JP2731116B2 - Insulation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating device provided on a pipe and, more particularly, to a heat insulating device suitable for an elbow portion in which the pipe is bent at a predetermined curvature.

[0002]

2. Description of the Related Art Insulation devices made of fibrous materials, such as glass wool and rock wool, in which layers are oriented in layers are sheathed in piping such as air-conditioning piping and water / sewage piping. The fibrous body used as the heat insulating device has a basic shape of a cylinder, and the fibrous body is expanded into a pipe from an axial opening formed in the tubular fibrous body, and the fibrous body is formed into a predetermined pipe portion. The fibrous body is engaged, and then the opening is fastened with a tape or the like to be mounted.

The pipe comprises a straight portion and an elbow portion curved to a predetermined curvature (hereinafter referred to as a curvature of the shaft, hereinafter referred to as a curvature). The straight portion is provided with a fibrous body formed in a straight cylindrical shape. A curved tubular fibrous body will be attached to the elbow. In this case, the straight cylindrical fibrous body is formed from a roll-shaped raw material obtained by rolling a plate-shaped fibrous body, for example, or a raw material obtained by solidifying fibrous material in a roll or semi-roll shape from the beginning, and Several types are provided for different diameters, and roll-shaped raw materials having different diameters are prepared.

[0004] In the case of a curved tubular fibrous body, the same method is used as in the case of a straight tubular fibrous body. However, in this case, the curvature is different between the inside and the outside of the curve, so that a simple rolling molding or a roll shape is used. Instead of hardening, use a special type. This type of dedicated type is a combination of a difference in the pipe diameter of the elbow portion and a difference in the curvature, and requires a multiple of the number of the curvatures as compared with the case of a straight tubular fiber body.

[0005]

When a conventional curved tubular heat insulating device is mounted on an elbow-shaped pipe, a fibrous body formed into a curved tubular shape is, for example, divided in half along a cutting line along the axial direction. Or a cut must be made and the fibrous body must be opened. Then, after fitting around the pipe, a band-shaped sealing material is attached to the cut portion and connected. Such work will be done on site, and it is not possible to simply attach the heat insulation device as a product to the pipe as it is,
There is an annoyance that the installation manual must be notified to the construction worker. The present invention facilitates on-site work, and can produce a curved tubular fiber body from the same roll-shaped raw material as a straight tubular fiber body in a simple process, thereby providing a method of manufacturing a low-cost heat insulating device. Providing is an issue to be solved.

According to the first aspect of the present invention, the curved tubular body is covered with an elbow portion of the pipe, and the curved tubular body is made of a fibrous body. The smaller the outer side, the longer the axial direction is, the larger the length in the axial direction is.These divided pieces are cut into predetermined pieces along the plane perpendicular to the axis as elements, and the jacket is placed in a state where each divided piece abuts the end faces perpendicular to the axis. joined together in which each of said split pieces are integrated as the curved shape of the tubular body so as not to open individually, is a curved half cylinder piece that is bisected the curved shape of the cylindrical body by a plane containing the axis and, the curved semi-cylindrical peak of the curved semi-cylindrical piece is divided are connected with some
The feature is that the source is opened.

[0007]

A second aspect of the present invention is characterized in that the curved cylindrical body has an aluminum foil attached to the outer peripheral surface. The invention according to claim 3 is characterized in that the curved cylindrical body is covered with a hard and elastic outer cover. The cover is made of a resin such as polyethylene, for example, and has one opening substantially parallel to the axial direction for covering the fibrous body after the jacket on the pipe.

According to a fourth aspect of the present invention, of the plurality of divided pieces, the divided pieces at both ends are formed with grooves in the inner circumferential surface in the circumferential direction. This groove is for positioning with respect to the pipe.

[0010]

According to the first aspect of the present invention, a curved cylindrical body provided at the elbow portion of the pipe is cut into predetermined pieces along the plane perpendicular to the axis at a larger interval toward the inside of the curve and smaller toward the outside, and Since each divided piece is cut by one cutting line substantially parallel to the axial direction, the heat insulating device can be manufactured by cutting a roll-shaped raw material.

That is, the roll-shaped raw material is cut into a plurality of divided pieces on an inclined surface that is alternately changed in angle with respect to the axis of the roll-shaped raw material, and the divided pieces are coaxially formed with the side portions having a small axial length. It can be manufactured by joining the cut end faces so that the long side portions coincide with each other. For the difference in the curvature, the ratio of the side portion having a small axial length to the side portion having a large coaxial length is adjusted by changing the angle of the axis oblique surface. It is possible to cope with an elbow portion having any curvature. Also, when the curved cylindrical body is divided into curved half-cylinder pieces on the plane including the shaft, the metal foil stuck as a jacket on each divided piece is left uncut at the tangential portion of one cutting line. As a result, the curved half-barrel piece can be greatly expanded, so that it can be easily mounted on the elbow.

According to the second aspect of the present invention, since the aluminum foil is previously attached to the outer peripheral surface of the curved tubular body, the work of wrapping the tubular body attached to the pipe with the aluminum foil on site is unnecessary, Handling becomes extremely good.

According to the third aspect of the present invention, since the curved cylindrical body is covered with the hard and elastic outer cover, it is possible to cope with damage caused by a mouse or the like. According to the invention of claim 4,
By forming grooves formed by separating the fibrous material in the circumferential direction on the inner peripheral surfaces of the divided pieces at both ends, the positioning of the elbow portion in the axial direction becomes easy.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. 1 to 3 are configuration diagrams relating to a heat insulating device of a first embodiment according to the present invention. As shown in FIG. 1, the heat insulating device 1 mainly includes curved half cylindrical pieces 2 and 3. It is configured. The half cylinder pieces 2 and 3 are formed by bending a virtual curved cylinder covered by an elbow portion of the pipe with a curved axis (direction A).
Corresponding to the curved semi-cylindrical body cut in two with the inner cutting lines P ₁ in the sole plane and the outer cutting line P ₂ containing the reference).

The semi-cylindrical pieces 2 and 3 are fibrous bodies in which fibrous materials are oriented in layers in the circumferential direction B, and the curvature thereof is substantially equal to the curvature of the elbow portion in the pipe. And when it is attached to the elbow part, the inner cutting line P ₁
Cut edge 5 each other, the cutting edge 6 with each other at the outer cutting line P ₂ are joined by bonding or the like, the curved tubular body 6, as shown in FIG.

The semi-cylindrical pieces 2 and 3 each have a substantially triangular split piece 2a cut into predetermined pieces along the plane perpendicular to the axis at intervals (lengths) in the axial direction A that are smaller toward the inside and larger toward the outside. , 2b, 2c and divided pieces 3a, 3b, 3c
Are arranged in the middle part in the same order, and the divided pieces 2a having a larger axial length than the divided parts 2a, 3a, etc. of the middle part are provided at both ends.
Similar to A and 2B, large divided pieces 3A and 3B are arranged. Each adjacent divided piece, for example, 2A and 2a, 2
a and 2b, 3b and 3c, 3c and 3B, etc., the cut end surfaces that match the plane perpendicular to the axis are joined by an adhesive.

A metal foil 4 such as an aluminum foil is attached to the outer peripheral surfaces of the divided pieces 2a to 2c, 2A and 2B and the divided pieces 3a to 3c, 3A and 3B. Here, the metal foil 4a which is affixed the center between the divided pieces 2b, and 3b are left off upon cleavage at the outer cutting line P _1. As a result, the half-cylindrical pieces 2 and 3 are connected at their backs of the curved cylindrical body 6 by the metal foil 4a.

Since the metal foil 4 is attached to the roll-shaped raw material in advance as a jacket as described later, the divided pieces 2a to 2c, 2A and 2B and the divided pieces 3a to 3a
c, are cut together when cutting into 3A and 3B. For this reason, the gap formed by this cutting is filled with an adhesive (not shown). Thus, the arrangement of the divided pieces is further strengthened.

Further, divided pieces 2A and 2B at both ends, 3A,
Grooves 7 are formed on the inner peripheral surface of 3B by peeling the fibrous material in the circumferential direction. The groove 7 is engaged with, for example, a projection (not shown) of the elbow portion to facilitate positioning in the axial direction. The heat insulating device 1 having such a configuration includes a half cylindrical piece 2
Is mounted on the lower half of the elbow, and the half-tube piece 3 is mounted on the lower half of the elbow. At this time, an adhesive is applied to each of the cut end surfaces 5 and 6. Further, a tape is attached to the joint between the cut end surfaces 5 and 6 to reinforce the joint. By such an operation, the heat insulating device 1 can be easily mounted on the elbow portion. Since the curved tubular body 6 is separated into the half tubular pieces 2 and 3, the tubular body 6 can be greatly expanded and has a large curvature ratio, so that it can be easily attached to the elbow portion.

Further, as shown by a dashed line in FIG. 3, the heat insulating device 1 attached to the elbow may be covered with a cover 8. The cover 8 has one opening 8a on the inside that is substantially parallel to the axial direction A, and forcibly expands the opening 8a to cover the heat insulating device 1. The opening 8a is later fixed with a tape (not shown). Next, a manufacturing process of the heat insulating device 1 will be described with reference to FIG.

FIG. 3 shows a roll-shaped raw material. The fibrous body has an opening 10 parallel to the axial direction A ', as indicated by dotted hatching, and is formed into a roll at the stage of rolling or hardening the fibrous element. The roll-shaped raw material has a metal foil 4 (see FIG. 1) on the outer peripheral surface.
Shall be attached. Split pieces 2a to 2c, 3a
3c cut such a straight cylindrical fibrous body into ring-shaped divided pieces 2 'at axially inclined surfaces 9a and 9b whose angles are alternately changed with respect to the axis (direction A'). 4a
3, that is, the axial direction A ′ at the center in FIG.
Is left under certain conditions), and
It is also obtained by cutting a cutting surface 11 symmetrical to the opening 10. Then, of the triangular divided pieces obtained by cutting the ring-shaped divided piece 2 ′ at the cutting surface 11, a total of six pieces, two upper and lower divided pieces connected by the metal foil 4 a and an arbitrary divided piece, are taken out. FIG.
Is a set of divided pieces 2a to 2c and 3a to 3c of the intermediate portion.

Subsequently, these cut pieces are cut so that the cut end faces thereof are aligned so that the side portions having a small length T in the axial direction A 'and the side portions having a large length S in the axial direction A' coincide with each other. By joining, half cylinder pieces 2 and 3 as shown in FIG.
Can be manufactured. The split pieces 3A, 2A at both ends are cut in a plane perpendicular to the axial direction A 'after measuring the predetermined axial length after cutting the split pieces 2a to 2c, 3a to 3c.

When the curved cylindrical body 6 is manufactured from such a roll-shaped raw material, the difference in the curvature can be dealt with by changing the angles of the shaft oblique surfaces 9a and 9b. Also, as in the first embodiment, the curved cylindrical body 6 is cut along two inner and outer cutting lines P ₁ and P ₂ in only one plane including the axis, thereby forming a pair of half cylindrical pieces 2 and 3. Has a symmetrical shape, and a curved cylindrical body 6 is completed by joining the same-shaped ones to facilitate management.

[0024]

[0025]

[0026]

As described above, according to the first aspect of the present invention, the curved cylindrical body jacketed on the elbow portion of the pipe is
Since it is composed of each divided piece cut along a plane perpendicular to the axis at a larger interval toward the inside and smaller at the outside of the curve and cut along one cutting line substantially parallel to the axial direction, the roll-shaped material is By cutting into a plurality of divided pieces at an inclined surface with an angle that is alternately changed with respect to the axis of the material, a curved cylindrical body can be manufactured, and the difference in the curvature ratio can be changed only by changing the angle of the inclined surface. Since it can be dealt with, the production cost can be extremely reduced. In addition, when the curved cylindrical body is divided into a pair of curved half-cylinder pieces by two cutting lines in a plane including the axis, the metal foil stuck as a jacket on each divided piece has one cutting line. , The pair of curved half-cylinder pieces can be greatly expanded, and the attachment to the elbow can be facilitated. According to the second aspect of the present invention, since the aluminum foil is previously attached to the outer peripheral surface of the curved tubular body, the work of wrapping the tubular body attached to the pipe with the aluminum foil on site is unnecessary, and handling is extremely difficult. Become good.

According to the third aspect of the present invention, since the curved cylindrical body is covered with the hard and elastic outer cover, it is possible to cope with damage caused by a mouse or the like. According to the invention of claim 4,
By forming grooves formed by separating the fibrous material in the circumferential direction on the inner peripheral surfaces of the divided pieces at both ends, the positioning of the elbow portion in the axial direction becomes easy.

[0028]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state before being attached to a pipe of a heat insulating device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram for explaining a process of manufacturing the heat insulating device of the first embodiment.

FIG. 3 is an explanatory diagram showing a state where the heat insulating device according to the first embodiment is mounted on a pipe.

[Description of Signs] 1 is a heat insulating device, 2 and 3 are half cylinder pieces, 4
Is a metal foil, 6 is a curved cylindrical body, 7 is a groove, and P ₁ and P ₂ are cutting lines.

Claims (4)

(57) [Claims] 1. A curved cylindrical body encased in an elbow portion of a pipe, wherein the curved cylindrical body is formed of a fibrous body, and the axial length is smaller as the inside of the curve is smaller and the outer length is smaller as the outside. Each divided piece cut into a predetermined number along the plane perpendicular to the axis at a large interval in the axial direction is used as an element. with piece is one that is integrated as the curved shape of the tubular body so as not to open individually, is a bay <br/> song half tube piece which is bisected the curved shape of the cylindrical body by a plane containing the axis The heat insulating device, wherein the curved half-cylinder pieces are partially connected to each other and the two- divided curved half-cylinder pieces are opened. 2. The heat insulating device according to claim 1, wherein said curved cylindrical body has an aluminum foil attached to an outer peripheral surface thereof in advance. 3. The cylinder according to claim 1, wherein the cylinder is covered with a hard and elastic outer cover.
The heat insulation device according to the item. 4. The split piece at each end of each of the split pieces is formed with a groove in an inner peripheral surface in a circumferential direction.
The heat insulation device according to any one of claims 1 to 3.