JP6921235B2 - Insulation block and manufacturing method of insulation block - Google Patents

Description

The present invention relates to a heat insulating block and a method for manufacturing the heat insulating block.
The present application claims priority based on Japanese Patent Application No. 2017-244225 filed in Japan on December 20, 2017, the contents of which are incorporated herein by reference.

Generally, steam turbines and gas turbines (hereinafter collectively referred to as "turbine generators") used in power plants and chemical plants have turbine casings that move up and down with the central axis of the rotating part of the rotor or the like as a boundary. It is divided into two parts, and has a structure in which an upper casing and a lower casing having a substantially semicircular cross section are fastened with bolts at their respective flanges.
Further, a stationary portion such as a stationary blade is provided on the inner surface of the turbine casing. Inside the turbine casing, rotating parts such as rotors to which moving blades are attached are horizontally pierced so as to be concentric with the stationary parts. The rotating part is rotatably supported.

Here, when the turbine or the like is operated, a fluid such as a high-temperature or high-pressure gas flows inside the turbine casing. At this time, the narrower the clearance between the stationary system and the rotating system, the less fluid leaks, and more energy can be transferred to the rotating system.
On the other hand, since the temperature of the exhaust gas flowing inside is very high, the outer surface of the turbine casing of the turbine generator is usually covered with a heat insulating block made of a heat-resistant heat insulating material in order to prevent heat dissipation.

As a structure for installing such a heat insulating block on the turbine casing, for example, the one shown in FIG. 5A is known.
Specifically, a plurality of cotton-like heat insulating materials 102 and heat insulating blocks 103 are alternately laminated on the surface of the turbine casing 101, and a plurality of stud bolts 104 are laminated with the heat insulating material 102 and heat insulating blocks 103 at predetermined intervals. It is inserted into the insertion hole 105 formed in the block 103 and fixed to the turbine casing 101.

By the way, the casing of the turbine generator is opened during regular inspection work. Therefore, since it is necessary to attach / detach the heat insulating block from the turbine casing each time, it is desirable that the structure for installing the heat insulating block on the turbine casing is such that the attachment / detachment work can be easily performed.
However, in the structure of fixing the heat insulating block to the turbine casing disclosed in FIG. 5A, since it is necessary to stack the heat insulating material 102 and the heat insulating block 103 in a plurality of layers, the number of work steps is increased and a large number of installation man-hours are required. It has become a thing.

To solve such a problem, the present inventors have proposed a heat insulating structure for a turbine casing, which can be easily and quickly constructed, shorten the construction period, and reduce the maintenance cost. (Patent Document 1).

Specifically, as shown in FIG. 5B, a heat insulating block 201 arranged so as to cover the surface of the turbine casing and a through hole 202 provided so as to penetrate the heat insulating block 201 in the thickness direction. The belt 205 is provided with a hook 204 at one end, which is inserted into and locked to the mesh member 203.

Patent No. 5836155

In Patent Document 1, each of the heat insulating blocks is fixed to the surface of the turbine casing by a dedicated mounting bracket. Therefore, it is possible to prevent each heat insulating block from slipping off the turbine casing, maintain the adhesion of each heat insulating block to the turbine casing, and improve the heat insulating performance.

By the way, the turbo generator is regularly maintained by an operator in order to confirm that the internal structure including the internal lubricating oil system, control oil system, and bearing portion is not damaged or corroded. Work is being done.
In such maintenance work, the worker may move on the heat insulating block or work on the heat insulating block, but at that time, the load of the worker is applied in the thickness direction of the heat insulating block, so that the heat insulating block is kept warm. There is a risk that the block will be deformed in the thickness direction.

When the heat insulating blocks are deformed in the thickness direction in this way, a gap is generated between the adjacent heat insulating blocks. Further, since the height uniformity of each heat insulating block is not maintained, it is not possible to obtain a uniform heat insulating effect in the entire turbine casing, and there is a concern that the operating efficiency of the turbine generator may be deteriorated.

In addition, when the operator moves on the heat insulating block, the bag body constituting the heat insulating block is damaged and the heat insulating material filled inside the bag body is exposed to the outside, so that the heat insulating effect of the heat insulating block is improved. There is also concern that it will be reduced.

Therefore, according to the present invention, by ensuring the strength of the entire heat-retaining block, it is possible to suppress the occurrence of shape loss and damage even when an external force is applied to the heat-retaining block, and to maintain the heat-retaining performance for a long period of time. And a method for manufacturing a heat insulating block.

In order to achieve the above object, the heat insulating block according to one aspect of the present invention has a first installation surface portion to be installed on an installation object on one surface side, and a first surface portion on a surface opposite to the first installation surface portion. A first bag body including a surface portion and having a double structure of a first inner bag body and a first outer bag body, the first inner bag body and the first outer side of the first bag body. A first heat insulating block having a first metal foil material inserted between the bag bodies and a first heat insulating material made of an inorganic fiber material inside the first inner bag body of the first bag body. A second installation surface portion mounted on the first surface portion of the first bag body is included on one surface side, and a second surface portion is included on the surface opposite to the second installation surface portion. A second bag body having a double structure of a second inner bag body and a second outer bag body, between the second inner bag body and the second outer bag body of the second bag body. From the inserted second metal foil material, from the inorganic fiber material inside the second inner bag body of the second bag body from the second installation surface portion toward the second surface portion. A second heat insulating block having a laminated body in which the second heat insulating material and the first metal plate material are laminated in this order, the first surface portion of the first bag body, and the second bag body. A second metal plate material interposed between the second installation surface portions of the above is provided.

Here, since the first bag body of the first heat insulating block has a double structure of the first inner bag body and the first outer bag body, the overall strength of the first bag body is maintained. Therefore, it is possible to prevent deterioration and damage of the bag body with the lapse of the period of use.

Further, the first bag body has a first installation surface portion to be installed on the installation object on one surface side, and a first bag body having a first surface portion on a surface opposite to the first installation surface portion. By having the first bag, the first bag can be stably installed on the object to be installed.
Further, since the first bag body is made of an inorganic fiber material, the first bag body can also have a certain degree of heat retention.

Further, the first bag body has a first metal foil material interposed between the first inner bag body and the first outer bag body, so that the first bag body becomes the first inner bag. Since the body, the first metal foil material, and the first outer bag can be laminated, the overall strength of the first bag can be maintained.
Further, when an external force is applied to the first bag body, the load due to the external force can be dispersed by the first metal foil material, so that the shape of the entire first heat insulating block is prevented from being lost. be able to.

Further, when the first heat insulating material is provided inside the first inner bag body of the first bag body, the first heat insulating material can be used as an installation target of the first heat insulating block, for example, from a turbine casing. Since it is possible to prevent the heat generated from being dissipated to the outside, it is possible to improve the heat retention of the object to be installed.

Further, since the second bag body of the second heat insulating block has a double structure of the second inner bag body and the second outer bag body, it is possible to maintain the overall strength of the second bag body. Therefore, it is possible to prevent deterioration and damage of the bag body with the lapse of the usage period.

Further, the second heat insulating block has a second bag body having a second installation surface portion installed on the installation object on one surface side and a second surface portion on a surface opposite to the second installation surface portion. By holding the second bag, the second bag can be stably installed on the object to be installed.
Further, since the second bag body is made of an inorganic fiber material, the second bag body can also have a certain degree of heat retention.

Further, the second bag body has a second metal foil material interposed between the second inner bag body and the second outer bag body, so that the overall strength of the second bag body can be increased. Can be kept. Further, when an external force is applied to the second bag body, the load due to the external force can be dispersed by the second metal foil material, so that the shape of the entire second heat insulating block is prevented from being lost. be able to.

Further, since the second heat insulating material and the first metal plate material are laminated in this order from the second installation surface portion of the second bag body to the second surface portion, first, the second heat insulating block Since the second heat insulating material is arranged on the side close to the turbine casing to be installed, the heat retaining effect can be further enhanced.
Further, since the first metal plate material is arranged on the second surface side of the second bag body, when a load from above acts on the second heat insulating block, the load is applied to the first. Since it is possible to disperse the metal plate material and block the propagation to the second heat insulating material and the first heat insulating block, it is possible to prevent the entire heat insulating block from losing its shape.

Further, the heat insulating block is provided with a second metal plate material interposed between the first surface portion of the first bag body and the second installation surface portion of the second bag body, whereby the second heat insulating block is provided. Even if a load is applied in the thickness direction from the second surface portion side of the second bag body of the block, this load can be dispersed by the second metal plate material.
Therefore, since it is possible to block the propagation of the load from the second heat insulating block to the first heat insulating block, it is possible to prevent the first heat insulating block and the second heat insulating block from getting out of shape or being damaged, and to keep warm. The heat retention of the block as a whole can be maintained.

Further, when the first metal foil material and the second metal foil material are stainless steel foils, it is possible to secure a certain strength while being thin. In addition, since it has excellent heat resistance, it is possible to prevent the shape from being deformed due to a temperature change.

Further, when the first metal plate material and the second metal plate material are expanded metals in which a large number of through holes are formed, the load is efficiently dispersed while ensuring a certain strength while being lightweight. Can be done.
Further, since it has excellent heat resistance, it is possible to prevent the shape from being deformed due to a temperature change.

When the first heat insulating material is biosoluble fiber and the second heat insulating material is rock wool, the first heat insulating material is installed near the heat source on the surface of the turbine casing as the installation target of the heat insulating block. As the heat insulating material used for the heat insulating block, a biosoluble fiber having a high heat insulating effect can be used to maximize the heat insulating effect.
On the other hand, as the heat insulating material used for the second heat insulating block installed at a position away from the heat source, rock wool, which is inferior in heat insulating effect but superior in terms of cost, is used, so that it is inexpensive but has a certain heat insulating effect. Can be obtained.

In order to achieve the above object, the method for producing a heat insulating block of the present invention comprises interposing a first metal foil between a first inner bag body cloth and a first outer bag body cloth to form a first bag. The process of producing the body cloth, the first installation surface portion to be installed on the installation object on one side from the first bag body cloth, and the first surface portion on the surface opposite to the first installation surface portion. A step of forming a first bag body including a double structure of a first inner bag body and a first outer bag body, the inside of the first inner bag body is filled with a first heat insulating material. A process of manufacturing a first heat insulating block having a step and a second metal foil are interposed between the second inner bag body cloth and the second outer bag body cloth to generate a second bag body cloth. A second installation surface portion to be installed on the installation object on one surface side from the second bag body cloth, and a second surface portion on the surface opposite to the second installation surface portion A step of forming a second bag body having a double structure of an inner bag body and a second outer bag body, inside the second inner bag body, from the second installation surface portion to the second surface. A step of manufacturing a second heat insulating block having a step of laminating a second heat insulating material and a first metal plate material in this order toward the portion, and a step of manufacturing the first surface portion of the first bag body. A step of mounting the second installation surface portion of the second bag body to integrate the first heat insulating block and the second heat insulating block is provided , and the first heat insulating block and the second heat insulating block are integrated. The step of integrating the two heat insulating blocks includes a step of interposing a second metal plate material between the first heat insulating block and the second heat insulating block.

Here, as a method for manufacturing the first heat insulating block, a first bag body cloth is generated by interposing a first metal foil material between the first inner bag body cloth and the first outer bag body cloth. By having the above-mentioned step, the first bag body can be made into a laminated structure composed of the first inner bag body cloth, the first metal foil material, and the first outer bag body cloth. The strength of the entire first bag body can be kept constant.
Further, even when an external force is applied to the first heat insulating block, the load due to the external force can be dispersed by the first metal foil material, so that damage to the first bag body can be prevented.

Further, as a method for manufacturing the first heat insulating block, a first installation surface portion to be installed on the installation object on one surface side from the first bag body cloth, and a first surface portion on the surface opposite to the first installation surface portion. By having a step of forming the first bag body including the surface portion, the first bag body fabric is formed into a bag body shape, so that the first heat insulating material described later is filled in the first bag body. The first heat insulating block can be installed on the surface of the turbine casing as an object to be installed.

Further, as a method for manufacturing the first heat insulating block, a step of filling the inside of the first inner bag body of the first bag body with the first heat insulating material is provided to insulate the inside of the first bag body. The material can be filled to produce a first thermal insulation block.

Further, as a method for producing the second heat insulating block, a second bag body cloth is produced by interposing a second metal foil material between the second inner bag body cloth and the second outer bag body cloth. By having the process, it is possible to form the second bag body into a laminated structure composed of the second inner bag body cloth, the second metal foil material, and the second outer bag body cloth. The strength of the entire bag body of 2 can be kept constant.
Further, even when an external force is applied to the second heat insulating block, the load due to the external force can be dispersed by the second metal foil material, so that damage to the second bag body can be prevented.

Further, as a method for manufacturing the second heat insulating block, a second installation surface portion to be installed on the installation object on one surface side from the second bag body cloth, and a second installation surface portion on the surface opposite to the second installation surface portion. By having a step of forming a second bag body including a surface portion, the second bag body fabric is made into a bag body shape, so that the second heat insulating material and the first metal plate material described later are secondly formed. The second heat insulating block is installed after being filled in the bag body. It can be installed on the first surface portion of the first heat insulating block described above.

Further, as a method for manufacturing the second heat insulating block, a second heat insulating material and a second heat insulating material are provided inside the second inner bag of the second bag from the second installation surface portion to the second surface portion. By having the step of laminating the metal plate materials in the order of 1, the second heat insulating material and the first metal plate material can be filled in the inside of the second bag body to generate the second heat insulating block.
At this time, since the second heat insulating material and the first metal plate material are laminated in this order from the second installation surface portion of the second bag body to the first surface portion, the second heat insulating block is placed on the second heat insulating block. Since the second heat insulating material is arranged on the side close to the turbine casing when installed in the heat insulating block 1, the heat insulating effect can be further enhanced.
Further, since the first metal plate material is arranged on the second surface portion side of the second bag body, when a load is applied from the second surface portion side of the second heat insulating block in the thickness direction, the load is applied. Since the load can be dispersed by the first metal plate material to block the propagation to the second heat insulating material and the first heat insulating block, it is possible to prevent the entire heat insulating block from losing its shape.

Further, when the step of integrating the first heat insulating block and the second heat insulating block includes a step of interposing a second metal plate material between the first heat insulating block and the second heat insulating block, when the step includes interposing a second metal plate material between the first heat insulating block and the second heat insulating block, Since it is possible to interpose a second metal plate material as a reinforcing material between the first heat insulating block and the first heat insulating block, the second surface of the second bag body of the second heat insulating block Even if a load is applied in the thickness direction from the portion side, this load can be dispersed by the second metal plate material.
Therefore, since it is possible to block the propagation of the load from the second heat insulating block to the first heat insulating block, it is possible to prevent the first heat insulating block and the second heat insulating block from getting out of shape or being damaged, and to keep warm. The heat retention of the block as a whole can be maintained.

Further, the step of producing the first bag body cloth includes a step of integrally sewing the first inner bag body cloth, the first metal foil, and the first outer bag body cloth, and the second When the step of producing the bag body fabric includes a step of integrally sewing the second inner bag body fabric, the second metal foil, and the second outer bag body fabric, the first inner bag The body cloth, the first metal foil material, the first outer bag body cloth, and the second inner bag body cloth, the second metal foil material, and the second outer bag body cloth are each configured as an integral laminate. Therefore, the strength of the first bag body and the second bag body can be further increased.

According to the present invention, by ensuring the strength of the entire heat-retaining block, it is difficult for the heat-retaining block to lose its shape even when an external force is applied, and the heat-retaining performance can be maintained for a long period of time.

It is an exploded perspective view of the heat insulation block which concerns on 1st Embodiment of this invention. It is a partial side view of the heat insulation block which concerns on 1st Embodiment of this invention. It is XX sectional view of the heat insulation block shown in FIG. 1B. It is an exploded perspective view of the heat insulation block which concerns on 2nd Embodiment of this invention. It is a side view of the heat insulation block which concerns on 2nd Embodiment of this invention. It is a YY cross-sectional view of the heat insulation block shown in FIG. 3 (B). It is sectional drawing of the fixed structure to the turbine casing of the heat insulation block which is a prior art. It is a perspective view of the fixed structure to the turbine casing of the heat insulation block which is a prior art.

Hereinafter, embodiments of the present invention relating to the heat insulating block and the method for manufacturing the heat insulating block will be described with reference to the drawings, and the present invention will be understood.
In each figure, for convenience of explanation, the direction from the surface portion of the heat insulating block to the installation surface portion is defined as the thickness direction, and the direction perpendicular to the thickness direction is defined as the horizontal direction when the heat insulating block is installed on the installation object. ..

<Example 1>
First, the overall configuration of the heat insulating block according to the first embodiment of the present invention will be described with reference to FIGS. 1 (A), 1 (B), and FIG.
The heat insulating block 1 covers the turbine casing surface 5 of a turbine generator used in, for example, a power plant or the like as an installation object to keep warm, and a heat insulating material 31 and a metal plate material are contained in a substantially cubic bag body 2. The laminated body 3 in which 32 is laminated is filled.

Here, the shape of the heat insulating block 1 does not necessarily have to be a cube shape. Any shape may be used as long as it has a certain volume, such as a rectangular parallelepiped shape or a cylindrical shape.

The bag body 2 is a glass cloth material made by weaving glass fibers as an inorganic fiber material, and has an installation surface portion 21 installed on the turbine casing surface 5 as an installation target of the heat insulating block 1 and an installation surface portion 21. Has a surface portion 22 which is the opposite surface, and has a double structure including an inner bag body 23 and an outer bag body 24 arranged outside the inner bag body 23.
A metal foil material 25 made of a thin stainless steel material is interposed between the inner bag body 23 and the outer bag body 24, and the inner bag body 23, the metal foil material 25, and the outer bag body 24 are sewn together. It is integrated.

Here, the bag body 2 does not necessarily have to be a glass cloth material made by weaving glass fibers. For example, an inorganic fiber material such as carbon fiber can be appropriately selected.
However, since the bag body 2 is required to have a certain level of strength, it is preferable that the bag body 2 is a glass cloth material having the highest cost-effectiveness in terms of strength and cost.

Further, the metal foil material 25 does not necessarily have to be a stainless steel material. It can be appropriately selected from other metal foil materials such as copper foil material, aluminum foil material, and nickel foil material.
However, since the turbine generator for which the heat insulating block 1 is installed has a relatively high temperature, it is preferable to use a stainless steel material having a high heat resistance effect from the viewpoint of heat resistance performance.

Further, the inner bag body 23, the metal foil material 25, and the outer bag body 24 do not necessarily have to be sewn and integrated.
The metal foil material 25 may only be interposed between the inner bag body 23 and the outer bag body 24. However, the inner bag body 23, the metal foil material 25, and the outer bag body 24 are integrated by sewing to generate a bag body fabric, so that the metal foil material 25 becomes the inner bag body 23 and the outer bag body. Since it does not move with respect to 24 and the strength of the bag body 2 as a whole can be increased, the inner bag body 23, the metal foil material 25, and the outer bag body 24 are integrated by sewing. Is preferable.

As shown in the enlarged view of FIG. 2, the outer peripheral edge 26 of the surface portion 22 of the bag body 2 is folded in a valley fold toward the inside of the bag body 2 along the peripheral edge direction by the thread material 27. It forms a sewn double edge 28.

Here, the double edge portion 28 does not necessarily have to be formed only on the outer peripheral edge 26 of the surface portion 22 of the bag body 2.
For example, the double edge portion 28 may be formed on other edge edges such as the outer peripheral edge portion of the installation surface portion 21.
However, when a load in the thickness direction is applied from the surface portion 22 of the heat insulating block 1, the largest load is likely to be applied to the outer peripheral edge 26 of the surface portion 22, so that at least the outer peripheral edge 26 of the surface portion 22 is affected. It suffices if the double edge portion 28 is formed.

The laminated body 3 is laminated in the inner bag body 23 in the order of the heat insulating material 31 and the metal plate material 32 from the installation surface portion 21 to the surface portion 22 of the bag body 2. The heat insulating material 31 can be appropriately selected from, for example, biosoluble fibers, rock wool, glass fibers, and ceramic fibers.
Further, the metal plate material 32 is an expanded metal made of a stainless steel material in which a large number of through holes are formed.

Here, the heat insulating material 31 does not necessarily have to be selected from biosoluble fibers, rock wool, glass fibers, and ceramic fibers.
For example, it may be a foamed plastic material made of polystyrene resin or a hydrocarbon type, or a natural material made of cellulose fiber, wool material, or the like.
However, since the turbine generator to which the heat insulating block 1 is installed has a high temperature, it is preferable that the heat insulating material 31 is made of an inorganic fiber material having excellent heat retaining performance. In particular, since biosoluble fibers have a higher heat insulating effect than rock wool, it is more preferable to use biosoluble fibers.

Further, the metal plate material 32 does not necessarily have to be an expanded metal in which a large number of through holes are formed.
For example, it may be a metal plate material in which no through hole is formed.
However, when the metal plate material 32 is an expanded metal, the load can be efficiently dispersed when a load is applied from the surface portion 22 of the heat insulating block 1 in the thickness direction, so that the metal plate material 32 is expanded. It is preferably metal.

Further, the metal plate material 32 does not necessarily have to be a stainless steel material.
For example, it can be appropriately selected from other metal plate materials such as copper material, aluminum material, and nickel material.
However, since the turbine generator for which the heat insulating block 1 is installed has a relatively high temperature, it is preferable to use a stainless steel material having a high heat resistance effect from the viewpoint of heat resistance performance.

The surface portion 22 of the bag body 2 is covered with a waterproof material 4 in which a glass cloth material is coated with silicon. The waterproof material 4 is attached to the surface portion 22 of the bag body 2 by a known attachment means such as heat welding.

Here, the surface portion 22 of the bag body 2 does not necessarily have to be covered with the waterproof material 4.
However, since the surface portion 22 of the bag body 2 is covered with the waterproof material 4, the waterproof property of the heat insulating block 1 as a whole is enhanced, and the surface portion 22 of the bag body 2 is less likely to be contaminated with dust or the like. Moreover, since the appearance is also good, it is preferable that the surface portion 22 of the bag body 2 is covered with the waterproof material 4.

Further, as a waterproof treatment for the surface portion 22 of the bag body 2, it is not always necessary to cover the surface portion 22 of the bag body 2 with the waterproof material 4 as a separate member.
For example, the outer bag body 24 of the surface portion 22 of the bag body 2 may be coated with silicon.

<Example 2>
Next, the heat insulating block 1 according to the second embodiment of the present invention will be described with reference to FIGS. 3 (A), 3 (B), and 4. The parts that overlap with the first embodiment are designated by the same reference numerals, and the overlapping description will be omitted.

The heat insulating block 1 according to the second embodiment has a first heat insulating block 1a that directly covers the surface 5 of the turbine casing to which the heat insulating block 1 is installed, and a first heat insulating block 1a laminated on the first heat insulating block 1a. It is composed of 2 heat insulating blocks 1b.

In the first heat insulating block 1a, a first heat insulating material 31a made of a biosoluble fiber material is filled in a first bag body 2a of a glass cloth material made by weaving glass fibers.
Further, in the second heat insulating block 1b, a second heat insulating material 31b made of rock wool and a first metal plate material 32a are laminated in a second bag body 2b of a glass cloth material made by weaving glass fibers. The laminated body 3 is filled.

Here, it is not always necessary to select a biosoluble fiber material as the first heat insulating material 31a and rock wool as the second heat insulating material 31b.
For example, rock wool may be selected as the first heat insulating material 31a, and a biosoluble fiber material may be selected as the second heat insulating material 31b.
However, since the first heat insulating block 1a filled with the first heat insulating material 31a is installed on the turbine casing surface 5 near the heat source, the biosoluble fiber having a high heat insulating effect is used as the first heat insulating material 31a. By using, the heat insulating effect can be maximized.
On the other hand, as the second heat insulating material 31b used for the second heat insulating block 1b installed at a position away from the heat source, rock wool, which is inferior in heat insulating effect but superior in cost, is inexpensive. However, a certain heat insulating effect can be obtained.

The first bag body 2a is a surface opposite to the first installation surface portion 21a installed on the turbine casing surface 5 which is the installation target of the first heat insulating block 1a and the first installation surface portion 21a. It has a first surface portion 22a and has a double structure including a first inner bag body 23a and a first outer bag body 24a arranged outside the first inner bag body 23a.
A first metal foil material 25a made of a thin stainless steel material is interposed between the first inner bag body 23a and the first outer bag body 24a, and the first inner bag body 23a and the first outer bag body 24a The metal foil material 25a and the first outer bag body 24a are sewn and integrated.

The second bag body 2b has a second installation surface portion 21b installed on the first surface portion 22a of the first heat insulation block 1a to which the second heat insulation block 1b is installed, and a second installation surface portion 21b. It has a second surface portion 22b which is a surface opposite to the above, and is composed of a second inner bag body 23b and a second outer bag body 24b arranged outside the second inner bag body 23b. It has a double structure.
A second metal foil material 25b made of a thin stainless steel material is interposed between the second inner bag body 23b and the second outer bag body 24b, and the second inner bag body 23b and the second metal The foil material 25b and the second outer bag body 24b are sewn and integrated.

The first outer peripheral edge 26a of the first surface portion 22a of the first bag body 2a and the second outer peripheral edge 26b of the second surface portion 22b of the second bag body 2b are the first implementation. Similar to the heat insulation book 1 according to the embodiment, the first bag body 2a and the second bag body 2b are inside along the peripheral direction as shown in FIGS. 3 (A), 3 (B), and 4. The first double edge portion 28a and the second double edge portion 28b sewn by the thread material 27 are formed in a state of being folded in a valley fold toward.

Here, since it is difficult for an external force to act directly on the first heat insulating block 1a, it is possible to secure a certain strength as the entire heat insulating block 1 without forming the first double edge portion 28a.
Therefore, it is sufficient that at least the second double edge portion 28b is formed on the second heat retaining block 2b on which an external force is likely to act directly, and the first bag body 2a does not necessarily have the first double edge portion 28a. Does not have to be formed.

The outer peripheral edges of the second surface portion 22a of the first heat insulating block 2a and the second installation surface portion 21b of the second heat insulating block 2b have an L-shape as shown in FIG. 3B, for example. The third metal foil material 25c may be partially interposed.
By partially interposing the third metal foil material 25c in this way, it is possible to secure a certain rigidity even when the first double edge portion 28a is not formed.

The laminate 3 is formed in the second inner bag body 23b, and the second heat insulating material 31b and the first metal from the second installation surface portion 21b to the second surface portion 22b of the second bag body 2b. The plate members 32a are laminated in this order.
Further, the first metal plate material 32a is an expanded metal made of a stainless steel material in which a large number of through holes are formed.

The second surface portion 22b of the second bag body 2b is covered with a waterproof material 4 in which a glass material is coated with silicon. The waterproof material 4 is sewn to the second surface portion 22b of the second bag body 2b by a known sticking means such as heat welding.

Between the first heat insulating block 1a and the second heat insulating block 1b, a second metal plate material 32b made of an expanded metal made of a stainless steel material having a large number of through holes formed is formed like the first metal plate material 32a. It is being mediated.

Here, it is not always necessary that the second metal plate member 32b is interposed between the first heat insulating block 1a and the second heat insulating block 1b.
However, since the second metal plate material is interposed between the first heat insulating block 1a and the second heat insulating block 1b, it is possible to disperse the load in the thickness direction of the heat insulating block 1. It is possible to prevent the entire heat insulating block from losing its shape and maintain the heat insulating effect for a long period of time.

The first heat insulating block 1a and the second heat insulating block 1b are arranged so that the second heat insulating block 1b is displaced relative to the first heat insulating block 1a in the horizontal direction (stepped in the thickness direction). The contact surfaces of the first heat insulating block 1a and the second heat insulating block 1b are fixed and integrated by a known fixing means such as sewing.
The heat insulating block 1 configured in this way is arranged in the vertical and horizontal directions of the turbine casing surface 5 and is fixed by a dedicated fixing bracket.

Here, the heat insulating block 1 does not necessarily have to be laminated so that the second heat insulating block 1b is stepped with respect to the first heat insulating block 1a in the thickness direction.
For example, the first heat insulating block 1a and the second heat insulating block 1b may be laminated so as to be linear in the thickness direction.
However, since the second heat insulating block 1b is laminated with respect to the first heat insulating block 1a in a stepped manner in the thickness direction, it is formed between the adjacent heat insulating blocks 1 arranged on the turbine casing surface 5. Since it is possible to minimize the gaps formed, the heat dissipation to the outside can be reduced and the heat retention performance can be further improved.

As described above, the heat insulating block and the method for manufacturing the heat insulating block according to the present invention suppress the occurrence of shape loss and damage even when an external force is applied to the heat insulating block by ensuring the strength of the entire heat insulating block, and keep the heat insulating for a long period of time. The performance can be maintained.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various aspects are described within the scope of the claims of the present invention. It can be transformed and changed.

The present invention is applicable to a heat insulating block and a method for producing a heat insulating block.

1 Heat insulation block 1a First heat insulation block 1b Second heat insulation block 2 Bag body 2a First bag body 2b Second bag body 21 Installation surface part 21a First installation surface part 21b Second installation surface part 22 Surface part 22a Second 1 Surface part 22b Second surface part 23 Inner bag body 23a First inner bag body 23b Second inner bag body 24 Outer bag body 24a First outer bag body 24b Second outer bag body 25 Metal foil material 25a First metal foil material 25b Second metal foil material 25c Third metal foil material 26 Outer peripheral edge 26a First outer peripheral edge 26b Second outer peripheral edge 27 Thread material 28 Double edge 28a First Double edge part 28b Second double edge part 3 Laminated body 31 Insulation material 31a First insulation material 31b Second insulation material 32 Metal plate material 32a First metal plate material 32b Second metal plate material 4 Waterproof material 5 Turbine casing surface

Claims (5)

A first installation surface portion to be installed on an object to be installed on one surface side, and a surface opposite to the first installation surface portion includes a first surface portion, and a first inner bag body and a first outer bag body. The first bag body having the double structure of the above, the first metal foil material inserted between the first inner bag body and the first outer bag body of the first bag body, the first. A first heat insulating block having a first heat insulating material made of an inorganic fiber material inside the first inner bag body of the first bag body, and
A second installation surface portion mounted on the first surface portion of the first bag body is included on one surface side, and a second surface portion is included on the surface opposite to the second installation surface portion. A second bag body having a double structure of an inner bag body and a second outer bag body, inserted between the second inner bag body and the second outer bag body of the second bag body. A second metal foil material made of an inorganic fiber material inside the second inner bag body of the second bag body from the second installation surface portion toward the second surface portion. A second heat insulating block having a laminated body in which two heat insulating materials and a first metal plate material are laminated in this order, and a second heat insulating block.
A heat insulating block comprising a second metal plate material interposed between the first surface portion of the first bag body and the second installation surface portion of the second bag body. The first metal foil material and the second metal foil material are stainless steel foils.
The heat insulating block according to claim 1 , wherein the first metal plate material and the second metal plate material are expanded metals having a large number of through holes formed therein. The first heat insulating material is a biosoluble fiber and is
It said second insulation, heat insulation block according to claim 1 or claim 2 which is rock wool. A step of forming a first bag body cloth by interposing a first metal foil between the first inner bag body cloth and the first outer bag body cloth, from the first bag body cloth to one side. The first installation surface portion to be installed on the installation object, the surface opposite to the first installation surface portion includes the first surface portion, and the first inner bag body and the first outer bag body are doubled. A step of forming a first bag body having a structure, a step of manufacturing a first heat insulating block having a step of filling the inside of the first inner bag body with a first heat insulating material, and a step of manufacturing the first heat insulating block.
A step of forming a second bag body cloth by interposing a second metal foil between the second inner bag body cloth and the second outer bag body cloth, from the second bag body cloth to one side. A second installation surface portion to be installed on the installation object, a surface opposite to the second installation surface portion includes a second surface portion, and a double inner bag body and a second outer bag body are provided. A step of forming a second bag body having a structure, a second heat insulating material inside the second inner bag body from the second installation surface portion toward the second surface portion, and a first. A step of manufacturing a second heat insulating block having a step of laminating metal plates in this order, and a step of manufacturing the second heat insulating block.
The second installation surface portion of the second bag body is placed on the first surface portion of the first bag body to integrate the first heat insulating block and the second heat insulating block. With the process ,
The step of integrating the first heat insulating block and the second heat insulating block is
A method for manufacturing a heat insulating block, which comprises a step of interposing a second metal plate material between the first heat insulating block and the second heat insulating block. The step of producing the first bag body dough is
The step of integrally sewing the first inner bag body cloth, the first metal foil, and the first outer bag body cloth is included.
The step of producing the second bag body dough is
The method for manufacturing a heat insulating block according to claim 4 , further comprising a step of integrally sewing the second inner bag body fabric, the second metal foil, and the second outer bag body fabric.

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