JP2011179059A - Device and method for repairing flange sheet surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent powder material not contributed for film deposition from being diffused in the air by collecting the powder material (the raw material powder) not contributed to the film deposition at a repair site. <P>SOLUTION: A flange sheet surface repairing device includes a gun for depositing a film 18 on a surface 2 of a substrate 7 by blowing powder material at high speed together with combustion flame or inert gas, and a bulkhead 12 arranged to surround the circumference of the gun. Most of powder material not contributed to the forming of the film 18 is caused to flow in a first space 24, and powder material not contributed to the forming of the film 18 and leaked to the side of a third bulkhead 23 from a fore end 22c of a second bulkhead 22, and the atmospheric air present outside the third bulkhead 23 are caused to flow in a second space 26. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  For example, as shown in FIG. 1, the present invention is provided on the flange sheet surfaces 1 and 2 of the heat exchanger, the chemical reaction vessel, or the pressure vessel, and the flange sheet surface 1 along the circumferential direction. The present invention relates to a flange sheet surface repair device and a flange sheet surface repair method that are used to repair pitting corrosion that occurs in (a dead water area of) a circumferential groove 3 to be accommodated.

  Conventionally, in the heat exchanger, the chemical reaction vessel, or the flange sheet surfaces 1 and 2 of the pressure vessel, or the flange sheet surface 1 shown in FIG. The generated pitting corrosion is generally repaired by welding. However, repairs by welding are only temporary, and even after repairs, pitting corrosion occurs immediately in the same place, and it is in an ugly state.

  On the other hand, for such pitting corrosion, for example, a high speed frame (High Velocity Oxide Fuel: hereinafter referred to as “HVOF”) spray gun disclosed in Patent Document 1 is used to form a substrate on the flange sheet surface. It is known that when a film is formed, it is good (effective).

JP 2003-183805 A

  However, when the HVOF spray gun disclosed in Patent Document 1 is used at a site where a heat exchanger, a chemical reaction vessel, or a pressure vessel is opened for repair, it is released from the HVOF spray gun and contributes to film formation. The powder material (raw material powder) that did not exist will diffuse into the atmosphere, which is not preferable.

  The present invention has been made in view of the above circumstances. In the repair site, a powder material (raw material powder) that has not contributed to film formation can be recovered, and a powder material that has not contributed to film formation can be recovered. An object of the present invention is to provide a flange sheet surface repair device and a flange sheet surface repair method that can prevent diffusion into the atmosphere.

The present invention employs the following means in order to solve the above problems.
The flange sheet surface repair device according to the present invention is disposed so as to surround the periphery of the gun by blowing a powder material at a high speed together with a combustion flame or an inert gas to form a film on the surface of the substrate. A flange sheet surface repair device comprising a partition, wherein the partition is a first partition disposed outside the gun, a second partition disposed outside the first partition, and A third partition disposed outside the second partition, and a first exhaust recovery system is provided in a first space formed between the first partition and the second partition. A second exhaust recovery system is connected to the second space formed between the second partition wall and the third partition wall, and connected to the first space. So that most of the powder material that did not contribute to the formation of the film flows The shortest distance between the tip of the first partition and the substrate, the shortest distance between the tip of the second partition and the substrate, and the suction force of the first exhaust recovery system are set, and the second space In addition, the powder material that did not contribute to the formation of the film leaked from the tip of the second partition wall to the third partition side, and the air existing outside the third partition wall flowed in. The shortest distance between the tip of the third partition wall and the substrate and the suction force of the second exhaust recovery system are set.

According to the flange sheet surface repair device of the present invention, most of the powder material that has not contributed to the formation of the film flows into the first space, and the third space enters the second space from the tip of the second partition wall. The powder material that did not contribute to the formation of the film leaked to the side of the partition wall and the atmosphere existing outside the third partition wall flowed, and the powder material did not leak to the outside of the third partition wall ( Does not flow out).
As a result, the powder material (raw material powder) that did not contribute to film formation can be collected at the repair site, and the powder material that did not contribute to film formation can be prevented from diffusing into the atmosphere. .

  In the flange sheet surface repair device, the first partition, the second partition, and the third partition are each disposed on a cylindrical portion and a tip side of the cylindrical portion, and taper toward the tip. It is more preferable that a truncated cone portion is provided.

According to such a flange sheet surface repair device, as shown in FIG. 2, the low-speed powder material which is located on the outside in the radial direction and is not effective (not contributing to the film formation) is a truncated cone of the first partition wall. It collides with the inner peripheral surface of the part and accumulates on the inner peripheral surface of the truncated cone part of the first partition wall.
As a result, only the powder material having a high speed effective for film formation reaches the surface of the base material in the radial direction, and a good film is efficiently formed on the surface of the base material. And the film forming quality can be improved.

  In the flange sheet surface repair device, the partition is disposed inside the first partition, and is disposed on a cylindrical portion and a distal end side of the cylindrical portion, and is tapered toward the distal end. A fourth partition wall having a truncated cone portion made of a porous material or a mesh-like material having a large number of holes through which the first partition wall can pass, and between the first partition wall and the fourth partition wall It is more preferable that a third exhaust recovery system is connected to the third space formed in the above.

According to such a flange sheet surface repairing apparatus, as shown in FIG. 2, the low-powder powder material that is located on the radially outer side and is not effective (not contributing to the film formation) is a truncated cone of the fourth partition wall. It passes through the section and flows into the third space and is recovered by the third exhaust recovery system.
As a result, only the powder material having a high speed effective for film formation reaches the surface of the base material in the radial direction, and a good film is efficiently formed on the surface of the base material. And the film forming quality can be improved.
Further, after the truncated cone part of the fourth partition wall is clogged, the powder material is deposited on the inner peripheral surface of the truncated cone part of the fourth partition wall, and can be used continuously for a long time. And a good continuous film can be formed on the surface of the substrate.

  In the flange sheet surface repair device, a porous material having a large number of holes that have elasticity and allow the powder material to enter the inner peripheral surface of the truncated cone part constituting the fourth partition wall. The produced rope is spirally arranged along the inner peripheral surface, and the rope moves from the reduced diameter side to the enlarged diameter side while turning along the inner peripheral surface by a rope moving mechanism. It is more preferable that it is configured to be movable.

  According to such a flange sheet surface repair device, the powder material that is not effective (not contributing) to the film formation is attached to the rope and then discharged out of the partition wall together with the rope. The frustum portion can be prevented from being clogged, can be used continuously for a long time, and a good continuous film can be formed on the surface of the substrate.

  A flange sheet surface repair method according to the present invention is a flange sheet surface repair method in which a powder material is blown out at a high speed together with a combustion flame or an inert gas to form a film on the flange sheet surface. This is done using a surface repair device.

According to the flange sheet surface repair method according to the present invention, the powder material that has leaked into the second space from the tip of the second partition wall to the third partition wall side and has not contributed to the formation of the film, and The air existing outside the third partition wall flows in, and the powder material does not leak out (does not flow out) outside the third partition wall.
As a result, the powder material (raw material powder) that did not contribute to film formation can be collected at the repair site, and the powder material that did not contribute to film formation can be prevented from diffusing into the atmosphere. .

  According to the flange sheet surface repair device and the flange sheet surface repair method according to the present invention, the powder material (raw material powder) that did not contribute to film formation can be recovered at the repair site, and does not contribute to film formation. It is possible to prevent the powder material from being diffused into the atmosphere.

It is sectional drawing of the flange sheet surface to which the flange sheet surface repair apparatus and flange sheet surface repair method which concern on this invention are applied. It is a block diagram which shows the outline of the flange sheet surface repair apparatus which concerns on this invention. It is a block diagram which shows the principal part of the flange sheet surface repair apparatus which concerns on 1st Embodiment of this invention. It is a figure for demonstrating a problem in case the shortest distance of the front-end | tip of a truncated-cone part of a 1st partition and a flange sheet surface is large. It is a figure for demonstrating a problem in case the shortest distance of the front-end | tip of a truncated-cone part of a 1st partition and a flange sheet surface is small. It is a block diagram which shows the principal part of the flange sheet surface repair apparatus which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the principal part of the flange sheet surface repair apparatus which concerns on 3rd Embodiment of this invention. It is a conceptual diagram which shows the principal part of the flange sheet surface repair apparatus which concerns on 4th Embodiment of this invention. It is sectional drawing which shows the principal part of the flange sheet surface repair apparatus which concerns on 4th Embodiment of this invention.

  Hereinafter, a flange sheet surface repair device and a flange sheet surface repair method according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a sectional view of a flange sheet surface to which the flange sheet surface repair device and the flange sheet surface repair method according to the present invention are applied. FIG. 2 is a configuration diagram schematically showing the flange sheet surface repair device according to the present invention. FIG. 4 is a configuration diagram showing a main part of the flange sheet surface repair device according to the present embodiment, and FIG. 4 is for explaining a problem when the shortest distance between the tip of the truncated cone part of the first partition wall and the flange sheet surface is large. FIG. 5 is a diagram for explaining a problem when the shortest distance between the tip of the truncated cone portion of the first partition wall and the flange sheet surface is small.

The flange sheet surface repair device and the flange sheet surface repair method according to the present invention include, for example, a heat exchanger, a chemical reaction vessel, or flange sheet surfaces 1 and 2 of a pressure vessel as shown in FIG. It is used to repair pitting corrosion that occurs in the circumferential groove 3 provided in the circumferential direction (dead water area).
In addition, the code | symbols 4 and 5 in FIG. 1 are a volt | bolt and a nut which respectively fasten one flange part (container flange) 6 and the other flange part (container flange) 7, and the code | symbol 8 is the circumferential groove 3. It is a sealing member (sealing member) that is housed inside and prevents internal water 9 and the like from leaking out (flowing out).

The flange sheet surface repair device according to the present invention includes, for example, an HVOF spray gun 11 and a partition wall 12 as shown in FIG.
The HVOF spray gun 11 includes a combustion chamber 13, a nozzle 14, and a barrel 15. In the combustion chamber 13, fuel and oxygen are mixed and ignited by the spark plug 16 to generate a combustion flame. The combustion flame generated in the combustion chamber 13 is once squeezed by a throat 17 provided in the middle of the nozzle 14, then passes through the widened portion of the nozzle 14, passes through the straight barrel 15, and exits from the outlet 15 a. Discharged. As the fuel, a gas such as hydrogen, acetylene or propane, or a liquid fuel such as kerosene is used. The powder material (raw material powder) is blown by the carrier gas into the combustion flame using the negative pressure at the outlet 14a at the end of the nozzle 14 and heated / accelerated in the barrel 15, and the barrel 15 together with the combustion flame. The film 15 is discharged from the outlet 15a, and flies about 20 to 40 cm on the inner peripheral side of the partition wall 12 to be deposited on the substrate (hereinafter, the flange sheet surface 2 will be described as a specific example) to form the film 18.

Here, as the powder material, for example, Zn, Al, Zn—Al alloy, SUS316L, Ni—Cr alloy, Hastelloy, Inconel, Monel, Stellite, Meteco 16C equivalent (4 types), Meteco 15E equivalent (5 types), Meteco 18C equivalent (1 type), cermet (WC-27NiCr, etc.), Cr ₂ O ₃ , Y ₂ O _3, etc. having excellent corrosion resistance are suitable, and among them, SUS316L, 50Ni-50Cr having particularly excellent corrosion resistance Alloys, Hastelloy B, Hastelloy C-276, Inconel 625 and the like are more preferable.
Further, as fuel, kerosene having a higher energy density (calorie) than other fuels is more preferable from the viewpoint that the film forming quality can be kept particularly high.

  As shown in FIG. 3, the partition wall 12 according to the present embodiment includes a first partition wall 21, a second partition wall 22, and a third partition wall 23. The first partition wall 21 includes a cylindrical portion 21a and a truncated cone portion 21b formed so as to be continuous with the cylindrical portion 21a, and is disposed on the inner side (in the radial direction) of the second partition wall 22. Yes. The second partition wall 22 includes a cylindrical portion 22a and a truncated cone portion 22b formed so as to be continuous with the cylindrical portion 22a, on the outer side (in the radial direction) of the first partition wall 21, and It is arranged inside (radial direction) the third partition wall 23. The third partition wall 23 includes a cylindrical portion 23a and a truncated cone portion 23b formed so as to be continuous with the cylindrical portion 23a, and is disposed outside (in the radial direction) of the second partition wall 22. Yes.

  When the HVOF spray gun 11 and the partition wall 12 are set on the flange sheet surface 2 to be repaired (see FIG. 3), the tip 21c of the truncated cone part 21b and the flange sheet surface 2 and the shortest distance between the tip 23c of the truncated cone part 23b and the flange sheet surface 2 are set to be larger. When the HVOF spray gun 11 and the partition wall 12 are set on the flange sheet surface 2 to be repaired (see FIG. 3), the tip 22c of the truncated cone part 22b and the flange sheet surface 2 and the shortest distance between the tip 23c of the truncated cone part 23b and the flange sheet surface 2 are set to be smaller. When the HVOF spray gun 11 and the partition wall 12 are set on the flange sheet surface 2 to be repaired (see FIG. 3), the tip 23c of the truncated cone part 23b and the flange sheet surface 2 and is set to be larger than the shortest distance between the tip 22c of the truncated cone portion 22b and the flange sheet surface 2.

The first space 24 formed by the first partition wall 21 and the second partition wall 22 includes, for example, a first cyclone C1, a filter F1, a mechanical booster pump MP1, and a rotary pump RP1. An exhaust gas recovery system 25 is connected, and the powder material or the like that has flowed into the first space 24 is discharged through the first exhaust gas recovery system 25.
On the other hand, the second space 26 formed by the second partition wall 22 and the second partition wall 23 includes, for example, a second valve valve 2, a cyclone C 2, a filter F 2, and a rotary pump RP 2. The exhaust gas recovery system 27 is connected, and the powder material, the air, etc. flowing into the second space 26 are discharged through the second exhaust gas recovery system 27.
The needle valve V2 finely adjusts the displacement, the cyclones C1 and C2 remove coarse particles, and the filters F1 and F2 remove fine particles to prevent clogging. The rotary pump RP1 is provided in order to secure the exhaust pressure of the mechanical booster pump MP1 and prevent the backflow from the mechanical booster pump MP1.

Also, as shown in FIG. 4, if the shortest distance h between the tip 21c of the truncated cone part 21b and the flange sheet surface 2 is large, or if the suction force of the first exhaust recovery system 25 is strong, it contributes to film formation. ) The effective powder material may be sucked, and as shown in FIG. 5, the shortest distance h between the tip 21c of the truncated cone part 21b and the flange sheet surface 2 is small, or the second exhaust recovery system 27 If the suction force is weak, the flow path resistance at the outlet of the first partition wall 21 (more specifically, the tip 21c of the truncated cone part 21b) increases, and the powder material that is not effective (does not contribute) to film formation cannot be sucked well. There is a risk of staying in the first partition wall 21. Therefore, the tip 21c of the truncated cone part 21b is set in consideration of these points.
On the other hand, if the shortest distance between the tip 22c of the truncated cone part 22b and the flange sheet surface 2 is large, the powder material that has leaked from the tip 21c of the truncated cone part 21b without contributing to the film formation will be lost at the tip of the truncated cone part 22b. There is a risk of leaking a large amount from between the 22c and the flange sheet surface 2. Therefore, the tip 22c of the truncated cone part 22b takes this point into consideration so that the amount of the powder material leaking from between the tip 22c of the truncated cone part 22b and the flange sheet surface 2 is reduced as much as possible. The shortest distance between the tip 22c of the base 22b and the flange sheet surface 2 is set to be as small as possible.
When the shortest distance between the tip 23c of the truncated cone part 23b and the flange sheet surface 2 is small, the air existing outside the third partition wall 23 can be successfully obtained from between the tip 23c of the truncated cone part 23b and the flange sheet surface 2. If suction cannot be performed and the powder material may leak from between the tip 23c of the truncated cone part 23b and the flange sheet surface 2, the shortest distance between the tip 23c of the truncated cone part 23b and the flange sheet surface 2 is large. Only the atmosphere existing outside the third partition wall 23 is sucked, and the powder material leaking from between the tip 22c of the truncated cone part 22b and the flange sheet surface 2 cannot be sucked well, and the tip 23c of the truncated cone part 23b. There is a possibility that the powder material leaks from between the flange surface 2 and the flange sheet surface 2. Therefore, the tip 23c of the truncated cone part 23b is set in consideration of these points.
Note that the suction force of the exhaust recovery system exhausted in the second space 26 is greater than the suction force of the exhaust recovery system exhausted in the first space 24.
Further, if the shortest distance between the tip of the first partition and the substrate is R1, and the shortest distance between the tips of the second and third partitions and the substrate is R2 and R3, respectively, R1>R2> R3≈0. .

According to the flange sheet surface repair device and the flange sheet surface repair method according to the present embodiment, most of the powder material that has not contributed to the formation of the film 18 flows into the first space 24 and flows into the second space 26. The powder material leaked from the tip 22c of the second partition wall 22 toward the third partition wall 23 and did not contribute to the formation of the coating 18 and the air existing outside the third partition wall 23 flowed in, The powder material does not leak out (does not flow out) outside the third partition wall 23.
As a result, the powder material (raw material powder) that did not contribute to film formation can be collected at the repair site, and the powder material that did not contribute to film formation can be prevented from diffusing into the atmosphere. .
Further, as shown in FIG. 2, the low-speed powder material that is located on the outer side in the radial direction and is not effective (not contributing to film formation) collides with the inner peripheral surface of the truncated cone portion 21 b of the first partition wall 21. Then, it accumulates on the inner peripheral surface of the truncated cone part 21 b of the first partition wall 21.
As a result, only the powder material having a high speed effective for film formation reaches the flange sheet surface 2 on the inner side in the radial direction, and an excellent film 18 is efficiently formed on the flange sheet surface 2. It is possible to improve the film forming quality.

A flange sheet surface repair device and a flange sheet surface repair method according to a second embodiment of the present invention will be described with reference to FIG. FIG. 6 is a configuration diagram showing a main part of the flange sheet surface repair device according to the present embodiment.
As shown in FIG. 6, the partition wall 12 according to this embodiment includes a first partition wall 21, a second partition wall 22, a third partition wall 23, and a fourth partition wall 31. It differs from that of the first embodiment described above. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment mentioned above.

The fourth partition wall 31 includes a cylindrical portion 31a and a truncated cone portion 31b formed so as to be continuous with the cylindrical portion 31a, and is disposed inside (in the radial direction) the first partition wall 21. Yes.
The truncated cone part 31b is made of a porous material or a mesh-like material having many holes through which powder material can pass, and the tip 31c of the truncated cone part 31b is the same as the tip 21c of the truncated cone part 21b. When the HVOF spray gun 11 (see FIG. 2) and the partition wall 12 are set on the flange sheet surface 2 to be repaired (see FIG. 3), the tip 22c of the truncated cone portion 22b and the flange sheet surface 2 The shortest distance is set to be larger than the shortest distance between the tip 23c of the truncated cone part 23b and the flange sheet surface 2.

In the third space 32 formed by the fourth partition wall 31 and the first partition wall 21, for example, a third exhaust gas provided with a needle valve V0, a cyclone C0, a filter F0, and a rotary pump RP0. A recovery system 33 is connected, and the powder material and the like flowing into the third space 32 are discharged through the third exhaust recovery system 33.
The needle valve V0 is provided to finely adjust the exhaust amount, the cyclone C0 removes coarse particles, and the filter F0 is provided to remove fine particles in order to prevent clogging of the filter F0.

According to the flange sheet surface repair device and the flange sheet surface repair method according to the present embodiment, the inner periphery of the truncated cone part 31b of the fourth partition wall 31 after the truncated cone part 31b of the fourth partition wall 31 is clogged. The powder material accumulates on the surface, can be used continuously for a long time, and a good continuous film 18 can be formed on the flange sheet surface 2.
Other functions and effects are the same as those of the above-described first embodiment, and thus description thereof is omitted here.

A flange sheet surface repair device and a flange sheet surface repair method according to a third embodiment of the present invention will be described with reference to FIG. FIG. 7 is a configuration diagram showing a main part of the flange sheet surface repair device according to the present embodiment.
The flange seat surface repair device according to the present embodiment is provided with an exhaust recovery system 41 shown in FIG. 7 instead of the second exhaust recovery system 27, and shown in FIG. 7 instead of the third exhaust recovery system 33. It differs from that of the second embodiment described above in that an exhaust recovery system 41 is provided. Since other components are the same as those of the second embodiment described above, description of these components is omitted here.

  The exhaust gas collection system 41 includes a water tank 42, a pump 43, and an aspirator (ejector) 44. The water stored in the water tank 42 is circulated by the pump 43, and a reduced pressure state is generated in the aspirator 44. The powder material and the air that flowed into the second space 26 are sucked and discharged from the second space 26, and the powder material and the like that flowed into the third space 32 are sucked into the third space. 32 is discharged from the inside.

According to the flange sheet surface repair device and the flange sheet surface repair method according to the present embodiment, since the powder material is collected in the water tank 42, the cyclones C0 and C2 and the filters F0 and F2 may be unnecessary. it can.
Other functions and effects are the same as those of the above-described second embodiment, and thus description thereof is omitted here.

A flange sheet surface repair device and a flange sheet surface repair method according to a fourth embodiment of the present invention will be described with reference to FIGS. 8 and 9. FIG. 8 is a conceptual diagram showing the main part of the flange sheet surface repair device according to the present embodiment, and FIG. 9 is a cross-sectional view showing the main part of the flange sheet surface repair device according to the present embodiment.
The flange sheet surface repair device according to the present embodiment is made of a porous material that has elasticity and heat resistance on the inner peripheral surface 31d of the truncated cone portion 31b and has many holes into which the powder material can enter. As shown in FIGS. 8 and 9, the rope 51 thus obtained is different from that of the second embodiment described above in that it is arranged in a spiral shape. Since other components are the same as those of the second embodiment described above, description of these components is omitted here.

  As shown in FIG. 8, the rope 51 has a rope moving mechanism (not shown) (for example, a rope feeding mechanism that sequentially feeds the rope 51 into the truncated cone part 31b, or a rope pulling mechanism that pulls the rope 51 from the truncated cone part 31b sequentially) By this, while turning along the inner peripheral surface 31d of the truncated cone part 31b, it moves from the reduced diameter side (tip side) toward the enlarged diameter side (cylindrical part side).

According to the flange sheet surface repair device and the flange sheet surface repair method according to the present embodiment, the ineffective powder material (not contributing to film formation) adheres to the rope 51 and is then discharged out of the partition wall 12 together with the rope 51. Therefore, clogging of the truncated cone part 31b can be prevented, the flange sheet surface repair device can be used continuously for a long time, and a good coating 18 continuous on the flange sheet surface 2 can be formed. A film can be formed.
Other functions and effects are the same as those of the above-described second embodiment, and thus description thereof is omitted here.

The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the gist of the present invention.
For example, a diaphragm pump, a vacuum pump, a blower, or the like can be used instead of the rotary pump RP1.

  Further, a cold spray method can be employed instead of the HVOF spraying method. That is, instead of the HVOF spray gun 11, a cold spray gun (not shown) that forms a film by impinging on a substrate (base material) in a solid state in supersonic flow with an inert gas without melting the powder material. Can also be adopted.

Furthermore, in the above-described embodiment, the sectional view shape of each partition wall 21, 22, 23, 31 is circular, but the present invention is not limited to this, and the shape of the flange sheet surface to be repaired It can be appropriately changed according to the above.
By matching the shape of each of the partition walls 21, 22, 23, and 31 with the shape of the flange sheet surface to be repaired, the partition walls 21, 22, 23, and 31 can also function as a mask, which is even better. A thin film 18 can be formed.

1 Flange sheet surface (substrate surface)
2 Flange sheet surface (substrate surface)
6 Flange (substrate)
7 Flange (board)
11 HVOF spray gun (gun)
12 partition wall 18 coating 21 first partition wall 21a cylindrical part 21b truncated cone part 21c tip 22 second partition wall 22a cylindrical part 22b truncated cone part 22c tip 23 third partition wall 23a cylindrical part 23b truncated cone part 23c tip 24 first Space 25 First exhaust recovery system 26 Second space 27 Second exhaust recovery system 31 Fourth partition wall 31a Cylindrical portion 31b Frustum portion 31c Tip 31d Inner peripheral surface 32 Third space 33 Third exhaust recovery system 51 rope

Claims (5)

A flange sheet surface repair device comprising a gun for blowing a powder material together with a combustion flame or an inert gas at a high speed to form a film on the surface of the substrate and a partition wall arranged so as to surround the periphery of the gun. There,
A first partition disposed outside the gun; a second partition disposed outside the first partition; and a third partition disposed outside the second partition. And
A first exhaust recovery system is connected to a first space formed between the first partition and the second partition, and the second partition and the third partition are connected to each other. A second exhaust recovery system is connected to the second space formed between
The shortest distance between the tip of the first partition and the substrate, the tip of the second partition and the tip so that most of the powder material that did not contribute to the formation of the film flows into the first space. The shortest distance to the substrate and the suction force of the first exhaust recovery system are set,
In the second space, the powder material that has leaked from the tip of the second partition wall to the third partition wall side and has not contributed to the formation of the film, and the air existing outside the third partition wall The flange sheet surface repair device is characterized in that the shortest distance between the tip of the third partition wall and the substrate and the suction force of the second exhaust recovery system are set so that the air flows.   Each of the first partition wall, the second partition wall, and the third partition wall includes a cylindrical portion and a truncated cone portion that is disposed on the distal end side of the cylindrical portion and tapers toward the distal end. The flange sheet surface repair device according to claim 1, wherein: The partition wall is disposed inside the first partition wall, and has a cylindrical portion and a hole that is disposed on the distal end side of the cylindrical portion, tapers toward the distal end, and allows the powder material to pass therethrough. A fourth partition wall having a truncated cone part made of a porous material or a mesh-like material having a large number,
The flange according to claim 1 or 2, wherein a third exhaust recovery system is connected to a third space formed between the first partition and the fourth partition. Seat surface repair device. A rope made of a porous material having a large number of holes having elasticity and allowing the powder material to enter is provided on the inner peripheral surface of the truncated cone portion constituting the fourth partition wall. It is arranged spirally along the peripheral surface,
The flange seat surface according to claim 3, wherein the rope is configured to be movable from the reduced diameter side toward the enlarged diameter side while turning along the inner peripheral surface by a rope moving mechanism. Repair device. A flange sheet surface repair method in which a powder material is blown out at high speed together with a combustion flame or an inert gas to form a film on the flange sheet surface,
A flange sheet surface repair method, which is performed using the flange sheet surface repair device according to any one of claims 1 to 4.

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