JP3086558B2 - Automatic torus ring cutting device for turbine high pressure feed water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting formed around a water chamber lid fitted to the open lower end of a cylindrical water chamber of a high pressure feed water heater (bleach lock head type) of a thermal power plant. A torus ring with a substantially C-shaped cross section welded by straddling between the water chamber and the water chamber lid to seal the gap with pressure
Each time the heater inside is inspected or repaired, simply remove the water chamber lid using a cutter in the circumferential direction to remove the water chamber lid, and the V-cut groove (groove shape) required for re-welding the cut location The present invention relates to an apparatus for automatically cutting a torus ring of a turbine high-pressure feed water heater which can be formed in a torsion ring.

[0002]

2. Description of the Related Art FIGS. A water chamber cover 102 is fitted to the open lower end of the cylindrical water chamber 101 of the high-pressure feed water heater 100 shown in FIG. As shown in FIG. 2, a torus ring 200 having a shape in which steel pipes having a cut so as to have a substantially C-shaped cross section are connected in a ring shape is straddled over a gap g between the water chamber 101 and the water chamber lid 102. Let it be welded. Then, in order to cut the torus ring 200 as described above, the turning shaft 302 of the revolving arm 301 is attached to the water chamber cover 102 using the screw hole 102a provided in the center of the lower surface of the water chamber lid 102.
The gas torch 303 attached to the tip was manually operated to cut the torus ring 200. In this case, as shown in the enlarged view of FIG. 14, the cut portion m has a relatively wide slit shape with a rough cut surface. It was necessary to apply grinding or the like to a V-cut groove (indicated by the symbol n in the figure) in a manner to straddle both sides of the point m.

[0003]

The above-mentioned cutting operation and the shaping operation of the cut portion require a fairly skilled technique and a lot of time. Of course, due to the installation of the high-pressure feed water heater, this cutting work is a work in a narrow place, and especially the shaping and processing work of the cut surface on the water chamber side is performed with an unreasonable posture such as bending upward As a result, young people have been shunned and won, and there are concerns about securing workers in the future. Therefore, an object of the present invention is to automatically perform the cutting operation of the torus ring with almost no human intervention, and, of course, the post-processing operation of shaping the cut portion into a V-cut groove for re-welding requires a light repair. It is an object of the present invention to provide a torus ring automatic cutting device for a turbine high-pressure feed water heater which requires only a small amount.

[0004]

According to the present invention, there is provided an automatic torus ring cutting apparatus for a turbine high pressure feed water heater according to the present invention, which is fitted to an open lower end of a cylindrical water chamber constituting the heater. In order to seal the fitting gap of the water chamber cover 102 with pressure resistance, the cross section welded across this gap is substantially C
The V-shaped torus ring 200 can be cut into a V-cut groove when it is cut in the circumferential direction to remove the water chamber lid every time the heater is inspected or repaired. A mounting portion 2 detachably attached to a spindle 1 protruding from the center of the lower surface side of the water chamber lid 102 so that re-welding can be efficiently performed after the chamber lid is mounted. A rotating arm 4 attached to the mounting portion 2 and rotated horizontally around the support shaft 1 by a rotating means 3, and attached to the rotating arm 4 to face the torus ring 200. Movable pedestal 5 that can be moved back and forth,
A cutting torch 6 attached so that it can be finely adjusted in the vertical and longitudinal directions and tiltable in the vertical direction, and a tip of the cutting torch 6 rotated together with the rotary arm 4 and a cutting location of the torus ring 200 and a fixed position holding means 7 for holding the positional relationship with a in a predetermined state.
The fixed position holding means 7 includes the front and rear movable pedestal 5.
A front / rear copying member 25 attached to the upper / lower adjustment plate 30 and first pressing means 26 for pressing the member against the peripheral side surface (front / rear reference surface) of the torus ring 200; The vertical copying member 35 attached to the movable plate 28 and the lower surface of the water chamber 101 (upper and lower reference surfaces).
And a second pressing means 36 for pressing against the second member. Further, a horizontal position adjusting means 13 for rotating the rotating arm 4 in the horizontal direction may be attached to the mounting portion 2.

[0005]

To remove the water chamber lid during inspection and repair of the inside of the heater, the torus ring 200 is provided in the center of the lower surface of the water chamber lid to cut the torus ring into a V-cut groove along the circumferential direction. The support shaft 1 is attached to the shaft hole, and the mounting portion 2 is vertically detachably attached to the support shaft 1. The front and rear movable pedestal 5 is attached to the rotating arm 4 provided on the mounting portion 2 so as to be movable back and forth.
The cutting torch 6 attached vertically and vertically movable and vertically tiltable via the vertically movable plate 28 assembled vertically so that the cutting direction is horizontal. After being worn, the cutting torch 6 and the rotating means 3 of the rotary arm 4 are operated to first cut the torus ring 200 horizontally over its entire circumference. Next, the cutting torch 6
Is attached to the front and rear movable pedestal 5 so that the cutting direction is obliquely upward and a V-cut groove is formed between the horizontal cutting portion and the oblique cutting portion. Is cut all around. During the rotation of the rotary arm 4, the front / rear copying member 25 is pressed against the peripheral side surface of the torus ring 200 by the first pressing means 26,
Further, by continuously pressing the upper / lower copying member 35 against the bottom surface of the water chamber cover 102 by the second pressing means 36, even when the torus ring 200 is not a perfect circle, for example,
The tip of the cutting torch 6 rotated together with the cutting position of the torus ring 200 is always kept in a predetermined positional relationship.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The high pressure feed water heater 100 is shown in FIG.
A water chamber cover 102 is fitted to the open lower end of the cylindrical water chamber 101 as shown in FIGS. The two mating surfaces facing each other are formed in an internal toothed wheel shape and an external toothed wheel shape, respectively, and as shown in FIG. I have. A screw hole 102 a is provided in the center of the lower surface of the water chamber cover 102. The size of the torus ring 200 having the form in which the metal pipe is bent into a ring shape is as follows.
mm, pipe diameter is about 51mm, pipe wall thickness is about 5.5m
m.

As shown in FIG. 1, an automatic cutting machine A, which is a main body of an automatic torus ring cutting device, includes a spindle 1 connected to a lower side of a stud bolt 103 screwed into a screw hole 102a.
Is detachably mounted. A general configuration of the automatic cutting machine A will be described. Reference numeral 2 denotes a mounting portion which is connected to a pin below the support shaft 1 and has a lower end which is horizontally rotated at a predetermined speed by a variable speed motor 3. The rotating arm 4 is assembled. A cutting torch 6 of an air plasma cutting machine can be fine-adjusted vertically and longitudinally on a movable pedestal 5 attached to the rotating arm 4 so as to be movable forward and rearward (left and right in FIG. 1) and vertically. It is attached so that it can tilt. Further, the front and rear movable pedestal 5 is provided with a fixed position holding means 7 (described later) for always causing the tip of the cutting torch 6 rotated together with the rotary arm 4 to face the cut portion of the torus ring 200 at a predetermined interval. doing.

Next, the detailed configuration of the automatic cutting machine A will be sequentially described. A cap nut 104 for connecting the support shaft 1 to a lower end of a stud bolt 103 is attached to an upper end of the support shaft 1 having a pin hole 1a provided laterally in the middle of the axial direction. 10
Reference numeral 5 denotes a connecting pin inserted into the pin hole 1a.

The mounting portion 2 has a disk 11 fixed to the bottom end of a vertically oriented boss 10, and three arm members 12 extending obliquely upward and extending outward at equal intervals on the upper surface of the disk 11. It has a standing configuration. On the upper end side of the boss 10, a shaft hole 10a into which the lower end of the support shaft 1 is inserted is provided. At the upper end of each arm member 12, as a horizontal position adjusting means for correctly fixing the disk 11 in a horizontal direction, a leveling bolt 13 is provided.
Are screwed vertically, and the upper ends thereof are pressed against the lower surface of the water chamber cover 102.

A ring gear 16 is fitted on the outer peripheral surface of the disk 11 via a cross roller bearing 15.
Reference numeral 17 denotes a pinion meshed with the ring gear 16, and the shaft of the pinion 17 is connected to a reduction gear 18 and an electromagnetic clutch 19.
Is connected to the rotating shaft of the variable speed motor 3 via the. The electromagnetic clutch 19 is used to adjust the torus ring 20 when adjusting the device.
In order to facilitate the adjustment of the positional relationship of the cutting torch 6 with respect to 0, the rotary arm 4 plays a role of enabling easy manual rotation. A proximity switch 21 is attached to the gear cover 20 that covers the variable speed motor 3 and the pinion gear 16 to count the number of teeth of the ring gear 16 so that the rotation position of the rotary arm 4 can be detected.

The rotating arm 4 includes a mounting portion 4A fixed to the bottom surface of the ring gear 16, an upright portion 4B having one end of the mounting portion 4A projecting outward from the ring gear 16 and connected upwardly to an end thereof. And a rail portion 4C extending horizontally outward from the upper end of the rising portion 4B. The front and rear movable pedestal 5
It is slidably attached along a guide rail 22 provided horizontally on the side surface of the rail portion 4C.

As shown in FIG. 3, a slider 23 to be loosely fitted on the guide rail 22 is attached to the back of the front and rear movable pedestal 5 having a rectangular thick plate shape. As shown in FIGS. 1, 2, and 6, a bracket 24 is attached to an upper and lower adjustment plate 30 attached to the front and rear movable base 5 via a vertical movable plate 28. The front-rear copy roller 25 serving as a copy member is vertically aligned with a roller shaft.
It is assembled so as to protrude upward. Here, before and after
In FIG. 1 showing the front of the automatic cutting machine A, the torus ring 200 means the front and rear with respect to the cutting position a (see FIG. 9) in the ring radial direction. As shown in FIG. 1, during the rotation of the rotary arm 4, the front / rear copying roller 25 is constantly pressed against the inner peripheral side surface of the torus ring 200 serving as the copying reference surface. One air cylinder 26 is attached to the rotating arm 4 in the horizontal direction, and its operating rod 26a is connected to the front and rear movable pedestal 5 via the bracket 27 (see the schematic diagrams of FIGS. 3 and 6). The front / rear copying roller 25 and the first air cylinder 26 are
It constitutes a part of the fixed position holding means 7 for keeping the tip of the cutting torch 6 at a predetermined position.

As shown in FIG. 3, a rectangular movable plate 28 is mounted on the front surface of the front and rear movable base 5. A rectangular vertical adjusting plate 30 is slidably contacted with the front surface of the vertical movable plate 28 so as to be vertically movable. In order to maintain this sliding contact state, as shown in FIGS.
Attachment bolts 31 respectively inserted into vertically long holes provided at locations
Are screwed to the vertically movable plate 28. Further, in order to prevent the vertical adjustment plate 30 from being laterally displaced, the vertically long fitting projection 32a and the fitting projection 32a are loosely fitted to the sliding contact surface between the upper and lower movable plate 28 and the upper and lower adjustment plate 30. A fitting groove 32b is provided.
Further, a vertical position adjusting screw (push-pull screw) 33 for finely adjusting the mounting position of the vertical adjusting plate 30 to the vertical movable plate 28 up and down.
Is mounted between the two plates. Also, as shown in FIG. 3, the upper and lower movable plates 28 and the upper and lower adjustment plates 30 are provided with a reference position mark and an upper and lower scale Y engraved with ± scales indicating up and down deviations from the reference position, respectively.

As shown in FIG. 3 and FIG. 4 as a schematic diagram, the upper and lower movable plate 28 is provided with an upper and lower copying roller 35 serving as an upper and lower copying member so that its roller shaft is directed in the ring radial direction of the torus ring 200. And protrudes above the vertical movable plate 28 via a bracket 38. In order to keep the upper and lower copying rollers 35 constantly pressed against the lower surface of the water chamber lid 102 serving as the copying reference surface during the rotation of the rotary arm 4, the second copying roller 35 is used.
A second air cylinder 36 as a pressing means is attached to the front-rear movable pedestal 5 via a bracket 37,
It is connected to the upper and lower movable plate 28 via an a bracket 38. The vertical copying roller 35 and the second air cylinder 36 also constitute a part of the fixed position holding means 7 at the tip of the cutting torch 6. Reference numeral 39 shown in FIG. 1 is an air supply joint.

A front-rear adjustment plate 40 having a rectangular shape is slid on the front surface of the upper and lower adjustment plate 30. In order to maintain this sliding contact state, as shown in FIG. 1 and FIG. 6 as a schematic diagram, mounting bolts 41 respectively inserted into horizontally long holes provided in two upper and lower portions of the front-rear adjustment plate 40 are vertically It is screwed to the adjustment plate 30. In order to prevent the front and rear adjustment plate 40 from moving up and down, a sliding contact surface between the upper and lower adjustment plate 30 and the front and rear adjustment plate 40 includes:
A fitting groove 42b for loosely fitting the horizontally long fitting protrusion 42a is provided. Further, a front / rear position adjusting screw (push / pull screw) 43 for finely adjusting the mounting position of the front / rear adjustment plate 40 to the vertical adjustment 30 in the front / rear direction is assembled between the two plates. Also, FIGS.
As shown in (1), the front / rear adjustment plate 40 and the upper / lower adjustment plate 30 are respectively provided with a reference position mark and a front / rear scale X engraved with ± scales indicating the deviation from the reference position.

As shown in FIG. 1 and FIG. 7 as a schematic diagram, a fan-shaped tilting plate 50 for attaching the cutting torch 6 to be vertically tiltable is assembled on the front surface of the front-rear adjusting plate 40 in a sliding state. I have. In order to maintain this sliding contact state, two mounting bolts 52 inserted through an arc-shaped slit 51 provided in the tilting plate 50 are screwed to the front-rear adjustment plate 40 at a predetermined interval. Further, a screw hole for screwing the mounting bracket 53 of the cutting torch 6 is provided on the upper part of the tilting plate 50. The insertion hole 54 of the set screw of the mounting bracket 53 is formed as an elongated hole along the axial direction of the cutting torch 6 so that the mounting position of the cutting torch 6 can be finely adjusted before and after. The front and rear adjustment plate 40 and the tilting plate 50 are provided with a reference position mark and a tilt scale Z, respectively.

FIG. 11 is a wiring and piping diagram showing the connection between the automatic cutting machine A, the control unit of the automatic cutting device, and the distribution board. Reference numeral 60 denotes a control unit, which is an arithmetic circuit having a function of inputting a numerical value of the ring diameter of the torus ring 200 and automatically setting the rotation speed of the rotary arm 4 to a value corresponding to the ring diameter, and an air circuit. Contains power supply devices for plasma welding machines. Reference numeral 61 denotes a portable operation box for operating the automatic cutting machine A, which includes an automatic operation switch of the apparatus, a manual operation switch, a cutting speed display section, a cutting speed adjusting knob, a forward / reverse switch of the rotary arm 4, a plasma generation / stop. A switch, an on / off switch for the electromagnetic clutch 16, an emergency stop switch, and the like are provided. 62 is a distribution board, 63a, 63b
Is a power supply cable, 64 is a power supply and control cable for the motor, 65a and 65b are primary side air supply hoses and air supply hoses for air cylinders, and 66 is a ground cable.

Next, the operation of the above configuration will be described. In order to attach the automatic cutting machine A to the lower side of the water chamber lid 102 and set it in a use state, first, screw the upper end of the stud bolt 103 into the screw hole 102a of the water chamber lid 102, and lower the lower end of the stud bolt 103. Then, the spindle 1 is connected with the cap nut 104, and the spindle 1 is protruded from the lower surface of the water chamber cover 102. Next, the automatic cutting machine A mounted on a simple lifter (not shown) with wheels is moved directly below the spindle 1, the automatic cutting machine A is lifted, and the spindle 1 is inserted into the shaft hole 10a at the upper end of the boss 10. In addition, each pin hole 1 of the support shaft 1 and the boss 10
The connecting pin 105 is inserted through the a and 10b, and the mounting portion 2 is supported by the support shaft 1 in a hanging state. Then, the cap nut 104 is rotated and tightened so that the three leveling bolts 13 previously adjusted to the same length are in contact with the lower surface of the water chamber cover 102, and the leveling of the disk 11 is performed. Attachment of the automatic cutting machine A to the water chamber cover 102 is completed.

The cut portion a of the torus ring 200 is formed in a V-cut groove b as shown in FIG. 9 in preparation for re-welding after the inspection and repair of the high-pressure feed water heater 100 as described above. There is a need to. As shown in FIG. 9, the fusing portion c has a very narrow slit shape (for example, about 1.
By using the characteristics of the air plasma torch that can be cut to a width of 5 mm (width 5 mm), two cutting operations of horizontal cutting and oblique cutting may be performed.

First, the cutting torch 6 is set to a state where horizontal cutting can be performed. For that, the electromagnetic clutch 19
And the rotating arm 4 is brought to the cutting start position of the torus ring 200, and the tilting plate 50 is rotated while observing the inclination scale Z so that the axial direction of the cutting torch 6 is horizontal, and the horizontal cutting is performed. Set to position. At this time, the first,
By operating the second air cylinders 26 and 36, the front and rear and upper and lower copying rollers 25 and 35 are pressed against the inner peripheral surface of the torus ring 200 and the lower surface of the water chamber cover 102, respectively. In this state, the vertical adjusting plate 30 is moved up and down by the vertical position adjusting screw 33 so that the zero scale position of the vertical scale Y matches the reference position mark. Further, the scale position of the front and rear scale X is matched with the reference position mark by the front and rear position adjusting screw 43.
When the vertical relative position of the torus ring 200 with respect to the lower surface of the water chamber 101 is deviated from the reference, the correction for the deviation is performed by correcting the vertical graduation Y and the front and rear graduation X from the zero graduation position. This is performed by aligning the scale position with the reference position mark at the shifted scale position.

After that, the cutting torch 6 is set so that its axial direction is horizontal, and the tip of the cutting torch 6 is connected to the torus ring 2.
Attachment to the mounting bracket 53 is performed while adjusting the distance from the cutting surface to a predetermined distance, for example, 1 mm. Then, if a cutting start auxiliary hole is provided at the cutting start position of the torus ring 200, preparation for starting the first cutting step for cutting horizontally is completed.

Then, plasma is generated in the cutting torch 6 by the operation box 61 at hand, and the automatic operation button is pressed to start the variable speed motor 3. Along with this, the rotating arm 4 is rotated at a predetermined speed, and the cutting position of the torus ring 200 is first automatically cut in a horizontal direction. When the rotation arm 4 completes one rotation, the variable speed motor 3 stops, and the plasma of the cutting torch 6 disappears. Then, in accordance with the progress of the cutting, the operation box 61 can be used to freely switch from automatic operation to manual operation, finely adjust the cutting speed, retreat the cutting torch 6, and perform an emergency stop.

Next, the process proceeds to a second cutting step of cutting obliquely upward. To do this, the tilting plate 50 is rotated 60 degrees so that the axial direction of the cutting torch 6 is inclined 60 degrees upward. Fix in this position. Then, similarly to the first cutting step, the entire circumference of the torus ring 200 may be cut. In this manner, a beautiful V-cut groove b can be formed in the torus ring 200 without any effort by an unskilled person. And to get this cut surface in the best condition for welding, it is sufficient to perform only a slight grinding or buffing. The used automatic cutting machine A can be easily removed using the aforementioned simple lifter.

In the above configuration, the object of the present invention is achieved even if the detailed configuration is appropriately changed in design. For example, the configuration of the fixed position holding means 7 to be mounted on the front and rear movable pedestal 5 is different from the combination of the front and rear and upper and lower copying rollers 25 and 35 with the air cylinders 26 and 36, but merely a slidable projection and a spring. May be used in combination. The cutting torch 6 is not necessarily limited to an air plasma cutting machine.

[0025]

As is apparent from the above description, the automatic torus ring cutting device of the turbine high pressure feed water heater according to the present invention has various excellent effects as listed below. And the cost of ensuring subsequent welding is significantly reduced. (A) The cutting work of the torus ring by the cutting torch requires no manual operation except for the work of attaching and detaching the automatic cutting machine, and the tight operation of the cutting torch in an unreasonable posture that bends upward as in the conventional case. Freed from cutting work. (B) Therefore, it is possible to eliminate the possibility that it is difficult to perform accurate cutting due to work in an unreasonable posture. (C) Using a cutting torch in which the fusing point is extremely narrow like an air plasma cutting machine, cutting is performed in two steps so that the two cutting slits intersect in a V-shape. It can be formed in a beautiful V-cut groove. (D) Therefore, it is possible to almost eliminate the extremely troublesome and troublesome auxiliary work of shaping the extremely rough fusing portion by the conventional gas torch into a V-cut groove for welding after inspection and repair of the heater. (E) Therefore, even an unskilled person can easily and reliably perform the cutting operation of the torus ring, which conventionally required skill.

[Brief description of the drawings]

FIG. 1 is a front view of an automatic cutting machine, showing one embodiment of the present invention.

FIG. 2 is a bottom view of the automatic cutting machine.

FIG. 3 is a right side view of the automatic cutting machine.

FIG. 4 is a schematic explanatory view showing the configuration and operation of the upper and lower copying rollers.

FIG. 5 is an explanatory view of a mechanism for finely adjusting the vertical position of an upper and lower adjustment plate.

FIG. 6 is a schematic explanatory view showing the configuration and operation of the front and rear adjustment plates.

FIG. 7 is a schematic explanatory view showing the configuration and operation of the tilting plate.

FIG. 8 is a partial longitudinal sectional view showing a high-pressure feedwater heater.

FIG. 9 is a partially enlarged view showing a cut portion of the torus ring.

FIG. 10 is a sectional view taken along the line AA in FIG. 8;

FIG. 11 is a wiring and piping system diagram showing a connection state between the automatic cutting machine, a control unit thereof, and a distribution board.

FIG. 12 is a perspective view showing a state in which a torus ring is cut in a conventional technique.

FIG. 13 is a partial side view showing the state of the cutting operation.

FIG. 14 is a partially enlarged longitudinal sectional view showing a cut state of the torus ring.

[Explanation of symbols]

 A automatic cutting machine 1 support shaft 1a pin hole 2 mounting part 3 variable speed motor (rotating means) 4 rotating arm 5 front and rear movable pedestal 6 cutting torch 7 fixed position holding means (25, 26, 35, 36) 10 boss 10a shaft Hole 10b Pin hole 11 Disk 12 Arm member 13 Leveling bolt (horizontal position adjusting means) 14, 24, 27, 34, 37, 38 Bracket 15 Cross roller bearing 16 Ring gear 17 Binion 18 Reduction gear 19 Electromagnetic clutch 20 Gear cover 21 Proximity switch 22 Guide rail 23 Slider 25 Front / back copying roller 26 First air cylinder (first pressing means) 26a, 36a Operating rod 28 Vertical movable plate 30 Vertical adjustment plate 31, 41, 52 Mounting bolt 32A, 42A Fitting ridge 23B, 24b Fitting groove 33 Vertical position adjusting screw 35 Vertical copying roller (vertical copying hand) Step) 36 second air cylinder (second pressing means) 39 air supply means 40 front and rear adjustment plate 43 front and rear position adjustment screw 50 tilting plate 51 arc-shaped slit 53 mounting bracket 54 insertion hole 60 control unit 61 operation box 62 distribution board 63a , 63b Power cable 64 Power supply and control cable 65a, 65b Air supply hose 66 Earth cable X Front and rear scale Y Vertical scale Z Gradient scale a Cutting point b V-cut groove 100 High-pressure water heater 101 Water chamber 102 Water chamber lid 102a Screw hole 103 Stud bolt 104 Cap nut 105 Connecting pin 200 Torus ring 301 Revolving arm 302 Revolving shaft 303 Gas torch g Gap m Fusing location n V cut groove

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-79468 (JP, A) JP-A-6-262589 (JP, A) Japanese Utility Model 63-19972 (JP, U) Japanese Utility Model 63 25139 (JP, U) JP 3-7470 (JP, B2) JP 1-50505 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23K 10/00 B23K 7 / 00 F22D 1/32

Claims (3)

(57) [Claims] 1. A cross section welded over a gap of a water chamber lid 102 fitted to the open lower end of a cylindrical water chamber 101 constituting a heater is formed so as to straddle the gap in order to withstand pressure sealing. C
The V-shaped torus ring 200 can be cut into a V-cut groove when it is cut in the circumferential direction to remove the water chamber cover every time the heater is inspected or repaired. A mounting portion 2 detachably mounted on a support shaft 1 protruding from the center of the lower surface side of the water chamber cover 102, and being attached to the mounting portion 2, A rotating arm 4 which is horizontally rotated around the support shaft 1 by a moving means 3;
A movable pedestal 5 that can move back and forth toward 00, and a vertically adjustable movable plate 28 that can be moved up and down on the movable pedestal 5 so that the pedestal 5 can be finely adjusted vertically and forward and backward and tiltable vertically. The attached cutting torch 6 and fixed position holding means 7 for holding the positional relationship between the tip of the cutting torch 6 rotated together with the rotary arm 4 and the cutting position a of the torus ring 200 in a predetermined state. An automatic torus ring cutting and connecting device for a turbine high-pressure feed water heater. 2. The fixed position holding means 7 includes: a front / rear copying member 25 attached to the front / rear movable pedestal 5; and a first contact member for pressing the member against a peripheral side surface of the torus ring 200 (front and rear reference surface). The pressing means 26, the vertical copying member 35 attached to the front and rear movable pedestal 5, and the second pressing means 3 for pressing the member against the lower surface of the water chamber 101 (upper and lower reference surfaces).
6. The automatic torus ring cutting device for a turbine high-pressure feed water heater according to claim 1. 3. A high-pressure turbine feed water heater according to claim 1, wherein a horizontal position adjusting means for rotating the rotary arm in a horizontal direction is attached to the mounting portion. Automatic torus ring cutting device.