CN113477592A - Cleaning device and method for secondary side hard sludge of steam generator - Google Patents
Cleaning device and method for secondary side hard sludge of steam generatorDownload PDFInfo
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- CN113477592A CN113477592ACN202110788481.7ACN202110788481ACN113477592ACN 113477592 ACN113477592 ACN 113477592ACN 202110788481 ACN202110788481 ACN 202110788481ACN 113477592 ACN113477592 ACN 113477592A
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- 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
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D57/00—Vehicles characterised by having other propulsion or other ground- engaging means than wheels or endless track, alone or in addition to wheels or endless track
- B62D57/02—Vehicles characterised by having other propulsion or other ground- engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members
- B62D57/024—Vehicles characterised by having other propulsion or other ground- engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members specially adapted for moving on inclined or vertical surfaces
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Translated fromChinese
Description
Technical Field
The invention belongs to the technical field of nuclear power, and particularly relates to a device and a method for cleaning secondary side hard sludge of a steam generator.
Background
The steam generator is one of the important equipment in nuclear power plant, and plays the role of heat exchange and isolation of the first loop and the second loop. The deposition of sludge on the secondary side of the tube plate of the steam generator can cause serious consequences to the steam generator, and the removal of the sludge becomes an important component for the maintenance and management of the steam generator of the nuclear power station.
According to the operation feedback of domestic and foreign pressurized water reactor nuclear power stations, the cleaning of the secondary side tube plate sludge of the steam generator is routine work during each shutdown maintenance period, and the cleaning method mainly aims at removing the sludge on the secondary side tube plate of the steam generator. The conventional cleaning method is mainly adopted in the conventional method for removing the sludge of the secondary side tube plate of the steam generator, namely, high-pressure water jet perpendicular to the direction of a central tube corridor is arranged in the central tube corridor, and high-pressure water is sprayed out from a nozzle and injected into a heat transfer tube room to clean the sludge of a heat transfer tube root between tubes. But the outlet pressure of the high-pressure water jet in the sludge cleaning method can not reach the intensity of removing the hard sludge; and the method can not clean the sludge between the heat transfer pipes parallel to the central pipe gallery direction.
Disclosure of Invention
The invention aims to provide a cleaning device for secondary side hard sludge of a steam generator of a nuclear power station.
In order to achieve the purpose, the invention adopts the technical scheme that:
a secondary side hard sludge cleaning device of a steam generator comprises:
wall climbing unit: the steam generator inner cylinder wall moving device is used for moving on the inner cylinder wall of a steam generator and comprises a vehicle body, a travelling mechanism and an angle adjusting mechanism, wherein the travelling mechanism is connected to the bottom of the vehicle body, and the angle adjusting mechanism is connected to the front end of the vehicle body and can rotate in the vertical direction relative to the vehicle body;
a cleaning unit: the device is used for cleaning hard sludge between heat transfer tubes in the steam generator and comprises cleaning equipment, a pump body communicated with the cleaning equipment, a composite cleaning mechanism and an external pipeline, wherein the composite cleaning mechanism is connected to the wall climbing unit, and the external pipeline is connected with the pump body and the composite cleaning mechanism;
a monitoring unit: the device is used for monitoring the working conditions of the wall climbing unit and the composite cleaning mechanism and comprises a first camera component and a first lighting component;
a control unit: the device is used for controlling the movement of the wall climbing unit and acquiring the image of the first camera component.
Preferably, the device further comprises an adjusting unit, the adjusting unit is used for adjusting the distance that the composite cleaning mechanism extends out of the wall climbing unit, the adjusting unit comprises a roller body arranged on the wall climbing unit and a roller body driving part for driving the roller body to rotate, the roller body driving part is connected with the control unit, a plurality of salient points protruding out of the surface of the roller body are arranged on the roller body, and the salient points are distributed along the circumferential direction of the roller body; the composite cleaning mechanism is provided with a plurality of holes along the length direction, the distance between every two adjacent holes is consistent with the distance between every two adjacent convex points, the convex points are matched with the holes, and the convex points on the roller body are enabled to shift the holes on the composite cleaning mechanism by rotating the roller body, so that the purpose of adjusting the distance that the composite cleaning mechanism extends out of the wall climbing unit is achieved.
Preferably, compound wiper mechanism include the strip area body, shower nozzle and inside pipeline, the shower nozzle setting be in the front end both sides of the area body, inside pipeline set up the area internal portion, its one end with the shower nozzle connect, the other end with external pipeline connect, the hole set up the area body on and distribute along its length direction, the shower nozzle adopt high pressure nozzle, both sides the shower nozzle can balance compound wiper mechanism cleaning in-process high pressure water reverse force, make it keep stable.
Further preferably, the composite cleaning mechanism further comprises a second camera component and a second illuminating component, the second camera component and the second illuminating component are arranged at the front end of the belt body, the monitoring unit is used for acquiring images of the second camera component, the second camera component can position a hard sludge area and check the cleaning effect of the hard sludge, the composite cleaning mechanism is started to clean after being conveyed to the position of the hard sludge through visual assistance, and after cleaning is finished, the cleaning effect is verified through a video image.
Preferably, the traveling mechanism comprises wheels and a wheel driving part for driving the wheels to rotate, the wheel driving part is connected with the control unit, the wheels comprise a left wheel and a right wheel which are made of magnetic materials, the magnetic wheels are attached to the inner cylinder wall of the steam generator, the composite cleaning mechanism is conveyed to mud residues between heat transfer pipes parallel to the central pipe gallery direction to be cleaned at fixed points in the outer ring gallery direction of the steam generator, the left wheel and the right wheel are respectively connected to two sides of the bottom of the vehicle body and are distributed in the front and back direction, and the purpose of controlling the vehicle body to advance, retreat and turn is achieved by controlling the left wheel and the right wheel to advance or retreat.
Further preferably, the travelling mechanism further comprises wheel cleaning components, the wheel cleaning components are arranged on two sides of the wheel, and the wheel cleaning components can be used for removing iron rust and other impurities adsorbed on the magnetic wheel, so that the iron rust and other impurities can be more firmly adsorbed on the inner cylinder wall of the steam generator.
Preferably, the angle adjusting mechanism comprises an adjusting seat rotatably connected to the front end of the vehicle body and a rotary driving part for driving the adjusting seat to rotate relative to the vehicle body, the rotary driving part is connected with the control unit, and the angle of the composite cleaning mechanism entering the heat transfer pipes can be adjusted by rotating the adjusting seat, so that the composite cleaning mechanism can enter the heat transfer pipes more smoothly.
Preferably, the car body is made of aluminum, the weight is light, smooth chamfers are designed on the appearance of the car body, the heat transfer pipe is prevented from being knocked down, the maximum volume of the car body is smaller than the width between the inner cylinder wall of the steam generator and the heat transfer pipe, and even under the extreme condition that the car body falls off, the car body cannot be clamped between the inner cylinder wall of the steam generator and the heat transfer pipe, so that the car body cannot be taken out.
Preferably, the pressure regulating range of the pump body is 200bar-500bar, and the high-pressure water jet of 200bar and 500bar can be generated and can be remotely controlled.
Further preferably, the pump body adopts a plunger type high-pressure pump, the pressure of the outlet of the pump is adjustable and set by rotating a pressure regulating valve, and high-pressure water is conveyed to the position of a secondary side tube plate of the steam generator to clean hard sludge.
The invention also aims to provide a method for cleaning the secondary side hard sludge of the steam generator of the nuclear power station.
In order to achieve the purpose, the invention adopts the technical scheme that:
a cleaning method of secondary side hard sludge of a steam generator adopts the cleaning device of the secondary side hard sludge of the steam generator to clean.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the function integration design integrates the high-pressure water jet required by cleaning and the inspection function of the hard sludge between the pipes after cleaning, and the cleaning stage can provide high-pressure water for cleaning the hard sludge and inspect the cleaning effect after the cleaning is finished;
2. the cleaning performance is more obvious, drives compound wiper mechanism to between the heat-transfer pipe through climbing the wall unit, and high pressure water jet can fix a position to the stereoplasm mud sediment region, concentrates on stereoplasm mud sediment cleaning point, and the fixed point carries out high pressure cleaning to the stereoplasm mud sediment, and the cleaning performance is better.
Drawings
FIG. 1 is a schematic view of the present embodiment during cleaning;
FIG. 2 is a first schematic structural diagram of the wall climbing unit (installation of the composite cleaning mechanism) in the embodiment;
fig. 3 is a first schematic structural diagram of the wall climbing unit in the present embodiment;
FIG. 4 is a first schematic structural view of the belt body of the present embodiment;
fig. 5 is a second schematic structural view of the belt body in the embodiment.
In the above drawings:
10. a vehicle body; 11. a wheel; 12. an adjusting seat; 2. a composite cleaning mechanism; 20. a belt body; 200. an aperture; 21. a spray head; 22. a second image pickup device; 23. a second illumination component; 24. cleaning equipment; 3. a roller body; 30. salient points; 4. a monitoring unit; 5. a cable; 60. the inner cylinder wall of the steam generator; 61. a heat transfer tube; 62. steam generator hand hole.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The cleaning device for the secondary side hard sludge of the steam generator mainly comprises a wall climbing unit, a cleaning unit, an adjusting unit, a monitoring unit and a control unit. The following details each unit:
as shown in fig. 2 and 3: the wall climbing unit is used for moving on theinner cylinder wall 60 of the steam generator and comprises avehicle body 10, a walking mechanism and an angle adjusting mechanism. Wherein:
theautomobile body 10 adopts the aluminium material, and light in weight, its appearance all designs rounding off chamfer, prevents to knock down heat-transfer pipe 61, and the biggest volume ofautomobile body 10 is less than the width between steam generatorinner tube wall 60 and the heat-transfer pipe 61, even under the extreme condition thatautomobile body 10 drops, can not the chucking not take out the condition emergence between steam generatorinner tube wall 60 and heat-transfer pipe 61 yet, leads to not taking out.
The running gear is connected to the bottom of thevehicle body 10. In this embodiment: the running mechanism compriseswheels 11 and wheel driving components for driving thewheels 11 to rotate, the wheel driving components are connected with the control unit, and the wheel driving components can adopt direct current motors and the like. Thewheel 11 includes the left wheel, the right wheel that adopt magnetism material, andmagnetism wheel 11 is attached to steam generatorinner tube wall 60, by steam generator outer ring corridor direction, sendscompound wiper mechanism 2 to the mud sediment that is on a parallel with between the heat-transfer pipe of central tube corridor direction and carries out the fixed point and wash. The left wheel and the right wheel are respectively connected to two sides of the bottom of thevehicle body 10 and are distributed front and back, the left wheel and the right wheel can move forward or backward by controlling the left wheel and the right wheel to rotate forward or backward, if the left wheel and the right wheel have the same rotating speed, the left wheel and the right wheel can move forward or backward, and if the left wheel and the right wheel have a rotating speed difference, the left wheel and the right wheel can steer due to the front and back distribution of the left wheel and the right wheel, so that the purposes of controlling thevehicle body 10 to move forward, backward and steer can be achieved.
In addition, the traveling mechanism further includes wheel cleaning members (not shown), which are disposed on both sides of thewheel 11, for example, brushes or the like. The arrangement of the wheel cleaning component can remove iron rust and other impurities adsorbed on themagnetic wheel 11, so that the iron rust and other impurities can be more firmly adsorbed on theinner cylinder wall 60 of the steam generator.
The angle adjustment mechanism is connected to a front end of thevehicle body 10 and is rotatable in the vertical direction with respect to thevehicle body 10. In this embodiment: the angle adjusting mechanism comprises an adjustingseat 12 which is rotatably connected to the front end of thevehicle body 10, and a rotation driving part which drives the adjustingseat 12 to rotate relative to thevehicle body 10, the rotation driving part is connected with the control unit, the rotation driving part can adopt a direct current motor, and the rotation of the adjustingseat 12 is realized through gear transmission. The angle of thecomposite cleaning mechanism 2 entering between theheat transfer tubes 61 can be adjusted by rotating the adjustingseat 12, so that the composite cleaning mechanism can enter between theheat transfer tubes 61 more smoothly.
The cleaning unit is used for cleaning hard sludge between theheat transfer tubes 61 in the steam generator. The cleaning device comprises acleaning device 24, a pump body communicated with thecleaning device 24, acomposite cleaning mechanism 2 and an external pipeline, wherein the external pipeline is connected with the pump body and thecomposite cleaning mechanism 2. Wherein:
thecleaning equipment 24 can provide a high-pressure water source, the pump body adopts a plunger type high-pressure pump, the pressure of the outlet of the pump can be adjusted and set by rotating the pressure regulating valve, the pressure adjusting range is 200-500bar, high-pressure water jet of 200-500bar can be generated, and the high-pressure water is conveyed to the position of a secondary side tube plate of the steam generator to clean the hard sludge.
As shown in fig. 4 and 5: thecomposite cleaning mechanism 2 includes astrip 20, anozzle 21 and an internal pipe. The spray heads 21 are arranged on two sides of the front end of thebelt body 20, the spray heads are high-pressure spray heads, and the spray heads on the two sides can balance the reverse acting force of high-pressure water in the cleaning process of the composite cleaning mechanism to keep the composite cleaning mechanism stable. The internal pipeline is arranged inside thebelt body 20, one end of the internal pipeline is connected with thespray head 21, and the other end of the internal pipeline is connected with the external pipeline. Thebelt body 20 is made of a high polymer material, and covers the inner pipe.
The composite cleaning mechanism further comprises asecond camera part 22 and a second illuminatingpart 23, thesecond camera part 22 and the second illuminatingpart 23 are arranged at the front end of thebelt body 20, the second illuminatingpart 23 can adopt an LED light source, thesecond camera part 22 can locate a hard mud residue area and check the cleaning effect of the hard mud residue, thecomposite cleaning mechanism 2 is started to clean after thecomposite cleaning mechanism 2 is conveyed to the position of the hard mud residue through visual assistance, and after cleaning is finished, the cleaning effect is verified through a video image.
Thecomposite cleaning mechanism 2 is connected to thevehicle body 10, but the distance of the composite cleaning mechanism extending out of the front end of thevehicle body 10 can be adjusted, the adjusting unit is used for adjusting the distance of thecomposite cleaning mechanism 2 extending out of thevehicle body 10, the adjusting unit comprises aroller body 3 arranged on the adjustingseat 12 and a roller body driving part for driving theroller body 3 to rotate, the roller body driving part is connected with the control unit, and the roller body driving part can be a direct current motor. A plurality ofsalient points 30 protruding out of the surface of theroller body 3 are arranged on theroller body 3, and thesalient points 30 are distributed along the circumferential direction; thebelt body 20 of thecomposite cleaning mechanism 2 is provided with a plurality ofholes 200 along the length direction, the distance between the holes of twoadjacent holes 200 is consistent with the distance between two adjacentsalient points 30, thesalient points 30 are matched with theholes 20, and thesalient points 30 on theroller body 3 are enabled to poke the holes in thebelt body 20 by rotating theroller body 3, so that the purpose of adjusting the distance of thecomposite cleaning mechanism 2 extending out of thevehicle body 10 is achieved.
The monitoring unit 4 is used for monitoring the working conditions of the wall climbing unit and thecomposite cleaning mechanism 2, and comprises a first camera shooting component and a first illuminating component, wherein the first illuminating component adopts an LED light source. The monitoring unit 4 is installed on the steamgenerator hand hole 62, and can be used for monitoring the motion condition of the wall climbing unit and visually observing the angle between theheat transfer pipe 61 and thecomposite cleaning mechanism 2, and assisting thecomposite cleaning mechanism 2 to smoothly enter the pipe.
The control unit is used for controlling the movement of the wall climbing unit, and acquiring the images of thefirst camera component 22 and the second camera component. The control unit can be a control cabinet, and is connected with the wall climbing unit (the walking mechanism and the angle adjusting mechanism) and the adjusting unit through thecable 5 to realize control.
The following details describe the working process of this embodiment, as shown in fig. 1:
connecting thecomposite cleaning mechanism 2 to thevehicle body 10, and matching thehole 200 on thebelt body 20 with thesalient point 30 of theroller body 3; adsorbing the wall climbing unit on theinner cylinder wall 60 of the steam generator through ahand hole 62 of the steam generator, and enabling thecable 5 and the external pipeline to also pass through thehand hole 62 of the steam generator; mounting the monitoring unit 4 on the flange surface of the steamgenerator hand hole 62; thecable 5 is connected to the control unit and the external pipeline is connected to the pump body and thecleaning equipment 24.
The operation is that themagnetic wheels 11 are controlled to move thevehicle body 10 to the first pipe to be cleaned to align the first pipe to be cleaned, if the position meets the requirement, the adjustingseat 12 is rotated to adjust the angle of thebelt body 20, and therotating roller body 3 is rotated to adjust the extending length of thebelt body 20 to drive the belt body to the position corresponding to the hard sludge.
Starting the pump body, spraying a high-pressure water source of thecleaning equipment 24 from thespray head 21 through the external pipeline and the internal pipeline to clean the hard sludge, observing the cleaning effect through thesecond camera part 22 on thecomposite cleaning mechanism 2 after the cleaning is finished, and cleaning again if the cleaning effect is not good; and after the cleaning is finished, taking out all the equipment entering the interior of the steam generator.
This embodiment has solved the water jet that current steam generator secondary side tube sheet conventional cleaning can't produce higher pressure, can't reach the problem of cleaing away stereoplasm mud sediment, and the device also can carry out high pressure cleaning to being on a parallel with between the heat-transfer pipe of center tube corridor direction, has increased the cleaning area.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a steam generator secondary side stereoplasm mud sediment belt cleaning device which characterized in that: the method comprises the following steps:
wall climbing unit: the steam generator inner cylinder wall moving device is used for moving on the inner cylinder wall of a steam generator and comprises a vehicle body, a travelling mechanism and an angle adjusting mechanism, wherein the travelling mechanism is connected to the bottom of the vehicle body, and the angle adjusting mechanism is connected to the front end of the vehicle body and can rotate in the vertical direction relative to the vehicle body;
a cleaning unit: the device is used for cleaning hard sludge between heat transfer tubes in the steam generator and comprises cleaning equipment, a pump body communicated with the cleaning equipment, a composite cleaning mechanism and an external pipeline, wherein the composite cleaning mechanism is connected to the wall climbing unit, and the external pipeline is connected with the pump body and the composite cleaning mechanism;
a monitoring unit: the device is used for monitoring the working conditions of the wall climbing unit and the composite cleaning mechanism and comprises a first camera component and a first lighting component;
a control unit: the device is used for controlling the movement of the wall climbing unit and acquiring the image of the first camera component.
2. The secondary side hard sludge cleaning device of the steam generator as claimed in claim 1, wherein: the device also comprises an adjusting unit, wherein the adjusting unit is used for adjusting the distance of the composite cleaning mechanism extending out of the wall climbing unit, the adjusting unit comprises a roller body arranged on the wall climbing unit and a roller body driving part for driving the roller body to rotate, the roller body driving part is connected with the control unit, a plurality of salient points protruding out of the surface of the roller body are arranged on the roller body, and the salient points are distributed along the circumferential direction of the roller body; the composite cleaning mechanism is provided with a plurality of holes along the length direction, the distance between every two adjacent holes is consistent with the distance between every two adjacent salient points, and the salient points are matched with the holes.
3. The secondary side hard sludge cleaning device of the steam generator as claimed in claim 2, wherein: the composite cleaning mechanism comprises a strip-shaped belt body, a sprayer and internal pipelines, wherein the sprayer is arranged on two sides of the front end of the belt body, the internal pipelines are arranged in the belt body, one end of the internal pipeline is connected with the sprayer, the other end of the internal pipeline is connected with an external pipeline, and holes are formed in the belt body and distributed along the length direction of the belt body.
4. The secondary side hard sludge cleaning device of the steam generator as claimed in claim 3, wherein: the composite cleaning mechanism further comprises a second camera shooting part and a second illuminating part, wherein the second camera shooting part and the second illuminating part are arranged at the front end of the belt body, and the monitoring unit is used for acquiring images of the second camera shooting part.
5. The secondary side hard sludge cleaning device of the steam generator as claimed in claim 1, wherein: running gear include the wheel, drive wheel pivoted wheel drive part, wheel drive part with the control unit connect, the wheel including adopt magnetic material's left wheel, right wheel, left wheel, right wheel connect respectively the automobile body bottom both sides and front and back distribution.
6. The secondary side hard sludge cleaning device of the steam generator as claimed in claim 5, wherein: the running mechanism further comprises wheel cleaning components, and the wheel cleaning components are arranged on two sides of the wheels.
7. The secondary side hard sludge cleaning device of the steam generator as claimed in claim 1, wherein: the angle adjusting mechanism comprises an adjusting seat which is rotatably connected to the front end of the vehicle body and a rotation driving part which drives the adjusting seat to rotate relative to the vehicle body, and the rotation driving part is connected with the control unit.
8. The secondary side hard sludge cleaning device of the steam generator as claimed in claim 1, wherein: the car body is made of aluminum, and the maximum volume of the car body is smaller than the width between the inner cylinder wall of the steam generator and the heat transfer pipe.
9. The secondary side hard sludge cleaning device of the steam generator as claimed in claim 1, wherein: the pressure regulating range of the pump body is 200bar-500 bar.
10. A cleaning method of secondary side hard sludge of a steam generator is characterized by comprising the following steps: the secondary side hard sludge cleaning device of the steam generator is adopted to clean the secondary side hard sludge cleaning device of the steam generator according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110788481.7ACN113477592A (en) | 2021-07-13 | 2021-07-13 | Cleaning device and method for secondary side hard sludge of steam generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110788481.7ACN113477592A (en) | 2021-07-13 | 2021-07-13 | Cleaning device and method for secondary side hard sludge of steam generator |
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