JP3550239B2 - Insulation panel - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat insulating panel that covers an outer peripheral surface of various target devices.
[0002]
[Prior art]
Conventionally, this type of heat insulating covering material has been used for keeping heat of various kinds of equipment, and some of them are used at the time of periodic inspections and the like.
For example, in order to keep the temperature of equipment in a nuclear power plant, there is one that is used while covering the entire outer periphery thereof.
Specifically, first, a plate-shaped heat insulating material is wound around the outer peripheral surface of the target device, fixed with a binding material, and covered with heat. After winding a metal exterior plate or the like from above, there have been known ones in which ends of the metal exterior plate are brazed or fixed with a tapping screw.
[Problems to be solved by the invention]
However, the above-mentioned conventional heat insulating covering material has the following problems.
That is, not only a plurality of work steps are required for heat insulation coating, but also the panel needs to be processed around the equipment to be installed, and the installation time tends to be long. Further, such an operation is generally performed around the target device.
In particular, when the target device is related to a nuclear power plant, the longer the working time, the more inconvenience that the worker's radiation exposure dose increases. Furthermore, there is a problem that the residual material at the time of processing becomes low-level radioactive waste.
As described above, there is still room for improvement in coating various devices using the above-mentioned conventional heat insulating coating material.
[0003]
An object of the present invention is to solve such a disadvantage of the conventional technology and to provide a heat insulating panel that can be easily attached to and detached from a target device.
[0004]
[Means for Solving the Problems]
(Configuration 1)
In order to achieve this object, the heat insulating panel according to the present invention is characterized in that, as described in claim 1, an outer portion is formed of a metal plate, and an inner portion is formed of a heat insulating material. A connecting member for connecting adjacent metal plates is fixed to the metal plate by a heat insulating material holder provided on the back side of the metal plate so as to be exposed inward of the metal plate. Attached to a plate , holding contact portions at four corners of the metal plate to secure relative positions of the adjacent metal plates only in a direction along the plate surface of the metal plate from the four corners. In a state where the heat insulating material is attached to the target device, the back surface of the heat insulating material can be brought into close contact with the target device, and the heat insulating materials of adjacent heat insulating panels can be brought into close contact with each other. wherein the wood back surface Setto Exposing the what was heat insulator end surface between lies in coated freely form an outer circumferential surface of various target device by assembling.
(Action / Effect)
In the heat insulating panel of the present invention, the metal plate forming the outer layer and the heat insulating material forming the inner layer are already integrally formed before being attached to the target device. In order to cover the heat retention target device, the heat insulation panel divided in advance is assembled in a state where the heat insulation panel is in contact with the outer surface of the heat retention target device. The insulating panel of the present invention, the contact part at the four corners of the metal plate, is provided so as to embrace only in the direction along the heat insulating material from the four corners on the plate surface of the metal plate, in a state attached to the target device, insulation can be brought into close contact with the rear surface of the timber to the target device, and so it can be brought into close contact with the heat insulating material to each other of the adjacent insulating panels, exposing the insulation material end face between the contact portion with each other and the heat insulating material backside The relative positions of the metal plates adjacent to each other in the upper, lower, left, and right directions can be easily determined by the contact between the contact portions of the adjacent heat insulating panels. Then, the metal plates can be easily connected by the connecting member.
As described above, according to the heat insulating panel of the present invention, no special processing is required at the time of the covering operation, and the mounting itself is simple, so that the construction time can be significantly reduced as compared with the case where the conventional heat insulating covering material is used. . Therefore, even if the target device is a device related to a nuclear power plant, no radioactive waste is generated, and the radiation exposure of workers can be minimized.
Then, since the heat insulating material is exposed on the back surface of the heat insulating panel and most of the peripheral portion, the adjacent heat insulating panels or the heat insulating panel and the target device main body are more closely adhered to each other. Therefore, the heat radiation from the joints between the heat insulating panels is suppressed, and no gap is generated between the device main body and the heat insulating material. Thus, heat loss due to convection which tends to occur when the gap exists is not generated.
[0005]
(Configuration 2)
As described in claim 2, the heat insulation panel of the present invention is configured such that the heat insulation material holding fitting is composed of a bolt member welded to the metal plate and a fitting member externally fitted to a tip portion of the bolt member. Can be.
(Action / Effect)
In this configuration, the bolt members are arranged at predetermined positions on the metal plate in a scattered manner, and these bolt members share and support the heat insulating material.
Generally, the heat insulating material is easily deformed because it is made of fiber or the like. Moreover, since the thermal insulation coating is usually applied to the outer surface of the device that is perpendicular to the ground, after the target device is coated, it may contract downward and deform over time. .
However, if the bolt members are arranged for each predetermined area as in the present configuration, the individual bolt members share and support the weight of the heat insulating material. Therefore, even if the heat insulating material attempts to shrink and deform due to gravity, only the deformation occurs in each of the assigned ranges, and the amount of shrinkage and deformation does not accumulate in one place.
As described above, according to this configuration, the position of the heat insulating material can be maintained over the entire surface of the metal plate, and the heat retaining effect is ensured.
[0006]
(Configuration 3)
According to the third aspect of the present invention, as described in claim 3, a metal band for covering a joint between the adjacent metal plates can be provided on at least one side of the periphery of the metal plate. ·effect)
According to this configuration, it is possible to suppress the heat possessed by the target device from diffusing from the gap between the metal plates.
In addition, the device body during operation often generates vibration, but this configuration can also prevent the heat insulating material from scattering from the joint of the metal plate due to such vibration.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0008]
FIG. 1 is a schematic diagram when using the heat insulating panel of the present invention.
The target device A to which the heat insulating panel P is to be attached is a large container that mainly needs to be kept warm, such as a steam generator in various plants. For safety reasons, such equipment needs to be inspected and maintained at regular intervals, and the heat insulating material is replaced with a new one every time inspection and maintenance is performed.
In particular, maintenance and inspection work on equipment related to nuclear power generation requires quickness for the purpose of minimizing the radiation exposure dose of workers. Further, it is necessary to minimize the work involving processing at the site. This is because residual materials generated during processing become low-level radioactive waste.
[0009]
The heat insulating panel P of the present invention is configured to be assembled and mounted so as to cover the outer peripheral surface of the target device A in order to satisfy the above requirements.
As shown in FIGS. 2 and 3, the heat insulating panel P according to the present invention includes a metal plate 1 disposed on an outer layer and a heat insulating material 2 provided on an inner layer. The metal plate 1 and the heat insulating material 2 are already integrally formed before being attached to the target device A, and are formed into a predetermined curved surface shape in order to ensure the close contact with the target device A. .
The size of the heat insulating panel P is, for example, about 600 mm in length, 1000 mm in width, and about 100 mm in thickness. Of course, the size is not limited to these. As the metal plate 1, a stainless steel plate such as SUS304 excellent in rust prevention and anti-corrosion properties, or a zinc iron plate (commonly called a color iron plate) which is baked and painted with a coloring paint is used. The sheet thickness is preferably, for example, about 0.5 to 1 mm in consideration of workability, strength, weldability, and the like.
On the other hand, as the heat insulating material 2, for example, rock wool is used, and in this case, a material having a bulk specific gravity of about 70 to 150 kg / m ³ is used.
In order to attach the heat insulating material 2 to the back side of the metal plate 1, a heat insulating material holder 3 provided in advance to the back side of the metal plate 1 is used as shown in FIG. The heat insulating material holder 3 is, for example, a bolt member 4 welded and fixed to the back surface of the metal plate 1 and a fitting member 5 that can be fitted to the bolt member 4. The fitting member 5 may be, for example, a washer that fits by utilizing the elasticity of the member itself as shown in FIGS. 5A and 5B, or a nut that can be screwed to the bolt member 4. May be used. The bolt member 4 may also be a simple rod-shaped member.
The heat insulating material holder 3 is provided at predetermined intervals on the back surface of the metal plate 1. The first reason for providing at predetermined intervals in this way is to prevent the heat insulating material 2 from contracting and deforming downward due to gravity or the like.
Since the heat insulating material 2 is made of rock wool fiber or the like, it is relatively easily deformed. Moreover, since the heat insulation coating is generally applied to the outer surface of the target device A which is generally perpendicular to the ground, after the target device A is coated, the heat insulating coating is applied downward with time. May shrink and deform.
However, if the heat insulating material holders 3 are arranged for each predetermined area as in the present configuration, the individual heat insulating material holders 3 share and support the weight of the heat insulating material 2. Therefore, even if the heat insulating material 2 tries to shrink and deform due to gravity, each heat insulating material holder 3 stops the deformation within a certain range, so that the position of the heat insulating material 2 can be surely held.
Furthermore, the second reason for providing the heat insulating material holders 3 at predetermined intervals with respect to the back surface of the metal plate 1 is that a predetermined interval is maintained between the metal plate 1 and the target device A. It is in.
That is, according to the present configuration, the distal end of the heat insulating material holder 3 abuts on the outer surface of the target device A, so that the distance between the metal plate 1 and the target device A can be kept constant. That is, the heat insulating material 2 sandwiched between the two members is not unnecessarily pressed, and the heat insulating material 2 has a small space for keeping heat therein. Therefore, the heat retaining effect of the heat insulating material 2 can be favorably maintained for a long time.
[0010]
The heat insulating panel P is assembled and attached to the target device A from a lower portion to an upper portion so as to be in contact with the outer surface of the target device A. At this time, as described above, since the thickness of the metal plate 1 is thin, as shown in FIG. 3, in order to easily arrange the metal plate 1 in the up-down direction or the left-right direction, Contact portions 6 are provided at four corners of the metal plate 1.
Specifically, the contact portion 6 projects the angle of the L-shaped cross section from four corners of the metal plate 1 toward the inner surface side of the metal plate 1 substantially perpendicularly to the surface of the metal plate 1. Is provided. The projecting length of the contact portion 6 is substantially the same as the thickness of the heat insulating material 2 and is configured to hold the heat insulating material 2 from four corners.
[0011]
A connecting member 7 for connecting adjacent heat insulating panels P is provided on a peripheral portion of the metal plate 1. The connecting member 7 is, for example, a buckle of a buckle type. Thereby, the connection work or the removal work of the heat insulating panels P can be performed quickly.
[0012]
The heat insulation panel P is provided with a metal band 8 for covering a joint between the adjacent metal plates 1 on at least one side of the periphery of the metal plate 1.
For example, the metal band 8 is attached such that half of the plate width is overlapped on the peripheral edge of the metal plate 1. As an attachment method, a method such as joining by spot welding, seam welding, or the like, or a method in which the peripheral edge of the metal plate 1 itself is bent and formed in a step shape may be used.
According to this configuration, it is possible to suppress the heat possessed by the target device A from radiating from the gap between the metal plates 1.
In addition, the main body of the target device A during operation often generates vibration. However, if the main body of the target device A is provided with the metal band 8 of the present configuration, the heat insulating material 2 causes the joint between the metal plates 1 due to such vibration. It is also possible to prevent a situation in which the water is scattered.
[0013]
On the other hand, as shown in FIG. 4, a heat insulating panel support 9 for supporting the load of the heat insulating panel P at a certain height is provided on the side of the target device A. As described above, even if the heat insulating panel P has the contact portion 6, if the heat insulating panel P is overlaid in multiple stages in the vertical direction, the metal plate 1 located at the lower portion may buckle. For this reason, protruding heat insulating panel supports 9 along the outer periphery of the target device A are provided in every three stages of the heat insulating panel P in the vertical direction, and the load of the heat insulating panel P which the metal plate 1 itself bears. Is considered so as not to be excessive.
The heat insulating panel support 9 is formed in a long shape with a steel material such as SS400, for example, is wound around the target device A, and then attached by a method such as connecting ends thereof with bolt members.
[0014]
As described above, according to the heat insulation panel P of the present invention, in a state where the heat insulation material 2 and the target device A main body are attached to the target device A, and the heat insulation of the adjacent heat insulation panel P, Since the materials 2 are in close contact with each other, the heat radiation from the joints between the heat insulating panels P is suppressed, and no gap is formed between the target device A main body and the heat insulating material 2, and such a gap exists. There is no heat loss due to convection which tends to occur in some cases.
[0015]
When the heat insulation panel P of the present invention was used in the renewal of heat retention accompanying the steam generator replacement work of the first Oi power plant of Kansai Electric Power Co., Inc., the construction man-hour was reduced by about 25% compared with the conventional method. did it. This is considered that the light weight of the heat-insulating panel P of the present invention also contributes to the reduction of the number of construction steps.
Accordingly, the radiation exposure dose of the workers engaged in the replacement work was also reduced by about 25%.
Furthermore, as compared with a capsule heat insulating material in which the heat insulating material 2 is entirely covered with a metal plate, the production cost could be reduced to about 25%.
[0016]
As described above, according to the heat insulating panel P of the present invention, since the attaching / detaching operation to the target device itself is simple and no special processing is required, the replacement mounting time is shorter than when the conventional heat insulating covering material is used. Can be greatly reduced.
The heat insulation panel P of the present invention can minimize the radiation exposure of workers even if the target equipment A is a device related to a nuclear power plant, and does not generate radioactive waste. This significantly improves the problems that have arisen when using the heat insulating material.
[0017]
In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a state in which the heat insulating panel of the present invention is mounted on a target device. FIG. 2 is a side longitudinal sectional view of the heat insulating panel according to the present invention. FIG. FIG. 4 is a longitudinal sectional view showing a state where the heat insulating panel according to the present invention is attached to a target device. FIG. 5 is a plan view showing an example of a fitting member according to the present invention.
DESCRIPTION OF SYMBOLS 1 Metal plate 2 Heat insulating material 3 Heat insulating material holder 4 Bolt member 5 Fitting member 6 Contact part 7 Connecting member 8 Metal band

Claims (3)

The outer part is made of a metal plate (1), and the inner part is made of a heat insulating material (2).
The heat insulating material (2) is exposed by the heat insulating material holder (3) provided on the back side of the metal plate (1) such that the heat insulating material (2) is exposed inward of the metal plate (1). )
A connecting member (7) for connecting adjacent metal plates (1) is attached to the metal plate (1), and four corners of the metal plate (1) are provided at the four corners of the adjacent metal plates (1). A contact portion (6) for securing a relative position is provided so as to hold the heat insulating material (2) only from the four corners in a direction along the plate surface of the metal plate (1), and the target device (A ), The back surface of the heat insulating material (2) can be brought into close contact with the target device (A), and the heat insulating materials (2) of adjacent heat insulating panels can be brought into close contact with each other. , insulation back surface and the contact portion (6) How to insulating panels are exposed to the heat insulator end surface between coats freely form an outer circumferential surface of various target device by assembly of the. The said heat insulating material holding | maintenance (3) is a bolt member (4) welded to the said metal plate (1), and a fitting member (5) fitted externally to the front-end | tip part of the said bolt member (4). 2. The heat insulating panel according to 1. The heat insulating panel according to claim 1 or 2, wherein a metal band (8) for covering a joint between the adjacent metal plates (1) is provided on at least one side of a periphery of the metal plate (1).

Images