JP7499034B2 - Heat retention device for piping and heating device for piping - Google Patents

Description

The present invention relates to an insulation device for keeping piping warm, and a heating device equipped with the insulation device.

In manufacturing processes for producing semiconductor devices, liquid crystal panels, LEDs, solar cells, etc., process gas is introduced into a process chamber to perform various processes such as etching and CVD. The process gas introduced into the process chamber is exhausted by a vacuum pump device, and depending on the type of gas, it may be exhausted to an exhaust gas treatment device.

The process gas in the process chamber may turn into by-products with high sublimation temperatures due to the reaction of multiple gases. If the temperature of the piping extending from the process chamber to the vacuum pump device, or from the vacuum pump device to the exhaust gas treatment device, is low, the by-products may solidify in the piping and cause the piping to become clogged. Furthermore, if the solidified by-products enter the vacuum pump device, they may impede the rotation of the pump rotor, causing the pump rotor to slow down and, in the worst case, causing the vacuum pump device to stop operating. Therefore, in order to prevent the by-products from solidifying in the piping, a heater is attached to the piping to heat it.

JP 2015-69931 A

Traditionally, glass wool and rock wool have been used as insulation materials for pipes or heaters. Recently, rigid urethane foams with lower thermal conductivity have been attracting attention. However, while rigid urethane foams have excellent insulating properties, they also have low flexibility and rigidity. For this reason, when rigid urethane foams are attached to or removed from pipes, they may crack, resulting in a decrease in insulating performance. In particular, when the thickness of rigid urethane foam is increased to improve insulating performance, rigidity increases but flexibility decreases. For this reason, when a force exceeding the load capacity is applied to rigid urethane foam, cracks may occur over a wide area of the rigid urethane foam.

Therefore, the present invention provides a heat-insulating device that can prevent or minimize cracking of heat-insulating materials with low flexibility and rigidity. The present invention also provides a heating device equipped with such a heat-insulating device.

In one aspect, a heat insulation device for a pipe is provided, which comprises a heat insulation member having an inner peripheral surface with a diameter larger than the outer diameter of the pipe, and a reinforcing layer covering at least a portion of the heat insulation member, the heat insulation member being made of a resin foam material, the heat insulation member having a plurality of divided bodies having dividing surfaces extending in the longitudinal direction thereof, and the reinforcing layer covering at least one of the inner and outer surfaces of the plurality of divided bodies.

In one embodiment, the resin foam is a phenolic resin foam.
In one embodiment, the reinforcing layer covers the inner surfaces, the outer surfaces, and the divided surfaces of the plurality of segments.
In one embodiment, the heat retaining member has a thermal conductivity of 0.05 W/(mK) or less.
In one embodiment, the reinforcing layer is a coating film made of a polymer material.
In one aspect, the reinforcing layer comprises at least a metal.
In one aspect, each of the plurality of segments has at least one dividing surface.
In one embodiment, the dividing surface is a cut surface extending in the longitudinal direction of the heat-insulating member.
In one embodiment, the dividing surface is a slit formed on an inner or outer surface of the divider.
In one embodiment, the slit includes a first slit and a second slit that intersect with each other.
In one embodiment, the dividing surface is a cut surface perpendicular to the longitudinal direction of the heat-insulating member.
In one embodiment, the dividing surface is a semi-cylindrical cut surface extending along the inner circumferential surface of the heat-insulating member.

In one aspect, a heat insulation device for a pipe is provided, which includes a heat insulation member having an inner peripheral surface with a diameter larger than the outer diameter of the pipe, the heat insulation member being made of a resin foam material, the heat insulation member having a plurality of divided bodies having dividing surfaces extending in the longitudinal direction thereof, and each of the plurality of divided bodies having at least one dividing surface.

In one embodiment, the dividing surface is a cut surface extending in the longitudinal direction of the heat-insulating member.
In one embodiment, the dividing surface is a slit formed on an inner or outer surface of the divider.
In one embodiment, the slit includes a first slit and a second slit that intersect with each other.
In one embodiment, the dividing surface is a cut surface perpendicular to the longitudinal direction of the heat-insulating member.
In one embodiment, the dividing surface is a cut surface having a semi-cylindrical shape extending along the inner circumferential surface of the heat-insulating member.

In one aspect, a heating device is provided, comprising a heater, an insulating material covering an outer surface of the heater, and the heat-retaining device covering the outer surface of the insulating material.
In one embodiment, the heat-insulating material has a heat-resistance temperature higher than the heat-insulating member of the heat-insulating device.

According to the present invention, the mechanical strength of the heat-insulating member is improved by a reinforcing layer attached to the inner and/or outer surface of the heat-insulating member. Therefore, even if force is applied to the heat-insulating device when attaching or detaching the heat-insulating device to the piping, the heat-insulating member is unlikely to crack. Furthermore, according to the present invention, even if a crack does occur in the heat-insulating member, the dividing surface can stop the crack from growing.

FIG. 1 is a perspective view showing one embodiment of an insulation device attached to a pipe. FIG. 2 is a perspective view showing a state in which the heat retention device shown in FIG. 1 is removed from the piping. FIG. 3 is a cross-sectional view of the heat retention device shown in FIG. 2 . FIG. 11 is a cross-sectional view showing another embodiment of the heat retention device. FIG. 11 is a cross-sectional view showing still another embodiment of the heat retention device. FIG. 11 is a cross-sectional view showing still another embodiment of the heat retention device. FIG. 11 is a perspective view showing still another embodiment of the heat retention device. FIG. 11 is a perspective view showing still another embodiment of the heat retention device. FIG. 11 is a perspective view showing still another embodiment of the heat retention device. FIG. 11 is a perspective view showing still another embodiment of the heat retention device. FIG. 11 is a perspective view showing still another embodiment of the heat retention device. FIG. 11 is a perspective view showing still another embodiment of the heat retention device. FIG. 11 is a perspective view showing still another embodiment of the heat retention device. FIG. 11 is a perspective view showing still another embodiment of the heat retention device. FIG. 11 is a perspective view showing still another embodiment of the heat retention device. FIG. 2 is a perspective view showing a heating device attached to a pipe. FIG. 2 is a perspective view showing the heating device removed from the piping. FIG. 11 is a side view showing a heating device as a comparative example. 11A to 11C are cross-sectional views showing modified examples of the dividing surface and/or the partition surface of the heat-insulating member. 11A to 11C are cross-sectional views showing modified examples of the dividing surface and/or the partition surface of the heat-insulating member. 11A to 11C are cross-sectional views showing modified examples of the dividing surface and/or the partition surface of the heat-insulating member.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The heat retaining device and the heating device described below are used for heating piping. Although the piping is not particularly limited, examples of the piping include piping for transferring process gas used in the manufacturing process of manufacturing semiconductor devices, liquid crystal panels, LEDs, solar cells, etc. to a vacuum pump, and piping for transferring process gas from the vacuum pump to a detoxification device.

Figure 1 is a perspective view showing one embodiment of an insulation device attached to a pipe, Figure 2 is a perspective view showing the insulation device shown in Figure 1 removed from the pipe, and Figure 3 is a cross-sectional view of the insulation device shown in Figure 2. The insulation device 1 comprises an insulation member 7 having an inner circumferential surface 5 with a diameter larger than the outer diameter of the pipe 2, and a reinforcing layer 10 covering at least a part of the insulation member 7. The insulation member 7 has a plurality of division bodies 8 divided along its longitudinal direction. Each division body 8 has a division surface 8a extending in the longitudinal direction of the insulation member 7. When the insulation member 7 is attached to the pipe 2, the division surfaces 8a of the plurality of division bodies 8 come into contact with each other.

In this embodiment, the heat retaining member 7 is composed of two divided bodies 8. The inner surface 8b of each divided body 8 has a semi-cylindrical shape. The heat retaining member 7 composed of divided bodies 8 of such a shape can be easily attached to the outer surface of the pipe 2, and can be easily removed from the outer surface of the pipe 2. In one embodiment, the heat retaining member 7 may be divided into three or more divided bodies 8.

The heat retaining member 7, which is composed of the divided body 8, is composed of a resin foam material with a thermal conductivity of 0.05 W/(mK) or less. In this embodiment, the heat retaining member 7 is composed of a phenolic resin foam material. The phenolic resin foam material is a foamed polymer resin containing phenol, and has a low thermal conductivity. In this embodiment, the heat retaining member 7 is composed of a phenolic resin foam material with a thermal conductivity of 0.05 W/(mK) or less, preferably 0.03 W/(mK) or less.

The reinforcing layer 10 covers the outer surfaces 8c (see FIG. 3) of the multiple segments 8. The reinforcing layer 10 is attached to the outer surface 8c of each segment 8. In this embodiment, the outer surface 8c of each segment 8 has a semicylindrical shape. Therefore, the reinforcing layer 10 covering the outer surface 8c of each segment 8 also has a semicylindrical shape.

In this embodiment, the reinforcing layer 10 is a coating film made of a polymer material. An example of the polymer material that makes up the coating film is polyurea resin. The reinforcing layer 10 made of such a coating film can protect the heat-insulating member 7 from impacts and external forces, and can prevent the heat-insulating member 7 from cracking. Furthermore, the reinforcing layer 10 made of a polymer material can protect the heat-insulating member 7 from heat.

In one embodiment, the reinforcing layer 10 may include a metal such as an aluminum tape or a metal plate instead of or in addition to the coating film described above. The aluminum tape and the metal plate can protect the heat-insulating member 7 from impact and external force, and can prevent the heat-insulating member 7 from cracking. Furthermore, the aluminum tape and the metal plate can protect the heat-insulating member 7 from heat. The aluminum tape is a flexible metal tape and has an adhesive surface. The aluminum tape can be fixed to the divided body 8 by attaching this adhesive surface to the outer surface 8c of the divided body 8. The metal plate is a thin plate made of a metal such as aluminum or stainless steel. The metal plate has a shape that follows the shape of the outer surface 8c of the divided body 8. The method of fixing the metal plate to the divided body 8 is not particularly limited. For example, the metal plate may be fixed to the divided body 8 with a screw having a low thermal conductivity, or the metal plate may be fixed to the divided body 8 with an adhesive.

In one embodiment, the reinforcing layer 10 may be a polyimide tape. The polyimide tape is a polyimide film with an adhesive surface. The polyimide tape has excellent heat resistance and can protect the heat retaining member 7 from impacts and external forces.

As shown in FIG. 2, the heat-insulating member 7 is divided into a plurality of segments 8, and the reinforcing layer 10 is fixed to each segment 8, so that the heat-insulating device 1 can be easily attached to the pipe 2 and can be easily removed from the pipe 2. There are no particular limitations on the mechanism for fixing the heat-insulating device 1 to the pipe 2, so long as it does not apply excessive force to the heat-insulating member 7. For example, the mechanism for fixing the heat-insulating device 1 to the pipe 2 can be a removable metal fitting, jacket, or tape that surrounds the outer surface of the heat-insulating device 1.

Figures 4 to 6 are cross-sectional views showing other embodiments of the heat retention device 1. The configurations of the embodiments shown in Figures 4 to 6 that are not specifically described are the same as those of the embodiment described with reference to Figures 1 to 3, and therefore will not be described again.

In the embodiment shown in FIG. 4, the reinforcing layer 10 covers the inner surface of the heat-insulating member 7. More specifically, multiple reinforcing layers 10 cover the inner surfaces 8b of multiple segments 8 that make up the heat-insulating member 7. The inner surface 8b of each segment 8 has a semi-cylindrical shape. Therefore, the reinforcing layer 10 that covers the inner surface 8b of each segment 8 also has a semi-cylindrical shape.

In the embodiment shown in FIG. 5, the reinforcing layer 10 covers the inner and outer surfaces of the heat-retaining member 7. More specifically, multiple reinforcing layers 10 cover the inner and outer surfaces 8b and 8c of multiple segments 8 that make up the heat-retaining member 7.

In the embodiment shown in FIG. 6, the reinforcing layer 10 covers the entire circumference, including the inner and outer surfaces, of the heat-insulating member 7. More specifically, the multiple reinforcing layers 10 cover the inner surfaces 8b, outer surfaces 8c, and divided surfaces 8a of the multiple divisions 8 that make up the heat-insulating member 7. When the heat-insulating member 7 is attached to the piping 2, the exposed surfaces of the reinforcing layers 10 that cover the divided surfaces 8a of the multiple divisions 8 come into contact with each other. According to the embodiment shown in FIG. 6, almost the entirety of each division 8 is covered with the reinforcing layer 10, so that the heat-insulating member 7 can be reliably reinforced.

When high-temperature gas flows through the pipe 2 or when a heater is provided to heat the pipe 2, the pipe 2 itself may become hot. In addition, as described below, a heater may be placed inside the heat retention device 1. Therefore, the reinforcing layer 10 that covers at least the inner surface 8b of the partition 8 may have a heat resistance temperature higher than that of the heat retention member 7 in order to protect the heat retention member 7 from heat.

Figure 7 is a perspective view showing yet another embodiment of the heat retention device 1. The configuration of the embodiment shown in Figure 7 that is not specifically described is the same as the embodiment described with reference to Figures 1 to 3, so duplicate descriptions will be omitted.

The embodiment of the heat retention device 1 shown in FIG. 7 differs from the embodiments shown in FIGS. 1 to 6 in that it does not include the reinforcing layer 10 described above, and each of the multiple segments 8 has at least one dividing surface 12. In the embodiment shown in FIG. 7, the dividing surfaces 12 formed on each segment 8 are multiple cut surfaces extending in the longitudinal direction of the heat retention member 7. In one embodiment, only one cut surface may be formed on each segment 8.

The dividing surface 12, which is composed of a cut surface, extends from the inner surface 8b to the outer surface 8c of each divided body 8 and also extends along the entire length of each divided body 8, completely separating each divided body 8 into multiple parts. When the heat-insulating member 7 is attached to the pipe 2, the multiple separated parts of each divided body 8 come into close contact, minimizing the deterioration of the insulating performance due to heat leakage from the dividing surface 12 while providing the function of mitigating local distortion when an external force is applied, making it possible to prevent accidental destruction and even deterioration of the insulating performance due to cracks caused by destruction.

According to this embodiment, even if a crack occurs in a certain part of the heat-retaining member 7, the growth of the crack stops at the dividing surface 12 and does not cause cracks in other parts. As a result, cracks in the heat-retaining member 7 can be minimized and a decrease in the insulating effect can be prevented. The part where the crack occurs may be replaced with a new one.

Figure 8 is a perspective view showing yet another embodiment of the heat retention device 1. The configuration of the embodiment shown in Figure 8 that is not specifically described is the same as the embodiment described with reference to Figure 7, so duplicated description will be omitted. In the embodiment shown in Figure 8, the dividing surfaces 12 formed on each divided body 8 are multiple cut surfaces perpendicular to the longitudinal direction of the heat retention member 7. In one embodiment, only one cut surface may be formed on each divided body 8.

The dividing surfaces 12, which are formed from the cut surfaces, extend from the inner surface 8b to the outer surface 8c of each divided body 8 and cross each divided body 8, completely separating each divided body 8 into multiple parts. When the heat-retaining member 7 is attached to the piping 2, the separated multiple parts of each divided body 8 are in close contact with each other. The spacing between the dividing surfaces 12 is 2 mm to 300 mm, and more preferably 5 mm to 200 mm.

According to this embodiment, even if a crack occurs in a certain part of the heat-retaining member 7, the growth of the crack stops at the dividing surface 12 and does not induce cracks in other parts. As a result, cracks in the heat-retaining member 7 can be minimized. The part where the crack occurs may be replaced with a new one.

Figure 9 is a perspective view showing yet another embodiment of the heat retention device 1. The configuration of the embodiment shown in Figure 9 that is not specifically described is the same as the embodiment described with reference to Figure 7, so duplicated description will be omitted. In the embodiment shown in Figure 9, the dividing surfaces 12 formed on each divided body 8 are multiple semi-cylindrical cut surfaces extending along the inner circumferential surface 5 of the heat retention member 7. In one embodiment, only one cut surface may be formed on each divided body 8.

The dividing surface 12, which is formed by a cut surface of a semi-cylindrical shape, extends from one dividing surface 8a of each divided body 8 to the other dividing surface 8a, and also extends along the entire length of each divided body 8, completely separating each divided body 8 into multiple parts. When the heat-retaining member 7 is attached to the pipe 2, the separated multiple parts of each divided body 8 are in close contact with each other. Each divided body 8 separated by the dividing surface 12 forms a laminated structure made of a phenolic resin foam material. The dividing surface 12 of each divided body 8 has a cylindrical shape with a different radius.

According to this embodiment, even if a crack occurs in a certain part of the heat-retaining member 7, the growth of the crack stops at the dividing surface 12 and does not cause cracks in other parts. As a result, cracks in the heat-retaining member 7 can be minimized and a decrease in the insulating effect can be prevented. The part where the crack occurs may be replaced with a new one.

Figure 10 is a perspective view showing yet another embodiment of the heat retention device 1. The configuration of the embodiment shown in Figure 10 that is not specifically described is the same as the embodiment described with reference to Figure 7, so duplicated description will be omitted. In the embodiment shown in Figure 10, the dividing surface 12 formed in each divided body 8 is a plurality of slits extending in the longitudinal direction of the heat retention member 7. In one embodiment, only one slit may be formed in each divided body 8.

The dividing surface 12 consisting of slits is formed on the inner surface 8b of each divided body 8 and extends throughout each divided body 8 in the longitudinal direction of the divided body 8. Since the dividing surface 12 consisting of slits does not reach the outer surface 8c of each divided body 8, each divided body 8 is not completely separated into multiple parts. In this way, by stopping the dividing surface 12 midway, it is possible to distribute the stress that causes cracks and suppress the concentration of stress in certain areas while maintaining the insulating performance.

Figure 11 is a perspective view showing yet another embodiment of the heat retention device 1. The configuration of the embodiment shown in Figure 11 that is not specifically described is the same as the embodiment described with reference to Figure 10, so duplicated description will be omitted. In the embodiment shown in Figure 11, the dividing surface 12 formed from the slits is formed on the inner surface 8b of each divided body 8 and is perpendicular to the longitudinal direction of each divided body 8. Since the dividing surface 12 formed from the slits does not reach the outer surface 8c of each divided body 8, each divided body 8 is not completely separated into multiple parts.

As shown in FIG. 12, the embodiment of FIG. 10 may be combined with the embodiment of FIG. 11. In the embodiment shown in FIG. 12, the heat-retaining member 7 has a first slit (first dividing surface) 12A and a second slit (second dividing surface) 12B formed on the inner surface 8b of each divided body 8. The first slit 12A and the second slit 12B intersect with each other. Such first slits 12A and second slits 12B can minimize cracks that may occur in various directions.

Figure 13 is a perspective view showing yet another embodiment of the heat retention device 1. The configuration of the embodiment shown in Figure 13 that is not specifically described is the same as the embodiment described with reference to Figure 10, so duplicated description will be omitted. In the embodiment shown in Figure 13, the dividing surface 12 formed on each divided body 8 is a plurality of slits extending in the longitudinal direction of the heat retention member 7. The dividing surface 12 formed from the slits is formed on the outer surface 8c of each divided body 8 and extends over the entirety of each divided body 8 in the longitudinal direction of each divided body 8. The dividing surface 12 formed from the slits does not reach the inner surface 8b of each divided body 8, so each divided body 8 is not completely separated into a plurality of parts.

Figure 14 is a perspective view showing yet another embodiment of the heat retention device 1. The configuration of the embodiment shown in Figure 14 that is not specifically described is the same as the embodiment described with reference to Figure 11, so duplicated description will be omitted. In the embodiment shown in Figure 14, the dividing surface 12 formed from the slits is formed on the outer surface 8c of each divided body 8 and is perpendicular to the longitudinal direction of each divided body 8. Since the dividing surface 12 formed from the slits does not reach the inner surface 8b of each divided body 8, each divided body 8 is not completely separated into multiple parts.

As shown in FIG. 15, the embodiment of FIG. 13 may be combined with the embodiment shown in FIG. 14. In the embodiment shown in FIG. 15, the heat-retaining member 7 has a first slit (first dividing surface) 12A and a second slit (second dividing surface) 12B formed on the outer surface 8c of each divided body 8. The first slit 12A and the second slit 12B intersect with each other. Such first slits 12A and second slits 12B can minimize cracks that may occur in various directions.

The reinforcing layer 10 described with reference to Figures 1 to 6 can be applied to the embodiment described with reference to Figures 7 to 15. That is, at least one of the inner surface 8b, the outer surface 8c, and the divided surface 8a of each divided body 8 of the heat-retaining member 7 according to the embodiment described with reference to Figures 7 to 15 may be covered with the reinforcing layer 10.

Next, a heating device equipped with the above-mentioned heat retention device 1 will be described. The heating device described below is equipped with the heat retention device 1 described with reference to Figures 1 to 3, but the heat retention device 1 according to the other embodiments described above can also be similarly incorporated into the heating device described below.

Figure 16 is a perspective view showing the heating device attached to the pipe 2, and Figure 17 is a perspective view showing the heating device removed from the pipe 2. The heating device includes a heater 20, a thermal insulation material 21 that covers the outer surface of the heater 20, and the heat retention device 1 that covers the outer surface of the thermal insulation material 21. Both the heater 20 and the thermal insulation material 21 have a sheet shape and are flexible enough to be deformed along the outer surface of the pipe 2.

The heat insulating material 21 is attached to the outer surface of the heater 20. The heater 20 and the heat insulating material 21 have an integral structure. More specifically, the heater 20 and the heat insulating material 21 form a flexible, integral sheet-like structure. In one embodiment, the heater 20 and the heat insulating material 21 may be separate from each other. The heater 20 is detachably wrapped around the outer surface of the pipe 2. The heater 20 has a power line 23 and a heating element (not shown) such as a nichrome wire connected to the power line 23. The specific structure of the heater 20 is not particularly limited as long as it has a structure that can be deformed along the outer surface of the pipe 2. Examples of the heater 20 include a rubber heater and a sheet heater.

The insulating material 21 has a higher heat resistance temperature than the heat retaining member 7 of the heat retaining device 1. More specifically, the insulating material 21 has a higher heat resistance temperature than the heating temperature of the heater 20. Examples of the insulating material 21 include rock wool and glass wool. The insulating material 21 prevents the heat of the heater 20 from being transferred to the heat retaining member 7 of the heat retaining device 1, and can prevent damage to the heat retaining member 7.

As shown in FIG. 16, the entire heater 20 is covered by the heat retention device 1. Therefore, the heat generated by the heater 20 is prevented from being released into the surrounding atmosphere by the heat retention device 1. In other words, the heat generated by the heater 20 is efficiently transferred to the pipe 2, and the pipe 2 can be heated with less power consumption.

The following experiment was conducted to evaluate the heating devices of the embodiments shown in Figs. 16 and 17. A heating device having a structure according to the embodiment shown in Fig. 16 and a heating device as a comparative example shown in Fig. 18 were prepared, and the power consumption was measured when the pipe 2 was heated to the same temperature (180°C). The heating device of the comparative example shown in Fig. 18 has a structure in which the outer surface of the heater 20 is covered with a heat insulating material 21, and does not have a heat retention device 1.

According to an experiment, the power consumption of the heating device of the comparative example was approximately 63 kW, while the power consumption of the heating device of this embodiment was approximately 21 kW. From the results of this experiment, it was confirmed that a heating device equipped with a heat retention device 1 can reduce power consumption by 60 to 70% compared to a heating device not equipped with a heat retention device 1. Therefore, a heating device equipped with a heat retention device 1 of each of the above-mentioned embodiments can not only increase the mechanical strength of the heat retention device 1, but also reduce power consumption.

In the above embodiment, for simplicity, the dividing surface 8a and the dividing surface 12 of the heat-insulating member 7 are all shown as smooth surfaces, but in order to prevent the inner surface 8b and the outer surface 8c from penetrating each other in the shortest distance, it is of course possible to improve the heat-insulating effect by providing the dividing surface 8a and the dividing surface 12 with an uneven shape as shown in Figures 19 to 21.

The above-described embodiments have been described for the purpose of enabling a person having ordinary knowledge in the technical field to which the present invention pertains to practice the present invention. Various modifications of the above-described embodiments would naturally be possible for a person skilled in the art, and the technical ideas of the present invention may also be applied to other embodiments. Therefore, the present invention is not limited to the described embodiments, but is to be interpreted in the broadest scope in accordance with the technical ideas defined by the scope of the claims.

REFERENCE SIGNS LIST 1 Heat retention device 2 Pipe 5 Inner peripheral surface 7 Heat retention member 8 Divided body 8a Divided surface of divided body 8b Inner surface of divided body 8c Outer surface of divided body 10 Reinforcing layer 12 Partition surface 20 Heater 21 Insulating material 23 Power line

Claims (11)

A piping insulation device, comprising:
A heat-insulating member having an inner circumferential surface with a diameter larger than an outer diameter of the piping;
A reinforcing layer is provided to cover at least a portion of the heat-insulating member,
The heat-retaining member is made of a resin foam material,
The heat retaining member includes a plurality of divided bodies having divided surfaces extending in a longitudinal direction thereof,
the reinforcing layer covers at least one of inner surfaces and outer surfaces of the plurality of segments,
A heat retention device, wherein each of the multiple divided bodies maintains a semi-cylindrical shape by itself and has multiple first slits and multiple second slits formed on the inner surface of each divided body that intersect with each other, and the multiple first slits and the multiple second slits do not reach the outer surface of each divided body. A piping insulation device, comprising:
A heat-insulating member having an inner circumferential surface with a diameter larger than an outer diameter of the piping;
A reinforcing layer covering at least a portion of the heat-insulating member is provided,
The heat retaining member is made of a resin foam material,
The heat retaining member includes a plurality of divided bodies having divided surfaces extending in a longitudinal direction thereof,
the reinforcing layer covers at least one of inner surfaces and outer surfaces of the plurality of segments,
A heat retention device, wherein each of the multiple divided bodies maintains a semi-cylindrical shape by itself and has multiple first slits and multiple second slits that intersect with each other formed on the outer surface of each divided body, and the multiple first slits and the multiple second slits do not reach the inner surface of each divided body. The heat retention device according to claim 1 or 2, wherein the resin foam material is a phenolic resin foam material. The heat retention device according to claim 1 or 2, wherein the reinforcing layer covers the inner surface, the outer surface, and the divided surface of the plurality of divided bodies. The heat retention device according to any one of claims 1 to 4, wherein the heat retention member has a thermal conductivity of 0.05 W/(mK) or less. The heat retention device according to any one of claims 1 to 5, wherein the reinforcing layer is a coating film made of a polymer material. The heat retention device according to any one of claims 1 to 5, wherein the reinforcing layer comprises at least a metal. A piping insulation device, comprising:
A heat-insulating member having an inner circumferential surface with a diameter larger than an outer diameter of the piping,
The heat retaining member is made of a resin foam material,
The heat retaining member includes a plurality of divided bodies having divided surfaces extending in a longitudinal direction thereof,
A heat retention device, wherein each of the multiple divided bodies maintains a semi-cylindrical shape by itself and has multiple first slits and multiple second slits formed on the inner surface of each divided body that intersect with each other, and the multiple first slits and the multiple second slits do not reach the outer surface of each divided body. A piping insulation device, comprising:
A heat-insulating member having an inner circumferential surface with a diameter larger than an outer diameter of the piping,
The heat retaining member is made of a resin foam material,
The heat retaining member includes a plurality of divided bodies having divided surfaces extending in a longitudinal direction thereof,
A heat retention device, wherein each of the multiple divided bodies maintains a semi-cylindrical shape by itself and has multiple first slits and multiple second slits that intersect with each other formed on the outer surface of each divided body, and the multiple first slits and the multiple second slits do not reach the inner surface of each divided body. A heater and
A heat insulating material covering the outer surface of the heater;
A heating device comprising the heat retention device according to claim 1 , covering an outer surface of the insulating material. The heating device according to claim 10, wherein the heat resistance temperature of the insulating material is higher than the heat resistance temperature of the heat retaining member of the heat retaining device.

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