JPH08303747A - Chimney cleaning method and its inspection method - Google Patents

Abstract

PURPOSE: To enable a lining surface of a chimney to be cleaned safely by a method wherein a cleaning brush is fixed to a circulating barrel part, the circulating barrel part is rotated around its vertical axis and at the same time the cleaning brush is rotated to cause the lining surface of the chimney to be automatically cleaned. CONSTITUTION: A circulating motor 9 is connected onto a vertical shaft 10a of a circulating barrel part 10. A cleaning brush 13 is arranged such that its vertical end is supported at a U-shaped supporting sear 17 at a leading end of a first cylinder device 12 fixed at the circulating barrel part 10 through a horizontal first arm 11, and then a cleaning motor 14 is fixed to a lower part of a supporting member 17. The circulating motor 9 is driven to cause the circulating barrel 10 to be circulated around the vertical shaft 10a and concurrently the cleaning motor 14 is driven to cause the cleaning brush 13 to be rotated and then a lining surface 2a of a chimney 2 is automsatically cleaned. During this operation, the supporting member 17 and the circulating barrel part 10 are ascended or descended only in a predetermined amount so as to clean the lining surface 2a in another segment in sequence.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning method and an inspection method for inspecting and cleaning the inside of a chimney such as a thermal power plant or a steel mill.

[0002]

2. Description of the Related Art Conventionally, for a steel chimney (having a height of 200 m, for example) of a thermal power plant, a steel mill, etc., it is necessary to regularly inspect and clean the inner lining surface and perform maintenance. There is.

At the time of inspection and cleaning, a beam is installed on the upper part of the chimney, a wire wound around a winch is hung on the sheave attached to the beam, and the wire is hung inside the chimney. A riding gondola is attached to the tip of the wire. Fix it, a worker rides on this riding gondola, operates the winch by operating the operating device provided on the riding gondola, raises and lowers the gondola to a position suitable for the cleaning place at any time, for example with a bamboo broom etc. The adhered substances (fine particles with high floating and tackiness) adhering to the lined surface are cleaned and removed.

After this cleaning, the operating device is operated again to move the passenger gondola up and down, and the inner surface of the chimney is visually inspected from its lower end to its upper end, and the lining is dropped or cracked or its floating state, their position, etc. To confirm.

Further, the lining surface is hit with a hammer, the presence or absence of abnormality is judged by the degree of reflected sound, the state and position of the abnormality are recorded on recording paper, and repair is performed based on the recording.

[0006]

As described above, there is a problem in that the cleaning work and the inspection work in the chimney are performed at a high place and for a long time, which is dangerous.

Further, since the inside of the chimney is a bad environment in which the deposits attached to the lining are floating, it is unhygienic for the worker to work for a long time in such a chimney, and therefore,
It is easy to damage the worker's body.

Further, in the high place and the bad environment as described above, it is a difficult work to record the defect state of the lining surface. Therefore, an object of the present invention is to provide a chimney cleaning method and inspection method that can solve the above problems.

[0009]

A means for solving the problems in the present invention is a chimney cleaning method for cleaning an inner lining surface of a chimney body, wherein a winch device having one end side inside the chimney body. A lower body which is attached to the other end side of the cord wound around the lower body and which is provided with a supporting member having a revolving body portion at a lower portion through a revolving motor and is hung from the revolving body portion. The swivel body is positioned by abutting a fixture attached to each of the support members via a positioning arm to the lining surface, and a cleaning brush attached to the swivel body via a cleaning arm is brought into contact with the lining surface. In addition to rotating, drive the swivel motor to swivel the swivel body around its vertical center axis, then separate each fixture and cleaning brush from the lining surface to drive the winch device. A method for cleaning the chimney for cleaning the lining surface of the supporting member and the rotating body portion is raised and lowered by a predetermined amount sequentially another predetermined section by winding or derive rigging Te.

A method of inspecting a chimney for inspecting an inner lining surface of a chimney body, wherein one end of the chimney body is attached to the other end of a rope wound around a winch device and the chimney is rotated. A support member having a swivel body portion is inserted and hung from the lower part of the swivel motor, and a fixture attached to each of the lower body portion and the support member provided at the lower portion of the swivel body portion through positioning arms. Position the swivel body by abutting against the lining surface, swivel the inspection device attached to the swivel body around the vertical center axis of the swivel body, and then attach each fixture to the lining surface. Of the chimney, which is separated from the vehicle, and the winch device is driven to wind or pull out the rope to raise and lower the support member and the swing body by a predetermined amount to sequentially inspect the lining surface in another predetermined section. It is a method.

[0011]

In the above means for solving the above-mentioned problems, a support member having one end side attached to the other end side of a rope wound around a winch device and having a swing body portion in the lower portion through a swing motor inside the chimney body. Insert and hang it, and position the swivel body by abutting the lining surface with the fixtures attached to the lower body and the supporting member provided on the lower part of the swivel body through positioning arms. The cleaning brush attached to the body via the cleaning arm is brought into contact with the lining surface to rotate it, and the revolving motor is driven to revolve the revolving body around its vertical center axis. The brush is separated from the lining surface, and the winch device is driven to wind or pull out the rope to raise and lower the support member and the swing body portion by a predetermined amount to sequentially separate different sections. Since the lining surface is cleaned, the lining surface inside the chimney can be cleaned automatically and without introducing a worker inside the chimney, so that the adhered matter that adheres to the lining surface floats in a bad environment. Eliminates the need for work at the same time, and eliminates the need for workers to carry out cleaning work in high places.

In addition, a support member having one end side attached to the other end side of the rope wound around the winch device and having a turning body at the bottom is inserted through a turning motor inside the chimney body. Position the swivel body by attaching the fixtures that are hung and attached to the lower body and the support member provided under the swivel body via positioning arms to the lining surface, and then attach to the swivel body. The inspection device is driven around the vertical center axis of the turning body by driving the turning motor, and then each fixture is separated from the lining surface, and the winch device is driven to wind or pull out the rope. As a result, the support member and the swing body are moved up and down by a predetermined amount, and the lining surface in different predetermined sections is inspected in sequence, so that the lining surface inside the chimney can be checked automatically and the operator can Done without introducing, thus eliminating the work in adverse environments where deposits adhering to the lining surface is floating, also eliminates inspection at heights by the operator.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cleaning / inspecting device according to an embodiment of the present invention will be described below with reference to the drawings. It is a cleaning device 3 for cleaning an inner lining surface 2a of a steel chimney 2 of a thermal power plant or the like. , And an inspection device 4 for inspecting the damage state of the lining surface 2a after cleaning with the cleaning device 3.

As shown in the overall configuration diagram of FIG. 1, the enlarged front view of FIG. 2, and the enlarged plan views of FIGS. 3 and 4, the cleaning / inspecting device 1 is a winch device arranged outside the chimney 2. On the scaffolding gondola 6 arranged below the protective device 5, which will be described later, suspended from the W via the cord 7B, the cord 7 is attached.
Suspended via A.

A tubular support member 8 is suspended from the rope body 7A, and below the support member 8, a turning motor 9 incorporated therein and a speed reducer 9a connected to the turning motor 9 are provided. A swivel body 10 supported so as to be freely swiveled around a vertical axis 10a is provided, and on the outer peripheral surface of the swivel body 10,
A horizontal first arm 11 is attached toward the inner peripheral surface of the chimney 2, and a first cylinder device (for example, an air cylinder device is used) 12 as an expansion / contraction means is attached to a tip end portion of the first arm 11 via a first cylinder device 12. A cleaning brush 13 for cleaning the lining surface 2a is attached, and a cleaning motor 14 for rotating the cleaning brush 13 around the vertical shaft 13a.
Is provided, and a reinforcing member 16 for the first arm 11 that is inclined via a bracket 15 is provided in the upper part of the turning body 10 and the first arm 11.

Further, as shown in the detailed view of FIG. 5, a cooling device 55 for cooling the turning motor 9 installed in the supporting member 8 is provided, and the cooling device 55 is located below the supporting member 8. And the support member 8
The spiral fins 57 arranged on the inner peripheral surface of the cooling motor 5 and on the outer peripheral portion of the turning motor 9 and the cooling air 5 from the intake port 56.
6a, and a blower 59 for passing through the spiral cooling passage formed by the fins 57 and discharging it to the outside of the support member 8.

According to this cooling device 55, the cooling air 56a taken from the intake port 56 passes through the spiral cooling passage and is discharged to the outside of the support member 8. When passing, it is possible to prevent dust from adhering to the outer peripheral portion of the turning motor 9 due to centrifugal force. Therefore, the turning motor 9 fails (burns) due to the attachment of dust.
Can be prevented, and thus the life of the turning motor 9 can be extended.

The upper and lower ends of the cleaning brush 13 are axially supported by a U-shaped support body 17 attached to the tip of the first cylinder device 12, and the support body 17 is horizontally supported by the first cylinder device 12. The cleaning motor 14 is swingably supported in the vertical plane via 17 a, and the cleaning motor 14 is attached to a lower portion of the support body 17.

A control device 20 for controlling the drive of the first cylinder device 12, the turning motor 9 and the cleaning motor 14 is arranged in a lower case 19 below the turning body part 10 and a control box 20. Is installed in the control box 20
A cooling device 21 for supplying cooling air for cooling the control device 18 is attached to the.

As shown in the detailed view of FIG. 6, the cooling device 21 includes a cooling air supply pipe 61 whose one end communicates with the upper portion of the control box 20 and the other end of the cooling air supply pipe 61. Portion 61a, a blower 62 provided in the vicinity of the intake port 61a of the cooling air supply pipe 61, a centrifugal filter device 63 connected midway on the cooling air supply pipe 61, and the cooling A stop valve 64 provided in the middle of the air supply pipe 61 and between the centrifugal filter device 63 and the control box 20, a dust discharge valve 65 provided at the bottom of the centrifugal filter device 63, and the control It is composed of an outlet-side filter 67 provided in the middle of an exhaust pipe 66 whose one end is connected to the lower portion of the box 20 and a discharge valve 68 provided at the end of the exhaust pipe 66.

In this cooling device 21, when the blower 62 is driven, the cooling air 62a is supplied from the intake port 61a into the control box 20 by this driving, but a centrifugal type is provided in the middle of the cooling air supply pipe 61. Since the filter device 63 is provided, the dust contained in the cooling air 62a is filtered and collected at the bottom of the centrifugal filter device 63.

The cooling air 62a after cooling the controller 18 is discharged from the discharge valve 68 after dust is filtered again by the outlet side filter 67. Since the dust collected on the bottom of the centrifugal filter device 63 needs to be discharged at a predetermined time interval, at this time, the stop valve 6
4 and the discharge valve 68 are closed, only the dust discharge valve 65 is opened, and the blower 62 is driven for a predetermined time to discharge the dust.

According to the cooling device 21 as described above, the control device 18 in the control box 20 or the electric parts arranged in the vicinity thereof can be cooled by the cooling air 62a which has filtered dust. It is possible to prevent dust from adhering to the control device 18, and thus to extend the life of the control device 18. And when the inside of the chimney 2 is rich in water,
By providing a dehumidifier on the control box 20 side of the centrifugal filter device 63 and supplying the cooling air 62a into the control box 20 after dehumidifying it, the life can be further extended.

The inspection device 4 is attached to the upper part of the swivel body 10 via a mount 10b and has a primary inspection photographing device 22 having an illuminator 22a. A second arm 23 horizontally attached to the inner peripheral surface of the chimney 2 so as to project to the side opposite to the one arm 11, and a second cylinder device 24 as an expansion / contraction means at the tip of the second arm 23. Image pickup device 25 for secondary inspection, which is attached via
And a tapping sound inspection device having a tapping hammer, a microphone, and an accelerometer for inspecting the lining surface 2a by hitting a predetermined number of the lining surface 2a after being attached to the tip of the second cylinder device 24. 26, and the upper part of the swing body 10 and the second arm 2
The reinforcing member 27A for the second arm 23 is attached in the middle of 3 via the bracket 27 while being inclined. In addition, the lining surface 2 is provided at the tip of the second arm 23.
An unevenness sensor (not shown) for detecting the unevenness of a is arranged.

The primary inspection imaging device 22, the second cylinder device 24, the secondary inspection imaging device 25, and the hammering sound inspection device 26 are driven and controlled by the control device 18, respectively.

The swivel body 10 is also used for cleaning and inspection work.
A fixing device 28 for preventing the swinging of the lower body 1 is provided on the outer peripheral surface of the support member 8 and the lower body 1.
A plurality of third arms 29 attached to each of the outer peripheral surfaces of 9 in the horizontal and radial directions toward the circumferential surface of the chimney 2.
And a fixing roller 31 attached to the tip end of the third arm 29 via a third cylinder device 30 as expansion / contraction means and abutting against the inner peripheral surface of the chimney 2. The third arm 29 has a reinforcing member 33 for the third arm 29, which is obliquely attached via a bracket 32 in the middle of the support member 8 and the third arm 29, and the third arm on the lower trunk 19 side. 29 is the lower torso
And a reinforcing member 33 for the third arm 29 which is obliquely attached via a bracket 32 in the middle of the third arm 29, and the third arm 29 on the lower trunk 19 side has the third arm 29 A tilt sensor (not shown) for detecting tilt is attached. And the third cylinder device 30
Is also controlled by the controller 18.

A monitoring camera 8b that allows the operator to arbitrarily observe the operating status of the entire apparatus and the status inside the chimney 2 via an annular member 8a rotatably provided on the outer peripheral surface of the support member 8.
Is installed. Reference numeral 8c in the drawing is a motor for rotating the annular member 8a.

A cable C is connected to the control device 18, and the cable C is connected via a cable reel R arranged outside the chimney 2 to an operation room H arranged outside the chimney 2 on the ground. It is connected to an operating device 35 provided therein, and is configured to operate the control device 18 by the operating device 35. The cable C is paid out from the cable reel R as the cleaning / inspecting device 1 is moved up and down. Or it is rolled up. Reference numeral 36 in the figure denotes a power supply unit for supplying power to the operation device 35.

The operating device 35 is provided with an automatic operation switch for setting the cleaning / inspecting device 1 in an automatic operation mode, a vertical movement switch for starting up / down of the cleaning / inspecting device 1, and a cleaning operation. A cleaning switch, a primary inspection switch for starting the primary inspection, and a secondary inspection switch for starting the secondary inspection are provided.

Further, inside the control box 20, a position detector for detecting the height position of the cleaning and inspecting device 1 by the amount of winding and winding of the rope 7B of the winch device W, and the first arm 11 are provided. , And a circumferential direction detector that determines the circumferential position from the rotation angle of the second arm 23 and the absolute azimuth of the gyro compass.

Here, the above-mentioned protection device 5 used when assembling the cleaning / inspection device 1 as described above will be described with reference to the enlarged views of the essential parts of FIGS. 1, 7 and 8. As shown in FIG. 1, this is an aluminum support column 42 suspended vertically from the pulleys 41a, 41b, 41c attached to the beam member 40 above the chimney 2 via the rope 7B.
A sliding member 43 slidably fitted on the support column 42, and a plurality of base members which are rotatably attached to the sliding member 43 and which are arranged radially around the support column 42 in a plan view. A cylindrical arm 44, a tension cable 45 stretched between the upper end of the column 42 and the tip of each arm 44, and a flexible cable provided so as to cover each tension cable 45 from above. And a net-like covering body 46 made of a fibrous material,
The scaffolding gondola 6 is attached to the lower part of 2.

The arm 44 is composed of an inner balloon-like body (not shown) made of synthetic rubber and capable of injecting and releasing air, and an outer aramid fiber. The surface of the aramid fiber is coated with a paint. ing.

The lower end of the outer periphery of the cover 46 and each arm 4
The other end of 4 is connected by a connecting line (for example, a metal chain is used) 47 having a predetermined weight. Further, a stretching cord 48 for spreading the arm 44 by stretching the arm 44 by pulling it downward is attached to the lower portion of the sliding member 43.

The protective device 5 constructed in this way is used as the chimney 2
In order to carry in the inside, the air is removed from each arm 44 in advance, and the sliding member 43 is slid above the column 42,
The covering body 46 is kept closed, the inside of the chimney 2 is taken in, and the column 42 is suspended by the cord 7B hanging in the chimney 2. Then, the cover 46 can be expanded by injecting air into the arm 44 and pulling the expansion cord 48 downward.

The scaffolding gondola 6 is a protective device 5.
Is attached after being hung on the rope 7B, and the support member 8 of the cleaning and inspection device 1 is hung on the bottom plate 49 provided on the scaffolding gondola 6 by the rope 7A. Assemble the cleaning and inspection device 1.

When the cleaning / inspection apparatus 1 is assembled, as shown in FIG.
As shown in FIG. 5, when a fallen object (for example, a stripped lining) 50 falls on the covering body 46 from above the chimney 2, the covering body 46 bends and the connecting rope 47 is bent by the bending amount of the covering body 46. Is pulled upward to absorb the impact of the falling object 50.

Therefore, it is possible to prevent the fallen object 50 from being broken by the fall of the covering body 46 and falling on the scaffolding gondola 6 (worker), which is safe.
Note that the protective device 5 and the scaffolding gondola 6 are removed after the cleaning / inspection device 1 has been assembled.

Next, the sequence of raising and lowering the cleaning / inspecting device 1 to a predetermined position in the chimney 2 will be described with reference to FIG. In the cleaning / inspection apparatus 1 configured as described above, the operation room H
When an operator operates the operation device 35 in the inside to turn on the automatic operation switch to set the automatic operation mode, and when the vertical movement switch is turned on to set the moving height of the cleaning and inspecting device 1, the control device 18 controls the winch device. A drive signal is output to W [step 1], whereby, for example, the rope 7B is wound up, the cleaning / inspecting device 1 starts to rise, and the cleaning / inspecting device 1 is moved to the chimney 2
Since it rises up to the set height inside, that is, the upper end, the control device 18 outputs a signal for stopping the drive of the winch device W [step 2].

Here, the control device 18 outputs a drive signal to the third cylinder device 30 [step 3], whereby the fixing roller 31 attached to the tip of the third arm 29 is attached to the inner surface of the chimney 2. It abuts and the whole device is positioned and fixed to the chimney 2.

Next, a method for cleaning the lining surface 2a of the chimney 2 will be described with reference to FIG. When the cleaning switch is turned on after raising the cleaning / inspection device 1 to a predetermined position in the chimney 2 as described above, the control device 18 outputs a drive signal to the turning motor 9 [step 1]. The turning body 10 turns until it reaches a preset turning base point.

Subsequently, the control device 18 outputs a drive signal to the first cylinder device 12, which causes the first cylinder device 12 to contract (step 2), and the cleaning brush 13
Is separated from the lining surface 2a, and then the control device 18
Outputs a drive signal to the third cylinder device 30 on the lower body 19 side [step 3], and adjusts the inclination of each third arm 29 within 1 ° by the inclination signal from the inclination sensor. To do. By this operation, the turning body 1
The 0s can be arranged almost vertically.

Next, the control device 18 outputs a drive signal to the turning motor 9, and the turning arm 10 starts turning by this signal so that the second arm 23 causes the vertical shaft 10 of the turning trunk 10.
Around 360 °, only 360 ° is swiveled, and while the second arm 23 is swung, a concave / convex sensor (an ultrasonic sensor is used) is used to store a portion where the concave / convex of the lining surface 2a is ± 30 mm or more [Step 4]. .

Then, a drive signal is output from the control device 18 to the first cylinder device 12 to bring the cleaning brush 13 into contact with the lining surface 2a and the cleaning motor 14
Drive signal is output to the controller [step 5], and the control device 1
A drive signal is output again from the rotating motor 9 to the turning motor 9, and this time, the turning body 1 is turned toward the turning base point in the opposite direction to the above.
0 turns 360 ° and the cleaning of the predetermined section is completed.

When the second arm 23 turns in the direction opposite to the above, the unevenness of the lining surface 2a is ± 30 m.
If m or less, the controller 18 keeps the first cylinder device 12 in the extended state [step 6], and if the unevenness of the lining surface 2a is larger than ± 30 mm, the first cylinder is A signal is output so that the device 12 is contracted [step 7] to avoid uneven portions.

After that, the control device 18 outputs a drive signal for contracting the first cylinder device 12 and the third cylinder device 30, and the cleaning brush 13 and the fixing roller 3 are output.
In the state where 1 is separated from the lining surface 2a, a drive signal is output to the winch device W [step 8], the rope 7B is extended, and the set height, that is, an amount slightly smaller than the height of the cleaning brush 13 (for example, 40 cm). ), The cleaning / inspection device 1 is lowered, and then a drive stop signal is output to the winch device W, and then the above operation is repeated, whereby the chimney 2
The entire lining surface 2a of is cleaned.

By the way, in the embodiment of the present application, the first cylinder device 12 is extended, the cleaning brush 13 is rotated, and the swivel body 10 is swung to clean a predetermined position in the chimney 2, and the lining surface 2a is cleaned. When the unevenness is larger than ± 30 mm, the first cylinder device 12 is contracted to avoid the unevenness. In this case, it is necessary to align the vertical axis 10a, which is the central axis of the swivel body 10, with the center of the chimney 2. There is.

That is, if the vertical axis 10a of the swivel body 10 does not coincide with the center of the chimney 2, the lining surface 2a of the chimney 2
Even if the unevenness of is less than ± 30 mm,
This is because, as indicated by the phantom line, the irregularity is detected as ± 30 mm or more, and the first cylinder device 12 is controlled to contract. Note that FIG. 13 is a graph obtained by turning the unevenness sensor, in which the vertical axis represents the unevenness amount (mm), and the horizontal axis represents the turning angle (deg) of the turning barrel 10.

In order to avoid such an inconvenience, the graph obtained by the concave / convex sensor is corrected to detect only the portion of the lining surface 2a where the concave / convex is truly ± 30 mm or more, and the cleaning brush 13 is avoided at this portion. Need to let.

Therefore, as shown in FIG. 14, assuming that the eccentric amount in the x direction from the center P1 of the chimney 2 to the turning center P2 in the x direction is b and the eccentric amount in the y direction is b, b is obtained, and the measurement radius r _X from the turning center P2 to the inner surface of the chimney 2 by the unevenness sensor and the turning angle θ _X from the turning base point
The radius r of the chimney 2 is calculated in consideration of the above.

If the obtained radius r substantially matches the designed radius r, the values of a and b are correct, and even if the surface is displayed with irregularities of 30 mm or more, it is actually a normal surface. It can be determined that

[0051]

[Equation 1]

By the way, the calculation pitch is 0 ° in the north (θ _X1 ).
Every 60 °, the first measuring point of 0 °, 60 ° (θ _X2 )
2nd station, 120 ° (θ _X3 ) 3rd station, 180 °
There are 6 measurement points, the 4th measurement point of (θ _X4 ), the 5th measurement point of 240 °, and the 6th measurement point of 300 °. At each measurement point, the allowable range of ± 2 ° is used as the distance measurement data.

When the measurement radius at the first measurement point is r _X1 , the measurement radius at the second measurement point is r _X2 , and the measurement radius at the third measurement point is r _X3 , the eccentricity a is calculated by the following equation (2).
Can be requested.

[0054]

[Equation 2]

Similarly, the eccentricity a at the next measuring point can be obtained by the following equation (3).

[0056]

(Equation 3)

In this way, the eccentricity amount a can be sequentially obtained, and similarly, the eccentricity amount b can also be sequentially obtained by the following equations (4) and (5).

[0058]

[Equation 4]

[0059]

(Equation 5)

Whether or not the calculated eccentricity values a and b are correct is confirmed by the following equation (6).

[0061]

(Equation 6)

Equations (2), (3), (4),
The eccentricity amounts a and b obtained by the equation (5) and the measured values r _x and θ
Substituting _X into Eq. (6) and assuming the design radius to be r / y
= 1.0 ± 0.004, the eccentricity amounts a and b are correct, and otherwise, the eccentricity amounts a and b are correct. Try to ask.

By the way the actual radius r _r chimney 2, although there is an error between the radii of the design, r _X, theta _X, from the values of a and b, r _r (7) below Can be asked.

[0064]

(Equation 7)

If the radius on the circumference having no actual unevenness is r _X0 , this value can be obtained by the following equation (8).

[0066]

(Equation 8)

Here, the irregularity amount at the position of θ _X is Δr
When _{X Δr X} is determined by the following equation (9).

[0068]

[Equation 9]

When the value is calculated for each measurement point by the equation (9) and is graphed, the graph shown by the solid line in FIG. 13 is obtained. As described above, from the center P1 of the chimney 2 to the turning center P2
With the eccentricity in the x direction as a and the eccentricity in the y direction as b, these values are obtained, and the measured values are corrected and graphed, so that the true position of the unevenness ± 30 mm can be accurately known. Therefore, the drive of the first cylinder device 12 can be controlled at an accurate position, and the cleaning accuracy in the cleaning work can be improved.

Next, the primary inspection method after the cleaning work is completed will be described with reference to FIG. First, when the operator turns on the primary inspection switch, the control device 18 causes the lower body 1 to
A drive signal is output to the third cylinder device 30 on the 9th side [Step 1], and the inclination of the third arm 29 is adjusted within 1 ° by the inclination signal from the inclination sensor.

Subsequently, the control device 18 outputs a drive signal to the turning motor 9 while keeping the second cylinder device 24 in the contracted state [step 2], and the turning barrel 10 reaches the preset turning base point. And the drive of the turning motor 9 is stopped.

Then, the control device 18 outputs a drive signal to the photographing device 22 for primary inspection, thereby turning on the photographing camera and the light, and the control device 18 then intermittently outputs the drive signal to the turning motor 9. The primary inspection photographing device 22 photographs the lining surface 2a while the turning motor 9 is stopped, and a still image of the lining surface 2a is taken every 30 °, for example, and the still image of the lining surface 2a is a magneto-optical disk or the like in the operation room H. Is recorded in the recording device [step 3], and when it returns to the turning base point, a driving stop signal is output to the turning motor 9 and a driving signal is output to the third cylinder device 30, which is in a contracted state, and the primary state of the predetermined section is reached. Finish the inspection.

Subsequently, the control device 18 outputs a drive signal to the winch device W, winds up the rope 7B, and the cleaning / inspection device 1 by the set height (the same height as when cleaning the lining surface 2a). Is raised to stop the drive of the winch device W [step 4], and then the above operation is repeated to perform a primary inspection of the entire lining surface 2a of the chimney 2. It should be noted that even when the lining surface 2a is undergoing the primary inspection, when the photographing is completed by a predetermined number of steps (for example, 8 steps), the image data is output by the printer installed in the operation room H.

Next, the method of the secondary inspection after the completion of the primary inspection will be described with reference to FIG. This is because a more detailed still image of the unevenness of the lining surface 2a checked in the primary inspection is photographed by the secondary inspection photographing device 25 to determine whether the unevenness is ± 30 mm or more, and the tapping sound inspection device 26 determines the lining surface. The tapping sound of the lining surface 2a is inspected by tapping the 2a a predetermined number of times, and the tapping sound inspection device 26 checks the taping sound for abnormalities (lifting).

As shown in FIG. 12, when the operator first turns on the secondary inspection switch, the control device 18 outputs a drive signal to the third cylinder device 30 on the side of the lower case 19 as in the case of the primary inspection. [Step 1], according to the tilt signal from the tilt sensor, the tilt of each third arm 29 is adjusted to be within 1 °.

A drive signal is output to the turning motor 9 while the second cylinder device 24 is in a contracted state [step 2], and the turning body 10 is turned until reaching a preset turning base point. After that, a drive stop signal for the turning motor 9 is output [step 3].

Here, the control device 18 outputs a drive signal to the turning motor 9 again, and turns the turning body portion 360 by 360 ° for checking the unevenness as in the cleaning of the lining surface 2a. The location of 30 mm or more is determined [step 4].

When the unevenness is smaller than ± 30 mm, the control device 18 outputs a drive signal to the second cylinder device 24 to extend the drive signal, and the turning motor 9
Is driven intermittently (for example, every 15 ° and is changed by the inner diameter of the chimney 2) to drive the secondary inspection imaging device 25 and the tapping sound inspection device 26 to record a still image of the lining surface 2a. In addition, a tapping sound is checked [step 5].

The still image photographed at this time is vertically 1
The image is taken in the range of m and 1.6 m in width, and 24 images are taken while the swinging body 10 is rotated by 360 °.

Further, for the portion where the unevenness is ± 30 mm or more, the control device 18 outputs a drive signal to the second cylinder device 24 to shorten it, and intermittently drives the turning motor 9 as described above. , The secondary inspection imaging device 25 is driven to record a detailed still image of the lining surface 2a [step 6], and the secondary inspection of a predetermined section is completed when the vehicle returns to the turning base point.

Then, the control device 18 outputs a drive signal to the second cylinder device 24 and the third cylinder device 30 to reduce the drive signal, and then the control device 18 outputs a drive signal to the winch device W to search for the winch device W. The body 7B is led out, the cleaning / inspection device 1 is lowered by the set height, the drive of the winch device W is stopped [Step 7], and then the above operation is repeated to secondary the entire lining surface 2a of the chimney 2. Inspection to.

The above-mentioned still image is output by the printer installed in the operation room H every time the photographing of a predetermined number of steps, for example, 8 steps is completed, and the tapping result, the still image, and the inspection data of the distance are recorded in the recording device. (For example, a magneto-optical disk is used). Then, the worker repairs the lining surface 2a based on these inspection data. The operating status of the entire apparatus is monitored by the monitoring camera 8b at any time and used as a reference for cleaning and inspection work.

Further, the hammering sound inspection device 26 strikes the lining surface 2a of the chimney 2 with a hammering hammer, picks up the sound with a microphone, and uses an accelerometer as shown in FIGS. 15 and 16. The impact sound is graphed and the existence of cavities on the lining surface 2a of the chimney 2 is checked.

Then, the lining surface 2a of the predetermined section of the chimney 2 is inspected at, for example, 24 places.
At a place of 30 mm or more, the control device 18 outputs a drive signal to the second cylinder device 24 to make it contract, thereby avoiding a tapping sound inspection at a place of unevenness of ± 30 mm or more.

By the way, FIGS. 15 and 16 are graphs in which the vertical axis represents the amplitude of the tapping sound and the horizontal axis represents the time. FIG. 15 shows the waveform of the tapping sound in a sound part having no void, and FIG. The waveform in the unhealthy part with is shown.

However, it has been found that, even when the place where there is no cavity is hit, when there is a cavity in the vicinity, a waveform as if a cavity exists is generated as shown in FIG. Further, it has been found that the waveform is different depending on whether the lining surface 2a has a concave portion or a convex portion. From this, it is considered that the waveform changes due to the difference in acceleration at the moment of impact.

Therefore, an area (called a tapping sound envelope value) A constituted by the X axis, Y axis and the waveform is obtained, and the area A is divided by the acceleration α (A / α), and the sound portion is unhealthy depending on the value. As the part is judged, it becomes clear whether this unhealthy part is concave or convex.
The value of / α is divided into stages, for example, by color, and the operating room H
By displaying in a grid pattern on the internal display device, it is possible to inform the operator of the condition of the lining surface 2a of the chimney 2 in an easy-to-understand manner.

As described above, according to the embodiment of the present invention, most of the inspection work and the cleaning work of the lining surface 2a inside the chimney 2 are automatically introduced into the chimney 2 by the operator. Therefore, it is possible to eliminate the work in a bad environment in which the deposits attached to the lining surface 2a are floating.

Further, since the worker does not have to perform the cleaning and inspection work at a high place, the lining surface 2a of the chimney 2 can be safely cleaned and inspected. Further, since the drive of the entire device is accurately controlled by the control device, the inspection can be performed with high accuracy, and the inspection result is stored as an image or numerical value in the recording device, so that the inspection result can be easily processed. Become.

[0090]

As is apparent from the above description, according to the present invention, a fixing brush for positioning the swivel body is attached to the support member and the lower body, and a cleaning brush for cleaning the lining surface on the swivel body. The lining surface of the stack is automatically cleaned by rotating the cleaning brush while rotating the swivel body around its vertical axis, so that in a bad environment where the adhered matter on the lining surface is floating. Since the cleaning work of the worker can be eliminated and the cleaning work at a high place by the worker is eliminated, the lining surface of the chimney can be safely cleaned.

Further, a fixture for positioning the revolving body is attached to the support member and the lower body, an inspection device for inspecting the lining surface is attached to the revolving body, and the revolving body is placed around its vertical axis. Since the lining surface is automatically inspected by turning and the inspection device, the inspection work of the lining surface of the chimney can be performed accurately, and it is possible for an operator in an adverse environment where adhered substances on the lining surface are floating. Since the inspection work can be eliminated and the inspection work at a high place by the worker is eliminated, the lining surface of the chimney can be safely inspected.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a cleaning / inspection device according to an embodiment of the present invention.

FIG. 2 is a partially enlarged detailed view of the same.

FIG. 3 is a partially enlarged plan view of the same.

FIG. 4 is a partially enlarged plan view of the same.

FIG. 5 is a block diagram of a cooling device for the turning motor.

FIG. 6 is a configuration diagram of a cooling device of the control device.

FIG. 7 is also an enlarged detailed view of the protection device.

FIG. 8 is an enlarged view showing a deformed state of the cover when a falling object has fallen.

FIG. 9 is a flow chart showing the sequence of lifting and lowering the cleaning / inspection device to a predetermined position in the chimney.

FIG. 10 is a flowchart showing a method for cleaning the lining surface of the chimney.

FIG. 11 is a flowchart similarly showing a primary inspection method.

FIG. 12 is a flow chart showing a secondary inspection method of the same.

FIG. 13 is a graph diagram similarly obtained by turning the unevenness sensor.

FIG. 14 is an explanatory view showing the difference between the chimney radius and the measurement radius.

FIG. 15 is a graph showing a waveform of a tapping sound in a sound part having no void.

FIG. 16 is a graph showing a waveform at an unhealthy portion having a cavity.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaning / inspection device 2 Chimney 2a Lining surface 3 Cleaning device 4 Inspection device 5 Protective device 6 Scaffolding gondola 7A Rope body 8 Supporting member 9 Turning motor 10 Turning body 11 First arm 12 First cylinder device 13 Cleaning brush 18 Control Device 20 Control box 22 Imaging device for primary inspection 23 Second arm 24 Second cylinder device 26 Strike sound inspection device 28 Fixing device 29 Third arm 30 Third cylinder device 35 Operating device 42 Strut 43 Sliding member 45 Stretching rope 46 Cover 48 Stretching cord 50 Falling object H Operating room

Front page continuation (72) Haruo Shimono, inventor Haruo Shimono, 5-3-2 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. (72) Yutaka Yamada 5-3, Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture No. 28 in Hitachi Zosen Co., Ltd. (72) Inventor Kazuhito Miwa 5-3, Nishikujo, Konohana-ku, Osaka-shi, Osaka Prefecture No. 28 in Hitachi Shipbuilding Co., Ltd. (72) Kazushi Yamada Nishi-Kujo, Konohana-ku, Osaka-shi, Osaka 5th-328th Hitachi Shipbuilding Co., Ltd. (72) Inventor Manabu Miura 5th-3-28th Nishikujo, Konohana-ku, Osaka City, Osaka

Claims (2)

[Claims] 1. A method of cleaning a chimney for cleaning an inner lining surface of a chimney body, wherein the chimney body is provided with one end attached to the other end of a rope wound around a winch device and is swung. A support member having a swivel body portion is inserted and hung from the lower part of the swivel motor, and a fixture attached to each of the lower body portion and the support member provided at the lower portion of the swivel body portion through positioning arms. The swivel body is positioned by abutting the lining surface, and the cleaning brush attached to the swivel body via the cleaning arm is brought into contact with the lining surface and rotated, and the swivel motor is driven to move the swivel body Pivoting about a vertical center axis, then separating each fixture and cleaning brush from the lining surface and driving the winch device to wind or pull out the support member and slew. A method for cleaning a chimney, characterized in that a revolving trunk is moved up and down by a predetermined amount to sequentially clean a lining surface in different predetermined sections. 2. A method of inspecting a chimney for inspecting an inner lining surface of a chimney body, wherein the chimney body has one end side attached to the other end side of a rope wound around a winch device and is rotated. A support member having a swivel body portion is inserted and hung from the lower part of the swivel motor, and a fixture attached to each of the lower body portion and the support member provided at the lower portion of the swivel body portion through positioning arms. Position the swivel body by abutting against the lining surface, swivel the inspection device attached to the swivel body around the vertical center axis of the swivel body, and then attach each fixture to the lining surface. The lining surface of another predetermined section is sequentially inspected by moving the winch device to wind or pull out the rope to raise and lower the support member and the swing body by a predetermined amount. How to check the chimney.