JPH0318141B2 - - Google Patents

Description

Detailed Description of the Invention <Field of Industrial Application> The present invention is applicable to reaction vessels for flammable gases and liquids in plant equipment such as petroleum refining, petrochemical, fine chemical, city gas, and nuclear power plants. The present invention relates to a device that inspects deterioration conditions such as corrosion and wear in equipment such as vessels and fluid systems such as piping.

<Conventional technology> Conventionally, when inspecting deterioration conditions such as wear (errosion) and corrosion (corrosion) in fluid systems such as equipment and piping in this type of plant equipment, for example, wear inspection The operator stops temporarily and visually inspects the inside of equipment and piping, and measures the thickness of equipment walls and piping to check for defects. Furthermore, in the corrosion inspection, the operation of the plant equipment is temporarily stopped, and the condition of the test piece is confirmed by taking it in and out of the equipment, piping, etc.

<Problems to be Solved by the Invention> However, in such conventional inspection methods, as mentioned above, it is necessary to temporarily stop the operation of the plant equipment, and the above inspection cannot be carried out during the operating period of the plant. It could not be done arbitrarily at any time.

For this reason, there was a problem in that the operating rate of the plant decreased, resulting in a large amount of operating costs and other great economic losses.

In view of the conventional situation, it is an object of the present invention to provide a highly reliable device capable of inspecting deterioration conditions such as wear and corrosion without affecting the operation of a plant or the like.

<Means for Solving the Problems> For this reason, the present invention provides a hollow member connected outside the structure to an opening formed in a structure wall in a fluid system, and has a surface inside the hollow member. A spherical member that partially faces the inside of the structure through the opening and always closes the opening is rotatably supported, while a part of the surface of the spherical member faces the inside of the structure through the opening. An external operating means is provided for rotationally positioning the spherical member between a position facing the inside of the body and a position facing the outside through a window provided in the hollow member, and at least a part of the surface of the spherical member facing the inside of the structure is A part to be inspected made of the same material as the wall was provided <Operation> Then, the spherical member was rotated to a position where a part of the surface faced the inside of the structure through the opening in the structure wall in the fluid system, and the structure was inspected. A part to be inspected made of the same material as the body wall is exposed to the fluid under the same conditions as the structure wall. When the time for inspection comes, the spherical member is rotated to a position where a portion of its surface faces the outside through a window provided in the hollow member, and the state of deterioration such as wear and corrosion of the portion to be inspected is inspected. Since the spherical member is rotated while closing the opening, the internal fluid will not leak outside through the opening in the structure wall in the fluid system, without affecting the operation of the plant, etc.
It is possible to inspect deterioration conditions such as wear and corrosion.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 7.

In FIG. 1, for example, an equipment main body 1 in plant equipment as a structural wall in a fluid system.
An opening 2 is provided in a part of the wall 1A.

A hollow member 3 connected to the outside of the device main body 1 is provided in the opening 2.

This hollow member 3 has a cylindrical body 4 whose one end is fixedly attached to the outer end of the opening 2 of the device main body wall 1A, and whose one end is connected to the other end of the body 4 and whose other end is a blind plate 5.
It consists of a cylindrical body cap 6 which is closed by a cylindrical body cap 6.

The body 4 and the outer end of the opening 2, the body 4, the body cap 6, and the blind plate 5 are connected by fastening the respective flanges 1a, 4a, 6a, and 5a with bolts and nuts (not shown). This is done by In addition, each of the above flange parts 1a, 4a, 6
Seal members 7 are interposed between a and 5a, respectively.

A spherical member 8 is disposed within the hollow member 3 and is rotatably supported while always slidingly contacting the seal portion on the inner surface of the hollow member 3 and closing the opening 2.

Here, a space 3A having a spherical inner surface is provided in the hollow member 3, and the spherical member 8 is arranged in this space 3A so as to be freely rotatable. At both ends of the space 3A, that is, at the end of the body 4 fixed to the device main body wall 1A and at the boundary between the opposite end of the body 4 and the end of the body cap 6,
Seal members 9 and 10, each serving as the seal portion, are each fixed in a ring shape about the same axis as the central axis of the opening 2 of the device main body wall 1A.

The spherical member 8 is selectively placed in a position where a part of the surface faces the inside of the device main body 1 through the opening 2 and a position where a part of the surface faces the outside through the opening of the body cap 6 as a window provided in the hollow member 3. External operating means are provided for rotational positioning. This external operating means is
One end is fixed to the spherical member 8, and the other end is a stem 12 that penetrates a through support hole 11 formed in the body 4 and projects to the outside.

Here, the stem 12 is disposed so as to extend on an axis that is perpendicular to the central axis of the opening 2 and passes through the center of the spherical member 8, and its inner end is a groove formed in the wall surface of the spherical member 8. 8a. An operating handle (not shown) is detachably attached to the outer end of the stem 12. In the structure of the outer peripheral portion of the stem 12, 13 is a washer, 14 is a thrust bearing, 15 is a packing, 16 is a gland for suppressing packing, and 17 is a stem bearing, and the stem 12 seals the inside of the hollow member 3. and is rotatably supported in the through support hole 11.

Therefore, when the stem 12 is rotated 180 degrees from the state shown in the figure, the spherical member 8 changes from the state shown in the figure, that is, a state in which a part of the surface faces into the device main body 1 through the opening 2.
Rotate 180 degrees to open the body cap 6, i.e.
It is designed to be rotated to a position facing the outside through the window.

Then, at least a part of the surface of the spherical member 8 facing the inside of the device body 1 is provided with an inspection target portion made of the same material as the device body wall 1A.

In this embodiment, the spherical member 8 itself is made of the same material as the device main body wall 1A, and a part of the outer circumference of the spherical member 8 that faces inside the device main body 1 is cut so as to be parallel to the opening 2 surface. A flat portion 8A is provided.

Furthermore, a pair of parallel rods 19 are fixedly attached by welding to this flat part 8A, which constitute a reference part when measuring with a depth gauge 18 used during an inspection to be described later (see Fig. 2). .

This bar 19 is made of a corrosion-resistant metal. The rod 19 may be fixedly attached using screws, screws, etc., instead of welding, as long as it has corrosion resistance.

Then, the bar 1 of the flat part 8A of the spherical member 8
Corrosion measurement point CGP (corrosion gage)
point), and the degree of corrosion at this corrosion measurement point CGP is measured using the depth gauge 18.

Note that the spherical member 8 is made of a corrosion-resistant metal, and the bar 19 is made of a corrosion-resistant metal.
may be used as a test piece to inspect its corrosion state, etc. Also, as shown in Fig. 6,
A T-shaped test piece 22 made of the same material as the device body wall 1A is fixedly attached to the flat part 8A of the spherical member 8 with a corrosion-resistant screw 23, and the thickness t of this test piece 22 is measured. , corrosion state, etc. may be inspected.

Alternatively, as shown in FIG. 4, the bar 19 and the test piece 22 may be removed from the flat surface 8A of the spherical member 8, and the state of the flat surface 8A may be visually observed to determine its corrosion state. .

In this configuration, as shown in FIG. 1, the spherical member 8 is rotated to a position where the corrosion measurement point CGP faces the inside of the device body 1 through the opening 2 of the device body wall 1A, and the corrosion measurement is performed. Point CGP to the device body 1
exposed to the fluid under the same conditions. Then, when the inspection time comes, as described above, when the stem 12 is rotated 180 degrees, the spherical member 8 will be rotated as shown in FIG.
After rotating 180 degrees, the corrosion measuring point CGP is located at the opening of the body cap 6, that is, facing the outside through the window.

Therefore, the blind plate 5 is removed and, as shown in FIG. 3, the state of deterioration such as wear and corrosion at the corrosion measuring point CGP is measured using the depth gauge 18. Since the spherical member 8 is rotated while always slidingly contacting the sealing members 9 and 10 on the inner surface of the hollow member 3 and closing the opening 2, the fluid inside the device main body 1 will not leak to the outside through the opening 2. It is possible to inspect deterioration conditions such as wear and corrosion without affecting the operation of plant equipment.

As mentioned above, since the opening 2 is always closed, no fluid flows into the hollow member 3, so the blind plate 5 that closes the opening of the body cap 6 is not particularly necessary and can be omitted. It's okay.

Next, FIGS. 5 to 7 show other embodiments of a structure for attaching the hollow member 3 provided with the spherical member 8 to the device main body 1 or piping.

That is, in the embodiment shown in FIG. 5, the hollow member 3 is attached to the device body 1 or piping, etc., by direct welding or the like. In this case, the spherical member 8 is disposed within the hollow member 3 so as to protrude outward from the open end of the hollow member 3. Further, the protruding portion of the spherical member 8 is rotated to the inner circumferential surface of the opening 2 of the device main body 1 formed in a spherical shape so that its flat portion 8A is flush with the inner surface of the device main body 1 or piping, etc. Freely mated and supported.

In the embodiment shown in FIG.
is attached to the device body 1 or piping etc. via a nozzle 20. In this case, the flange portion 20a provided on the nozzle 20 and the flange portion 1a on the hollow member 4 side are fastened and connected using bolts and nuts.

Moreover, the spherical member 8 faces into the nozzle 20.

In the embodiment shown in FIG. 7, for example, when connecting the hollow member 3 to pipes, the body 4 constituting the hollow member 3 is integrated with a short pipe 21 interposed and connected between the pipes. It is molded.

In this case, the spherical member 8 faces into the short tube 21. Further, the short tube 21 is made of a high-grade material with excellent corrosion resistance. Further, the portion of the spherical member 8 to be inspected is formed as a curved portion 8B to match the inner surface of the short tube 21.

Note that in the embodiments shown in FIGS. 4, 5, and 7, the bar 19 is connected from the flat part 8A or curved part 8B of the spherical member 8, similarly to the embodiment shown in FIG.
1 and 6, a pair of rods 19 and T It is also possible to use a fixedly attached test piece 22 in the shape of a letter.

<Effects of the Invention> As described above, according to the present invention, a spherical member having a part of its surface facing an opening formed in a structure wall in a fluid system is provided, and by rotation of this spherical member, the above-mentioned Since the internal fluid does not leak to the outside through the opening, and the deterioration state such as wear and corrosion of the part to be inspected provided on at least a part of the surface of the spherical member is inspected, the operation of the plant, etc. It is possible to inspect deterioration conditions such as wear and corrosion in the fluid system without affecting the system, and it is possible to provide equipment with excellent reliability, which prevents a drop in the operating rate of the plant, etc., and reduces operating costs. can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a deterioration testing device for a fluid system according to the present invention, FIG. 2 is a side view of a spherical member in the same device, and FIG. 3 is a sectional view showing a deterioration testing method using the same device. , FIGS. 4 to 7 are sectional views showing other embodiments of the present invention. 1...Device body, 1A...Wall, 2...Opening,
3...Hollow member, 4...Body, 6...Body cap, 8...Spherical member, 9, 10...Sealing member, 11...Through support hole, 12...Stem, 8A
...Plane part, 8B...Curved surface part, 20...Nozzle,
21...Short pipe, 23...Test piece, CGP...
...Corrosion measurement point.

Claims (1)

[Claims] 1. A hollow member connected outside the structure is provided to an opening formed in a structure wall in a fluid system, and a part of the surface faces the inside of the structure through the opening and a hollow member is provided inside the hollow member. A spherical member that always closes the opening is rotatably supported, and a part of the surface of the spherical member faces the inside of the structure through the opening, and a part of the surface of the spherical member faces the outside through a window provided in the hollow member. An external operating means is provided for rotating the spherical member to a facing position, and an inspection target portion made of the same material as the structure wall is provided on at least a part of the surface of the spherical member facing the inside of the structure. A deterioration inspection device for fluid systems.