JPH0866867A - Automatic honing device and method for controlling same - Google Patents

Abstract

PURPOSE: To enhance the honing efficiency of an automatic honing device used for honing a heavy object where a number of small spaces exist, such as a rotor or diaphragm for a steam turbine. CONSTITUTION: When an abrasive obtained by the mixing of pulverized material in a fluid such as air is sprayed to a subject to be honed, e.g. the stationary blade of a diaphragm for a steam turbine, from the nozzle of an injection nozzle device 50 mounted on the arm of an automated honing device, to hone any material clinging to the stationary blade such as rust, the injection nozzle 50 is moved in the longitudinal direction of the stationary blade. The stationary blade has stepped levels at connections between an inner ring part 1a, an outer ring part 1b and a diaphragm nozzle blade part 1c, and the injection distances Y1 to Y3 between the injection nozzle 50 and the subject to be honed are adjusted to match the stepped levels.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention cleans the surface of a large-diameter, large-diameter rotating body such as a rotor for a steam turbine or a large circular circular plate-shaped component such as a diaphragm for a steam turbine by spraying a polishing agent. Automatic honing device,
The present invention relates to an automatic honing device suitable for improving cleaning efficiency and a control method thereof.

[0002]

Rotors and diaphragms for steam turbines require periodic cleaning. However, since it is a heavy object, special blasting is required. For example, 1100
The steam turbine of the MW-class nuclear power plant has high pressure,
There are a total of 6 rotors for the low pressure turbine. This rotor weighs about 170 tons, the total number of paragraphs is about 70 stages,
The total number of moving blades planted in each paragraph is about 15,000. Further, the diaphragm is for guiding the steam flow to the multistage impeller installed in the rotor, and is a disk-shaped partition plate having a nozzle-shaped steam flow path. This disk-shaped object is composed of two semi-circular objects, each of which is divided into two parts on the diametrical line, and is arranged between the impellers of the rotor.
This diaphragm has about 140 sheets in a 1100 MW class steam turbine, has a maximum diameter of about 5000 mm, and weighs about 8 tons per semicircular object.

At the time of regular inspection of the steam turbine (hereinafter referred to as "regular inspection"), the above-mentioned heavy object is disassembled into individual turbine constituent parts and cleaned, and the surface of the parts is visually inspected or nondestructive inspection for damage. Is supposed to do. For example, parts for nuclear turbines need to be decontaminated on surfaces to be inspected such as steam flow paths and steam passages that have been contaminated by steam flow and radioactivity during operation. For this reason, so-called honing work is performed in which a granular cleaning material is sprayed together with a high-speed fluid such as water or air to perform cleaning cleaning. In the case of a nuclear turbine, this honing work is a work in which protective clothing is worn in an isolation cleaning room (hereinafter referred to as the honing house) to prevent radioactive materials from scattering into the surrounding atmosphere. It is done manually by the staff.

FIG. 24 is an explanatory diagram of a manual honing operation for a turbine rotor. The rotor 100 is supported by the rotor pedestals 102a and 102b, and the honing house 105 is formed by the temporary scaffolds 103a, 103b, 104a, and 104b. Worker 106
The cleaning material supplied from the cleaning material supply device 107 through the blast hose 108 is sprayed on the surface to be cleaned of the rotor 100 by operating the injection nozzle 109 to clean the surface.

21 to 23 are explanatory views of the honing work of the diaphragm by manual work. As shown in FIG. 21, at the time of regular inspection, the diaphragm divided into two parts is hung from the turbine casing HP, ALP, etc., and as shown in FIG. 22, the diaphragm is provided so as to obtain the working space 4 on the fixed diaphragm pedestal 3. 1 is mounted. Then, at the time of honing work, as shown in FIG. 23, the worker 7 enters the honing house 6, and the honing work is carried out by manually spraying the abrasive with each diaphragm.

Such a manual honing work has a problem that the working environment is poor and severe, that the work requires a high degree of skill, and that the work requires a large number of personnel and a long period of time. Was high.
Therefore, the applicants of the present invention have filed Japanese Patent Application Laid-Open Nos. 63-150161, 2-167665, and 3-107.
The technology described in Japanese Patent No. 63 was first proposed, and the way for automation of honing work was opened.

[0007]

The automatic honing device previously proposed by the present applicants and the like has the advantage that the operator can be freed from a bad and harsh working environment and a great work period can be shortened. . However, due to the recent increase in power demand, it is necessary to shorten the time required for regular inspections in order to shorten the period for shutting down the power plant, and there is a desire to improve cleaning efficiency and finish honing work in a short time. .

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic honing device and a control method therefor, which can improve the work efficiency of the automatic honing work and can finish the work in a short time.

[0009]

The above-mentioned object is to insert the spraying material into the narrow space to be polished to be sprayed onto the surface of the polishing object while rotating the surface of the polishing object at a required angle while spraying the spraying agent in both left and right directions. It is achieved by

The above object is achieved by moving an injection nozzle, which sprays a polishing and cleaning material on the surface of the object to be polished while rotating it at a required angle, in accordance with the unevenness of the surface of the object to be polished.

[0011]

[Function] When the jet nozzle is inserted into a narrow gap such as between blade rows, and when the abrasive material is sprayed from the jet nozzle, it is sprayed from both the left and right directions. Becomes higher. Further, since the injection nozzle is moved along the surface of the uneven wing or the like in accordance with the unevenness,
The polishing material is not sprayed and there is no remaining portion, so that the cleaning efficiency is increased.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The requirements for the function and workability of the automatic honing device according to the embodiment of the present invention are as follows.

(1) Honing work can be performed continuously on a plurality of diaphragms arranged upright at arbitrary intervals. (2) For various upper half diaphragms and lower half diaphragms having different diameters, thicknesses, and cross-sectional shapes. On the other hand, it is possible to perform honing work with the same automatic honing device (3) Effective polishing is possible for the complicated curved shape of the nozzle blade part of the diaphragm (4) Polishing and cleaning both sides of the diaphragm Possible (5) Approximately 100 to 200 between turbine rotor impellers
Since the width of the nozzle is as narrow as about mm, and the opposite left and right polishing surfaces are flat surfaces of almost the same shape, the nozzle width and the connecting width are set so that the connecting rod provided with the injection nozzle can be inserted into this narrow gap. The width of the rod is small. (6) For efficiency of work, it is possible to spray the polishing material on both the left and right polishing surfaces at the same time so that the left and right honing operations can be performed simultaneously.

As means for satisfying these requirements, in order to meet the requirement (1), an arm structure which can operate in a gap between adjacent diaphragms and a structure in which the upper part of the diaphragm pedestal is self-propelled are used. In order to meet the requirement (2), the multi-joint connecting rod mechanism controls the bending angle of the joint portion of the connecting rod with respect to the change in diameter, and uses a self-propelled device for changing the thickness and cross-sectional shape. The injection distance can be adjusted by moving the main body and adjusting the position of the injection nozzle.

For the requirement (3), a nozzle rotating device for rotating the injection nozzle with an arbitrary angle is provided. Requirement (4)
For this, an injection nozzle reversing device is provided. Requirement (5)
For (6), it is possible to simultaneously rotate the injection nozzles in both left and right directions by using a bevel gear mechanism and to shorten the nozzle width.

In order to move the main body of the automatic honing device having the above-mentioned structure by itself, the traveling girder is installed on the traverse stand. Then, a connecting rod is attached to the main body that self-propels on this traverse stand, and between the adjacent surfaces to be cleaned, such as between adjacent diaphragms or between rotor blades, is rotated to correspond to the diameter of the surface to be cleaned. By changing the bending angle of the rod joint part and adjusting and controlling the equivalent connecting rod length (apparent length considering multiple connecting rods as one), along with the shape change of the surface to be polished,
The jet nozzle is caused to perform required operations such as rotation, movement, and inversion.

Since the shapes and dimensions of each diaphragm or rotor are uniquely determined in advance for each paragraph number, the interlocking of these respective operations is performed so that the polishing trajectories with the highest work efficiency can be obtained. The work procedure is programmed and given to the control device, and complete scouring and cleaning work is automatically and continuously performed over the entire required scouring and cleaning area of a plurality of scouring and cleaning surfaces having different sizes and shapes.

FIG. 1 is an overall external view of an automatic honing apparatus according to the first embodiment of the present invention applied to a diaphragm honing operation, and FIG. 2 is a view taken along the line AA of FIG. FIG. 3 is a perspective view for explaining a device configuration in the first embodiment of FIG. 1, and FIGS. 4 to 9 are device configuration and operation explanatory diagrams for more specifically explaining FIG. .

In the first embodiment, the main parts are a rail mount 10, a self-propelled device 20, an articulated joint rod device 30, an injection nozzle reversing device 40, an injection nozzle position adjusting device (hereinafter referred to as a nozzle moving device). .) 50, injection nozzle device 6
0, a horizontal gantry device 80, a horizontal gantry rail device 90, and a control device (not shown).

The polishing / cleaning material supplied together with the compressed air from the polishing / cleaning material supply device (not shown) passes through the flow path 62 from the blast hose 61 shown in FIG. 4 and is sprayed onto the diaphragm DF1 by the injection nozzle 64.

In the case of the first embodiment, there are the following two methods for spraying the polishing material on the surface to be polished. The first method is to use the motor 66 shown in FIG.
It is a method of spraying while jetting nozzle 64 is rotated via a and 65b (nozzle rotary polishing method: hereinafter referred to as rotary honing). The second method is motor 6
This is a method of spraying while keeping the injection nozzle in the desired direction without rotating 6 (hereinafter referred to as line honing).

In the case of the rotary honing which is the first polishing method, the polishing area by being sprayed from the injection nozzle 64 is an annular area having a center diameter DR (hereinafter referred to as a polishing circle) width DL. Therefore, in the case of line honing, which is the second scouring method, the scouring area is a circular area having a central diameter DL (hereinafter, referred to as a projection circle).

In the first embodiment, when performing the diaphragm honing operation, as shown in FIGS. 10 and 11, the first arm 31 and the second arm 3 which constitute the connecting rod device.
By performing simultaneous combined control of the rotational movements of No. 3, the honing work is performed with a linear or arc-shaped scanning locus adapted to the shape of the diaphragm.

In the case of the rotary honing which is the first grinding method described above, the grinding width HW of one grinding trace is the sum HW of the grinding circle DR and the projection circle DL along the trajectory of the jet nozzle.
= DR + DL), which is suitable for efficient cleaning of a relatively large area.

Further, in the case of the line honing which is the second blasting method, the blasting width HW of one blasting trajectory is a projection circle along the operation trajectory of the injection nozzle (HW-DL), and the area is relatively narrow. Alternatively, it is suitable for precise polishing of complicated shapes.

In this way, the polishing method can be arbitrarily selected so as to meet various conditions such as the shape of the portion to be polished, the required degree of polishing finish, and the polishing efficiency.

3 and 4, two connecting rods 31 and 33 for moving the injection nozzle along the surface to be polished of the diaphragm DF1 are connected to the self-propelled device 20, and the first joint thereof. The rotation of the portion is controlled by the motor 32, and the rotation of the second joint portion is controlled by the motor 34. By the combined control of the both, the cleaning operation is performed by a predetermined program.

In FIGS. 3 and 4, the diaphragm DF2
In the case of polishing and cleaning, it is necessary to direct the jetting direction of the nozzle to the direction opposite to that shown in the drawing, and the reversing motor 41 of the nozzle reversing device 40 rotates the entire nozzle section by 180 degrees.

The cross-sectional shape of the diaphragm is generally as shown in FIG. 6, and there is a step at the connecting portion between the inner ring portion 1a, the outer ring portion 1b, and the diaphragm nozzle vane portion 1c. When this step is too large, The cleaning effect may not be sufficient due to the spray distance of the cleaning material. Therefore, the automatic honing device of the present embodiment is provided with the configuration shown in FIG.
As shown in FIG. 6, the nozzle position adjusting device 50 is provided, and the parallel link mechanism is operated by the motor 51 to adjust the distance from the connecting rod axis to the nozzle tip while keeping the nozzle shaft at right angles to the connecting rod axis. I am able to do that.

In the case of FIG. 6, the outer ring portion 1b is cleaned in the state b, and the diaphragm nozzle blade portion 1c is moved to the right side as shown in the state c. By performing the blasting and cleaning, the distance Y2 is changed to the distance Y3 so as to be a distance approximately similar to the spraying distance Y1 so that the blasting and cleaning effect is not reduced.

FIG. 7 is a perspective view of the lower half diaphragm,
8 is a view taken along the line AA of FIG. 7, and FIG. 9 is a view taken along the line BB of FIG.
It is an arrow view. FIG. 8A and FIG. 9A show a state in which a line honing method in which the jet nozzle is not rotated is used to jet and polish from an effective arbitrary direction according to the curved surface of the diaphragm nozzle blade portion 1c. The figure (b) shows the polishing state by the line honing method for the inner ring 1a portion and the outer ring 1b portion, and the figure (c) shows the polishing state by the rotary honing method in which the injection nozzle is rotated.

At the time of regular inspection of the steam turbine, as shown in FIG. 21, the diaphragm 1 suspended from the turbine casing.
22 is placed upright in a predetermined cradle 3 as shown in FIG. 22, and prior to the start of honing work, as shown in FIGS. 10 and 11, the installation location of the automatic honing device according to the present embodiment. It is transported together with the diaphragm cradle. But,
As shown in FIG. 3, if an automatic honing device is present at the setting position of the diaphragm pedestal, it will hinder the setting of the diaphragm pedestal. Therefore, as shown in FIG. Distance S to the right of the position shown)
The traverse device 80 and the rail device 9 at the position retracted only
The automatic honing device is moved by 0 so that the lifting and lowering work for setting and replacing the diaphragm pedestal can be facilitated.

FIG. 12 is an operation state diagram of the first arm 31 and the second arm 33 of the connecting rod portion when honing the lower half diaphragm and FIG. 13 respectively. The range surrounded by the points A, B, C, D, E, F and A is the range to be cleaned.

Corresponding to points A to F, two connecting rods 31, 3
In No. 3, polishing is performed while sweeping the entire target range while changing to the state schematically shown by a thin line.

12, FIG. 13, FIG. 14, FIG. 15, and FIG.
FIG. 8 is a diagram showing an automatic honing device according to a second embodiment of the present invention applied to honing work of a turbine rotor. 12 is a front view applied to a turbine rotor, and FIG.
FIG. 14 is a view on arrow P of FIG. 12, and FIG. 14 is a view on arrow D-D of FIG. 13, showing a state in which the second arm 33R is inserted between the rotor blades. FIG. 15 is a sectional view taken along line CC of FIG.
It is a detailed explanatory view of an injection nozzle part. FIG. 16 is an enlarged view of the nozzle portion of FIG.

The first embodiment shown in FIGS. 1 and 6 and the second embodiment
The difference from the embodiment is that the second arm 33 at the tip of the connecting rod device 30 shown in FIG.
As shown in FIG. 15, the structure of the injection nozzle is devised so that the second arm 33R dedicated to rotor honing can be replaced and attached to the second arm 33 dedicated to diaphragm honing.

That is, in the case of the first embodiment applied to the diaphragm honing, as shown in FIG. 6, since the distance between the two opposing diaphragms DF1 and DF2 is relatively large, both sides of the diaphragm DF1 are used for polishing. In order to change the direction of the injection nozzle, the nozzle reversing device 40 and, as described in FIG. 6, correspond to the undulation of the cross-sectional shape of the diaphragm,
Nozzle moving device 50 for adjusting the position of the injection nozzle
Was set up. On the other hand, in the case of the second embodiment applied to rotor honing, the gap between the rotor blades, which is the surface to be cleaned, is narrow (usually about 100 to 200 mm), and the shape of the opposing surface to be cleaned is small. Are substantially similar to each other, and there is no particular large ups and downs, so that the nozzle reversing device 40 and the nozzle moving device 50 provided in the first embodiment are not required, but rather, they are inserted between the narrow surfaces to be polished. Since a second arm 33R equipped with a left and right bidirectional injection type rotary nozzle that is small enough to be rotated is required, it is a structure for exchanging the second arm dedicated to the object to be polished.

In FIG. 12, by directing the connecting rod device 30 toward the upper half direction of the rotor and rotating the first arm 31 and the second arm 33R (state shown by the solid line), about 1 of the upper half of the rotor is obtained. / 2 area honing is possible, and when the first arm 31 and the second arm 33R are directed to the lower half direction of the rotor (state shown by the broken line), about 1 / third of the lower half of the rotor
Honing of two areas is possible. It is also possible to rotate the rotor by 180 ° and perform honing work around the entire circumference of the rotor. In addition, except the exclusive portion of the second arm 33R,
Since it is the same as the first embodiment shown in FIG. 1, detailed description thereof will be omitted.

FIG. 15 shows an injection nozzle portion 70 dedicated to the rotor.
FIG. In FIG. 15, the second arm 33
When the motor 71 incorporated in the R rotates, this rotation is transmitted to the nozzle shaft 74 via the bevel gears 72, 73, and the nozzle shaft 74 is rotated. Both ends of the nozzle shaft 74 are
The rotary nozzle plates 75 and 76 are closed, and the rotary nozzle plates 75 and 76 are respectively covered with the abrasive cleaning material injection holes 75a and 76.
a is provided.

The polishing / cleaning material supplied from the polishing / cleaning material supply device (not shown) is connected to the connecting portion 78 of the blast hose (not shown).
The flow path 77a in the nozzle shaft holder 77a and the flow path 74a in the rotary nozzle shaft 74 are split from the supply hole 78a in the rotary nozzle shaft 74 to the left and right to form the rotary nozzle plates 75, 7
This is a structure in which the injection is performed from the injection holes 75a and 76a which are bored at an angle of θ with respect to the center of the rotation axis of 6.

FIG. 14 shows the injection nozzle portion 70 shown in FIG.
FIG. 3 is a diagram showing a state in which the cleaning blade is inserted between the rotor blade rows of the turbine rotor, the abrasive cleaning material is injected by the rotary honing method, and the left and right rotor blade rows are simultaneously subjected to honing work.

The second arm is rotated between the rotor blade rows,
The situation where the rotary honing is used for cleaning is the same as that of the first embodiment, and it is also similar to the first embodiment that the blades having a complicated curved surface can be uniformly and efficiently cleaned. Also, the line honing can be performed by stopping the rotation of the rotary nozzle plate so that the honing work adapted to the special shape can be performed, as in the first embodiment.

When the surface to be polished is only on one side and it is not necessary to spray the cleaning material on both sides of the spray nozzle, a plug is screwed into the spray hole 75a or 76a to close the spray hole, or Alternatively, it can be easily changed to a single jet nozzle by replacing it with a disc having the same shape as the rotary nozzle plates 75 and 76 and having no jet holes.

In the above description, both the first embodiment and the second embodiment have been described with respect to an example of one set of automatic honing devices, but on the rail mount 10 shown in FIGS. It is also possible to mount a plurality of sets of honing devices in each direction, and depending on the length of the object to be cleaned, it is possible to shorten the working time by operating a plurality of sets of automatic honing devices simultaneously.

Although the description of the dust scattering prevention equipment (honing house) and the abrasive cleaning material recovery equipment during the honing operation is omitted, it is natural that necessary related auxiliary equipment be provided.

Next, another embodiment in place of the injection nozzle shown in FIG. 15 will be described. In the injection nozzle of FIG. 15, two injection holes are arranged opposite to each other on the same axis in order to simultaneously spray the abrasive material onto the surface to be abraded on both sides of the injection nozzle. The cleaning material is divided into left and right. For this reason, the entire width of the injection nozzle in FIG. 15 is about 100 mm at the smallest, and it cannot be used for blasting with a width smaller than that. Therefore, we have developed Figure 17-
It is the thin injection nozzle shown in FIG.

FIG. 17 is an external side view of the thin injection nozzle, FIG. 18 is a sectional view taken along the line AA of FIG. 17, and FIG. 19 is a sectional view taken along the line BB of FIG. , FIG.
It is sectional drawing which followed CC line of FIG.

The nozzle device main body 14 is attached to one end of the second arm 33R for rotating the entire thin jet nozzle device 140.
1 is installed. Inside the main body 141,
Two nozzle shafts 14 rotatably supported by the main body 141
3L, 143R are provided in parallel, each nozzle shaft 143
L and 143R are provided with injection nozzles 144L and 144R each having an injection hole formed at each shaft end and inclined by an angle θ with respect to the axis. Spur gears 146L and 146R are fitted to the outer peripheral portions of the nozzle shafts 143L and 143R, respectively.
The spur gears 146L and 146R respectively have bearings 145L and 1
It is rotatably supported by the main body 141 by 46R.
The spur gears 146L and 146R mesh with each other, and when one rotates in the clockwise direction, the other rotates in the counterclockwise direction. The spur gear 146L is connected to a rotary drive system for an injection nozzle, which is composed of a spur gear 147 for rotating the spur gear 146L, bevel gears 148 and 149, and a drive shaft 150.

The central portion of the second arm 33R is a polishing / cleaning material supply passage 33Ra, and the polishing / cleaning material supplied from a polishing / cleaning material supply device (not shown) is supplied from the arrow 160 to the flow path 160L,
The flow is divided into 160R, and the supply path covers 142L and 142R
It is configured to be guided to the injection nozzles 144L and 144R through the above. That is, the one-sided injection type nozzle including the supply path cover 142L, the nozzle shaft 143L, and the injection nozzle 144L and the one-sided injection type nozzle including the supply path cover 142R, the nozzle shaft 143R, and the injection nozzle 144R are arranged so that their axes are parallel to each other. Drive mechanism 150, 149, 1 connected to a motor (not shown) for mounting two sets and driving them
It is rotationally driven by 48, 147, 146L, 146R.

Next, the operation of this thin jet nozzle device will be described. When the drive shaft 150 connected to the nozzle drive motor (not shown) rotates, this rotational force is transmitted to the bevel gears 149, 148 and the spur gears 147, 146L, 146R, and the injection nozzles 144L, 144R simultaneously move to each other. Rotate in the opposite direction. On the other hand, the polishing / cleaning material supplied from the polishing / cleaning material supply device (not shown) is supplied from the channels 160 to 16
The nozzles 144L and 14 are divided into 0L and 160R, respectively.
It is supplied to 4R. The blasting / cleaning material is jetted to the blasted portion of the turbine rotor, that is, the blade row portion of the turbine rotor, which are erected in the jetting direction of the nozzles. Since this injection is performed from the injection hole inclined by θ with respect to the rotating nozzle axis, the result is 2θ.
It becomes a conical jet that spreads at an angle of. By rotating the nozzle arm 33R, or by stopping the nozzle device at a fixed point and rotating the turbine rotor side, polishing with a constant width is performed along a polishing trajectory generated by relative movement between the two. . By sequentially moving the nozzle device in the radial direction of the turbine rotor, the polishing surface can be effectively and efficiently cleaned while spraying the polishing material simultaneously on the left and right side of the nozzle device. It can be performed.

[0051]

According to the present invention, the labor time can be greatly shortened by the labor saving by releasing the worker from the bad and severe working environment and the efficient blasting work by the automatic machine. The regular inspection period of the plant is shortened.

[Brief description of drawings]

FIG. 1 is an external view in which an automatic honing device according to a first embodiment of the present invention is applied to diaphragm honing.

FIG. 2 is a side view of FIG.

FIG. 3 is a perspective view of the automatic honing device shown in FIG. 1 applied to diaphragm honing.

FIG. 4 is an explanatory diagram of a device configuration of the automatic honing device according to the first embodiment.

5 is a structural diagram of the rotary jet nozzle shown in FIG.

FIG. 6 is an explanatory diagram of an injection nozzle moving device used in the automatic honing device of the first embodiment.

FIG. 7 is an external view of a lower half diaphragm.

FIG. 8 is an explanatory diagram of a method of cleaning a diaphragm.

FIG. 9 is a diagram for explaining a method of cleaning a diaphragm.

FIG. 10 is a diagram for explaining the operation of the connecting rod (honing arm) when the lower half diaphragm is ground and cleaned.

FIG. 11 is an explanatory diagram of the operation of the connecting rod (honing arm) when the upper half diaphragm is ground and cleaned.

FIG. 12 is an external view in which the automatic honing device according to the second embodiment of the present invention is applied to the honing of a turbine rotor.

FIG. 13 is a view taken in the direction of arrow P of FIG.

FIG. 14 is an explanatory diagram of a method of polishing and cleaning a turbine rotor.

FIG. 15 is a structural diagram of a rotary injection nozzle for a turbine rotor.

16 is an enlarged view of a main part of FIG.

FIG. 17 is an external side view of a thin nozzle device equipped in the second embodiment of the present invention.

18 is a cross-sectional view taken along the line AA of FIG.

19 is a cross-sectional view taken along the line BB of FIG.

20 is a sectional view taken along the line CC in FIG.

FIG. 21 is an explanatory diagram of a method of lifting the diaphragm from the turbine casing.

FIG. 22 is an explanatory diagram of a relationship between a diaphragm and a diaphragm pedestal.

FIG. 23 is a diagram for explaining the honing operation of the diaphragm according to the conventional method.

FIG. 24 is an explanatory diagram of honing work for a turbine rotor according to a conventional method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Diamond, 3 ... Diaphragm cradle, 2 ... Honing house, 7 ... Worker, 10 ... Rail mount, 20 ... Traveling device, 30 ... Connecting rod device, 31 ... 1st arm, 32 ... 1st arm drive motor, 33 ... 2nd arm, 34 ... 2nd arm drive motor, 40 ... Nozzle reversing device, 41 ... Nozzle reversing motor, 50 ... Nozzle moving device, 51 ... Nozzle moving device motor, 60 ... Nozzle rotating device, 61 ... Plast Hose, 62 ... Nozzle rotating shaft, 65a, 65b ... Gear, 6
6 ... Nozzle rotation motor, 140 ... Thin injection nozzle device, 144L, 144R ... Injection nozzle.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadayuki Shimizu 3-2-2 Sachimachi Hitachi City, Ibaraki Prefecture Hitachi Engineering Service Co., Ltd. (72) Inventor Hirobo Suzuki 3-2 Sachimachi Hitachi City, Ibaraki Prefecture No. 2 inside Hitachi Engineering Service Co., Ltd.

Claims (13)

[Claims] 1. An injection nozzle for cleaning a surface of a stationary blade by spraying a polishing and cleaning material on a large number of stationary blades provided on a diaphragm obtained by disassembling a steam turbine, and an arm having the injection nozzle attached to a tip portion thereof. An automatic honing device comprising a device for automatically scanning the jet nozzle with respect to each vane of the diaphragm by automatically moving the arm, wherein the jet nozzle is provided along the irregularities of the surface of the vane to be ground and cleaned. The injection nozzle to the tip of the arm by using a link mechanism that moves the injection nozzle with respect to the arm so that the distance between the nozzle tip of the injection nozzle and the surface of the vane is kept constant. An automatic honing device characterized by being installed. 2. An injection nozzle for cleaning the surface of a stationary blade by spraying a polishing and cleaning material on a large number of stationary blades provided on a diaphragm obtained by disassembling a steam turbine, and an arm having the injection nozzle attached to its tip. An automatic honing device comprising a device for automatically scanning the jet nozzle with respect to each vane of the diaphragm by automatically moving the arm, wherein the jet nozzle is provided along the irregularities of the surface of the vane to be ground and cleaned. A method for controlling an automatic honing device, characterized in that the jet nozzle is moved so that the distance between the nozzle tip of the jet nozzle and the surface of the vane is kept constant when the jet nozzle is moved. 3. An injection nozzle for cleaning a surface of a moving blade by spraying a polishing agent on a large number of moving blades provided on a rotor obtained by disassembling a steam turbine, and an arm having the injection nozzle attached to a tip portion thereof. In an automatic honing device comprising a device for automatically moving the arm to scan the jet nozzle with respect to each stationary vane of the diaphragm, the jet nozzle has a moving blade on each side of the jet nozzle. An automatic honing device, characterized in that it is provided with two nozzle holes for simultaneously injecting a polishing agent. 4. The injection nozzle according to claim 3,
An automatic honing device having a structure in which a polishing / cleaning material supplied into a cylindrical shaft is jetted from nozzle holes provided at respective axial ends of the cylindrical shaft. 5. The automatic honing device according to claim 4, wherein each of the nozzle holes is provided so as to be inclined by a required angle θ with respect to the axis of the cylindrical shaft. 6. The automatic honing device according to claim 5, further comprising a rotation driving unit that rotates the cylindrical shaft. 7. The injection nozzle according to claim 3,
Flat-cylindrical one-sided injection nozzle with the right end closed and a nozzle hole on the left end and a flat-cylindrical one-sided injection nozzle with the left end closed and a nozzle hole on the right end are on the same plane with their axes parallel. An automatic honing device characterized by being placed in. 8. The automatic honing device according to claim 7, wherein each nozzle hole is provided so as to be inclined by a required angle θ with respect to an axial center. 9. The automatic honing device according to claim 8, wherein gears are provided on the outer sides of the two flat cylindrical shapes and both gears mesh with each other. 10. The automatic honing device according to claim 9, further comprising drive means for applying a rotational force to one of the gears. 11. An automatic honing device having a structure in which the injection nozzle according to claim 1 and the injection nozzle according to any one of claims 3 to 10 can be replaced. 12. Assuming three orthogonal X, Y, Z axes including horizontal X and Y axes, a plurality of connecting rods can be freely rotated by a plurality of joints around an axis parallel to the X axis. Rotated by a connected connecting rod device, an injection nozzle device for injecting a polishing / cleaning material to the tip of the connecting rod device, and a rotating shaft provided in parallel with the X axis orthogonal to the axis of the connecting rod. A nozzle rotating device, a nozzle moving device for changing the distance between the nozzle tip of the jet nozzle device and the axis of the connecting rod in the X-axis direction, and a scavenger for supplying a scavenger material to the jet nozzle. A material supply device, a traveling device that mounts each of these devices on its own in the X-axis direction, a traveling rail device, and a control device for controlling each device are provided, and the traveling device travels. The connecting rod is placed in a gap between a plurality of surfaces to be polished which are vertically arranged at arbitrary intervals in the X-axis direction. A honing operation is performed by injecting a polishing and cleaning material from an injection nozzle while rotating the device on an axis parallel to the X-axis, and a traveling device moves the injection nozzles in the X-axis direction to be aligned in parallel. The honing operation of the sweep surface is sequentially performed, and the entire traveling girder provided with the traveling rails of the traveling device is mounted on the traverse device that is self-propelled in the Y-axis direction orthogonal to the traveling direction, and the connecting rod device, the traveling device, What is claimed is: 1. An automatic honing device, comprising an automatic honing device comprising a traveling girder and a traversing device, which is configured so that it can be moved closer to or away from an object to be ground, and the grinding and cleaning material injection hole of the injection nozzle device is X-shaped. An injection nozzle with an arbitrary angle to the axis of rotation in the axial direction, which is capable of injecting in both the left and right directions with respect to the axis of the connecting rod, is used to inject the polishing agent while rotating the nozzle. Automatic honing apparatus characterized by opposing HiKen 掃面 was left simultaneously blast constituting the left and right. 13. The method according to claim 12, wherein a part of the connecting rod device is replaced with a device suitable for the surface to be cleaned in response to a difference in surface distance between the surfaces to be cleaned or a difference in undulation shape. An automatic honing device, characterized in that the main part of the automatic honing device is configured to be commonly used for various surfaces to be polished.