KR20020032131A - Equipments for cleaning sluges in vapor generator - Google Patents

Abstract

PURPOSE: An equipment for cleaning up sludge of steam generator is provided to be usable regardless of arrangement of heat transfer pipes in a steam generator. CONSTITUTION: A rail(23) is installed inside a steam generator and has a part cut to extend from one side manual working opening to the other side manual working opening without interruption of a central supportive rod. A cleaner robot(25) is put into the steam generator by the rail to clean up. A nozzle connective part is installed on the cleaner robot to install various nozzle main bodies. A hose and cable elevator system is constructed by attaching additional flange on the manual working opening of the steam generator and installing a rail fixing board and a supportive structure, to keep tension of a cable and a hose, connected with the cleaner robot, stable and prevent entanglement of the cable and the hose. A visual device fixing part and a lens cleaning nozzle are installed on the cleaner robot to inspect whether high pressure water is accurately sprayed through a nozzle on a heat transfer pipe.

Description

Equipments for cleaning sluges in vapor generator

The present invention relates to a steam generator sludge cleaning equipment for removing sludge deposited on a lower tubesheet in a steam generator using high pressure water.

In nuclear power plants, turbines are powered by steam generated by heating water with heat generated during nuclear fission of uranium, and electricity is generated by rotating generators using this torque. Inside the steam generator, heat transfer tubes are densely arranged. Inside the heat transfer tubes, hot water contaminated with radiation flows, and low temperature uncontaminated water flows to the outside. This steam is generated by rotating turbines and generators with the power of this steam. However, the sludge accumulates in the steam generator according to the number of years of operation, which lowers the thermal efficiency of the heat transfer tube inside the steam generator and damages the heat transfer tube, thereby shortening the life of the steam generator. The components of the sludge are mainly iron oxide and copper oxide, which, if not removed, agglomerate and stick between heat pipes, generate heat stress, and cause sludge to flow through the water and wear the heat pipe. In order to reduce the effect of sludge that has an adverse effect on the life of the steam generator, there are facilities and operation procedures for discharging the internal coolant out of a certain amount during the operation of the steam generator, but practically, this method alone does not remove the sludge effectively. The phenomenon of depositing continuously is found. Therefore, the steam generator manufacturer recommends to clean the steam generator periodically during the preventive maintenance every year. In order to clean the inside of the steam generator, first, the chemical cleaning method that selectively dissolves and removes only iron oxide and copper oxide, which are the main components of the sludge, using a special chemical, and second, the sludge removed while spraying the high pressure washing water to the sludge. Inhalation with water and then sent to the filtration system to remove solid sludge through the filter and recirculate only clean water. And ultrasonic method for removing. This patent relates to steam generator sludge cleaning equipment of high pressure water cleaning method.

In the prior art, there are a number of US patents relating to methods and equipment for spraying high pressure water to remove sludge deposited on a heat transfer tube lower support plate of a steam generator.

U.S. Patent No. 2,036,871 is a device that can be used when the heat generator's heat pipe arrangement is a right-angled array.The robot rail is put through the steam generator hand hole to cover the center tie rod, and then the cleaning robot is railed. It is a method of removing the sludge deposited inside the steam generator by injecting high pressure water from the nozzle mounted on the cleaning robot by inputting through the nozzle. This equipment had to install the rail twice in order to insert the cleaning robot, and because the rail was divided into several parts, the amount of radiation required by the workers was relatively high due to the time required to assemble them. In the case of a rectangular array of heat pipes, this equipment was used to clean sludge accumulated between heat pipes. However, in the case of a severely arranged steam generator, sludge deposited behind the heat pipes could not be effectively removed. The reason is that the spacing between the tubes is narrow, so that a lance cannot be effectively introduced between the heat pipes.

In addition, the U.S. Patent No. 4,700,662 has designed the nozzle head to clean the triangular heat transfer tube, but the cleaning nozzle is fixed and does not describe the mechanism for precisely moving the nozzle. Therefore, there is a risk of injecting the high-pressure water perpendicular to the surface of the heat pipe to cause erosion of the heat pipe. In addition, there is a problem that it is not possible to effectively remove the foreign matter attached to the heat transfer pipe itself by using a method of spraying high pressure water on the tube sheet using a plurality of fixed nozzles.

Another U.S. Patent No. 4,276,856 is a method of injecting a mechanically controlled nozzle head through a steam generator hand tool, and the outlet of the nozzle is not a general circular shape but is made in a square shape so that it cannot be used or has low cleaning efficiency. .

In addition, US Patent No. 4,515,747 puts a cart of several stages connected to the outer circumference of the steam generator tube sheet, and a nozzle mounted on the trolley sprays high pressure water from the outer portion to the center portion. . At both ends of the trolley, the strings are suspended and the strings are used to clean the high pressure water jet. The disadvantage of this method is that it is difficult to accurately set the high pressure water injection position, and there is a possibility of heat pipe damage due to direct friction between the bogie and the heat pipe.

In the case of US Patent No. 5,813,370, the high-pressure water is sprayed 90 degrees, 30 degrees, and 150 degrees between the tubules in a manner suitable for sludge cleaning of a steam generator having a triangular arrayed heat pipe, but it is similar in appearance, function, and control method. It is a completely different form from the invention.

In addition, in the case of US Pat. No. 5,782,209, unlike the present invention, a sludge is injected by introducing a lance between heat transfer tubes of a steam generator having a right angle or triangular heat transfer tube.

In addition, there are related U.S. Patent Nos. 5,069,172, 5,341,406, 5,411,043, 4,424,769, 4,513,747, 4,676,201, etc., but the cleaning method, equipment type, control method, etc. are different from the present invention.

In order to solve this problem, the present invention can be used irrespective of the arrangement of the heat exchanger tube in the steam generator, and the nozzle is easily replaced by the removable cleaning nozzle body, and the installation of the rail is easy to reduce the exposure of the operator and the heat transfer tube lower support plate. It is an object of the present invention to provide a steam generator sludge cleaning equipment for cleaning the entire area of the high pressure water.

1: Schematic diagram of the steam generator

2: Horizontal cross-sectional view of the tube tube of the triangular array heat generator steam generator

3: Assembled steam generator, hose and cable lift system

4: Hose and Cable Lift System

(a) Front view of hose and cable lift system

(b) Hose and Cable Lift System Side View

(c) Hose and Cable Lift System Top View

(d) to (f) Loss and Cable Lift System Cross Section

(g) Hose and Cable Lift System D View

5: Assembly diagram of steam generator sludge cleaning equipment

6: Cleaning robot rail

(a) Top view of cleaning robot rail

(b) Front view of cleaning robot rail

(c) Rail view and rail side view from hand tool

(d)-(i) Cleaning robot rail GG cross section-LL cross section

7: Cleaning robot rail parts-lex gear

(a) Front view of rack gear

(b) Rack Gear Side View

8: cleaning robot

(a) Top view of cleaning robot

(b) Cleaning robot side view

(c) to (g) Cleaning robot cross section

9: 90 degree cleaning nozzle body

(a) Top view of 90 degree cleaning nozzle body

(b) 90 degree cleaning nozzle body front view

(c) Inside view of the 90 degree cleaning nozzle body

(d)-(j) 90 degree cleaning nozzle body sectional drawing

10: 30 degree cleaning nozzle body

(a) 30 degree cleaning nozzle body front view

(b) 30 degree cleaning nozzle body inside

(c) Top view of 30 degree cleaning nozzle body

(d) 30 degree cleaning nozzle body BB sectional drawing

(e) 30 degree cleaning nozzle body left side view

(f) 30 degree cleaning nozzle body CC cross section

(g) 30 degree cleaning nozzle body right side view

* Explanation of symbols for main parts of drawings

Steam generator 2. A heat pipe

Heat plate lower support plate 4. Upper support plate

Inlet nozzle 6. Outlet nozzle

Sludge 8. Vertical direction

9. Slope direction 10. Hand tool

Injection nozzle 12. Injection water direction

Suction nozzle 14. Hose and Cable Lift System

15.Hose Mount 16. Upper pulley

Lower pulley 18. Lead weight

19. Flange 20. Supporting Structure

21.Vertical stand 22. Rail guide

23.Rail 24. Rail fixing bolt

25. Cleaning Robot Center support rod

27.Rail Incision Ends 28. Rack gear

DC motor 30. Reduction gear

31. Bevel Gear 132. Bevel gear 2

33. Pinion Gear 90 degree nozzle body

30 degree nozzle body 36. 90 degree nozzle

37.DC motor with encoder Reduction gear

39 degree nozzle block reducer

DC motor 42. Bevel gear

43 degree nozzle block 44. Nozzle connection

45. Nozzle body fixing bolt 46. Visual device fixing part

47. Lens Purification Nozzle 48. Hose Information Home

49. Robot release lever 50. Push wheel

51.Spring 52. Home wheel

53. Flat wheels 54. Push-wheel guide

55,57. High Pressure Connectors 56,58. High pressure water tube

59 degree nozzle 60. Incision

61. Nozzle block rotation axis 62. Square rods

In order to achieve the above object in the present invention, in the sludge cleaning equipment for removing the sludge deposited in the heat transfer tube lower support plate 3 inside the steam generator 1 by high-pressure water, the inside of the steam generator 1 One side is cut into one that is installed is inserted into the rail (23) is installed so as not to be disturbed by the central support rod 26 from one hand tool 10 to the other hand tool 10 '; A cleaning robot (25) which is introduced into the steam generator (1) through the rail (23) to perform a cleaning operation; A nozzle connecting portion 44 installed at the cleaning robot 25 to mount various nozzle bodies; A separate flange 19 is attached to the hand tool 10 of the steam generator 1, and the rail holder 22 and the support structure 20 are mounted on the flange 19 to be introduced into the steam generator 1. A hose and cable lift system 14 for maintaining a constant tension of the cables and hoses connected to the cleaning robot 25 and preventing them from being twisted; The visual device fixing unit and the lens purifying nozzle for checking whether the high-pressure water is accurately injected into the heat pipe through the nozzle are mounted on the cleaning robot 25.

In the present invention, the cleaning robot 25 has two groove wheels 52 and the pinion gear 33 traveling on the rack gear 28 and used to exchange various types of nozzle blocks through the nozzle connecting portion 44. The nozzle main body attached to the cleaning robot 25 is used to change the rotational motion of the driving device such as a motor in a specific direction through a plurality of bevel gears 31 and 32 and to use the rotational motion in a predetermined direction. It is characterized in that the high-pressure water can be injected to the sludge deposited on the heat transfer tube lower support plate 3 while rotating the nozzles facing the nozzle rotation axis.

In addition, the nozzle body is a high-pressure water is supplied to one nozzle block, or divided into two branches in some cases is supplied to two nozzle blocks and the high pressure water is injected through a plurality of nozzles attached to the nozzle block, the nozzle block rotation axis when spraying The nozzle block rotates about a certain angle about 61 and rotates the nozzle block equipped with a plurality of nozzles facing the driving direction of the cleaning robot 25 in the 90 degree direction by using an electric motor or another driving source. And, it is characterized in that the cross section is attached to the nozzle connection portion 44 of the inverted trapezoidal shape to be easily removable to the cleaning robot (25).

The rail 23 for guiding the cleaning robot 25 has a rail fixing bolt 24 mounted at both ends of the rail 23, and the rail fixing bolt 24 and the rail fixing part 22 are nuts. It is fixed, the rack gear 28 and the square rod 62 is mounted in the U-shaped rail, characterized in that the cross-section of the processing portion and the immediately lower end of the rack gear 28 is trapezoidal or triangular.

In addition, the nozzle connection portion 44 is characterized in that the inverted trapezoidal shape that can be easily removable with the cleaning robot (25).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows the internal configuration of the steam generator (1) is a plurality of heat pipe (2) of the inverted U-shape in the form of a bundle, the lower portion is fixed to the lower heat transfer tube (tubesheet) (3), the upper Is fixed to a plurality of upper support plates (4) is to maintain the shape of the entire structure, the lower tube is supported by a plurality of heat transfer tube (3).

The function of the steam generator (1) is to transfer the heat to the low-temperature water filling the outside of the heat pipe as the high temperature and high pressure water flowing out of the reactor (not shown) flows through the inlet nozzle (5) and flows through the heat pipe (2). After the temperature drops, the water enters the reactor (not shown) through the outlet nozzle (6).

During this series of operations, sludge 7 mainly composed of metal oxides is deposited on the heat transfer tube lower support plate 3 of the steam generator 1. This sludge increases gradually as the number of years of operation increases, thereby lowering the heat transfer efficiency of the heat transfer tube 2 and promoting corrosion of the heat transfer tube 2 and the lower support plate 3, and ultimately, the life of the steam generator 1 Shorten.

2 shows a plan view of the lower heat transfer tube lower support plate 3 of the steam generator 1 having a triangular array heat transfer tube. In order to effectively remove the sludge 7 deposited between the heat transfer tubes 2, the high-pressure water must be sprayed in the inclined direction 9 according to the arrangement of the heat transfer tubes 2 as well as the vertical direction 8.

The sludge 7 in the center portion of the heat transfer tube lower support plate 3 is moved to the edge portion by high pressure water injection. There are two or four hand tools 10 in the steam generator 1, and in one or more injection nozzles 11, water flows in the direction of the edge 12 of the heat transfer pipe lower support plate 3 depending on the situation. The water and sludge mixture is sucked from one or more suction nozzles 13 and sent to a purification system (not shown) to filter the sludge and circulate clean water back into the steam generator (1). This circulation operation is continued to remove the sludge 7 deposited in the steam generator 1.

3 shows the hose and cable lift system 14 mounted on the steam generator 1. The hose and cable lift system 14 is bolted to the hand tool 10 so that the high pressure hose and the electric cable are not twisted or caught in the structure inside the steam generator 1 when it is introduced into the steam generator 1. It is an apparatus for doing so.

4 shows a detailed view of the hose and cable lift system 14, wherein the high pressure water supply hose (not shown) is mounted to the hose mount 15 as a quick-release connector. Hose attachment material 15 is for high pressure hoses and the like connected to the external device is firmly connected to the hose and cable lift system 14 to facilitate the cleaning equipment operation.

The high pressure hose connected to the quick detachable connector mounted on the hose mounting unit 15 has the upper pulley 16 rounded and then the cleaning robot 25 of the steam generator 1 with the lower pulley 17 extended. When traveling inside, the high pressure hose and the electric cable have a constant tension by the weight of the lead weight 18 is connected to the upper pulley 16 and the iron wire. Two upper pulleys 16 may be installed to adjust the tension of the high pressure hose and the electric cable, respectively.

The hose and elevating cylinder 14 and the steam generator 1 are bolted using the flange 19, the support structure 20 is also connected to the flange 19 by bolts or welding. The support structure 20 is equipped with two cylindrical pipes so that it can be mounted on the vertical table (21).

The rail 19 is mounted on the flange 19 so that the rail 23 inserted into the steam generator 1 through the hand tool 10 is fixed.

Figure 5 shows the assembly of the steam generator sludge cleaning equipment. The rail fixing bolts 24 mounted on both ends of the rail 23 are fastened by the rail fixing parts 22 and nuts, and the rail 23, the hose, and the cable lift system 14 are integrated. In the cleaning robot 25 is attached to the nozzle is to enter along the rail (23).

When the rail 23 is introduced into the steam generator 1 through the hand tool 10, the rail 23 is opposed to the other side through the central support rod 26 which rises upward in the center of the heat transfer tube lower support plate 3. The center portion is cut out to reach the hand tool 10. When the rail 23 is introduced into the steam generator 1, the side having the cutout portion 60 is first introduced through the hand tool 10, and the rail fixing bolt 24 is removed. When the rail cutting end 27 reaches the opposite hand tool, the rail fixing bolt 24 is fixed to the rail 23 and then fixed to the rail fixing part 22 with a nut. This is for installing the rail 23 to avoid the central support rod (26).

In FIG. 6 (c), when the cross section of the rail 23 is seen, one rack gear 28 is mounted, and the other is a flat quadrangular rod 62.

In Figure 7 (a) is a side view of the rack gear 28, (b) is a cross-sectional view. In the cross section of the rack gear 28, the gear is machined in the upper part of the trapezoidal cross section so that the cleaning robot 25 has the positioning accuracy in the traveling direction and the traveling vertical direction in a narrow space.

8 shows the cleaning robot 25 body. The cleaning robot 25 is composed of a DC motor 29 with an encoder, and the motor is connected to the reduction gear 30 and the reduction gear 30 is connected to the bevel gear 1 31. The bevel gear 1 31 is connected to the bevel gear 2 32 so that the rotational movement of the DC motor 29 is changed by 90 degrees and is transmitted to the pinion gear 33. As the pinion gear 33 rotates on the rack gear 28, the cleaning robot 25 moves forward or backward along the rail 23.

The lower part of the cleaning robot 25 has a nozzle connecting portion 44 for connecting the nozzle body to attach the 90-degree nozzle body 34 or the 30-degree nozzle body 35 according to the application to perform the cleaning operation. The nozzle body fixing bolt 45 is mounted on the side of the nozzle connection part to fit the cleaning connector 25 to the body connection part 45 mounted on the 90 degree nozzle body 34 or the 30 degree nozzle body 35, and then the nozzle. Fix using a body fixing bolt (45). The cleaning robot 25 is provided with a vision device 46 such as an endoscope or a camera and a lens purifying nozzle 47 so that when the high pressure water is injected into the heat transfer pipe 2, the high pressure water injection direction is precisely directed between the heat transfer tubes 2. Can be monitored. The connecting cable and the hose of the visual device 46 and the lens purifying nozzle are connected out of the steam generator 1 through the hand tool 10 along the hose guide groove 48.

The cleaning robot 25 is provided with a safety device so that the cleaning robot 25 can be taken out of the steam generator 1 even when the control function such as loss of power supply is lost. When the robot removal lever 49 is pulled, the parts connected thereto move the bevel gear 1 31 to the right while rotating the pinion gear 33 so that the pinion gear 33 can freely rotate.

The four push wheels 50 move along the push wheel guide surface 54 when the cleaning robot travels along the rails 23, and two groove wheels 52 and two flat surfaces by the force of the spring 51. The wheel 53 is seated on the rack gear 28 and the square rod 62 so that the position of the cleaning robot 25 can be accurately determined, and the 90 degree nozzle block 39 and 30 degree connected to the cleaning robot 25 are When the nozzle block 43 distributes the high pressure water, it prevents the robot from shaking in response.

In FIG. 9, the 90-degree nozzle body 34 has a plurality of 90-degree nozzles 36 attached in opposite directions to minimize reaction force due to high-pressure water injection. An encoder-mounted DC motor 37 and a reduction gear 38 are installed inside the 90-degree nozzle main body 34, and the rotational motion of the DC-motor 37 is transmitted to the 90-degree nozzle block 39, thereby providing a 90-degree nozzle. As the 36 rotates, high pressure water is sprayed to remove the sludge.

FIG. 9 (h) shows a h-h cross-sectional view of the 90 degree nozzle 36 portion upon rotation of the 90 degree nozzle block 39. The high pressure water hose (not shown) is detachably attached to the high pressure water connector 55 in a quick detachable manner, and the high pressure water is transferred to the 90 degree nozzle block 39 through the high pressure water tube 56 and through the 90 degree nozzle 36. Sprayed. This high pressure jet water moves the sludge 7 deposited on the heat transfer tube lower support plate 3 to the edge of the heat transfer tube lower support plate 3. The sludge 7 moved to the edge is moved toward the suction nozzle 13 by the water introduced by the injection nozzle 11 and discharged out of the steam generator by the suction pump (not shown).

10 shows the state of the 30 degree nozzle body 35. The reduction gear 40 and the encoder-mounted DC motor 41 are mounted inside the 30 degree cleaning nozzle body, and the rotational movement of the DC motor 41 is arranged in a 30 degree direction through several bevel gears 42. It is transmitted to the nozzle block 43 in a rotational motion. The 30 degree nozzle block 43 rotates within a predetermined angle range around the nozzle rotation axis 61, and the 30 degree nozzle 59 attached thereto sprays high pressure water on the entire surface of the heat transfer tube lower support plate 3. do. The high pressure water is introduced into the 30 degree nozzle block through the high pressure water tube 58 through the high pressure hose (not shown) detachable from the high pressure water connector 57, into the 30 degree nozzle block, and the 30 degree nozzle (59). ) Is injected into the lower support plate (3) of the heat transfer tube of the steam generator (1).

The steam generator sludge cleaning equipment of the present invention can be utilized to clean the heat transfer tube and the heat transfer tube lower support plate of the steam generator in a triangular arrangement as well as the conventional steam generator in which the heat transfer tube is rectangular in shape. By changing the shape of the steam generator, it can be reused by replacing only the nozzle body, and the designed rail can be installed in a short time even if there is a central support rod of the steam generator. When the rectangular array steam generator is cleaned, the nozzle block itself can be rotated so that high pressure water can be sprayed to the entire area of the lower plate of the heat pipe between the heat pipes arranged in the 30 degree direction. To perform the cleaning operation efficiently It has the advantage.

Claims (11)

In the sludge cleaning equipment to remove the sludge deposited on the lower support plate (3) inside the steam generator (1) by spraying high pressure water, One part is cut into the steam generator 1 and installed inside the steam generator 1 so that one hand tool 10 may extend from one hand tool 10 to another hand tool 10 ′ without being disturbed by the central support rod 26. A rail 23 to be installed; A cleaning robot (25) which is introduced into the steam generator (1) through the rail (23) to perform a cleaning operation; A nozzle connecting portion 44 installed at the cleaning robot 25 to mount various nozzle bodies; A separate flange 19 is attached to the hand tool 10 of the steam generator 1, and the rail holder 22 and the support structure 20 are mounted on the flange 19 to be introduced into the steam generator 1. A hose and cable lift system 14 for maintaining a constant tension of the cables and hoses connected to the cleaning robot 25 and preventing them from being twisted; A steam generator sludge, characterized in that the visual device fixing part 46 and the lens purifying nozzle 47 are mounted on the cleaning robot 25 to check whether the high-pressure water is correctly injected into the heat pipe 2 through the nozzle. Cleaning equipment. The method of claim 1, The cleaning robot 25 has two groove wheels 52 and the pinion gear 33 traveling on the rack gear 28, and the nozzle connection part 44 allows the nozzle blocks of various types to be used interchangeably. Steam generator sludge cleaning equipment characterized in that. The method of claim 1, The nozzle body attached to the cleaning robot 25 is used Through several bevel gears, the rotational motion of the driving device such as a motor is changed in a specific direction, and the nozzles directed in a specific direction are rotated about the nozzle rotation axis by using the rotational motion, and the high pressure is applied to the sludge deposited on the lower support plate 3 of the heat pipe. Steam generator sludge cleaning equipment characterized in that the water can be sprayed. The method of claim 3, wherein The nozzle body may be supplied with a high pressure water in one nozzle block or divided into two branches and supplied with two nozzle blocks, and the high pressure water may be injected through a plurality of nozzles attached to the nozzle block. Steam generator sludge cleaning equipment, characterized in that the nozzle block is rotated within a predetermined angle to the center. The method of claim 3, wherein The nozzle body rotates a nozzle block equipped with a plurality of nozzles facing in the driving direction of the cleaning robot in a 90 degree direction by using an electric motor or another driving source, and attaches a nozzle connection part having an inverted trapezoidal cross section to the cleaning robot. Steam generator sludge cleaning equipment, characterized in that to be easily removable. The method of claim 1, The rail 23 for guiding the cleaning robot 25 is Rail fixing bolts 24 are mounted at both ends of the rail 23, and the rail fixing bolts 24 and the rail fixing parts 22 are fixed with nuts, and rack gears 28 are formed inside the U-shaped rails. And a square rod (62), wherein the cross section of the processing portion and the lower end of the rack gear (28) is trapezoidal or triangular. The method according to claim 3 or 4, Steam nozzle sludge cleaning equipment, characterized in that the nozzle connection 44 is inverted trapezoidal shape that can be easily removable with the cleaning robot (25). The method of claim 1, Steam generator sludge cleaning equipment, characterized in that the endoscope or the camera is mounted on the visual device fixing unit mounted to the cleaning robot (25). The method of claim 1, The cleaning robot 25 is moved along the rail 23 by the four push wheels 50 and moves along the push wheel guide surface 54 while the two groove wheels 52 are driven by the force of the spring 51. And two flat wheels 53 are mounted on the rack gear 28 and the square rod 62 so that the position of the cleaning robot 25 can be accurately determined, and the 90 degree nozzle block 39 connected to the cleaning robot 25 is provided. And 30-degree nozzle block (43) to prevent the washing robot from shaking in response to the high-pressure water spraying steam generator sludge cleaning equipment, characterized in that. The method of claim 1, When the cleaning robot 25 loses a control function such as a loss of power supply, when the robot removal lever 49 is pulled out, the parts connected thereto move the bevel gear 1 31 to the right while the pinion gear 33 moves. Steam generator sludge cleaning equipment characterized in that it is provided with a safety device that can be freely rotated to be drawn out of the steam generator (1). The method of claim 1, The hose and cable lift system 14 The cleaning robot 25 runs inside the steam generator 1 while the high-pressure hose connected to the quick-release connector mounted on the hose mount turns around the upper pulley 16 and the lower pulley 17 below. When the high pressure hose and the electric cable, etc. to have a constant tension by the weight of the lead weight 18 is connected to the upper pulley 16 and the iron wire 17, the upper pulley 16 is installed two high pressure Steam generator sludge cleaning equipment, characterized in that to adjust the tension of the hose and the electric cable respectively.