WO2019123677A1 - Heat-retention block and method of manufacturing heat-retention block - Google Patents

Abstract

A heat-retention block (1) comprises a bag body (2) in which a metal foil material (25) is interposed between an inner bag body (23) and an outer bag body (24) in an integrated manner, wherein the inside of the inner bag body (23) is filled with a laminated body (3) in which a heat-insulating material (31) and a metal plate material (32) are laminated in this order from an installation surface portion (21) to an upper-surface portion (22) of the bag body (2).

Description

Heat retention block and method of manufacturing heat retention block

The present invention relates to a heat retaining block and a method of manufacturing the heat retaining block.
Priority is claimed on Japanese Patent Application No. 2017-244225, filed Dec. 20, 2017, the content of which is incorporated herein by reference.

In general, the turbine casings of steam turbines and gas turbines (hereinafter collectively referred to as "turbine generators") used in power plants, chemical plants, etc. are vertically separated from the central axis of the rotating part such as a rotor. 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 by bolts at their respective flange portions.
In addition, a stationary portion such as a stationary blade is provided on the inner surface of the turbine casing. A rotating portion such as a rotor mounted with moving blades is horizontally penetrated in the turbine casing so as to be concentric with the stationary portion. The rotating portion is rotatably supported.

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

As such an installation structure to the turbine casing of a heat retention block, a thing as shown to FIG. 5 (A) is known.
Specifically, a plurality of cotton-like heat insulating materials 102 and heat retaining blocks 103 are alternately stacked on the surface portion of the turbine casing 101, and a plurality of stud bolts 104 are heat insulating materials 102 and heat retaining at predetermined intervals. It is inserted into an insertion hole 105 formed in the block 103 and fixed to the turbine casing 101.

By the way, as for a turbine generator, a casing is opened at the time of regular inspection work. Therefore, since it is necessary to attach and detach a heat retention block from a turbine casing each time, it is desirable for the installation structure to the turbine casing of a heat retention block to be a structure which can perform attachment or detachment operation easily.
However, in the fixing structure of the heat retaining block disclosed in FIG. 5A to the turbine casing, it is necessary to laminate the heat insulating material 102 and the heat retaining block 103 in a plurality of layers, which requires many work processes and requires a large number of installation steps. It has become a thing.

In order to solve such problems, the present inventors have proposed a heat insulating structure for a turbine casing that can be installed simply and quickly, and can shorten the construction period and reduce maintenance costs. (Patent Document 1).

Specifically, as shown in FIG. 5B, a heat insulating block 201 disposed 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. And a belt 205 provided at one end with a hook 204 which is engaged with the mesh member 203.

Patent No. 5836155 specification

In the above-mentioned patent documents 1, each heat retention block is fixed to a surface of a turbine casing by a dedicated mounting bracket. For this reason, it is possible to prevent each heat retention block from slipping off from the turbine casing, maintain the adhesion of each heat retention block to the turbine casing, and enhance the heat retention performance.

By the way, the turbine generator should be regularly maintained by the operator in order to check if the internal structure including the internal lubricating oil system, control oil system, and bearings etc. is damaged or corroded. Work is being done.
In such maintenance work, the worker may move on the heat retention block or work on the heat retention block, but at that time, since the load of the worker is applied in the thickness direction of the heat retention block, the heat retention is performed. There is a possibility that the block may be deformed in the thickness direction.

Thus, when the heat retention block is deformed in the thickness direction, a gap is generated between adjacent heat retention blocks. Moreover, since the uniformity of the height of each heat retention block is not maintained, it is feared that the uniform heat retention effect can not be acquired in the whole turbine casing, and the deterioration of the operating efficiency of a turbine generator is caused.

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

Therefore, the present invention secures the strength of the whole heat retention block, thereby suppressing the occurrence of deformation or damage even when an external force is applied to the heat retention block, and capable of maintaining the heat retention performance over a long period of time, And a method of manufacturing the heat retention block.

The present invention adopts the following means in order to solve the above problems.
That is, the heat retaining block according to one aspect of the present invention has a mounting surface portion installed on one surface side of the installation object, and a surface portion on the surface opposite to the mounting surface portion, and the inner bag body and the outer bag body A bag having a double structure, a metal foil material interposed between the inner bag and the outer bag of the bag, and the inner surface of the inner bag of the bag from the installation surface portion The heat insulating material which consists of an inorganic fiber material toward the said surface part, and the laminated body laminated | stacked in order of the metal plate material are provided.

Here, since the bag body of the heat retention block has a double structure of the inner bag body and the outer bag body, it is possible to maintain the strength of the entire bag body, and deterioration of the bag body with the passage of use period Damage can be prevented.

In addition, the bag body can be stably installed with respect to the installation object by having the installation surface portion installed on the one surface side of the installation object and the surface portion on the surface opposite to the installation surface portion. it can. Furthermore, when the bag is made of an inorganic fiber material, the bag can also have a certain degree of heat retention.

Also, by having the metal foil material interposed between the inner bag and the outer bag, the bag can have a laminated structure of the inner bag, the metal foil, and the outer bag. Thus, the strength of the entire bag can be maintained, and when an external force is applied to the bag, the load due to the external force can be dispersed by the metal foil material. This makes it possible to prevent the shape of the entire heat retaining block from being lost.

Further, by providing a laminated body in which the heat insulating material and the metal plate material are laminated in the order from the installation surface to the surface of the bag inside the inner bag of the bag, the installation object of the heat retaining block is Since the heat insulating material is disposed on the side close to the turbine casing, the heat retention effect can be further enhanced.
Furthermore, since the metal plate material is disposed on the surface portion side of the bag body, when a load from above acts on the heat retention block, the load is dispersed by the metal plate material to block the propagation to the heat insulating material. As a result, it is possible to prevent the whole shape of the heat retaining block from being deformed.

In addition, when the metal foil material is a stainless steel foil, it is possible to secure a certain strength despite its thin thickness, and because it is excellent in heat resistance, deformation of the shape due to temperature change even if used for a long time Can be prevented.

In addition, when the metal plate material is an expanded metal made of a stainless steel material in which a large number of through holes are formed, the load can be dispersed efficiently while securing a certain strength while being lightweight. Furthermore, since the heat resistance is also excellent, it is possible to prevent the deformation of the shape due to the temperature change.

Further, when the bag body is a glass cloth made of woven glass fiber, it is possible to suppress the release of heat to the outside, and it is possible to maintain heat retention while maintaining a certain strength while being lightweight. Therefore, it is possible to prevent the aged deterioration.

In addition, when the surface portion of the bag is coated with silicon, the waterproof function of the entire heat retaining block can be enhanced, and the surface portion of the bag is less likely to be contaminated with dust and the like, so the appearance The appearance above is also good.

When the heat insulating material is selected from bio-soluble fibers and rock wool, the material of the heat insulating material can be appropriately changed and used according to the place where the heat retention block is installed.
For example, in the case of installing a heat retention block on the surface of a turbine casing as an installation target, a biosoluble fiber having a high heat insulation effect is used as a heat insulating material used for the heat retention block installed in a portion close to a heat source. On the other hand, as the heat insulating material used for the heat insulating block installed at a position away from the heat source, rock wool which is inferior in the heat insulating effect but cost superior can be used.

Also, in the case where the outer peripheral edge of the surface portion of the bag has a double edge formed by sewing in a state of being folded in a valley shape toward the inside of the bag along the peripheral direction. Since it is possible to further strengthen the strength of the outer peripheral edge of the surface portion of the bag body that is easily damaged, even if a load is applied to the surface portion of the bag body, the shape retention and damage of the heat retaining block can be prevented. Can.

In order to achieve the above object, the heat retention block according to one aspect of the present invention has a first installation surface section installed on the installation object on one side, and a first installation surface section opposite to the first installation surface section. 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 of the first bag body and the first outer side A first heat insulating block having a first metal foil material interposed between bags, and a first heat insulating material made of inorganic fiber material inside the first inner bag of the first bag. And a second mounting surface portion placed on the first surface portion of the first bag body on one surface side, and a second surface portion on the surface opposite to the second mounting surface portion, A second bag comprising a double structure of a second inner bag and a second outer bag, between the second inner bag and the second outer bag of the second bag Second metal foil material inserted A second heat insulating material made of an inorganic fiber material from the second installation surface to the second surface portion inside the second inner bag of the second bag; A second heat retaining block having a laminated body laminated in the order of metal plate material, and an intermediate portion between the first surface portion of the first bag and the second installation surface of the second bag. And a mounted second metal plate.

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

In addition, a first bag body has a first installation surface portion installed on the installation object on one surface side, and a first bag body having a first surface portion on the surface opposite to the first installation surface portion. By having it, a 1st bag body can be stably installed with respect to an installation target object.
Furthermore, when the first bag is made of an inorganic fiber material, the first bag can also have a certain degree of heat retention.

In addition, the first bag body includes the first metal foil material interposed between the first inner bag body and the first outer bag body, whereby the first bag body is formed into the first inner bag. Since the laminated structure of the body, the first metal foil material, and the first outer bag can be made, 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, thereby preventing the shape loss of the entire first heat retaining block. be able to.

When the first heat insulating material is provided inside the first inner bag of the first bag, the first heat insulating material emits, for example, a turbine casing as an installation object of the first heat insulating block. Since the heat generated can be prevented from being dissipated to the outside, the heat retention of the installation object can be enhanced.

In addition, since the second bag of the second heat retaining block is a double structure of the second inner bag and the second outer bag, the entire strength of the second bag can be maintained. As a result, it is possible to prevent the deterioration and damage of the bag body with the passage of use period.

In addition, a second bag body having a second installation surface portion on which the second heat retention block is installed on the installation object on one side, and a second surface portion on the surface opposite to the second installation surface portion By having it, a 2nd bag can be stably installed with respect to an installation target object.
Furthermore, when the second bag is made of an inorganic fiber material, the second bag can also have a certain degree of heat retention.

In addition, 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. You can keep it. 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, thereby preventing the shape loss of the entire second heat retention block. be able to.

In addition, since the second heat insulating material and the first metal plate material are laminated in order from the second installation surface of the second bag to the second surface, first, the second heat retaining block Since the second heat insulating material is disposed on the side close to the turbine casing to be installed, it is possible to further enhance the heat retention effect.
Furthermore, since the first metal plate material is disposed on the second surface portion side of the second bag body, when a load from above is applied to the second heat retention block, the load is set to the first The metal plate material can be dispersed to block the propagation to the second heat insulating material and the first heat retaining block, so that the whole shape of the heat retaining block can be prevented from being deformed.

Also, a second heat retention block is provided by including a second metal plate interposed between the first surface portion of the first bag and the second installation surface portion of the second bag. Even if a load is applied in the thickness direction from the second surface portion side of the second bag 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 retaining block to the first heat retaining block, the shape retention and damage of the first heat retaining block and the second heat retaining block can be prevented, and heat retention can be prevented. It is possible to maintain the heat retention of the block as a whole.

In addition, when the first metal foil material and the second metal foil material are stainless steel foils, it is possible to secure a certain strength despite being thin. Moreover, since it is excellent also in heat resistance performance, the deformation | transformation of the shape accompanying a temperature change can be prevented.

Also, in the case of the expanded metal in which the first metal plate material and the second metal plate material are formed with a large number of through holes, the load is efficiently dispersed while securing a certain strength while being lightweight. Can be done.
Furthermore, since the heat resistance is also excellent, it is possible to prevent the deformation of the shape due to the temperature change.

In the case where the first heat insulating material is a biosoluble fiber and the second heat insulating material is rock wool, the first heat insulating material is installed in a portion close to the heat source of the turbine casing surface as the installation object of the heat retention block. As a heat insulation material used for a heat retention block, the heat insulation effect can be exhibited to the maximum by using the bio-soluble fiber with a high heat insulation effect.
On the other hand, as a heat insulating material used for the 2nd heat retention block installed in the position away from a heat source, although the heat insulation effect is inferior, by using rock wool which is superior in cost, it is cheap, but constant heat insulation effect You can earn

In order to achieve the above object, the method for manufacturing the heat retaining block of the present invention comprises the steps of: forming a bag fabric by interposing a metal foil between the inner bag fabric and the outer bag fabric; From the above, an installation surface portion installed on one surface side of the installation object, and a surface portion disposed on the surface opposite to the installation surface portion to form a bag body having a double structure of an inner bag body and an outer bag body And a step of laminating a heat insulating material and a metal plate material in order from the installation surface to the surface inside the inner bag.

Here, by providing a step of interposing a metal foil material between the inner bag body fabric and the outer bag body fabric to form the bag body fabric, the bag body is formed of the inner bag body fabric, the metal foil material, and the outer bag Since it is possible to use a laminated structure composed of body cloth, the strength of the entire bag can be kept constant. Further, even when an external force is applied to the heat retention block, the load due to the external force can be dispersed by the metal foil material, so that the bag body can be prevented from being damaged.

In addition, the bag body fabric is provided with a step of forming a bag body having a surface portion on the installation surface portion installed on one surface side of the installation object and a surface opposite to the installation surface portion from the bag body fabric. By forming into a shape, it can be installed on the surface of the turbine casing as the installation object of the heat retention block after filling the inside of the bag body with a laminate made of a heat insulating material and a metal plate material described later.

In addition, the inside of the bag body is filled with the heat insulating material and the metal plate material by providing a step of laminating the heat insulating material and the metal plate material in order from the installation surface to the surface portion inside the inner bag body. Can be generated.
At this time, since the heat insulating material and the metal plate material are stacked in this order from the installation surface to the surface of the bag, the heat insulating material is disposed on the side close to the turbine casing to be the installation target of the heat retention block. The heat retention effect can be further enhanced.
Furthermore, since the metal plate material is disposed on the surface portion side of the bag body, when a load acts from the surface portion side of the heat retention block in the thickness direction of the heat insulation block, the load is dispersed by the metal plate material to the heat insulator. Since it is possible to block the propagation, it is possible to prevent the whole shape of the heat retention block from being lost.

In addition, the step of producing the bag body fabric includes the step of sewing together the inner bag body fabric, the metal foil material, and the outer bag body fabric to produce the bag body fabric, Since the metal foil material and the outer bag fabric can be configured as an integral laminate, the strength of the bag can be further enhanced.

In order to achieve the above object, a method of manufacturing a heat retaining block according to the present invention comprises a first bag in which a first metal foil is interposed between a first inner bag fabric and a first outer bag fabric. A step of producing a body fabric, a first installation surface portion installed on the installation object on one side of the first bag body fabric, and a first surface portion on a surface opposite to the first installation surface portion Forming a first bag comprising a double structure of a first inner bag and a first outer bag, and filling a first heat insulating material in the inside of the first inner bag. Manufacturing a first heat retaining block having the steps of: forming a second bag fabric by interposing a second metal foil between the second inner bag fabric and the second outer bag fabric; A second installation surface section installed on the installation object on one side from the second bag body fabric, and a second surface section on the surface opposite to the second installation surface section, Forming a second bag consisting of a double structure of two inner bags and a second outer bag; inside the second inner bag from the second installation surface portion to the second Manufacturing a second heat retaining block having a step of laminating a second heat insulating material and a first metal plate material in order toward the surface portion; and on the first surface portion of the first bag body And a step of mounting the second installation surface portion of the second bag body to integrate the first heat retention block and the second heat retention block.

Here, as a method of manufacturing the first heat retention block, the first metal foil material is interposed between the first inner bag fabric and the first outer bag fabric to generate the first bag fabric. The first bag body can be made to have a laminated structure composed of the first inner bag body fabric, the first metal foil material, and the first outer bag body fabric by having the step of The strength of the entire first bag can be kept constant.
Further, even when an external force is applied to the first heat retention block, the load due to the external force can be dispersed by the first metal foil material, so that the damage of the first bag can be prevented.

Further, as a method of manufacturing the first heat retaining block, the first installation surface portion installed on the installation object on the one surface side of the first bag body fabric, and the first surface on the opposite side to the first installation surface portion By forming the first bag body into a bag shape by forming the first bag body including the surface portion, the first heat insulating material described later is filled in the first bag body. In addition, it can be installed on the turbine casing surface as an installation object of the first heat retention block.

Further, as a method of manufacturing the first heat retaining block, the inside of the first inner bag of the first bag is filled with the first heat insulating material, so that the inside of the first bag is thermally insulated. Material can be filled to create the first heat retaining block.

Also, as a method of manufacturing the second heat retention block, a second metal foil material is interposed between the second inner bag fabric and the second outer bag fabric to generate the second bag fabric. Having the step enables the second bag to have a laminated structure configured of the second inner bag fabric, the second metal foil material, and the second outer bag fabric. The strength of the entire bag of 2 can be kept constant.
Further, even when an external force is applied to the second heat retention block, the load due to the external force can be dispersed by the second metal foil material, so that the damage of the second bag can be prevented.

In addition, as a method of manufacturing the second heat retaining block, the second installation surface portion installed on the installation object on the one surface side from the second bag body fabric, and the second installation surface portion on the opposite side to the second installation surface portion By forming the second bag body fabric into a bag shape by forming the second bag body including the surface portion, the second heat insulating material described later and the first metal plate material are used as the second bag material. The second heat retaining block is placed in the bag body and then placed on the first surface portion of the first heat retaining block described above.

In addition, as a method of manufacturing the second heat retention block, a second heat insulating material from the second installation surface to the second surface portion inside the second inner bag of the second bag, and By having the step of laminating the metal plate materials in order of 1, it is possible to fill the second bag body with the second heat insulating material and the first metal plate material to generate the second heat retention block.
At this time, since the second heat insulating material and the first metal plate are laminated in this order from the second installation surface of the second bag to the first surface, the second heat retaining block Since the second heat insulating material is disposed on the side close to the turbine casing when installed in the first heat retaining block, the heat retaining effect can be further enhanced.
Furthermore, since the first metal plate material is disposed on the second surface portion side of the second bag body, when a load is applied in the thickness direction from the second surface portion side of the second heat retention block, The load can be dispersed by the first metal plate to block the propagation to the second heat insulating material and the first heat retaining block, so that the whole shape of the heat retaining block can be prevented from being deformed.

In the case where the step of integrating the first heat retaining block and the second heat retaining block includes interposing the second metal plate between the first heat retaining block and the second heat retaining block, The second surface of the second bag of the second heat retention block can be interposed between the first heat retention block and the first heat retention block, since a second metal plate can be interposed as a reinforcing material. Even if a load is applied from the part side in the thickness direction, 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 retaining block to the first heat retaining block, the shape retention and damage of the first heat retaining block and the second heat retaining block can be prevented, and heat retention can be prevented. It is possible to maintain the heat retention of the block as a whole.

In addition, the step of producing the first bag body cloth includes the step of sewing together the first inner bag body cloth, the first metal foil, and the first outer bag body cloth, When the step of producing the bag body fabric includes the step of sewing together 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 respectively formed as an integral laminate. It is possible to further increase the strength of the first bag and the second bag.

According to the present invention, by securing the strength of the entire heat retaining block, the heat retaining block can be prevented from losing its shape even when an external force is applied to the heat retaining block, and the heat retaining performance can be maintained for a long time.

It is an exploded perspective view of a heat retention block concerning a 1st embodiment of the present invention. It is a divided side view of the heat retention block which concerns on the 1st Embodiment of this invention. It is XX sectional drawing of the heat retention block shown to FIG. 1B. It is a disassembled perspective view of the heat retention block which concerns on the 2nd Embodiment of this invention. It is a side view of the heat retention block which concerns on the 2nd Embodiment of this invention. It is YY sectional drawing of the heat retention block shown to FIG. 3 (B). It is sectional drawing of fixing structure to the turbine casing of the heat retention block which is prior art. It is a perspective view of fixation structure to a turbine casing of a heat retention block which is prior art.

Hereinafter, an embodiment of the present invention relating to a heat retaining block and a method for manufacturing the heat retaining block will be described with reference to the drawings and provided for understanding of the present invention.
In the drawings, for convenience of explanation, in the state where the heat retention block is installed on the installation object, the direction from the surface of the heat retention block to the installation surface is defined as the thickness direction and the direction perpendicular to the thickness direction is as the horizontal .

Example 1
First, the entire configuration of the heat retention block according to the first embodiment of the present invention will be described with reference to FIGS. 1 (A), 1 (B), and 2.
The heat insulation block 1 covers and heats up the turbine casing surface 5 of a turbine generator used as an installation object, for example, in a power plant etc. The heat insulation material 31 and metal plate material are contained in the substantially cubic bag 2 A stack 3 in which 32 is stacked is filled.

Here, the shape of the heat retaining block 1 does not necessarily have to be cubic. It may have any shape as long as it has a fixed volume, such as a rectangular parallelepiped shape or a cylindrical shape.

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

Here, the bag 2 does not necessarily have to be a glass cloth material made of woven glass fiber. For example, it can select suitably from inorganic fiber materials, such as carbon fiber.
However, since the bag 2 is required to have a certain degree of strength, it is preferable that the bag 2 be a glass cloth material having the highest strength and cost cost-effectiveness.

Moreover, the metal foil material 25 does not necessarily have to be a stainless steel material. It can select suitably from other metal foil materials, such as copper foil material, aluminum foil material, and nickel foil material.
However, since the turbine generator as the installation target of the heat retention block 1 has a relatively high temperature, it is preferable to use a stainless material having a high heat resistance effect from the viewpoint of heat resistance performance.

Moreover, the inner bag body 23, the metal foil material 25, and the outer bag body 24 do not necessarily have to be sewed and integrated.
The metal foil material 25 may only be interposed between the inner bag 23 and the outer bag 24. However, when the inner bag body 23, the metal foil material 25, and the outer bag body 24 are integrated by sewing to form a bag fabric, the metal foil material 25 is used as the inner bag body 23, and the outer bag body. The inner bag body 23, the metal foil material 25, and the outer bag body 24 are integrated by sewing because they do not move relative to 24 and the overall strength of the bag body 2 can also be enhanced. Is preferred.

The outer peripheral edge 26 of the surface portion 22 of the bag 2 is, as shown in the enlarged view of FIG. 2, by the yarn material 27 in a state of being folded in a valley shape toward the inside of the bag 2 A sewn double edge 28 is formed.

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

The laminate 3 is laminated in the inner bag 23 in the order of the heat insulating material 31 and the metal plate 32 from the installation surface 21 of the bag 2 toward the surface 22. The heat insulating material 31 can be appropriately selected from, for example, bio-soluble fibers, rock wool, glass fibers, and ceramic fibers.
The metal plate 32 is an expanded metal made of a stainless steel 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 natural material made of polystyrene resin or a foamed plastic material made of a hydrocarbon type, a cellulose fiber, a wool material or the like.
However, since the turbine generator which is the installation object of the heat retention block 1 has a high temperature, it is preferable that the heat insulator 31 be made of an inorganic fiber material excellent in heat retention performance. In particular, it is more preferable to use a biosoluble fiber, since the biosoluble fiber has a higher heat insulating effect than rock wool.

Further, the metal plate 32 does not necessarily have to be an expanded metal in which a large number of through holes are formed.
For example, the metal plate material in which the through hole is not formed may be used.
However, when the metal plate material 32 is an expanded metal, when a load acts from the surface portion 22 of the heat insulation block 1 in the thickness direction, the load material can be efficiently dispersed. It is preferably metal.

Also, the metal plate 32 does not necessarily have to be a stainless steel.
For example, other metal plate materials such as a copper material, an aluminum material, and a nickel material can be appropriately selected.
However, since the turbine generator as the installation target of the heat retention block 1 has a relatively high temperature, it is preferable to use a stainless 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 2 by a known attachment method such as heat welding, for example.

Here, the surface portion 22 of the bag 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 waterproofing material 4, the waterproofness of the entire heat retention block 1 is enhanced, and dirt and the like on the surface portion 22 of the bag body 2 are hardly attached. In addition, it is preferable that the surface portion 22 of the bag body 2 be covered with the waterproof material 4 because the appearance appearance is also good.

In addition, it is not necessary to cover the surface portion 22 of the bag 2 with the waterproof material 4 as a separate member as the waterproofing process of the surface portion 22 of the bag 2.
For example, the outer pouch 24 of the surface portion 22 of the pouch 2 may be coated with silicon.

Example 2
Next, the heat retention block 1 which concerns on the 2nd Embodiment of this invention is demonstrated based on FIG. 3 (A), FIG. 3 (B), and FIG. In addition, while attaching | subjecting the code | symbol same about the part which overlaps with 1st Embodiment, it abbreviate | omits about the overlapping description.

The heat retaining block 1 according to the second embodiment includes a first heat retaining block 1a directly covering the turbine casing surface 5 to be installed with the heat retaining block 1, and a first heat retaining block 1a stacked on the first heat retaining block 1a. It consists of two heat retention blocks 1b.

The first heat insulating block 1a is filled with a first heat insulating material 31a made of a biosoluble fiber material in a first bag body 2a of a glass cloth material made of woven glass fiber.
In the second heat retention block 1b, a second heat insulating material 31b made of rock wool and a first metal plate 32a are laminated in a second bag body 2b of a glass cloth material made of woven glass fiber. 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 close to the heat source, as the first heat insulating material 31a, a biosoluble fiber having a high heat insulating effect is provided. Can be used to maximize the thermal insulation effect.
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, it is inexpensive by using rock wool which is inferior in heat insulation effect but cost superior. However, it is possible to obtain a certain heat insulation effect.

The first bag body 2a is a surface on the opposite side of the first installation surface portion 21a installed on the turbine casing surface 5 which is the installation object of the first heat retention block 1a, and the first installation surface portion 21a. The first inner bag body 23a and the first outer bag body 24a disposed outside the first inner bag body 23a have a double structure as well as having the first surface portion 22a.
A first metal foil 25a made of a thin stainless steel is interposed between the first inner bag 23a and the first outer bag 24a, and the first inner bag 23a, the first The metal foil material 25a and the first outer bag body 24a are sewed and integrated.

The second bag body 2b includes a second installation surface 21b installed on the first surface 22a of the first heat retention block 1a, which is the installation object of the second heat retention block 1b, and a second installation surface 21b. And a second outer bag body 24b disposed on the outside of the second inner bag body 23b and the second inner bag body 23b. It has a double structure.
A second metal foil member 25b made of a thin stainless steel is interposed between the second inner bag 23b and the second outer bag 24b, and the second inner bag 23b, the second metal. The foil material 25b and the second outer bag body 24b are sewed and integrated.

The first outer peripheral edge 26a of the first surface portion 22a of the first bag 2a and the second outer peripheral edge 26b of the second surface 22b of the second bag 2b are the first embodiment. As shown in FIGS. 3 (A), 3 (B) and 4, the first bag body 2 a and the second bag body 2 b extend along the circumferential direction as in the heat retention book 1 according to the embodiment. The first double edge 28a and the second double edge 28b sewed by the thread material 27 in a valley-folded state are formed.

Here, since it is difficult for an external force to act directly on the first heat retention block 1a, a constant strength can be secured as the whole heat retention block 1 without forming the first double edge 28a.
Therefore, at least the second double edge 28b may be formed on the second heat retaining block 2b to which the external force is likely to be directly applied, and the first double edge 28a is not necessarily formed on the first bag body 2a. Need not be formed.

The outer peripheral edge of each of the second surface portion 22a of the first heat retaining block 2a and the second installation surface portion 21b of the second heat retaining block 2b is, for example, L-shaped as shown in FIG. 3B. The third metal foil member 25c may be partially interposed.
By partially interposing the third metal foil member 25c in this manner, even when the first double edge 28a is not formed, a certain rigidity can be secured.

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

The second surface 22b of the second bag 2b is covered with a waterproof material 4 in which a silicon material is applied to a glass material. The waterproof material 4 is sewed on the second surface portion 22b of the second bag 2b by a known bonding means such as heat welding, for example.

Like the first metal plate 32a, a second metal plate 32b made of expanded metal made of stainless steel and having a large number of through holes is formed between the first heat retaining block 1a and the second heat retaining block 1b. It is interspersed.

Here, the second metal plate 32b does not have to be interposed between the first heat retaining block 1a and the second heat retaining block 1b.
However, since the second metal plate is interposed between the first heat retention block 1a and the second heat retention block 1b, the load in the thickness direction of the heat retention block 1 can be dispersed. It is possible to prevent the whole shape of the heat retaining block from being deformed and to maintain the heat retaining effect for a long time.

The first heat retention block 1a and the second heat retention block 1b are in such a state that the second heat retention block 1b is relatively shifted in the horizontal direction with respect to the first heat retention block 1a (stepwise in the thickness direction) The contact surfaces of the first heat retaining block 1a and the second heat retaining block 1b are fixed and integrated by known fixing means such as sewing.
The heat insulation block 1 configured in this manner is disposed in the longitudinal and lateral directions of the turbine casing surface 5 and is fixed by a dedicated fixing bracket.

Here, the heat retaining block 1 does not necessarily have to be stacked such that the second heat retaining block 1 b is formed stepwise with respect to the first heat retaining block 1 a in the thickness direction.
For example, the first heat retaining block 1a and the second heat retaining block 1b may be stacked and arranged so as to be linear in the thickness direction.
However, the second heat retaining block 1b is stacked in a step-like manner in the thickness direction with respect to the first heat retaining block 1a to form between adjacent heat retaining blocks 1 arranged on the turbine casing surface 5 Since it is possible to minimize the gap that is generated, the heat dissipation to the outside can be reduced and the heat retention performance can be further enhanced.

As described above, the heat retaining block according to the present invention and the method for manufacturing the heat retaining block secure the strength of the entire heat retaining block, thereby suppressing the occurrence of deformation or damage even when an external force is applied to the heat retaining block. It is possible to maintain the performance.

While the preferred embodiments of the present invention have been described above in detail, the present invention is not limited to such specific embodiments, and various modifications may be made within the scope of the present invention as set forth in the appended claims. Modifications and changes are possible.

The present invention is applicable to a heat retaining block and a method of manufacturing the heat retaining block.

DESCRIPTION OF SYMBOLS 1 heat retention block 1a 1st heat retention block 1b 2nd heat retention block 2 bag body 2a 1st bag body 2b 2nd bag body 21 installation surface part 21a 1st installation surface part 21b 2nd installation surface part 22 surface part 22a First surface portion 22b Second surface portion 23 inner bag 23a first inner bag 23b second inner bag 24 outer bag 24a first outer bag 24b second outer bag 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 28b Second double edge 3 Laminate 31 Thermal insulation 31a First thermal insulation 31b Second thermal insulation 32 Metal plate 32a First metal plate 32b Second metal plate Material 4 Waterproof material 5 Turbine casing surface

Claims (14)

1. An installation surface section installed on one surface side of the installation object, a surface section on the surface opposite to the installation surface section, and a bag body having a double structure of an inner bag body and an outer bag body;
   A metal foil material interposed between the inner bag and the outer bag of the bag;
   Inside the inner bag of the bag, a heat insulator made of an inorganic fiber material from the installation surface to the surface, and a laminate laminated in the order of metal plate materials,
   Insulating block equipped with
2. The metal foil material is stainless steel foil,
   The heat retention block according to claim 1, wherein the metal plate material is an expanded metal made of a stainless steel material in which a large number of through holes are formed.
3. The heat retention block according to claim 1 or 2, wherein the bag body is a glass cloth made of woven glass fiber.
4. The heat retention block according to any one of claims 1 to 3, wherein a silicon coating is applied to the surface portion of the bag body.
5. The heat insulating block according to any one of claims 1 to 4, wherein the heat insulating material is selected from bio-soluble fibers, rock wool, glass fibers and ceramic fibers.
6. The outer peripheral edge of the surface portion of the bag has a double edge formed by sewing in a state of being folded in a valley shape toward the inside of the bag along the circumferential direction. The heat retention block as described in any one of 1 to 5.
7. A first installation surface section installed on the installation object on one side, and a first surface section on the surface opposite to the first installation surface section, and a first inner bag body and a first outer bag body A first bag body having a double structure, a first metal foil material interposed between the first inner bag body of the first bag body and the first outer bag body, A first heat retaining block having a first heat insulating material made of an inorganic fiber material inside the first inner bag of one bag;
   A second mounting surface portion placed on the first surface portion of the first bag body on one side, and a second surface portion on the surface opposite to the second mounting surface portion; A second bag comprising a double structure of an inner bag and a second outer bag, the second bag being interposed between the second inner bag and the second outer bag. A second metal foil material, an inorganic fiber material which is inside the second inner bag of the second bag and directed from the second installation surface to the second surface; A second heat insulating block having a heat insulating material of No. 2 and a laminated body laminated in the order of the first metal plate material;
   A heat retention block comprising: a second metal plate interposed between the first surface portion of the first bag and the second installation surface of the second bag.
8. The first metal foil material and the second metal foil material are stainless steel foils,
   The heat retention block according to claim 7, wherein the first metal plate material and the second metal plate material are expanded metal in which a large number of through holes are formed.
9. The first heat insulating material is a biosoluble fiber,
   The heat retention block according to claim 7 or 8, wherein the second heat insulating material is rock wool.
10. Interposing a metal foil between the inner bag body fabric and the outer bag body fabric to produce the bag body fabric;
    It has an installation surface part installed on one surface side of the installation object from the bag body fabric, and a surface part disposed on the surface opposite to the installation surface part, and has a double structure of an inner bag body and an outer bag body Forming a bag;
    Laminating in the order of the heat insulating material and the metal plate material from the installation surface to the surface inside the inner bag;
    A method of manufacturing a heat insulation block comprising:
11. The method of manufacturing a heat retaining block according to claim 10, wherein the step of producing the bag body dough includes a step of sewing together the inner bag body dough, the metal foil and the outer bag body dough.
12. Forming a first bag cloth by interposing a first metal foil between the first inner bag cloth and the first outer bag cloth, from the first bag cloth to the other side A first installation surface section installed on an installation object, and a first surface section on the surface opposite to the first installation surface section, and a double of a first inner bag body and a first outer bag body Manufacturing a first heat retaining block having the steps of: forming a first bag of a structure; filling the first inner bag with a first heat insulating material;
    Forming a second bag fabric by interposing a second metal foil between the second inner bag fabric and the second outer bag fabric, from the second bag fabric to one side A second installation surface section to be installed on the installation object, and a second surface section on the surface opposite to the second installation surface section, and a double of the second inner bag body and the second outer bag body Forming a second bag of the structure; inside the second inner bag, a second heat insulating material from the second installation surface toward the second surface, and a first Manufacturing a second heat retaining block having a step of laminating in order of metal plate material;
    The second installation surface of the second bag is placed on the first surface of the first bag to integrate the first heat retaining block and the second heat retaining block. And a process for producing a heat insulation block.
13. Integrating the first heat retention block and the second heat retention block;
    The method for manufacturing a heat retention block according to claim 12, comprising the step of interposing a second metal plate between the first heat retention block and the second heat retention block.
14. The step of producing the first bag body fabric comprises
    Sewing together the first inner pouch fabric, the first metal foil, and the first outer pouch fabric;
    The step of producing the second bag body fabric comprises
    The method according to claim 12 or 13, further comprising the step of sewing together the second inner bag body cloth, the second metal foil, and the second outer bag body cloth. .

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