JP2016064463A - Device for and method of removing heat deterioration layer of heat-resistant coating film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for and a method of removing the heat deterioration layer of a heat-resistant coating film.SOLUTION: There are provided a device for and a method of peeling off and removing a heat deterioration layer 103 generated by exposure to high temperature of a heat-resistant coating film 102 formed on the surface of a metal base material 101. The device comprises a high-pressure water nozzle 12 for spraying a high-pressure jet water (water jet WJ) 11 to the heat deterioration layer 103, and a high-pressure water supply part 14 supplying a high-pressure water 13 to the nozzle 12. The high-pressure water nozzle 12 sprays the high-pressure jet water satisfying the following expressions (1), (2) and (3): (1) 50≤p≤300; (2) Q≥0.5; and (3) p≤-13.9Q+439 when defining the spray pressure (MPa) of the high-pressure jet water 11 as p, and the spray flow rate (L/min) thereof as Q.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus and method for removing a thermally deteriorated layer of a heat resistant coating film.

  For example, the surface of a metal base material, which is a structural material, for the purpose of protecting structural members from high-temperature exposure, such as a launch pad of a flying object such as a rocket, a launching device, or a flight deck exposed to high-temperature combustion gas such as an aircraft engine A heat-resistant heat-resistant paint is applied to the film to provide a heat-resistant coating film (heat-resistant coating film). The heat-resistant coating film is a heat-resistant heat-shielding paint (so-called ablator) with a thick coating in which an inorganic filler such as silica or calcium is dispersed in an organic material such as epoxy or phenol resin. When the heat-resistant coating film is exposed to a high temperature, the surface is carbonized, and a thermal insulation gas is ejected from the lower part to obtain a high heat insulating effect.

  Here, the heat-resistant coating film is exposed to a high temperature, and the carbonized portion becomes a thermally deteriorated layer (carbonized layer). For this reason, when the time when the heat-resistant coating film is exposed to a high temperature becomes long, a thermally deteriorated layer is formed, and the portion of the heat-resistant coating material (sound layer) decreases as the coating film burns and vaporizes.

  In order to maintain heat insulation, the heat-resistant coating film needs to keep the film thickness of the heat-resistant coating film at a predetermined thickness or more. Further, when the heat-resistant coating film is exposed to a high temperature, the surface is carbonized and becomes brittle, and the inorganic filler also accumulates on the surface and becomes a dust generation source. Therefore, when the heat-resistant coating film becomes thin, the heat-resistant paint is applied again. At this time, if a heat-degraded layer remains on the surface side of the heat-resistant coating film, the adhesive strength of the re-painted coating film when the heat-resistant paint is applied again decreases. After removing the carbonized layer, repaint to the specified thickness.

  Currently, for example, as a technique for removing a thermally deteriorated layer formed on a heat-resistant coating film of a rocket launch pad, a grinding method using a disk grinder is used. However, this grinding method using a disc grinder has various problems such as a low removal rate, a large amount of dust generation, and excessively shaving of the heat-resistant coating film. In particular, if the heat-resistant coating film is shaved too much and the sound layer of the heat-resistant coating film is shaved, the frequency of repainting work such as the number of repainting steps increases, which becomes a problem.

  Moreover, if it is a general thin coating film, the method of peeling off a coating film completely by a blast process, a water jet process, etc. for repainting is also proposed (refer patent document 1 and patent document 2).

JP 2004-196571 A JP-A-1-163359

  The total peeling process in Patent Documents 1 and 2 can increase the peeling process speed. However, since it is necessary for the blasting process to strike the abrasive on the heat-resistant coating film, the amount of dust generated is increased compared to the process using a disc grinder. Further, when, for example, dry ice that sublimates and disappears is used as the abrasive, the cost and availability of the abrasive become a problem.

  In addition, water jet processing is cheap because water is used, but generally under severe conditions that peel off the coating film, the heat-resistant coating film is excessively shaved, causing cracks in the healthy layer and repainting man-hours. There is a problem that the frequency of

  Therefore, when re-painting the heat-resistant coating film after exposure to high temperatures, the removal rate of the heat-degraded layer is faster than the heat-degraded layer, and only the heat-degraded layer can be removed. The current situation is that there is no technology that has a low frequency, generates a small amount of dust during processing, and has low costs such as consumables.

  In view of the above problems, the present invention provides an apparatus and method for removing a heat-degraded layer of a heat-resistant coating film, which is low in cost, has a high removal rate of the heat-degraded layer, and removes only the heat-degraded layer of the heat-resistant coating film. Let it be an issue.

The apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to the present invention for solving the above-described problems peels off a thermally deteriorated layer that has been thermally deteriorated when the heat-resistant coated film formed on the surface of the metal base material is exposed to a high temperature. A device for removing a heat-degraded layer of a heat-resistant coating film, comprising: a high-pressure water nozzle that injects high-pressure jet water into the heat-degraded layer; and a high-pressure water supply unit that supplies high-pressure water to the high-pressure water nozzle, The high pressure water nozzle has the following formulas (1), (2) and (3), where p is the injection pressure (MPa) of the high pressure jet water and Q is the injection flow rate (L / min) of the high pressure jet water. The above-described high-pressure water jet water that is satisfied is jetted.
50 ≦ p ≦ 300 (1)
Q ≧ 0.5 (2)
p ≦ −13.9Q + 439 (3)

  Further, the present invention is the above-described apparatus for removing a heat-degraded layer of a heat-resistant coating film, which covers the periphery of the tip side of the high-pressure water nozzle and has an opening on the heat-degraded layer side, and is provided on the cover. And a suction part for sucking together with water the exfoliated matter generated by the jet of high-pressure jet water.

  Moreover, this invention is a removal apparatus of the heat-deterioration layer of the heat-resistant coating film mentioned above, Comprising: The distance adjustment part which adjusts the construction distance provided in the said cover and the front-end | tip of the said high pressure nozzle and the said heat deterioration layer is provided. It is characterized by.

  Moreover, this invention is the removal apparatus of the heat-degraded layer of the heat-resistant coating film mentioned above, Comprising: The said cover is provided with the sliding part which contact | abuts the said heat-degraded layer in opening.

  Further, the present invention is a device for removing a heat-degraded layer of the heat-resistant coating film described above, having two or more high-pressure water nozzles, and a spray gun to which the high-pressure water is supplied from the high-pressure water supply unit, A pressure hose that is movable in conjunction with the operation of the spray gun and that supplies the high-pressure water supplied to the spray gun to each of the high-pressure water nozzles. A pair of arms that are rotatably supported via a moving part and that respectively support the high-pressure water nozzle, and a distance that is provided on each of the arms and that adjusts the tip of the high-pressure nozzle and the thermally deteriorated layer to a predetermined distance. It has an adjustment part, and the moving part which is provided in the said heat deterioration layer side of the said distance adjustment part, and moves the surface of the said heat deterioration layer is characterized by the above-mentioned.

  The present invention is also the above-described apparatus for removing a heat-degraded layer of a heat-resistant coating film, a universal joint provided in the rotating portion, and a barrel that is connected to the universal joint and that allows the front end side of the barrel to expand and contract. It is characterized by comprising a telescopic part.

  The present invention is also the above-described apparatus for removing a heat-degraded layer of a heat-resistant coating film, provided on the heat-degraded layer side of the rotating unit, and a monitoring unit for monitoring the peel surface of the heat-degraded layer; And a display unit for displaying monitoring information from the monitoring unit.

  The present invention is also the above-described apparatus for removing a thermally deteriorated layer of a heat-resistant coating film, wherein the relationship between the construction distance L between the tip of the high-pressure nozzle and the thermally deteriorated layer and the nozzle opening diameter d is L / d. ≦ 100 is satisfied.

In addition, the method for removing the heat-degraded layer of the heat-resistant coating film of the present invention is a method for removing the heat-degraded layer from which the heat-degraded layer formed on the surface of the metal base material is exposed to a high temperature to peel off the heat-degraded layer. A method for removing a layer, wherein the discharge pressure and the injection flow rate of high-pressure jet water from a high-pressure water nozzle that is injected into a thermally deteriorated layer satisfy the following conditions (1), (2), and (3): It is characterized by that.
50 ≦ p ≦ 300 (1)
Q ≧ 0.5 (2)
p ≦ −13.9Q + 439 (3)
Here, p is the injection pressure (MPa) of the high-pressure jet water, and Q is the injection flow rate (L / min) of the high-pressure jet water.

  Further, the present invention is a method for removing the heat-degraded layer of the heat-resistant coating film described above, wherein the relationship between the construction distance L between the high-pressure water nozzle and the heat-degraded layer and the nozzle opening diameter d is L / d ≦ 100 is satisfied.

  According to the present invention, it is possible to selectively remove the heat-degraded layer in which the heat-resistant coating film has been heat-degraded, and avoid peeling of the sound layer and occurrence of cracks. As a result, it is possible to reduce the paint and work man-hours required for repainting the heat-resistant coating film. Therefore, it is possible to remove only the heat-degraded layer of the heat-resistant coating film at a low cost with a fast removal rate of the heat-degraded layer.

FIG. 1 is a schematic diagram of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 1. FIG. 2 is an overall view showing an example of a system of a device for removing a thermally deteriorated layer of a heat-resistant coating film. FIG. 3 is a diagram illustrating before and after the launch of the heat-resistant coating applied to the rocket launch pad, and the removal and repainting of the thermally deteriorated layer. FIG. 4 is a diagram showing the relationship between the injection flow rate (L / min) of high-pressure jet water and the injection pressure (MPa). FIG. 5 is a schematic diagram of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 2. FIG. 6 is a schematic diagram of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 3. FIG. 7 is a schematic view of an apparatus for removing a thermally deteriorated layer of another heat-resistant coating film according to Example 3. FIG. 8 is a schematic view of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 4. FIG. 9 is a schematic diagram of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 5. FIG. 10 is a schematic view of a device for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 6. FIG. 11 is a schematic diagram of an apparatus for removing a heat-degraded layer from a heat-resistant coating film provided with a control device that controls a device for removing the heat-degraded layer from a heat-resistant film. FIG. 12 is a schematic diagram of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 7.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

FIG. 1 is a schematic diagram of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 1. As shown in FIG. 1, the member to be processed is a heat-degraded layer 103 in which a heat-resistant coating film 102 is formed on the surface of a base material 101, and the surface of the heat-resistant coating film 102 is exposed to a high temperature and thermally deteriorated. . The heat-degraded layer removing device 10A for the heat-resistant coating film according to this embodiment is a device for removing the heat-degraded layer of the heat-resistant coating film that peels off the heat-degraded layer 103 formed on the surface of the heat-resistant coating film 102. The removing device 10 </ b> A includes a high pressure water nozzle 12, a high pressure water supply unit 14, and a pressure hose 15. The high-pressure water nozzle 12 injects high-pressure jet water (water jet: WJ) 11 onto the thermally deteriorated layer 103. The high pressure water supply unit 14 supplies high pressure water 13 to the high pressure water nozzle 12. The pressure hose 15 is a flexible tube having a high pressure resistance, and connects the high pressure water supply unit 14 and the high pressure water nozzle 12 to supply the high pressure water 13 supplied from the high pressure water supply unit 14 to the high pressure water nozzle 12. The removing device 10 </ b> A arranges the high-pressure water nozzle 12 in a state facing the heat deterioration layer 103, and sends the high-pressure water 13 from the high-pressure water supply unit 14 to the high-pressure water nozzle 12 through the pressure hose 15. The high-pressure water nozzle 12 injects the high-pressure water 13 supplied via the pressure-resistant hose 15 toward the thermal deterioration layer 103 facing the high-pressure water nozzle 12. In the removing device 10A, when the injection pressure (MPa) of the high-pressure jet water 11 is p and the injection flow rate (L / min) of the high-pressure jet water 11 is Q, Q and p are the following formulas (1) and ( High-pressure jet water that satisfies the conditions of 2) and formula (3) is jetted toward the thermally deteriorated layer 103.
50 ≦ p ≦ 300 (1)
Q ≧ 0.5 (2)
p ≦ −13.9Q + 439 (3)

  Next, the removal apparatus 10A will be described in more detail with reference to FIG. FIG. 2 is an overall view showing an example of a system of a device for removing a thermally deteriorated layer of a heat-resistant coating film. As shown in FIG. 2, the removing device 10 </ b> A includes a spray gun 24 in addition to the above-described pressurized water nozzle 12, high-pressure water supply unit 14, and pressure-resistant hose 15. The spray gun 24 is provided with a high-pressure water nozzle 12 at the tip and is connected to a pressure hose 15. The spray gun 24 is supplied with the high pressure water 13 from the pressure hose 15 and supplies the supplied high pressure water 13 to the high pressure water nozzle 12. The spray gun 24 includes a trigger 24 a for operating whether or not the high-pressure jet water 11 is sprayed from the tip of the high-pressure water nozzle 12, and a grip 24 b that is gripped when the user holds the spray gun 24. ing. Whether the user adjusts the position and orientation of the high pressure water nozzle 12 by moving the spray gun 24 while grasping the grip 24b, and operates the trigger 24a to inject the high pressure jet water 11 from the high pressure water nozzle 12. Control whether or not.

  Next, the high pressure water supply unit 14 supplies the high pressure water 13 to the high pressure water nozzle 12 via the pressure hose 15 and the spray gun 24. The high-pressure water supply unit 14 opens the valve 26 in conjunction with the operation of the water tank 22 filled with the working water 21, the pump 23 that pumps the working water 21 from the water tank 22 as the high-pressure water 13, and the trigger 24a. A valve box 27 for feeding the high-pressure water 13 to the spray gun 24 is provided. One end of the pressure hose 15 is connected to the valve box 27, and the other end is connected to the injection gun 24 having the high pressure water nozzle 12. The removal device 10A is movable to the work place by mounting each part of the high-pressure water supply unit 14 on, for example, a pump car that holds a predetermined amount of working water 21.

The apparatus 10A for removing a heat-degraded layer of a heat-resistant coating film according to this embodiment operates as follows.
The removing device 10A drives the pump 23 and introduces the working water 21 from the water tank 22 into the valve box 27 as high-pressure water 13 with a predetermined pressure. In the valve box 27, the flow path resistance and the like are adjusted by the valve 26. The high-pressure water 13 that has passed through the valve box 27 is adjusted to a predetermined flow rate and supplied to the injection gun 24 via the pressure hose 15. When the trigger 24 a is operated, the removing device 10 ejects the high-pressure jet water 11 having a predetermined pressure and a predetermined injection flow rate from the tip of the high-pressure water nozzle 12. The removing device 10 </ b> A peels and removes the thermally deteriorated layer 103 when the jetted high-pressure jet water 11 reaches the thermally deteriorated layer 103.

  Hereinafter, as an example, the change before and after the launch of the heat-resistant coating film applied to the rocket launch pad, the removal of the thermally deteriorated layer, and the repainting process will be described as an example. FIG. 3 is a diagram illustrating before and after the launch of the heat-resistant coating applied to the rocket launch pad, and the removal and repainting of the thermally deteriorated layer. In addition, although FIG. 3 demonstrated before and after the launch of a rocket, what is necessary is just the operation | movement to which a heat-resistant coating film is exposed to high temperature.

  First, before launching the rocket, a heat-resistant coating film 102 in which a heat-resistant coating film is applied to the metal base material 101, which is a rocket launch pad, with a predetermined thickness is formed. All layers of the applied heat-resistant coating film 102 are sound layers. Here, the sound layer is a layer in which the cohesive force of the heat-resistant coating film is in a state of a predetermined value or more, and the heat insulating performance and strength function as a heat-resistant coating film. The cohesive force of the healthy layer is 3 MPa or more as an example. On the other hand, since the thermally deteriorated layer 103 is a fragile layer, the cohesive force is less than 3 MPa as an example.

  After launching the rocket, a part of the heat-resistant coating film 102 is exposed to a high temperature to evaporate and disappear 104, and a part of the surface layer of the remaining heat-resistant coating film 102 that has evaporated and disappeared is deteriorated by heat. ) 103 is formed, for example, about several millimeters. Since this thermally deteriorated layer 103 is carbonized, its surface is powdery and its cohesive strength is less than 3 MPa.

  By removing the thermally deteriorated layer 103, the peeling layer 105 including the thermally deteriorated layer 103 is removed (chipped). That is, the peeling layer 105 is chipped. Thereafter, the heat-resistant paint is repainted to form a heat-resistant coating film 102A so as to have a prescribed constant thickness, and is prepared for the next launch of the rocket.

  In the removal process of the heat-degraded layer by the conventional disc grinder, there are cases where the heat-resistant coating film 102 and the metal base material 101 that can still be used are ground. As a result, when the heat resistant paint was repainted, it was necessary to apply several layers of the heat resistant coating film 102 to the specified thickness.

Therefore, in the present invention, the high-pressure jet water 11 discharged from the high-pressure water nozzle 12 is set to the conditions in the range shown in FIG. 4 and the range shown below, and the heat-degraded layer (carbonized layer) of the heat-resistant coating film 102 is formed by the high-pressure jet water 11. The removal is performed selectively and efficiently.
FIG. 4 is a diagram showing the relationship between the injection flow rate (L / min) of high-pressure jet water and the injection pressure (MPa). By making the application range of the shaded portion shown in FIG. 4, it is possible to avoid peeling of the sound heat-resistant coating film 102 and occurrence of cracks in the sound heat-resistant coating film 102.

  Here, as described above, the treatment conditions are such that the injection pressure of the high-pressure jet water 11 is 50 ≦ p ≦ 300 (1), Q ≧ 0.5 (2), p ≦ −13.9Q + 439・ ・ Satisfy (3).

  Next, it will be described with reference to Table 1 that the heat-degraded layer removal treatment of the coating film is suitable within the shaded area shown in FIG.

As shown in FIG. 4, Test Example 1 is a case where the pressure is 300 MPa and the amount of water is 10 L / min, Test Example 2 is a case where the pressure is 50 MPa and the amount of water is 28 L / min, and Test Example 3 is a case where the pressure is 150 MPa. The water amount is 0.5 L / min, Test Example 4 is the case where the pressure is 50 MPa and the water amount is 0.5 L / min, and Test Example 5 is the case where the pressure is 150 MPa and the water amount is 5 L / min. (In FIG. 4, ○ mark).
Comparative Example 1 is a case where a conventional disc grinder is used, and Comparative Example 2 is a case where the pressure is 250 MPa and the amount of water is 20 L / min (marked with * in FIG. 4).

As shown in Table 1, in Test Example 1-5, the removal rate of degradation layer is 15~29m ² / h, in Comparative Example 1 (0.9m ² / h) removal rate than is much It has improved.
Moreover, the amount of peeling (thickness of the removed layer) of the sound layer was as small as 0.1 mm or less, no crack was generated in the sound layer, and the construction was good.

In contrast, in Comparative Example 1, the removal rate was as low as 0.9 m ² / h, and the removal amount of the sound layer was as thick as 2 mm or more (a thickness of the removed layer) of the sound layer.

Further, in Comparative Example 2, since the high-pressure jet water does not satisfy the formula (3) and the removability of the thermally deteriorated layer 103 is too strong, the amount of peeling of the sound layer (the thickness of the removed layer) is also 0. It was as large as 5 mm, cracks in the healthy layer were also generated, and the construction was poor.
When the pressure (p) was less than 50 MPa, it was impossible to remove the thermally deteriorated layer 103 (X in FIG. 4).

  Moreover, even when this condition is satisfied, it is preferable that the pressure is lower and the injection flow rate is smaller than the range of Test Example 4, Test Example 3, or Test Example 5. The injection condition depends on the degree of deterioration of the thermally deteriorated layer 103, but it is more preferable to set the vicinity of the condition of Test Example 4 because, for example, the pump capacity can be reduced and the apparatus configuration can be made compact.

Moreover, it is more preferable that the construction distance (L) between the surface of the thermally deteriorated layer 103 as the construction surface and the nozzle tip of the high-pressure water nozzle 12 is represented by the following formula (4).
Construction distance (L) / Nozzle opening diameter (d) ≦ 100 (4)
This is because when the construction distance (L) / nozzle opening diameter (d) is 100 or less, the removability of the thermally deteriorated layer 103 is good, but the construction distance (L) / nozzle opening diameter (d)> 100. Then, as the construction distance (L) is increased, the removability of the thermally deteriorated layer 103 by the high-pressure jet water 11 is lowered, which is not preferable.

  When the opening diameter (d) of the nozzle of the high-pressure water nozzle 12 is 0.2 mm, for example, it is preferable that the construction distance (L) is 20 mm or less.

Since the injection flow rate of the high-pressure water jet water 11 is determined by the opening diameter (d) of the high-pressure water nozzle 12 and the injection pressure (MPa), an appropriate nozzle opening diameter (d) is selected from the pump capacity so as to obtain a desired flow rate. Select according to the following formula (5).
Q (theoretical flow rate L / min) = (d / η) ² × 2.1 × √P (5)
Here, d = nozzle opening diameter (mm), P = injection pressure (MPa), and η = nozzle coefficient (nozzle specific value: about 1.0 to 1.4).

  In the high-pressure jet water 11, for example, if an injection flow rate of 0.8 L / min is required at an injection pressure of 150 MPa, the high-pressure water nozzle 12 having an opening diameter of 0.2 mm is selected. The nozzle coefficient was 1.13.

As described above, according to the heat-degraded layer removing device 10A for the heat-resistant coating film according to the present embodiment, the heat-degraded layer 103 in which the heat-resistant coating film 102 has been thermally deteriorated can be selectively removed, Peeling and cracking can be avoided. As a result, the paint and work man-hours required for repainting the heat-resistant coating film 102 can be reduced. Therefore, it is possible to remove only the heat-degraded layer 103 of the heat-resistant coating film 102 at a low cost and with a high removal rate of the heat-degraded layer 103.
In addition, the workability and work environment are greatly improved as compared with the case of the disk grinder processing that is conventionally performed, which contributes to a significant reduction in processing time.

  In addition, since the injection condition of the high-pressure jet water 11 is set as a predetermined condition, as in Comparative Example 2, the injection of the high-pressure jet water 11 becomes strong, causing cracks in the healthy layer, Can be avoided.

  Although water smoke is generated in the work, the amount of dust generated can be greatly reduced as compared with the disk grinder process, so that the risk of adverse effects on peripheral devices can be reduced and workability can be greatly improved.

Next, an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 2 of the present invention will be described with reference to FIG. FIG. 5 is a schematic diagram of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 2. In addition, about the member similar to Example 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 5, the heat-degraded layer removing device 10B of the heat-resistant coating film according to the present embodiment covers the periphery of the tip of the high-pressure water nozzle 12 in addition to each part of the removing device 10A of the first embodiment, A cover 31 having an opening 31a is provided on the deteriorated layer 103 side. The removing device 10B is provided with a suction unit 33 in the cover 31 for sucking the separated matter 32 generated by the injection of the high-pressure jet water 11 through the passage 31b together with water.

The removal apparatus 10 </ b> B can prevent the high-pressure jet water 11 and the exfoliated matter 32 to be sprayed from being scattered around by installing the cover 31. The removing device 10B can also adjust the distance from the high-pressure water nozzle 12 and the injection angle of the high-pressure jet water 11 by pressing and fixing the opening 31a of the cover 31 against the surface of the thermally deteriorated layer 103.
Furthermore, the removal device 10B includes the suction unit 33, and thereby can collect water and the separated matter 32 retained in the cover 31 by suction and suppress leakage to the work place.
As a result, the thermally deteriorated layer 103 is efficiently removed while collecting the water and the separated thermally deteriorated layer 103.

The removal device 10B for the heat-degraded layer of the heat-resistant coating film according to this example operates as follows.
The tip of the high-pressure water nozzle 12 covered with the cover 31 is made to face the surface of the heat deterioration layer 103, and the distance between the nozzle tip of the high-pressure water nozzle 12 and the heat deterioration layer 103 is set to a predetermined distance (L). Next, high-pressure jet water 11 is jetted from the opening of the high-pressure water nozzle 12, and the thermally deteriorated layer 103 is peeled off by the jet force of the high-pressure jet water 11. The peeled material 32 peeled off from the thermally deteriorated layer 103 by the high-pressure jet water 11 is sucked by the suction part 33 together with water.

According to the present embodiment, in addition to the operations and effects shown in the first embodiment, by installing the cover 31, it is possible to prevent scattering of dust and water smoke.
Further, it is possible to perform a peeling operation even indoors where cleanliness is required.

Moreover, the integration of the cover 31 and the high-pressure water nozzle 12 makes it possible to keep the construction distance (L) between the surface to be treated and the tip of the nozzle and the jet angle of the high-pressure jet water 11 constant, thereby eliminating processing variations by the operator. can do.
Further, by connecting the collection system of the suction part 33 attached to the cover 31, the peripheral cleaning after work can be simplified.

Next, an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 3 of the present invention will be described with reference to FIGS. FIG. 6 is a schematic diagram of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 3. FIG. 7 is a schematic view of an apparatus for removing a thermally deteriorated layer of another heat-resistant coating film according to Example 3. In addition, about the member similar to Example 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 6, the heat-degraded layer removing device 10 </ b> C of the heat-resistant coating film according to this example is similar to the heat-degrading layer removing device 10 </ b> B of the heat-resistant coating film of Example 2 and is further provided in the opening 31 a of the cover 31. A sliding portion 35 such as a bristle brush or a roller slidable along is provided.
By providing the sliding portion 35 such as the bristle brush, the sliding portion 35 moves while being in contact with the surface of the heat deterioration layer 103 at the time of construction, so that the construction work can be easily moved.

Further, as shown in FIG. 7, the heat-degraded layer removing device 10 </ b> D of another heat-resistant coating film according to the present embodiment is further provided with a distance adjusting unit 36 that can adjust the height of the high-pressure water nozzle 12 on the side surface of the cover 31. Is provided.
By providing the distance adjusting unit 36, the construction distance L of the high-pressure water nozzle 12 can be adjusted. For example, by adjusting to a predetermined distance according to the degree of embrittlement of the thermally deteriorated layer 103, the injection of the high-pressure jet water 11 is performed. The distance can be adjusted.

Next, an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 4 of the present invention will be described with reference to FIG. FIG. 8 is a schematic view of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 4. In addition, about the member similar to Example 1 thru | or 3, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 8, the apparatus 10E for removing the heat-degraded layer of the heat-resistant coating film according to the present embodiment is provided on the tip side of the gun 42 to which the high-pressure water 13 is supplied and the barrel 42 of the gun 41, A pair of arms 44, 44 that are rotatably supported via a rotation unit 43, and high-pressure water nozzles 12, 12 that are provided on the arms 44, 44 and inject the high-pressure jet water 11 into the thermal degradation layer 103, respectively. , Provided on each of these arms 12, 12, for adjusting the construction distance (L) of the high-pressure water nozzle 12 to a predetermined distance, and provided on the thermal deterioration layer 103 side of the distance adjusting unit 45. The pressure resistance of supplying the supplied high-pressure water 13 to the high-pressure water nozzle 12 from a part of the barrel in conjunction with the operation of the roller 41, which is a moving part that moves on the surface of the thermally deteriorated layer 103, and the trigger 41a of the spray gun 41. A hose 47 Ri, when thermal degradation layer 103 is curved, by adjusting the rotation degree of the rotation unit 43, is performed from the high-pressure water nozzles 12 jetting high pressure jet water 11 along the curved surface.

  The rotating portion 43 provided at the tip of the barrel 42 of the spray gun 41 is configured to freely rotate the pair of arms 44, 44. When the metal base material 101 is a curved surface, the heat deterioration layer 103 is also a curved surface. Also, this curved surface can be adjusted so that the distance from the tip of the high-pressure water nozzle 12 is constant.

  Further, the high-pressure water nozzles 12 and 12 respectively installed on the arms 44 and 44 are movable along the axial direction of the arm 44 so that the position of the high-pressure water nozzle 12 in the arm axial direction can be adjusted. The adjustment of the arm axial direction and the adjustment of the rotating portion 43 make it possible to prepare for construction of the high-pressure water nozzle 12 corresponding to any curved surface shape.

  Moreover, since the distance adjustment part 45 is provided, the predetermined construction distance L between the high-pressure water nozzle 12 and the construction surface can be arbitrarily adjusted.

  Further, the roller 46 provided on the heat deterioration layer 103 side of the distance adjusting unit 45 facilitates movement on the surface of the heat deterioration layer 103.

When the high-pressure jet water 11 is sprayed on the heat-degraded layer 103 and peeled off, a reaction force due to the spray is applied. Therefore, skill is required for processing at a predetermined distance.
By using the spray gun 41 provided with a pair of high-pressure water nozzles 12 and 12 as in the present embodiment, the high-pressure jet water 11 is sprayed while maintaining a predetermined distance while being pressed against the surface of the thermally deteriorated layer 103 with the grip 41b. Is possible. At this time, since the spray gun 41 can be pressed and slid against the heat-degraded layer 103 side, fatigue during continuous work is reduced.

  In addition, when a special nozzle corresponding to the curved surface of the thermally deteriorated layer 103 is prepared and changed, it takes time to change the nozzle. In this embodiment, the rotating unit 43 is adjusted. Since it is only necessary to do this, the work efficiency can be improved.

  In the present embodiment, two high-pressure water nozzles 12 are installed, but the present invention is not limited to this, and the number may be increased as necessary.

The apparatus 10E for removing a heat-degraded layer of a heat-resistant coating film according to this example operates as follows.
When the thermally deteriorated layer 103 is a flat surface, the rotating portion 43 is adjusted, and the arms 44 and 44 are adjusted so as to be parallel to the thermally deteriorated layer 103.
Next, the tip of the high-pressure water nozzle 12 is opposed to the surface of the coating film deterioration layer 103, and the distance adjustment unit 45 adjusts the distance between the nozzle tip and the heat deterioration layer to be a predetermined distance (L).
Next, the trigger 41 a is operated to inject the high-pressure jet water 11 from the opening of the high-pressure water nozzle 12, and the thermally deteriorated layer 103 is peeled off by the injection force of the high-pressure jet water 11.
At this time, since the spray gun 41 can be pressed against the thermally deteriorated layer 103 side by the grip 41b of the spray gun 41 and can be peeled off while being moved by the roller 46, fatigue during continuous operation is reduced.

When the heat deterioration layer 103 is a curved surface, the rotation unit 43 is adjusted, and the arms 44 and 44 are rotated and adjusted along with the curved surface of the heat deterioration layer 103.
Next, the tip of the high-pressure water nozzle 12 is opposed to the surface of the thermally deteriorated layer 103, and the distance adjusting unit 45 adjusts the distance between the nozzle tip and the thermally deteriorated layer 103 to be a predetermined distance (L).
Next, the trigger 41 a is operated to inject the high-pressure jet water 11 from the opening of the high-pressure water nozzle 12, and the thermally deteriorated layer 103 is peeled off by the injection force of the high-pressure jet water 11.

  Further, in the present embodiment, by installing the cover 31 having the suction portion 33 as shown in the second embodiment, the water and the separated matter 32 staying in the cover 31 are collected by the suction portion 33 and are returned to the work place. Leakage can be suppressed. As a result, the thermally deteriorated layer 103 is efficiently removed while collecting the water and the separated thermally deteriorated layer.

Next, an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 5 of the present invention will be described with reference to FIG. FIG. 9 is a schematic diagram of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 5. In addition, about the member similar to Examples 1-4, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 9, the heat-degraded layer removing device 10 </ b> F of the heat-resistant coating film according to the present example is further provided in the rotating unit 43 in the heat-degrading layer removing device 10 </ b> E of the heat-resistant coated film of Example 4. A universal joint 51 and a barrel expansion / contraction section 52 connected to the universal joint 51 and capable of extending and contracting the distal end side of the barrel 42 are provided.

  As a result, even when working at a high place, desired adjustment is possible by operating the universal joint 51 and the barrel expansion / contraction part 52, and in addition to the functions and effects shown in the fourth embodiment, The range of removal is widened, the number of installation places for scaffolding during high-altitude work can be reduced, and the work period and cost can be reduced.

Next, an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 6 of the present invention will be described with reference to FIG. FIG. 10 is a schematic view of a device for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 6. In addition, about the member similar to Example 1 thru | or 5, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 10, the heat-degraded layer removing device 10G for the heat-resistant coating film according to the present embodiment includes, in addition to the respective parts of the heat-degrading layer removing device 10F for the heat-resistant coating film according to the fifth embodiment, a rotating unit. 43, provided on the side of the thermally deteriorated layer 103, and provided with a monitoring unit 61 for monitoring the peeling surface of the thermally deteriorated layer 103 and a display unit 62 for displaying monitoring information from the monitoring unit 61.

The monitoring unit 61 includes a camera 61a and a drainage cover 61b. The monitoring unit 61 may further include a light that illuminates the field of view of the camera 61a.
The camera 61 a is provided on the heat deterioration layer 103 side of the rotating unit 43 and monitors the peeling surface of the heat deterioration layer 103. A drainage cover 61b that covers the periphery of the camera 61a is provided around the camera 61a.

  The monitoring unit 61 monitors the peeling surface of the thermally deteriorated layer 103 by photographing the construction area with the camera 61a. In addition, as the monitoring unit 61, by covering the periphery of the camera 61a with the water protection cover 61b, it is possible to prevent the water 61 and the peeling surface of the thermal degradation layer 103 facing the camera 61a from being blocked by water droplets or water. The surface can be monitored by the camera 61a.

Usually, water smoke is generated during the peeling operation of the heat-degraded layer by the high-pressure jet water 11, so that it is difficult to judge the processing state of the coating film unless the apparatus is stopped or the location of the high-pressure water nozzle 12 is shifted. .
On the other hand, since the monitoring unit 61 of the camera 61a having the water shielding cover 61b is provided in the heat-degraded layer removing device 10F of the heat-resistant coating film of the present embodiment, the coating film processing status of the high-pressure water spraying part. The operator can work while confirming in real time, and the work efficiency is improved.
Thereby, the variation in construction by an operator can be eliminated.

  Although the removal apparatus 10F can monitor the peeling surface of the heat degradation layer 103 by displaying the image image | photographed with the monitoring part 61 on the display part 62 as it is, it is not limited to this. The removal device 10F may analyze the image captured by the monitoring unit 61, determine the color tone of the release layer, and monitor the release surface of the thermally deteriorated layer 103 based on the color tone. Here, since the thermally deteriorated layer 103 is carbonized, for example, the color is brown to black, and the release layer that has peeled up to the healthy layer is white. Therefore, the removal device 10F may determine the peeling state based on the difference in color tone of the acquired image.

FIG. 11 is a schematic diagram of an apparatus for removing a heat-degraded layer from a heat-resistant coating film provided with a control device that controls a device for removing the heat-degraded layer from a heat-resistant film. As shown in FIG. 11, a controller 65 including an image analysis unit that analyzes information of the camera 61 a is installed in the heat-degraded layer removing device 10 </ b> G of the heat-resistant coating film according to the present embodiment.
Then, during the removal of thermal degradation layer 103 monitors the work surface by the camera 61a, it sends the image signals S ₁ to the display unit 62, the operator displays on the monitor screen 62a.
Alternatively, the image signal S ₁ may be sent to the image analysis unit of the control device 65 for analysis, and the grayscale signal S ₂ obtained by the analysis may be displayed on the monitor screen 62a.
Further, based on the obtained density signal S ₂ , a control signal S ₃ such as (1) water pressure / flow rate control instruction and (2) ON / OFF control instruction of the high-pressure jet water 11 is sent to the controller 65. May be sent to the high-pressure water supply unit 14 for execution.

  Also, the image of the camera 61a is processed by the control device 65, the removal state of the heat-degraded layer is constantly monitored, the control device 65 determines the degree of removal of the coating film, and the water amount and water pressure are automatically adjusted as necessary. Thus, it is possible to prevent a uniform finish that does not depend on the operator and excessive shaving of the coating film.

Next, an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 7 of the present invention will be described with reference to FIG. FIG. 12 is a schematic diagram of an apparatus for removing a thermally deteriorated layer of a heat-resistant coating film according to Example 7. In addition, about the member similar to Example 1 thru | or 6, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
The apparatus 10H for removing a heat-degraded layer of a heat-resistant coating film according to the present embodiment has a plurality of (three in this embodiment) high-pressure water nozzles 12 supported by a support portion 71 in a cover 31, and each high-pressure water nozzle. 12 is supplied with high-pressure water 13 from a high-pressure water supply unit 14.
In the present embodiment, automatic steering is enabled by an automatic piloting device (not shown) provided with moving means that can move within a construction range in advance.
A monitoring unit 61 is provided between the high-pressure water nozzles 12, and imaging information thereof is sent to a control device 65 having an information analysis unit and displayed on a monitor 62 a of the display unit 62.

  In this embodiment, three high-pressure water nozzles 12 are installed, but the present invention is not limited to this, and the number may be increased or decreased as necessary.

The apparatus 10H for removing a thermally deteriorated layer of a heat-resistant coating film according to the present embodiment operates as follows.
The high-pressure water 13 having a predetermined pressure from the high-pressure water supply unit 14 is introduced into each high-pressure water nozzle 12.
The construction distance L between the high-pressure water nozzle 12 and the construction surface is adjusted to a predetermined distance according to, for example, the degree of embrittlement of the thermally deteriorated layer 103, and the high-pressure jet water 11 is heated under the desired conditions of jetting the high-pressure jet water 11. The spray is sprayed onto the deteriorated layer 103, and a predetermined range of peeling is started by automatic control at a constant speed and a constant water pressure.

During the peeling operation, the monitoring unit 61 displays surface image information on the display unit 62.
During the removal of the thermally deteriorated layer 103, the work surface may be monitored by the monitoring unit 61, and the image signal S ₁ may be sent to the display unit 62 and displayed on the display unit 62.
Alternatively, the image signal S ₁ may be sent and analyzed by the image analysis unit of the control device 65, and the gray signal S ₂ may be displayed on the display unit 62.
Further, the control device 65 creates a water pressure / flow rate control instruction, an ON / OFF control instruction for the high-pressure jet water 11 based on the density signal S ₂ , and instructs the high-pressure water supply unit 14. May be.
Further, if necessary, an instruction may be sent to the distance adjusting unit 36 to adjust the construction distance (L) between the high-pressure water nozzle 12 and the thermally deteriorated layer 103.

  Furthermore, when performing image analysis, check the chromaticity information and position information of the work situation at any time, analyze the presence or absence of peeling by color change, and if the processing is insufficient depending on the degree of deterioration The color tone may be determined, and the peeling process may be performed again based on the position information.

  Thereby, for example, when heat-resistant coating is applied to the surface of the deck of a ship over a wide range, when the surface is thermally deteriorated due to use, the wide heat-degraded layer can be peeled off by automatic steering. As a result, the manual peeling operation by the worker is eliminated, and the efficiency of the work can be greatly increased.

10A-10H Removal device for heat-degraded layer of heat-resistant coating film 11 High-pressure jet water (water jet: WJ)
DESCRIPTION OF SYMBOLS 12 High pressure water nozzle 13 High pressure water 14 High pressure water supply part 15 Pressure | voltage resistant hose 21 Working water 22 Water tank 23 Pump 24 Injection gun 24a Trigger 24b Grip 26 Valve 27 Valve box 31 Cover 31a Opening 31b Passage 32 Exfoliation object 33 Suction part 35 Sliding Unit 36 distance adjusting unit 41 spray gun 42 barrel 43 rotating unit 44 arm 45 distance adjusting unit 46 roller 47 pressure hose 51 universal joint 52 barrel expanding / contracting unit 61 monitoring unit 61a camera 61b drainage cover 62 display unit 62a monitor screen 65 control device 71 Supporting part 101 Metal base material 102, 102A Heat-resistant coating film 103 Thermally deteriorated layer 104 Evaporation disappearance 105 Peeling layer

Apparatus for removing thermal degradation layer of the heat-resistant coating of the present invention for solving the above problems, peeling the thermal degradation layer heat coating was being 曝 to high temperatures and thermal degradation which is formed on the surface of the metal base material A device for removing a heat-degraded layer of a heat-resistant coating film, comprising: a high-pressure water nozzle that injects high-pressure jet water into the heat-degraded layer; and a high-pressure water supply unit that supplies high-pressure water to the high-pressure water nozzle, The high pressure water nozzle has the following formulas (1), (2) and (3), where p is the injection pressure (MPa) of the high pressure jet water and Q is the injection flow rate (L / min) of the high pressure jet water. Injecting the satisfactory high-pressure water jet water, and having two or more high-pressure water nozzles, the injection gun to which the high-pressure water is supplied from the high-pressure water supply unit, and moving in conjunction with the operation of the injection gun High pressure water supplied to the spray gun is A pressure hose to be supplied to the water nozzle, provided on the distal end side of the spray gun, rotatably supported via a rotating portion, and provided on each of the arms and supporting the high pressure water nozzle A distance adjusting unit that adjusts the tip of the high-pressure nozzle and the heat deterioration layer to a predetermined distance; and a moving unit that is provided on the heat deterioration layer side of the distance adjustment unit and moves on the surface of the heat deterioration layer. It is characterized by having .
50 ≦ p ≦ 300 (1)
Q ≧ 0.5 (2)
p ≦ −13.9Q + 439 (3)

The present invention is also a device for removing a heat-degraded layer of a heat-resistant coating film as described above, comprising a pair of arms that rotatably support the high-pressure water nozzle on the tip side of the spray gun. .

In addition, the method for removing the heat-degraded layer of the heat-resistant coating film of the present invention is a method for removing the heat-degraded layer from which the heat-degraded layer formed on the surface of the metal base material is exposed to a high temperature to peel off the heat-degraded layer. A method for removing a layer, wherein the discharge pressure and the injection flow rate of high-pressure jet water from two or more high-pressure water nozzles that are injected into the thermally deteriorated layer are expressed by the following equations (1), (2), and (3): ) Is satisfied.
50 ≦ p ≦ 300 (1)
Q ≧ 0.5 (2)
p ≦ −13.9Q + 439 (3)
Here, p is the injection pressure (MPa) of the high-pressure jet water, and Q is the injection flow rate (L / min) of the high-pressure jet water.

Claims (10)

A device for removing a heat-degraded layer of a heat-resistant coating film that peels off a heat-degraded layer that has been heat-degraded when the heat-resistant coating film formed on the surface of the metal matrix is exposed to a high temperature,
A high-pressure water nozzle that injects high-pressure jet water into the thermally deteriorated layer, and a high-pressure water supply unit that supplies high-pressure water to the high-pressure water nozzle,
In the high pressure water nozzle, when the injection pressure (MPa) of the high pressure jet water is p and the injection flow rate (L / min) of the high pressure jet water is Q, the conditions of the following formulas (1), (2) and (3) An apparatus for removing a heat-degraded layer of a heat-resistant coating film, characterized in that the high-pressure water jet water that satisfies the requirements is injected.
50 ≦ p ≦ 300 (1)
Q ≧ 0.5 (2)
p ≦ −13.9Q + 439 (3) In claim 1,
Covering the periphery of the tip side of the high-pressure water nozzle and having an opening on the thermally deteriorated layer side;
An apparatus for removing a heat-degraded layer from a heat-resistant coating film, comprising: a suction portion that is provided on the cover and sucks together with water a peeled material generated by jetting high-pressure jet water. In claim 2,
An apparatus for removing a heat-degraded layer from a heat-resistant coating film, comprising a distance adjusting unit that is provided on the cover and adjusts a construction distance between a tip of the high-pressure nozzle and the heat-degraded layer. In claim 2 or 3,
The said cover is provided with the sliding part which contact | abuts the said heat deterioration layer in opening, The removal apparatus of the heat deterioration layer of the heat-resistant coating film characterized by the above-mentioned. In claim 1 or 2,
Having two or more high-pressure water nozzles;
A spray gun to which the high-pressure water is supplied from the high-pressure water supply unit;
A pressure hose that is movable in conjunction with the operation of the spray gun, and that supplies the high-pressure water supplied to the spray gun to each of the high-pressure water nozzles,
A pair of arms that are provided on the tip side of the spray gun, are rotatably supported via a rotation part, and respectively support the high-pressure water nozzle;
A distance adjusting unit that is provided on each of the arms and adjusts the tip of the high-pressure nozzle and the thermally deteriorated layer to a predetermined distance;
An apparatus for removing a heat-degraded layer from a heat-resistant coating film, comprising: a moving unit that is provided on the heat-degraded layer side of the distance adjusting unit and moves on a surface of the heat-degraded layer. In claim 5,
A universal joint provided in the rotating part;
An apparatus for removing a thermally deteriorated layer from a heat-resistant coating film, comprising: a barrel expansion / contraction part connected to the universal joint and capable of expanding and contracting a distal end side of the barrel. In claim 5 or 6,
A monitoring unit that is provided on the side of the thermally deteriorated layer of the rotating unit and that monitors a peel surface of the thermally deteriorated layer;
And a display unit for displaying monitoring information from the monitoring unit. In any one of Claims 1 thru | or 7,
The apparatus for removing a thermally deteriorated layer from a heat-resistant coating film, wherein a relationship between a construction distance L between the tip of the high pressure nozzle and the thermally deteriorated layer and a nozzle opening diameter d satisfies L / d ≦ 100. A method for removing a heat-degraded layer of a heat-resistant coating film that peels off a heat-degraded layer that has been heat-degraded when the heat-resistant coating film formed on the surface of the metal matrix is exposed to a high temperature,
The heat-resistant coating film characterized in that the discharge pressure and flow rate of high-pressure jet water from the high-pressure water nozzle sprayed onto the thermally deteriorated layer satisfy the conditions of the following formulas (1), (2) and (3) Of removing the heat-degraded layer.
50 ≦ p ≦ 300 (1)
Q ≧ 0.5 (2)
p ≦ −13.9Q + 439 (3)
Here, p is the injection pressure (MPa) of the high-pressure jet water, and Q is the injection flow rate (L / min) of the high-pressure jet water. In claim 9,
A method for removing a thermally deteriorated layer of a heat-resistant coating film, wherein a relationship between a construction distance L between the high-pressure water nozzle and the thermally deteriorated layer and a nozzle opening diameter d satisfies L / d ≦ 100.

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