CN114234168B - Guide rail mechanism suitable for cleaning steam generator and mounting method thereof - Google Patents

Abstract

The invention discloses a guide rail mechanism suitable for cleaning a steam generator, which comprises a first guide rail, a second guide rail and a line rail, wherein the first guide rail and the second guide rail are mutually spliced and matched, the line rail is arranged on the first guide rail and the second guide rail, a plurality of positioning holes are formed in the line rail, the distance between adjacent positioning holes is the same as the distance between adjacent heat transfer pipes in the steam generator, and the positioning holes are matched with a proximity sensor on the cleaning mechanism to realize the stepping positioning of the cleaning mechanism; the guide rail mechanism comprises a first clamping assembly and a second clamping assembly which are arranged on the first guide rail and the second guide rail and used for clamping the left part and the right part of the splitter plate in the steam generator respectively. The guide rail mechanism suitable for cleaning the steam generator can realize equidistant movement of the cleaning mechanism below the full-section guide rail mechanism, and the portability of the guide rail mechanism and the stability of the structure after installation.

Description

Guide rail mechanism suitable for cleaning steam generator and mounting method thereof

Technical Field

The invention relates to the technical field of steam generator cleaning, in particular to a guide rail mechanism suitable for a high-efficiency and convenient steam generator cleaning device in a narrow space and an installation method for installing the guide rail mechanism on a steam generator splitter plate.

Background

Steam generator is an important device for primary and secondary heat exchange in nuclear power plant, and up to ten thousand tube bundles are installed inside. And cleaning the secondary side tube bundle of the steam generator when the nuclear power plant is shut down for maintenance each time.

In the existing steam generator cleaning technology, due to the limitation of the structure of the steam generator, the hand hole is generally cleaned by half-section type, namely, cleaning tools enter the container from the hand holes on two sides respectively for cleaning, the cleaning tools need to be transferred and installed between the two hand holes, and meanwhile, the cleaning adopts a sectional type threaded connection rigid gun, so that the length of the gun body needs to be increased or reduced for many times to adapt to the cleaning requirements of different positions. Because the room space of the steam generator is narrow, the dosage rate is higher, and each steam generator is required to be cleaned and is required to be transferred to and from a gun rod for a plurality of times, the equipment transferring and installing time is longer, and the dosage of operators is higher.

For this, patent application No. 201710303338.8, entitled full-segment cleaning device and cleaning method for a steam generator, discloses a cleaning device for a full-segment guide rail for a steam generator, in which nozzles are positioned stepwise along the guide rail direction, and a rigid gun rod assembly is clamped by an actuator air jaw and one or more heat transfer tube pitches are stepped by an actuator screw rod driving rod assembly. In this way, the clamping position of the gun rod assembly needs to be frequently adjusted in the cleaning process due to the accumulation of stepping errors of the screw rod assembly, so that the state of the nozzle jet flow centering pipe gap is ensured. The device is limited by an installation space, is connected in a three-section mode through the flat guide rail, is installed through the guide rail extension rod, and is difficult to install due to insufficient structural reliability at the guide rail interface.

Disclosure of Invention

In view of the above, in order to overcome the defects of the prior art, the invention aims to provide a guide rail mechanism suitable for cleaning a steam generator, which can realize the rapid and stable installation of the guide rail mechanism in one full stroke and the accurate movement and positioning of the cleaning mechanism.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the guide rail mechanism comprises a first guide rail, a second guide rail and a line rail, wherein the first guide rail and the second guide rail are mutually spliced and matched, the line rail is arranged on the first guide rail and the second guide rail, a plurality of positioning holes are formed in the line rail, the distance between adjacent positioning holes is the same as the distance between adjacent heat transfer pipes in the steam generator, and the positioning holes are matched with a proximity sensor on the cleaning mechanism to realize step positioning of the cleaning mechanism; the guide rail mechanism comprises a first clamping assembly and a second clamping assembly which are arranged on the first guide rail and the second guide rail and used for clamping the left part and the right part of the splitter plate in the steam generator respectively.

The first guide rail and the second guide rail are connected through shaft hole type matching and are fixed on the flow dividing plate through the fixed block and the moving block; the linear rail and the positioning hole are processed below the guide rail, the first (long) guide rail and the second (short) guide rail are matched to ensure butt joint flatness, and the plunger hole is processed above the guide rail.

The guide rail mechanism is arranged below the splitter plate of the steam generator, a linear rail for the cleaning mechanism to move is processed on the bottom surface of the guide rail, positioning holes equidistant from the heat transfer tubes are processed on the linear rail, the cleaning mechanism can move along the linear rail, and a proximity sensor is arranged at the middle of the top of the cleaning mechanism; the cleaning mechanism moves equidistantly below the guide rail mechanism through the positioning holes on the proximity sensor and the wire rail.

According to some preferred embodiments of the present invention, the guide rail mechanism includes a first clamping assembly and a second clamping assembly disposed on a first guide rail and a second guide rail, respectively, for clamping left and right parts of a splitter plate in a steam generator, the first clamping assembly including a first fixed block, a first moving block, and a first clamping assembly for driving the first moving block to approach the first fixed block; the second clamping assembly comprises a second fixed block, a second moving block and a second clamping assembly used for driving the first guide rail and the second guide rail to be mutually inserted; the first fixed block, the first movable block, the first clamping assembly and the second fixed block are located on one of the first guide rail and the second guide rail, and the second movable block and the second clamping assembly are located on the remaining one of the first guide rail and the second guide rail.

According to some preferred embodiments of the present invention, the first clamping assembly includes a first slider, a tensioning rail, and a first screw rod, one end of the first screw rod is rotatably connected to the first fixed block, the other end of the first screw rod penetrates through the first slider, a first clamping portion is disposed at a lower portion of the first slider, first sliding grooves are disposed at two sides of the first rail, the first clamping portion is accommodated in the first sliding grooves, a clamping groove is disposed on the tensioning rail, and an upper portion of the first slider is clamped in the clamping groove, and movement of the tensioning rail is achieved through movement of the first slider in the clamping groove.

According to some preferred embodiments of the present invention, a traction frame is disposed at one end of the tensioning guide rail, which is close to the first sliding block, and the traction frame is sleeved on the first moving block; the first guide rail is provided with a second sliding groove corresponding to the first moving block, the lower part of the first moving block is provided with a second clamping part corresponding to the second sliding groove, and the second clamping part is accommodated in the second sliding groove.

According to some preferred embodiments of the invention, the end of the traction frame remote from the tensioning rail is provided with a downwardly extending hook plate for engaging with and hooking the first moving block.

According to some preferred embodiments of the present invention, the tensioning rail is provided with a positioning block, the positioning block is located at one end of the engagement groove away from the traction frame, and the positioning block is used for limiting movement of the first sliding block. The clamping grooves on two sides of the tensioning guide rail are respectively provided with a positioning block, the positioning blocks and the tensioning guide rail are integrally formed, the first sliding blocks are correspondingly provided with grooves, and when the first sliding blocks slide in the clamping grooves, the positioning blocks are clamped in the grooves of the first sliding blocks so as to limit the movement of the first sliding blocks and prevent the first sliding blocks from being separated from the tensioning guide rail.

According to some preferred embodiments of the present invention, the second clamping assembly includes a fastener, a second sliding block, a second screw rod, and a mounting block, one end of the second screw rod is rotatably connected with the mounting block, the other end of the second screw rod penetrates through the second sliding block, a limiting part is arranged at the lower part of the second sliding block, limiting grooves are arranged at two sides of the second guide rail, and the limiting parts are accommodated in the limiting grooves; the fastener and mounting block are used to fixedly mount the second clamping assembly to a hand hole flange of a steam generator.

In some embodiments of the present invention, the second clamping assembly further includes a mounting flange, the mounting flange is matched with a hand hole flange of the steam generator to achieve mounting, the second sliding block and two sides of the second guide rail achieve dovetail groove type sliding fit through a limiting portion and a limiting groove, one end of the screw rod is connected to the mounting block and can rotate freely, the mounting flange is connected to the hand hole flange through a fastening piece such as a bolt, and rotation of the screw rod pushes the second sliding block to drive the second guide rail to insert into the first guide rail, so that fixing of the short guide rail and connection with the long guide rail are achieved.

According to some preferred embodiments of the invention, a camera is arranged at one end of the tensioning guide rail, which is close to the traction frame, the camera is used for visual auxiliary installation, and a wire slot for accommodating a cable on the camera is formed in the tensioning guide rail.

According to some preferred embodiments of the invention, the end of the second rail is provided with a plug-in portion, the end of the first rail is provided with a plug-in hole, and the plug-in portion is accommodated in the plug-in hole to connect the first rail and the second rail.

The invention also provides an installation method of the guide rail mechanism, which comprises the following steps:

a) The method comprises the following steps The first guide rail extends into the steam generator through the hand hole and is hung on a splitter plate of the steam generator through the first fixing block and the second fixing block;

b) The method comprises the following steps The distance between the first sliding block and the first moving block is shortened by using the tensioning guide rail, and the first moving block is locked, so that the first moving block clings to the splitter plate to fix the first guide rail;

c) The method comprises the following steps The second guide rail extends into the steam generator through the other hand hole, the second moving block is firstly hung on the flow dividing plate, and the second guide rail is inserted into the first guide rail for connection;

d) The method comprises the following steps And installing the second clamping assembly, so that the end part of the second guide rail continuously stretches into the end part of the first guide rail, and the connection between the first guide rail and the second guide rail and the fixation between the guide rail mechanism and the splitter plate are realized.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages: the guide rail mechanism suitable for cleaning the steam generator can realize the convenient and stable installation of the guide rail mechanism in one full stroke, and ensure the accurate stepping and positioning of the cleaning mechanism below the full-section guide rail mechanism.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view showing a cleaning apparatus according to a preferred embodiment of the present invention after installation;

FIG. 2 is a front view of a cleaning apparatus in accordance with a preferred embodiment of the present invention;

FIG. 3 is a perspective view of a cleaning apparatus in accordance with a preferred embodiment of the present invention;

FIG. 4 is a schematic view of a rail mechanism in a cleaning apparatus according to a preferred embodiment of the present invention;

FIG. 5 is an enlarged view of section I of FIG. 3;

FIG. 6 is an enlarged view of section II of FIG. 3;

FIG. 7 is an enlarged view of section III of FIG. 3;

FIG. 8 is an enlarged view of section IV of FIG. 3;

FIG. 9 is a perspective view of a second tensioning assembly of the cleaning device of the preferred embodiment of the present invention;

FIG. 10 is another perspective view of a second tensioning assembly of the cleaning device of the preferred embodiment of the present invention;

FIG. 11 is a perspective view of a cleaning mechanism in a cleaning apparatus according to a preferred embodiment of the present invention;

FIG. 12 is another perspective view of the cleaning mechanism in the cleaning apparatus according to the preferred embodiment of the present invention;

FIG. 13 is a perspective view of a high pressure tube turntable mechanism in a cleaning apparatus according to a preferred embodiment of the present invention;

FIG. 14 is a perspective view of an auxiliary roller mechanism in the cleaning apparatus according to the preferred embodiment of the present invention;

FIG. 15 is another perspective view of the auxiliary roller mechanism of the cleaning apparatus according to the preferred embodiment of the present invention;

FIG. 16 is a perspective view of a pull-cord turntable mechanism in a cleaning apparatus according to a preferred embodiment of the present invention;

FIG. 17 is a perspective view of the spacing wheel assembly of the traction rope turntable mechanism in the cleaning device according to the preferred embodiment of the present invention;

in the attached drawings, 1, a guide rail mechanism; 11. a first guide rail; 12. a second guide rail; 131. a first fixed block; 132. a first moving block; 133. a second fixed block; 134. a second moving block; 141. a first clamping assembly; 1411. a first slider; 1412. tensioning the guide rail; 1413. a first screw rod; 1414. a first sliding groove; 1415. a clamping groove; 1416. a traction frame; 1417. a second sliding groove; 1418. a wire slot; 1419. a first camera; 142. a second clamping assembly; 1421. a fastener; 1422. a mounting flange; 1423. a second slider; 1424. a second screw rod; 1425. a mounting block; 1426. a third sliding groove; 1427. a limit groove; 1428. a positioning block; 15. a wire rail; 16. positioning holes;

2. a cleaning mechanism; 21. a frame; 22. a nozzle holder; 23. a nozzle; 24. a first motor; 25. a gear set; 26. a second camera; 27. a proximity sensor; 28. a cable support; 29. a high pressure pipe; 210. a cable; 211. a traction rope; 212 rollers;

3. a high pressure pipe turntable mechanism; 31. a second motor; 32. a high pressure pipe reel; 33. a first reel frame; 34. a rotary joint; 35. a first mounting plate; 351. a first track groove; 36. a transition wheel assembly; 37. a water pipe joint outlet; 38. a first spring plunger;

4. a traction rope turntable mechanism; 41. a third motor; 42. a second reel frame; 43. a traction rope reel; 44. a second spring plunger; 45. a second mounting plate; 451. a second track groove; 46. a spacing wheel assembly; 461. a first limit wheel; 462. the second limiting wheel; 463. the third limiting wheel; 464. a spacing wheel frame; 465. a connecting rod; 466. an adjustment tank;

5. an auxiliary roller mechanism; 511. a fixed frame; 512. a moving frame; 521. a fixed group limiting roller; 522. a mobile group limiting roller; 53. bolt holes; 54. a closure pin assembly; 55. a mounting frame; 56. a guide rail groove; 57. a connecting plate; 58. a third spring plunger;

6. a diverter plate; 7. a steam generator cylinder; 8. hand hole.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

As shown in fig. 1 to 17, the steam generator cleaning device of the present embodiment includes a guide rail mechanism 1, a cleaning mechanism 2, a traction mechanism, a high-pressure pipe turntable mechanism 3, a traction rope turntable mechanism 4, and an auxiliary roller mechanism 5 for supporting a high-pressure pipe 29, the traction mechanism includes a high-pressure pipe 29 and a traction rope 211 respectively located at both sides of the cleaning mechanism 2, the high-pressure pipe 29 is used for supplying water to the cleaning mechanism 2, and the high-pressure pipe turntable mechanism 3 is used for winding the high-pressure pipe 29 to drive the cleaning mechanism 2 to move.

Under the cooperative control of the high-pressure pipe turntable mechanism 3 and the traction rope turntable mechanism 4, the cleaning mechanism 2 moves at equal intervals below the full-section guide rail mechanism 1, displacement is realized by driving the turntable assembly through a proximity switch (a proximity sensor) and a sensing signal of a positioning hole 16 formed in the process of a wire rail below the guide rail, and meanwhile, water flow is visually monitored under the action of a second camera 26, so that the requirement of high-pressure jet cleaning between tube bundles is met, and the cleaning efficiency is better while the cleaning effect is guaranteed. The stepping precision of the cleaning device is better, and the cleaning effect is better; the intelligent degree is higher, the procedure of adding and subtracting the length of the rigid gun is reduced, and the cleaning efficiency is higher; the camera monitors the state of the jet flow in real time to the middle pipe.

The structure of each component is described in detail below:

(1) Guide rail mechanism 1

The guide rail mechanism 1 comprises a first guide rail 11, a second guide rail 12, a wire rail 15, a first clamping assembly and a second clamping assembly, wherein the first guide rail 11 and the second guide rail 12 are mutually spliced and matched, the wire rail 15 is arranged on the first guide rail 11 and the second guide rail 12, the first clamping assembly and the second clamping assembly are respectively used for clamping the left part and the right part of the splitter plate 6 in the steam generator, a plurality of positioning holes 16 are formed in the wire rail 15, and the positioning holes 16 in the embodiment are circular. The distance between adjacent positioning holes 16 is the same as the distance between adjacent heat transfer tubes in the steam generator so that the nozzles 23 on the cleaning mechanism 2 correspond to the midpoints between the adjacent heat transfer tubes; the cleaning mechanism 2 is provided with a proximity sensor 27 for realizing step positioning of the cleaning mechanism 2 in cooperation with the positioning hole 16.

The end of the second guide rail 12 is provided with a plug-in part, the end of the first guide rail 11 is provided with a plug-in hole, the plug-in part is accommodated in the plug-in hole to realize the connection of the first guide rail 11 and the second guide rail 12, namely, the long guide rail and the short guide rail are connected through shaft hole type matching and are fixed on the splitter plate 6 through the clamping assembly. The plug-in part and the plug-in hole are arranged in a corresponding trapezoid structure, so that the plug-in part and the plug-in hole are convenient to insert and support. The integral length of the first guide rail 11 and the second guide rail 12 after being inserted and fixed is larger than the length of the splitter plate 6, namely, the tail ends of the first guide rail 11 and the second guide rail 12 are exposed out of the flange surface of the hand hole 8, so that the first guide rail 11 and the second guide rail 12 are conveniently mounted on the splitter plate 6 on one hand, and a corresponding turntable mechanism is mounted on the other hand. The linear rail 15 and the positioning hole 16 are processed below the guide rail, and the long guide rail and the short guide rail are matched to ensure butt joint flatness.

The first clamping assembly includes a first fixed block 131, a first moving block 132, and a first clamping assembly 141 for driving the first moving block 132 to approach the first fixed block 131. The first clamping assembly 141 includes a first sliding block 1411, a tensioning guide 1412 and a first screw rod 1413, one end of the first screw rod 1413 is rotatably connected with the first fixed block 131, the other end penetrates the first sliding block 1411, a first clamping part is arranged at the lower part of the first sliding block 1411, first sliding grooves 1414 are arranged at two sides of the first guide 11, the first clamping part is accommodated in the first sliding grooves 1414, a clamping groove 1415 is arranged on the tensioning guide 1412, the upper part of the first sliding block 1411 is clamped in the clamping groove 1415, and when the first sliding block 1411 abuts against the end part of the clamping groove 1415, the movement of the tensioning guide 1412 is realized, and then the first sliding block is pulled to the first fixed block. A traction frame 1416 is arranged at one end of the tensioning guide rail 1412, which is close to the first sliding block 1411, and the traction frame 1416 is sleeved on the first moving block 132; the first guide rail 11 is provided with a second sliding groove 1417 corresponding to the first moving block 132, and a lower portion of the first moving block 132 is provided with a second clamping portion corresponding to the second sliding groove 1417, the second clamping portion being accommodated in the second sliding groove 1417.

As shown in fig. 5, in order to achieve the stability of the tensioning rail 1412 when tensioning the first moving block 132 in this embodiment, a positioning block 1428 is disposed on the tensioning rail 1412, a groove is correspondingly formed in the first sliding block 1411, the positioning block 1428 is located at one end of the engagement groove 1415 away from the traction frame 1416, and the positioning block 1428 is used for limiting the movement of the first sliding block. The locking grooves 1415 on both sides of the tensioning guide 1416 are provided with positioning blocks 1428. The positioning block 1428 and the tensioning guide rail 1412 are integrally formed, and a groove is formed in the first sliding block 1411 corresponding to the positioning block 1428, when the first sliding block 1411 slides in the clamping groove, the positioning block 1428 is clamped in the groove of the first sliding block 1411, so that movement of the first sliding block 1411 is limited, and the first sliding block 1411 is prevented from being separated from the tensioning guide rail 1412.

The tensioning rail 1412 in this embodiment is provided with a first camera 1419 near one end of the traction frame 1416, and is used for the installation of the traction frame and the first moving block in a sleeving manner to provide visual assistance so as to facilitate quick installation, and the tensioning rail 1412 is further provided with a wire slot 1418 for accommodating a cable on the first camera 1419. The end of the traction frame 1416 far away from the tensioning rail 1412 in this embodiment is provided with a hook plate extending downward, which is used to attach to the first moving block 132 and hook the first moving block 132, so as to prevent the traction frame 1416 from being detached from the first moving block 132, as shown in fig. 6.

The second clamping assembly includes a second fixed block 133, a second moving block 134, and a second clamping assembly 142 for driving the first rail 11 and the second rail 12 to be inserted into each other. The first fixed block 131, the first moving block 132, the first clamping assembly 141 and the second fixed block 133 are located on the first guide rail 11, the second moving block 134 and the second clamping assembly 142 are located on the second guide rail 12, the second moving block 134 is hung on the splitter plate to provide a supporting point when the second guide rail 12 is installed, and the third sliding grooves 1426 for the second moving block 134 to move are formed in two sides of the second guide rail 12. The second clamping assembly 142 comprises a fastener 1421, a second sliding block 1423, a second screw rod 1424, a mounting block 1425 and a mounting flange 1422, one end of the second screw rod 1424 is rotationally connected with the mounting block 1425, the other end penetrates through the second sliding block 1423, a limiting part is arranged at the lower part of the second sliding block 1423, limiting grooves 1427 are arranged at two sides of the second guide rail 12, and the limiting part is accommodated in the limiting grooves 1427; the fasteners 1421 and mounting blocks 1425 are used to fixedly mount the second clamping assembly 142 to the hand hole 8 flange of the steam generator. In some embodiments, the mounting flange 1422 and the mounting block 1425 may also be integrally formed.

The mounting flange 1422 is matched with a hand hole 8 flange of the steam generator cylinder 7 to realize mounting, two sides of the second sliding block 1423 and the second guide rail 12 are in dovetail groove type sliding fit through the limiting part and the limiting groove 1427, one end of the second screw rod 1424 is connected to the mounting block 1425 and can rotate freely, the mounting flange 1422 is connected to the hand hole 8 flange through a fastening piece 1421 such as a bolt, the second screw rod 1424 rotates to push the second sliding block 1423 to move, and when the second sliding block 1423 abuts against the end part of the limiting groove 1427, the second guide rail 12 is driven to be inserted into the first guide rail 11, and therefore the fixing of the short guide rail and the connection with the long guide rail are realized.

The high-pressure pipe turntable mechanism 3 is arranged at one end of the first guide rail 11, which is far away from the plug hole, and the auxiliary roller mechanism 5 is arranged between the high-pressure pipe turntable mechanism 3 and the first clamping component 141; the traction rope turntable mechanism 4 is arranged at one end of the second guide rail 12 away from the plug-in part, and the second clamping assembly 142 is arranged between the traction rope turntable mechanism 4 and the plug-in part.

According to the nuclear power station steam generator cleaning device, under the assistance of the sensor assembly, the cleaning mechanism 2 can achieve accurate positioning required for cleaning, and cleaning efficiency is better while cleaning effect is guaranteed. The first guide rail 11 and the second guide rail 12 are connected through shaft hole type matching and are fixed on the splitter plate 6 through a fixed block and a movable block; the linear rail 15 and the positioning hole 16 are processed below the guide rails, the first (long) guide rail and the second (short) guide rail are matched to ensure butt joint flatness, and the plunger hole is processed above the guide rails.

The guide rail mechanism 1 is arranged below the splitter plate 6 of the steam generator, a wire rail 15 for the cleaning mechanism 2 to move is processed on the bottom surface of the guide rail, a positioning hole 16 equidistant from the heat transfer pipe is processed on the wire rail 15, the cleaning mechanism 2 can move along the wire rail 15, a proximity sensor 27 is arranged in the middle of the top of the cleaning mechanism, one end of the proximity sensor 27 is connected with a traction rope 211 turntable, the other end of the proximity sensor 27 is connected with a high-pressure pipe turntable mechanism 3, the traction cleaning mechanism 2 moves equidistantly below the guide rail mechanism 1 under the cooperative control of the traction rope 211 turntable and the high-pressure pipe turntable mechanism 3, and an auxiliary roller mechanism 5 is used for limiting the moving path of the high-pressure pipe 29 and guaranteeing the reliability of turntable movement.

(2) Cleaning mechanism 2

The cleaning mechanism 2 comprises a frame 21, a nozzle frame 22 and a cable support 28 which are arranged on the frame 21, a roller 212, a first driving component for driving the nozzle frame 22 to rotate, and a second camera 26, and all parts are arranged on the frame 21. The proximity switch is provided on the top of the frame 21 and is provided corresponding to the positioning hole 16 on the wire rail 15, and a plurality of rollers 212 are provided on both sides of the wire rail 15 for moving the cleaning mechanism 2 along the wire rail 15.

The first driving assembly comprises a first motor 24 and a gear set 25, the gear set 25 is driven to rotate through the first motor 24 so as to drive the nozzle frame 22 to rotate, the nozzle 23 is installed in the nozzle frame 22, one end of the frame 21 is connected with a high-voltage tube 29, the other end of the frame 21 is connected with a cable 210 and a traction rope 211, the cable 210 is fixed through a cable bracket 28, two groups of 4 rollers 212 are installed on the upper end face of the frame 21 so as to clamp the wire rail 15, and the proximity switch 27 is installed on the upper end face of the frame 21 and is arranged in the middle corresponding to the position of the positioning hole 16.

(3) High-pressure pipe turntable mechanism 3

The high-pressure pipe turntable mechanism 3 comprises a high-pressure pipe reel 32, a first reel frame 33, a water pipe joint outlet 37, a rotary joint 34, a first installation component and a second driving component for driving the high-pressure pipe reel 32 to rotate, a through hole is formed in the high-pressure pipe reel 32, one end of the high-pressure pipe 29 is connected with the nozzle frame 22, the other end of the high-pressure pipe 29 penetrates through the through hole and the water pipe joint outlet 37 and then is connected with the rotary joint 34, and the first installation component is used for fixing the high-pressure pipe turntable mechanism 3 on the first guide rail 11.

The first mounting assembly comprises a first mounting plate 35, a first spring plunger 38 and a transition wheel assembly 36, and a first track groove 351 matched with the appearance of the first guide rail 11 is formed in the first mounting plate 35; the high-pressure pipe 29 is wound on a high-pressure pipe reel 32, passes through a through hole on the reel to a water pipe joint outlet 37 and is connected with a rotary joint 34, and the other end of the rotary joint 34 is connected with the high-pressure pipe 29 at the pump end; the other end of the high-pressure pipe 29 is connected with the cleaning mechanism 2; the first mounting plate 35 is arranged below the reel frame 33 and is connected with the first long guide rail through a first spring plunger 38 on the first mounting plate 35; the second driving assembly comprises a second motor 31 and a shaft coupling, the second motor 31 drives the high-pressure pipe reel 32 to drive the high-pressure pipe 29 to be retracted and released, the second motor 31 is connected with the reel rotating shaft through an elastic shaft coupling, and the shaft coupling is disconnected when manual retraction and release are needed; when the automatic folding and unfolding is needed, the shaft coupling is connected. The transition wheel assembly 36 includes a transition frame and a transition wheel disposed therein for supporting the high pressure tube 29 for providing a limit for the high pressure tube 29 before entering the spool and for ensuring proper spool operation.

(4) Traction rope turntable mechanism 4

The traction rope turntable mechanism 4 comprises a traction rope reel 43, a second reel frame 42, a second installation component and a third driving component for driving the traction rope reel 43 to rotate, wherein the second installation component is provided with a limiting wheel component 46, the limiting wheel component 46 comprises a limiting wheel frame 464 and a first limiting wheel 461, a second limiting wheel 462 and a third limiting wheel 463 which are sequentially arranged in the limiting wheel frame 464, a first limiting opening for the traction rope 211 to pass through is formed between the first limiting wheel 461 and the second limiting wheel 462, and a second limiting opening for the cable 210 to pass through is formed between the second limiting wheel 462 and the third limiting wheel 463. The first and second spacing wheels 461 and 462 are integrally formed by the connecting rod 465, and the spacing wheel frame 464 is provided with an adjusting groove 466 for the connecting rod 465 to move up and down. The first and second spacing wheels 461 and 462 in the spacing wheel assembly 46 enable adjustment of the position in the up-down direction to limit the escape of the cable 210, the first spacing wheel 461 being mounted with a tension sensor.

Similar to the first mounting assembly, the second mounting assembly also includes a second mounting plate 45 and a second spring plunger 44, the second mounting plate 45 having a second track groove 451 formed therein that matches the profile of the second rail 12. The third drive assembly includes a third motor 41. One end of the traction rope 211 passes through the traction rope reel 43 and is wound on the traction rope reel 43, the traction rope reel 43 is mounted on the traction rope reel frame 43 and is wound under the drive of the third motor 41, and the other end of the traction rope 211 is connected with the cleaning robot; a second mounting plate 45 is mounted below the haulage rope reel frame and can be connected to the short guide rail, and a second spring plunger 44 is used for quick mounting and limiting.

(5) Auxiliary roller mechanism 5

The auxiliary roller mechanism 5 includes a fixed frame 511, a moving frame 512 moving relative to the fixed frame 511, an adjusting assembly provided between the fixed frame 511 and the moving frame 512, a limiting roller provided on the moving frame 512 or the fixed frame 511, a closing pin assembly 54, a mounting frame assembly, and limiting rollers 522 on the moving frame 512 and limiting rollers 521 on the fixed frame 511 are respectively located at both sides of the high pressure pipe 29 for limiting the movement of the high pressure pipe 29.

The adjusting assembly comprises an adjusting bolt and an elastic piece which are arranged in a bolt hole 53 between the fixed frame 511 and the movable frame 512, wherein the limiting rollers are divided into a fixed group limiting roller 521 arranged on the fixed frame 511 and a movable group limiting roller 522 arranged on the movable frame 512, and a connecting plate 57 is connected below the fixed group and the movable group rollers. The high-pressure pipe 29 passes through the space between the fixed group roller (521) and the movable group roller (522), and for the convenience of installation, the gap between the fixed group limit roller 521 and the movable group limit roller 522 is adjusted through an adjusting bolt and an elastic piece, so that the high-pressure pipe 29 is ensured to be in contact with the rollers 212 on both sides, and the high-pressure pipe is locked through the closed pin assembly 54 after being adjusted in place; the mounting frame assembly comprises a mounting frame 55 and a third spring plunger 58 thereon, the upper part of the fixed frame 511 is provided with a guide rail groove 56 matched with the shape of the first rail, and the fixed frame 511 is sleeved on the first guide rail 11 through the guide rail groove 56 and is fast mounted and fixed with the long guide rail through the matching of the spring plunger on the mounting frame 55 and the shaft hole of the plunger hole.

Preferably, a circulation tool is arranged at the flange of the hand hole 8, and the circulation tool has the function of forming an annular water flow along the inner wall of the steam generator to drive the sludge water flowing out from the pipe through high-pressure water cleaning to the suction port so as to form a closed water circulation loop. The circulation tool can adopt the prior art in application number 201710303338.8; meanwhile, temporary sealing plates are arranged for temporarily blocking hand holes in the flushing process, so that foreign matters are prevented from being introduced and water mist is prevented from overflowing from the inside of the steam generator.

The cleaning device also comprises a guy trolley when in installation and use, the guy trolley is provided with rollers which are the same as the upper part of the cleaning mechanism, the high-pressure pipe joint or the cable joint is carried by the clamping mechanism, and the joint is sent from one hand hole to the other hand hole by the guy trolley under the pushing of the two-section type quick threaded steel bars. And then the guy trolley and the steel bars are respectively taken out from the two hand holes, and the high-pressure pipe joint or the cable joint is connected to the cleaning mechanism, so that the cleaning mechanism can start to pull and step on the guide rail mechanism.

The guide rail mechanism is installed as follows:

STEP1: a first guide rail is arranged in a hand hole with large external space, and is hung on the flow dividing plate through a first fixed block and a second fixed block, and one end of the first guide rail can be used as an installation handle for convenient installation;

STEP2: the first sliding block is shortened from the first moving block by using the tensioning guide rail and locked, so that the first moving block is tightly attached to the splitter plate to fix the first guide rail;

STEP3: a second guide rail is arranged at the other hand hole, a second moving block is firstly hung on the splitter plate, the second guide rail is inserted into the first guide rail for connection, and then a second clamping assembly is arranged, so that the end part of the second guide rail continuously stretches into the end part of the first guide rail, and the fit and the fixation between the guide rails are realized;

the working procedure of the steam generator cleaning device in this embodiment is briefly described below:

STEP1: the guide rail mechanism is arranged on the flow dividing plate and is fixed through the first clamping component and the second clamping component;

STEP2: the connection between the high-pressure pipe and the cleaning structure is completed through the wire pulling trolley, and the cleaning mechanism is arranged at the initial position of the wire rail;

STEP3: connecting the cable to a control system; connecting a water inlet of the high-pressure pipe turntable mechanism to a water outlet of the pump end;

STEP4: starting the cleaning device through the control system, starting the high-pressure pipe turntable mechanism to rotate and pull the cleaning mechanism until the proximity sensor senses the first positioning hole, stopping pulling, and starting the nozzle to clean the heat transfer pipe according to a preset rotating range and times according to a preset program;

STEP5: after cleaning of a certain pipe is finished, automatically starting the high-pressure pipe turntable mechanism to rotate until the proximity sensor senses that the positioning hole stops pulling again, starting cleaning, and keeping the pulling rope in a tensioning state under the action of the tension sensor through the motor in the pulling process;

STEP6: STEP5 is repeated to complete the cleaning between all the tubes, after which the parts of the cleaning device are removed and the corresponding parts are removed from the hand hole.

Aiming at the problems that a rigid gun rod used in the existing cleaning device for the steam generator at home and abroad is changed in position, has poor stepping precision, cannot be monitored in real time and the like in the working process of a cleaning mechanism, the invention aims at improving the use safety and the positioning accuracy, is visualized, and adopts the following technical scheme: the structure for realizing stepping of the cleaning mechanism on the guide rail based on traction of the soft high-pressure pipe and the traction rope is designed, the high-pressure pipe and the traction rope are respectively wound on respective reels, and the reels are arranged at two ends of the cleaning guide rail; accurate stepping of the cleaning mechanism is realized based on a mode of combining the proximity switch and the camera, hole sites which can be perceived by the proximity switch and are equidistant from the heat transfer pipe are processed on the guide rail substrate, and signals are sent out through the perception of the hole sites to control rotation and stop of the high-pressure water pipe, so that the stepping of the cleaning mechanism on the guide rail is realized; performing real-time verification through the image of the second camera, and rotating the high-pressure water pipe to adjust if necessary; the use of an auxiliary wheel system and tension sensor ensures that the high pressure tube and the traction rope are not wound while being able to perform in place at the required distance.

The invention relates to a steam generator cleaning device which comprises a guide rail mechanism, a cleaning mechanism, a high-pressure pipe turntable mechanism, a traction rope turntable mechanism and an auxiliary roller mechanism. The full-section type guide rail mechanism is arranged below the splitter plate of the steam generator, a wire rail for the cleaning mechanism to move is processed on the bottom surface of the guide rail, a positioning hole equidistant from the heat transfer pipe is processed on the wire rail, the cleaning mechanism is arranged on the wire rail, a proximity switch is arranged in the cleaning mechanism in the middle, one end of the cleaning mechanism is connected with the traction rope, the other end of the cleaning mechanism is connected with the high-pressure pipe, the cleaning mechanism is pulled to move at equal intervals below the full-section type guide rail mechanism through cooperative control of the traction rope turntable and the high-pressure pipe turntable mechanism, and the auxiliary roller mechanism is used for limiting the moving path of the high-pressure pipe and guaranteeing the reliability of the turntable movement; the motion of the high-pressure pipe turntable mechanism is controlled through a mode of sensing a positioning hole on a wire rail by a proximity switch, the traction rope turntable mechanism is cooperatively controlled, the stable state of the cleaning mechanism on the guide rail is guaranteed, the positioning accuracy of the cleaning mechanism is improved, the nozzle can be driven to realize accurate displacement and visual monitoring, the cleaning effect is guaranteed, the replacement of a rigid gun in the cleaning process is reduced, the cleaning efficiency is higher, and the illuminated dose of personnel operating on site is reduced.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims (6)

1. The guide rail mechanism is characterized by comprising a first guide rail, a second guide rail and a line rail, wherein the first guide rail and the second guide rail are mutually spliced and matched, the line rail is arranged on the first guide rail and the second guide rail, a plurality of positioning holes are formed in the line rail, the distance between adjacent positioning holes is the same as the distance between adjacent heat transfer pipes in the steam generator, and the positioning holes are matched with a proximity sensor on the cleaning mechanism to realize step positioning of the cleaning mechanism; the guide rail mechanism comprises a first clamping assembly and a second clamping assembly which are arranged on the first guide rail and the second guide rail and are used for clamping the left part and the right part of the splitter plate in the steam generator respectively;

the first clamping assembly comprises a first fixed block, a first moving block and a first clamping assembly used for driving the first moving block to be close to the first fixed block; the second clamping assembly comprises a second fixed block, a second moving block and a second clamping assembly used for driving the first guide rail and the second guide rail to be mutually inserted; the first fixed block, the first moving block, the first clamping assembly and the second fixed block are positioned on one of the first guide rail and the second guide rail, and the second moving block and the second clamping assembly are positioned on the rest one of the first guide rail and the second guide rail; the first clamping assembly comprises a first sliding block, a tensioning guide rail and a first screw rod, one end of the first screw rod is rotationally connected with the first fixed block, the other end of the first screw rod penetrates through the first sliding block, a first clamping part is arranged at the lower part of the first sliding block, first sliding grooves are formed in two sides of the first guide rail, the first clamping part is contained in the first sliding grooves, a clamping groove is formed in the tensioning guide rail, the upper part of the first sliding block is clamped in the clamping groove, and the movement of the tensioning guide rail is realized through the movement of the first sliding block in the clamping groove; a traction frame is arranged at one end of the tensioning guide rail, which is close to the first sliding block, and the traction frame is sleeved on the first moving block; the first guide rail is provided with a second sliding groove corresponding to the first moving block, the lower part of the first moving block is provided with a second clamping part corresponding to the second sliding groove, and the second clamping part is accommodated in the second sliding groove;

the second clamping assembly comprises a fastener, a second sliding block, a second screw rod and a mounting block, one end of the second screw rod is rotationally connected with the mounting block, the other end of the second screw rod penetrates through the second sliding block, a limiting part is arranged at the lower part of the second sliding block, limiting grooves are formed in two sides of the second guide rail, and the limiting parts are accommodated in the limiting grooves; the fastener and mounting block are used to fixedly mount the second clamping assembly to a hand hole flange of a steam generator.

2. The guide rail mechanism of claim 1, wherein an end of the traction frame remote from the tension guide rail is provided with a downwardly extending hook plate for engaging and hooking the first moving block.

3. The guide rail mechanism of claim 1, wherein the tensioning guide rail is provided with a positioning block, the positioning block is located at one end of the clamping groove away from the traction frame, and the positioning block is used for limiting movement of the first sliding block.

4. The guide rail mechanism of claim 1, wherein a camera is arranged at one end of the tensioning guide rail, which is close to the traction frame, and the camera is used for visual auxiliary installation, and a wire slot for accommodating a cable on the camera is formed in the tensioning guide rail.

5. The guide rail mechanism according to claim 2, wherein an end portion of the second guide rail is provided with a plug-in portion, and an end portion of the first guide rail is provided with a plug-in hole, and the plug-in portion is accommodated in the plug-in hole to achieve connection of the first guide rail and the second guide rail.

6. A method of installing a rail mechanism according to any one of claims 1 to 5, comprising the steps of:

a) The method comprises the following steps The first guide rail extends into the steam generator through the hand hole and is hung on a splitter plate of the steam generator through the first fixing block and the second fixing block;

b) The method comprises the following steps The distance between the first sliding block and the first moving block is shortened by using the tensioning guide rail, and the first moving block is locked, so that the first moving block clings to the splitter plate to fix the first guide rail;

c) The method comprises the following steps The second guide rail extends into the steam generator through the other hand hole, the second moving block is firstly hung on the flow dividing plate, and the second guide rail is inserted into the first guide rail for connection;

d) The method comprises the following steps And installing the second clamping assembly, so that the end part of the second guide rail continuously stretches into the end part of the first guide rail, and the connection between the first guide rail and the second guide rail and the fixation between the guide rail mechanism and the splitter plate are realized.