JPH09210292A - Heat insulating material unit for elbow and method of its use - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dewing by eliminating a clearance between heat insulating material units coating a welding part of an elbow pipe. SOLUTION: In this heat insulating material unit, a part of an elbow pipe 10 is coated with a pair of heat insulating units 2 right/left separable by a surface including a center axial line of the elbow pipe 10 and a sheathing material 3 fixed to be wound in the periphery of a pair of these heat insulating units to have flexibility. Here, the heat insulating unit 2 has a length covering the elbow pipe 10 and partly a straight pipe 11 welded to both ends of this elbow pipe, a groove part is provided in an internal surface side location corresponding to a pipe welding part 12 of the respective heat insulating unit 2, a fiber unit 7 is provided in the groove part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elbow insulation unit for heat-insulating and covering elbow pipes, which are bent portions such as refrigerant pipes and water supply / drainage pipes, and a method of using the elbow insulation unit.

[0002]

2. Description of the Related Art It has been publicly known to cover refrigerant pipes for air conditioning and water supply / drainage pipes with a heat insulating material to prevent heat loss from the pipes and to prevent dew condensation on the pipes and surfaces.

It is also known to provide an insulating material to the elbow pipe provided in the elbow portion of the pipe. The applicant of the present application discloses, according to Utility Model Registration No. 3017570, as a heat insulating material unit of an elbow, "a pair of heat insulators having a shape covering the outer circumference of the elbow and separable left and right with respect to a surface including the central axis of the elbow, The pair of heat insulators is wound around the outer periphery and adhered to the flexible outer sheath material, and the outer sheath material is cut between the pair of heat insulators on the outer peripheral side of the bend, and the inner peripheral side of the bend. Proposes an elbow heat insulating material unit characterized in that the pair of heat insulating members are connected.

A large number of straight pipes and elbow pipes are arranged so that the pipes such as the refrigerant pipes and the water supply pipes are joined, and the joints of the pipes are joined by welding. Especially the elbow tube. In many cases, both ends are joined to the ends of the straight pipe by welding.

The elbow heat insulator or the elbow heat insulator unit that covers these is conventionally formed so that its length matches the length of the elbow pipe, and the elbow heat insulator is formed at the joint with the straight pipe portion. A body or elbow insulation unit was also connected.

[0006]

As in the conventional example, when the elbow heat insulator or the elbow heat insulator unit is formed to have the same length as the elbow pipe portion and only the elbow portion is covered, the elbow pipe is directly connected to the elbow pipe. Since the welded portion between the pipe and the heat insulating body serves as a connecting portion between the heat insulating bodies and a gap is easily formed, there is a problem that it is difficult to wind the tape around the outer peripheral portion, which is a processing of the exterior material.

Therefore, there has been a demand for a heat insulating material unit which can integrally cover the elbow pipe and the welded portion. However, there has been a problem that the joint portion between the elbow pipe and the straight pipe rises from other surface due to welding, and the inner surface of the heat insulator covering the welded portion floats above the pipe surface and cannot be covered closely.

Therefore, there is a problem that a gap is formed between the surface of the pipe and the heat insulator, and dew condensation easily occurs in the gap.

[0009]

[Means for Solving the Problems] In order to solve these problems, a pair of heat insulators which are separable into right and left by a plane including a central axis of an elbow pipe, and a pair of heat insulators are wrapped around and attached to the outer circumference of the heat insulators. In the elbow heat insulation unit that covers the elbow pipe portion with the flexible exterior material, the heat insulator has a length that covers the elbow pipe and a part of the straight pipe welded to both ends thereof, respectively. An elbow heat insulation unit is characterized in that a groove portion is provided in an inner surface side portion of the heat insulating body corresponding to the pipe welding portion, and a fibrous body is provided in the groove portion.

Further, a pair of heat insulators which are separable left and right by a surface including the central axis of the elbow pipe and have a concave portion and a convex portion at corresponding positions of the joining surfaces which face each other when facing each other in the same shape. In the elbow heat insulation unit in which the elbow pipe portion is covered with the flexible exterior material that is wrapped around and adhered to the pair of heat insulation bodies, the heat insulation body is directly welded to the elbow pipe and both ends thereof. A heat insulating material for an elbow, which has a length covering a part of a pipe, is provided with a groove portion at an inner surface side portion corresponding to a pipe weld portion of each heat insulating body, and is provided with a fibrous body in the groove portion. Suggest a unit.

The elbow pipe portion is covered with a pair of heat insulators that are separable to the left and right by a surface including the central axis of the elbow pipe, and a flexible exterior material that is wound around and attached to the outer circumferences of the pair of heat insulators. In the heat insulation unit for elbows, the heat insulator has a length that covers the elbow portion and a part of the straight pipe connected to both ends of the elbow portion, and the inner surface side portion corresponding to the pipe weld portion of each heat insulator is provided. Propose a method of using a heat insulating unit for elbows, which is characterized by forming a groove, filling the groove with a fibrous body, and then matching the groove to a pipe weld protruding from the pipe surface to cover the pipe with a heat insulator. To do.

Further, a pair of heat insulators which are separable left and right by a surface including the central axis of the elbow pipe and have a concave portion and a convex portion at corresponding positions of the facing joint surfaces when facing each other in the same shape. And an elbow heat insulation unit in which the elbow pipe portion is covered with a flexible exterior material that is wrapped around and attached to the outer circumference of the pair of heat insulation bodies, and the heat insulation body is connected directly to the elbow portions and both ends thereof. A pipe welding that has a length that covers a part of the pipe, forms a groove on the inner surface side part corresponding to the pipe weld of each heat insulator, and fills the fibrous body in the groove and then projects from the pipe surface. We propose a method of using a heat insulation unit for elbows, characterized in that the pipe is covered with a heat insulator by matching the groove portion with the groove portion.

[0013]

1 is a plan view of one heat insulating body of FIG. 1, which is a perspective view of one heat insulating body with a pair of elbow heat insulating material units separated from each other in the drawings showing the first embodiment of the present invention. 2, which is a cross-sectional explanatory view of the case where the elbow heat insulating material unit is attached to the elbow pipe, and FIG.
FIG. 4 is a plan view of one heat insulator with a pair of elbow heat insulation units separated from each other showing the embodiment of FIG. 4, and a cross-sectional explanatory view when the elbow heat insulation unit of the second embodiment is attached to an elbow pipe. FIG. 5, FIG. 6 is a partially cutaway plan view of the elbow heat insulating material unit of the first embodiment when attached to an elbow pipe and a straight pipe, and first and second embodiments of the present invention.
It demonstrates based on FIG. 7 which shows the perspective view of the state which closed the pair of elbow heat insulating material unit of embodiment.

In FIG. 6, 10 is an elbow pipe and 11 is a straight pipe. Reference numeral 12 denotes a welded portion which is a joint portion between the elbow pipe 10 and the straight pipe 11.

The heat insulating material unit 1a of the first embodiment shown in FIGS. 1 to 3 corresponds to the outer peripheral surface shape in which the elbow pipe 10 and a part of the straight pipes 11, 11 joined to both ends of the elbow pipe 10 are combined. A straight pipe 1 having a concave portion-covering surface 5 having a concave shape and joined to both ends of the elbow pipe 10 and the elbow pipe 10.
A pair of heat insulators 2a, which are shaped to cover a part of 1 and 11 and are separable to the left and right at a surface 10b including the central axis 10a of the elbow pipe 10, and a pair of heat insulators 2a, which are wrapped around the outer circumference of the heat insulator 2a And a flexible exterior material 3 to be attached. The sheath 3 is cut between the pair of heat insulators 2a and 2a on the bending outer circumference side of the elbow pipe 10, but is not cut on the bend inner circumference side, and the pair of heat insulating bodies 2a and 2a are The flexible exterior material 3 is openably and closably connected with the bending inner peripheral side as a folding line.

The pair of heat insulators 2a are composed of two heat insulators 2a, 2a having the same shape on the left and right sides, and are separably joined to each other at a joint surface 4 corresponding to the surface 10b including the central axis of the elbow pipe 10. The joint surface 4 of each heat insulator 2a is divided into a bend inner peripheral side joint surface 4a and a bend outer peripheral side joint surface 4b by a concave portion covering surface 5 in the central portion. The heat insulator 2a of this embodiment
The bending inner peripheral side joint surface 4a and the bending outer peripheral side joint surface 4b have a planar shape.

The pair of heat insulators 2b according to the second embodiment shown in FIGS. 4 and 5 includes an elbow pipe 10 and an elbow pipe 10.
The straight pipes 11, which are joined to both end portions of the
The elbow pipe 10 and the straight pipes 11 joined to both ends of the elbow pipe 10 have a shape capable of covering a part of the straight pipes 11, and can be separated left and right by a surface including the central axis of the elbow pipe, and have the same shape.

The joint surface 8 of the pair of heat insulators 2b is divided into a bend inner peripheral side joint surface 8a and a bend outer peripheral side joint surface 8b by the concave portion covering surface 5 in the central portion. The bending inner peripheral side joint surface 8a and the bending outer peripheral side joint surface 8b have a shape having convex portions 80a, 81a and concave portions 80b, 81b at corresponding positions of the joint surface 8 facing each other when facing each other.

In the second embodiment, a convex portion 80a and a concave portion 80b having the same length are formed in the outer diameter side region of the bending inner peripheral side joint surface 8a in the longitudinal direction of the elbow pipe portion, and the bending outer periphery is formed. In a region on the inner diameter side of the side joint surface 8b, a convex portion 81a and a concave portion 81b having the same length are formed in the elbow pipe portion longitudinal direction,
Moreover, the convex portion 80a and the convex portion 81a are formed at different positions in the longitudinal direction, and the convex portion 80a and the concave portion 81b are formed at corresponding positions in the longitudinal direction. Therefore, the pair of heat insulators 2b,
When 2b are opposed to each other, the convex portion 80a and the concave portion 80b are located at the positions where the bending inner peripheral side joint surfaces 8a face each other, and the convex portion 81a and the concave portion 81b are located at the positions where the bending outer peripheral side joint surfaces 8b face each other. To do. These convex portions 80a and concave portions 80b,
The convex portion 81a and the concave portion 81b are sized and shaped so that they can be fitted to each other, and by fitting these, the pair of heat insulators 2b and 2b are joined to each other at correct positions in the radial direction and the longitudinal direction. be able to.

A pair of heat insulators 2a, 2a and heat insulator 2
b, 2b, the radius of curvature of the elbow pipe part, the inner diameter of the concave portion covering surface 5, the thickness (joint surface width), etc., of the radius of curvature of the heat insulator 2a, 2a and the radius of the elbow pipe 10 to which the heat insulators 2b, 2b are attached, It is appropriately determined according to the diameter, the required heat insulating property, and the like.

The material of the heat insulator 2a and the heat insulator 2b may be any heat insulating material having heat resistance, such as organic fiber, inorganic fiber or the like, which is hardened with a binder, foam resin or the like. In particular, a felt obtained by hardening rock wool, which is an inorganic fiber, with a binder to provide shape retention is preferable because it can be easily formed into a desired shape and has excellent heat insulating properties and nonflammability. Even if the heat insulator 2a and the heat insulator 2b are formed by mixing the binder with the heat insulating material waste generated in the heat insulating work or the like using the heat insulating material made of rock wool or the like, which is normally discarded as industrial waste, Good. Heat insulator 2a and heat insulator 2b made of such heat insulating material scraps
Can make good use of industrial waste at low cost and has good thermal insulation properties.

On the concave portion covering surface 5 of the pair of heat insulators 2a and 2b, the concave portion covering surfaces are provided at two portions corresponding to the two welding portions 12 which are the joint portions between the elbow pipe 10 and the straight pipe 11. A groove portion 6 is provided which is oriented at a right angle to the recessed portion 5 direction. The groove portion 6 has a groove shape corresponding to the rising shape of the welded portion 12 of the pipe, but is formed in a groove deeper than the rising height of the welded portion 12 and wider than the rising width.

A fibrous body 7 made of a low-density fiber in the groove portion 6.
Is provided. The fibrous body 7 may be a heat-resistant fiber having a density of about 16 kg / m 3 and is a heat-resistant inorganic fiber such as glass wool, rock wool, or ceramic fiber. The exterior material 3 is provided to protect the heat insulating body 2a and the heat insulating body 2b, and is made of a non-combustible sheet material such as a glass cloth to which an aluminum foil is attached or a non-combustible non-woven fabric. In particular, the aluminum glass cloth adhesive tape can be easily wound around and fixed to the curved outer peripheries of the heat insulators 2a and 2b, and is excellent in the protective properties of the heat insulators 2a and 2b and excellent in nonflammability.

Next, a method of using the elbow heat insulating material unit according to the first embodiment of the present invention will be described.

The heat insulating unit 1a is a pair of heat insulators having a shape that matches the shape of the connected outer peripheral surface of the elbow pipe 10 and the straight pipes 11 joined to both ends of the elbow pipe 11 and parts of the straight pipes 11. 2a and 2a are used. That is, the joint surfaces 4 of the heat insulators 2a, 2a corresponding to the radius of curvature, the outer diameter, etc. of the elbow pipe 10 to be covered are matched, and the outer periphery thereof is covered with the exterior material 3.
Wrap and paste with. Next, the exterior material 3 is cut in accordance with the bent outer peripheral side joint surfaces of the heat insulating bodies 2a and 2a to manufacture the heat insulating material unit 1a. These are manufactured at the factory.

As a result, the pair of heat insulators 2a, 2a are
The outer peripheral side of the bend is connected by the exterior material 3 so that the inner peripheral side of the bend is bendable, and the outer peripheral side of the bend is separated so that it can be opened and closed.

Next, the heat insulating unit 1a is transported to the heat insulating work site. At the construction site, the pair of heat insulators 2a, 2
With a being connected to the inner side of the bend, the outer side of the bend is opened to temporarily cover the elbow pipe portion 10 and the straight pipe portion 11.
As a result, the welded portion 1 of the elbow pipe 10 and the straight pipe 11 of the pipe
The position of 2 is known, and the portion corresponding to the position of the welded portion 12 is marked.

A pair of heat insulators 2a, 2 removed from the pipe again
Each of a is two welded portions 1 of an elbow pipe 10 and a straight pipe 11.
The recessed portion covering surface 5 of the two marked portions corresponding to 2 is cut in the width direction to form the groove portion 6. The groove 6 is formed to be larger than the swelling shape of the welded portion 12 of the pipe. That is, the shape of the groove 6 is formed by cutting into a groove that is deeper than the rising height of the welded portion 12 and wider than the rising width. The portion where the groove 6 is formed is formed at the construction site according to the condition of the pipe and the welding state.

The formed groove portion 6 is filled with a fibrous body 7 made of low density fiber. Fiber body 7 is 16k
Any fiber having a heat resistance having a density of about g / m 3 cubic may be used, such as glass wool, rock wool, or a heat-resistant inorganic fiber such as ceramic fiber.

Heat insulators 2a, 2 having two grooves 6 formed therein
The a is covered with the elbow pipe 10 and the straight pipe 11 joined to both ends of the elbow pipe 10 such that the joint surfaces 4 of the pair of heat insulators 2 are aligned with each other. Then, the groove portion 6 matches the pipe welded portion 12 of the pipe, and the fibrous body 7 filled in the groove portion 6 is pushed by the raised welded portion 12 and adheres without forming a gap.

The heat insulators 2a, 2a are joined together by their joint surfaces 4, 4 to cover the pipe, and an adhesive tape such as an aluminum glass cloth adhesive tape (ALGC) is attached to the joint surface portion on the bending outer peripheral side. Thereby, the heat insulating material unit 1a can be attached to the pipe very easily.

Next, a method of using the elbow heat insulating material unit according to the second embodiment of the present invention will be described.

The elbow heat insulation unit 1b includes an elbow pipe 10 and a straight pipe 11 joined to both ends of the elbow pipe 10,
A pair of heat insulators 2b, 2b having a shape matched with the shape of the connected outer peripheral surface of a part of 11 are used. That is, the convex portions 80a and the concave portions 80b between the bending inner peripheral sides 8a of the joint surface 8 of the heat insulators 2b and 2b corresponding to the radius of curvature and the outer diameter of the elbow pipe 10 to be covered and the convex portions 8 between the bending outer peripheral sides 8b.
1a and the concave portion 81b are matched with each other so that the joint surfaces 8 are aligned with each other,
The outer periphery is wrapped with the exterior material 3 and attached. Next, the exterior material 3 is cut according to the bending outer peripheral side joint surface lines of the heat insulating bodies 2b and 2b to manufacture the heat insulating material unit 1b. These are manufactured at the factory.

As a result, the pair of heat insulators 2b, 2b are
The outer peripheral side of the bend is connected by the exterior material 3 so that the inner peripheral side of the bend is bendable, and the outer peripheral side of the bend is separated so that it can be opened and closed. $
Next, the heat insulating material unit 1b is transported to the heat insulating work site.
At the construction site, with respect to the elbow pipe 10 and the straight pipe 11 which are piped, the bending outer peripheral side is opened with the pair of heat insulators 2b, 2b being connected to the inner peripheral side of the bend, and the elbow pipe portion 10 and the straight pipe are connected. The part 11 is temporarily covered. Thus, the positions of the welded portions 12 of the elbow pipe 10 and the straight pipe 11 of the pipe are known, and the portions corresponding to the positions of the welded portions 12 are marked.

A pair of heat insulators 2b, 2 removed from the pipe again
Each of b is two welding parts 1 of the elbow pipe 10 and the straight pipe 11.
The recessed portion covering surface 5 of the two marked portions corresponding to 2 is cut in the width direction to form the groove portion 6. The groove 6 is formed to be larger than the swelling shape of the welded portion 12 of the pipe. That is, the shape of the groove 6 is formed by cutting into a groove that is deeper than the rising height of the welded portion 12 and wider than the rising width. The portion where the groove 6 is formed is formed at the construction site according to the condition of the pipe and the welding state.

The formed groove portion 6 is provided by filling a fibrous body 7 made of low density fiber. Fiber body 7 is 16k
Any fiber having a heat resistance having a density of about g / m 3 cubic may be used, such as glass wool, rock wool, or a heat-resistant inorganic fiber such as ceramic fiber.

Heat insulators 2b, 2 having two grooves 6 formed therein
b is covered with the elbow pipe 10 and the straight pipe 11 that is joined to both ends of the elbow pipe 10 together with the joint surfaces 8 of the pair of heat insulators 2b and 2b. Then, the bending inner peripheral side bonding surface 8
The convex portion 80a and the concave portion 80b are located at the positions where a is opposed to each other, and the convex portion 8 is provided at the position where the bending outer peripheral side joint surfaces 8b are opposed to each other.
1a and recess 81b are located. The convex portion 80a and the concave portion 80b, and the convex portion 81a and the concave portion 81b have dimensions and shapes that can be fitted to each other. By fitting these, the pair of heat insulators 2b and 2b can be arranged in the radial direction and the longitudinal direction. It is possible to join them in precise positions in both directions.

At this time, the groove portion 6 is the pipe welding portion 1 of the pipe.
2 and the fibrous body 7 filled in the groove 6 is pushed by the raised welded portion 12 and closely adheres without forming a gap.

The heat insulators 2b and 2b are joined together by their joint surfaces 8 and 8 to cover the pipe, and an adhesive tape such as an aluminum glass cloth adhesive tape (ALGC) is attached to the joint surface portion on the bending outer peripheral side. Thereby, the heat insulating material unit 1b can be attached to the pipe very easily.

[0040]

Therefore, according to the present invention, the elbow heat insulating material unit can be integrally covered, including the elbow pipe and the welded portion, and the workability is improved, and at the same time, between the heat insulating body and the pipe surface. Can be coated without creating a gap.

Therefore, since there is no gap between the surface of the pipe including the welded portion and the inner surface of the heat insulating body, it is difficult for dew to condense over the entire pipe.

Further, by providing the convex portion and the concave portion on the joint surface of the heat insulator, the joint of the elbow pipe portion becomes easier.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of one heat insulating body of a pair of elbow heat insulating material units according to the first embodiment of the present invention.

FIG. 2 is a plan view of the heat insulator of FIG.

[Fig. 3] Similarly, a cross-sectional explanatory view of the case where the heat insulation unit for elbow is attached to the elbow pipe.

FIG. 4 is a plan view of one heat insulating body of a pair of elbow heat insulating material units according to the second embodiment of the present invention.

FIG. 5 is a cross-sectional explanatory view of the case where the elbow heat insulating material unit of FIG. 4 is also attached to the elbow pipe.

FIG. 6 is a partially cutaway plan view of a plane in which the elbow heat insulating material unit of the embodiment of the present invention is attached to an elbow pipe and a straight pipe.

FIG. 7 is a perspective view showing a state in which a pair of elbow heat insulating material units according to the first and second embodiments of the present invention are closed.

[Explanation of symbols]

 1 Elbow Insulation Material Unit 2 Heat Insulation Body 3 Exterior Material 4 Joining Surface 5 Recessed Cover Surface 6 Groove 7 Fiber Body 8 Joining Surface 8a Bending Inner Side 80a Convex 80b Recess 8b Bending Outer Side 81a Convex 81b Recess 10 Elbow Pipe 11 Straight pipe 12 Welded part

Claims (4)

[Claims] 1. An elbow pipe portion formed by a pair of heat insulators that are separable left and right by a surface including a central axis of the elbow pipe, and a flexible exterior material that is wound around and adhered to the outer periphery of the pair of heat insulators. In the elbow heat insulating material unit for covering, the heat insulator has a length that covers the elbow pipe and a part of the straight pipe welded to both ends thereof, and the inner surface side corresponding to the pipe welded portion of each heat insulator. A heat insulating unit for an elbow, characterized in that a groove portion is provided in the portion, and a fibrous body is provided in the groove portion. 2. A pair of heat insulators which are separable left and right by a surface including the central axis of the elbow pipe and have a concave portion and a convex portion at corresponding positions of the facing joint surfaces when facing each other in the same shape. In the elbow heat insulation unit in which the elbow pipe portion is covered with the flexible exterior material that is wrapped around and adhered to the pair of heat insulation bodies, the heat insulation body is directly welded to the elbow pipe and both ends thereof. A heat insulating material for an elbow, which has a length covering a part of a pipe, is provided with a groove portion at an inner surface side portion corresponding to a pipe weld portion of each heat insulating body, and is provided with a fibrous body in the groove portion. unit. 3. The elbow pipe portion is composed of a pair of heat insulators that are separable to the left and right by a surface including the central axis of the elbow pipe, and a flexible exterior material that is wound around and adhered to the outer periphery of the pair of heat insulators. In the elbow heat insulating material unit for covering, the heat insulating body has a length that covers the elbow portion and a part of the straight pipe connected to both ends thereof, and the inner surface side corresponding to the pipe welded portion of each heat insulating body. A method for using an elbow insulation unit, characterized in that a groove is formed in a part, the groove is filled with a fibrous body, and then the pipe is covered with the heat insulator by aligning the groove with a pipe weld protruding from the pipe surface. . 4. A pair of heat insulators which are separable left and right by a surface including a central axis of an elbow pipe and have a concave portion and a convex portion at corresponding positions on opposing joint surfaces when facing each other in the same shape. And an elbow heat insulation unit in which the elbow pipe portion is covered with a flexible exterior material that is wrapped around and attached to the outer circumference of the pair of heat insulation bodies, and the heat insulation body is connected directly to the elbow portions and both ends thereof. A pipe welding that has a length that covers a part of the pipe, forms a groove on the inner surface side part corresponding to the pipe weld of each heat insulator, and fills the fibrous body in the groove and then projects from the pipe surface. A method of using an elbow heat insulating material unit, characterized in that the pipe is covered with the heat insulating material by matching the groove portion with the groove portion.