JP2009281686A - Tube position transfer device for water wall tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry out transfer of a tube position of a water wall tube by applying large force to the water wall tube by a series of processes even if a gap between the water wall tube and an adjacent water wall tube is narrow. <P>SOLUTION: Both ends 111 of a strip member 110 wound around the water wall tube 10 disposed on a furnace wall are held between an outer side inclined face 122 of a wedge like inner side holding/pressing member 120 and an inner side inclined face 134 of an outer side holding/pressing member 130 holding the inner side holding/pressing member 120 in a wedge shaped space part 135, and the inner side holding/pressing member 120 is drawn closer to a side of a fixing part 160 by a chain lock 151. Both ends 111 are held by frictional force of faces between the outer side incline face 122 and the inner side inclined face 134, and holding force is increased along with increase of drawing force. The fixing part 160 can be disposed in a tower member 200 positioned on the furnace wall. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a water wall pipe for use in repairing a specific water wall pipe of a boiler furnace wall in which a plurality of water wall pipes are erected in parallel, by partially pulling the water wall pipe into or out of the furnace wall. The present invention relates to a tube position moving device.

In general, some boilers used in thermal power plants have the following structure. FIG. 5 is a cross section showing a schematic structure of the boiler. The boiler 300 combusts the fuel ejected from the burner 302 in the combustion chamber 301, and is disposed between the lower (water) drum 303 and the upper (steam) drum 304 by heat generated by the combustion, and retains water therein. The water tube group 305 is heated to generate steam. The steam in the upper drum 304 is superheated by the superheater 307, becomes superheated steam, and is led to a generator or the like. Further, the exhaust gas after combustion is discharged from the exhaust gas passage 306. In the exhaust gas channel 306, air is heated by the air preheater 308 and introduced into the combustion chamber 301 as preheated air.
In such a boiler 300, the furnace wall 310 of the combustion chamber 301 is configured as a water-cooled wall in which a water wall pipe (water-cooled wall pipe) 311 is arranged in parallel. Cooling water is introduced due to the decrease. In general, for a water-cooled wall, a strip-shaped steel plate is inserted between the water wall pipe and the water wall pipe is welded to both water wall pipes, and the membrane wall made into one panel and the pipe and the pipe are connected with no gap or a small gap. There is a tangent tube wall arranged side by side. Here, Patent Document 1 describes the water wall pipe.

And when a failure occurs in the above-mentioned water-cooled pipe, it is necessary to repair the water wall pipe, and this repair is generally performed in the following procedure. Here, the replacement of the water wall pipe does not replace the entire water wall pipe, but cuts and removes a part of the water wall pipe in which the failure has occurred, and replaces the removed water wall pipe with a replacement pipe. Weld and connect. FIG. 6 thru | or FIG. 9 is a schematic diagram which shows the repair procedure of the water cooling wall of a boiler, FIG. 6 (a) is a front view, (b) is an end elevation corresponding to the AA line in (a). In this example, the furnace wall 410 is a townsend wall, and a plurality of water wall tubes 411 to 422 are arranged in parallel with a small gap (for example, about 0.5 mm) in the vertical direction. The furnace wall 410 is provided with stay members 431 to 434 that connect the water wall pipes 411 to 422 with a predetermined interval in the horizontal direction.
In this example, when there is a problem in the local portion 430 sandwiched between the two stay members 432 and 433 in the vicinity of the center in the vertical direction of the water wall tube 417 among the plurality of water wall tubes 411 to 422. To do. At this time, since it takes time and labor to replace the entire target water wall pipe 417, as described above, the pipe portion 440 that covers the local portion 430 of the target water wall pipe 417 (the hatched line in FIG. 6). Replace only part).
For this reason, first, the stay members 432 and 433 corresponding to the upper and lower positions of the pipe portion 440 to be replaced are removed (see FIG. 7). The stay members 432 and 433 are removed over a portion connected to the water wall pipes 416 and 418 adjacent to the water wall pipe 417 to be replaced.

Next, as shown in FIG. 7, the water wall pipe 417 is cut at two locations, that is, at local portions 417 a and 417 b corresponding to the upper and lower portions of the pipe portion 440, and the pipe portion 440 is removed. The water wall pipe 417 is cut using an electric or pneumatic grinder, reciprocating saw, saver saw, or the like.
Then, a new water wall tube 450 (see FIG. 9) for replacement is connected to the cut portion. The new water wall tube 450 is welded to and connected to the old water wall tube 416, but this welding must be performed over the entire circumference of the joint between the new water wall tube 450 and the old water wall tube 417. However, if adjacent water wall pipes 416 and 418 are close to each other, the welding operation is disturbed. Therefore, the end portions 417a and 417b of the water wall pipe 417 are bent in one direction as shown in FIG. Make it protrude. Then, as shown by the solid line in FIG. 9, after attaching both ends of the new water wall tube 450 to the end portions 417 a and 417 b of the water wall tube 417, the replacement unit is installed as shown by the broken line in FIG. 9. The attached water wall pipe is deformed linearly as it was at the beginning, and new stay members 432 and 433 are attached to the removed portions and welded to the water wall pipes 416, 417 and 418. In repairing the water wall tube, the cutting of the replacement part, the position of the welding location, and the number of locations are appropriately changed according to the situation of the defective location. That is, when the defective part cannot be replaced well by cutting only the defective part, the adjacent water wall pipes 416 and 418 can be cut and a new pipe can be welded.
JP 2007-205603 A

In this way, since it is necessary to perform welding over the entire circumference of each individual pipe having a failure point in installing a new water wall pipe when repairing the water wall pipe, the water wall pipe is temporarily bent, Further, it is necessary to return the water wall pipe to a straight line after the welding is completed. At this time, it is necessary to apply a force to the water wall pipe to deform the water wall pipe. Conventionally, this water wall pipe is deformed as follows.
10A and 10B show a conventional method for deforming a water wall pipe, wherein FIG. 10A is a schematic diagram showing a method using a hydraulic jack, and FIG. 10B is a schematic diagram showing a method using a hammer. In this example, a force is applied to the water wall pipe from the inside of the furnace wall. That is, the hydraulic jack 530 is arranged between the in-furnace scaffold 520 and the water wall pipes 511 to 516 arranged inside the furnace wall 510, and the hydraulic jack 530 is brought into contact with the target water wall pipe 513, so that the hydraulic jack The water wall tube 513 is deformed by applying a force to the water wall tube 513 by actuating 530. Alternatively, as shown in FIG. 10B, the water wall pipe 513 is deformed by hitting the water wall pipe 513 with a hammer 532 via a pad 531 to the water wall pipe 513.

11A and 11B show another conventional method for deforming a water wall pipe, wherein FIG. 11A is a schematic diagram showing a method using a chain block and a wire rope, and FIG. 11B is a method using a chain block and a thin metal plate. (C) is a side surface schematic diagram from the B direction in (b). In this example, a force is applied to the water wall pipe from the outside of the furnace wall, and there is a certain gap t between the water wall pipe 513 and the adjacent water wall pipes 512, 514, and the water wall pipe 513 has a wire. It can be employed in a state where the rope 541 can be hung around. In this case, first, the wire rope 541 is wound around the water wall pipe 513 from the outside of the furnace wall 510 and the wire rope 541 is deformed by the chain block 542. The chain block 542 is connected to the fixed portion 543. And in the state where the dimension of the gap t between the water wall pipe 513 and the water wall pipes 512, 514 is reduced, as shown in FIGS. 11B and 11C, the water wall pipe 513 and the water wall pipe 512, A thin metal plate 551 is inserted into the gap t between the thin metal plate 514 and hung around the water wall pipe 513, and a hook of the chain block 542 is hooked on the hole 552 of the thin metal plate 551 and pulled.
However, in the method using the hydraulic jack 530 described above, the in-furnace scaffold 520 is not prepared on the assumption that a large force acts. Therefore, a large force cannot be applied to the water wall pipe 513, and the hammer 532 In the method of giving a blow, the water wall pipe is partially impacted, which may cause damage to the water wall pipe.

Further, in the method using the chain block, the stress concentrates on the hole 552 of the metal thin plate 551 used in a state where the space between the water wall tube 513 and the water wall tubes 512 and 514 is narrow, so that the metal thin plate 551 is damaged. There is a problem that it is easy to do and a large force cannot be applied to the water wall pipe. In addition, this method has a problem that the member to be hung on the water wall pipe 512 in the middle of the work has to be exchanged from the wire rope to the metal thin plate, and this exchange work takes time.
Therefore, the present invention provides a water wall that can move the position of the water wall pipe by applying a large force to the water wall pipe in a series of treatments even if the gap between the water wall pipe of the furnace wall and the adjacent water wall pipe is narrow. It is an object of the present invention to provide a tube position moving device for a tube.

In order to solve the above-mentioned problem, the invention of claim 1 is arranged between a boiler furnace wall composed of a plurality of water wall tubes arranged in parallel in the vertical direction and an attracting means for moving each water wall tube. A water wall pipe position moving device for moving a specific water wall pipe in one direction by the operation of the drawing means, comprising a thin metal plate, the intermediate part of which is hung around the specific water wall pipe A belt-like member having both ends projecting in a substantially orthogonal direction from the boiler furnace wall, and a connecting device that holds both ends of the belt-like member and is attracted by the attracting means. And
According to a second aspect of the present invention, the connecting device has a wedge shape having two outer inclined surfaces whose intervals gradually decrease toward the moving direction of the water wall tube, and is pulled toward the moving direction by the pulling means. There are two inner inclined surfaces that are arranged so that the interval gradually decreases toward the moving direction and clamps both end portions of the belt-like member between the outer inclined surfaces of the inner pressing member. And an outer pressing member that forms a wedge-shaped space in which the inner pressing member is disposed.
According to a third aspect of the present invention, the connecting device includes a positioning member that positions the inner pressing member so as to clamp both ends of the belt-shaped member between the outer inclined surface and the inner inclined surface. Features.
According to a fourth aspect of the present invention, the positioning member has one end joined to the inner pinching member, extends from the inner pinching member in the pull-out direction, and a connecting member to the drawing member is disposed at the other end. And a nut member that is screwed into the screw rod and contacts the outer pinching member to set the position of the inner pinching member in the wedge-shaped space. .

The invention according to claim 5 is characterized in that the outer pressing member includes two lateral members each having the inner inclined surface and a connecting member that couples the two lateral members.
The invention according to claim 6 is characterized in that the inner pressing member and the outer pressing member are made of metal.
The invention of claim 7 is characterized by comprising the attracting member.
According to an eighth aspect of the present invention, there is provided a base portion that contacts the boiler furnace wall, a fixed portion that is spaced apart from the base portion by a predetermined distance and to which the inner pressing member is connected via the drawing means. It is characterized by comprising a flange member comprising a connecting portion and a leg portion that connects the base portion and the connecting portion to maintain a constant distance between the connecting portion and the contact portion.
The invention of claim 9 is characterized in that the attraction member is a chain block.

According to the pipe position moving device of the water wall pipe according to claim 1, since the belt-like member is made of a metal thin plate, a gap between the water wall pipe and the water wall pipe adjacent to the predetermined water wall pipe is moved. Even if it is narrow, it can be easily hung around the water wall pipe, and the position of the water wall pipe can be moved by a series of operations. A large force can be applied to the water wall pipe without concentration.
According to the pipe position moving device for a water wall pipe according to claim 2, the both ends of the band-like member are an outer clamping surface provided with an outer inclined surface of a wedge-shaped inner clamping member and a wedge-shaped space in the coupling device. Since it is clamped and fixed between the inner inclined surfaces of the members, the attracting force of the attracting means becomes the clamping force, and the belt-like member is firmly fixed to the coupling device.
According to the pipe position moving device of the water wall pipe according to claim 3, since the connecting device is provided with the positioning member, the belt-like member is temporarily fixed between the inner pressing member and the outer pressing member. Therefore, when the pipe position is moved, the attachment operation of the belt-like member and the connecting device can be facilitated.
According to the pipe position moving device for a water wall pipe according to claim 4, since the positioning member includes the screw rod and the nut member screwed into the screw rod, the screwing position of the nut member in the screw rod is changed. Thus, the inner pinching member can be positioned easily.

According to the pipe position moving device of the water wall pipe according to claim 5, the outer pinching member of the connecting device is composed of the two horizontal members and the connecting member that connects the horizontal members, so the configuration is simple. Can be.
According to the pipe position moving device for a water wall pipe according to the sixth aspect, since the inner pressing member and the outer pressing member are made of metal, they can be excellent in durability.
According to the pipe position moving device for the water wall pipe according to the seventh aspect, since the drawing member is provided, the pipe position of the water wall pipe can be easily moved only by operating the drawing member.
According to the pipe position moving device of the water wall pipe according to claim 8, the base member and the connecting part that becomes the fixing part, and the flange member that connects the base part and the connecting part with a certain distance apart are provided. Therefore, the fixing part can be set at a position away from the furnace wall by a fixed distance without setting the fixing part, and the pipe position of the water wall pipe can be easily moved.
According to the pipe position moving device for a water wall pipe according to claim 9, since the attracting member is a chain block, the connecting device can be pulled by a manual operation and force can be applied to the water wall pipe. The pipe position of the wall pipe can be moved.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 shows a pipe position moving device for a water wall pipe according to an embodiment, FIG. 1 (a) is a plan view, and FIG. 1 (b) is a cross-sectional view corresponding to the line CC in FIG. (C) is sectional drawing equivalent to the DD line in (a), FIG. 2 is a top view which shows the decomposition | disassembly state of the pipe position moving apparatus of the water wall pipe shown in FIG. 1, FIG. 3 is pipe position movement. The use state of an apparatus is shown, (a) is a top view, (b) is a front view.
In this example, a pipe position moving device (hereinafter referred to as a pipe position moving device) 100 for a water wall pipe includes a tube row 1 constituting a boiler furnace wall and a fixed portion 160 (see FIG. 3) It is arranged between the attracting means 150 supported by 3), and the local part (required repair point) of the target water wall pipe 10 is deformed and fixed from the initial position by the attracting operation of the attracting means 150. It is a means to pull out to the part side. In this example, the attracting means 150 includes a chain block 151 as shown in FIG. 11, a first wire rope 152 for attaching the chain block 151 to the fixing portion 160, and a second wire rope 153 for attaching the chain block 151 to the connecting device 170. It consists of.
The tube position moving device 100 includes a belt-like member 110 made of, for example, stainless steel, and a connecting device 170 that sandwiches and fixes both end portions 111 of the belt-like member 110 in a surface contact state.
The band-shaped member 110 is formed of a thin plate having a thickness smaller than a gap dimension (0.5 mm) between adjacent water wall tubes, for example, a thickness of 0.4 mm, and an intermediate portion 112 positioned between both end portions 111 is positioned. It is hung around the outer periphery of the water wall tube 10 to be moved, and both end portions 111 are arranged so as to protrude from the water wall tube 10 in a substantially orthogonal direction. The width of the belt-like member 110 is sufficient to withstand the force to be applied to the water wall tube 10, and the length of the belt-like member 110 is hung around the water wall tube 10 so that both end portions 111 are sandwiched inside. The pressure member 120 is long enough to be held.

The connecting device 170 includes a wedge-shaped inner pressing member 120, an outer pressing member 130 that houses the inner pressing member 120, and a positioning member that holds the inner pressing member 120 at a predetermined position in the outer pressing member 130. 140. Further, the positioning member 140 connects the inner clamping member 120 and the second wire rope 153 of the attracting means 150. The inner clamping member 120, the outer clamping member 130, and the positioning member 140 are made of steel.
The inner pressing member 120 includes a wedge-shaped (tapered) main body 121, and the main body 121 is arranged so that the interval gradually decreases in a tapered shape toward the fixing portion 160 (moving direction of the water wall tube). Two outer inclined surfaces 122, 122 are formed. In addition, a positioning member 140 is attached to the end of the inner clamping member 120 on the fixed part 160 side (the movement direction side of the water wall pipe).
The outer clamping member 130 includes two lateral members 131 and 131 that sandwich the inner clamping member 120, first coupling members 132 and 132 that couple the upper and lower sides of the lateral member 131 on the water wall tube 10 side, and a fixing portion 160. On the side, end portions of the two transverse members 121 are joined, and a second connecting member 133 having a through hole 136 is provided. The inner surfaces of the horizontal members 131 and 131 have an inclination angle parallel to the outer inclined surfaces 122 and 122 of the inner clamping member 120, and the interval is tapered toward the fixed portion 160 side (movement direction of the water wall pipe). The inner inclined surfaces 134 and 134 that gradually decrease are formed, and a wedge-shaped space 135 in which the inner pressing member 120 is movably disposed is formed between the inner inclined surfaces 134 and 134. The wedge-shaped space 135 is shielded by the second connecting member 133 on the fixed portion 160 side, and on the water wall tube 10 side, the lateral members 131 and 131 and the first connecting members 132 and 132 The inner pinching member 120 can be taken in and out of the water pipe through the opening.
Then, the inner pressing member 120 is disposed in the wedge-shaped space 135 of the outer pressing member 130, and both end portions 111 of the band-shaped member 110 are connected to the outer inclined surfaces 122 and 122 of the inner pressing member 120 and the outer pressing member. The inner inclined surfaces 134 and 134 can be clamped by pressing.

The positioning member 140 includes a screw rod 141 welded and fixed to the inner clamping member 120, a connecting portion 142 that is disposed on the fixing portion 160 side of the screw rod 141 and connected to the first wire rope 152, and is screwed to the screw rod 141. A nut portion 144 and a washer 145 are provided. A connecting hole 143 for connecting the second wire rope 153 is opened in the connecting portion 142.
The screw rod 141 is loosely fitted in the through hole 136 of the second connecting member 133, and the nut portion 144 is in contact with the outer surface of the second connecting member 133 via the washer 145. Therefore, by screwing the nut portion 144, the axial position of the inner pressing member 120 in the wedge-shaped space portion 135 is adjusted, and the band-shaped member is provided between the outer inclined surfaces 122 and 122 and the inner inclined surfaces 134 and 134. The inner pressing member 120 can be positioned in the wedge-shaped space 135 with the both ends 111 of the 110 being fixed temporarily.
In this example, the screw rod 141 is joined to the inner clamping member 120 and is pulled by the chain block 151 via the second wire rope 153 at the connecting portion 142. For this reason, the inner clamping member 120 is attracted to the fixed portion 160 side by the attracting means 150 in a state where both end portions 111 of the band-shaped member 110 are sandwiched between the outer inclined surfaces 122 and 122 and the inner inclined surfaces 134 and 134. The both end portions 111 of the belt-shaped member 110 are firmly held in a state of surface contact by the wedge action between the outer inclined surfaces 122, 122 and the inner inclined surfaces 134, 134, and the belt-shaped member 110 is fixed to the fixed portion 160 side. Attracted.

Next, a method of using the tube position moving device 100 will be described with reference to FIG. In this example, when the water wall tube 10 that has been removed from the tube row 1 of the water wall tube forming the furnace wall is corrected to be aligned with the tube row 1, that is, the repaired water wall tube is returned to its original position. The case where they are aligned with each other will be described. Note that the same method as this procedure can be applied to a case where a specific water wall pipe is bent from a row of water wall pipes arranged in reverse to this example so that welding can be performed.
First, the band-shaped member 110, the connecting device 170, and the attracting means 150 are installed between the water wall tube 10 and the fixing portion 160. Then, the fixing portion 160 and the chain block 151 are connected by the first wire rope 152, and the connecting portion 142 of the positioning member 140 and the chain block 151 are connected by the second wire rope 153. In addition, as the fixing | fixed part 160, although the existing in-furnace scaffold and others can be used, it is suitable to use the eaves member 200 mentioned later.

Next, an intermediate portion of the belt-shaped member 110 is hung around the water wall tube 10, and both end portions 111 of the belt-shaped member 110 are extended in a direction orthogonal to the water wall tube 10. Since the belt-like member 110 is formed of a thin metal plate, it can be easily inserted into a narrow gap between adjacent water wall tubes. Then, both end portions 111 of the belt-shaped member 110 are inserted between the inner pressing member 120 and the outer pressing member 130 of the coupling device 170 and sandwiched between the outer inclined surfaces 122 and 122 and the inner inclined surfaces 134 and 134. Next, the nut portion 144 of the positioning member 140 is screwed into the screw rod 141, the inner clamping member 120 is moved to the maximum in the direction of the fixed portion 160 in the wedge-shaped space 135, and both end portions 111 are connected to the outer inclined surfaces 122 and 122 on the inner side. It latches between the inclined surfaces 134,134.
Then, by driving the chain block 151 in this state, the connecting device 170 is pulled in the direction of the fixed portion 160, a force is applied to the water wall tube 10 around which the belt-shaped member 110 is hung, and a specific portion of the water wall tube 10 is moved. Deform and align with tube row 1. At this time, both end portions 111 of the belt-like member 110 are firmly held in a state of surface contact by the wedge action between the outer inclined surfaces 122, 122 and the inner inclined surfaces 134, 134, and the belt-like member 110 is fixed to the fixing portion 160 side. Attracted to At this time, as the pulling force by the pulling means 150 increases, the holding force of the both end portions 111 also increases, and the both end portions 111 do not come off the connecting device 170.
Then, when the water wall pipe 10 moves to a predetermined position, the chain block 151 is reversed, and then the nut portion 144 of the positioning member 140 is loosened, and the inner clamping member 120 is moved in the wedge-shaped space portion 135, and both end portions are 111 is removed.
As described above, according to the pipe position moving device 100 according to the present example, when the water wall pipe 10 is deformed, the belt-like member 110 can be inserted into the narrow gap between the water wall pipe 10 and the adjacent water wall pipe. In addition, since it can be held with a frictional force that increases as the force pulling the both ends 111 of the band-shaped member 110 increases, the band-shaped member 110 does not come off or breaks easily and reliably. A large force can be applied to the tube.

Next, another embodiment of the pipe wall position moving device according to the present invention will be described. This example is provided with a gutter member 200 that can easily set a fixed portion on which the above-described tube position moving device 100 is installed.
FIG. 4 is a schematic view showing a pipe position moving device for a water wall pipe according to a second embodiment. In this example, the pipe position moving device 100 is installed on the flange member 200. The eaves member 200 is fixed to the base 210 that contacts the tube array 1 of the water wall tube that forms the furnace wall, and is spaced apart from the base 210 by a predetermined distance and to which the inner pressing member is connected via the attracting means. A connecting part 220 as a part, and four leg parts 230 that connect the base part 210 and the connecting part 220 to keep the distance between the base part 210 and the connecting part 220 constant. The eaves member 200 is made of, for example, a steel channel member.
The base 210 includes rod-shaped contact portions 211 and 211 that are arranged in parallel with the water wall pipe in a state of being installed on the furnace wall, and beam members 212 and 212 that are arranged so as to form a cross with the contact portions 211 and 211. Consists of. Further, four leg portions 230 and 230 are arranged at four corners of the base portion 210 and support the connecting portion 220 with a predetermined dimension from the base portion 210. The connecting part 220 includes a ceiling member 221 connected to the leg parts 230, 230, and an attachment member 223 that is disposed on the water wall pipe 10 side of the ceiling member 221 and to which the first wire rope 152 of the drawing means 150 is attached. And a mounting plate portion 222.

In order to use such a saddle member 200, as shown in FIG. 4, the base 210 is placed in contact with the furnace wall, and the first wire rope 152 of the attracting means 150 is attached to the connecting part 220 which is a fixed part. In addition, a chain block 151, a second wire rope 153, and a connecting device 170 are arranged. In this state, similarly to the first example described above, the band-shaped member 110 is wound around the water wall pipe 10 and both end portions 111 of the band-shaped member 110 are arranged between the inner pressing member 120 and the outer pressing member 130. The chain block 151 may be driven after the inner clamping member 120 is positioned.
According to this example, it is possible to install the fixing portion only by installing the flange member 200 without arranging any other fixing portion.

BRIEF DESCRIPTION OF THE DRAWINGS It shows the pipe position moving apparatus of the water wall pipe which concerns on the embodiment, (a) is a top view, (b) is sectional drawing equivalent to CC line in (a), (c) is It is sectional drawing equivalent to the DD line in (a). It is a top view which shows the decomposition | disassembly state of the pipe position moving apparatus of the water wall pipe shown in FIG. The use state of a pipe position moving apparatus is shown, (a) is a top view, (b) is a front view. It is a schematic diagram which shows the pipe position moving apparatus of the water wall pipe | tube which concerns on the example of 2nd Embodiment. It is sectional drawing which shows schematic structure of a boiler. It is a schematic diagram which shows the repair procedure of the water cooling wall of a boiler, (a) is a top view, (b) is an end view equivalent to the AA line in (a). It is a schematic diagram which shows the repair procedure of the water cooling wall of a boiler, (a) is a top view, (b) is an end view equivalent to the AA line in (a). It is a schematic diagram which shows the repair procedure of the water cooling wall of a boiler, (a) is a top view, (b) is an end view equivalent to the AA line in (a). It is a schematic diagram which shows the repair procedure of the water cooling wall of a boiler, (a) is a top view, (b) is an end view equivalent to the AA line in (a). 10A and 10B show a conventional method for deforming a water wall pipe, wherein FIG. 10A is a schematic diagram showing a method using a hydraulic jack, and FIG. 10B is a schematic diagram showing a method using a hammer. It shows another conventional method for deforming a water wall pipe, (a) is a schematic diagram showing a method using a chain block and a wire rope, (b) is a schematic diagram showing a method using a chain block and a metal thin plate. FIG. 2C is a schematic side view from the B direction in FIG.

Explanation of symbols

  1 tube row, 10 water wall tube, 100 tube position moving device, 110 strip member, 111 both ends, 112 intermediate portion, 120 inner pressing member, 122 outer inclined surface, 130 outer pressing member, 131 lateral member, 132 first 1 connection member, 133 second connection member, 134 inner inclined surface, 135 wedge-shaped space, 136 through hole, 140 positioning member, 141 screw rod, 142 connection portion, 143 connection hole, 144 nut portion, 145 washer, 150 Means, 151 Chain block, 152 First wire rope, 153 Second wire rope, 160 Fixing part, 170 Connecting device, 200 Anchor member, 210 Base part, 211 Contact part, 212 Beam member, 220 Connection part, 221 Ceiling member, 222 Mounting plate, 223 Mounting member, 230 Leg

Claims (9)

It is arranged between the boiler furnace wall composed of a plurality of water wall tubes arranged in parallel in the vertical direction and the attracting means for deforming and moving a part of each water wall tube, and specified by the operation of the attracting means A water wall pipe position moving device for locally moving the water wall pipe in one direction,
A belt-shaped member made of a thin metal plate, whose intermediate portion is hung around the specific water wall pipe, and whose both end portions project in a substantially orthogonal direction from the boiler furnace wall,
A coupling device that holds the both ends of the belt-like member under pressure and is attracted by the attracting means;
An apparatus for moving the pipe position of a water wall pipe. The connecting device is
An inner pinching member that has a wedge shape with two outer inclined surfaces whose intervals gradually decrease in the moving direction of the water wall tube, and is drawn in the moving direction by the pulling means;
The inner pressing member includes two inner inclined surfaces that are arranged so as to be gradually reduced in the moving direction and press the both end portions of the belt-shaped member between the outer inclined surfaces of the inner pressing member. An outer pinching member that forms a wedge-shaped space in which is disposed,
The pipe position moving device for a water wall pipe according to claim 1. The connecting device is
3. The water wall pipe according to claim 2, further comprising a positioning member that positions the inner clamping member so as to clamp both ends of the belt-shaped member between the outer inclined surface and the inner inclined surface. Tube position moving device. The positioning member is
A screw rod having one end joined to the inner pinching member and extending from the inner pinching member in the pull-out direction and having a connecting member with the attraction member disposed at the other end;
A nut member that is screwed into the screw rod and contacts the outer clamping member to set the position of the inner clamping member in the wedge-shaped space,
The pipe position moving device for a water wall pipe according to claim 3. The outer pinching member is
Two transverse members with each inner inclined surface;
A connecting member for connecting the two transverse members;
The pipe position moving device for a water wall pipe according to any one of claims 1 to 4, further comprising:   6. The pipe position moving device for a water wall pipe according to claim 1, wherein the inner pressing member and the outer pressing member are made of metal.   The apparatus for moving the pipe position of a water wall pipe according to any one of claims 1 to 6, further comprising the attracting member. A base in contact with the boiler furnace wall;
A connecting portion as a fixing portion, which is arranged apart from the base portion by a predetermined distance, and to which the inner clamping member is coupled via the drawing means;
A leg portion that connects the base portion and the connection portion to maintain a constant distance between the connection portion and the contact portion;
8. A pipe position moving device for a water wall pipe according to claim 7, further comprising:   The pipe position moving device for a water wall pipe according to any one of claims 1 to 8, wherein the attraction member is a chain block.

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