CN114199072B - Direct-injection flushing device in secondary side of nuclear power station evaporator and flushing equipment - Google Patents

Abstract

The invention relates to a direct-injection flushing device and flushing equipment in the secondary side of an evaporator of a nuclear power station, wherein the direct-injection flushing device comprises a base, a spray gun mechanism and a swinging driving mechanism, the spray gun mechanism is arranged on the left side and the right side of the base, a water pipe interface, a rotary interface and an internal water channel are arranged in the base, the spray gun mechanism comprises two rotary spray gun seats with water paths inside, a plurality of direct spray guns fixedly connected to the rotary spray gun seats and a rotary joint, the direct spray guns are communicated with the water paths inside the rotary spray gun seats, the rotary spray gun seats are connected to the rotary interface through the rotary joint, the water paths inside the rotary spray gun seats are communicated with the rotary interface through the rotary joint, the rotary spray gun seats can rotate up and down around the rotary joint, and the spraying direction of the direct spray guns is vertical to the front and rear directions; the swing driving mechanism is connected with the rotary spray gun seat and drives the rotary spray gun seat to rotate up and down.

Description

Direct-injection flushing device in secondary side of nuclear power station evaporator and flushing equipment

Technical Field

The invention relates to the field of nuclear power station equipment cleaning, in particular to a direct-injection flushing device in a secondary side of a nuclear power station evaporator and flushing equipment.

Background

In the operation of the steam generator of the nuclear power plant, as the water on the secondary side of the evaporator (the secondary side of the steam generator) contains various chemical additives, corrosion products and impurities, the water contains charged metal ions and certain anions, alkali or salt 02 with low solubility is formed by combining with each other, dirt or sludge is formed, and the dirt or sludge is deposited on the surface, the tube plate and the supporting plate of the heat transfer tube in the secondary side of the evaporator and can be stuffed in the holes of the heat transfer tube and the supporting plate. The mud residue in the secondary side of the evaporator can reduce the heat conductivity of the heat transfer tube, cause corrosion and even leakage of the heat transfer tube, and especially the gap between the heat transfer tube and the support plate is easy to generate stress corrosion cracks, pitting corrosion and thinning, and the water level of the secondary side is unstable and vapor pressure is reduced. Therefore, during each overhaul of the nuclear power plant, the evaporator secondary side sludge is cleaned. The existing cleaning method comprises chemical cleaning, bubbling cleaning, upper tube bundle spraying cleaning, high-pressure water jet tube plate flushing and the like. After theoretical calculation and long-term practical examination, about 30% -40% of sludge is found to be deposited on the heat transfer tubes and tube plates on the secondary side of the evaporator, so that high-pressure water jet tube plate cleaning technology is widely used at present in each large nuclear power plant, and the following defects exist: on the one hand, because the pollution in the secondary side of the evaporator is large, the space between the heat transfer tubes is small, workers cannot enter during the cleaning process, and generally, the cleaning operation can only be carried out from the outside and is unchanged; on the other hand, the heat transfer tube has a certain length, the high-pressure water spraying direction is fixed in the existing flushing method, the cleaning range in the length direction of the heat transfer tube is limited, and the complete cleaning is difficult to complete.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention is to provide a direct-injection flushing device and a flushing device in a secondary side of an evaporator of a nuclear power station, which can be placed between heat transfer tubes to flush the heat transfer tubes directly and effectively, and the spray gun can swing up and down, so that the flushing range is wide, and the use is flexible and convenient.

In order to achieve the above purpose, the invention provides a direct-injection flushing device in the secondary side of an evaporator of a nuclear power station, wherein a plurality of heat transfer tube transverse rows are arranged in the secondary side of the evaporator, each heat transfer tube transverse row comprises a plurality of heat transfer tubes which are distributed along the transverse direction at equal intervals, the direct-injection flushing device comprises a base, a spray gun mechanism and a swinging driving mechanism, the spray gun mechanism is arranged on the left side and the right side of the base, a water pipe interface, a rotary interface and an internal water channel which is communicated with the water pipe interface and the rotary interface are arranged in the base, the spray gun mechanism comprises two rotary spray gun seats, a plurality of direct spray guns and a rotary joint, wherein the rotary spray gun seats are internally provided with waterways, the direct spray guns are fixedly connected to the rotary spray gun seats, the rotary spray gun seats are connected to the rotary interface through the rotary joint, the waterways inside the rotary spray gun seats are communicated with the rotary interface through the rotary joint, the rotary spray gun seats can rotate up and down around the rotary joint, and the spray direction of the direct spray guns is vertical to the front and back directions; the swing driving mechanism is connected with the rotary spray gun seat and drives the rotary spray gun seat to rotate up and down; the direct-injection flushing device is used for being placed between two adjacent heat transfer tube transverse rows, and the front-back direction of the direct-injection flushing device is along the transverse arrangement direction of the heat transfer tube transverse rows, and the up-down direction is along the length direction of the heat transfer tubes.

Further, a plurality of straight spray guns in the spray gun mechanism are arranged along the front-back direction, and the spacing between the straight spray guns is one or more times of the spacing between the heat transfer tubes in the transverse rows of the heat transfer tubes.

Further, the device also comprises a detection mechanism, wherein the detection mechanism comprises an induction block fixed with the rotary spray gun seat and a proximity sensor for detecting the position of the induction block.

Further, the swing driving mechanism comprises a swing connecting block, a lifting driving component for driving the swing connecting block to move up and down, and a connecting rod component for connecting and driving the swing connecting block and the rotary spray gun seat, wherein the connecting rod component comprises a swing rod with one end fixedly connected with the rotary spray gun seat and a swing connecting rod with one end hinged with the swing rod, and the other end of the swing connecting rod is hinged with the swing connecting block.

Further, the swing driving mechanism further comprises a lifting guide assembly, the lifting guide assembly comprises a lifting guide rod and a lifting guide plate which is installed on the lifting guide rod in an up-down sliding mode, and the swing connecting block is fixed on the lifting guide plate.

Further, the lifting driving assembly comprises a pneumatic motor, a driving shaft, an intermediate transmission structure for connecting the pneumatic motor and the driving shaft, and a cam transmission structure arranged at one end of the driving shaft, wherein the cam transmission structure comprises a cam eccentric plate fixed on the driving shaft, a cam bearing fixed on the cam eccentric plate, and a cam runner plate with a strip-shaped runner, and the cam bearing is positioned in the strip-shaped runner.

The invention also provides flushing equipment in the secondary side of the evaporator of the nuclear power station, which is used for entering the secondary side of the evaporator to flush, wherein the secondary side of the evaporator is internally provided with a plurality of heat transfer tube transverse rows which are parallel to each other, each heat transfer tube transverse row comprises a plurality of heat transfer tubes which are distributed along the transverse direction at equal intervals, the flushing equipment comprises a cableway device, a trolley device, a travelling device and a control system, the cableway device comprises two transverse cables which are arranged in the secondary side of the evaporator, the two cables are positioned between the two adjacent heat transfer tube transverse rows, the trolley device is movably arranged on the cables, and the travelling device is fixedly arranged on the trolley device; the direct-injection flushing device is arranged on the trolley device and is fixedly connected with the travelling device, the front-back direction of the direct-injection flushing device is along the extending direction of the cable, and the travelling device drives the trolley device and the direct-injection flushing device to move back and forth on the cable; the control system is in control connection with the running gear, and is also in control connection with the swing driving mechanism of the direct-injection flushing device.

Further, the cableway device further comprises a fixing component and a tensioning component which are respectively and fixedly connected to two sides of the outer wall of the steam generator, one end of the cable is fixed in the fixing component, the other end of the cable is installed in the tensioning component, and the tensioning component can pull the cable to be tensioned.

Further, the fixing assembly comprises a cable backing plate, the cable backing plate is provided with a semi-annular mounting groove, and one ends of two cables are connected into a whole and are embedded in the mounting groove of the cable backing plate; the tensioning assembly includes a clamping structure in which one end of the cable is clamped, and an adjustment structure that drives the clamping structure toward or away from the steam generator.

Further, the dolly device includes two dolly components that the relative setting around, and the dolly component includes the automobile body and sets up the gyro wheel structure in the automobile body left and right sides, and two gyro wheel structures cooperate with two cables respectively, the gyro wheel structure is including putting the horizontal gyro wheel in cable upside and support at cable left side or right side's vertical gyro wheel, have the spacing space that is used for the cable to pass between horizontal gyro wheel, vertical gyro wheel and the automobile body.

As described above, the direct-injection flushing device and flushing equipment according to the present invention have the following advantages:

through setting up base, spray gun mechanism and swing actuating mechanism, directly spout the bath device, when using, lay directly spouting the bath device between two adjacent heat transfer tube horizontal rows earlier, fixed through certain mode. The spray gun mechanisms at the left side and the right side of the direct-injection flushing device respectively flush the heat transfer tubes in the two heat transfer tube transverse rows, the direct-injection spray gun is aligned to the left side or the right side of the heat transfer tube, high-pressure water enters an internal water channel of the base from the water tube connector, passes through the rotary connector and the rotary connector, passes through a water channel in the rotary spray gun seat, and finally is sprayed out of the direct-injection spray gun, and the front side and the rear side of the heat transfer tube are flushed under high pressure. Meanwhile, in the water spraying process, the rotary spray gun seat is driven to vertically rotate through the swing driving mechanism, and the rotary spray gun seat drives the straight spray gun to vertically swing, so that the flushing range of the straight spray gun is enlarged vertically, and the flushing and cleaning range of the heat transfer pipe can be effectively increased. The flushing equipment can enter between the heat transfer tubes in the secondary side of the evaporator, so that the direct-injection flushing device can directly and effectively flush the surfaces of the heat transfer tubes at different positions, particularly when the heat transfer tubes are in between, the heat transfer tubes can be flushed towards the front side and the rear side of the direct-injection flushing device, the spray gun can swing up and down, the flushing range is large, and the use is flexible and convenient. .

Drawings

Fig. 1 is a schematic structural view of a direct-jet flushing device of the present invention.

Fig. 2 is a schematic structural view of a portion of a swing driving mechanism in the direct-injection flushing device of the present invention.

Fig. 3 is a schematic view of a part of a cam transmission structure in the direct-injection flushing device of the present invention.

Fig. 4 is a schematic view of a part of a cam transmission structure in the direct-injection flushing device of the present invention.

Fig. 5 is a schematic structural view of a spray gun mechanism in the direct-injection flushing device of the present invention.

Fig. 6 is a schematic diagram illustrating the operation of the direct-jet flushing device of the present invention.

Fig. 7 is a schematic structural view of the washing water apparatus of the present invention.

Fig. 8 is a schematic view of a part of the structure of the washing water apparatus of the present invention.

Fig. 9 is a schematic structural view of a fixing assembly of the cableway device according to the present invention.

Fig. 10 is a schematic view of the tensioning assembly of the cableway device of the present invention.

Fig. 11 is a schematic structural view of the supporting rod in the cableway device according to the present invention.

Fig. 12 is a schematic structural view of the cart device of the present invention.

Fig. 13 is a schematic structural view of the running gear of the present invention.

Fig. 14 is an exploded view of the structure of the running gear of the present invention.

Fig. 15 is a schematic structural view of a stepping drive mechanism of a traveling device according to the present invention.

Fig. 16 is a schematic structural view of a clamping and supporting mechanism of the running gear of the present invention.

Fig. 17 is a schematic view of the installation of the flushing device of the present invention.

Fig. 18 is a schematic diagram of the operation of the flushing device of the present invention.

Fig. 19 is a schematic view showing the operation of installing the running gear between heat transfer pipes in the present invention.

Description of element reference numerals

1. Cableway device

11. Cable rope

12. Cable tie plate

13. Support flange

14. Support end plate

15. Support bar

15a threaded joint

16. Nylon bolt

17. Fixing plate

18. Clamping plate

19. Screw ejector rod

2. Trolley device

21. Lower saddle

22. Upper saddle

23. Vertical roller

24. Transverse roller

25. Conical locating pin

3. Walking device

31. Step-by-step actuating mechanism

31a step slider

31b step-by-step driving cylinder

31c step slide bar

31d slide bar fixing seat

31 and e Y type connecting rod

31f support slide bar clamping plate

32. Clamping and supporting mechanism

32a substrate

32b baffle

32c cover plate

32d corrugated block fixing seat

32e support corrugated block

32f limit groove

32g clamping driving cylinder

32h clamping driving piston rod

32i clamping driving slide block

32j clamping driving connecting rod

32k Y type connecting block

32l linear bearing

Guide rod of about 32m

32n left and right guide seat

32o front-rear fixing seat

32p front and rear rod clamping plate

32q front and rear guide rod

32r hinge shaft

33. Trolley connecting block

34. Flushing connection block

4. Evaporator simulator

5. Direct-injection flushing device

51. Base seat

52. Water pipe joint

53a straight spray gun

53b rotary spray gun base

54a pneumatic motor

54b motor connecting plate

54c speed reducer

54d speed reducer support

54e gear

54f shaft support

54g drive shaft

54h cam runner plate

54i strip chute

54j cam bearing

54k cam eccentric plate

54l gear bearing seat

54m gear protective cover

54n lifting guide rod

54-degree lifting guide plate

54p swing connecting block

54q swing rod

54r swing link

54s hinge shaft

56a proximity sensor

56b sensor support

57. First connecting block

58. Second connecting block

6. Hand hole flange surface

7. Evaporator secondary side

8. Heat transfer tube row

81. Heat transfer tube

Detailed Description

Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper", "lower", "left", "right", "middle", etc. are used herein for convenience of description, but are not to be construed as limiting the scope of the invention, and the relative changes or modifications are not to be construed as essential to the scope of the invention.

Referring to fig. 1 to 6, the present application provides a direct-injection flushing device 5 in a secondary side of an evaporator of a nuclear power plant, referring to fig. 18, heat transfer tubes 81 in the secondary side 7 of the evaporator are arranged in a rectangular array, in the present application, for convenience of explanation, one array direction is taken as a transverse direction, the other array direction is taken as a longitudinal direction, the length direction of the heat transfer tubes 81 is taken as a vertical direction, a transverse row of heat transfer tubes 81 forms a transverse row 8 of heat transfer tubes, and then a plurality of mutually parallel transverse rows 8 of heat transfer tubes are arranged in the secondary side 7 of the evaporator along the longitudinal direction, and the transverse row 8 of heat transfer tubes comprises a plurality of heat transfer tubes 81 arranged at equal intervals along the transverse direction.

Referring to fig. 1 to 6, the direct-injection flushing device 5 of the present application comprises a base 51, a spray gun mechanism, and a swing driving mechanism, wherein the spray gun mechanism is provided on both left and right sides of the base 51, a water pipe connector (not shown in the drawing), a rotary connector (not shown in the drawing), and an internal water channel (not shown in the drawing) communicating the water pipe connector and the rotary connector are provided in the base 51, the spray gun mechanism comprises two rotary spray gun seats 53b having a water channel therein, a plurality of direct spray guns 53a fixedly connected to the rotary spray gun seats 53b, and a rotary connector (not shown in the drawing), the direct spray guns 53a are communicated with the water channel inside the rotary spray gun seats 53b, the rotary spray gun seats 53b are connected to the rotary connector through the rotary connector, the rotary spray gun seats 53b can rotate up and down around the rotary connector, and the spray direction of the direct spray guns 53a is perpendicular to the front-rear direction; the swing driving mechanism is connected with the rotary spray gun seat 53b and drives the rotary spray gun seat 53b to rotate up and down; the direct-injection flushing device 5 is arranged between two adjacent heat transfer tube transverse rows 8, and the front-back direction of the direct-injection flushing device 5 is along the transverse arrangement direction of the heat transfer tube transverse rows 8, and the up-down direction is along the length direction of the heat transfer tubes 81. The size of the direct-injection flushing device 5 should be designed according to the distance between two adjacent heat transfer tube transverse rows 8, so that the direct-injection flushing device 5 can smoothly enter between two adjacent heat transfer tube transverse rows 8 without interference.

The working principle of the direct-injection flushing device 5 of the invention is as follows: the direct-injection flushing device 5 is firstly placed between two adjacent heat transfer tube transverse rows 8, the distance between the direct-injection flushing device and the two heat transfer tube transverse rows 8 is equal, the front-back direction of the direct-injection flushing device 5 is along the arrangement direction (transverse direction) of the heat transfer tube transverse rows 8, the up-down direction is along the length direction (vertical direction) of the heat transfer tubes 81, and then the left-right direction of the direct-injection flushing device is along the longitudinal direction and is fixed in a certain mode. Referring to fig. 6, the spray gun mechanisms on the left and right sides of the direct-injection flushing device 5 flush the heat transfer tubes 81 in the two heat transfer tube banks 8, respectively, and before flushing, the position of the direct-injection flushing device 5 is adjusted so that the direct spray gun 53a faces the left or right side of the heat transfer tube 81, as shown in fig. 6. When the water flushing cleaning is carried out, the water supply port of the base 51 is communicated with an external high-pressure water source through a water pipe, high-pressure water enters an internal water channel of the base 51, passes through the rotary port and the rotary joint, passes through the water channel in the rotary spray gun seat 53b, and finally is sprayed out of the straight spray gun 53a, and the left side and the right side of the heat transfer pipe 81 are flushed under high pressure. Meanwhile, in the water spraying process, the rotary spray gun base 53b is driven to rotate up and down through the swing driving mechanism, the rotary spray gun base 53b drives the straight spray gun 53a to swing up and down, the flushing range of the straight spray gun 53a is enlarged vertically, and therefore the flushing and cleaning range of the heat transfer pipe 81 can be effectively increased.

The direct-injection flushing device 5 can be placed between the heat transfer pipes 81 to directly and effectively flush the surfaces of the heat transfer pipes 81, particularly when the heat transfer pipes 81 are placed between the heat transfer pipes 81, the surfaces of the heat transfer pipes 81 which are not oriented to the direct-injection flushing device 5 can be flushed, the direct-injection spray gun 53a can swing up and down, the flushing range is large, and the use is flexible and convenient.

In the present invention, the range of the vertical swing angle of the straight spray gun 53a driven by the rotary spray gun base 53b is determined according to the actual situation, preferably the vertical swing angle of the straight spray gun 53a is within the range of 90 °, and the flushing range of the straight spray gun 53a can cover the local length of the heat transfer tube 81.

Referring to fig. 1 to 6, the direct-injection flushing device 5 of the present invention will be further described in one embodiment.

In this embodiment, referring to fig. 1, 2 and 6, two spray gun mechanisms are respectively installed on the left and right sides of the base, and keep the left and right symmetry, preferably, a plurality of straight spray guns 53a in the spray gun mechanisms are arranged along the front and rear direction, and the interval between the straight spray guns 53a is one or more times of the interval between the heat transfer tubes 81 in the heat transfer tube horizontal rows 8, so that a plurality of heat transfer tubes 81 can be washed simultaneously.

In this embodiment, referring to fig. 1, the water pipe connector of the base 51 is provided with a water pipe connector 52, and the water pipe connector 52 is preferably a quick connection connector, so as to be conveniently connected with a high-pressure water pipe.

In this embodiment, as a preferred design, referring to fig. 1, the direct-injection flushing device 5 further includes a detection mechanism including a sensing block (not shown in the drawing) fixed to the rotary spray gun holder 53b, and a proximity sensor 56a for detecting the position of the sensing block, the proximity sensor 56a being fixed to the base 51 by a sensor bracket, the sensing block 56c being rotated together with the rotary holder 53b, and the vertical swing angle range of the rotary spray gun holder 53b being detected by sensing the sensing block by the proximity sensor 56 a.

In this embodiment, referring to fig. 1, the swing driving mechanism includes a swing link block 54p, a lift driving assembly driving the swing link block 54p to move up and down, and a link assembly connecting the swing link block 54p and the rotary spray gun holder 53b, wherein the link assembly includes a swing link 54q having one end fixedly connected to the rotary spray gun holder 53b, and a swing link 54r having one end hinged to the swing link 54q through a hinge shaft 54s, and the other end of the swing link 54r is hinged to the swing link block 54p through a hinge shaft 54 s. The swing connection block 54p is driven to move up and down by the lifting driving component, the swing connection block 54p is driven to move up and down, and the rotary spray gun base 53b is driven to rotate up and down by the swing connection rod 54r and the swing rod 54 q. In the present embodiment, the rotary gun holders 53b of the two gun mechanisms are swung up and down in synchronization, and the recoil force of the direct-injection flushing device 5 at the time of spraying water is always symmetrical in the left-right direction.

In the present embodiment, the elevation driving assembly includes a pneumatic motor 54a, a driving shaft 54g, an intermediate transmission structure connecting the pneumatic motor 54a and the driving shaft 54g, and a cam transmission structure provided at one end of the driving shaft 54g, specifically, referring to fig. 1 and 2, the pneumatic motor 54a is fixed at the lower end of the base 51 through a motor connection plate 54b, and the driving shaft 54g is installed in a shaft support 54f fixed at the upper end of the base 51 to be freely rotatable. Referring to fig. 3 and 4, the cam transmission structure includes a cam eccentric plate 54k fixed to a driving shaft 54g, a cam bearing 54j fixed to the cam eccentric plate 54k, and a cam runner plate 54h having a bar-shaped runner 54i, the cam bearing 54j being located in the bar-shaped runner 54 i. Referring to fig. 1 and 2, the intermediate transmission structure includes a speed reducer 54c and a plurality of gears 54e, the speed reducer 54c is fixed at the lower end of the base 51 through a speed reducer support 54d and is in transmission connection with the air motor 54a, one gear 54e is installed on the speed reducer 54c as an output gear 54e, one 54e is fixed at the end of a driving shaft 54g as an input gear, a plurality of gears 54e are provided between the output gear and the output gear as intermediate transmission gears, the intermediate transmission gears are installed on a gear bearing block 54l, and a gear protection cover 54m is provided to protect the gears 54e.

In this embodiment, preferably, referring to fig. 1, the swing driving mechanism further includes a lift guide assembly including a lift guide bar 54n, and a lift guide plate 54o slidably mounted on the lift guide bar 54n up and down, the swing link block 54p being fixed on the lift guide plate 54o, the lift guide plate 54o being fixedly connected with the cam runner plate 54 h. The elevation guide plate 54o can make the up-and-down movement of the swing link block 54p smoother and more reliable. In addition, a top cover plate is provided on the elevation guide plate 54o for protecting the structure below the top cover plate.

The working process of the whole swing driving mechanism in the embodiment is as follows: the pneumatic motor 54a acts to drive the speed reducer 54c to rotate, an output gear on the speed reducer 54c drives an input gear on a driving shaft 54g to rotate through a plurality of intermediate gears, so as to drive the driving shaft 54g to rotate, the driving shaft 54g drives a cam eccentric plate 54k to eccentrically rotate, the cam eccentric plate 54k drives a cam bearing 54j to eccentrically rotate, the cam bearing 54j slides in a strip-shaped chute 54i during eccentric rotation and simultaneously drives a cam chute plate 54h to vertically move, the cam chute plate 54h drives a lifting guide plate 54o to vertically slide along a lifting guide rod 54n, the lifting guide plate 54o drives a swinging connecting block 54p to vertically move, and the swinging connecting block 54p drives a rotary spray gun seat 53b to vertically rotate through a swinging connecting rod 54r and a swinging rod 54q, so as to drive the straight spray gun 53a to vertically swing.

Of course, the swing drive mechanism in the direct-injection flushing device 5 is not limited to the specific configuration described above, and in other embodiments, other conventional reasonable designs may be adopted, and the above-described functions may be realized.

Referring to fig. 7, 8 and 18, the present invention further provides a flushing device in the secondary side of an evaporator of a nuclear power plant, for entering the secondary side 7 of the evaporator for flushing, wherein the secondary side 7 of the evaporator is provided with a plurality of heat transfer tube transverse rows 8 parallel to each other, the heat transfer tube transverse rows 8 comprise a plurality of heat transfer tubes 81 which are distributed at equal intervals along the transverse direction, the flushing device comprises a cableway device 1, a trolley device 2, a travelling device 3 and a control system, the cableway device 1 comprises two transverse cables 11 arranged in the secondary side 7 of the evaporator, the two cables 11 are positioned between the two adjacent heat transfer tube transverse rows 8, the trolley device 2 is movably arranged on the cables 11, and the travelling device 3 is fixedly arranged on the trolley device 2; the direct-injection flushing device 5 is arranged on the trolley device 2 and is fixedly connected with the traveling device 3, the front-back direction of the direct-injection flushing device 5 is along the extending direction of the cable 11, and the traveling device 3 drives the trolley device 2 and the direct-injection flushing device 5 to move back and forth on the cable 11; the control system is connected with the running gear 3 in a control way, and is also connected with the swing driving mechanism of the direct-injection flushing device 5 in a control way.

The flushing device according to the invention is installed in the secondary side 7 of the evaporator for cleaning purposes, see fig. 18, and can be fitted and adjusted on the evaporator analog body 4 before actual use, see fig. 17. Two cables 11 of the cableway device 1 are used as tracks for the trolley device 2 to walk, the trolley device 2 freely walks on the cables 11, and the walking device 3 is used for driving the trolley device 2 and the direct-injection flushing device 5 to move back and forth on the cables 11, so that the direct-injection flushing device 5 reaches different positions to perform flushing operation. The traveling motion of the traveling device 3 and the swinging motion of the direct-injection flushing device 5 can be remotely controlled in the control room by a control system, and no field operation of staff is required.

In this embodiment, referring to fig. 1, a first connection block 57 and a second connection block 58 are respectively fixed at two ends of the direct-injection flushing device 5, the first connection block 57 is fixedly connected with the running device 3 through a bolt, and the second connection block 58 is fixedly connected with the trolley device 2 through a bolt.

In the invention, the walking device 3 can adopt various existing proper equipment, and can drive the trolley device 2 and the inclined-jet direct-jet flushing device 5 to be arranged on the cable 11. As a preferred design, referring to fig. 13, 14, 15 to 16, in the present embodiment, the running gear 3 includes a step driving mechanism 31, and a clamping and supporting mechanism 32 disposed on both upper and lower sides of the step driving mechanism 31, the clamping and supporting mechanism 32 includes a base plate 32a, two supporting corrugated blocks 32e symmetrically disposed on the base plate 32a on the left and right sides, and a clamping and driving assembly mounted on the base plate 32a, the supporting corrugated blocks 32e are provided with a limit groove 32f for pressing on the heat transfer tube 81, the clamping and driving assembly drives the two supporting corrugated blocks 32e to move linearly on the left and right sides, the two supporting corrugated blocks 32e are made to approach or separate from each other, and the clamping and driving assembly can stabilize the positions of the two supporting corrugated blocks 32e, and the clamping and driving assembly is connected with the control system; the step driving mechanism 31 drives the two clamping support mechanisms 32 to move back and forth relatively, and the clamping step driving mechanism 31 is connected with the control system.

In the present embodiment, referring to fig. 14 and 15, as a preferred design, the step driving mechanism 31 of the running gear 3 includes a step driving cylinder 31b, the step driving cylinder 31b is connected to the control system, and the cylinder body and the piston rod of the step driving cylinder 31b are respectively fixed to the base plates 32a of the two holding and supporting mechanisms 32. And further, the step driving mechanism 31 further comprises a step slider 31a and a step slider 31c, the step slider 31c is arranged in the front-rear direction, the front-rear ends of the step slider 31c are fixed on the base plate 32a through a slider fixing seat 31d, and a position for supporting a slider clamping plate 31f to fix the slider fixing seat 31d is provided, the step slider 31a is slidably mounted on the step slider 31c, and the step slider 31a is fixedly connected with a piston rod of the step driving cylinder 31b through a Y-shaped connecting rod 31E. Specifically, in the present embodiment, the cylinder body of the stepping driving cylinder 31b is fixed to the base plate 32a of the lower stepping driving mechanism 31, and the stepping slider 31a is fixedly connected to the base plate 32a of the upper stepping driving mechanism 31, but the reverse is also possible. Thus, by the telescopic movement of the step driving cylinder 31b, the relative movement between the step slider 31a and the cylinder body of the step driving cylinder 31b can drive the relative movement of the clamping and supporting mechanisms 32 on the upper and lower sides, thereby realizing the step movement. Of course, in other embodiments, the stepping driving mechanism 31 may be arranged in other conventional ways, and the driving of the two clamping and supporting mechanisms 32 to move back and forth may be realized.

In this embodiment, referring to fig. 14 and 16, as a preferred design, in the walking device 3, the clamping driving assembly in the clamping supporting mechanism 32 includes a clamping driving slider 32i, a clamping driving link 32j, and a clamping driving cylinder 32g fixed on the base plate 32a, the clamping driving cylinder 32g is connected with the control system, the clamping driving slider 32i is connected with a clamping driving piston rod 32h of the clamping driving cylinder 32g through a Y-shaped connecting block 32k, the clamping driving cylinder 32g drives the clamping driving slider 32i to move back and forth, left and right sides of the clamping driving slider 32i are respectively connected with two supporting ripple blocks 32e through the clamping driving link 32j, in particular, the supporting ripple block 32e is fixed on a ripple block fixing seat 32d, one end of the clamping driving link 32j is hinged with the ripple block fixing seat 32d through a hinge shaft 32r, and the other end is hinged with the clamping driving slider 32i through a hinge shaft 32 r. The clamping driving assembly further comprises a left and right guide structure for guiding the clamping driving sliding block 32i to move linearly left and right, specifically, the left and right guide structure comprises a left and right guide seat 32n fixed on the base plate 32a and a left and right guide rod 32m slidably installed in the left and right guide seat 32n, the left and right guide rod 32m is fixed on the corrugated block fixing seat 32d, and preferably, the left and right guide rod 32m adopts an optical axis, and a linear bearing 32l is arranged in the left and right guide seat 32n to be in sliding fit with the left and right guide rod 32 m. Accordingly, the clamping driving cylinder 32g moves to stretch and retract, the clamping driving piston rod 32h drives the clamping driving sliding block 32i to move back and forth, and the clamping driving sliding block 32i drives the corrugated block fixing seat 32d and the supporting corrugated block 32e to move smoothly and linearly left and right under the constraint of the left and right guiding structure through the clamping driving connecting rod 32 j.

In this embodiment, referring to fig. 16, it is preferable that the grip driving assembly further includes a front-rear guide structure for guiding the grip driving slider 32i to move forward and backward, specifically, the front-rear guide structure includes a front-rear guide bar 32q fixedly installed on the base plate 32a, both ends of the front-rear guide bar 32q are fixed on the base plate 32a through front-rear fixing seats 32o, and a front-rear bar clamping plate 32p is provided to fix the position of the front-rear fixing seats 32o, and the grip driving slider 32i is installed on the left-right guide bar 32 m. By providing the front-rear guide structure, the clamping driving slide block 32i can move forward and backward more stably and reliably.

The basic working principle of the running gear 3 in this embodiment is: the size of the limit groove 32f is determined according to the size of the heat pipe 81. Referring to fig. 13, 14, 15, 16 and 19, the running gear 3 is placed between two adjacent heat transfer tube rows 8, wherein the clamping support mechanism 32 has two states of opening, clamping and closing and loosening, specifically, the clamping drive assembly drives the two support corrugated blocks 32e to move linearly left and right, so that the two support corrugated blocks 32e are separated from each other, and the limit grooves 32f on the two support corrugated blocks 32e are respectively pressed on the heat transfer tubes 81 of the heat transfer tube rows 8 on the left side and the right side of the clamping support mechanism 32 and kept stable, so that the clamping support mechanism 32 is firmly clamped on the two heat transfer tube rows 8 on the left side and the right side, and the limit grooves 32f simultaneously limit the clamping support mechanism 32 from moving forwards and backwards, and at the moment, the clamping support mechanism 32 is in an opening and clamping state; the clamping driving assembly drives the two supporting corrugated blocks 32e to move linearly left and right, so that the two supporting corrugated blocks 32e are close to each other, the limiting grooves 32f on the two supporting corrugated blocks 32e are separated from the heat transfer tube 81, the heat transfer tube 81 does not limit the clamping supporting mechanism 32 to move forwards and backwards, and the clamping supporting mechanism 32 is in a closed and released state. The walking device 3 has two functions, one is used for fixing, the other is used for driving the trolley device 2 to move back and forth on the cable 11, when the two clamping and supporting mechanisms 32 are in an open clamping state, the walking device 3 is fastened on the two heat transfer tube transverse rows 8, and the working process of the walking device 3 in a back-and-forth stepping motion is as follows: the control system controls one of the clamping support mechanisms 32 to act, for example, the lower clamping support mechanism 32 acts and is changed into a closed and released state, the upper clamping support mechanism 32 still is in an open and clamped state, then the stepping driving mechanism 31 is controlled to drive the two clamping support mechanisms 32 to move back and forth for a distance, at the moment, the upper clamping support mechanism 32 is limited to move back and forth for a distance to the front end because the lower clamping support mechanism 32 is limited to move back and forth, and after the next position is reached, the upper clamping support mechanism 32 is controlled to be in an open and clamped state and clamped between the two heat transfer tube transverse rows 8, and the upper clamping support mechanism 32 completes one stepping movement; then the lower clamping and supporting mechanism 32 is changed from an open clamping state to a closed and unclamped state, and similarly, the stepping driving mechanism 31 acts to drive the lower clamping and supporting mechanism 32 forward for a certain distance, and then the lower clamping and supporting mechanism 32 is changed into an open clamping state after reaching a specified position and clamped between the two heat transfer tube transverse rows 8, and the lower clamping and supporting mechanism 32 completes one-step movement. In this way, the gripping support mechanisms 32 on the upper and lower sides sequentially move forward in a stepwise manner in the above manner, so that the travelling device 3 can move forward, and similarly can also move backward in a stepwise manner, so that the travelling device can be used to drive the trolley device 2 to move forward and backward on the cable 11.

In this embodiment, referring to fig. 14, in the clamping and supporting mechanism 32, a baffle 32b is further provided on the front and rear sides of the base plate 32a, and a cover plate 32c is provided opposite to the base plate 32a from top to bottom, and an installation space for clamping the driving assembly, the front and rear guiding structure, the left and right guiding structure, etc. is formed between the base plate 32a, the cover plate 32c, and the two baffle plates 32b, so that the base plate 32a, the cover plate 32c, and the two baffle plates 32b play a role of protection. In addition, a trolley connecting block 33 for connecting with the trolley device 2 is fixedly arranged at the rear end of the upper clamping and supporting mechanism 32, and a flushing connecting block 34 for connecting with the direct-injection flushing device 5 is fixedly arranged at the front end of the lower clamping and supporting mechanism 32, so that connection and fixation are facilitated.

Of course, the clamping and supporting mechanism 32 of the running device 3 is not limited to the above-mentioned structure, and in other embodiments, the stepping driving mechanism 31 may be arranged in other reasonable ways, so as to realize the above-mentioned driving function

In this embodiment, see fig. 17, as a preferred design, in the cableway device 1, the two ends of the cable 11 are respectively connected to hand holes on two opposite sides of the secondary side 7 of the evaporator, so that the direct-injection flushing device 5 can be pushed in from the hand holes. The cableway device 1 further comprises a fixing component and a tensioning component which are respectively and fixedly connected to two sides of the outer wall of the secondary side 7 of the evaporator, one end of the cable 11 is fixed in the fixing component, the other end of the cable 11 is installed in the tensioning component, and the tensioning component can pull the cable 11 to tension, wherein the cable 11 can be a steel wire rope.

Referring to fig. 9, in this embodiment, the fixing assembly includes a supporting frame composed of a supporting end plate 14, a supporting flange 13 and a supporting rod 15, the supporting end plate 14 and the supporting flange 13 are respectively fixed at two ends of the supporting rod 15, two ends of the supporting rod 15 are connected with threaded joints 15a to facilitate connection with the supporting end plate 14 and the supporting flange 13, the supporting flange 13 is connected with a hand hole flange surface 6 on the outer wall of the secondary side 7 of the evaporator through a plurality of nylon bolts 16, and the nylon bolts 16 avoid damage to the hand holes of the secondary side 7 of the evaporator on one hand, and increase the reliability of fixing the fixing assembly on the other hand. Further, the fixing assembly comprises a cable pad plate 12 fixed on a supporting end plate 14, the cable pad plate 12 is a semicircular plate, the peripheral surface of the cable pad plate is concave to form a semi-annular installation groove, one ends of two cables 11 are connected into a whole and are embedded in the installation groove of the cable pad plate 12, so that the two cables 11 can be obtained by steering the whole cable pad plate 12, and two cables 11 which are parallel to each other are formed in the secondary side 7 of the evaporator.

Referring to fig. 10, in this embodiment, the tensioning assembly also includes a supporting frame composed of a supporting end plate 14, a supporting flange 13 and a supporting rod 15, wherein the supporting end plate 14 and the supporting flange 13 are respectively fixed at two ends of the supporting rod 15, and the supporting flange 13 is connected with a hand hole flange surface 6 on the outer wall of the secondary side 7 of the evaporator through a plurality of nylon bolts 16, and the structure and principle of the supporting frame are basically the same as those of the supporting frame in the fixing assembly. The tensioning assembly further comprises a clamping structure in which one end of the cable 11 is clamped, and an adjustment structure driving the clamping structure towards or away from the evaporator secondary side 7. Specifically, the clamping structure includes a fixing plate 17, and a clamping plate 18 pressed against the fixing plate 17, and one ends of the two cables 11 are clamped in the fixing plate 17 and the clamping plate 18. The adjusting structure comprises a threaded ejector rod 19 and a bolt screwed on the threaded ejector rod 19, one end of the threaded ejector rod 19 is fixed on the supporting end plate 14, the other end of the threaded ejector rod is smoothly inserted into the fixed plate 17, two nuts on the threaded ejector rod 19 are located on the inner side of the fixed plate 17 towards the secondary side 7 of the evaporator, the nuts are propped against the inner side of the fixed plate 17 through outward rotation, and the structure is clamped outwards, so that the cable 11 is tensioned.

Referring to fig. 8 and 12, in the present embodiment, the cart device 2 includes two cart assemblies disposed opposite one another, one of which is fixedly connected to the running gear 3, and the other of which is fixedly connected to the direct-injection flushing device 5. Referring to fig. 12, the trolley assembly comprises a trolley body and roller structures arranged on the left side and the right side of the trolley body, the two roller structures are respectively installed to be matched with the two cables 11, the roller structures comprise transverse rollers 24 erected on the upper sides of the cables 11 and vertical rollers 23 propped against the left side or the right rear side of the cables 11, spacing spaces for the cables 11 to pass through are formed among the transverse rollers 24, the vertical rollers 23 and the trolley body, the cables 11 cannot be separated from the spacing spaces after the trolley assembly is installed, the trolley assembly is prevented from being separated from the cables 11, friction force between the transverse rollers 24 and the vertical rollers 23 and the cables 11 is effectively reduced, walking is facilitated, and the walking is stable and reliable. Wherein, the horizontal roller 24 and the vertical roller 23 are both bearing rollers, and the vehicle body comprises a lower saddle 21 and two upper saddles 22 respectively arranged at the left side and the right side of the lower saddle 21. The upper saddle 22 is arranged at the upper end of the lower saddle 21 through bolts, the vertical idler wheels 23 are arranged on the lower saddle 21, the transverse idler wheels 24 are arranged on the upper saddle 22, and the trolley components are convenient to install on the two cables 11 through the disassembly and assembly of the upper saddle 22. Preferably, a conical locating pin 25 is mounted on one trolley assembly, or on both trolley assemblies, for quick locating mounting with the running gear 3 or the direct-injection flushing device 5.

As a preferred design, the flushing device also comprises a sensor for detecting the supporting compaction degree of the clamping and supporting mechanism 32 and a sensor for detecting the stepping distance of the running gear 3 each time.

Referring to fig. 17 and 18, the working procedure of the flushing device in the embodiment of the present invention is: (1) The fixing component and the tensioning component of the cableway device 1 are respectively arranged and fixed on the flange surfaces 6 of hand holes at two sides of the secondary side 7 of the evaporator, and the cable 11 is arranged and tensioned; (2) The trolley device 2, the travelling device 3 and the direct-injection flushing device 5 are installed according to requirements, a worker pushes the direct-injection flushing device 5 into a hand hole on the secondary side 7 of the evaporator, the space between the heat transfer tubes 81 in the heat transfer tube transverse rows 8 is positioned through a positioning ruler, a control room is informed to control the travelling device 3 to be fixedly pressed between the two heat transfer tube transverse rows 8, and the direct-injection flushing device 5 sprays water to perform flushing operation; (3) After the cleaning of one position is completed, the walking device 3 acts to drive the direct-injection flushing device 5 to move to the next working position step by step, then the direct-injection flushing device is fixed, and the flushing work is started again; (4) The circulation is carried out until the cleaning work of all positions of the two heat transfer tube transverse rows 8 is completed; (5) According to the above-described procedures (1) to (4), the flushing device is caused to perform flushing work between any adjacent heat transfer tube rows 8, thereby completing the overall cleaning work of the heat transfer tubes 81 and tube sheets in the evaporator secondary side 7. The supporting and compacting degree of the clamping and supporting mechanism 32 and the distance of each stepping position are fed back to the control system through sensors, so that the accuracy and reliability of the flushing operation of the equipment are ensured.

According to the flushing device disclosed by the invention, after the cleaning work, the cleanliness of the heat transfer tube 81 and the tube plate in the secondary side 7 of the evaporator is checked through a camera installed in the flushing device, and residual sludge on the heat transfer tube 81 and the tube plate in the secondary side 7 of the S-shaped evaporator after flushing meets the following criteria: the mud residue without flaking is accumulated, and the juncture between 80% of the heat transfer tubes and the tube plate should be clearly visible; the tubesheet matrix metal should be clearly visible for 80% of the tubesheet area.

As can be seen from the above, the flushing device in this embodiment, through the cableway device 1, the trolley device 2, the travelling device 3, and the control system, can enable the direct-injection flushing device 5 to enter the steam generation secondary side to flush the heat transfer tube 81, the tube plate and the like, ensure the stability and reliability of the direct-injection flushing device 5 when spraying water by using the travelling device 3, and realize the stepping motion of the direct-injection flushing device 5 in the evaporator secondary side 7 by means of the heat transfer tube 81, flush different positions, and have stable and reliable operation, so as to avoid the risk that the flushing device cannot be taken out in the evaporator secondary side 7.

In summary, the invention effectively overcomes the defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. The utility model provides a direct injection bath device in nuclear power station evaporator secondary side, have a plurality of heat transfer pipe horizontal rows (8) that are parallel to each other in the evaporator secondary side (7), heat transfer pipe horizontal rows (8) include many heat transfer pipe (81) of arranging along horizontal equidistance, its characterized in that: the direct-injection flushing device (5) comprises a base (51), a spray gun mechanism and a swing driving mechanism, wherein the spray gun mechanism is arranged on the left side and the right side of the base (51), a water pipe connector, a rotary connector and an internal water channel which is communicated with the water pipe connector and the rotary connector are arranged in the base (51), the spray gun mechanism comprises two rotary spray gun seats (53 b) with waterways inside, a plurality of direct spray guns (53 a) fixedly connected to the rotary spray gun seats (53 b) and rotary connectors, the direct spray guns (53 a) are communicated with the waterways inside the rotary spray gun seats (53 b), the rotary spray gun seats (53 b) are connected to the rotary connectors through the rotary connectors, the rotary spray gun seats (53 b) can vertically rotate around the rotary connectors, and the spraying directions of the direct spray guns (53 a) are perpendicular to the front-rear directions; the swing driving mechanism is connected with the rotary spray gun seat (53 b) and drives the rotary spray gun seat (53 b) to rotate up and down; the direct-injection flushing device (5) is used for being placed between two adjacent heat transfer tube transverse rows (8), and the front-back direction of the direct-injection flushing device (5) is along the transverse arrangement direction of the heat transfer tube transverse rows (8), and the up-down direction is along the length direction of the heat transfer tubes (81).

2. The direct-injection flush device of claim 1, wherein: the plurality of straight spray guns (53 a) in the spray gun mechanism are arranged along the front-back direction, and the spacing of the straight spray guns (53 a) is one or more times of the spacing of the heat transfer tubes (81) in the transverse rows (8) of the heat transfer tubes.

3. The direct-injection flush device of claim 1, wherein: the device also comprises a detection mechanism, wherein the detection mechanism comprises a sensing block fixed with the rotary spray gun seat (53 b) and a proximity sensor (56 a) for detecting the position of the sensing block.

4. The direct-injection flush device of claim 1, wherein: the swing driving mechanism comprises a swing connecting block (54 p), a lifting driving assembly for driving the swing connecting block (54 p) to move up and down and a connecting rod assembly for connecting the swing connecting block (54 p) and the rotary spray gun seat (53 b), wherein the connecting rod assembly comprises a swing rod (54 q) with one end fixedly connected with the rotary spray gun seat (53 b) and a swing connecting rod (54 r) with one end hinged with the swing rod (54 q), and the other end of the swing connecting rod (54 r) is hinged with the swing connecting block (54 p).

5. The direct-injection flush device of claim 4, wherein: the swing driving mechanism further comprises a lifting guide assembly, the lifting guide assembly comprises a lifting guide rod (54 n) and a lifting guide plate (54 o) which is installed on the lifting guide rod (54 n) in a vertical sliding mode, and the swing connecting block (54 p) is fixed on the lifting guide plate (54 o).

6. The direct-injection flush device of claim 4, wherein: the lifting drive assembly comprises a pneumatic motor (54 a), a driving shaft (54 g), an intermediate transmission structure for connecting the pneumatic motor (54 a) and the driving shaft (54 g) and a cam transmission structure arranged at one end of the driving shaft (54 g), wherein the cam transmission structure comprises a cam eccentric plate (54 k) fixed on the driving shaft (54 g), a cam bearing (54 j) fixed on the cam eccentric plate (54 k) and a cam sliding groove plate (54 h) with a strip-shaped sliding groove (54 i), and the cam bearing (54 j) is positioned in the strip-shaped sliding groove (54 i).

7. Flushing equipment in the nuclear power station evaporator secondary side for wash in entering into evaporator secondary side (7), have a plurality of heat transfer tube horizontal rows (8) that are parallel to each other in the evaporator secondary side (7), heat transfer tube horizontal row (8) include many heat transfer tubes (81) of arranging along horizontal equidistance, its characterized in that: the flushing equipment comprises a cableway device (1), a trolley device (2), a travelling device (3) and a control system, wherein the cableway device (1) comprises two transverse cables (11) arranged in the secondary side (7) of the evaporator, the two cables (11) are positioned between two adjacent transverse rows (8) of heat transfer tubes, the trolley device (2) is movably arranged on the cables (11), and the travelling device (3) is fixedly arranged on the trolley device (2); the device also comprises a direct-injection flushing device (5) as claimed in any one of claims 1 to 6, wherein the direct-injection flushing device (5) is arranged on the trolley device (2) and is fixedly connected with the travelling device (3), the front-back direction of the direct-injection flushing device (5) is along the extending direction of the cable (11), and the travelling device (3) drives the trolley device (2) and the direct-injection flushing device (5) to move back and forth on the cable (11); the control system is in control connection with the walking device (3), and is also in control connection with the swing driving mechanism of the direct-injection flushing device (5).

8. The irrigation apparatus of claim 7, wherein: the cableway device (1) further comprises a fixing component and a tensioning component which are respectively and fixedly connected to two sides of the outer wall of the secondary side (7) of the evaporator, one end of the cable (11) is fixed in the fixing component, the other end of the cable is installed in the tensioning component, and the tensioning component can pull the cable (11) to tension.

9. The irrigation apparatus of claim 8, wherein: the fixing assembly comprises a cable backing plate (12), wherein the cable backing plate (12) is provided with a semi-annular mounting groove, and one ends of two cables (11) are connected into a whole and are embedded in the mounting groove of the cable backing plate (12); the tensioning assembly comprises a clamping structure in which one end of the cable (11) is clamped, and an adjustment structure driving the clamping structure towards or away from the evaporator secondary side (7).

10. The irrigation apparatus of claim 7, wherein: the trolley device (2) comprises two trolley components which are oppositely arranged front and back, the trolley components comprise a trolley body and roller structures arranged on the left side and the right side of the trolley body, the two roller structures are respectively matched with two cables (11), each roller structure comprises a transverse roller (24) arranged on the upper side of each cable (11) in a supporting mode and a vertical roller (23) propped against the left side or the right side of each cable (11), and a limiting space used for the cables (11) to pass through is reserved among the transverse roller (24), the vertical roller (23) and the trolley body.