 230000007246 mechanism Effects 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of mechanical design, and particularly relates to a nuclear power station reactor main pump overhaul stand. The invention comprises a rack bottom layer, a rack first layer, a rack second layer, a rack third layer and stairs, wherein the rack first layer is fixedly arranged above the rack bottom layer and is fixed by a rack first layer fulcrum in a main support; the second layer of the rack is fixed through a main support middle rack second layer of a support flat plate, a support upright post is arranged above the second layer of the rack and used for fixing three layers of the rack, the whole maintenance rack is provided with an up-down passing function for maintenance staff through stairs. The invention can prevent the possibility of falling of personnel and objects and improve the safety of personnel and equipment.
Description
Technical Field
The invention belongs to the technical field of mechanical design, and particularly relates to a nuclear power station reactor main pump overhaul stand.
Background
The main pump of the reactor of the nuclear power station is nuclear-grade safety equipment and is key equipment related to normal operation of the reactor, so that the main pump of the reactor can be disassembled and overhauled each time the power station is overhauled. The disassembly maintenance work of the main reactor pump is mainly completed on the maintenance bench, and the main pump maintenance bench is mainly used for bearing the main reactor pump with the weight of 25 tons and simultaneously provides three layers of maintenance platforms for maintenance staff so as to meet the maintenance work of different heights of the main pump.
With the annual development of maintenance work, the maintainer realizes that current foreign maintenance rack can only satisfy the basic work that the main pump overhauld, and the main pump is located on the rack after, and the interval of main pump and maintenance platform is great, has personnel, instrument risk of falling, and the rack does not provide special radiation protection barrier, has the maintainer to receive the risk that the large dose shines.
Disclosure of Invention
The invention solves the technical problems that: in order to solve the problem that personnel and items possibly fall in the maintenance process of a main pump of a nuclear power station reactor and prevent maintenance personnel from being irradiated by radiation dose, the invention provides the maintenance rack for the main pump of the nuclear power station reactor, which can prevent the possibility of falling of the personnel and the items and improve the safety of the personnel and equipment.
The invention adopts the technical scheme that:
a nuclear power station reactor main pump overhauling rack comprises a rack bottom layer, a rack first layer, a rack second layer, a rack third layer and stairs, wherein the rack first layer is fixedly arranged above the rack bottom layer and is fixed by means of a rack first layer fulcrum in a main support; the second layer of the rack is fixed through a main support middle rack second layer of a support flat plate, a support upright post is arranged above the second layer of the rack and used for fixing three layers of the rack, the whole maintenance rack is provided with an up-down passing function for maintenance staff through stairs.
The first layer of rack includes steel bottom plate, bounding wall, flashboard, and open type shutoff space is constituteed to flashboard and steel bottom plate, bounding wall for collect the inside residual medium of equipment, after dismantling the flashboard, use special travelling bogie, the comparatively great equipment parts of impeller, heat shield of dismantlement in the main pump equipment maintenance process is transported from the bottom.
The rack one deck still includes revolving door, to opening the door, rack one deck rail bottom plate, and maintainer carries out maintenance operation in rack one deck rail bottom plate top, when important part need transport out and highly be greater than the limit for height from the rack bottom, opens the revolving door, to opening the door, realizes important part transportation function, and wherein, the revolving door top design is opened has the location pinhole, realizes effectively fixed with rack one deck rail bottom plate, and open the door back to opening has horizontal pinhole, strengthens the bearing capacity under the closed state of opening the door to, ensures maintainer and carries out the security of maintenance operation in rack one deck top.
The second layer of the overhaul stand comprises a guide chain transmission mechanism, a supporting main flange, a closing cover plate and a second layer of fence bottom plate of the stand; the main support flange is required to be leveled before being used, the leveling device is adjusted through adjusting the adjusting bolt, after maintenance equipment is placed steadily, equipment is disassembled and overhauled, a part to be maintained is placed on a specified maintenance site for inspection and maintenance, the main pump shaft and the impeller are still required to be vertically placed above the bench, at the moment, the overhaul opening of the two layers of the bench is required to be reduced, tools and personnel are prevented from being thrown down, and the process is realized through adjusting the guide chain transmission mechanism.
The hand wheel is rotated to drive the transmission gear, the transmission gear is driven to drive the driven gear through the chain, and the driven gear drives the closed cover plate to move along the direction of the driven gear shaft, so that the opening of the second layer of the rack is reduced.
The three layers of the overhaul stand comprise three layers of platform driving mechanisms, three layers of platform push-pull tables and three layers of platform driving cover plates; the manual runner of three-layer platform actuating mechanism is rotated, drives drive gear, and drive gear drives the gear, and the gear passes through chain drive, and drive gear box drives three-layer platform drive apron and opens and shuts the motion, reduces equipment and maintenance hole interval, stops tools and personnel and falls the risk.
The three-layer platform push-pull bedplate of the overhaul stand is in circular arc sliding, a U-shaped opening is formed at the three-layer platform of the overhaul stand, equipment can drive into the interior of the platform at a lower height position in the horizontal direction, the three-layer platform push-pull bedplate is put and fixed, and the three-layer platform push-pull bedplate is closed through push-pull, so that a circular overhaul area is formed.
The invention has the beneficial effects that:
1. the one-layer platform designs the roll-over door for the inlet and outlet channels of the main pump impeller trolley, and is simple, labor-saving and quick to operate.
2. The double-layer platform is provided with the double-layer 360-degree shielding layer sliding rail, so that the shielding layer can be conveniently moved, frequent hanging and taking of the shielding layer are avoided, the shielding effect is better, the safety is improved, and meanwhile, the manpower requirement is saved.
3. The translational opening and closing door is arranged on the two-layer platform, can be continuously closed inwards along with the development of the disassembly work of the main pump, reduces the distance between the two-layer platform and the main pump, is beneficial to the development of the disassembly work, and prevents the falling risk of operators and objects.
4. The leveling device for the bearing flange of the two-layer platform main pump has stable self-locking and fixing capabilities, avoids complicated work of leveling in each use, and is labor-saving, efficient and reliable.
5. The three-layer platform has three-layer hole sealing capability, completely avoids the risk of falling of personnel and objects in high altitude, and forms a whole after the primary sealing mechanism and the secondary sealing mechanism are completely sealed, thereby having better supporting capability and high safety margin.
6. The stair adopts a Z-shaped design, has moderate gradient and humanized design, is suitable for operators to climb, and is safe and labor-saving.
Drawings
FIG. 1 is a schematic diagram of a nuclear power station reactor main pump overhaul stand structure provided by the invention;
FIG. 2 is a schematic view of a main support of the platform;
FIG. 3 is a top view of the bottom layer of the gantry;
FIG. 4 is a top view of a layer of a gantry;
FIG. 5 is a side view of a main pump overhaul stand structure of a reactor;
FIG. 6 is a schematic diagram of a drive apparatus;
FIG. 7 is a schematic diagram of a closure flap mechanism;
FIG. 8 is a schematic diagram of a leveling device;
FIG. 9 is a schematic view of a support main flange;
FIG. 10 is a three-layer side view of the gantry;
FIG. 11 is a schematic diagram of a three-layer cover plate drive mechanism for a gantry;
FIG. 12 is a schematic diagram of a three-layer drive mechanism for a gantry;
FIG. 13 is a schematic view of a three-layer push-pull platform of a gantry;
in the figure: 1-rack bottom layer, 2-rack one layer, 3-rack two layer, 4-rack three layer, 5-stairs, 6-rack one layer pivot, 7-rack two layer support plate, 8-steel bottom plate, 9-coaming, 10-flashboard, 11-revolving door, 12-side by side door, 13-rack one layer fence bottom plate, 14-support upright post, 15-guide chain transmission mechanism, 16-support main flange, 17-closing cover plate, 18-rack two layer fence bottom plate, 19-transmission gear, 20-hand wheel, 21-adjusting bolt, 22-driven gear, 23-three layer platform driving mechanism, 24-three layer platform push-pull platen, 25-three layer platform driving cover plate, 26-hand wheel, 27-driving gear, 28-gear, 29-driving gear box
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples.
As shown in fig. 1, the main pump overhauling stand for the nuclear power station reactor provided by the invention comprises a stand bottom layer 1, a stand first layer 2, a stand second layer 3, a stand third layer 4 and stairs 5, wherein the stand first layer 2 is fixedly arranged above the stand bottom layer 1, is fixed by means of a stand first layer fulcrum 6 in the main support of fig. 2, the stand second layer 3 is fixed by a stand second layer supporting flat plate 7 in the main support of fig. 2, a supporting upright post 14 is arranged above the stand second layer 3 and used for fixing the stand third layer, and the whole overhauling stand is used for realizing the up-down passing function of overhauling staff by the stairs 5.
As shown in fig. 3, a layer of rack is composed of a steel bottom plate 8, a coaming 9 and a flashboard 10, wherein the flashboard 10, the steel bottom plate 8 and the coaming 9 form an open plugging space for collecting residual media in equipment, and after the flashboard 10 is disassembled, a special transportation trolley can be used for transporting major equipment components such as impellers, heat shields and the like disassembled in the main pump equipment maintenance process from the bottom layer.
As shown in fig. 4, the first layer of rack is composed of a revolving door 11, a side-by-side door 12 and a first layer of rack fence bottom plate 13, an maintainer can execute maintenance operation above the second layer of rack fence bottom plate 13, when important parts need to be transported out from the first layer of rack bottom plate 1 and the height is larger than the limit height, the revolving door 11 and the side-by-side door 12 can be opened to realize the important part transportation function, wherein a positioning pin hole is designed above the revolving door 11, the effective fixation with the first layer of rack fence bottom plate 13 can be realized, a transverse pin hole is opened at the back of the side-by-side door 12, the bearing capacity of the side-by-side door 12 in a closed state can be enhanced, and the safety of the maintenance operation executed above the first layer 2 of rack by the maintainer is ensured.
As shown in fig. 5, the second layer of the overhaul stand consists of a guide chain transmission mechanism 15, a supporting main flange 16, a closing cover plate 17 and a second layer of a fence bottom plate 18. Wherein, the main support flange 16 shown in fig. 9 needs to be leveled before use, and is adjusted through adjusting the adjusting bolt 21 of the leveling device shown in fig. 8, after the maintenance equipment is placed steadily, the equipment is disassembled and maintained, the maintenance parts are required to be placed on the appointed maintenance site for inspection and maintenance, the main pump shaft and the impeller still need to be vertically placed above the bench, at this time, the maintenance opening of the second layer 3 of the bench is required to be reduced, tools and personnel are prevented from throwing off, and the process can be realized by adjusting the guide chain transmission mechanism 15. The hand wheel 20 is rotated to drive the transmission gear 19, the transmission gear 19 is driven to drive the driven gear 22 through a chain, and the driven gear 22 drives the closed cover plate 17 to move along the axial direction of the driven gear 22, so that the opening of the two layers 3 of the rack is reduced.
As shown in fig. 10, the three layers of the maintenance rack are composed of a three-layer platform driving mechanism 23, a three-layer platform push-pull bedplate 24 and a three-layer platform driving cover plate 25. As shown in fig. 13, the push-pull platen 24 of the three-layer platform of the maintenance platform can slide in a circular arc shape, and a U-shaped opening is formed at the three-layer platform of the maintenance platform for equipment to travel into the platform at a lower height position in the horizontal direction and to be placed and fixed. The three-layer platform push-pull platen 24 is closed by push-pull to form a ring-mounted service area. The manual runner 26 of the three-layer platform driving mechanism 23 is rotated to drive the driving gear 27, the driving gear 27 drives the gear 28, the gear 28 drives the three-layer platform driving cover plate 25 to open and close through chain transmission, the distance between equipment and a maintenance hole is reduced, and the falling risk of tools and personnel is avoided.
Claims (4)
1. The utility model provides a nuclear power station reactor main pump overhauls rack which characterized in that: the novel multifunctional lifting platform comprises a platform bottom layer (1), a platform first layer (2), a platform second layer (3), a platform three layer (4) and stairs (5), wherein the platform first layer (2) is fixedly arranged above the platform bottom layer (1) and is fixed by means of a platform first layer supporting point (6) in a main support; the second layer (3) of the rack is fixed through a second layer supporting flat plate (7) of the rack in the main support, a supporting upright post (14) is arranged above the second layer (3) of the rack and used for fixing three layers of racks, the whole maintenance rack is inspected, and the up-down passing function of maintenance staff is realized through the stairs (5);
the first layer of the rack comprises a steel bottom plate (8), a coaming (9) and a flashboard (10), wherein the flashboard (10), the steel bottom plate (8) and the coaming (9) form an open plugging space for collecting residual media in equipment, and after the flashboard (10) is disassembled, special transportation trolleys are used for transporting equipment parts with relatively large impeller and heat shield disassembled in the main pump equipment maintenance process from the bottom layer;
the first layer of the rack further comprises a revolving door (11), a side-by-side door (12) and a first layer of rack bottom plate (13), an maintainer executes maintenance operation above the first layer of rack bottom plate (13), when important parts are required to be transported out from the bottom layer (1) of the rack and the height is larger than the limit height, the revolving door (11) and the side-by-side door (12) are opened, the important part transportation function is realized, a positioning pin hole is designed and arranged above the revolving door (11), the effective fixation with the first layer of rack bottom plate (13) is realized, a transverse pin hole is arranged at the back of the side-by-side door (12), the bearing capacity of the side-by-side door (12) in a closed state is enhanced, and the safety of the maintenance operation executed above the first layer (2) of the rack by the maintainer is ensured;
the second layer of the overhaul stand comprises a guide chain transmission mechanism (15), a supporting main flange (16), a closing cover plate (17) and a second layer fence bottom plate (18) of the stand; the main support flange (16) is required to be leveled before being used, the leveling device is adjusted through adjusting the adjusting bolt (21), after maintenance equipment is placed steadily, the equipment is disassembled and overhauled, maintenance parts are required to be placed on a specified maintenance site for inspection and maintenance, the main pump shaft and the impeller are still required to be vertically placed above the rack, at the moment, the overhaul opening of the two layers (3) of the rack is required to be reduced, tools and personnel are prevented from throwing off, and the process is realized through adjusting the guide chain transmission mechanism (15).
2. The nuclear power plant reactor main pump service rack of claim 1, wherein: the hand wheel (20) is rotated to drive the transmission gear (19), the transmission gear (19) is driven to drive the driven gear (22) through a chain, and the driven gear (22) drives the closed cover plate (17) to move along the axial direction of the driven gear (22) so as to reduce the opening of the two layers (3) of the rack.
3. The nuclear power plant reactor main pump service rack of claim 1, wherein: the three layers of the overhaul stand comprise a three-layer platform driving mechanism (23), a three-layer platform push-pull bedplate (24) and a three-layer platform driving cover plate (25); the manual rotating wheel (26) of the three-layer platform driving mechanism (23) is rotated to drive the driving gear (27), the driving gear (27) drives the gear (28), the gear (28) drives the three-layer platform driving cover plate (25) to open and close through chain transmission, the distance between equipment and a maintenance hole is reduced, and the falling risk of tools and personnel is avoided.
4. A nuclear power plant reactor main pump service rack as claimed in claim 3, wherein: the three-layer platform push-pull bedplate (24) of the overhaul stand is in circular arc sliding, a U-shaped opening is formed at the three-layer platform of the overhaul stand, equipment can be driven into the platform at a lower height position in the horizontal direction, the three-layer platform push-pull bedplate (24) is closed through push-pull, and a circular overhaul area is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517246.0A CN109638695B (en) | 2018-12-12 | 2018-12-12 | Nuclear power station reactor main pump overhauls rack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517246.0A CN109638695B (en) | 2018-12-12 | 2018-12-12 | Nuclear power station reactor main pump overhauls rack |
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| Publication Number | Publication Date |
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| CN109638695A CN109638695A (en) | 2019-04-16 |
| CN109638695B true CN109638695B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811517246.0A Active CN109638695B (en) | 2018-12-12 | 2018-12-12 | Nuclear power station reactor main pump overhauls rack |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110828014A (en) * | 2019-11-08 | 2020-02-21 | 中核核电运行管理有限公司 | Nuclear reactor maintenance mobile platform and using method thereof |
| CN112186605B (en) * | 2020-09-29 | 2022-09-13 | 国网山东省电力公司烟台供电公司 | Transformer maintenance platform with multiple installation modes |
| CN113954038B (en) * | 2021-10-09 | 2024-05-10 | 中核核电运行管理有限公司 | Automatic displacement adjusting device for main pump seal maintenance of nuclear power plant |
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| CN203895813U (en) * | 2014-05-27 | 2014-10-22 | 国家电网公司 | Power transformer equipment maintenance rack |
| CN104278864A (en) * | 2014-10-10 | 2015-01-14 | 北京铁道工程机电技术研究所有限公司 | Locomotive servicing work platform |
| CN106477069A (en) * | 2016-11-24 | 2017-03-08 | 广州飞机维修工程有限公司 | A kind of frontal windshield maintenance platform |
| CN207003973U (en) * | 2017-07-25 | 2018-02-13 | 广东核电合营有限公司 | A kind of fuel for nuclear power plant factory building service sink workbench |
| CN209402057U (en) * | 2018-12-12 | 2019-09-17 | 江苏核电有限公司 | A kind of nuclear power plant reactor main pump maintenance rack |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6856663B2 (en) * | 2002-02-20 | 2005-02-15 | General Electric Company | Reactor servicing platform |
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2018
- 2018-12-12 CN CN201811517246.0A patent/CN109638695B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203895813U (en) * | 2014-05-27 | 2014-10-22 | 国家电网公司 | Power transformer equipment maintenance rack |
| CN104278864A (en) * | 2014-10-10 | 2015-01-14 | 北京铁道工程机电技术研究所有限公司 | Locomotive servicing work platform |
| CN106477069A (en) * | 2016-11-24 | 2017-03-08 | 广州飞机维修工程有限公司 | A kind of frontal windshield maintenance platform |
| CN207003973U (en) * | 2017-07-25 | 2018-02-13 | 广东核电合营有限公司 | A kind of fuel for nuclear power plant factory building service sink workbench |
| CN209402057U (en) * | 2018-12-12 | 2019-09-17 | 江苏核电有限公司 | A kind of nuclear power plant reactor main pump maintenance rack |
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| CN109638695A (en) | 2019-04-16 |
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