JPH01281321A - Peeling removing device for chimney lining layer - Google Patents

Abstract

PURPOSE:To reduce the stress and deformation or a chimney cylinder body and to reduce the size of a reaction force support metal, by a method wherein a pair of rings for supporting a reaction force, a reaction force support metal, a cylinder for peeling, a tool for peeling, and a car gondola on which a tool energizing means is loaded are suspended and supported in the chimney cylinder body. CONSTITUTION:A car gondola 4 is suspended in a chimney 1, and a control panel is controlled by a worker in the car gondola 4. A piston rod 40b of a cylinder 40a for supporting a reaction force is expanded, and each reaction support metal 43 is pressed against the inner surface of a chimney cylinder body 2. In this case, a displacement between the centers of two sets of lining layer peeling devices 41 intercoupled through a coupling beam 37 and the center of the car gondola 4 is regulated through movement of moving guides 38a and 38b. In this case, a tool 47 for peeling is pointed to the cylinder body 2 side of the upper part of a lining layer 3 through the force of a cylinder energizing spring 48. Through expansion of a cylinder 46a for peeling, a tool 47 for peeling is pressed down to peel a lining. This constitution enables reduction of the size of a reaction force support metal.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention provides a method for removing the deteriorated lining layer when the lining layer constructed on the inner wall of the chimney barrel deteriorates over time and requires repair work. Relating to a device used for stripping and removing.

Conventional technologyIn general, in chimneys that emit exhaust gas etc. into the atmosphere,
■Preventing corrosion of the steel plate cylinder body due to exhaust gas, ■Insulating the exhaust gas so that it can fly high into the air, ■Reducing the temperature of the cylinder surface to prevent the coating film on the cylinder surface from peeling off, etc. The inner wall of the barrel is lined with fireproof material.

When deterioration or corrosion occurs in this lining layer over time, repair work is required.Repair work for this lining layer involves removing the deteriorated lining layer, and then spraying a new lining layer. This will be implemented by

As a conventional method for removing such a chimney lining layer, there is a method as shown in FIG.

In Fig. 3, 01 is a chimney, 02 is a chimney body made of steel plate with %O1, 03 is a lining layer that covers the inner circumferential surface of this chimney body 02, 04 is a gondola, and 05 is a chimney body 02
Pulley 06 attached to the upper end of is a wire rope from which gondola 04 is suspended.
By letting out the gondola 04, it is possible to raise and lower the gondola 04 into the chimney 01.

In addition, 07 is a stay that is extendably attached to gondola 04 to prevent the gondola from shaking, 08 is a worker on top of gondola 04, and 09 is a crusher like a breaker (rock drill) inside the chimney 01. Gondola 0 supported so that it can be raised and lowered
4 is stopped at a predetermined height position, and a worker 08 riding on the gondola 04 holds the crusher 09 in his hand and applies it to the lining layer 03 covering the inner peripheral surface of the chimney barrel 02. The lining 1903 is removed by hitting and crushing this.

However, in such a conventional chimney lining layer removal method, as described above, the worker 08 holds the crusher 09 in his hand and applies it to the lining layer 03 covering the inner peripheral surface of the chimney barrel 02. Since the lining layer 03 is removed by hitting and crushing the lining layer 03, a noise of about 80 to 100 phons is generated, which causes great damage to nearby residents. In addition, the usage time of impact and vibration tools such as crusher 09 is limited to two hours a day to prevent leukemia, hearing loss, etc., which requires many shift workers. There was also the problem of increasing construction costs.

In order to solve this problem, a chimney lining layer peeling and removal device as shown in FIG. 4 has been developed, and this device will be described below.

In FIG. 4, l is a chimney, 2 is a steel plate chimney barrel of this chimney 1, 3 is a lining layer that covers the inner peripheral surface of this chimney barrel 2, 4 is a gondola, and 5 is the upper end of the chimney barrel 2. 6 is a wire rope from which a hanging balance lO is suspended.
A gondola 4 is connected to the hanging balance 10 via a bin 11 and a center post 12, and the gondola 4 on which the worker 3 is riding is raised and lowered into the chimney 1 by winding or letting out a wire rope 6. It is now possible to do so.

Further, 13 is a control panel installed on the gondola 4, and 14 is a hydraulic unit also installed on the gondola 4.

Reference numeral 15 denotes an external gear provided on the outer circumferential surface of a rotating disk (not shown) rotatably attached to the lower center of the gondola 4, and a motor 16 attached to the lower surface of the gondola 4 is connected to the external gear 15. A gear 17 attached to the output shaft of the motor is in mesh with each other. Therefore, when the motor 16 is started, its rotation is transmitted to the rotary disk via the gear 17.15, causing it to rotate.

Further, 18a ill: a pair of opposing hydraulic cylinders for supporting reaction force extending radially from the rotary disk; 18b, a piston rod of each of these reaction force supporting cylinders 18a; 19, a piston rod of each of these piston rods 18b; This is a reaction force support fitting attached to the tip part via the bin 2Q so as to be able to pivot in the horizontal direction. Further, 21a is a hydraulic cylinder for peeling the lining layer which is attached to each of these reaction force support fittings 19 in a hanging state via a bottle 22, 211] is a piston rod of each of these peeling cylinders 2ia, and 23 is a hydraulic cylinder for each of these peeling cylinders 2ia. A lining layer peeling tool attached to the tip of the piston rod 21b, 24 is a peeling cylinder 21
a and the reaction force support fitting 19, each of these springs 24 is a cylinder biasing spring interposed between the peeling cylinder 21a
Therefore, the peeling tool 23 attached to the tip of the piston rod 21b is urged toward the inner circumferential surface of the chimney barrel 2.

Next, a method for removing a lining layer using such a chimney lining layer peeling and removing device will be described.

The gondola 4 is stopped at a predetermined height position in the chimney l, and the worker 8 riding on the gondola 4 operates the control panel 13 to control the piston rod 1 of each reaction force supporting cylinder 18a.
8b in the extension direction to press each reaction force support fitting 19 against the inner circumferential surface of the chimney barrel 2.

At this time, each of the peeling cylinders 21a1 and the peeling tool 23 attached to the tip of the piston rod 21b is pressed against the chimney barrel by the cylinder biasing spring 24.
The upper end of the lining layer 3 is still attached to the cylinder body. From this state, the piston rod 21b of each peeling cylinder 21a is operated in the extension direction to push down the peeling tool 23, thereby peeling off the lining layer 3 still attached to the chimney barrel 2.

After peeling M, the piston rod 21b of each peeling cylinder 21a is operated in the contraction direction, and each peeling tool 23
is raised, and the piston rods 18b of each reaction force support cylinder 18a are operated in the contraction direction to separate each reaction force support fitting 19 from the inner peripheral surface of the chimney barrel 2.

Next, the motor 16 is started, and the rotation is transmitted via the gears 17.15 to a rotating disk equipped with the gear 15 on the outer peripheral surface, and the rotation is transmitted to each reaction force supporting cylinder Lea provided on this rotating disk. , the piston rod 18b, each reaction force support fitting 19, each peeling cylinder 21a, the piston rod 21b, and each peeling tool 23 are horizontally rotated by a predetermined angle. Then, the same procedure as described above is repeated again to peel off the lining layer 3.

Problems to be Solved by the Invention In the conventional chimney lining layer peeling and removing device shown in FIG. Since the cylinder 18a is used to press it, for example, when the thickness of the lining layer 3 is about 50ax, the pressing force of the peeling cylinder 21a required to peel the lining layer is 2 to 3
Reaction force support fitting 1 to support this reaction force
The pressing force of the reaction force support cylinder 18a that presses 9 is approximately 10 tons, assuming that the friction coefficient is OJ. When the stress and deformation caused in the chimney barrel due to this pressing force of 10 tons are examined using the finite element method, the results are as follows in the case where the chimney barrel diameter is 6 mm and the plate thickness is 8 u.

Reaction force support fitting size Cylindrical outer surface stress Deformation amount (circumferential length x height) 2000x400 mm 14.1kg/force x'
61.0xm However, in order to achieve a stress level that does not cause plastic deformation in the chimney barrel, it is necessary to increase the size of the reaction force support fitting, which increases the weight of the lining layer peeling removal device. There is a problem.

Means for Solving the Problems In order to solve such conventional problems, the present invention provides a chimney lining layer peeling removal device that is suspended in a vertically movable manner inside a chimney barrel on which a lining layer is installed. A supported gondola, a turntable attached to a center post attached to the center of the gondola so as to be able to rotate around the center post, and a pair of reaction force support cylinders placed opposite each other on the turntable. and a reaction force support fitting that is attached to the tip of the piston rod of each of these reaction force support cylinders so as to be able to pivot in the horizontal direction and that can freely come into contact with the lining layer of the chimney barrel; a peeling cylinder disposed almost directly above each reaction force support fitting; a lining layer peeling tool attached to the tip of a piston rod of each of these peeling cylinders;
Each of these peeling tools is constructed with a biasing means for biasing the peeling tools in the direction of the inner circumferential surface of the chimney barrel.

According to the device for peeling and removing the chimney lining layer having such a structure, the reaction force support fitting that receives the reaction force when the lining layer is peeled is pressed against the lining layer of the chimney, while
The lining layer can be peeled off.

EXAMPLE A preferred embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a front view showing a state in which a chimney lining layer is peeled off by the chimney lining layer peeling and removal device according to this embodiment, and FIG. 2 is a plan view taken along the line ■-■ in FIG.

In these figures, the chimney l is composed of a chimney barrel 2 made of a steel plate and a lining NI3 that covers the inner circumferential surface of the chimney barrel 2. A hanging balance 10 suspended by a wire rope 6 has a pin 11 and a center post 12.
A gondola 4 is connected via a wire lobe 6.
By winding up or letting out the gondola 4, it is possible to raise and lower the gondola 4 into the chimney l.

In this case, although not shown in FIG. 1, the wire rope 6 is guided by a pulley 5 attached to the h end of the chimney barrel 2, as shown in FIG. .

A gear 30 is fixed to the center post 12 attached to the center of the gondola 4, and a turntable 31 is attached to the center post 12.
It is attached so that it can rotate freely around 2. In order to enable the turntable 31 to rotate, wheels 32 attached to the lower surface of the turntable 31 can run on circular rails 33 attached to the upper surface of the gondola 4.

Further, a turning motor 34 is attached to the turntable 31, and a gear 35 attached to the output shaft of the turning motor 34 meshes with a gear 30 fixed to the center post 12 described above. Therefore, when the turning motor 34 is started, the wheels 32 of the turntable 31 run on the circular rail 33, and the turntable 31 turns around the center post 12.

Further, a plurality of guides 36 are fixed on the turntable 31, and these guides 36k are connected to two moving guides 38a and a8b connected by a connecting beam 37. It can be moved by wheels 39 provided on the lower surface of the .

A pair of reaction force supporting hydraulic cylinders 40a are provided on each of these moving guides 38a, 38b in a facing relationship, and a lining layer peeling device is installed at the tip of the piston rod 40b of each reaction force supporting cylinder 40a. 41 is supported and fixed.

Each of these lining layer peeling devices 41 is attached to the tip of the piston rod 40b of each reaction force supporting cylinder 40a via a pin 42 so as to be able to pivot in the horizontal direction, and peels off the lining layer of the chimney barrel 2. 3 includes a reaction force support metal fitting 43 that can freely come into contact with 3. As clearly shown in FIG. 2, each reaction force support fitting 43 includes a base portion 43a attached by a pin 42, and a pair of base portions 43a that extend from this base portion 43a and abut against the lining layer 3 of the chimney barrel 2. Engagement portion 43b
It consists of

Each lining layer peeling device 41 also has a reaction force support fitting 4
Pin 4 on arm 44 overhanging to the top of 3.
A hydraulic cylinder 46a for peeling the lining layer is attached via a cylinder 5, and this peeling cylinder 46a is located almost directly above the reaction force support fitting 43. A lining layer peeling tool 47 is attached to the tip of the piston rod 46b of the peeling cylinder 46a.

A spring 48 for biasing the cylinder is interposed between the peeling cylinder 46g and the arm 44, and this spring 48 is attached to the peeling cylinder 46a1 and hence the peeling tool 47 attached to the tip of its piston rod 46b. is urged toward the inner circumferential surface of the chimney barrel 2.

As shown in FIG. 1, at the bottom of the gondola 4 with the handrail 49, there are at least three collision prevention rollers 50 in order to prevent collisions with the chimney barrel 2 when the gondola goes up and down. is installed.

Further, as shown in FIG. 2, a control panel 51 and a hydraulic unit 52 are mounted on the turntable 31 and can be operated by a worker (not shown).

Next, a method for removing a lining layer using such a chimney lining layer peeling and removing device will be described.

The gondola 4 is stopped at a predetermined height position in the chimney 1, and a worker riding on the gondola 4 operates the control panel 51 to control the piston rod 40 of each reaction force support cylinder 40a.
b is operated in the extension direction to press each reaction force support fitting 43 against the inner circumferential surface of the chimney barrel 2.

At this time, due to an error in the installation of each reaction force supporting cylinder 40a, an error in the extension of the piston rod 40b, and a force difference in the pressing, the center of the two sets of lining layer peeling devices 41 connected by the connecting beam 37. The deviation from the center of the gondola 4 is adjusted by moving the moving guides 38a and 38b within the guide 36 using wheels 39 provided on the lower surface thereof, so that no force is applied to the gondola 4 and the fj center post 12. It is said that it has been done.

Second, the peeling tool 47 attached to the tip of the piston rod 46b of the peeling cylinder 46a1 of each q inning layer peeling device 41 is still attached to the chimney barrel 2 by the cylinder biasing spring 48. The upper end of the attached lining layer 3 is directed toward the cylinder body side. From this state, the piston rod 46b of each peeling cylinder 46m is operated in the extension direction to push down the peeling tool 47, thereby peeling off the lining layer 3 still attached to the chimney barrel 2.

After peeling, the piston rod 46b of each peeling cylinder 46a is operated in the contraction direction to raise each peeling tool 47, and the piston rod 40b of each reaction force support cylinder 40a is operated in the contraction direction. , each reaction force support fitting 4
3 away from the inner peripheral surface of the chimney barrel 2.

Next, the motor 34 is started and the turntable 31 is rotated around the center post 12 by the gears 35 and 30, whereby each reaction force supporting cylinder 40a provided on the turntable 31 and its piston rod 4 are rotated.
0b, each reaction force support fitting 43, and each peeling cylinder 46
a, its piston rod 46b, and each peeling tool 47
horizontally by a predetermined angle. and,
Next, the same procedure as described above is repeated to peel off the lining layer 3.

Effects of the Invention As mentioned above, in the conventional lining layer peeling removal device, the reaction force support fitting that receives the reaction force (approximately 10 tons) when the lining layer is peeled is pressed against the surface of the chimney cylinder made of steel plate. However, in the present invention, since the reaction force support fitting is pressed against the lining layer surface, stress and deformation of the chimney barrel made of steel plate can be reduced.

By increasing the stress within a range that does not cause plastic deformation, the size of the reaction force support fitting can be reduced.

As an example, in the case where the chimney barrel diameter is 61φ, the plate thickness is 8xm, and the lining thickness is 5Oxs, the barrel stress and deformation are as follows.

Reaction force support fitting size Cylindrical outer surface stress Deformation amount (circumferential length x height) 2000X400111 3.6 to 9/fj['
11.8113!

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of the chimney lining layer peeling and removal device according to the present invention, Fig. 2 is a plan view taken along the line ■-■ in Fig. 1, and Figs. 3 and 4 are two different conventional examples. FIG. ■...Chimney, 2...Chimney barrel, 3...Lining layer, 4
...Gondola, 6..Wire rope, 12..Center post, 31..Turntable, 34..Swivel motor, 40a..Reaction force support cylinder, 40b..Piston rod, 41..Lining layer peeling. Device, 43...
Reaction force support fitting, 46a... Peeling cylinder, 46b
... Piston rod, 47. Lining layer peeling tool, 48. Cylinder biasing spring. Fig. 1 1: Large cross section 40a: Syringe for La L cable support 1 Fig. 2 J7 1: Most heavy air/34:8 daily motor 31 turn deep Fig. 3

Claims (1)

[Claims] A gondola is suspended and supported so that it can rise and fall inside the chimney barrel where a lining layer has been constructed, and a turntable is attached to a center post attached to the center of the gondola so as to be able to rotate around the center post. and,
A pair of reaction force supporting cylinders are installed opposite each other on the turntable, and each of these reaction force supporting cylinders is attached to the tip of the piston rod so as to be able to pivot in the horizontal direction, and the chimney barrel a reaction force support fitting that can freely come into contact with the lining layer, a peeling cylinder placed almost directly above each of these reaction force support metal fittings, and a peeling cylinder attached to the tip of the piston rod of each of these peeling cylinders. A device for peeling and removing a chimney lining layer, comprising a lining layer peeling tool and a biasing means for biasing each of these peeling tools toward the inner peripheral surface of the chimney barrel.