JPH09178090A - Heat insulation panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform fitting and detaching against an object device. SOLUTION: In this heat insulation panel, the outside part is constituted of a metal plate 1, the inside part is constituted of a heat insulation material 2, the heat insulation material 2 is fixed to the metal plate 1 by a heat insulation material holder provided on the back side of the metal plate 1, so that the heat insulation material is exposed to the inside of the metal plate 1, and connecting members for connecting the adjoining metal plates 1 to each other are fitted to the metal plate 1. Contact parts 6 for insuring relative position of the adjoining metal plates are provided on the four corners of the metal plate 1, and the panels are formed by assembling so that the outer circumferential faces of various object devices can be covered with them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating panel for covering the outer peripheral surface of various target devices.

[0002]

2. Description of the Related Art Heretofore, this type of heat insulating covering material has been used as a heat insulating material for various kinds of equipment and may be exchanged for use during its periodic inspection. For example, there is one that is used in a state of covering the entire outer periphery of a nuclear power plant in order to keep it warm. Specifically, first, a plate-shaped heat insulating material is wrapped around the outer peripheral surface of the target device, fixed with a binding material, and heat-insulated. There has been a method in which after winding a metal exterior plate or the like from above, the ends of the metal exterior plate are scratched or fixed with a tapping screw.

However, the above conventional heat insulating coating material has the following problems. That is, not only a plurality of working steps are required for heat insulating coating, but also the panel needs to be processed around the equipment to be constructed, and the construction time tends to be long. In addition, such work is generally performed around the target device. In particular, when the target equipment relates to a nuclear power plant, the longer the working time, the more the radiation exposure dose of the worker increases. Further, there is a problem that the residual material at the time of processing becomes a low level radioactive waste. As described above, there is still room for improvement in covering various devices with the conventional heat insulating covering material.

An object of the present invention is to eliminate the drawbacks of the prior art and to provide a heat insulating panel which can be easily attached to and detached from a target device.

[0004]

[Means for Solving the Problems]

(Structure 1) As a characteristic structure of the heat insulating panel of the present invention for achieving this object, as described in claim 1, the outer part is made of a metal plate, the inner part is made of a heat insulating material, and The material 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, and a connection for connecting the adjacent metal plates. Attach the member to the metal plate,
The four corners of the metal plate are provided with contact portions for ensuring the relative positions of the adjacent metal plates, and the outer peripheral surfaces of various target devices are formed so as to be covered by assembly. (Operation / 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 device to be heat-insulated, the heat-insulating panel, which is divided and formed in advance, is assembled in a state of being in contact with the outer surface of the device to be heat-insulated. The heat insulating panel of the present invention is provided with abutting portions at four corners of the metal plate, and the abutting portions of adjacent heat insulating panels abut each other, so that the relative positions of the metal plates adjacent to each other vertically and horizontally. Can be easily determined. Then, the metal plates can be easily connected by the connecting member. in this way,
According to the heat insulating panel of the present invention, no special processing is required for the covering work and the mounting itself is simple, and therefore the construction time can be greatly shortened as compared with the case of using the conventional heat insulating covering material. Therefore, even if the target device is a device related to a nuclear power plant, no radioactive waste is generated, and the radiation exposure dose of the worker 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 heat insulating panels are in close contact with each other, or the heat insulating panel and the main body of the target device are more closely attached. Therefore, heat dissipation from joints between the heat insulating panels is suppressed, and since no gap is formed between the device body and the heat insulating material, heat loss due to convection that tends to occur when there is a gap does not occur.

(Structure 2) In the heat insulating panel of the present invention, as described in claim 2, the heat insulating material holding metal fitting is externally fitted to the bolt member welded to the metal plate and the tip end portion of the bolt member. It can be configured with a combination member. (Operation / Effect) In this structure, the bolt members are arranged in a dotted manner at predetermined positions of the metal plate, and the heat insulating material is shared and supported by these bolt members. Generally, since the heat insulating material is made of fibers or the like, it is easily deformed. Moreover, since the heat insulating coating is usually applied to the surface of the equipment which is perpendicular to the ground, it may contract and deform downward with time after coating the target equipment. . However, if the bolt members are arranged for each predetermined area as in the present configuration, the individual bolt members share the weight of the heat insulating material. Therefore, even if the heat insulating material is contracted and deformed by gravity, the heat insulating material is only deformed in each sharing range, and the contracted deformation amount is not accumulated in one place. As described above, according to this configuration, the heat insulating material can be held in position over the entire surface of the metal plate, and the heat retaining effect is ensured.

(Structure 3) In the heat insulation panel of the present invention, as described in claim 3, a metal strip for covering the joint between the adjacent metal plates is provided on at least one side of the periphery of the metal plates. According to this configuration, the heat retained by the target device can be configured
It is possible to suppress the diffusion from the gap between the metal plates. In addition, while the device body in operation often generates vibration, this structure can prevent the heat insulating material from scattering from the seam of the metal plate due to such vibration.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic view of using the heat insulation panel of the present invention. Target device A to which the heat insulating panel P is attached
As for the large container, which is mainly required to be kept warm, for example, a steam generator in various plants can be considered. For safety, it is necessary to inspect and maintain such a device at regular intervals, and the heat insulating material is replaced with a new one after every inspection and maintenance. In particular, maintenance and inspection work for equipment related to nuclear power generation is required to be prompt in order to minimize the radiation exposure dose of workers. Furthermore, it is necessary to avoid work involving processing on site as much as possible. This is because the residual material generated during processing becomes low-level radioactive waste.

The heat insulating panel P of the present invention is constructed and mounted so as to cover the outer peripheral surface of the target device A so as to satisfy the above requirements. The heat insulation panel P according to the present invention is shown in FIG.
As shown in FIG. 3 and FIG. 3, the metal plate 1 is arranged on the outer layer, and the heat insulating material 2 is provided on the 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 adhesion to the target device A. . The size of the heat insulating panel P is, for example, 600 mm in length and 1 in width.
The thickness is about 000 mm and the thickness is about 100 mm. Of course, the size is not limited to these. The metal plate 1
As the material, a stainless steel plate such as SUS304 which is excellent in rust prevention and corrosion resistance, or a zinc iron plate (commonly called a color iron plate) which is pre-baked with a coloring paint is used. Considering workability, strength, weldability, etc., the plate thickness is preferably about 0.5 to 1 mm. 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. To attach the heat insulating material 2 to the back side of the metal plate 1, as shown in FIG. 2, a heat insulating material holder 3 provided in advance on the back side of the metal plate 1 is used. 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 into the bolt member 4. This fitting member 5 is, for example, as shown in FIG.
It may be a washer that fits by utilizing the elasticity of the member itself, or a nut that can be screwed onto the bolt member 4 may be used. The bolt member 4 may also be a simple rod-shaped member. The heat insulating material holders 3 are provided on the back surface of the metal plate 1 at predetermined intervals. As described above, the first reason for providing the heat insulating material at predetermined intervals 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. In addition, since the heat insulating coating is generally applied to the surface of the target device A that is perpendicular to the ground, after the target device A is coated, the heat insulating coating is applied downwards with time. May contract 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 shrinks and deforms due to gravity, the individual heat insulating material holders 3 stop the deformation within a certain range, so that the position of the heat insulating material 2 can be reliably held. Furthermore, the second reason for providing the heat insulating material holder 3 on the back surface of the metal plate 1 at predetermined intervals is as follows.
The point is to maintain a predetermined interval over That is, according to this configuration, the tip of the heat insulating material holder 3 contacts the outer surface of the target device A, and the metal plate 1 and the target device A are contacted.
The distance between and can be kept constant. That is, the heat insulating material 2 sandwiched between the two is not unnecessarily pressed, and the minute space for keeping heat inside the heat insulating material 2 is not crushed. Therefore, the heat insulating effect of the heat insulating material 2 can be favorably maintained for a long period of time.

The heat insulation panel P is assembled and attached to the target device A from the lower part to the upper part in a state of being in contact with the outer surface of the target device A. At that time, as described above, since the metal plate 1 has a small thickness, in order to facilitate the contacting arrangement of the metal plate 1 in the vertical direction or the horizontal direction, as shown in FIG. The metal plate 1
The contact portions 6 are provided at the four corners of the. Specifically, the contact portion 6 projects the angle of the L-shaped cross section from the 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. It is provided and configured.
The protruding 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 the four corners.

A connecting member 7 for connecting the heat insulating panels P adjacent to each other is provided on the peripheral portion of the metal plate 1. The connecting member 7 is, for example, a buckle of a hanging type. As a result, the work of connecting or disconnecting the heat insulating panels P can be performed quickly.

The heat insulating panel P is provided with a metal band 8 for covering the joint between the adjacent metal plates 1 on at least one side of the periphery of the metal plates 1. For example,
The metal strip 8 is attached such that half of its plate width is overlapped with the peripheral edge of the metal plate 1. As a mounting method, spot welding, seam welding, or the like may be used, or the peripheral edge of the metal plate 1 itself may be bent and formed in a step shape. According to this configuration, it is possible to suppress the retained heat of the target device A from radiating from the gap between the metal plates 1. In addition, the main body of the target device A in operation often generates vibration, but if the metal band 8 of this configuration is provided, the heat insulating material 2 causes the vibration to cause the heat insulation 2 to join the metal plates 1 to each other. It is also possible to prevent the situation from scattering from.

On the other hand, as shown in FIG.
A heat insulating panel supporter 9 for supporting the load of the heat insulating panel P is provided on the side of a constant height. As described above, even if the heat insulating panel P has the abutting portion 6, if the metal plates 1 located in the lower portion are buckled, they may be buckled if they are overlaid in multiple stages in the vertical direction. Therefore, the projecting heat insulating panel support 9 along the outer periphery of the target device A is provided in every three stages of the heat insulating panel P in the vertical direction, and the load of the heat insulating panel P that the metal plate 1 itself bears. Is taken into consideration so that it does not become excessive. The heat-insulating panel support 9 is made of, for example, a steel material such as SS400 in a long shape, is wound around the target device A, and is attached by a method of connecting end portions thereof with a bolt member.

As described above, according to the heat insulating panel P of the present invention, the heat insulating material 2 and the main body of the target device A and the adjacent heat insulating panel P are attached to the target device A in the state of being attached to the target device A. Since the heat insulating materials 2 are in close contact with each other, heat radiation from joints between the heat insulating panels P is suppressed, and no gap is generated between the target device A main body and the heat insulating material 2. The heat loss due to convection, which is apt to occur in the presence of, does not occur.

The heat insulating panel P of the present invention is manufactured by Kansai Electric Power Co., Inc.
When used in the heat insulation renewal work accompanying the steam generator replacement work of the first unit of Ohi Power Station, the construction man-hours were reduced by about 25% compared with the conventional method. It is considered that this is because the light weight of the heat insulating panel P of the present invention also contributes to the reduction of the number of construction steps. Along with this, the radiation exposure dose of the workers engaged in the replacement work could be reduced by about 25%. Furthermore, compared to a capsule heat insulating material that completely covers the heat insulating material 2 with a metal plate, the manufacturing cost is 25
It was able to be contained in about%.

As described above, according to the heat insulating panel P of the present invention, since the work of attaching / detaching to / from the target device is simple and no special processing is required, the heat insulating covering material is replaced as compared with the case of using the conventional heat insulating covering material. Installation time can be greatly reduced. The heat insulating panel P of the present invention can minimize the radiation exposure of workers even if the target device A is a device related to a nuclear power plant, does not generate radioactive waste, and has a conventional structure. It greatly improves the problems that occurred when using the heat insulating material.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a state in which a heat insulating panel of the present invention is attached to a target device.

FIG. 2 is a lateral longitudinal sectional view of a heat insulation panel according to the present invention.

FIG. 3 is a perspective view showing the external shape of the heat insulating panel of the present invention.

FIG. 4 is a vertical cross-sectional view showing a state in which the heat insulation 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.

[Explanation of symbols]

 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)

[Claims] 1. An outer part is made of a metal plate (1), an inner part is made of a heat insulating material (2), and the heat insulating material (2) is exposed inward of the metal plate (1). The metal plate (1) is fixed to the metal plate (1) by a heat insulating material holder (3) provided on the back side of the metal plate (1) so that the adjacent metal plates (1) are connected to each other. The member (7) is attached to the metal plate (1), and contacting portions (6) are provided at four corners of the metal plate (1) to secure the relative positions of the adjacent metal plates (1). A heat-insulating panel that can be freely assembled to cover the outer peripheral surface of various target devices. 2. The heat insulating material holder (3) is a bolt member (4) welded to the metal plate (1), and a fitting member (5) to be externally fitted to the tip of the bolt member (4). ) Is the heat insulating panel according to claim 1. 3. The metal band (8) for covering the joint between the adjacent metal plates (1) is provided on at least one side of the periphery of the metal plates (1). Insulation panel.