CN109967278B - Flexible mud residue flushing gun body structure of secondary side tube plate of steam generator - Google Patents
Flexible mud residue flushing gun body structure of secondary side tube plate of steam generator Download PDFInfo
- Publication number
- CN109967278B CN109967278B CN201711464208.9A CN201711464208A CN109967278B CN 109967278 B CN109967278 B CN 109967278B CN 201711464208 A CN201711464208 A CN 201711464208A CN 109967278 B CN109967278 B CN 109967278B
- Authority
- CN
- China
- Prior art keywords
- cover plate
- sliding frame
- steel belt
- gun body
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 51
- 239000010959 steel Substances 0.000 claims abstract description 51
- 239000010802 sludge Substances 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 239000013049 sediment Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 abstract description 2
- 238000007665 sagging Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
Landscapes
- Cleaning In General (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
The invention belongs to the technical field of flushing of flexible mud residue guns of secondary side tube plates of steam generators, and particularly relates to a structure of a flexible mud residue flushing gun body of a secondary side tube plate of a steam generator; the main frame is a strip frame structure with a rectangular section, a rack is arranged at the center of the bottom of the main frame along the axial direction, and the rack is meshed with the rotary stepping driving device to realize transmission; the cable cover plate and the steel belt cover plate are of C-shaped arc plate structures, the cable cover plate is buckled on the left side of the main frame to form a cable channel, and the cable of the flexible sludge flushing gun head is coated; the steel belt cover plate is buckled on the right side of the main frame to form a flexible steel belt channel, and the flexible steel belt is coated and guided; the front end of the main frame is provided with a connecting male head, and the rear end of the main frame is provided with a connecting female head; the male connection head and the female connection head of the adjacent flushing gun body structure are matched, so that the connection of a plurality of flushing gun body structures is realized. The invention not only does not affect the butt joint of racks of adjacent gun bodies, but also reduces the gap at the joint of the adjacent gun bodies and avoids the sagging of the gun heads caused by the connection of the multi-section gun bodies.
Description
Technical Field
The invention belongs to the technical field of flushing of flexible mud residue guns of secondary side tube plates of steam generators, and particularly relates to a structure of a flexible mud residue flushing gun body of a secondary side tube plate of a steam generator.
Background
The secondary side tube plate sludge deposition of the steam generator has serious consequences for the steam generator, and the removal of the sludge becomes an important component of the maintenance and management of the steam generator of the nuclear power station. Aiming at the secondary hardness and the hard sludge formed after the long-term operation of the steam generator, the flexible steel belt carrying the high-pressure hose needs to extend into the space between the heat transfer pipes, so that the energy loss of high-pressure water jet is reduced, and the flushing effect is improved. The size of the push-pull gun head cannot be too long due to the limitation of the installation space; in order to clean the flexible sludge in the whole range of the steam generator, the push-pull gun head needs to be prolonged; meanwhile, in order to enable the steel belt extending out of the push-pull gun head to be aligned between different heat transfer tubes, a guide rail is provided for the push-pull gun head, so that the push-pull gun head can be conveniently driven to axially move along the central tube gallery.
In the process of extending the connection of the push-pull gun head, the following difficulties exist:
(1) The connection rigidity must be enough to ensure that, due to the structural limitation of the steam generator, only a small gap exists between the push-pull gun head and the steam generator flow distribution plate or the lower blocking block, if the push-pull gun head sags due to the connection gap in the connection process, the push-pull gun head will interfere with the steam generator lower blocking block;
(2) The step transmission of the push-pull gun head is not influenced before and after connection;
(3) The assembly and disassembly are convenient in the extension process.
Disclosure of Invention
The invention aims to provide a flexible mud flushing gun body structure of a secondary side pipe plate of a steam generator, which provides extension for a flexible mud flushing gun head of the secondary side pipe plate of the steam generator, so that the gun head can reach the center of the steam generator; meanwhile, a guide rail is provided for the gun head to move along the axis direction of the central pipe gallery, so that the steel belt extending out of the gun head can be aligned among different heat transfer pipe.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a flexible mud sediment washing rifle body structure of steam generator secondary side tube board, this rifle body structure includes main frame, connects the public head, connects female head, rack, cable cover plate, steel band apron and swivel pin;
the main frame is a strip frame structure with a rectangular section and supports and fixes other structures; a rack is arranged at the center of the bottom of the main frame along the axial direction and meshed with the rotary stepping driving device to realize transmission;
The cable cover plate and the steel belt cover plate are of C-shaped arc plate structures, the cable cover plate is buckled on the left side of the main frame to form a cable channel, and the cable of the flexible sludge flushing gun head is coated; the steel belt cover plate is buckled on the right side of the main frame to form a flexible steel belt channel, and the flexible steel belt is coated and guided;
The lower ends of the cable cover plate and the steel belt cover plate are connected with the main frame through rotating pins, and the cable cover plate and the steel belt cover plate can rotate around the rotating pins;
the front end of the main frame is provided with a connecting male head, and the rear end of the main frame is provided with a connecting female head; the male connection head and the female connection head of the adjacent flushing gun body structure are matched, so that the connection of a plurality of flushing gun body structures is realized.
The gun body structure also comprises a sliding frame;
The sliding frame is provided with a plurality of groups of C-shaped buckle rectangular strips on two sides, and a plurality of groups of clamping grooves are formed in the cable cover plate and the steel belt cover plate; the sliding frame slides rightwards, the C-shaped buckle of the sliding frame is matched with the clamping grooves on the cable cover plate and the steel belt cover plate, the clamping of the cable cover plate and the steel belt cover plate is achieved, the sliding frame slides leftwards, the C-shaped buckle of the sliding frame is separated from the clamping grooves on the cable cover plate and the steel belt cover plate, and the opening of the cable cover plate and the steel belt cover plate is achieved.
The gun body structure also comprises a sliding frame switch;
The sliding frame is provided with a sliding frame switch, and the sliding frame switch is a spring button switch capable of moving up and down and is matched with a switch hole position of the sliding frame to control the sliding frame to slide; when the sliding frame switch is pressed downwards below the sliding frame, the sliding frame can slide rightwards along the axial direction of the main frame, so that the cover is opened; when the sliding frame switch pops up and is matched with the switch hole on the sliding frame, the axial movement of the sliding frame is limited, and the closing and locking of the cover are realized.
The gun body structure also comprises a bevel gear wrench; the connecting male head further comprises an axial limiting disc and bevel gear screws; the connecting male head is of a cylindrical cavity structure, a spanner hole is formed in the front section of the connecting male head in the radial direction, a center hole is formed in the connecting male head in the central axis direction, a bevel gear screw is arranged in the spanner hole, the front end of the bevel gear screw extends out of the center hole, an axial limiting disc is further arranged in the spanner hole, and the axial limiting disc is positioned at the rear part of the bevel gear screw;
when the connecting male head and the connecting female head of the adjacent flushing gun body structure are matched, the connecting male head stretches into the connecting female head, the bevel gear screw withstands the screw hole of the connecting female head, the bevel gear wrench stretches into the wrench hole to be meshed with the bevel gear screw, the bevel gear wrench rotates to drive the bevel gear screw to rotate, the bevel gear screw is screwed into the screw hole on the connecting female head, the bevel gear wrench is pulled out, and the fixing of the connecting male head and the connecting female head is achieved.
The invention has the technical effects that:
(1) According to the flexible mud residue flushing gun body structure of the secondary side tube plate of the steam generator, provided by the invention, the gun body structure is provided with the rack as a guide rail, and the rack can be driven by the gear, so that the gun body assembly and the push-pull gun head move along the axis direction of the central tube lane of the steam generator, and the steel belt extending out of the push-pull gun head is conveniently aligned between different heat transfer tubes.
(2) According to the flexible mud residue flushing gun body structure of the secondary side tube plate of the steam generator, the flexible steel belt and the cable of the push-pull gun head are packaged and protected through the openable and closable cover plate, so that the steel belt is prevented from being twisted and can not be meshed with the chain wheel of the push-pull gun head correctly.
(3) According to the flexible mud residue flushing gun body structure of the secondary side pipe plate of the steam generator, the front gun body structure and the rear gun body structure are connected in a built-in bevel gear screw connection mode, the connection mode not only reduces the connection gap in a threaded connection mode, but also ensures the connection rigidity; meanwhile, the built-in threaded connection can also ensure that the circumferential positioning of the gun body structure after connection is consistent, namely racks on the two adjacent gun body structures before and after connection are always on the same plane, and step transmission is not affected.
(4) The invention relates to a flexible mud flushing gun body structure of a secondary side tube plate of a steam generator, which can prolong a gun head in a limited installation space, so that the gun head and a flexible steel belt extending out of the gun head can reach between heat transfer tube tubes in the center of the steam generator.
Drawings
FIG. 1 is a schematic diagram of the structural arrangement of a flexible sludge flushing gun body of a secondary side tube sheet of a steam generator;
FIG. 2 is a schematic diagram of a flexible sludge flushing gun body for a secondary side tube sheet of a steam generator;
FIG. 3 is a schematic diagram showing the switch state of a sliding frame of a flexible mud flushing gun body structure of a secondary side pipe plate of a steam generator; wherein, fig. 3 (a) is a closed state of the secondary side tube sheet flexible sludge flushing gun body structure sliding frame of the steam generator; FIG. 3 (B) shows an open state of a secondary side tube sheet flexible sludge flushing gun body structure sliding frame of the steam generator;
FIG. 4 is a schematic diagram showing the connection between the structures of a flexible sludge flushing gun body of a secondary side tube plate of a steam generator;
in the figure: 01-an outer gun body section of the steam generator; 02-a rotary step driving device; 03-a steam generator; 04-gun body section in steam generator; 05-flushing gun heads with flexible sludge; 06-a flexible steel belt; 1-a main frame; 2-carriage switches; 3-a carriage; 4-connecting the male head; 5-connecting the female head; 6-a rack; 7-a cable cover plate; 8-a steel belt cover plate; 9-a rotation pin; 10-bevel gear wrench; 11-an axial limiting disc; 12-bevel gear screw.
Detailed Description
The following describes the structure of the flexible mud flushing gun body of the secondary side pipe plate of the steam generator in detail by combining the specific embodiments and the attached drawings.
As shown in fig. 1, in order to extend a flexible sludge flushing gun head 05 to reach the center of a steam generator 03 and clean a heat transfer tube in the steam generator 03, the flexible sludge flushing gun body structure of a secondary side tube plate of the steam generator is connected in series to extend the flexible sludge flushing gun head 05, a rotary stepping driving device 02 drives an outer gun body section 01 of the steam generator to gradually extend into the steam generator 03, an inner gun body section 04 of the steam generator supports the flexible sludge flushing gun head 05 to extend into the center of the steam generator 03, and the flexible sludge flushing gun head 05 controls a flexible steel belt 06 to extend into the heat transfer tube between the heat transfer tubes of the steam generator 03 to clean the heat transfer tube.
As shown in fig. 2, the flexible mud residue flushing gun body structure of the secondary side pipe plate of the steam generator comprises a main frame 1, a connecting male head 4, a connecting female head 5, a rack 6, a cable cover plate 7, a steel belt cover plate 8 and a rotating pin 9;
The main frame 1 is a strip frame structure with a rectangular section and supports and fixes other structures; a rack 6 is arranged at the center of the bottom of the main frame 1 along the axial direction, and the rack 6 is meshed with the rotary stepping driving device 02 to realize transmission;
The cable cover plate 7 and the steel belt cover plate 8 are of C-shaped arc plate structures, the cable cover plate 7 is buckled on the left side of the main frame 1 to form a cable channel, and the cable of the flexible mud flushing gun head 05 is coated; the steel belt cover plate 8 is buckled on the right side of the main frame 1 to form a flexible steel belt channel, and the flexible steel belt 06 is coated and guided;
The lower ends of the cable cover plate 7 and the steel belt cover plate 8 are connected with the main frame 1 through rotating pins 9, and the cable cover plate 7 and the steel belt cover plate 8 can rotate around the rotating pins 9 to realize opening and closing, so that the installation of cables and flexible steel belts 06 is facilitated;
The front end of the main frame 1 is provided with a connecting male head 4, and the rear end is provided with a connecting female head 5; when a plurality of flushing gun body structures are connected in series, the connecting male heads 4 and the connecting female heads 5 of the adjacent flushing gun body structures are matched, so that the connection of the flushing gun body structures is realized.
As shown in fig. 3, the flexible mud residue flushing gun body structure of the secondary side pipe plate of the steam generator further comprises a sliding frame switch 2 and a sliding frame 3;
The sliding frame 3 is provided with a plurality of groups of C-shaped buckle rectangular strips on two sides, and a plurality of groups of clamping grooves are formed in the cable cover plate 7 and the steel belt cover plate 8; the sliding frame 3 slides rightwards, the C-shaped buckle of the sliding frame 3 is matched with the clamping grooves on the cable cover plate 7 and the steel belt cover plate 8, so that clamping of the cable cover plate 7 and the steel belt cover plate 8 is realized, the sliding frame 3 slides leftwards, the C-shaped buckle of the sliding frame 3 is separated from the clamping grooves on the cable cover plate 7 and the steel belt cover plate 8, and opening of the cable cover plate 7 and the steel belt cover plate 8 is realized;
The sliding frame 3 is provided with a sliding frame switch 2, and the sliding frame switch 2 is a spring button switch capable of moving up and down and is matched with a switch hole position of the sliding frame 3 to control the sliding frame 3 to slide; when the sliding frame switch 2 is pressed downwards below the sliding frame 3, the sliding frame 3 can slide rightwards along the axial direction of the main frame 1, so that uncovering is realized; when the carriage switch 2 pops up and mates with the switch aperture on the carriage 3, the axial movement of the carriage 3 is restricted, ensuring closure.
As shown in fig. 4, the flexible mud flushing gun structure of the secondary side pipe plate of the steam generator further comprises a bevel gear wrench 10; the connecting male 4 further comprises an axial limiting disc 11 and a bevel gear screw 12; the connecting male head 4 is of a cylindrical cavity structure, a spanner hole is formed in the front section of the connecting male head in the radial direction, a center hole is formed in the connecting male head 4 in the central axis direction, a bevel gear screw 12 is arranged in the spanner hole, the front end of the bevel gear screw 12 extends out of the center hole, an axial limiting disc 11 is further arranged in the spanner hole, and the axial limiting disc 11 is positioned at the rear part of the bevel gear screw 12;
When the connecting male head 4 and the connecting female head 5 of the adjacent flushing gun body structure are matched, the connecting male head 4 stretches into the connecting female head 5, the bevel gear screw 12 props against a screw hole of the connecting female head 5, the bevel gear wrench 10 stretches into the wrench hole to be meshed with the bevel gear screw 12, the bevel gear wrench 10 rotates to drive the bevel gear screw 12 to rotate, the bevel gear screw 12 is screwed into the screw hole on the connecting female head 5, the bevel gear wrench 10 is pulled out, and the fixing of the connecting male head 4 and the connecting female head 5 is realized.
According to the invention, the matching mode of the male connecting head 4 and the female connecting head 5 does not influence the butt joint of racks 6 of adjacent gun bodies, reduces the gap at the joint of the adjacent gun bodies, and avoids the sagging of the gun heads caused by the connection of multiple sections of gun bodies.
Claims (3)
1. A flexible mud sediment washing rifle body structure of steam generator secondary side tube board, its characterized in that: the gun body structure comprises a main frame, a connecting male head, a connecting female head, a rack, a cable cover plate, a steel belt cover plate and a rotating pin;
the main frame is of a strip frame structure with a rectangular section, a rack is arranged at the center of the bottom of the main frame along the axial direction, and the rack is meshed with the rotary stepping driving device to realize transmission;
The cable cover plate and the steel belt cover plate are of C-shaped arc plate structures, the cable cover plate is buckled on the left side of the main frame to form a cable channel, and the cable of the flexible sludge flushing gun head is coated; the steel belt cover plate is buckled on the right side of the main frame to form a flexible steel belt channel, and the flexible steel belt is coated and guided;
The lower ends of the cable cover plate and the steel belt cover plate are connected with the main frame through rotating pins, and the cable cover plate and the steel belt cover plate can rotate around the rotating pins;
the front end of the main frame is provided with a connecting male head, and the rear end of the main frame is provided with a connecting female head; the connecting male head and the connecting female head of the adjacent flushing gun body structure are matched to realize the connection of a plurality of flushing gun body structures,
The gun body structure also comprises a bevel gear wrench; the connecting male head further comprises an axial limiting disc and bevel gear screws; the connecting male head is of a cylindrical cavity structure, a spanner hole is formed in the front section of the connecting male head in the radial direction, a center hole is formed in the connecting male head in the central axis direction, a bevel gear screw is arranged in the spanner hole, the front end of the bevel gear screw extends out of the center hole, an axial limiting disc is further arranged in the spanner hole, and the axial limiting disc is positioned at the rear part of the bevel gear screw;
When the male joint of the adjacent flushing gun body structure is matched with the female joint, the male joint is connected to extend into the female joint, the bevel gear screw is propped against the screw hole of the female joint, the bevel gear wrench extends into the wrench hole to be meshed with the bevel gear screw, the bevel gear wrench is rotated to drive the bevel gear screw to rotate, the bevel gear screw is screwed into the screw hole on the female joint, the bevel gear wrench is pulled out, the male joint is fixed with the female joint, the built-in threaded connection can further ensure that the circumferential positioning of the gun body structure is consistent after connection, namely racks on the two adjacent gun body structures are always on the same plane after connection, and step transmission is not affected.
2. The flexible sludge flushing gun body structure of the secondary side pipe plate of the steam generator according to claim 1, wherein: the gun body structure also comprises a sliding frame;
The sliding frame is provided with a plurality of groups of C-shaped buckle rectangular strips on two sides, and a plurality of groups of clamping grooves are formed in the cable cover plate and the steel belt cover plate; the sliding frame slides rightwards, the C-shaped buckle of the sliding frame is matched with the clamping grooves on the cable cover plate and the steel belt cover plate, the clamping of the cable cover plate and the steel belt cover plate is achieved, the sliding frame slides leftwards, the C-shaped buckle of the sliding frame is separated from the clamping grooves on the cable cover plate and the steel belt cover plate, and the opening of the cable cover plate and the steel belt cover plate is achieved.
3. The flexible sludge flushing gun body structure of the secondary side pipe plate of the steam generator according to claim 2, wherein: the gun body structure also comprises a sliding frame switch;
The sliding frame is provided with a sliding frame switch, and the sliding frame switch is a spring button switch capable of moving up and down and is matched with a switch hole position of the sliding frame to control the sliding frame to slide; when the sliding frame switch is pressed downwards below the sliding frame, the sliding frame can slide rightwards along the axial direction of the main frame, so that the cover is opened; when the sliding frame switch pops up and is matched with the switch hole on the sliding frame, the axial movement of the sliding frame is limited, and the closing and locking of the cover are realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711464208.9A CN109967278B (en) | 2017-12-28 | 2017-12-28 | Flexible mud residue flushing gun body structure of secondary side tube plate of steam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711464208.9A CN109967278B (en) | 2017-12-28 | 2017-12-28 | Flexible mud residue flushing gun body structure of secondary side tube plate of steam generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109967278A CN109967278A (en) | 2019-07-05 |
| CN109967278B true CN109967278B (en) | 2024-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711464208.9A Active CN109967278B (en) | 2017-12-28 | 2017-12-28 | Flexible mud residue flushing gun body structure of secondary side tube plate of steam generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109967278B (en) |
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|---|---|---|---|---|
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| CN101196291A (en) * | 2006-10-31 | 2008-06-11 | 韩国电力公社 | Steam generator sludge lancing system with flexible inter-tube lance |
| CN201482024U (en) * | 2009-08-25 | 2010-05-26 | 钟基强 | Movable water mist fire protection curtain |
| CN201766330U (en) * | 2010-07-01 | 2011-03-16 | 上海市电力公司超高压输变电公司 | Tightener used for stringing high-voltage line |
| CN204470251U (en) * | 2014-12-30 | 2015-07-15 | 中核武汉核电运行技术股份有限公司 | A kind of steam generator body refuse sluice gun gun barrel |
| CN106271870A (en) * | 2016-10-15 | 2017-01-04 | 山东大学 | A kind of flexible joint nozzle |
| CN107175227A (en) * | 2016-03-10 | 2017-09-19 | 核动力运行研究所 | Steam generator secondary side the first supporting plate lower surface hydrodynamic cleaning device |
| CN107175228A (en) * | 2016-03-10 | 2017-09-19 | 核动力运行研究所 | Steam generator secondary side the first supporting plate lower surface hydrodynamic cleaning guider |
| CN206523090U (en) * | 2016-12-30 | 2017-09-26 | 核动力运行研究所 | A kind of flexible body refuse of rounded projections arranged heat-transfer pipe rinses pipette tips |
| CN207981476U (en) * | 2017-12-28 | 2018-10-19 | 核动力运行研究所 | A kind of steam generator secondary side tube sheet flexibility body refuse flushing lance body structure |
-
2017
- 2017-12-28 CN CN201711464208.9A patent/CN109967278B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4407236A (en) * | 1981-09-21 | 1983-10-04 | Combustion Engineering, Inc. | Sludge lance for nuclear steam generator |
| CN101196291A (en) * | 2006-10-31 | 2008-06-11 | 韩国电力公社 | Steam generator sludge lancing system with flexible inter-tube lance |
| CN201482024U (en) * | 2009-08-25 | 2010-05-26 | 钟基强 | Movable water mist fire protection curtain |
| CN201766330U (en) * | 2010-07-01 | 2011-03-16 | 上海市电力公司超高压输变电公司 | Tightener used for stringing high-voltage line |
| CN204470251U (en) * | 2014-12-30 | 2015-07-15 | 中核武汉核电运行技术股份有限公司 | A kind of steam generator body refuse sluice gun gun barrel |
| CN107175227A (en) * | 2016-03-10 | 2017-09-19 | 核动力运行研究所 | Steam generator secondary side the first supporting plate lower surface hydrodynamic cleaning device |
| CN107175228A (en) * | 2016-03-10 | 2017-09-19 | 核动力运行研究所 | Steam generator secondary side the first supporting plate lower surface hydrodynamic cleaning guider |
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|---|---|
| CN109967278A (en) | 2019-07-05 |
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