JP2002089756A - Heat insulation hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To visually identify a fluid while keeping a heat insulation function. SOLUTION: A space part 4 is sealingly divided and formed at a part of a heat insulation body 2 from an outer periphery surface 1a of a transparent inner pipe 1 to an inner periphery surface 3a of a transparent outer pipe 3. Thereby, since the inside of the transparent inner pipe 1 can be seen through while clamping the space part 4 from the outside of the transparent inner pipe 3 and an air layer at the inside of the space part 4 is sealed by the outer periphery surface 1a of the transparent inner pipe 1 and the inner periphery surface 3a of the transparent outer pipe 3, a heat insulation property is maintained. Since a moisture content is not invaded into the space part 4, dew condensation is not caused by a temperature difference at the inside and the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated hose for passing a cooled fluid or a heated fluid. More specifically, the present invention relates to a heat insulating hose in which a cylindrical heat insulator is coated on the outer peripheral surface of a transparent inner tube.

[0002]

2. Description of the Related Art Conventionally, this type of insulated hose is generally covered with a tubular heat insulator by an opaque foam material such as foamed rubber or foamed resin. When passing a cooled fluid through
Prevents condensation from forming on the outer surface of the hose to prevent various problems caused by water droplets.When passing heated fluid through the hose, prevent burns from accidentally touching the outer surface of the hose by the user. I have to. On the other hand, fluids that pass through the hose, for example, foods and the like that extremely dislike staying in the hose for a long time and need to immediately grasp the state of contamination on the inner surface of the hose, Some fluids, such as oil, are deteriorated during circulation and become inoperable. For these fluids, it is desired that the flow state in the hose can be always visually checked.

[0003]

However, in such a conventional heat-insulating hose, the opaque heat-insulating body hinders the state of the fluid flowing through the transparent inner tube, so that the state of the fluid flowing through the transparent inner tube cannot be visually confirmed. The fact that the hose stayed in the hose for a long time, the state of dirt on the inner surface of the transparent inner tube could not be immediately grasped, the cleaning time could be missed, and for example, deterioration of oil etc. could not always be confirmed, There is a problem that the replacement time is missed. In order to solve these problems, if the heat insulator is partially cut out to allow the inside of the transparent tube to be seen through, the heat insulation effect will not be sufficiently obtained, and the occurrence of dew condensation and burns will not occur. There is a problem that can not be prevented. Further, when the heat insulator is made of a foam material, the outer surface of the heat insulator which is always exposed is easily stained and easily worn, and as a result, there is a problem that the heat insulator cannot be used for a long time.

An object of the present invention is to make it possible to check a fluid while maintaining a heat insulating function. The second aspect of the present invention has the object of enabling the fluid to be confirmed over the entire length in the flow direction, in addition to the object of the first aspect of the present invention.

[0005]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, a transparent outer tube is coated on the outer periphery of a heat insulator, and a space is provided in a part of the heat insulator. The portion is formed in a sealed manner from the outer peripheral surface of the transparent inner tube to the inner peripheral surface of the transparent outer tube. Claim 2
The described invention is characterized in that a configuration in which the space is continuously or intermittently arranged along the axial direction of the transparent inner tube is added to the configuration of the invention described in the first aspect.

[0006]

According to the first aspect of the present invention, a space is formed in a part of the heat insulator from the outer peripheral surface of the transparent inner tube to the inner peripheral surface of the transparent outer tube in a hermetically-closed manner. From above, the inside of the transparent inner tube can be seen through the space part, and the air layer in the space part is sealed by the outer peripheral surface of the transparent inner tube and the inner peripheral surface of the transparent outer tube, so that heat insulation is maintained, and Since moisture does not enter the space, dew condensation does not occur due to a temperature difference between the inside and outside. According to a second aspect of the present invention, with respect to the configuration of the first aspect,
Since the configuration in which the space is continuously or intermittently arranged along the axial direction of the transparent inner tube is added, the space is continuously or intermittently arranged over the entire length of the transparent inner tube in the axial direction.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, as shown in FIGS. 1 to 3, a heat insulating hose A includes a transparent inner tube 1, a heat insulator 2 covering the outer peripheral surface 1 a thereof, and a transparent outer tube 3 covering the outer periphery of the heat insulator 2. In the direction perpendicular to the axial direction of the heat insulator 2, the annular space 4 is formed in a sealed manner from the outer peripheral surface 1a of the transparent inner tube 1 to the inner peripheral surface 3a of the transparent outer tube 3. It shows the case.

The transparent inner tube 1 is a hose or tube having a conventionally well-known structure formed of a flexible material such as a transparent synthetic resin into a tubular shape. A reinforcing wire made of resin or metal may be buried to such an extent that the transparency of the transparent inner tube 1 does not significantly decrease, so that the transparent inner tube 1 is hardly crushed or twisted.

The heat insulator 2 is made of an opaque foam material made of a flexible synthetic resin such as foamed rubber, polyvinyl chloride (PVC), polyurethane (PU), styrene or the like in order to enhance the heat insulation performance. The inner peripheral surface of the heat insulating body 2 is formed by inserting and fitting the inner peripheral surface of the inner peripheral surface of the heat insulating body 2 so as to be in close contact with the outer peripheral surface 1a of the transparent inner tube 1 or by sealing it with an adhesive. Air is prevented from entering and exiting from the outer peripheral surface 1a of the inner tube 1.

The transparent outer tube 3 is formed by extruding a coating made of a material having a higher strength than the foam material constituting the heat insulator 2, for example, a flexible material such as a transparent synthetic resin, on the outer peripheral surface of the heat insulator 2. Alternatively, a film formed of the same material is wound around the outer peripheral surface of the heat insulator 2, and the inner peripheral surface 3 a thereof is brought into close contact with the outer peripheral surface of the heat insulator 2. Further, by forming the outer peripheral surface 3b of the transparent outer tube 3 as a flat surface as shown in the drawing, it is easy to see through the transparent outer tube 3 without refraction.

A space 4 is formed in a part of the heat insulator 2 from the outer peripheral surface 1 a of the transparent inner tube 1 to the inner peripheral surface 3 of the transparent outer tube 3.
A section is formed in a sealed manner over a. In the case of the present embodiment, as shown in FIGS. 1 and 3, the intermediate portion of the heat insulator 2 is cut at regular intervals in a direction orthogonal to the axial direction, and both cut surfaces 2a, 2a are cut off. By separating the space portion 4 in the axial direction of the heat insulator 2, the space portion 4 is annularly formed in a direction orthogonal to the axial direction of the heat insulator 2.

Next, the operation of the heat insulating hose A will be described. As shown in FIGS. 1 to 3, the heat insulating hose A has a space 4 formed in a part of a heat insulator 2 so that the outer peripheral surface 1
a from the inner peripheral surface 3 a of the transparent outer tube 3.

As a result, the inside of the transparent inner tube 1 can be seen through the space 4 from the outside of the transparent inner tube 3. As a result, the inner surface of the transparent inner tube 1 can always be seen through from the outside of the transparent inner tube 3, and the both ends of the heat-insulating hose A are connected to the pipe, and the transparent inner tube is supplied from a supply source of fluid disposed at the upstream end thereof. When the fluid is passed through the inside 1, the flow state of the fluid can be seen from outside the transparent inner tube 3.

Further, since the air layer in the space 4 is sealed by the outer peripheral surface 1a of the transparent inner tube 1 and the inner peripheral surface 3a of the transparent outer tube 3, heat insulation is maintained. Does not penetrate, so there is no condensation due to temperature differences between inside and outside.

Therefore, it is possible to check the fluid while maintaining the heat insulation function, and it is possible to immediately grasp, for example, that the food has stayed in the transparent inner tube 1 for a long time and that the inside of the transparent inner tube 1 is dirty. As a result, the cleaning time is not missed. For example, the quality of oil or the like is constantly checked and the replacement time is not missed. Moreover, at the same time, when the cooled fluid is allowed to pass through the transparent inner tube 1, it is possible to prevent the occurrence of dew condensation on the outer surface of the transparent outer tube 3 to prevent various troubles caused by water droplets, When a heated fluid is allowed to pass through the tube 1, even if a user accidentally touches the outer surface of the transparent outer tube 3, no burn is caused.

Further, in the case of this embodiment, since the outer peripheral surface of the heat insulating body 2 made of a foam material is covered over the entire outer periphery by the transparent outer tube 3, it is possible to prevent the outer surface of the heat insulating hose A from being stained. While improving wear resistance.

On the other hand, those shown in FIGS. 4 and 5 and those shown in FIGS. 6 and 7 are each another embodiment of the present invention. 4 and 5 are different from the embodiment shown in FIGS. 1 to 3 in that the space portion 4 is continuously arranged along the axial direction of the transparent inner tube 1, Is the same as that of the embodiment shown in FIGS.

In the illustrated example, a part of the heat insulator 2 in the circumferential direction is cut out so as to have a C-shaped cross section, and the cut-out portion 4a is formed.
Are continuously opened in the axial direction of the heat insulator 2.

Thus, the space portion 4 is continuously arranged over the entire length of the transparent inner tube 1 in the axial direction. As a result, the embodiment shown in FIGS. 4 and 5 has an advantage over the embodiment shown in FIGS. 1 to 3 that the fluid can be confirmed without interruption over the entire length in the flow direction.

FIGS. 6 and 7 show the space 4
Are arranged intermittently along the axial direction of the transparent inner tube 1, unlike the embodiment shown in FIGS. 1 to 3, and other configurations are the same as those in the embodiment shown in FIGS. 1 to 3. Are the same.

In the illustrated example, a plurality of windows 4b are opened at appropriate intervals in the axial direction of the heat insulator 2.

Thus, the space portion 4 is intermittently arranged over the entire length of the transparent inner tube 1 in the axial direction. As a result, the embodiment shown in FIGS. 6 and 7 has an advantage over the embodiment shown in FIGS. 1 to 3 in that the fluid can be partially confirmed over the entire length in the flow direction.

The shape of the space 4 is not limited to the shape described above.
Any other shape may be used as long as it can be formed in a sealed manner from the outer peripheral surface 1a to the inner peripheral surface 3a of the transparent outer tube 3.

[0024]

As described above, according to the first aspect of the present invention, the space is partially sealed from the outer peripheral surface of the transparent inner tube to the inner peripheral surface of the transparent outer tube. By partitioning into a shape, the inside of the transparent inner tube can be seen through the space from outside of the transparent inner tube, and the air layer in the space is formed between the outer peripheral surface of the transparent inner tube and the transparent outer tube. Since the peripheral surface is sealed, heat insulation is maintained, and since water does not enter into the space, dew condensation does not occur due to a temperature difference between the inside and outside, so that the fluid can be confirmed while maintaining the heat insulation function. Therefore, for example, compared to the conventional case where the state of the fluid flowing in the transparent inner tube is obstructed by the opaque heat insulator and food cannot be visually confirmed, for example, the food stays in the transparent inner tube for a long time, Immediately grasp the dirt condition of the inner surface of the transparent inner tube, without missing the cleaning time, always confirm the deterioration of oil etc., without missing the replacement time, When passing the cooled fluid inside, prevent condensation from occurring on the outer surface of the transparent outer tube to prevent various problems due to water droplets,
Further, when a heated fluid is passed through the transparent inner tube, even if the user accidentally touches the outer surface of the transparent outer tube, no burn is caused. Furthermore, since the outer peripheral surface of the heat insulating body made of the foam material is covered over the entire outer periphery by the transparent outer tube, the abrasion resistance can be improved while preventing the outer surface from being stained, and as a result, it can be used for a long time.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the space is continuously or intermittently arranged over the entire length of the transparent inner tube in the axial direction, so that the fluid extends over the entire length in the flow direction. Can be confirmed.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a heat insulating hose showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line (2)-(2) of FIG.

FIG. 3 is an end view taken along line (3)-(3) in FIG. 1;

FIG. 4 is a partially cutaway perspective view of a heat insulating hose showing another embodiment of the present invention.

FIG. 5 is a sectional view taken along the line (5)-(5) of FIG.

FIG. 6 is a partially cutaway perspective view of a heat insulating hose showing another embodiment of the present invention.

FIG. 7 is a sectional view taken along the line (7)-(7) of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent inner tube 1a Outer peripheral surface 2 Heat insulator 3 Transparent outer tube 3a Inner peripheral surface 4 Space

Claims (2)

[Claims] 1. A heat insulating hose in which a cylindrical heat insulator (2) is coated on an outer peripheral surface (1a) of a transparent inner tube (1), wherein a transparent outer tube (3) is coated on an outer periphery of the heat insulator (2). A space (4) is formed in a part of the heat insulator (2) in a sealed manner from the outer peripheral surface (1a) of the transparent inner tube (1) to the inner peripheral surface (3a) of the transparent outer tube (3). An insulated hose characterized by being formed in sections. 2. The heat insulating hose according to claim 1, wherein the space (4) is arranged continuously or intermittently along the axial direction of the transparent inner tube (1).