CN112548927B - Special tool for dismounting manhole of horizontal high-pressure heater of nuclear power station - Google Patents
Special tool for dismounting manhole of horizontal high-pressure heater of nuclear power station Download PDFInfo
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- CN112548927B CN112548927B CN202011330537.6A CN202011330537A CN112548927B CN 112548927 B CN112548927 B CN 112548927B CN 202011330537 A CN202011330537 A CN 202011330537A CN 112548927 B CN112548927 B CN 112548927B
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- piece
- pressure heater
- manhole
- rotating arm
- plate
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- 210000004907 gland Anatomy 0.000 claims description 12
- 230000007306 turnover Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 15
- 238000010168 coupling process Methods 0.000 description 15
- 238000005859 coupling reaction Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/0028—Tools for removing or installing seals
-
- 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)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention belongs to a nuclear power maintenance detection technology, and particularly relates to a special tool for dismounting a manhole of a horizontal high-pressure heater of a nuclear power station, which comprises a rail combination piece, a bracket combination piece positioned below the rail combination piece, a travelling trolley combination piece which is arranged on the rail combination piece and can move back and forth, and a rotating arm combination piece which is arranged on the travelling trolley combination piece.
Description
Technical Field
The invention belongs to a nuclear power maintenance detection technology, and particularly relates to a special tool for dismounting a manhole of a horizontal high-pressure heater of a nuclear power station.
Background
In a nuclear reactor device of a certain nuclear power plant, 4 horizontal high-pressure heaters are respectively arranged, and according to the maintenance outline requirement, disassembly overhaul of at least one horizontal high-pressure heater is completed every time a unit is subjected to refueling overhaul. In disassembly and overhaul of the horizontal high-pressure heater, a basic and very important maintenance procedure is involved, namely, the manhole of the horizontal high-pressure heater is correctly disassembled and assembled.
Each horizontal high-pressure heater is provided with a manhole, the manhole adopts a self-sealing structure, and a manhole cover plate is elliptical (a short side is required to enter the manhole). Because the manhole flange sealing surface is positioned at the inner side of the water chamber, and the manhole cover plate is not provided with a fixing mechanism, a special tool is needed for unsealing and disassembling the manhole elliptical cover plate each time.
The existing special tool has the problems of time and labor waste, large space requirement and unreliable sealing, which can raise the labor intensity of related operation, and the labor intensity is in direct proportion to the time required for completing the work, thus not only prolonging the equipment maintenance time, but also increasing the maintenance total time and reducing the total economic benefit of the power station.
Disclosure of Invention
The invention aims to provide a special tool for dismounting a manhole of a horizontal high-pressure heater of a nuclear power station, which can reduce the labor intensity of maintenance personnel and improve the working efficiency.
The technical scheme of the invention is as follows:
A special tool for dismounting a manhole of a horizontal high-pressure heater of a nuclear power station comprises a rail combination piece, a bracket combination piece positioned below the rail combination piece, a travelling crane trolley combination piece which is arranged on the rail combination piece and can move back and forth, and a rotating arm combination piece which is arranged on the travelling crane trolley combination piece;
the bracket combining piece comprises a cross beam, two bottom plates, two lower supporting rods, two upper supporting rods and two adjusting nuts, wherein the two bottom plates, the two lower supporting rods, the two upper supporting rods and the two adjusting nuts are respectively arranged on two sides of the cross beam; the two bottom plates are fixedly arranged on the same plane, each bottom plate is fixedly connected with the lower supporting rod above, and the upper supporting rod is connected with the lower supporting rod through an adjusting nut;
the rail combining piece comprises a rail, an upper supporting plate, a supporting beam and a lower supporting plate, wherein the supporting beam is welded and installed above the lower supporting plate, the rail is welded and installed above the supporting beam, and the upper supporting plate is welded and installed in the middle of the rail and flush with the bottom;
The rotating arm combining piece comprises a rotating arm connecting piece, a rotating arm with one end connected with the rotating arm connecting piece and a blocking plate positioned at the other end of the rotating arm;
The travelling crane trolley assembly comprises a turnover connecting plate, a first pull rod connecting piece, a bearing seat connecting piece, a handle connecting piece, a second pull rod connecting piece and a pull rod adjusting nut, wherein the turnover connecting plate is positioned at one end of a rotating arm connecting piece and connected with the rotating arm connecting piece;
the screw rod is arranged below the rotary arm through the supporting seat, and the bearing seat combining piece is arranged at the lower end of the screw rod;
the bearing seat combining piece comprises a height adjusting nut arranged at the lower end of the screw rod, a gland arranged outside the height adjusting nut, a bearing gland arranged outside the gland and a bearing seat, wherein the bearing gland and the bearing seat are fixed through screws; and a bearing is arranged between the bearing seat and the height adjusting nut.
The upper end of the upper supporting rod is provided with a mounting hole, two ends of the cross beam are welded and fixed with the upper supporting rod through the mounting hole, and the lower end of the lower supporting rod is welded and fixed on the bottom plate; an upper support rod is arranged above the lower support rod.
The lower support plate of the track combination piece is fixedly connected with the cross beam of the bracket combination piece.
And the other end of the rotating arm is provided with a key slot for installation, one end of the rotating arm connecting piece is provided with a shaft hole, and the rotating arm connecting piece is welded and fixed with the rotating arm.
The first pull rod connecting piece is connected with the overturning connecting plate through bolts and nuts; the turnover connecting plate is connected with the rotating arm connecting piece through bolts and nuts.
The screw rods are two in number, the bearing seat connectors are two in number, and the lower ends of the two bearing seat connectors are connected through a connecting plate arranged below the bearing seats.
The lower part of the connecting plate is provided with an ear plate corresponding to each bearing seat connector, a pin shaft is arranged on the ear plate, a bearing and a washer are arranged at the outer side end part of the pin shaft, and a washer and a nut are arranged at the inner side end part of the pin shaft.
The handle combination piece comprises a connecting sleeve arranged at the end part of the rotating arm, a lifting lug arranged at the upper end of the connecting sleeve and a sealing cover arranged at the outer end of the connecting sleeve, wherein the sealing cover is fixedly connected with a blocking plate inside the connecting sleeve through a screw, and the connecting sleeve is connected with the rotating arm inside through a key.
The rotary handle is fixedly arranged outside the connecting sleeve.
The turnover connecting plate is connected with the high-pressure heater manhole cover plate, the special tool for disassembling and assembling the horizontal high-pressure heater manhole of the nuclear power station moves up and down along the Z axis to enable the high-pressure heater manhole cover plate to be aligned to the center of the high-pressure heater manhole, the travelling crane trolley assembly moves along the X axis, and enters the high-pressure heater through the high-pressure heater manhole.
The first pull rod connecting piece moves to drive the overturning connecting plate to rotate around the Y axis by taking the position of the connecting bolt as the rotation center until the manhole cover plate of the high-pressure heater rotates to be concentric with the manhole center, then the rotating handle rotates around the X axis by taking the center of the manhole cover plate of the high-pressure heater as the rotation center until the manhole cover plate is changed from vertical to horizontal, and then the moving trolley moves along the X axis away from the high-pressure heater until the manhole cover plate is installed in place.
The invention has the following remarkable effects:
The semi-automatic disassembly and assembly of the high-pressure manhole cover plate under the condition of no lifting equipment is realized by designing the screw rod and the height adjusting nut in the travelling crane trolley assembly in a manner of supporting by the adjustable sliding rail;
By designing the bracket combining piece and the trolley driving assembly, the tool has good centering function;
by designing a rotating handle and a pull rod adjusting nut in the trolley traveling crane assembly, the high-pressure manhole cover plate can move in X, Z two directions and rotate around a X, Y shaft in the moving range covered by the special tool;
through designing this specialized tool, only need a small amount of manpower can accomplish manhole dismouting operation, and the precision is higher, consequently can effectively reduce staff's intensity of labour, shorten equipment maintenance time, improve work efficiency.
Drawings
FIG. 1 is a schematic view of a stent binder;
FIG. 1-1 is a top view of FIG. 1;
FIGS. 1-2 are side views of FIG. 1;
FIG. 2-1 is a schematic view of a track bond;
FIG. 2-2 is a top view of FIG. 2-1;
fig. 2-3 is a side view of fig. 2-1;
FIG. 3-1 is a schematic illustration of a connection of a running gear train assembly to a swivel arm assembly;
FIG. 3-2 is a schematic view of a bearing mount coupler;
FIGS. 3-3 are schematic views of handle couplings;
FIGS. 3-4 are schematic views of a rotary handle installation;
FIG. 4-1 is a schematic view of a swivel arm coupling;
FIG. 4-2 is a top view of FIG. 4-1;
FIG. 5 is a schematic diagram of a tool special for disassembly and assembly of a manhole of a horizontal high-pressure heater of a nuclear power plant;
In the figure: 1. a bracket coupler; 2. a rail coupling; 3. a travelling crane trolley assembly; 4. a swivel arm coupler; fifthly, a manhole of the high-pressure heater; 6. manhole cover plate of high-pressure heater;
101. A cross beam; 102. an upper support bar; 103. an adjusting nut; 104. a lower support bar; 105. a bottom plate;
201. a track; 202. an upper support plate; 203. a support beam; 204. a lower support plate;
301. a handle coupler; 302. a second pull rod connector; 303. a pull rod adjusting nut; 304. a first pull rod connector; 305. a coupling nut; 306. a connecting bolt; 307. a bolt; 308. turning over the connecting plate; 309. a bearing seat connector; 310. a connecting plate; 311. ear plates; 312. the supporting seat; 313. a screw rod; 314. a height adjusting nut; 315. a gland; 316. a screw; 317. a bearing gland; 318. a bearing; 319. lifting lugs; 320. a bearing seat;
323. A pin shaft; 324. connecting sleeves; 325. a cover;
401. A closure plate; 402. a rotating arm; 403. a swivel arm connector;
Detailed Description
The invention is further illustrated by the following figures and detailed description.
As shown in fig. 1, the tool special for assembling and disassembling the manhole of the horizontal high-pressure heater of the nuclear power station comprises a rail joint 2, a bracket joint 1 which is positioned below the rail joint 2 and plays a supporting role, a travelling trolley assembly 3 which is arranged on the rail joint 2 and can move back and forth, and a rotating arm joint 4 which is arranged on the travelling trolley assembly 3;
A high-pressure heater manhole cover plate 6 is arranged below the travelling crane trolley assembly 3 and connected with the travelling crane trolley assembly; the high-pressure heater is positioned at one side of the special adjusting tool, and a manhole 5 is arranged on the high-pressure heater.
As shown in fig. 1, 1-1 and 1-2, the bracket coupler 1 is located below the whole device, and includes a cross beam 101, two bottom plates 105 respectively installed at both sides of the cross beam 101, two lower support rods 104, two upper support rods 102 and two adjustment nuts 103; two bottom plates 105 are fixedly installed on the same plane, each bottom plate 105 is fixedly connected with a lower supporting rod 104 above, and an upper supporting rod 102 is connected with the lower supporting rod 104 through an adjusting nut 103, so that the height is adjusted through threaded rotation. The upper end of the upper supporting rod 102 is provided with a mounting hole, two ends of the cross beam 101 are welded and fixed with the upper supporting rod 102 through the mounting hole, and the upper end of the bottom plate 105 is welded and fixed with the lower end of the lower supporting rod 104; an upper support bar 102 is mounted above the lower support bar 104.
As shown in fig. 2-1 to 2-3, the rail coupling 2 includes a rail 201, an upper support plate 202, a support beam 203, and a lower support plate 204.
The support beam 203 is welded and installed above the lower support plate 204, the rail 201 is welded and installed above the support beam 203, and the upper support plate 202 is welded and installed in the middle of the rail 201 and flush with the bottom.
The lower support plate 204 of the rail coupling 2 is fixedly connected to the cross beam 101 of the bracket coupling 1.
The boom coupling member 4 as shown in fig. 4-1 includes a boom connecting member 403, a boom 402 having one end connected to the boom connecting member 403, and a closure plate 401 at the other end of the boom 402;
as shown in fig. 4-2, the other end of the rotating arm 402 is provided with a key slot for installation, one end of the rotating arm connecting piece 403 is provided with a shaft hole, and the rotating arm connecting piece 403 is welded and fixed with the rotating arm 402.
As shown in fig. 3-1, the travelling car assembly 3 and the connection diagram thereon including the swivel arm connector 4 are shown, the travelling car assembly 3 includes a flip connection plate 308 located at one end of the swivel arm connector 4 and connected with the swivel arm connector 403, a first pull rod connector 304 connected with the flip connection plate 308, a bearing seat connector 309 installed below the swivel arm 402, a handle connector 301 located at the other end of the swivel arm connector 4, a second pull rod connector 302 located above the handle connector 301, and a pull rod adjusting nut 303 connecting the second pull rod connector 302 with the first pull rod connector 304;
wherein the first pull rod connecting piece 304 is connected with the overturning connecting plate 308 through a connecting bolt 306 and a connecting nut 305;
Wherein the turnover connecting plate 308 is connected with the rotating arm connecting piece 403 through a bolt 307 and a connecting nut 305;
as shown in the cross-sectional view of fig. 3-2, the internal structure of the bearing housing coupler 309 is shown,
The screw 313 is installed below the swivel arm 402 through the bearing block 312, and the bearing block coupler 309 is installed at the lower end of the screw 313.
The bearing housing coupler 309 includes a height adjusting nut 314 installed at a lower end of the lead screw 313, a gland 315 installed outside the height adjusting nut 314, a bearing cover 317 installed outside the gland 315, and a bearing housing 320, wherein the bearing cover 317 and the bearing housing 320 are fixed by a screw 316; a bearing 318 is installed between the bearing housing 320 and the height adjusting nut 314.
The number of the screw rods 313 is two, and thus the number of the bearing housing couplers 309 is two, and the lower ends of the two bearing housing couplers 309 are connected by the connection plate 310 installed under the bearing housing 320. While the lug plate 311 is installed below the connection plate 310 corresponding to each bearing housing coupler 309, and the pin shaft 323 is installed on the lug plate 311, the bearing and the washer are installed at the outer end of the pin shaft 323, and the washer and the nut are installed at the inner end of the pin shaft 323.
As shown in fig. 3-3, which are sectional views showing the structure of the handle coupling 301, the handle coupling 301 includes a coupling sleeve 324 installed at an end of a rotary arm 402, a lifting lug 319 installed at an upper end of the coupling sleeve 324, and a cover 325 installed at an outer end of the coupling sleeve 324, the cover 325 is fixedly coupled to an inner blocking plate 401 of the coupling sleeve 324 by means of a screw, and the coupling sleeve 324 is coupled to the rotary arm 402 by means of a key.
As shown in fig. 3-4, a rotary handle 328 is fixedly installed at the outside of the connection sleeve 324 for rotating the manhole cover plate by the rotary handle.
As shown in fig. 5, the manhole cover 6 of the high-pressure heater is installed on the turnover connection plate 308, and the special tool is adjusted to move up and down along the Z axis so as to be aligned with the center of the manhole 5 of the high-pressure heater, so that the trolley moves along the X axis and enters the inside of the high-pressure heater through the manhole of the high-pressure heater. The first pull rod connecting piece 304 can be moved by adjusting the pull rod adjusting nut 303, the turnover connecting plate 308 is driven to rotate around the Y axis by taking the position of the bolt 307 as the rotation center until the manhole cover plate 6 rotates to be concentric with the center of the manhole 5, the rotary handle 328 is rotated around the X axis by taking the center of the manhole cover plate 6 as the rotation center until the manhole cover plate 6 is changed from vertical to horizontal, and then the moving trolley moves away from the high-pressure heater along the X axis until the manhole cover plate is installed in place.
Claims (9)
1. A special tool for dismounting a manhole of a horizontal high-pressure heater of a nuclear power station is characterized in that: comprises a track combination piece (2), a bracket combination piece (1) positioned below the track combination piece (2), a travelling trolley combination piece (3) which is arranged on the track combination piece (2) and can move back and forth, and a rotating arm combination piece (4) which is arranged on the travelling trolley combination piece (3);
The bracket combining piece (1) comprises a cross beam (101), two bottom plates (105), two lower supporting rods (104), two upper supporting rods (102) and two adjusting nuts (103), wherein the two bottom plates (105) are respectively arranged on two sides of the cross beam (101); the two bottom plates (105) are fixedly arranged on the same plane, each bottom plate (105) is fixedly connected with a lower supporting rod (104) above, and the upper supporting rod (102) is connected with the lower supporting rod (104) through an adjusting nut (103;
the rail combination piece (2) comprises a rail (201), an upper supporting plate (202), a supporting beam (203) and a lower supporting plate (204), wherein the supporting beam (203) is welded and installed above the lower supporting plate (204), the rail (201) is welded and installed above the supporting beam (203), and the upper supporting plate (202) is welded and installed in the middle of the rail (201) and flush with the bottom;
The rotating arm combining piece (4) comprises a rotating arm connecting piece (403), a rotating arm (402) with one end connected with the rotating arm connecting piece (403), and a blocking plate (401) positioned at the other end of the rotating arm (402);
The travelling trolley assembly (3) comprises a turnover connecting plate (308) which is positioned at one end of a rotating arm combining piece (4) and is connected with a rotating arm connecting piece (403), a first pull rod connecting piece (304) which is connected with the turnover connecting plate (308), a bearing seat combining piece (309) which is arranged below the rotating arm (402), a handle combining piece (301) which is positioned at the other end of the rotating arm combining piece (4), a second pull rod connecting piece (302) which is positioned above the handle combining piece (301), and a pull rod adjusting nut (303) which is used for connecting the second pull rod connecting piece (302) with the first pull rod connecting piece (304);
The screw rod (313) is arranged below the rotating arm (402) through the supporting seat (312), and the bearing seat combining piece (309) is arranged at the lower end of the screw rod (313);
The bearing seat combining piece (309) comprises a height adjusting nut (314) arranged at the lower end of the screw rod (313), a gland (315) arranged outside the height adjusting nut (314), a bearing gland (317) arranged outside the gland (315) and a bearing seat (320), wherein the bearing gland (317) and the bearing seat (320) are fixed through screws (316); a bearing (318) is arranged between the bearing seat (320) and the height adjusting nut (314);
The upper end of the upper supporting rod (102) is provided with a mounting hole, two ends of the cross beam (101) are welded and fixed with the upper supporting rod (102) through the mounting hole, and the lower ends of the bottom plate (105) and the lower supporting rod (104) are welded and fixed; an upper supporting rod (102) is arranged above the lower supporting rod (104);
The number of the screw rods (313) is two, the number of the bearing seat combining pieces (309) is two, and the lower ends of the two bearing seat combining pieces (309) are connected through a connecting plate (310) arranged below the bearing seat (320).
2. The tool special for assembling and disassembling a manhole of a horizontal high-pressure heater of a nuclear power station as set forth in claim 1, wherein: the lower support plate (204) of the track combination piece (2) is fixedly connected with the cross beam (101) of the bracket combination piece (1).
3. The tool special for assembling and disassembling a manhole of a horizontal high-pressure heater of a nuclear power station as set forth in claim 1, wherein: the other end of the rotating arm (402) is provided with a key slot for installation, one end of the rotating arm connecting piece (403) is provided with a shaft hole, and the rotating arm connecting piece (403) and the rotating arm (402) are welded and fixed.
4. The tool special for assembling and disassembling a manhole of a horizontal high-pressure heater of a nuclear power station as set forth in claim 1, wherein: the first pull rod connecting piece (304) is connected with the overturning connecting plate (308) through bolts and nuts; the overturning connecting plate (308) is connected with the rotating arm connecting piece (403) through bolts and nuts.
5. The tool special for assembling and disassembling a manhole of a horizontal high-pressure heater of a nuclear power station as set forth in claim 1, wherein: the lug plate (311) is arranged below the connecting plate (310) corresponding to each bearing seat connector (309), the pin shaft (323) is arranged on the lug plate (311), the bearing and the washer are arranged at the outer side end part of the pin shaft (323), and the washer and the nut are arranged at the inner side end part of the pin shaft (323).
6. The tool special for assembling and disassembling a manhole of a horizontal high-pressure heater of a nuclear power station as set forth in claim 1, wherein: the handle combination piece (301) comprises a connecting sleeve (324) arranged at the end part of the rotating arm (402), a lifting lug (319) arranged at the upper end of the connecting sleeve (324) and a sealing cover (325) arranged at the outer end of the connecting sleeve (324), wherein the sealing cover (325) is fixedly connected with a blocking plate (401) in the connecting sleeve (324) through a screw, and the connecting sleeve (324) is connected with the rotating arm (402) in the connecting sleeve through a key.
7. The tool special for assembling and disassembling a manhole of a horizontal high-pressure heater of a nuclear power station as set forth in claim 1, wherein: the rotary handle (328) is fixedly arranged outside the connecting sleeve (324).
8. The tool special for assembling and disassembling the manhole of the horizontal high-pressure heater of the nuclear power station as set forth in claim 7, wherein: the turnover connecting plate (308) is connected with the high-pressure heater manhole cover plate (6), the horizontal high-pressure heater manhole disassembly and assembly special tool of the nuclear power station moves up and down along the Z axis to enable the pressure heater manhole cover plate (6) to be aligned with the center of the high-pressure heater manhole (5), and the travelling crane trolley assembly (3) moves along the X axis and enters the high-pressure heater through the high-pressure heater manhole (5).
9. The tool special for assembling and disassembling the manhole of the horizontal high-pressure heater of the nuclear power station as set forth in claim 8, wherein: the first pull rod connecting piece (304) moves to drive the overturning connecting plate (308) to rotate around the Y axis by taking the position of the connecting bolt as the rotation center until the high-pressure heater manhole cover plate (6) rotates to be concentric with the center of the manhole (5), and then the rotating handle (328) rotates around the X axis by taking the center of the high-pressure heater manhole cover plate (6) as the rotation center until the high-pressure heater manhole cover plate (6) is changed from vertical to horizontal, and then the moving trolley moves along the X axis away from the high-pressure heater until the manhole cover plate is installed in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011330537.6A CN112548927B (en) | 2020-11-24 | 2020-11-24 | Special tool for dismounting manhole of horizontal high-pressure heater of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011330537.6A CN112548927B (en) | 2020-11-24 | 2020-11-24 | Special tool for dismounting manhole of horizontal high-pressure heater of nuclear power station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112548927A CN112548927A (en) | 2021-03-26 |
| CN112548927B true CN112548927B (en) | 2024-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011330537.6A Active CN112548927B (en) | 2020-11-24 | 2020-11-24 | Special tool for dismounting manhole of horizontal high-pressure heater of nuclear power station |
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| CN (1) | CN112548927B (en) |
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|---|---|---|---|---|
| JPH0240402A (en) * | 1988-07-29 | 1990-02-09 | Hitachi Ltd | Disassembly of inner lid of manhole of feed water heater |
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| CN110856916A (en) * | 2018-08-22 | 2020-03-03 | 中核核电运行管理有限公司 | Oval self sealss manhole cover plate dismouting device |
| JP2020070032A (en) * | 2018-10-30 | 2020-05-07 | スイコー株式会社 | Manufacturing method of tank with manhole and manhole body |
| CN111267043A (en) * | 2020-03-13 | 2020-06-12 | 江苏核电有限公司 | Tool and method for adjusting center position of inclined manhole cover plate of nuclear power station |
| CN111267031A (en) * | 2020-03-13 | 2020-06-12 | 江苏核电有限公司 | Device for disassembling and assembling mechanical seal and disassembling and assembling method thereof |
| CN215201721U (en) * | 2020-11-24 | 2021-12-17 | 江苏核电有限公司 | Special tool for disassembling and assembling manhole of horizontal high-pressure heater of nuclear power station |
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