CN114199072A - 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 a 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 swing 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 bases, a plurality of straight spray guns and rotary joints, the rotary spray guns are fixedly connected onto the rotary spray gun bases, the straight spray guns are internally provided with water channels, the straight spray guns are communicated with the water channels in the rotary spray gun bases, the rotary spray gun bases are connected onto the rotary interfaces through the rotary joints, the water channels in the rotary spray gun bases are communicated with the rotary interfaces through the rotary joints, the rotary spray gun bases can rotate up and down around the rotary joints, and the injection direction of the straight spray guns is perpendicular to the front-back direction; the swing driving mechanism is connected with the rotary spray gun base and drives the rotary spray gun base 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, because the water at 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 which are combined with each other to form alkali or salt 02 with low solubility, so that dirt or sludge is formed, and the dirt or sludge is deposited on the surface of a heat transfer pipe, a pipe plate and a support plate in the secondary side of the evaporator and can be filled in holes of the heat transfer pipe and the support plate. The sludge in the secondary side of the evaporator can reduce the thermal conductivity of the heat transfer pipe, cause corrosion of the heat transfer pipe and even leakage, particularly easily generate stress corrosion cracks, pitting corrosion and thinning at the gap between the heat transfer pipe and the support plate, and possibly cause unstable water level of the secondary side and reduced steam pressure. Therefore, during each overhaul of the nuclear power plant, the sludge in the secondary side of the evaporator is removed. The existing removing method comprises chemical cleaning, bubbling cleaning, upper pipe bundle spraying cleaning, high-pressure water jet pipe plate washing and the like. After theoretical calculation and long-term practical inspection, about 30% -40% of sludge is found to be deposited on the heat transfer pipe plate and the pipe plate on the secondary side of the evaporator, so that the high-pressure water jet pipe plate cleaning technology is widely used in various large nuclear power plants at present and has the following defects: on one hand, because the secondary side of the evaporator is polluted greatly, the space between the heat transfer pipes is small, and workers can not enter the evaporator during cleaning, the cleaning operation can be performed from the outside generally and is unchanged; on the other hand, the heat transfer pipe has a certain length, the high-pressure water spraying direction is fixed in the existing washing method, the washing range in the length direction of the heat transfer pipe is limited, and the complete washing is difficult to complete.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by 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 plant, which can be put between heat transfer pipes to directly and effectively flush the heat transfer pipes, and the spray gun can swing up and down, and has a large flushing range and flexible and convenient use.

In order to achieve the above object, the present invention provides a direct injection water flushing device in a secondary side of an evaporator of a nuclear power plant, wherein a plurality of heat transfer pipe transverse rows parallel to each other are arranged in the secondary side of the evaporator, each heat transfer pipe transverse row comprises a plurality of heat transfer pipes arranged at equal intervals in the transverse direction, the direct injection water flushing device comprises a base, a spray gun mechanism and a swing driving mechanism, spray gun mechanisms are arranged on both the left side and the right side of the base, a water pipe interface, a rotary interface and an internal water channel for communicating the water pipe interface and the rotary interface are arranged in the base, the spray gun mechanism comprises two rotary spray gun seats with water channels inside, a plurality of straight spray guns fixedly connected to the rotary spray gun seats and a rotary joint, the straight spray guns are communicated with the internal water channel of the rotary spray gun seats, the rotary spray gun seats are connected to the rotary interface through the rotary joint, and the internal water channel of the rotary spray gun seats is communicated with the rotary interface through the rotary joint, the rotary spray gun base can rotate up and down around the rotary joint, and the spraying direction of the straight spray gun is perpendicular to the front-back direction; 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 transverse rows of heat transfer pipes, and the front and back directions of the direct-injection flushing device are along the transverse arrangement direction of the transverse rows of heat transfer pipes and the length direction of the heat transfer pipes along the up and down directions.

Further, a plurality of direct injection guns in the spray gun mechanism are arranged along the front-back direction, and the distance between the direct injection guns is one time or multiple times of the distance between the heat transfer pipes in the heat transfer pipe transverse row.

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

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

Further, swing actuating mechanism still includes lift direction subassembly, lift direction subassembly includes lift guide bar and installs the lift deflector on lift guide bar with sliding from top to bottom, the swing connecting block is fixed on the lift deflector.

Further, the lifting driving assembly comprises a pneumatic motor, a driving shaft, an intermediate transmission structure 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 sliding groove plate with a strip-shaped sliding groove, and the cam bearing is positioned in the strip-shaped sliding groove.

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 be flushed, wherein a plurality of heat transfer pipe transverse rows which are parallel to each other are arranged in the secondary side of the evaporator, each heat transfer pipe transverse row comprises a plurality of heat transfer pipes which are arranged at equal intervals along the transverse direction, each flushing equipment comprises a cableway device, a trolley device, a walking device and a control system, each cableway device comprises two transverse cables which are arranged in the secondary side of the evaporator, the two cables are positioned between every two adjacent heat transfer pipe transverse rows, the trolley device is movably arranged on the cables, and the walking device is fixedly arranged on the trolley device; the trolley device is characterized by further comprising the direct-injection flushing device, the direct-injection flushing device is mounted on the trolley device and 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 connected with the walking device in a control mode and is also connected with a swing driving mechanism of the direct-injection flushing device in a control mode.

Furthermore, the cableway device also comprises a fixing component and a tensioning component which are fixedly connected to two sides of the outer wall of the steam generator respectively, 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.

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

Furthermore, the trolley device comprises two trolley components which are oppositely arranged in the front and back direction, each trolley component comprises a trolley body and roller structures which are arranged on the left side and the right side of the trolley body, the two roller structures are respectively matched with the two cables, each roller structure comprises a transverse roller which is erected on the upper side of the corresponding cable and a vertical roller which is abutted to the left side or the right side of the corresponding cable, and a limiting space for the cables to pass through is arranged among the transverse rollers, the vertical rollers and the trolley body.

As described above, the direct injection flush device and the flush apparatus according to the present invention have the following advantageous effects:

through setting up base, spray gun mechanism and swing actuating mechanism, directly spout bath device, during the use, directly spout bath device earlier and lay between two adjacent heat-transfer pipe horizontal rows, fix through certain mode. The spray gun mechanism of the left and right sides of the direct-injection flushing device respectively washes heat transfer pipes in two heat transfer pipe transverse rows, the direct-injection gun aims at the left side or the right side of the heat transfer pipes, high-pressure water enters an internal water channel of the base from a water pipe interface, and is sprayed out from the direct-injection gun through a rotary interface and a rotary joint and a water channel in a rotary spray gun seat to carry out high-pressure washing on the front side and the rear side of the heat transfer pipes. Meanwhile, in the water spraying process, the rotary spray gun seat is driven to rotate up and down through the swing driving mechanism, the rotary spray gun seat drives the straight spray gun to swing up and down, the flushing range of the straight spray gun is enlarged vertically, and therefore the flushing cleaning range of the heat transfer pipe can be effectively enlarged. Flushing device can enter into between the heat-transfer pipe in the evaporimeter secondary side, makes directly spout bath device at different positions department, directly washes the heat-transfer pipe surface effectively, when the heat-transfer pipe is between in particular, can directly spout bath device's front and back side to the heat-transfer pipe non-orientation and wash to the spray gun can the luffing motion, and it is big to wash the scope, and it is nimble convenient to use. .

Drawings

Fig. 1 is a schematic diagram of a direct injection flush device of the present invention.

Fig. 2 is a schematic view of a portion of the swing drive mechanism of the direct-injection flush device of the present invention.

Fig. 3 is a partial structural schematic diagram of a cam gear structure in the direct-injection flushing device of the present invention.

Fig. 4 is a partial structural schematic diagram of a cam gear 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 water device of the present invention.

Fig. 6 is a schematic diagram of the operation of the direct injection flush device of the present invention.

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

Fig. 8 is a partial structural view of a washing water apparatus in 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 tension assembly of the cableway device according to the present invention.

Fig. 11 is a schematic view showing the structure of a support bar in the cableway device according to the present invention.

FIG. 12 is a schematic view of the construction of the cart device of the present invention.

Fig. 13 is a schematic structural view of the traveling device of the present invention.

Fig. 14 is an exploded view of the structure of the traveling device according to the present invention.

Fig. 15 is a schematic structural view of a step driving mechanism of the traveling apparatus according to the present invention.

Fig. 16 is a schematic structural view of a gripping and supporting mechanism of the traveling apparatus according to the present invention.

Figure 17 installation schematic of the flushing device of the present invention.

Figure 18 is a schematic view of the operation of the flushing device according to the invention.

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

Description of the element reference numerals

1 cableway device

11 Cable

12 Cable tie plate

13 support flange

14 support end plate

15 support rod

15a screw joint

16 nylon bolt

17 fixed plate

18 clamping plate

19 screw ejector rod

2 trolley device

21 lower seat

22 seat for getting on bus

23 vertical roller

24 transverse roller

25 conical positioning pin

3 running gear

31 step driving mechanism

31a step slide

31b step driving cylinder

31c stepping slide bar

31d slide bar fixing seat

31e Y type connecting rod

31f support slide bar clamping plate

32 centre gripping supporting mechanism

32a substrate

32b baffle plate

32c cover plate

32d corrugated block fixing seat

32e supporting corrugated block

32f limiting groove

32g clamping driving cylinder

32h clamping drive piston rod

32i clamping driving slide block

32j clamp drive link

32k Y connecting block

32l linear bearing

Guide rod about 32m

32n left and right guide seats

32o front and back fixing seat

32p front and rear rod clamp plate

32q front and rear guide bar

32r hinge shaft

33 trolley connecting block

34 flushing connecting block

4 evaporator simulator

5 direct-injection flushing device

51 base

52 water pipe joint

53a direct injection gun

53b rotary spray gun seat

54a pneumatic motor

54b motor connecting plate

54c speed reducer

54d speed reducer support

54e gear

54f axle support

54g drive shaft

54h cam chute plate

54i strip chute

54j cam bearing

54k cam eccentric plate

54l gear bearing seat

54m gear shield

54n lifting guide rod

54o lifting guide plate

54p swing connecting block

54q pendulum rod

54r swinging connecting rod

54s articulated shaft

56a proximity sensor

56b sensor holder

57 first connecting block

58 second connecting block

6 hand hole flange face

7 secondary side of evaporator

8 transverse row of heat transfer tubes

81 Heat transfer tube

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.

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

Referring to fig. 1 to 6, the direct injection flushing device 5 of the present invention includes a base 51, a spray gun mechanism, and a swing driving mechanism, the spray gun mechanism is disposed on both left and right sides of the base 51, the base 51 is provided with a water pipe port (not shown in the drawings), a rotary port (not shown in the drawings), and an internal water passage (not shown in the drawings) communicating the water pipe port and the rotary port, the spray gun mechanism includes two rotary spray gun bases 53b having a water passage therein, a plurality of straight spray guns 53a fixedly connected to the rotary spray gun bases 53b, and rotary joints (not shown in the drawings), the direct spray guns 53a communicate with the internal water passage of the rotary spray gun bases 53b, the rotary spray gun bases 53b are connected to the rotary ports through the rotary joints, and the water passage inside the rotary spray gun bases 53b communicates with the rotary ports through the rotary joints, the rotary spray gun bases 53b can rotate up and down around the rotary joints, the injection direction of the straight injection gun 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 disposed between two adjacent transverse rows 8 of heat transfer tubes, and the front-rear direction of the direct-injection flushing device 5 is along the longitudinal direction of the heat transfer tubes 81 along the transverse arrangement direction of the transverse rows 8 and the up-down direction. The size of the direct flushing device 5 should be designed according to the distance between two adjacent transverse rows 8 of heat transfer tubes, so that the direct flushing device 5 can smoothly enter between two adjacent transverse rows 8 of heat transfer tubes without interference.

The working principle of the direct injection flushing device 5 of the present invention is: lay directly the bath device 5 of spouting earlier between two adjacent heat-transfer pipe horizontal rows 8, equal with two heat-transfer pipe horizontal rows 8 intervals to make the fore-and-aft direction of directly spouting bath device 5 along the direction of arranging of heat-transfer pipe horizontal row 8 (transversely promptly), the length direction (vertical promptly) of heat-transfer pipe 81 is followed to the upper and lower direction, then spout the left and right directions of bath device along vertically, fix through certain mode. Referring to fig. 6, the lance mechanisms on the left and right sides of the direct flush device 5 flush the heat transfer tubes 81 in the two heat transfer tube rows 8, respectively, and before flushing, the position of the direct flush device 5 is adjusted so that the straight lances 53a face the left or right sides of the heat transfer tubes 81, as shown in fig. 6. When washing by water, base 51 water supply pipe interface leads to pipe and outside high pressure water source intercommunication, and the inside water course that the water under high pressure got into base 51 is through rotary joint and rotary joint, through the water route in the rotatory spray gun seat 53b, and the spraying is gone out in the spray gun 53a at last from directly spouting, carries out high pressure washing to the left side and the right side of heat transfer pipe 81. Meanwhile, in the water spraying process, the rotary spray gun seat 53b is driven to rotate up and down through the swing driving mechanism, the rotary spray gun seat 53b drives the straight spray gun 53a to swing up and down, the washing range of the straight spray gun 53a is expanded in the vertical direction, and therefore the washing and cleaning range of the heat transfer pipe 81 can be effectively enlarged.

The direct injection water device 5 of the present invention can be inserted between the heat transfer pipes 81 to directly and efficiently flush the surface of the heat transfer pipes 81, and particularly, when the water is between the heat transfer pipes 81, the surface of the heat transfer pipes 81 not facing the direct injection water device 5 can be flushed, and the direct injection lance 53a can swing up and down, and has a wide flushing range and flexible and convenient use.

In the present invention, the range of the vertical swing angle of the straight lance 53a by the rotating lance base 53b is determined according to actual conditions, and preferably, the straight lance 53a swings vertically within a range of 90 °, and the flushing range of the straight lance 53a can cover the partial length of the heat transfer pipe 81.

Referring to fig. 1-6, a direct injection flush device 5 of the present invention is further described in an embodiment.

In the present embodiment, referring to fig. 1, 2 and 6, two lance mechanisms are respectively installed on the left and right sides of the base to maintain the left-right symmetry, and preferably, a plurality of straight lances 53a in the lance mechanisms are arranged in the front-rear direction, and the distance between the straight lances 53a is one or more times the distance between the heat transfer pipes 81 in the transverse row 8 of heat transfer pipes, so that a plurality of heat transfer pipes 81 can be flushed at the same time.

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 connector to facilitate connection with a high pressure water pipe.

In the present embodiment, referring to fig. 1, the direct injection flush device 5 further includes a detection mechanism including a sensing block (not shown in the drawings) fixed to the rotary nozzle holder 53b and a proximity sensor 56a for detecting a position of the sensing block, the proximity sensor 56a is fixed to the base 51 by a sensor holder, the sensing block 56c rotates together with the rotary nozzle holder 53b, and a vertical swing angle range of the rotary nozzle holder 53b is detected by the sensing of the sensing block by the proximity sensor 56 a.

In the present embodiment, referring to fig. 1, the swing driving mechanism includes a swing connecting block 54p, a lifting driving assembly for driving the swing connecting block 54p to move up and down, and a link assembly for connecting the swing connecting block 54p and the rotary gun base 53b, wherein the link assembly includes a swing link 54q having one end fixedly connected to the rotary gun base 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 connecting block 54p through a hinge shaft 54 s. The lifting driving component drives the swinging connecting block 54p to move up and down, and drives the rotary spray gun seat 53b to rotate up and down through the swinging connecting rod 54r and the swinging rod 54 q. In the present embodiment, the rotary lance bases 53b of the two lance mechanisms on the left and right swing up and down in synchronization, and the recoil force of the direct injection flush device 5 at the time of spraying water is always symmetrical in the left-right direction.

In the present embodiment, the elevating 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, and specifically, referring to fig. 1 and 2, the pneumatic motor 54a is fixed at the lower end of the base 51 by a motor connecting plate 54b, and the driving shaft 54g is mounted 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 gear structure includes a cam eccentric plate 54k fixed to the driving shaft 54g, a cam bearing 54j fixed to the cam eccentric plate 54k, and a cam chute plate 54h having a bar chute 54i in which the cam bearing 54j is located. Referring to fig. 1 and 2, the intermediate transmission structure includes a reducer 54c and a plurality of gears 54e, the reducer 54c is fixed at the lower end of the base 51 through a reducer support 54d and is in transmission connection with the pneumatic motor 54a, the reducer 54c is provided with a gear 54e as an output gear 54e, the end of the driving shaft 54g is fixed with a gear 54e 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 mounted on a gear support 54l, and a gear shield 54m is provided to protect the gear 54 e.

In this embodiment, referring to fig. 1, preferably, the swing driving mechanism further includes a lifting guide assembly, the lifting guide assembly includes a lifting guide rod 54n and a lifting guide plate 54o installed on the lifting guide rod 54n in a vertically sliding manner, the swing connecting block 54p is fixed on the lifting guide plate 54o, and the lifting guide plate 54o is fixedly connected with the cam chute plate 54 h. The lifting guide plate 54o can make the up-and-down movement of the swing link block 54p more stable and reliable. In addition, a top cover plate is also 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, the output gear on the speed reducer 54c drives the input gear on the 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 the cam eccentric plate 54k to eccentrically rotate, the cam eccentric plate 54k drives the cam bearing 54j to eccentrically rotate, the cam bearing 54j slides in the strip-shaped chute 54i during eccentric rotation, and simultaneously drives the cam chute plate 54h to move up and down, the cam chute plate 54h drives the lifting guide plate 54o to slide up and down along the lifting guide rod 54n, the lifting guide plate 54o drives the swinging connecting block 54p to move up and down, and the swinging connecting block 54p drives the rotary spray gun seat 53b to vertically rotate through the swinging connecting rod 54r and the swing rod 54q, so as to drive the straight spray gun 53a to vertically swing.

Of course, the swing driving mechanism in the direct injection flush device 5 is not limited to the above-described specific structure, and in other embodiments, other conventional reasonable designs may be adopted to achieve the above-described functions.

Referring to fig. 7, 8 and 18, the invention further provides a washing device in the secondary side of the evaporator of the nuclear power station, which is used for entering the secondary side 7 of the evaporator to wash, the secondary side 7 of the evaporator is provided with a plurality of parallel transverse heat transfer pipe rows 8, each transverse heat transfer pipe row 8 comprises a plurality of transverse heat transfer pipes 81 arranged at equal intervals, the washing device comprises a cable channel device 1, a trolley device 2, a traveling device 3 and a control system, the cable channel 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 transverse heat transfer pipe rows 8, the trolley device 2 is movably installed on the cables 11, and the traveling device 3 is fixedly installed on the trolley device 2; the direct-injection flushing device 5 is characterized in that the direct-injection flushing device 5 is arranged on the trolley device 2 and fixedly connected with the traveling device 3, the front-back direction of the direct-injection flushing device 5 is along the extension 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 walking device 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 washing device of the invention is arranged in the secondary side 7 of the evaporator for cleaning, referring to fig. 18, and before actual use, the washing device can be arranged and debugged on the simulator 4 of the evaporator, referring to fig. 17. Two cables 11 of the cableway device 1 are used as a track for the trolley device 2 to travel, the trolley device 2 freely travels on the cables 11, and the traveling 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 work. The walking action of the walking device 3 and the swinging action of the direct injection flushing device 5 can be remotely controlled in a control room through a control system, and the field operation of workers is not needed.

In this embodiment, referring to fig. 1, a first connection block 57 and a second connection block 58 are respectively fixedly installed at both ends of the direct injection flushing device 5, the first connection block 57 is fixedly connected with the traveling device 3 by bolts, and the second connection block 58 is fixedly connected with the carriage device 2 by bolts.

In the present invention, the traveling device 3 may be any suitable device capable of driving the carriage device 2 and the slant spraying and direct spraying flushing device 5 on the cable 11. As a preferable design, referring to fig. 13, 14, 15 to 16, in this embodiment, the traveling device 3 includes a stepping driving mechanism 31 and clamping supporting mechanisms 32 disposed on the upper and lower sides of the stepping driving mechanism 31, each clamping supporting mechanism 32 includes a base plate 32a, two supporting corrugated blocks 32e symmetrically disposed on the base plate 32a from left to right, and a clamping driving assembly mounted on the base plate 32a, a limiting groove 32f for pressing on the heat transfer pipe 81 is disposed on each supporting corrugated block 32e, the clamping driving assembly drives the two supporting corrugated blocks 32e to move linearly from left to right to make the two supporting corrugated blocks 32e approach or separate from each other, and the clamping driving assembly can stabilize the positions of the two supporting corrugated blocks 32e, and is connected to the control system; the stepping driving mechanism 31 drives the two clamping and supporting mechanisms 32 to move back and forth relatively, and the clamping stepping driving mechanism 31 is connected with a control system.

In the present embodiment, referring to fig. 14 and fig. 15, as a preferred design, the step driving mechanism 31 of the traveling device 3 includes a step driving cylinder 31b, the step driving cylinder 31b is connected to the control system, and the cylinder and the piston rod of the step driving cylinder 31b are respectively fixed to the base plates 32a of the two clamping support mechanisms 32. And further, the stepping driving mechanism 31 further comprises a stepping slide block 31a and a stepping slide rod 31c, the stepping slide rod 31c is arranged along the front-back direction, the front end and the back end of the stepping slide rod 31c are fixed on the base plate 32a through a slide rod fixing seat 31d, and a position for supporting a slide rod clamping plate 31f to fix the slide rod fixing seat 31d is provided, the stepping slide block 31a is slidably mounted on the stepping slide rod 31c, and the stepping slide block 31a is fixedly connected with the piston rod of the stepping driving cylinder 31b through a Y-shaped connecting rod 31E. Specifically, in the present embodiment, the cylinder 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. Accordingly, the stepping slider 31a and the cylinder body of the stepping driving cylinder 31b move relatively by the telescopic movement of the stepping driving cylinder 31b, so that the clamping support mechanisms 32 on the upper and lower sides can be driven to move relatively to realize stepping movement. Of course, in other embodiments, the step driving mechanism 31 may also adopt other existing reasonable arrangements, and the above-mentioned driving of the two clamping and supporting mechanisms 32 to move back and forth relatively may also be implemented.

In the present embodiment, referring to fig. 14 and 16, as a preferred design, in the running device 3, the grip driving assembly in the grip supporting mechanism 32 includes a grip driving slider 32i, a grip 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, a 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, the left side and the right side of the clamping driving slider 32i are respectively connected with two supporting corrugated blocks 32e through clamping driving connecting rods 32j, particularly, the supporting corrugated block 32e is fixed on a corrugated block fixing seat 32d, one end of each clamping driving connecting rod 32j is hinged with the corrugated block fixing seat 32d through a hinge shaft 32r, and the other end of each clamping driving connecting rod 32j 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 slider 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 mounted 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. Therefore, when the clamping driving cylinder 32g moves to perform telescopic motion, the clamping driving piston rod 32h drives the clamping driving slider 32i to move back and forth, and the clamping driving slider 32i drives the corrugated block fixing seat 32d and the supporting corrugated block 32e to stably move linearly left and right through the clamping driving connecting rod 32j under the constraint of the left and right guide structures.

In this embodiment, referring to fig. 16, the clamping driving assembly preferably further includes a front and rear guiding structure for guiding the clamping driving slider 32i to move back and forth, specifically, the front and rear guiding structure includes a front and rear guiding rod 32q fixedly mounted on the base plate 32a, both ends of the front and rear guiding rod 32q are fixed on the base plate 32a through a front and rear fixing seat 32o, and a front and rear rod catch plate 32p is provided to fix the position of the front and rear fixing seat 32o, and the clamping driving slider 32i is mounted on the left and right guiding rods 32 m. Through setting up front and back guide structure for centre gripping drive slider 32i back-and-forth movement is more steady reliable.

The basic working principle of the walking device 3 in this embodiment is as follows: the size of the stopper groove 32f is determined according to the size of the heat transfer pipe 81. Referring to fig. 13, 14, 15, 16 and 19, the traveling device 3 is placed between two adjacent transverse rows 8 of heat transfer tubes, wherein the clamping and supporting mechanisms 32 have two states of opening, clamping and closing, and releasing, specifically, the clamping and driving assembly drives two supporting corrugated blocks 32e to move linearly left and right to separate the two supporting corrugated blocks 32e from each other, the limiting grooves 32f on the two supporting corrugated blocks 32e are respectively pressed against the heat transfer tubes 81 of the transverse rows 8 on the left and right sides of the clamping and supporting mechanism 32 and are kept stable, so that the clamping and supporting mechanisms 32 are firmly clamped on the two transverse rows 8 on the left and right sides, and the limiting grooves 32f simultaneously limit the clamping and supporting mechanisms 32 from moving back and forth, at this time, the clamping and supporting mechanisms 32 are in an opening and clamping state; the clamping driving assembly drives the two supporting corrugated blocks 32e to linearly move 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 pipe 81, the heat transfer pipe 81 does not limit the forward and backward movement of the clamping supporting mechanism 32, and the clamping supporting mechanism 32 is in a folded and loosened state at the moment. The traveling devices 3 have 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 opening and clamping state, the traveling devices 3 are fastened on the two heat transfer pipe transverse rows 8, and the working process of the front and back stepping motion of the traveling devices 3 is as follows: the control system controls one of the clamping and supporting mechanisms 32 to act, for example, the lower clamping and supporting mechanism 32 acts to become a folding and loosening state, the upper clamping and supporting mechanism 32 is still in an opening and clamping state, then the stepping drive mechanism 31 is controlled to drive the two clamping and supporting mechanisms 32 to move forward and backward by one end distance, at this time, because the lower clamping and supporting mechanism 32 is limited not to move forward and backward, the upper clamping and supporting mechanism 32 moves forward by one end distance, and after the next position, the upper clamping and supporting mechanism 32 is controlled to become an opening and clamping state to be clamped between the two heat transfer pipe transverse rows 8, and the upper clamping and supporting mechanism 32 completes one stepping movement; then the lower clamping support mechanism 32 is changed from an open clamping state to a close unclamping state, and similarly, the step driving mechanism 31 acts to drive the lower clamping support mechanism 32 to move forward a distance, and then to be changed to the open clamping state after reaching a specified position, so as to clamp between the two heat transfer pipe horizontal rows 8, and the lower clamping support mechanism 32 completes one step movement. In this way, the upper and lower clamping support mechanisms 32 are sequentially moved forward in a stepping manner to realize forward movement of the traveling device 3, and similarly, the traveling device can be moved backward in a stepping manner, so that the traveling device 2 can be driven to move forward and backward on the cable 11.

In the present embodiment, referring to fig. 14, preferably, in the clamping and supporting mechanism 32, a baffle 32b is further provided at the front and rear sides of the base plate 32a, and a cover plate 32c is provided to be opposite to the base plate 32a in the up-down direction, and an installation space for clamping the driving assembly, the front-rear guiding structure, the left-right guiding structure and the like is formed between the base plate 32a, the cover plate 32c and the two baffle plates 32b, and the base plate 32a, the cover plate 32c and the two baffle plates 32b play a role in protection. In addition, a carriage connecting block 33 for connecting with the carriage device 2 is fixedly arranged at the rear end of the holding supporting mechanism 32 clamped at the upper side, and a flushing water connecting block 34 for connecting with the direct-injection flushing device 5 is fixedly arranged at the front end of the holding supporting mechanism 32 clamped at the lower side, so that the connection and the fixation are convenient.

Of course, the holding and supporting mechanism 32 of the traveling device 3 is not limited to the above-mentioned structure, and in other embodiments, the stepping driving mechanism 31 may also adopt other existing reasonable arrangements, and the above-mentioned driving function may also be realized

In the present embodiment, referring to fig. 17, in the cableway device 1, the two ends of the cable 11 are connected to the hand holes on the 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 fixedly connected to two sides of the outer wall of the secondary side 7 of the evaporator respectively, one end of a cable 11 is fixed in the fixing component, the other end of the cable is installed in the tensioning component, the tensioning component can pull the cable 11 to be tensioned, and the cable 11 can be specifically made of a steel wire rope.

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

Referring to fig. 10, in the present embodiment, the tensioning assembly also includes a support frame composed of a support end plate 14, a support flange 13 and a support rod 15, the support end plate 14 and the support flange 13 are respectively fixed at two ends of the support rod 15, the support flange 13 is connected with the 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 support frame are basically the same as those of the support 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 that drives 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 bolt which penetrates through the threaded mandril 19 and is screwed on the threaded mandril 19, one end of the threaded mandril 19 is fixed on the supporting end plate 14, the other end of the threaded mandril 19 is smoothly inserted into the fixing plate 17, two nuts on the threaded mandril 19 are positioned on the inner side of the fixing plate 17 facing the secondary side 7 of the evaporator, and the nuts are pressed against the inner side of the fixing plate 17 through outward rotation to clamp the structure position, so that the cable 11 is tensioned.

Referring to fig. 8 and 12, in the present embodiment, the carriage assembly 2 includes two carriage assemblies disposed opposite to each other in the front-rear direction, one of the two carriage assemblies is fixedly connected to the traveling device 3, and the other carriage assembly 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 abutted to the left sides or the right sides of the cables 11, and a limiting space for the cables 11 to pass through is formed between the transverse rollers 24 and the trolley body, after the trolley assembly is installed, the cables 11 cannot be separated from the limiting space, 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 walking is stable and reliable. The transverse roller 24 and the vertical roller 23 are bearing rollers, and the vehicle body comprises a lower seat 21 and two upper seats 22 respectively arranged at the left side and the right side of the lower seat 21. Go up saddle 22 and pass through the bolt and install in lower saddle 21 upper end, vertical gyro wheel 23 is installed on lower saddle 21, and horizontal gyro wheel 24 is installed on last saddle 22, through the dismouting of last saddle 22, makes things convenient for the installation of dolly subassembly on two cables 11. Preferably, a tapered locating pin 25 is mounted on one or both carriage assemblies for quick locating mounting with the running gear 3 or the direct injection flush device 5.

As a preferred design, a sensor for detecting the supporting and pressing degree of the clamping and supporting mechanism 32 and a sensor for detecting the stepping distance of the walking device 3 are also included in the flushing device.

Referring to fig. 17 and 18, the operation process of the flushing device in the embodiment of the present invention is as follows: (1) respectively installing and fixing a fixing component and a tensioning component of the cableway device 1 on hand hole flange surfaces 6 on two sides of an evaporator secondary side 7, and installing and tensioning a cable 11; (2) the trolley device 2, the walking device 3 and the direct injection flushing device 5 are installed as required, a worker pushes the direct injection flushing device 5 into a hand hole of a secondary side 7 of the evaporator, the distance between heat transfer pipes 81 in the transverse rows 8 of the heat transfer pipes is well positioned through a positioning ruler, a control room is informed to control the fixing and pressing of the walking device 3 between the two transverse rows 8 of the heat transfer pipes, and the direct injection flushing device 5 sprays water to perform flushing work; (3) after the cleaning at one position is finished, the walking device 3 acts to drive the direct injection flushing device 5 to move step by step to the next working position, and then the direct injection flushing device is fixed and starts to flush again; (4) the operation is repeated in a circulating way until the cleaning work of all the positions of the two transverse rows 8 of heat transfer pipes is completed; (5) according to the above-described processes (1) to (4), the flushing device performs the flushing operation between any adjacent transverse rows 8 of heat transfer tubes, thereby completing the overall cleaning operation of the heat transfer tubes 81 and the tube sheets in the secondary side 7 of the evaporator. Wherein, the supporting and pressing degree and the stepping position distance of the clamping and supporting mechanism 32 are all fed back to the control system through the sensor, so that the accuracy and the reliability of the flushing operation of the equipment are ensured.

After the washing equipment of the invention is cleaned, the cleanliness of the heat transfer tubes 81 and the tube plates in the secondary side 7 of the evaporator is checked by a camera arranged in the washing equipment, and after washing, the residual sludge on the heat transfer tubes 81 and the tube plates in the secondary side 7 of the evaporator can meet the following standards: no flaky sludge accumulation exists, and 80% of junctions of the heat transfer tubes and the tube plates are clearly visible; the tube sheet base metal should be clearly visible for 80% of the tube sheet area.

From the above, the flushing device in this embodiment, through cableway device 1, dolly device 2, running gear 3, and control system, can make directly spout bath device 5 and enter into in the steam generation secondary side and wash its heat-transfer pipe 81 and tube sheet etc. utilize running gear 3 to ensure directly to spout bath device 5 and can be reliable and stable when spraying water, and realize directly spouting bath device 5 step motion in evaporimeter secondary side 7 with the help of heat-transfer pipe 81, wash different positions, job stabilization is reliable, the risk that probably has the flushing device and can't take out in evaporimeter secondary side 7 has also been avoided.

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

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

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 evaporator secondary side (7), heat-transfer pipe horizontal rows (8) include many heat-transfer pipes (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, the left side and the right side of the base (51) are respectively provided with a spray gun mechanism, the base (51) is internally provided with a water pipe connector, a rotary connector and an internal water channel communicated with the water pipe connector and the rotary connector, the spray gun mechanism comprises two rotary spray gun seats (53b) with water paths inside, a plurality of straight spray guns (53a) fixedly connected to the rotary spray gun seats (53b) and rotary joints, the straight spray gun (53a) is communicated with a water channel in the rotary spray gun seat (53b), the rotary spray gun seat (53b) is connected to the rotary connector through a rotary connector, the water channel in the rotary spray gun seat (53b) is communicated with the rotary connector through the rotary connector, the rotary spray gun base (53b) can rotate up and down around the rotary joint, and the spraying direction of the straight spray gun (53a) is vertical to the front-back 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 transverse rows (8) of heat transfer pipes, and the front and back directions of the direct-injection flushing device (5) are along the transverse arrangement direction of the transverse rows (8) of heat transfer pipes and the length direction of the heat transfer pipes (81) along the up and down directions.

2. The direct injection flush device of claim 1, wherein: a plurality of straight spray guns (53a) in the spray gun mechanism are arranged along the front-back direction, and the distance between the straight spray guns (53a) is one time or multiple times of the distance between the heat transfer pipes (81) in the heat transfer pipe transverse row (8).

3. The direct injection flush device of claim 1, wherein: the detection mechanism comprises a sensing block fixed with the rotary spray gun seat (53b) and a proximity sensor (56a) used 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 (54p), a lifting driving assembly for driving the swing connecting block (54p) to move up and down and a connecting rod assembly for connecting and driving the swing connecting block (54p) and the rotary spray gun base (53b), the connecting rod assembly comprises a swing rod (54q) and a swing connecting rod (54r), one end of the swing rod is fixedly connected with the rotary spray gun base (53b), one end of the swing connecting rod is hinged to the swing rod (54q), and the other end of the swing connecting rod (54r) is hinged to 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 (54n) and a lifting guide plate (54o) which is installed on the lifting guide rod (54n) in a vertically sliding mode, and the swing connecting block (54p) is fixed on the lifting guide plate (54 o).

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

7. The utility model provides a washing equipment in nuclear power station evaporator secondary side for enter into and wash in evaporator secondary side (7), have a plurality of heat-transfer pipe horizontal rows (8) that are parallel to each other in evaporator secondary side (7), heat-transfer pipe horizontal rows (8) include many heat-transfer pipes (8) of arranging along horizontal equidistance, its characterized in that: the flushing equipment comprises a cableway device (1), a trolley device (2), a walking device (3) and a control system, wherein the cableway device (1) comprises two transverse cables (11) arranged in an evaporator secondary side (7), the two cables (11) are positioned between two adjacent transverse rows (8) of heat transfer pipes, the trolley device (2) is movably arranged on the cables (11), and the walking device (3) is fixedly arranged on the trolley device (2); the direct-injection flushing device (5) as claimed in any one of claims 1 to 6, wherein the direct-injection flushing device (5) is mounted on the carriage device (2) and is fixedly connected with the traveling device (3), the front-rear direction of the direct-injection flushing device (5) is along the extending direction of the cable (11), and the traveling device (3) drives the carriage 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 walking device (3) in a control mode and is also connected with the swing driving mechanism of the direct-injection flushing device (5) in a control mode.

8. The rinsing device according to claim 7, characterized in that: the cableway device (1) further comprises a fixing component and a tensioning component which are fixedly connected to two sides of the outer wall of the secondary side (7) of the evaporator respectively, 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 be tensioned.

9. The rinsing device according to claim 8, characterized in that: the fixing component comprises a cable tie plate (12), the cable tie plate (12) is provided with a semi-annular mounting groove, and one ends of two cables (11) are connected into a whole and embedded in the mounting groove of the cable tie plate (12); the tensioning assembly comprises a clamping structure and an adjusting structure for driving the clamping structure to be close to or far away from the secondary side (7) of the evaporator, and one end of the cable (11) is clamped in the clamping structure.

10. The rinsing device according to claim 7, characterized in that: 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 the two cables (11), each roller structure comprises a transverse roller (24) erected on the upper side of the corresponding cable (11) and a vertical roller (23) abutted to the left side or the right side of the corresponding cable (11), and a limiting space for the cables (11) to penetrate through is formed among the transverse rollers (24), the vertical rollers (23) and the trolley body.

Images