JPH06264266A - Method for repairing glass-lined device and device therefor - Google Patents

Abstract

PURPOSE:To rapidly and precisely repair a glass-lined device by forming a minute glass repairing layer equivalent in performance to the normal lining glass around the damaged part in the minute damaged part generated in the lining layer of a glass-lined device or at the boundary between the damaged part and a repairing piece. CONSTITUTION:A repairing glass 34 having the same composition and thickness as a lining glass layer 32 is placed on the damaged part 33 generated in the layer 32 coating a base metal 31. A laser beam generated from a laser 48 is transmitted to a laser beam irradiator 37 through an optical fiber 50 to irradiate the damaged part 33, and the minute boundary between the glass 34 and the glass lining layer 32 is softened and fused.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the industrial fields such as chemical industry and food industry, and is exposed to a severe corrosive environment. The present invention relates to a repairing method and a repairing device for fine local damages formed in a lining glass layer that covers the surface of enamel products and the like.

[0002]

2. Description of the Related Art Conventionally, as a method for repairing a damaged portion formed in a lining glass layer, (1) a cap, bolt or the like made of tantalum metal having excellent corrosion resistance is used, and a gap between the cap, bolt or the like and the lining glass surface With Teflon packing (US Pat. No. 2,631,360); (2) Organic corrosion-resistant resin such as epoxy resin, adhesive is applied to the damaged part to cure; (3) Hastelloy, etc. Corrosion resistant metal of the above method is applied to the damaged part by bath spraying (Japanese Patent Publication No. 58-25740); (4) Method of applying low melting point lead glass or vanadate glass powder to the damaged part, heating and softening fusion (JP-A-59-
102835); (5) A method of repairing using a silicon alkoxide-based coating agent and an epoxy resin (JP-A-63-76887); and (6) A mixture of an inorganic fine powder and an organic metal compound such as a metal alkoxide. Has been proposed, such as a method of forming a glass repair layer by applying the above-mentioned to the damaged part and then solidifying it by reaction at a temperature below the transition point of the lining glass (JP-A-2-240282).

Further, in order to carry out the local heat treatment of the repairing agent in the narrow space inside the glass lining equipment, conventionally, a commercially available mantle heater, panel heater or the like has been usually used. Further, in relation to the above repair method (6), the present applicant has made use of the heat radiation from the far-infrared heating element to make it possible to carry out a suitable reaction solidification of the repair agent (JP-A-3-2386). ) Is proposed.

[0004]

Generally, in order to repair a locally damaged portion of a lining glass layer at a site where glass lining equipment is installed, (i) no large-scale repairing equipment / device is required. , (Ii) There is no risk of thermal or mechanical damage to the normal lining glass layer in the vicinity of the damaged part during repair work, and (iii) Repair according to the location, shape and area of the damaged part. It is required to be possible.

Further, as a good repair glass layer recognized in the art, (iv) the repair glass layer has no cracks, pinholes, etc., (v) the chemical resistance of the repair glass layer,
Excellent penetration resistance, no toxicity, (vi) Good adhesion between the base metal of the glass lining equipment and the repair glass layer, and (vii) Thermal cycle when the glass lining equipment is in operation after repair. It is premised that it can withstand and meets the requirements of.

Considering the above-mentioned conditions, the prior art
(1) is difficult to apply when the damaged part has a complicated shape or has a large area.In addition, the penetration of the contents of the glass lining equipment due to deterioration of the Teflon packing.
There is a mixing problem. Further, the method (2) is limited in heat resistance, has poor solvent resistance, and causes diffusion of water vapor in the material, so that its application is limited. Also,
In the method (3), the repair layer prepared by thermal spraying becomes porous, and large-scale thermal spraying equipment is required. And
In method (4), there is a risk that glass components such as lead and vanadium, which promote the lowering of the melting point of the glass, may be toxic, and the repair glass layer construction temperature may reach up to about 600 ° C. There is a risk of thermal destruction of the normal lining glass layer in the vicinity. Furthermore, according to method (5), organic substances and carbon components contained in the glass material remain in the repair layer, and when epoxy resin is used in combination, the thermal cycle during operation of the glass lining equipment after repair is I have problems such as being intolerable. Furthermore, method (6) is the most ideal repair method among the listed prior art, but in order to obtain a repaired glass layer of the desired thickness, the work of coating and heating glass materials is repeated. Therefore, there is a drawback that the construction time required for constructing the repair glass layer becomes long, and even if the above-mentioned repair device is used, the application of the repair agent and the repair location It has been necessary to repeat various operations such as installation and operation of the device, which burdens the user.

[0007]

The present invention has been made in view of the problems pointed out in the above-mentioned series of conventional techniques, and the gist thereof is as follows: (a) Lining glass The damaged portion of the layer is washed, (b) a repair glass having a shape suitable for compensating the damaged portion prepared by the softening flow method is placed on the damaged portion, and (c)
Irradiating the repair glass with a laser beam generated from a laser irradiation device, and softening and fusing the repair glass to the damaged portion, the damage occurring in the lining glass layer of the glass lining equipment including the step Part repair method; and repair glass prepared by the softening flow method, which has an appropriate shape for filling the damaged part of the lining glass layer, is irradiated with a laser beam from a three-dimensionally movable irradiation device for repair. A device for softening and fusing a working glass to a damaged part, which has the following structure, that is, a laser beam irradiation device movably mounted in a vertical direction and a longitudinal direction of the guide bar, and a repair device for repairing one end of the guide bar. A repair device main body, which is movably held in a horizontal direction with respect to the main body, and includes a drive device for moving the guide bar
And a repairing device for a broken portion of a lining glass layer of a glass lining device, characterized by including a magnet means for fixing the repairing device main body to a lining glass surface of the glass lining device.

The "softening flow method" used to prepare the glass for repair used in the repairing method of the present invention means heating the glass material to a softening temperature (for example, 500 to 900 ° C.) or higher, , The technique of putting glass into a desired shape by putting it in a water-candy state.

Lasers usable in the repair method of the present invention include solid (YAG) lasers, CO ₂ (carbon dioxide) lasers, excimer lasers, alexandrite lasers, etc., and the wavelength of each laser or the repair glass material. Can be appropriately selected and used according to the absorption rate of.

Further, as a mechanism for realizing the three-dimensional operation of the irradiation device constituting the repairing device of the present invention, for example, an organic XY plotter such as an office XY plotter and an organic two-dimensional moving means are used. A mechanism consisting of specific combinations can be applied. In addition, by connecting this mechanism to a device that is placed outside the repair device body and that controls the three-dimensional operation of the irradiation device and a device that controls the laser beam transmission amount to the irradiation device, the lining glass layer by the laser beam is connected. Damaged parts can be repaired remotely.

Hereinafter, the repairing method of the present invention will be described based on examples with reference to the accompanying drawings. The disclosure of these examples shows one embodiment of the present invention, and In interpreting the scope, no limitation should be added by the following disclosure.

[0012]

EXAMPLES Example 1: Repair of a substantially circular damaged portion A method of repairing a lining glass layer having a substantially circular damaged portion will be described with reference to FIG.

First, an SS41 steel plate 1 (thickness: 2 mm, 100 mm square) corresponding to a base metal of a glass lining equipment was coated with a lining glass layer 2 having a thickness of 1.5 mm by a softening flow method, and then, in the center thereof. The approximately circular broken portion 3 having a diameter of about 0.5 mm was formed by a dielectric breakdown method.

Next, a repair glass 4 having the same composition as the lining glass layer 2 around the broken portion 3 (the silicic acid component stipulated in JIS R4201 standard occupies 60% by weight or more) and having substantially the same thickness 4 Was separately prepared by a softening flow method, pulverized and processed into particles of about 1 mmφ.

Then, the glass 4 is placed on the damaged portion 3 and 4
00 milliwatt YAG laser generator (TYPE LAY-822A;
5kW; manufactured by Toshiba Corporation) The laser beam 7 transmitted from the main body to the irradiation device 6 via the optical fiber 5 and passing through the lens provided in the device 6 and being focused to about 50 μmφ, the glass placed on the damaged portion 3 It was irradiated toward No. 4 for about 1 second.

As a result, the fine boundary within 1 mm in diameter between the glass 4 and the surrounding lining glass layer 2 was softened and fused, and the repair of the damaged portion was completed.

Example 2 Repair of Linearly Damaged Part A method of repairing a lining glass layer having a linearly damaged part
This will be described with reference to FIG.

First, a SS41 steel plate 11 (thickness 2 mm, 100 mm square) corresponding to the base metal of the glass lining equipment is coated with a lining glass layer 12 having a thickness of 1.5 mm by the softening flow method, and then the glass layer 12 is formed. A linear breakage 13 having a width of about 0.4 mm and a length of 50 mm was formed in the center by thermal shock.

Next, the lining glass layer around the damaged portion 13
A repair glass 14 having the same composition as that of 12 (the silicic acid component stipulated in JIS R4201 standard occupies 60% by weight or more) and having almost the same thickness is separately prepared by a softening flow method and crushed. It was processed into particles of about 1 mmφ.

Then, the above-mentioned steel plate-glass with the damaged portion 13 is placed on an XYZ stage, and irradiated from an optical fiber 15 from the main body of a 400 milliwatt YAG laser generator (TYPE LAY-822A; 5kW; Toshiba Corp.). The laser beam 17 transmitted to the device 16 and passed through the lens provided in the device 16 and focused to about 50 μmφ is broken into a linear portion of about 0.4 mmφ.
The glass 14 placed on 13 was irradiated at an operating speed of 10 mm / min. As a result, the fine boundary within 1 mm in diameter between the glass 14 and the surrounding lining glass layer 12 was softened and fused, and the repair of the damaged portion was completed.

Example 3 Repair of Bulk Damaged Part (Part 1) A method for repairing a lining glass layer having a bulky damaged part
This will be described with reference to FIG.

First, an SS41 steel plate 21 (thickness: 2 mm, 100 mm square) corresponding to the base metal of a glass lining equipment is coated with a lining glass layer 22 having a thickness of 1.5 mm by a softening flow method, and then a glass layer 22 is formed. A broken portion 23 of the lining glass layer having a diameter of about 40 mm was formed in the center by mechanical polishing.

Next, the lining glass layer around the damaged portion 23
A repair glass plate 24 having the same composition as that of 22 (silicic acid component stipulated in JIS R4201 standard occupies 60% by weight or more) and having almost the same thickness is separately prepared by the softening flow method, and the damaged portion is formed.
Processed to have almost the same shape and dimensions as 23.

Then, the glass plate 24 is placed on the damaged portion 23, and then the boundary 28 between the glass plate 24 and the damaged portion 23 is the same as the lining glass layer 22 (60% by weight of the silicic acid component defined in the JIS R4201 standard). Glass particles 29 having a composition of about 1 mm and prepared by a softening flow method and crushed were placed. Next, a 2 watt YAG laser generator (TYPE
LAY-822A; 5kW; manufactured by Toshiba Corp.) Laser beam 27 transmitted from the main body to the irradiation device 26 via the optical fiber 25, passed through the lens provided in the device 26 and focused to about 50 μmφ.
Was irradiated toward the glass particles 29 at an operating speed of 10 mm / min. As a result, the fine boundary portion 28 having a diameter of 1 mm or less between the glass plate 24 and the surrounding lining glass layer 22 was softened and fused, and the repair of the damaged portion was completed.

Example 4: Repair of lumpy damaged part (Part 2) Lining glass with a width of about 100 cm ² generated in the bottom mirror part of a reactor (capacity 14 m ³ ) made of a closed glass lining specified by JIS R4201 Iron rust, oil and dust were removed from the damaged layer, and the remaining lining glass pieces around the damaged area were removed by polishing.

Next, the shape and size of the damaged portion were molded to form a mold. And the same as lining glass (JI
A glass plate having a composition in which the silicic acid component defined in the SR4201 standard occupies 60% by weight or more) was prepared by a softening flow method, and a repair glass plate was processed and produced according to the mold.

Similarly, the same as the lining glass layer (JISR
Glass particles of about 1 mmφ having a composition of which the silicic acid component specified in the 4201 standard occupies 60% by weight or more) were prepared by a softening flow method and then pulverized.

Then, the glass plate is placed on the damaged portion,
Furthermore, after placing the glass particles at the boundary between the glass plate and the lining glass layer, a laser generator (TYPE LAY-822A; 5kW) placed outside the glass lining reactor and capable of adjusting the output from 0 to 5 watts. Made by Toshiba Corporation)
It is transmitted from the main body via the optical fiber to the irradiation device in the reactor, and passes through the lens provided in the irradiation device to about 50 μm.
A laser beam focused at φ was irradiated toward the glass particles at a speed of 50 mm / sec. This gives the diameter between the glass plate and the lining glass layer.
The fine boundary within 0.5 mm was softened and fused, and the repair was completed.

Next, in Examples 5 and 6 below,
A preferred embodiment of the repair device of the present invention is disclosed.

Embodiment 5: Usage of the apparatus of the present invention (No. 1) The usage of the repairing apparatus of the present invention will be described with reference to FIGS. 4 and 5.

In addition to removing iron rust, oil and dust from the damaged portion 34 formed in the lining glass layer 32 of the body of the sealed glass-lined reactor (capacity 50 m ³ ) specified in JIS R 4201, The lining glass pieces around the portion 34 were removed by polishing to prepare an exposed portion (4 cm × 5 cm) of the iron cloth 31.

Next, a repair glass piece 33 having a coefficient of thermal expansion and corrosion resistance equivalent to that of the lining glass layer 32 was prepared by the softening flow method, and a mixture of this and water was sprayed onto the damaged portion 34 by air spray. Sprayed and dried in a dryer.

An electric motor of a driving device 38, one end of which is placed on the rail 40 and the other end of which is supported movably in the horizontal direction of the repair device main body 41 and electrically connected to the three-dimensional movement control device 37. The YAG laser beam irradiator (made by TEM) 43 attached to the guide bar 42 that moves by the power transmitted from the 39 to the wire 36 via the pulley 35
The rare earth magnet 44 of the repair device main body 41 was fixed to the lining glass layer 32 in the vicinity of the damaged portion 34 by suction so that the repair device main body 41 was opposed to.

The power transmitted to the wire 46 from the electric motor 47, which is movably supported in the vertical and longitudinal directions of the guide bar 42 and electrically connected to the three-dimensional movement control device 37, via the pulley 45. A laser beam emitted from a laser beam generation device 48 and controlled by a laser beam output control device 49 was connected to a laser beam irradiation device 43 that moved by means of the optical fiber 50 so that the laser beam could be transmitted.

Further, the three-dimensional movement control device 37 and the personal computer 51 were electrically connected so that the movement of the drive device 38 could be controlled, and further connected to the illuminated television camera 52 adjacent to the laser beam irradiation device 43. By using the television monitor 53, the output of the laser beam and the moving range of the driving device 38 can be adjusted remotely (for example, outside the glass lining device).

Then, the moving condition of the three-dimensional movement control device 37 is set to 20 mm in consideration of the shape and size of the damaged portion 34.
/ Sec, the moving pitch was 0.6 mm.

The laser beam irradiating device 43 irradiates the laser beam 54 of 5 watts while moving it three-dimensionally according to preset control conditions to soften the boundary portion between the repair glass piece 33 and the lining glass layer 32. After fusion, the damaged part 34 was repaired.

Embodiment 6: Usage of the apparatus of the present invention (No. 2) Another usage of the repairing apparatus of the present invention will be described with reference to FIGS. 6 and 7.

First, iron rust, oil and dust are removed from the broken portion 64 formed in the lining glass layer 62 of the bottom mirror portion of the closed glass lining reactor (capacity 14 m ³ ) specified in JIS R 4201. At the same time, the lining glass layer 62 around the damaged part was removed by polishing, and the exposed part of the iron cloth 61 (5 cm x 6 cm)
Was produced.

Next, the shape and size of the damaged portion 64 formed in the bottom mirror portion of the glass lining reactor were molded, and the same as the lining glass (JIS R 4201 standard A repair glass piece 63 prepared by processing a glass plate having a composition of 60% by weight or more of the specified silicic acid component) by a softening flow method was temporarily fixed to a damaged portion 64 with an adhesive tape.

An electric motor of a drive device 68, one end of which is placed on the rail 70 and the other end of which is movably supported in the horizontal direction of the repair device main body 71 and electrically connected to the three-dimensional movement control device 67. The laser beam irradiation device 73 attached to the guide bar 72, which is moved by the power transmitted from the wire 69 to the wire 66 via the pulley 65, has the magnet 74 so that the laser beam irradiation device 73 faces the damaged portion 64 and the lining glass layer around the damaged portion 64. The repairing device main body 71 was fixed by adsorbing it on 62.

The guide bar 72 is supported so as to be movable in the vertical and longitudinal directions, and the three-dimensional movement control device 67 is provided.
The electric motor 80 electrically connected to the electric motor 80 moves the electric power transmitted to the wire 79 via the pulley 78.
As shown in FIG. 6, a laser beam irradiation device 73 having a mirror member 77 and a condenser lens 81 built-in was sent from a mini carbon dioxide gas laser beam generator (manufactured by Thinrad) 76 under the control of a laser beam output controller 75. Laser beam
After passing through a mirror member (Dyqui-lock mirror) 77 and a condenser lens 81 placed at a corner of the repair device main body 71 and one end of the guide bar 72, a laser beam 82 narrowed down by the lens 81 is applied to the damaged portion 64. .

The laser beam irradiation device 73 is electrically connected by the three-dimensional movement control device 67 and the personal computer 83 so that the movement of the drive device 68 can be controlled. Further, the laser beam irradiation device 73 has a built-in television camera with illumination. By using a television monitor 85 connected to 84, the output of the laser beam and the moving range of the drive device 68 can be adjusted remotely (for example, outside the glass lining equipment).

Then, the moving condition of the three-dimensional movement control device 67 is set to a moving speed of 10 mm in consideration of the shape and size of the damaged portion 64.
/ Sec, the moving pitch was 0.4 mm.

The laser beam irradiating device 73 irradiates the laser beam 82 of 3 watts while moving it three-dimensionally according to preset control conditions to soften the boundary portion between the repair glass piece 63 and the lining glass layer 62. After fusion, the damaged part 64 was repaired.

Example 7: Performance Test of Repaired Glass Layer The repaired glass layer and the normal lining glass layer prepared by the method of Example 1 were subjected to the following respective tests.

(1) Commercial Frequency Dielectric Breakdown Test Based on the AC voltage insulation test (JEC-0201) based on the standard of the Institute of Electrical Engineers of Japan / Electrical Standards Research Committee (published by The Denki Shoin) Then, the minimum voltage (kV / mm) required to destroy the test body was measured.

(2) Thermal Shock Test Japanese Industrial Standards for Industrial Glass Lining Equipment (JIS R 4201) (Published by Japan Standards Association: Revised February 1, 1977)
First, prepare water with a water temperature of 20 ° C or less and a water amount of 4 liters or more, heat the test body for 20 minutes in a thermostat 100 ° C higher than the water temperature, and immediately put it in water, remove the test body from the water, and perform the test. The minimum temperature required for cracking and peeling of the body surface was determined.

(3) Adhesion Test Japanese Industrial Standards for Industrial Glass Lining Equipment (JIS R 4201) (Published by Japan Standards Association, revised on February 1, 1977)
According to the above, first, with the glass layer facing upward, the height was sequentially changed from the glass layer surface, the steel ball (200 g) was allowed to fall naturally, and the minimum impact energy (Nm) required to break the glass layer was determined. .

The results of each of these tests are shown in Table 1 below.

[0051]

[Table 1]

As is clear from the results shown in Table 1, the repair glass layer applied by the repairing method of the present invention is comparable in performance to the normal lining glass layer around the damaged part. It was found to have material properties.

[0053]

[Effects of the Invention] That is, according to the present invention, there is provided a method and a repairing device for accurately and promptly repairing even a minute broken portion generated in a lining glass layer of a glass lining equipment, whereby a lining glass layer after repairing is provided. The surface condition and the glass performance of the glass not only improve the efficiency of repair work, such as obtaining the one equivalent to that of the normal lining glass layer, but also exhibit various effects such as extending the life of glass lining products in general.

[Brief description of drawings]

FIG. 1 is a view showing a cross section of an embodiment of a repair method of the present invention.

FIG. 2 is a perspective view showing another embodiment of the repair method of the present invention.

FIG. 3 is a view showing a cross section of another embodiment of the repair method of the present invention.

FIG. 4 is a plan view of an embodiment of the repair device of the present invention.

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

FIG. 6 is a plan view of another embodiment of the repair device of the present invention.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Steel plate 2 ... Lining glass layer 3 ... Almost circular damage part 4 ... Repair glass 6 ... Irradiation device 7 ... Laser beam 31 ... Base metal 32 ... Lining glass layer 33 ... Repair glass 34 ... Damaged part 38 ... Driving device 41 … Main body of repair device 43… Laser beam irradiation device 44… Magnet 42… Guide bar

Claims (6)

[Claims] 1. A method for repairing a damaged portion in a lining glass layer of a glass lining device, comprising the steps of:
That is, (a) clean the damaged part of the lining glass layer,
(b) A repair glass having a shape suitable for compensating for the damaged portion prepared by the softening flow method is placed on the damaged portion,
And (c) irradiating the repair glass with a laser beam generated from a laser irradiation device, and softening and fusing the repair glass to the damaged portion, the method for local repair of glass lining equipment, comprising: . 2. The method for local repair of glass lining equipment according to claim 1, wherein the repair glass is glass having a coefficient of thermal expansion and chemical corrosion resistance equivalent to those of the glass constituting the lining glass layer. 3. The method for local repair of glass lining equipment according to claim 1, wherein the damaged portion is a locally damaged portion having a diameter of 1 mm or less. 4. The method for locally repairing glass lining equipment according to claim 1, wherein the damaged portion is a linear damaged portion having a width of 1 mm or less. 5. A guide bar equipped with a laser beam irradiation device, a repair device main body equipped with a drive device for moving the guide bar by movably holding one end of the guide bar, and the device main body of a glass lining device. Includes magnet means for fixing to the lining glass surface, the laser beam irradiation device is movably mounted in the vertical direction and the longitudinal direction of the guide bar, and both ends of the guide bar are in the horizontal direction of the device body. A repair device for a damaged lining glass layer of a glass lining device, which is movably held. 6. The repair device according to claim 5, wherein the laser beam irradiation device further includes a mirror member and a lens member.